CN111902356A - Pump check valve replacement aid for hydraulic elevator and pump check valve replacement method - Google Patents
Pump check valve replacement aid for hydraulic elevator and pump check valve replacement method Download PDFInfo
- Publication number
- CN111902356A CN111902356A CN201880091771.2A CN201880091771A CN111902356A CN 111902356 A CN111902356 A CN 111902356A CN 201880091771 A CN201880091771 A CN 201880091771A CN 111902356 A CN111902356 A CN 111902356A
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- CN
- China
- Prior art keywords
- check valve
- pump
- base
- valve
- pump check
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
Abstract
Provided are a replacement aid for a pump check valve of a hydraulic elevator and a replacement method for the pump check valve, wherein the replacement operation of the pump check valve can be easily performed. The invention provides a replacement auxiliary tool for a pump check valve of a hydraulic elevator, which comprises: a crane base (19) provided below the valve (6) and having a cutout formed in the lower portion thereof in the longitudinal direction, the cutout corresponding to a step between the floor of the machine room (1) of the hydraulic elevator and the base of the pump (5); and a small hydraulic jack (16) provided on the upper surface of the base (19) for the crane at a position directly below the pipe (11) protruding from the valve (6).
Description
Technical Field
The invention relates to a replacement assistive device and a replacement method for a pump check valve of a hydraulic elevator.
Background
An oil tank, a pump and a valve are provided in a machine room of a hydraulic elevator. The valve is disposed above the pump and connected to the pump via a pump check valve. Patent document 1 listed below describes a hydraulic elevator.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-052610
Disclosure of Invention
Problems to be solved by the invention
The replacement work of the pump check valve is performed in a state where the pipe protruding from the valve in the lateral direction is lifted by a strap or the like, for example. In this case, the valve is inclined and in an unstable state, and thus the workability is poor.
The present invention has been made to solve the above problems. The purpose of the present invention is to provide a replacement aid for a pump check valve of a hydraulic elevator and a replacement method for a pump check valve, which can easily perform replacement work for the pump check valve.
Means for solving the problems
The invention provides a replacement auxiliary tool for a pump check valve of a hydraulic elevator, which comprises: a base for the crane, which is provided with a notch at the lower part along the long edge direction and is arranged below the valve, wherein the notch corresponds to the step difference between the ground of the machine room of the hydraulic elevator and the base of the pump; and a small hydraulic jack provided at a position directly below the pipe protruding from the valve on the upper surface of the base for the crane.
The method for replacing the check valve of the pump of the hydraulic elevator comprises the following steps: a base installation step of installing a base for a crane below the valve, the base for the crane having a cutout formed in a lower portion thereof along a longitudinal direction, the cutout corresponding to a step between a floor of a machine room of the hydraulic elevator and a base of the pump; a jack installation step of installing a small hydraulic jack at a position directly below a pipe protruding from a valve on an upper surface of a jack base; a jack-up step of jacking up the valve using a small hydraulic jack in a state where the pump check valve is not fixed to the pump; and a replacement step of replacing the pump check valve in a state where the valve is lifted up.
Effects of the invention
According to these inventions, the valves of the hydraulic elevator are jacked up by small hydraulic jacks. Therefore, the replacement work of the pump check valve can be easily performed.
Drawings
Fig. 1 is a schematic diagram showing an example of the structure of a hydraulic elevator.
Fig. 2 is a view 1 showing a pump check valve replacement assistant in embodiment 1.
Fig. 3 is a view 2 showing a pump check valve replacement assistant in embodiment 1.
Fig. 4 is a 1 st perspective view of a crane base according to embodiment 1.
Fig. 5 is a 2 nd perspective view of the crane base according to embodiment 1.
Fig. 6 is a view 1 showing a method of using the pump check valve replacement kit according to embodiment 1.
Fig. 7 is a view 2 showing a method of using the pump check valve replacement kit according to embodiment 1.
Fig. 8 is a view 3 showing a method of using the pump check valve replacement kit according to embodiment 1.
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. Duplicate descriptions are appropriately simplified or omitted.
Fig. 1 is a schematic diagram showing an example of the structure of a hydraulic elevator.
The hydraulic elevator has a machine room 1 and a hoistway 2. In the machine room 1, an oil tank 3, a motor 4, a pump 5, a valve 6, and a muffler 7 are provided. A car hydraulic jack 8 and a car 9 are provided in the hoistway 2. The car hydraulic jack 8 is connected to the muffler 7 by a pipe.
The motor 4, the pump 5, and the muffler 7 are disposed on the floor of the machine room 1, for example. The oil tank 3 is disposed above the motor 4, the pump 5, the valve 6, and the muffler 7. The valve 6 is disposed below the tank 3 and above the pump 5 and the muffler 7.
The valve 6 is connected to the pump 5 via a pump check valve 10. The lower portion of the pump check valve 10 is fixed to the upper portion of the pump 5 by, for example, bolts or the like. The upper portion of the pump check valve 10 is fixed to the lower portion of the valve 6 by, for example, bolts or the like.
The valve 6 has a tank-side pipe 11 and a muffler-side pipe 12. The tank-side pipe 11 and the muffler-side pipe 12 are L-shaped, for example. The tank-side pipe 11 and the muffler-side pipe 12 are formed of, for example, metal.
One end of the tank-side pipe 11 projects laterally from the valve 6. A rubber hose 13 extending downward from the tank 3 is fitted into the other end of the tank-side pipe 11. An end of the rubber hose 13 overlapping the other end of the tank-side pipe 11 is tightened with, for example, a not-shown band.
One end of the muffler-side pipe 12 projects laterally from the valve 6. One end of the muffler-side pipe 12 protrudes to the side opposite to the tank-side pipe 11. The other end of the muffler-side pipe 12 is connected downward to the muffler 7. The other end of the muffler-side pipe 12 is connected to the muffler 7 via a joint member, not shown, for example.
An endless belt 15 is wound around the motor 4 and the pulley 14 of the pump 5. When the pump 5 is driven by the motor 4, the oil in the oil tank 3 is sent to the hydraulic jack 8 for the car through the tank side pipe 11, the valve 6, the muffler side pipe 12, and the muffler 7. The car hydraulic jack 8 raises the car 9 by means of a rope, for example.
Fig. 2 is a view 1 showing a pump check valve replacement assistant in embodiment 1.
As shown in fig. 2, the pump check valve replacement assistant for a hydraulic elevator includes a small hydraulic jack 16, a pipe fixing fitting 17, a connecting pipe 18, and a jack base 19.
The small hydraulic jacks 16 are formed in a transportable size. When the small hydraulic jack 16 is driven by the manual lever, the plunger is moved upward.
The pipe fixing metal fittings 17 are, for example, a pair of plate-like members having a curved portion and a linear portion. The pair of bent portions are connected by a hinge or the like, for example. In a state where the pipe fixing metal fitting 17 is closed, the diameter of the ring formed by the pair of bent portions corresponds to, for example, the diameter of at least one of the tank-side pipe 11 and the muffler-side pipe 12.
The connecting pipe 18 is, for example, a linear pipe. The length of the connecting pipe 18 is smaller than the stroke of the small hydraulic jack 16, for example. The length of the connecting pipe 18 is longer than the length of the straight portion of the pipe fixing metal fitting 17, for example. The inner diameter of the connecting pipe 18 is larger than the head of the plunger of the small hydraulic jack 16, for example. The inner diameter of the connecting pipe 18 is larger than the width of the linear portion of the pipe fixing metal fitting 17, for example. The connecting pipe 18 has a receiving portion having an inner diameter smaller than that of the head portion of the plunger, for example, inside the middle portion in the longitudinal direction.
The crane base 19 is made of a lightweight material such as balsa.
Fig. 3 is a view 2 showing a pump check valve replacement assistant in embodiment 1. Fig. 3 shows a state in which the small hydraulic jack 16, the pipe fixing fitting 17, and the connecting pipe 18 are combined.
As shown in fig. 3, the plunger of the small hydraulic jack 16 is inserted into the connecting pipe 18 from below. The head of the plunger supports, for example, a receiving portion of the connecting pipe 18.
As shown in fig. 3, the pipe fixing fitting 17 is used so that the straight portion faces downward. The straight portion is inserted into the connecting pipe 18 from above. The pipe fixing fitting 17 is supported by, for example, bringing the lower end of the bent portion into contact with the upper end of the connecting pipe 18. The pipe fixing bracket 17 may be supported by bringing the lower end of the linear portion into contact with the head of the plunger of the small hydraulic jack 16, for example.
Fig. 4 is a 1 st perspective view of a crane base according to embodiment 1. Fig. 5 is a 2 nd perspective view of the crane base according to embodiment 1.
Fig. 4 shows a state as viewed from the upper surface 19a side of the crane base 19. Fig. 5 shows a state where the crane base 19 is viewed from the lower surface 19b side. The upper surface 19a is, for example, a plane parallel to the lower surface 19 b.
As shown in fig. 4 and 5, a cutout is formed in a lower portion of the crane base 19. The crane base 19 has a shape in which a portion corresponding to one of the angles along the longitudinal direction of the quadrangular prism is cut out, for example. The cutout is formed along the longitudinal direction of the crane base 19 when viewed from the vertical direction. The length in the longitudinal direction of the lower surface 19b is, for example, equal to the length in the longitudinal direction of the upper surface 19 a. The length of the lower surface 19b in the short side direction is shorter than the length of the upper surface 19a in the short side direction. Further, the length of the upper surface 19a in the short side direction is longer than the width of the bottom of the small hydraulic jack 16, for example.
The cutout of the crane-use base 19 is formed to a size corresponding to the step between the floor of the machine room 1 and the base of the pump 5.
The crane base 19 is provided on the ground between the motor 4 and the pump 5, for example. The crane base 19 is supported by a plurality of bolts attached to an upper surface of the base of the pump 5 in the vicinity of a left end thereof, for example, at a top portion 19c provided as a cutout. In this case, the length of the crane base 19 in the short side direction when viewed in the vertical direction is set so as not to interfere with the motor 4. At this time, the lateral width W of the notch is set according to the distance from the left end of the base of the pump 5 to the right end of the bolt. In this case, the height H of the cutout is set corresponding to the height from the floor of the machine room 1 to the upper end of the bolt.
Hereinafter, a method of replacing a pump check valve of a hydraulic elevator will be described with reference to fig. 6 to 8.
Fig. 6 is a view 1 showing a method of using the pump check valve replacement kit according to embodiment 1. Fig. 7 is a view 2 showing a method of using the pump check valve replacement kit according to embodiment 1. Fig. 8 is a view 3 showing a method of using the pump check valve replacement kit according to embodiment 1.
Fig. 6 and 8 are front views showing the periphery of the valve 6. Fig. 7 is a plan view showing the vicinity of the left end of the base of the pump 5. In fig. 6 to 8, the pulley 14 and the belt 15 are not shown.
When the pump check valve 10 is replaced, the 1 st releasing step is performed. In the first release step 1, the maintenance worker releases the fixation of the pump check valve 10 to the pump 5 by, for example, removing a bolt or the like from the lower portion of the pump check valve 10. In the first release step 1, the maintenance worker releases the fixation of the tank-side pipe 11 to the rubber hose 13 by, for example, removing the binding band from the end of the rubber hose 13. In the 1 st release step, the maintenance worker does not release the fixation of the muffler-side pipe 12 to the muffler 7, for example.
When the pump check valve 10 is replaced, a base installation step is performed. The base setting step is performed after the 1 st releasing step, for example. In the pedestal setting step, as shown in fig. 6, the serviceman sets the crane pedestal 19 below the left side of the valve 6. At this time, as shown in fig. 6, the lower surface 19b of the crane base 19 is in contact with the floor of the machine room 1. At this time, as shown in fig. 6, the top 19c of the cutout of the crane base 19 contacts the upper end of the bolt 20 attached to the upper surface near the left end of the base of the pump 5. At this time, as shown in fig. 7, the top 19c of the cutout is supported by a plurality of bolts 20.
After the base setting process, a jack setting process is performed. In the jack setting step, as shown in fig. 6, the serviceman sets the small hydraulic jack 16 at a position directly below the tank-side pipe 11 protruding from the valve 6 on the upper surface 19a of the jack base 19. At this time, as shown in fig. 7, the small hydraulic jack 16 is provided at a position closer to the front side than the center in the longitudinal direction of the crane base 19. At this time, since the belt 15 is present in front of the crane base 19, the small hydraulic jacks 16 are provided in a state in which the manual lever is directed to the rear side.
The jack setting step includes a joining step. In the coupling step, as shown in fig. 6, the maintenance worker couples the straight portion of the pipe fixing bracket 17, which is attached so as to sandwich the tank-side pipe 11 by the bent portion, to the plunger of the small hydraulic jack 16 by using the coupling pipe 18. At this time, the small hydraulic jack 16, the pipe fixing fitting 17, and the connecting pipe 18 are combined in the same relationship as in fig. 3.
After the jack setting step, the 2 nd releasing step is performed. In the second release step, the maintenance worker releases the fixation of the muffler-side pipe 12 to the muffler 7 by, for example, removing the joint member from the other end portion of the muffler-side pipe 12.
The site where the fixation is released in the 1 st releasing step and the 2 nd releasing step may be different from the above description. In the first release step 1, the fixation of the pump check valve 10 to the pump 5, the fixation of the tank-side pipe 11 to the rubber hose 13, and the fixation of the muffler-side pipe 12 to the muffler 7 may be released at two or one of them. In the 2 nd releasing step, the remaining one or two fixing portions that have not been released in the 1 st releasing step may be released. By performing the 2 nd releasing step after the jack setting step, the valve 6 can be prevented from being in a state without any support.
After the 2 nd releasing step, a jack-up step is performed. In the jack-up process, as shown in fig. 8, the serviceman jacks up the valve 6 using the small hydraulic jack 16 in a state where the pump check valve 10 is fixed to the valve 6 and not fixed to the pump 5. At this time, the serviceman operates the manual lever of the small hydraulic jack 16 from the back side of the jack base 19. At this time, the other end portion of the tank-side pipe 11 enters the rubber hose 13 deeper than the state of fig. 6. At this time, the other end of the muffler-side pipe 12 is pulled out upward from the muffler 7.
After the jack-up process, a replacement process is performed. In the replacement process, the maintenance worker replaces the pump check valve 10 fixed to the valve 6 in a state where the valve 6 is lifted up.
The service person then releases the pressure of the small hydraulic jacks 16, lowering the valve 6 to the original height.
The maintenance personnel then secure a new pump check valve 10 to the pump 5. The maintenance worker fixes the tank-side pipe 11 to the rubber hose 13. The maintenance worker fixes the muffler-side pipe 12 to the muffler 7.
After that, the maintenance worker removes the small hydraulic jack 16, the pipe fixing bracket 17, the connecting pipe 18, and the jack base 19.
According to embodiment 1 described above, the crane base 19 is provided below the valve 6 with a cutout formed in the lower portion in the longitudinal direction, the cutout corresponding to the step between the floor of the machine room 1 of the hydraulic elevator and the base of the pump 5. The small hydraulic jack 16 is provided at a position directly below the pipe protruding from the valve 6 on the upper surface of the jack base 19. Therefore, the valve 6 can be lifted up in a stable state without tilting by the small hydraulic jack 16. As a result, the workability and safety can be improved, and the replacement work of the pump check valve 10 can be easily performed.
The crane base 19 is formed to have a length in the longitudinal direction larger than the interval between the plurality of bolts 20 attached to the upper surface of the base of the pump 5, and the height of the top 19c of the cutout is formed to correspond to the height from the ground to the upper ends of the plurality of bolts 20. Therefore, the small hydraulic jack 16 can be provided directly below the pipe projecting in the lateral direction of the valve 6.
The pipe fixing fitting 17 is attached to a pipe protruding laterally from the valve 6. The connecting pipe 18 connects the lower part of the pipe fixing fitting 17 to the upper part of the small hydraulic jack 16. Therefore, the force of the small hydraulic jack 16 can be reliably transmitted to the valve 6.
The crane base 19 may be provided on the floor between the muffler 7 and the pump 5, for example. The crane base 19 may be supported by a plurality of bolts attached to the upper surface of the base of the pump 5 near the right end thereof, for example, with the top 19c of the cutout. In this case, the length of the crane base 19 in the short side direction when viewed in the vertical direction is set so as not to interfere with the muffler 7. At this time, the lateral width W of the notch is set according to the distance from the right end of the base of the pump 5 to the left end of the bolt. In this case, the height H of the cutout is set corresponding to the height from the floor of the machine room 1 to the upper end of the bolt.
The pipe fixing metal fittings 17 and the connecting pipes 18 may be configured to be able to connect both the tank side pipe 11 and the muffler side pipe 12 to the small hydraulic jacks 16 at the same time, for example. In this case, the valve 6 can be lifted by applying a force to both the two pipes protruding to the left and right of the valve 6.
The crane base 19 may be configured to fix the small hydraulic crane 16 to the upper surface 19a, for example. In this case, the safety can be further improved.
Industrial applicability
The invention can be used when replacing the pump check valve of a hydraulic elevator.
Description of the reference symbols
1: a machine room;
2: a hoistway;
3: an oil tank;
4: a motor;
5: a pump;
6: a valve;
7: a muffler;
8: a hydraulic jack for a car;
9: a car;
10: a pump check valve;
11: a tank-side pipe;
12: a muffler side pipe;
13: a rubber hose;
14: a pulley;
15: a belt;
16: a small hydraulic jack;
17: a fitting for fixing a pipe;
18: a connecting pipe;
19: a base for a crane;
19 a: an upper surface;
19 b: a lower surface;
19 c: a top portion;
20: and (4) bolts.
Claims (6)
1. A hydraulic elevator pump check valve replacement auxiliary tool is provided with:
a base for the crane, which is provided below the valve and has a notch formed at the lower part along the long side direction, wherein the notch corresponds to the step difference between the ground of the machine room of the hydraulic elevator and the base of the pump; and
and a small hydraulic jack provided at a position directly below a pipe protruding from the valve on an upper surface of the crane base.
2. Hydraulic elevator's pump check valve replacement aid according to claim 1,
the length of the crane base in the longitudinal direction is formed to be larger than the interval between the plurality of bolts attached to the upper surface of the pump base, and the height of the top of the cutout is formed to correspond to the height from the ground to the upper ends of the plurality of bolts.
3. Hydraulic elevator's pump check valve replacement aid according to claim 1 or 2,
the hydraulic elevator pump check valve replacement auxiliary tool further comprises:
a pipe fixing fitting attached to a pipe protruding from the valve; and
and a connecting pipe for connecting the pipe fixing fitting to an upper portion of the small hydraulic jack.
4. A method of replacing a pump check valve of a hydraulic elevator, comprising:
a base installation step of installing a base for a crane, which has a cutout formed in a lower portion thereof in a longitudinal direction thereof, below the valve, the cutout corresponding to a step between a floor of a machine room of the hydraulic elevator and a base of the pump;
a jack installation step of installing a small hydraulic jack at a position directly below a pipe protruding from a valve on an upper surface of the base for the jack;
a jack-up step of jacking up the valve using the small hydraulic jack in a state where the pump check valve is not fixed to the pump; and
and a replacement step of replacing the pump check valve in a state where the valve is lifted up.
5. The method for replacing a pump check valve of a hydraulic elevator according to claim 4,
in the base setting step, the crane base is set such that the top of the cutout is supported by a plurality of bolts attached to the upper surface of the pump base.
6. The method for replacing a pump check valve of a hydraulic elevator according to claim 4 or 5,
the jack setting step includes a coupling step of coupling a pipe fixing fitting attached to a pipe protruding from a valve to an upper portion of the small hydraulic jack by a coupling pipe.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/017266 WO2019207786A1 (en) | 2018-04-27 | 2018-04-27 | Jig for replacing pump check valve of hydraulic elevator and pump check valve replacing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111902356A true CN111902356A (en) | 2020-11-06 |
| CN111902356B CN111902356B (en) | 2022-06-03 |
Family
ID=67614904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880091771.2A Active CN111902356B (en) | 2018-04-27 | 2018-04-27 | Pump check valve replacement aid for hydraulic elevator and pump check valve replacement method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6558504B1 (en) |
| CN (1) | CN111902356B (en) |
| WO (1) | WO2019207786A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2510545Y (en) * | 2001-08-17 | 2002-09-11 | 福建省建筑科学研究院 | Lifting inclination-correcting structure |
| CN202252649U (en) * | 2011-09-05 | 2012-05-30 | 武昌造船厂集团有限公司 | Inclined-plane jacking adjuster |
| CN105127951A (en) * | 2015-09-29 | 2015-12-09 | 云南大红山管道有限公司 | Extractor for high-pressure ore slurry diaphragm pump non-return valve seat |
| CN205043725U (en) * | 2015-08-14 | 2016-02-24 | 兰成刚 | Multi -functional high pressure valve is parallel operation more |
| CN206345630U (en) * | 2016-12-02 | 2017-07-21 | 翟淑丽 | A kind of valve power-assisted changer |
| CN206623045U (en) * | 2017-03-29 | 2017-11-10 | 神华集团有限责任公司 | Valve dismantling device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0330499Y2 (en) * | 1985-10-19 | 1991-06-27 | ||
| JPH0444549Y2 (en) * | 1987-05-09 | 1992-10-20 | ||
| JP2001048485A (en) * | 1999-08-12 | 2001-02-20 | Nichias Corp | Jack-up device and jack-up method for pipe |
| JP2003049535A (en) * | 2001-08-03 | 2003-02-21 | Sekisui House Ltd | Scaffolding base trestle for step part |
| US10279437B2 (en) * | 2015-12-29 | 2019-05-07 | Sumner Manufacturing Company, Llc | Jack stand apparatus adaptable to various diameters of pipe |
-
2018
- 2018-04-27 CN CN201880091771.2A patent/CN111902356B/en active Active
- 2018-04-27 WO PCT/JP2018/017266 patent/WO2019207786A1/en active Application Filing
- 2018-04-27 JP JP2018543404A patent/JP6558504B1/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2510545Y (en) * | 2001-08-17 | 2002-09-11 | 福建省建筑科学研究院 | Lifting inclination-correcting structure |
| CN202252649U (en) * | 2011-09-05 | 2012-05-30 | 武昌造船厂集团有限公司 | Inclined-plane jacking adjuster |
| CN205043725U (en) * | 2015-08-14 | 2016-02-24 | 兰成刚 | Multi -functional high pressure valve is parallel operation more |
| CN105127951A (en) * | 2015-09-29 | 2015-12-09 | 云南大红山管道有限公司 | Extractor for high-pressure ore slurry diaphragm pump non-return valve seat |
| CN206345630U (en) * | 2016-12-02 | 2017-07-21 | 翟淑丽 | A kind of valve power-assisted changer |
| CN206623045U (en) * | 2017-03-29 | 2017-11-10 | 神华集团有限责任公司 | Valve dismantling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111902356B (en) | 2022-06-03 |
| JPWO2019207786A1 (en) | 2020-04-30 |
| WO2019207786A1 (en) | 2019-10-31 |
| JP6558504B1 (en) | 2019-08-14 |
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Address after: Tokyo, Japan Patentee after: Mitsubishi Electric Building Solutions Co.,Ltd. Address before: Tokyo, Japan Patentee before: MITSUBISHI ELECTRIC BUILDING TECHNO-SERVICE Co.,Ltd. |