CN207796122U - Liquid inlet and outlet valve for plunger pump, plunger pump and boiler - Google Patents
Liquid inlet and outlet valve for plunger pump, plunger pump and boiler Download PDFInfo
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- CN207796122U CN207796122U CN201721741185.7U CN201721741185U CN207796122U CN 207796122 U CN207796122 U CN 207796122U CN 201721741185 U CN201721741185 U CN 201721741185U CN 207796122 U CN207796122 U CN 207796122U
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- valve
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- core
- liquid
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- 239000007788 liquid Substances 0.000 title claims abstract description 98
- 238000007789 sealing Methods 0.000 claims abstract description 92
- 238000004891 communication Methods 0.000 claims abstract description 7
- 230000007704 transition Effects 0.000 claims description 9
- 238000013016 damping Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Magnetically Actuated Valves (AREA)
Abstract
The utility model provides a liquid inlet and outlet valve and plunger pump, boiler for plunger pump. Wherein, a liquid inlet and outlet valve for plunger pump has overflow state and the state of damming, and liquid inlet and outlet valve includes: the valve body is provided with a valve cavity, and openings communicated with the valve cavity are further formed in the two ends of the valve body; at least one part of the valve core is slidably arranged in the valve cavity, the first end of the valve core is provided with a liquid passing structure, and a sealing matching part is arranged between the first end of the valve core and the second end of the valve core; when the liquid inlet and outlet valve is in an overflowing state, the sealing matching part is separated from the inner wall of the valve cavity, so that liquid can flow in the opening, the liquid passing structure and the valve cavity; when the liquid inlet and outlet valve is in a cut-off state, the sealing matching part is in contact sealing with the inner wall of the valve cavity, so that the communication state of the openings at the two ends is cut off by the sealing matching part. The utility model provides a problem that the inlet and outlet valve among the prior art is fragile.
Description
Technical Field
The utility model relates to an oil and natural gas equipment technical field particularly, relates to a liquid inlet and outlet valve and plunger pump, boiler for plunger pump.
Background
The plunger pump of the steam injection boiler in the oil field is a positive displacement pump, the plunger is in reciprocating motion, when the plunger moves backwards, the liquid inlet valve is opened, the liquid outlet valve is closed, and the pump cavity is filled with liquid. When the plunger moves forwards, the liquid inlet valve is closed, the liquid outlet valve is opened, and liquid flows out of the pump body. The plunger pump crankshaft continuously runs for a circle, and the plunger reciprocates once, so that the continuous suction and discharge of liquid are realized.
The plunger pump liquid inlet and outlet valve structure consists of a valve seat, an elastic gasket, a valve plate, a spring and a valve cover. However, the liquid used by the steam injection boiler is purified sewage containing a certain amount of hydrogen sulfide, when the hydrogen sulfide is combined with water, electrolyte reaction is generated, and hydrogen sulfuric acid is generated by the reaction and has strong corrosion. The plunger pump can corrode and break the spring in the liquid feeding and discharging process, and the spring from one time to the second time needs to be replaced in one maintenance period (1200h), so that the flow of the plunger pump is reduced, the running time rate of the plunger pump is influenced, and the labor intensity of workers is increased.
Therefore, the prior art has the problem that the liquid inlet and outlet valve is easy to damage due to the easy damage of the spring.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a liquid inlet and outlet valve and plunger pump, boiler for the plunger pump to solve the fragile problem of liquid inlet and outlet valve among the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided a liquid inlet and outlet valve for a plunger pump, the liquid inlet and outlet valve having an overcurrent state and a shutoff state, the liquid inlet and outlet valve comprising: the valve body is provided with a valve cavity, and openings communicated with the valve cavity are further formed in the two ends of the valve body; at least one part of the valve core is slidably arranged in the valve cavity, the first end of the valve core is provided with a liquid passing structure, and a sealing matching part is arranged between the first end of the valve core and the second end of the valve core; when the liquid inlet and outlet valve is in an overflowing state, the sealing matching part is separated from the inner wall of the valve cavity, so that liquid can flow in the opening, the liquid passing structure and the valve cavity; when the liquid inlet and outlet valve is in a cut-off state, the sealing matching part is in contact sealing with the inner wall of the valve cavity, so that the communication state of the openings at the two ends is cut off by the sealing matching part.
Furthermore, the sealing matching part is a conical sealing matching surface on the valve core, the valve body is provided with a sealing ring wall protruding towards the center of the valve body, and when the liquid inlet and outlet valve is in an overflowing state, the conical sealing matching surface is separated from the sealing ring wall; when the liquid inlet and outlet valve is in a shutoff state, the conical sealing matching surface is in contact sealing with the sealing ring wall.
Further, the valve body includes: a valve seat having a first opening; the valve cover is connected with the valve seat and forms a valve cavity between the valve seat and the valve cover, and the valve cover is provided with a second opening.
Further, the valve seat is clamped and locked with the valve cover.
Furthermore, the valve seat is cylindrical, a central hole of the valve seat forms a part of the valve cavity, and the central hole is a stepped hole to form a sealing annular wall at the reducing position.
Further, the case includes first direction section and sealed section, and first direction section and the inner wall sliding fit of disk seat, and cross the liquid structure and set up on first direction section, and the sealed fitting surface of toper sets up in sealed section department, and the path end of the sealed fitting surface of toper sets up towards first direction section.
Furthermore, the valve core also comprises a second guide section, and the second guide section is positioned at the first end of the sealing section, which is far away from the first guide section; the valve cover also comprises a guide hole, and the second guide section extends out of the valve cavity from the inside of the guide hole.
Further, the liquid passing structure is a plurality of liquid passing holes arranged on the first guide section.
Further, the valve core also comprises a transition section, and the first guide section and the sealing section are connected through the transition section.
Further, one end of the valve core, which faces the valve cover, is provided with a damping structure.
Further, the valve core has a recess for mounting a shock absorbing structure, at least a portion of which protrudes out of a notch of the recess.
Further, the valve cover is provided with a first anti-thrust structure, the valve core is provided with a second anti-thrust structure, and when the first anti-thrust structure is in contact with the second anti-thrust structure, the valve core moves to the limit position towards one side of the valve cover.
Further, the first thrust structure is a first thrust surface of the valve cover, and the second thrust structure is a second thrust surface of the valve core.
Further, the valve seat and the valve cover are coaxially arranged.
According to another aspect of the present invention, there is provided a plunger pump including the above liquid inlet and outlet valve.
According to another aspect of the present invention, there is provided a boiler comprising the above-mentioned plunger pump.
Use the technical scheme of the utility model for the liquid inlet and outlet valve of plunger pump has the state of overflowing and the state of damming, and the liquid inlet and outlet valve includes: the valve body is provided with a valve cavity, and openings communicated with the valve cavity are further formed in the two ends of the valve body; at least one part of the valve core is slidably arranged in the valve cavity, the first end of the valve core is provided with a liquid passing structure, and a sealing matching part is arranged between the first end of the valve core and the second end of the valve core; when the liquid inlet and outlet valve is in an overflowing state, the sealing matching part is separated from the inner wall of the valve cavity, so that liquid can flow in the opening, the liquid passing structure and the valve cavity; when the liquid inlet and outlet valve is in a cut-off state, the sealing matching part is in contact sealing with the inner wall of the valve cavity, so that the communication state of the openings at the two ends is cut off by the sealing matching part.
The liquid inlet and outlet valve has two working states, namely an overflowing state and a flow stopping state, the valve core is separated from and in contact sealing with the inner wall of the valve cavity at the sealing matching part, when in the overflowing state, the valve core integrally moves upwards, the sealing matching part is separated from the inner wall of the valve cavity, liquid enters from the lower end opening of the valve body, then flows into the valve cavity through the liquid passing structure, and finally flows out through the upper end opening of the liquid; when in the intercepting state, the valve core moves downwards integrally, the sealing matching part is in contact sealing with the inner wall of the valve cavity, and the communication state of the openings at the two ends of the valve body is cut off by the sealing matching part to prevent liquid from flowing in the valve cavity.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a cross-sectional view of a liquid inlet and outlet valve for a plunger pump according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a valve body; 11. a valve cavity; 12. a sealing annular wall; 13. a valve seat; 131. a central bore; 14. a valve cover; 141. a first thrust structure; 20. a valve core; 21. a liquid passing structure; 22. a seal-fit portion; 23. a first guide section; 24. a transition section; 25. a recess; 26. a second thrust structure; 27. a second guide section; 30. a locking structure; 40. a shock-absorbing structure; 50. and (4) a guide hole.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
In order to solve the problem that the spring is fragile among the prior art, the utility model provides a liquid inlet and outlet valve and plunger pump, boiler for the plunger pump. The plunger pump has a liquid inlet and outlet valve described below, and the boiler has a plunger pump described below.
As shown in fig. 1, the liquid inlet and outlet valve has an overflowing state and a shut-off state, and includes: the valve comprises a valve body 10 and a valve core 20, wherein the valve body 10 is provided with a valve cavity 11, and openings communicated with the valve cavity 11 are further arranged at two ends of the valve body 10; at least one part of the valve core 20 is slidably arranged in the valve cavity 11, a first end of the valve core 20 is provided with a liquid passing structure 21, and a sealing matching part 22 is arranged between the first end of the valve core 20 and a second end of the valve core 20; when the liquid inlet and outlet valve is in an overflowing state, the sealing matching part 22 is separated from the inner wall of the valve cavity 11, so that liquid can flow in the opening, the liquid passing structure 21 and the valve cavity 11; when the liquid inlet and outlet valve is in a shut-off state, the sealing matching part 22 is in contact sealing with the inner wall of the valve cavity 11, so that the communication state of the openings at the two ends is cut off by the sealing matching part 22.
The liquid inlet and outlet valve has two working states, namely an overflowing state and a shutoff state, the valve core 20 is used for realizing the separation and contact sealing of the sealing matching part 22 and the inner wall of the valve cavity 11, when in the overflowing state, the valve core 20 integrally moves upwards, the sealing matching part 22 is separated from the inner wall of the valve cavity 11, liquid enters from the lower end opening of the valve body 10, then flows into the valve cavity 11 through the liquid passing structure 21, and finally flows out through the upper end opening of the liquid; in the shut-off state, the valve element 20 moves downward as a whole, the seal fitting portion 22 contacts and seals with the inner wall of the valve chamber 11, and the communication state of the openings at both ends of the valve body 10 is blocked by the seal fitting portion 22, thereby preventing the liquid from flowing in the valve chamber 11.
Wherein, the valve core 20 is made of stainless steel material to prevent rusting.
In the embodiment shown in fig. 1, the sealing engagement portion 22 is a conical sealing engagement surface on the valve core 20, and the valve body 10 has a sealing annular wall 12 protruding toward the center thereof, and the conical sealing engagement surface is disengaged from the sealing annular wall 12 when the valve is in an overflowing state; when the liquid inlet and outlet valve is in a shut-off state, the conical sealing matching surface is in contact sealing with the sealing annular wall 12.
Through the separation and the contact between toper sealed fitting surface and the sealing ring wall 12, realize the switch function to whether control liquid discharges through valve body 10, wherein, sealed fitting surface adopts the toper structure, is convenient for control toper sealed fitting surface and the opening and shutting between the sealing ring wall 12, and then realizes damming better and overflowing.
As shown in fig. 1, the valve body 10 includes a valve seat 13 and a valve cover 14, the valve seat 13 having a first opening; the valve seat 13 is connected to a valve cover 14 and forms a valve chamber 11 therebetween, the valve cover 14 having a second opening. The liquid enters the valve cavity 11 through the first opening of the valve seat 13 and then is discharged through the second opening of the valve cover 14, so that liquid inlet and liquid outlet are completed.
Alternatively, the second opening is plural, and the second openings are spaced around the circumference of the valve cover 14, so that the valve cover 14 has a skeleton-shaped structure.
In the embodiment shown in fig. 1, the valve seat 13 is snap-locked to the valve cover 14. The clamping locking mode is simple and convenient to install and low in cost.
Specifically, a locking structure 30 is arranged between the valve seat 13 and the valve cover 14, so that the valve seat 13 and the valve cover 14 are locked in a clamping manner.
As shown in fig. 1, the valve seat 13 is cylindrical, and the central hole 131 of the valve seat 13 forms a part of the valve chamber 11, and the central hole 131 is a stepped hole to form the sealing annular wall 12 at the reducing part. Tubular structure and the corresponding setting of toper seal fitting surface, during damming, sealed effect is better, and in addition, centre bore 131 can regard as the pipeline of liquid circulation, moreover, adopts the notch cuttype to be favorable to forming sealed rampart 12 in reducing department on the one hand, and on the other hand is favorable to the flow of liquid.
As shown in fig. 1, the valve core 20 includes a first guiding section 23 and a sealing section, the first guiding section 23 is slidably engaged with the inner wall of the valve seat 13, the liquid passing structure 21 is disposed on the first guiding section 23, the tapered sealing engagement surface is disposed at the sealing section, and the small diameter end of the tapered sealing engagement surface faces the first guiding section 23. First direction section 23 plays the effect of water conservancy diversion as the passageway of liquid inflow centre bore 131, and in addition, the path end of the sealed fitting surface of toper sets up towards first direction section 23, can seal more conveniently, reaches the better effect of damming.
As shown in fig. 1, the valve core 20 further includes a second guide section 27, and the second guide section 27 is located at a first end of the sealing section far from the first guide section 23; the valve cover 14 further comprises a guide hole 50, and the second guide section 27 extends from the inside of the guide hole 50 to the outside of the valve chamber 11. When the liquid inlet and outlet valve is in an overflowing state, the conical sealing matching surface is separated from the sealing annular wall 12, the valve core 20 moves towards the valve cover 14, and the guide hole 50 plays a role in guiding the second guide section 27. Thus, when the liquid pushes the valve core 20, the second guide section 27 is always located in the guide hole 50, so that the valve core 20 can be effectively prevented from being inclined, the valve core 20 is prevented from being stuck in the valve body 10, and the smoothness of the movement of the valve core 20 is improved.
As shown in fig. 1, the liquid passing structure 21 is a plurality of liquid passing holes disposed on the first guide section 23. The liquid passing holes are liquid flowing channels, and the liquid passing holes are arranged in the circumferential direction of the valve seat 13 at intervals, so that shunting is facilitated, pressure intensity is reduced, and reliability is improved.
Optionally, the number of the liquid passing holes is four, and the liquid passing holes are arranged at intervals in the circumferential direction of the valve seat 13.
As shown in fig. 1, the valve core 20 further includes a transition section 24, and the first guide section 23 and the sealing section are connected by the transition section 24. First, the transition section 24 plays a role of connection, and in addition, due to the arrangement of the transition section 24, the flow of liquid is smoother, thereby increasing the working efficiency.
As shown in fig. 1, a damping structure 40 is provided at an end of the valve core 20 facing the bonnet 14. When the liquid inlet and outlet valve is in an overflowing state, the conical sealing matching surface is separated from the sealing annular wall 12, the valve core 20 moves towards the valve cover 14, the valve core 20 collides with the valve cover 14, and the damping structure 40 can reduce damage to the valve core 20 and the valve cover 14 caused by collision and plays a role in protection.
As shown in fig. 1, the valve core 20 has a recess 25 for mounting the shock-absorbing structure 40, and at least a portion of the shock-absorbing structure 40 protrudes from a notch of the recess 25. When the valve core 20 collides with the valve cover 14, the shock absorption structure 40 can well protect the valve core 20 and the valve cover 14 from being damaged due to collision, and in addition, at least one part of the shock absorption structure 40 protrudes out of the notch of the concave part 25, so that the valve cover 14 can be prevented from directly colliding with the concave part 25 of the valve core 20, and the valve core 20 is protected.
As shown in fig. 1, the valve cover 14 has a first thrust structure 141, and the valve core 20 has a second thrust structure 26, and when the first thrust structure 141 contacts the second thrust structure 26, the valve core 20 moves to an extreme position toward the side of the valve cover 14. When the liquid inlet and outlet valve is in an overflowing state, the conical sealing matching surface is separated from the sealing annular wall 12, the valve core 20 moves towards the valve cover 14, and the valve cover 14 and the valve core 20 are respectively provided with the first anti-thrust structure 141 and the second anti-thrust structure 26, so that the movement of the valve core 20 can be positioned, the valve core 20 can be prevented from being separated from the valve seat 13, and overflowing and intercepting can be controlled better.
In addition, the top of the bonnet 14 and the damping structure 40 of the recess 25 of the valve spool 20 may serve as a third and fourth thrust structure, respectively, to position the movement of the valve spool 20.
As shown in fig. 1, the first thrust structure 141 is a first thrust surface of the valve cover 14, and the second thrust structure 26 is a second thrust surface of the valve core 20. Through the collision contact between first thrust surface and the second thrust surface, can realize the location to case 20 motion, and the area of contact between the face is great, can disperse the power, prevents to cause the damage to certain point of case 20 and valve gap 14 because of the too big power that produces when colliding.
As shown in fig. 1, the valve seat 13 is disposed coaxially with the valve cover 14. The valve core 20 moves in the valve cavity 11 enclosed by the valve seat 13 and the valve cover 14, and the coaxial arrangement is favorable for the movement of the valve core 20, even if the separation and contact sealing of the conical sealing matching surface and the sealing annular wall 12 are controlled, better overflowing and intercepting effects are achieved.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
1. a spring device is omitted, the problem that the spring is frequently broken is solved, the working efficiency of the boiler is improved, and the labor force of workers due to frequent replacement of the spring is reduced;
2. the contact sealing mode of the conical sealing matching surface and the sealing ring wall is adopted for sealing, and the sealing effect is better.
It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. A valve for use in a plunger pump, the valve having an over-flow condition and a shut-off condition, the valve comprising:
the valve body (10), the valve body (10) has valve cavities (11), and both ends of the valve body (10) are also provided with openings communicated with the valve cavities (11);
the valve core (20), at least a part of the valve core (20) is arranged in the valve cavity (11) in a sliding way, a first end of the valve core (20) is provided with a liquid passing structure (21), and a sealing matching part (22) is arranged between the first end of the valve core (20) and a second end of the valve core (20); wherein,
when the liquid inlet and outlet valve is in the overflowing state, the sealing matching part (22) is separated from the inner wall of the valve cavity (11) so that liquid can flow in the opening, the liquid passing structure (21) and the valve cavity (11);
when the liquid inlet and outlet valve is in the intercepting state, the sealing matching part (22) is in contact sealing with the inner wall of the valve cavity (11), so that the communication state of the openings at the two ends is cut off by the sealing matching part (22).
2. The valve according to claim 1, wherein the sealing engagement portion (22) is a tapered sealing engagement surface on the valve body (20), the valve body (10) having a sealing annular wall (12) protruding toward a center thereof, the tapered sealing engagement surface being disengaged from the sealing annular wall (12) when the valve is in the overflow condition; when the liquid inlet and outlet valve is in the intercepting state, the conical sealing matching surface is in contact sealing with the sealing annular wall (12).
3. The intake/discharge valve according to claim 2, characterized in that said valve body (10) comprises:
a valve seat (13), said valve seat (13) having a first of said openings;
a valve cover (14), said valve seat (13) being connected to said valve cover (14) and forming said valve chamber (11) therebetween, said valve cover (14) having a second of said openings.
4. A valve according to claim 3, characterized in that said valve seat (13) is snap-locked with said valve cover (14).
5. The valve according to claim 3, characterized in that the valve seat (13) is cylindrical and the central hole (131) of the valve seat (13) forms part of the valve chamber (11), and the central hole (131) is a stepped hole to form the sealing ring wall (12) at the reducing point.
6. The drain-inlet valve according to claim 3, characterized in that the valve core (20) comprises a first guiding section (23) and a sealing section, the first guiding section (23) is slidably fitted with the inner wall of the valve seat (13), the liquid passing structure (21) is arranged on the first guiding section (23), the conical sealing fitting surface is arranged at the sealing section, and the small diameter end of the conical sealing fitting surface is arranged towards the first guiding section (23).
7. The drain and inlet valve according to claim 6, characterized in that the valve spool (20) further comprises a second guiding section (27), the second guiding section (27) being located at a first end of the sealing section remote from the first guiding section (23); the valve cover (14) further comprises a guide hole (50), and the second guide section (27) extends out of the valve cavity (11) from the inside of the guide hole (50).
8. The valve according to claim 6, characterized in that said liquid passing structure (21) is a plurality of liquid passing holes provided on said first guiding section (23).
9. The valve according to claim 6, wherein the valve spool (20) further comprises a transition section (24), and the first guiding section (23) and the sealing section are connected through the transition section (24).
10. The valve according to claim 3, characterized in that the valve core (20) is provided with a shock-absorbing structure (40) at its end facing the valve cover (14).
11. The valve according to claim 10, characterized in that the valve core (20) has a recess (25) for mounting the damping structure (40), at least a part of the damping structure (40) protruding out of the recess (25).
12. The valve for liquid inlet and outlet according to claim 3, characterized in that the valve cover (14) has a first thrust structure (141), and the valve core (20) has a second thrust structure (26), and when the first thrust structure (141) is in contact with the second thrust structure (26), the valve core (20) moves to an extreme position toward the side of the valve cover (14).
13. The valve according to claim 12, wherein the first thrust structure (141) is a first thrust surface of the valve cover (14), and the second thrust structure (26) is a second thrust surface of the valve core (20).
14. A liquid inlet and outlet valve according to claim 3, characterised in that the valve seat (13) is arranged coaxially with the valve cover (14).
15. A plunger pump comprising the liquid inlet/outlet valve as claimed in any one of claims 1 to 14.
16. A boiler comprising a plunger pump according to claim 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721741185.7U CN207796122U (en) | 2017-12-13 | 2017-12-13 | Liquid inlet and outlet valve for plunger pump, plunger pump and boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721741185.7U CN207796122U (en) | 2017-12-13 | 2017-12-13 | Liquid inlet and outlet valve for plunger pump, plunger pump and boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207796122U true CN207796122U (en) | 2018-08-31 |
Family
ID=63283853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721741185.7U Active CN207796122U (en) | 2017-12-13 | 2017-12-13 | Liquid inlet and outlet valve for plunger pump, plunger pump and boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207796122U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111449958A (en) * | 2020-04-29 | 2020-07-28 | 国药控股星鲨制药（厦门）有限公司 | Feeding device for dropping pills |
-
2017
- 2017-12-13 CN CN201721741185.7U patent/CN207796122U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111449958A (en) * | 2020-04-29 | 2020-07-28 | 国药控股星鲨制药（厦门）有限公司 | Feeding device for dropping pills |
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