专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0694506A DIFFERENTIAL PRESSURE TYPE WATER LEVEL MEASURING APPARATUS 失效
公开(公告)号：JPH0694506A
公开(公告)日：1994-04-05
申请号：JP24300092
申请日：1992-09-11
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHII KUNIO , OSHIMA MASANORI
IPC分类号： G01F23/14
摘要： PURPOSE:To measure an accurate water level at all times regardless of the fluctuation of pressure in a tank by providing a level switch which detects the varying of water level in a reference level vessel at the low pressure pipe side. CONSTITUTION:A differential pressure type water level measuring apparatus detects pressures of a vapor phase section and a water phase section of a tank 1 by means of a low pressure side detecting pipe 8 and a high pressure side detecting pipe 9 to measure the differential pressure as a water level. A reference level vessel 2 which supplies a reference level, is disposed in the pipe 8. When the pressure in the tank 1 becomes a negative pressure due to the variation of load of a plant, water in the reference level vessel 2 is sucked into the tank 1 so that the reference level goes down. The change of the reference level is detected by a level switch 4 connected to a reference level pipe 6 of which level is the same as that of the reference level vessel 2. On the basis of the signal, a water supply valve 5 disposed in a water supply pipe 7 is automatically controlled between the on/off conditions to open or close so that the reference level in the reference level vessel 2 is restored by supplying water therein by a reduced amount. Thereby, the reference level is maintained at all times so that the accurate water level is obtained.

2. 发明专利

JPH04305715A TEMPERATURE CONTROL DEVICE FOR HEATING EQUIPMENT 失效
公开(公告)号：JPH04305715A
公开(公告)日：1992-10-28
申请号：JP7079091
申请日：1991-04-03
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHIKAWA MASAJI , ISHII KUNIO , UCHIYAMA HITOSHI
IPC分类号： G05D23/19 , G05D23/24
摘要： PURPOSE:To uniformize the temperatures of respective parts in respective processes of temperature rise, temperature fixing and temperature drop by suppressing the generation of a temperature difference in respective adjacent parts. CONSTITUTION:A part corresponding to a heater 81 having the largest heating constant out of respective heaters 81 to 84 is set up as a reference part, the temperature of the reference part is detected by a temperature detector 11, a signal from a temperature setter 20 and a signal from the detector 11 are added/subtracted by an adder/substractor 31, a temperature controller 6 executes the control operation of the added/subtracted result, and a power controller 71 controls electric energy to be applied to the heater 81. In the heater 82 to be a part adjacent to the reference part, the temeprature of the part 82 and a set temperature difference are mutually added/subtracted, a temperature difference between the temperature of the reference part and that of the self-part 82 is added/subtracted to/from the added/subtracted value by an adder/subtractor 41, respective added/subtracted values are combined and mutually added/subtracted, the control operation of the obtained added/subtracted value is executed by a temperature controller 62, and electric energy to be applied to the heater 82 is controlled by a power controller 72. In the heaters 83, 84 to be the succeeding adjacent parts, a temperature difference between the temperature of the adjacent part and that of the self-part is found out by addition/subtraction and electric energy to be applied to the heaters 83, 84 are similarly controlled.

3. 发明专利

JPH08292080A DIFFERENTIAL PRESSURE TYPE WATER LEVEL MEASURING DEVICE 失效
公开(公告)号：JPH08292080A
公开(公告)日：1996-11-05
申请号：JP9652195
申请日：1995-04-21
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHII KUNIO , OSHIMA MASANORI
IPC分类号： G01F23/14
摘要： PURPOSE: To make accurate stage measurement and water level control achievable even in those of tanks whose pressure in unstable. CONSTITUTION: A level switch 4 is set up in a pipe 6 which performs the same level change as a reference surface apparatus 2, detecting a variation in a reference water head, and a make-up valve 5 is opened or closed by means of on-off control, supplying water, whereby the reference water head is always held aright and thus an accurate water level is securable.

4. 发明专利

JPS62278412A WATER LEVEL MEASURING INSTRUMENT IN NUCLEAR REACTOR 失效
公开(公告)号：JPS62278412A
公开(公告)日：1987-12-03
申请号：JP12111286
申请日：1986-05-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHII KUNIO , KIKUCHI TAKASHI
IPC分类号： G01F23/14
摘要： PURPOSE:To enable a nuclear reactor water level to be always accurately measured by providing a low pressure side detecting pipeline with a pressure gage and an arithmetic unit, detecting changes in a reference water level and correcting a measured water level value. CONSTITUTION:A pressure gage 4 is provided in a low pressure wide detecting pipeline below a reference level gage 3 and an arithmetic unit 7 is provided between a water gate 6 and a level indicator 8. A change in a reference water level due to a sudden change in the pressure of a nuclear reactor 1 is detected as a change in a water head. Since there has been the change in the reference water level, the measured value of the water gage 6 includes an error corresponding to the change in the water head. Accordingly, a quantity corresponding to the change in the water head detected by the pressure gate 4 is corrected by the arithmetic unit 7 and a corrected value is outputted to the indicator 8 whereby an accurate nuclear reactor water level can be obtained.

5. 发明专利

JPS5568838A INSULATING METHOD OF ROTOR 失效
公开(公告)号：JPS5568838A
公开(公告)日：1980-05-23
申请号：JP14237878
申请日：1978-11-20
申请人： HITACHI LTD
发明人： YASUHARA TAKASHI , KOBAYASHI HIDEAKI , SHIMOZU TADAO , ISHII KUNIO , FURUKAWA SEIICHI
IPC分类号： H02K3/50 , H02K15/12
摘要： PURPOSE:To maintain the flexibility of lead wire on preventing the entrance of vanish into the bottomed hole when the rotor is impregnated with vanish by closing the communicating hole, by which the lead wire is introduced to the bottomed hole provided to the center of rotary shaft, with vanish previously. CONSTITUTION:The lead wire 8 from the rotor winding 7 is made up with stranded wire, insulator cover of a part 12 of the lead wire is removed, the strands 14 are soldered and bundled. After this part 12 is covered with flexible insulator tube 15, the lead eire 8 is introduced into the bottomed hole 3 provided to the center of the rotary shaft 1 through the communicating hole 4, which is closed with compound 17, vahish is put in the bottomed hole 3 to close the communicating hole 4 completely. After this, the rotor is impregnated with vanish on preventing the entrance of vanish into the bottomed hole 3. In this way, the flexibility of lead wire can be maintained since the vanish is not attached to the lead wire in the bottomed hole.

6. 发明专利

JPS566648A ROTARY ELECTRIC MACHINE TO WHICH HIGH TEMPERATURE LOAD IS CONNECTED 失效
公开(公告)号：JPS566648A
公开(公告)日：1981-01-23
申请号：JP8018379
申请日：1979-06-27
申请人： HITACHI LTD
发明人： KOBAYASHI HIDEAKI , TAMURO TAIJI , YASUHARA TAKASHI , ISHII KUNIO
IPC分类号： H02K7/00 , D02J13/00 , H02K9/06 , H02K9/14 , H02K9/22
摘要： PURPOSE:To prevent the conduction of the heat from the load to the bearing, by composing the portion of a rotary shaft supported by the bearing by a member having a low thermal conductivity, composing a load-side shaft by a member having a high hardness, and providing a cooling means in the vicinity of the linking portion. CONSTITUTION:A portion 5a of a rotary shaft 5, to which a rotor 4 is installed, is supported by a bearing 9. Said portion 5a is composed of a member having a low thermal conductivity. A shaft end portion 5b to which a high temperature load 14 such as a heater roll is connected, is composed of a member having a high hardness. A cooling means such as cooling fans 12, cooling fins, and the like are provided in the vicinity of a linking portion 5c beween shaft portions 5a and 5b on the rotary shaft 5. In this constitution, the rotary shaft 5, wherein the load-side shaft end 5b has a sufficient hardness and the heat generated in the load 14 is not conducted to the bearing 9 can be obtained.

7. 发明专利

JP2000275390A SHIELD FOR THERMOMETER SHEATH GUIDE TUBE 失效
公开(公告)号：JP2000275390A
公开(公告)日：2000-10-06
申请号：JP7915099
申请日：1999-03-24
申请人： HITACHI LTD
发明人： MUTO KATSUTOSHI , ISHII KUNIO , MESHIDA MAKOTO
IPC分类号： G21D1/00 , G21C13/036 , G21F3/00
摘要： PROBLEM TO BE SOLVED: To improve the effect of radiation shielding and the performance on the maintenance and inspections of a thermometer with a simple and compact structure of a shield, by connecting a shield whose inner diameter satisfies the performance of the insertion of a thermometer sheath and the effect of radiation shielding and which has the length required for shielding and is shaped like a pipe to a straight part at a tip of a guide tube. SOLUTION: A thermometer sheath guide tube 4 guiding a thermometer sheath 5 of a thermometer shaped like a sheath that measures the temperature of equipment and piping 7 placed in a high-level radiation area 1 to a low-level radiation area 2 is bored through a straight pipe into a shielding wall 3. A shield 9 for the sheath guide tube 4 is connected to a tip of the tube 4 in the bored part of the shielding wall 3 and is buried in it. The gap between the surface of the thermometer sheath 5 and the inner diameter of the shield 9, where an error in the manufacturing of the thermometer sheath 5 is taken into account, is set to satisfy the performance of insertion and extraction of the thermometer sheath 5 and the effect of intercepting the radiation from the high-level radiation area 1. In this way, the length of the sheath guide tube 4 is shortened and the bent part of it is lessened because the shielding wall 3 is pierced by the straight pipe.

8. 发明专利

JPS5563537A COIL END HOLDING APPARATUS FOR SYNCHRONOUS MACHINE ROTOR 失效
公开(公告)号：JPS5563537A
公开(公告)日：1980-05-13
申请号：JP13681978
申请日：1978-11-08
申请人： HITACHI LTD
发明人： SHIMOZU SHIZUO , KOBAYASHI HIDEAKI , TAMURO TAIJI , ISHII KUNIO , FURUKAWA SEIICHI
IPC分类号： H02K3/51 , H02K3/04
摘要： PURPOSE:To restrain the coil end deformation and effect the improvement of holding intensity by superimposing coil ends in radial direction one above the other and fixing them together with the protective ring inserted from the shaft end by use of resin. CONSTITUTION:An end 3c' of a coil 3c inserted to the most outer slot 4c in a double-pole machine with a concentric winding is set on a rotor shaft 1 through an insulator 5. On the end 3c' superimoposed are coil ends 3b', 3a' inserted to inner slots in tutn. Then, a protective ring 6 with a non-magnetic member 7 is inserted from the shaft end and abutted to a stator core 2. After that, coil ends within the protective ring 6 are integrally unitized by forcing resin 8 thereinto. Thus, the deformation of coil ends under the centrifugal force is restrained and the holding intensity is improved, so that the machine can be operated smoothly and silently.

9. 发明专利

JP2007205912A Water level measurement device of differential pressure type 有权
标题翻译：差压式水位测量装置
公开(公告)号：JP2007205912A
公开(公告)日：2007-08-16
申请号：JP2006025557
申请日：2006-02-02
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MUTO KATSUTOSHI , ISHII KUNIO
IPC分类号： G01F23/18
摘要： PROBLEM TO BE SOLVED: To provide a water level measurement equipment of a differential pressure type capable of continuing operation with the other correct system even if an accident such as instrument trouble is caused, by eliminating the deviation between the regular system and the emergency system in the constitution of providing on either of regular system and emergency system with a level switch. SOLUTION: The water level measurement equipment of the differential pressure type comprises: vapor phase detection piping 102; liquid phase detection piping 103; a vapor phase side diaphragm 114; the liquid phase side diaphragm 115; a regular differential pressure detection system of the differential pressure detector 120 for detecting the water level of drain water level of a vessel 101 from the difference of the vapor phase side pressure and the liquid phase side pressure; the emergency differential pressure detection system of same constitution; and the level switch 130 for alarming high water level outputting connected by the upper detection piping 121 and the lower detection piping 122 between the piping 102 mutually connected with the vapor phase detection piping, and piping 103 mutually connected with the liquid phase detection piping, wherein the length from the vapor discharge port to the pressure receiving surface of each vapor phase side diaphragm 114 and the length from the vapor discharge port to the pressure receiving surface of each vapor phase side diaphragm 114 and from the liquid discharge port to pressure receiving surface of each liquid side diaphragm 115 are made set equal. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供能够与其他正确系统连续操作的差压水平测量设备，即使发生诸如仪器故障的事故，通过消除常规系统和应急系统在常规系统和应急系统中提供等级切换。
解决方案：差压式的水位测量设备包括：气相检测管道102; 液相检测管道103; 气相侧膜片114; 液相侧膜片115; 差压检测器120的常规差压检测系统，用于根据气相侧压力和液相侧压力的差来检测容器101的排水水位的水位; 相同构成的紧急差压检测系统; 以及用于警报在与气相检测管道相互连接的管道102之间的上部检测管道121和下部检测管道122连接的高水位输出的液位开关130以及与液相检测管道相互连接的管道103，其中从蒸汽排出口到每个气相侧隔膜114的受压面的长度以及从蒸气排出口到各气相侧隔膜114的受压面的长度，以及从液体排出口到压力接收面的长度使每个液体侧膜片115设定为相等。版权所有（C）2007，JPO＆INPIT

10. 发明专利

JPS61788B2 失效
公开(公告)号：JPS61788B2
公开(公告)日：1986-01-10
申请号：JP14237878
申请日：1978-11-20
申请人： HITACHI LTD
发明人： YASUHARA TAKASHI , KOBAYASHI HIDEAKI , SHIMOZU TADAO , ISHII KUNIO , FURUKAWA SEIICHI
IPC分类号： H02K3/50 , H02K15/12

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式