CN211230803U - Automatic air bleeder of plunger pump import - Google Patents
Automatic air bleeder of plunger pump import Download PDFInfo
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- CN211230803U CN211230803U CN201921830591.XU CN201921830591U CN211230803U CN 211230803 U CN211230803 U CN 211230803U CN 201921830591 U CN201921830591 U CN 201921830591U CN 211230803 U CN211230803 U CN 211230803U
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- 230000008676 import Effects 0.000 title claims abstract description 25
- 210000004907 gland Anatomy 0.000 claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 28
- 230000000740 bleeding effect Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 description 27
- 238000009434 installation Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The application discloses automatic air bleeder in plunger pump import belongs to oil field corollary equipment technical field. The plunger pump inlet automatic air bleeder comprises a three-way pipe, a gland, an exhaust valve and a floating plug, wherein the three-way pipe comprises an exhaust end and two mounting ends, the gland is fixed at the exhaust end, the gland is provided with a first through hole communicated with the three-way pipe, one end of the exhaust valve is fixed in the first through hole, the exhaust valve is provided with a second through hole communicated with the first through hole, the side wall of the exhaust valve is provided with an exhaust hole, two ends of the exhaust hole are respectively communicated with the second through hole and the three-way pipe, the floating plug comprises a floating body and a plugging body, the plugging body is slidably mounted in the second through hole, when the plunger pump inlet automatic air bleeder is in a non-exhaust state, the plugging body plugs the exhaust hole, and. By adopting the air release device, frequent air release by stopping the pump is not needed, the labor capacity is reduced, the air release channel can be automatically opened and closed, and the automatic air release of the inlet of the plunger pump is realized.
Description
Technical Field
The application relates to the technical field of oilfield corollary equipment, in particular to an automatic air bleeder of plunger pump import.
Background
At present, the inlet pressure of a plunger pump adopted in an oil field during operation needs to be controlled to be more than 0.03MPa so as to meet the liquid inlet requirement. When the inlet pipeline of the plunger pump is mixed with gas, the pressure is reduced, and in order to avoid the problems of plunger pump damage, plunger pump body vibration, displacement reduction and the like caused by pressure reduction, the gas needs to be discharged at the inlet of the plunger pump when the gas is mixed in the inlet pipeline of the plunger pump.
In the related art, when the inlet of the plunger pump is deflated, the pump needs to be stopped first, a gate on the inlet pipeline of the plunger pump is opened to exhaust air, and then the plunger pump is started.
In the course of implementing the present application, the inventors found that the related art has at least the following problems:
in the related art, when the inlet of the plunger pump is deflated, the pump needs to be stopped frequently, so that the labor capacity is increased, and the control on the deflation operation of the inlet of the plunger pump is not convenient enough.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an automatic air bleeder in plunger pump import, can solve the technical problem that exists among the correlation technique. The technical scheme of the automatic air release device for the inlet of the plunger pump is as follows:
the embodiment of the application provides an automatic air bleeder of a plunger pump inlet, which comprises a three-way pipe, a gland, an exhaust valve and a floating plug, wherein,
the three-way pipe comprises an exhaust end and two mounting ends, and the two mounting ends are used for being mounted in an inlet pipeline of the plunger pump;
the gland is fixed at the exhaust end and is provided with a first through hole communicated with the inside of the three-way pipe;
one end of the exhaust valve is fixed in the first through hole, the exhaust valve is provided with a second through hole communicated with the first through hole, the side wall of the exhaust valve is provided with an exhaust hole, and two ends of the exhaust hole are respectively communicated with the second through hole and the inside of the three-way pipe;
the floating blanking plug comprises a floating body and a blocking body, and the floating body is used for floating on liquid in the three-way pipe;
the blocking body is slidably mounted in the second through hole, and when the automatic air bleeder of plunger pump import is in the non-exhaust state, the blocking body blocks the exhaust hole, and when the automatic air bleeder of plunger pump import is in the exhaust state, the blocking body does not block the exhaust hole.
Optionally, automatic air bleeder of plunger pump import still includes the anticreep cover, the anticreep cover has network structure, the anticreep cover is in the outside of floating the body, works as floating the body with during the contact of anticreep cover, the jam body is located the lower part in exhaust hole, just the jam body does not break away from the second through-hole.
Optionally, the anti-dropping cover is fixed on the press cover.
Optionally, the exhaust valve further comprises a sealing groove and a sealing ring, the sealing groove is located on a hole wall of the second through hole of the exhaust valve, the sealing groove is located above the exhaust hole, and the sealing ring is located in the sealing groove.
Optionally, the floating plug is formed by welding a floating body and a plugging body.
Optionally, the floating body is a hollow floating ball.
Optionally, the automatic air bleeder of plunger pump import still includes the blast pipe, the first end of blast pipe is fixed in first through-hole, the second end of blast pipe communicates with each other with the external world.
Optionally, the opening of the second end of the exhaust pipe faces downward.
Optionally, the exhaust pipe is in threaded connection with the first through hole.
Optionally, the plunger pump inlet automatic air bleeding device further comprises a control valve, and the control valve is mounted on the exhaust pipe.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
the utility model provides an automatic air bleeder in plunger pump import can install two installation ends of three-way pipe in the inlet pipeline of plunger pump, when there is not gas in the inlet pipeline of plunger pump, the shutoff exhaust hole of jam body. When gas enters the inlet pipeline of the plunger pump gradually, the gas enters the inside of the three-way pipe and is gathered at the top of the exhaust end, the liquid level is reduced gradually, the floating body drives the blocking body to move downwards, the blocking body moves downwards to open the exhaust hole, the gas enters the second through hole from the exhaust hole, and the second through hole is communicated with the first through hole, so that the gas is discharged from the first through hole. When the gas is discharged, the liquid level rises, the floating body drives the plugging body to move upwards under the action of buoyancy, and the plugging body plugs the exhaust hole to prevent the liquid from flowing out. Therefore, the automatic air bleeder in plunger pump import that this application embodiment provided need not frequently stop the pump gassing, has reduced the amount of labour, can realize opening automatically and close the gassing passageway, has realized the automatic gassing in plunger pump import, has realized the convenient and fast control of plunger pump import gassing operation.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic structural diagram of an automatic air bleeding device for an inlet of a plunger pump according to an embodiment of the present disclosure;
fig. 2 is a top view of the anti-drop cover 5 in the automatic air-release device of the plunger pump according to the embodiment of the present application;
fig. 3 is a schematic structural diagram of an exhaust valve 3 in an automatic air bleeding device of a plunger pump according to an embodiment of the present application.
Description of the figures
1. The device comprises a three-way pipe, 2, a gland, 3, an exhaust valve, 301, an exhaust hole, 302, a sealing groove, 303, a sealing ring, 4, a floating plug, 401, a floating body, 402, a plugging body, 5, an anti-drop cover, 6, an exhaust pipe, 7 and a control valve.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples consistent with certain aspects of the present application, as detailed in the appended claims.
The embodiment of the application provides an automatic air bleeder of plunger pump import, as shown in fig. 1, the automatic air bleeder of plunger pump import includes tee bend 1, gland 2, discharge valve 3 and unsteady blanking plug 4, and wherein, tee bend 1 includes exhaust end and two installation ends, two installation ends for install in the inlet pipe of plunger pump. The gland 2 is fixed at the exhaust end, and the gland 2 is provided with a first through hole communicated with the inside of the three-way pipe 1. One end of the exhaust valve 3 is fixed in the first through hole, the exhaust valve 3 is provided with a second through hole communicated with the first through hole, the side wall of the exhaust valve 3 is provided with an exhaust hole 301, and two ends of the exhaust hole 301 are respectively communicated with the second through hole and the inside of the three-way pipe 1. The floating plug 4 comprises a floating body 401 and a plugging body 402, the floating body 401 being adapted to float on the liquid in the three-way pipe 1. The blocking body 402 is slidably mounted in the second through hole, when the automatic air release device of the plunger pump inlet is in a non-air release state, the blocking body 402 blocks the air vent 301, and when the automatic air release device of the plunger pump inlet is in an air release state, the blocking body 402 does not block the air vent 301.
The three-way pipe 1 is a pipe having three ports, and is used for conveying liquid or gas. The three-way pipe 1 can be made of cast iron, cast steel, cast copper, cast aluminum and the like. The vertical port in the tee 1 is an exhaust end for gas exhaust, and the other two ports are mounting ends for mounting on an inlet pipe of a plunger pump.
The gland 2 can be a flange disc and can be made of steel. A first through hole is provided in the gland 2, and the first through hole may be provided at the center of the gland 2, and the first through hole communicates with the outside. For easy mounting and dismounting, the gland 2 may be fixedly connected to the exhaust end by means of screws or bolts. Through holes connected with the exhaust end are formed in the periphery of the disc of the gland 2, and the gland 2 can be connected with the exhaust end flange through bolts or screws.
The exhaust valve 3 is a cylindrical pipe body and is used for exhausting gas from an exhaust end. Two exhaust holes 301 may be symmetrically drilled in the sidewall of the exhaust valve 3, and gas may enter the inside of the exhaust valve 3 through the exhaust holes 301, thereby exhausting gas along the first through hole through the second through hole.
The floating plug 4 may include a floating body 401 and an occluding body 402, the floating body 401 may be a hollow floating ball, and the occluding body 402 may be a smooth tubular body. To reduce friction, the top of the body of the occluding body 402 may be chamfered. The chamfer is an inclined plane processed on the edge of the pipe body, so that the installation is convenient.
In implementation, two installation ends of the tee pipe 1 are installed in an inlet pipeline of the plunger pump, and after the plunger pump is started, liquid in the plunger pump enters the inside of the tee pipe 1. When the liquid contains gas, the gas gradually separates from the water and gradually gathers together to form large bubbles and even a gas column. Because the density of the gas is small, the gas is collected at the top of the exhaust end of the three-way pipe 1, the liquid level in the three-way pipe 1 is lowered, the floating body 401 moves downwards under the action of the gravity, the blocking body 402 is lowered, and at the moment, the exhaust hole 301 is not blocked by the blocking body 402. The gas enters the inside of the exhaust valve 3 from the exhaust hole 301, and the exhaust valve 3 has a second through hole communicating with the first through hole, so that the gas is exhausted from the second through hole to the outside through the first through hole. After the gas is completely discharged, the liquid level in the three-way pipe 1 rises, the floating body 401 moves upwards under the action of the buoyancy force, the blocking body 402 rises, and the blocking body 402 blocks the exhaust hole 301 at the moment to prevent the liquid from flowing out.
The automatic air bleeder in plunger pump import that this application embodiment provided need not frequently stop the pump gassing, has reduced the amount of labour, can realize automatic opening and close the gassing passageway, has realized the automatic gassing in plunger pump import, has realized the convenient and fast chemical control of plunger pump import gassing operation.
Optionally, in order to prevent the floating plug 4 from separating from the exhaust valve 3, the automatic air release device at the inlet of the plunger pump further comprises an anti-dropping cover 5, the anti-dropping cover 5 has a net structure, the anti-dropping cover 5 is sleeved outside the floating body 401, when the floating body 401 contacts with the anti-dropping cover 5, the blocking body 402 is located at the lower part of the exhaust hole 301, and the blocking body 402 does not separate from the second through hole.
In implementation, the anti-dropping cover 5 is a net structure, as shown in fig. 2, and fig. 2 is a top view of the anti-dropping cover 5 in the automatic air-bleeding device of the plunger pump according to the embodiment of the present application. The anti-drop cover 5 can be a net-shaped lamp cover formed by welding a flange and a steel bar, so that liquid can enter the anti-drop cover and contact the floating body 401. When the liquid level in the three-way pipe 1 descends, the floating body 401 and the blocking body 402 descend, the floating body 401 is in contact with the anti-falling cover 5 at the moment, the blocking body 402 is located at the lower part of the exhaust hole 301, and the blocking body 402 does not block the exhaust hole 301 at the moment, so that gas can enter the exhaust valve 3 from the exhaust hole 301. And at this moment, the blocking body 402 is not separated from the second through hole, so that the subsequent liquid can rise back to the blocking body 402 to enter the exhaust valve 3 to block the exhaust hole 301 again.
The automatic air bleeder of plunger pump that this application embodiment provided, through the outside suit anticreep cover 5 at floating body 401, avoid floating blanking plug 4 to move down in-process jam body 402 and break away from discharge valve 3, the jam body 402 of being convenient for realizes automatic opening and shutoff exhaust hole 301.
Alternatively, the anti-slip cover 5 may be fixed to the gland 2 for ease of installation.
In the implementation, the bottom of gland 2 can set up a plurality of internal thread shrinkage pools, and anticreep cover 5 can pass through the internal thread shrinkage pool fixed connection of bolt or screw and gland 2 bottom. As shown in fig. 2, the bottom of the gland 2 is provided with 4 female threaded recesses. Alternatively, the retaining cover 5 may be fixed to the exhaust end of the tee pipe 1 by bolts or screws.
Optionally, to prevent liquid from flowing out, the exhaust valve 3 further includes a sealing groove 302 and a sealing ring 303, the sealing groove 302 is located on a hole wall of the second through hole of the exhaust valve 3, the sealing groove 302 is located above the exhaust hole 301, and the sealing ring 303 is located in the sealing groove 302.
The sealing groove 302 may be an annular groove, and the sealing ring 303 may be an annular sealing rubber ring.
In an implementation, a sealing groove 302 may be machined on a hole wall of the second through hole of the exhaust valve 3, and the sealing ring 303 may be embedded inside the sealing groove 302. In order to make the blocking body 402 better block the exhaust hole 301, the sealing groove 302 can be arranged above the exhaust hole 301, when the liquid rises back and the floating body 401 and the blocking body 402 rise, the blocking body 402 blocks the exhaust hole 301, and the blocking body 402 passes through the sealing ring 303 to prevent the liquid from flowing out. Fig. 3 is a schematic structural view of an exhaust valve 3 in an automatic air bleeding device of a plunger pump according to an embodiment of the present disclosure, as shown in fig. 3, two sealing grooves 302 are symmetrically processed on a hole wall of the exhaust valve 3, and after plugging an exhaust hole 301, a plugging body 402 passes through a sealing ring 303.
The automatic air bleeder of plunger pump that this application embodiment provided, through processing seal groove 302 on the pore wall at discharge valve 3, the inside of seal groove 302 sets up sealing washer 301, and the jam body 402 moves upward and passes sealing washer 303 and can prevent that the jam body 402 from droing, and the shutoff effect is better.
Alternatively, to prevent the floating body 401 and the blocking body 402 from being separated, the floating plug 4 may be formed by welding the floating body 401 and the blocking body 402.
Optionally, in order to facilitate gas discharge, the automatic air release device for the inlet of the plunger pump further comprises an air release pipe 6, a first end of the air release pipe 6 is fixed in the first through hole, and a second end of the air release pipe 6 is communicated with the outside.
In implementation, the exhaust pipe 6 has a first vertical pipe, a horizontal pipe and a second vertical pipe, a first end of the first vertical channel is fixed in the first through hole, a second end of the first vertical pipe is connected with a first end of the horizontal pipe, a second end of the horizontal pipe is connected with a first end of the second vertical pipe, and when the first vertical pipe, the second vertical pipe and the horizontal pipe are connected, the first vertical pipe, the second vertical pipe and the horizontal pipe can be connected through an elbow.
Optionally, in order to avoid external pollution on the exhaust pipe 6 or excessive pressure gas ejection, the opening of the second end of the exhaust pipe 6 may be downward, i.e., the pipe orifice of the second vertical pipe may be set downward.
Alternatively, the exhaust pipe 6 may be screw-coupled to the first through hole for easy mounting and dismounting.
In implementation, the first through hole of the gland 2 is provided with an internal thread, the first end of the exhaust pipe 6 is provided with an external thread matching the internal thread, and the exhaust pipe 6 can be in threaded connection with the first through hole through the external thread.
Optionally, in order to prevent the liquid from flowing out secondarily, the automatic air release device at the inlet of the plunger pump further comprises a control valve 7, and the control valve 7 is installed on the exhaust pipe 6.
In an implementation, the control valve 7 may be fitted over the horizontal pipe of the exhaust pipe 6. When equipment breaks down or the plugging effect is not good, and liquid enters the exhaust pipe 6 through the exhaust hole 301, the control valve 7 can be closed, so that the liquid is prevented from flowing out of the exhaust pipe 6 in time.
The working process of the automatic air bleeder of plunger pump import that this application embodiment provided can be as follows:
two mounting ends of the three-way pipe 1 are mounted in an inlet pipeline of a plunger pump, the plunger pump is started, and liquid in the plunger pump enters the three-way pipe 1 through the inlet pipeline. When the liquid does not contain gas, the blocking body 402 blocks the gas vent 301. When gas gradually enters the liquid, the gas is mainly collected at the top of the exhaust end of the three-way pipe 1, the pressure inside the three-way pipe 1 is reduced, the liquid level is reduced, the floating body 401 moves downwards under the action of the gravity, and the blocking body 402 is reduced accordingly. When the blocking body 402 descends to contact with the escape prevention cover 5, the blocking body 402 does not disengage from the exhaust valve 3, and the exhaust hole 301 is in an open state at this time. The gas enters the inside of the exhaust valve 3 from the exhaust hole 301 and then enters the first through hole through the second through hole of the exhaust valve 3. Since the first end of the exhaust pipe 6 communicates with the first through hole, the gas enters the exhaust pipe 6 from the first through hole and is discharged to the outside from the second end of the exhaust pipe 6. After the gas is exhausted, the liquid level in the three-way pipe 1 rises, the floating body 401 moves upwards under the action of the floating force, the blocking body 402 also rises, and the blocking body 402 blocks the exhaust hole 301 at the moment and penetrates through the sealing ring 303 to prevent the liquid from flowing out. The control valve 7 is in an open state throughout the process.
The automatic air bleeder in plunger pump import that this application embodiment provided need not frequently stop the pump gassing, has reduced the amount of labour, can realize automatic opening and close the gassing passageway, has realized the automatic gassing in plunger pump import, has realized the convenient and fast chemical control of plunger pump import gassing operation. And, avoid the plunger pump to get into gas and cause the damage, reduced plunger pump cost of maintenance.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. An automatic air bleeder for an inlet of a plunger pump is characterized by comprising a three-way pipe (1), a gland (2), an exhaust valve (3) and a floating plug (4),
the three-way pipe (1) comprises an exhaust end and two mounting ends, and the two mounting ends are used for being mounted in an inlet pipeline of the plunger pump;
the gland (2) is fixed at the exhaust end, and a first through hole communicated with the inside of the three-way pipe (1) is formed in the gland (2);
one end of the exhaust valve (3) is fixed in the first through hole, the exhaust valve (3) is provided with a second through hole communicated with the first through hole, the side wall of the exhaust valve (3) is provided with an exhaust hole (301), and two ends of the exhaust hole (301) are respectively communicated with the second through hole and the inside of the three-way pipe (1);
the floating plug (4) comprises a floating body (401) and a plugging body (402), wherein the floating body (401) is used for floating on liquid in the three-way pipe (1);
the blocking body (402) is slidably mounted in the second through hole, when the automatic air release device of the plunger pump inlet is in a non-air-release state, the blocking body (402) blocks the air vent (301), and when the automatic air release device of the plunger pump inlet is in an air-release state, the blocking body (402) does not block the air vent (301).
2. The automatic air bleeder of plunger pump import according to claim 1, characterized in that, the automatic air bleeder of plunger pump import still includes anticreep cover (5), anticreep cover (5) have network structure, anticreep cover (5) cover is in the outside of floating body (401), when floating body (401) with anticreep cover (5) contact, jam body (402) are located the lower part of exhaust hole (301), and jam body (402) do not break away from the second through-hole.
3. The automatic air bleeder of inlet of plunger pump in accordance with claim 2, characterized in that said anti-slip cover (5) is fixed on said gland (2).
4. The automatic air bleeder of plunger pump import according to claim 1, characterized in that, the discharge valve (3) further includes a seal groove (302) and a seal ring (303), the seal groove (302) is located on the hole wall of the second through hole of the discharge valve (3), and the seal groove (302) is located above the exhaust hole (301), the seal ring (303) is located in the seal groove (302).
5. Plunger pump inlet automatic air relief device according to claim 1, characterized in that the floating plug (4) is formed by welding the floating body (401) and the blocking body (402).
6. The automatic air bleeding device for inlet of plunger pump as claimed in claim 1, wherein said floating body (401) is a hollow floating ball.
7. The automatic air bleeder of inlet of plunger pump in claim 1, characterized in that, said automatic air bleeder of inlet of plunger pump further comprises an air bleeder (6), a first end of said air bleeder (6) is fixed in said first through hole, a second end of said air bleeder (6) is communicated with the outside.
8. Plunger pump inlet automatic air bleeding device according to claim 7, characterised in that the second end of the air bleed tube (6) opens downwards.
9. The automatic air bleeding device for inlet of plunger pump as claimed in claim 7, wherein said air bleeding pipe (6) is screwed with said first through hole.
10. Plunger pump inlet auto-bleeder according to any of claims 7-9, characterized in that said plunger pump inlet auto-bleeder further comprises a control valve (7), said control valve (7) being mounted on said exhaust pipe (6).
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CN201921830591.XU CN211230803U (en) | 2019-10-28 | 2019-10-28 | Automatic air bleeder of plunger pump import |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117890210A (en) * | 2024-01-19 | 2024-04-16 | 威海德业机电制造有限公司 | Horizontal hydrostatic testing machine |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117890210A (en) * | 2024-01-19 | 2024-04-16 | 威海德业机电制造有限公司 | Horizontal hydrostatic testing machine |
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