Plunger pump one-way valve mounting structure and plunger pump

Abstract

The utility model relates to the field of fluid machinery, in particular to a plunger pump one-way valve mounting structure and a plunger pump, the mounting structure comprises a cylinder head, and a water inlet runner and a water outlet runner of the plunger pump are both arranged on the cylinder head; the cylinder head is provided with at least one mounting channel; each one-way valve group comprises two one-way valves; the gland is used for pressing the one-way valve set in the first direction and arranged on the cylinder head, and at least part of the gland is located at the disassembly and assembly end of the installation channel. In the assembled state, the two one-way valves in each one-way valve set are plugged into the corresponding installation channel in the first direction and are mutually stacked and pressed, and the two one-way valves are pressed between the gland and the abutting face in the first direction under pressing of the gland. The water inlet end of the first one-way valve is communicated with the water inlet runner, and the water outlet end of the second one-way valve is communicated with the water outlet runner; the water outlet end of the first one-way valve is communicated with the water inlet end of the second one-way valve; therefore, only one gland is needed to simultaneously press the two one-way valves, and installation can be simplified.

Description

Technical Field

[0001] The present application relates to the field of fluid machinery, and in particular to a plunger pump one-way valve installation structure and a plunger pump. Background Art

[0002] A plunger pump is a fluid pump that is mainly driven by the reciprocating action of a plunger to pump liquid. A one-way valve is generally required in the cylinder head of the plunger pump to cooperate with the plunger to complete the water pumping action.

[0003] Its one-way valve is generally mainly composed of a valve seat, a valve cover and a valve core assembly arranged between the valve seat and the valve cover; for a plunger pump, at least one set of one-way valves needs to be set in its cylinder head, and a set of one-way valves includes two one-way valves, one for controlling one-way water inlet and the other for controlling one-way water outlet; currently, when installing a one-way valve in a plunger pump, two installation channels are usually set to install the two one-way valves respectively. After the one-way valve is inserted into the installation channel, a pressure cover is set on the cylinder head to tighten the valve cover of the one-way valve, so that the valve cover presses the valve core assembly between the valve cover and the valve seat; in this way, each one-way valve needs to be provided with a corresponding pressure cover, which is relatively cumbersome to install and thus needs to be improved. Utility Model Content

[0004] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present application is to provide a plunger pump one-way valve installation structure and a plunger pump.

[0005] To achieve the above objectives, this application provides the following technical solutions.

[0006] On the one hand, the utility model provides a plunger pump one-way valve installation structure, comprising:

[0007] A cylinder head, wherein the water inlet and outlet channels of the plunger pump are both provided on the cylinder head; the cylinder head is provided with at least one mounting channel, the mounting channel extending along a first direction; one end of the mounting channel is open to form a disassembly end, and the other end forms an abutment surface;

[0008] At least one one-way valve group, each one-way valve group includes two one-way valves, namely a first one-way valve and a second one-way valve; one one-way valve group is installed corresponding to each installation channel; the one-way valve includes a water inlet end and a water outlet end;

[0009] The pressure cover is used to compress the one-way valve group along the first direction. It is provided on the cylinder head and is at least partially located at the disassembly end of the installation channel. In the assembled state, the two one-way valves in each one-way valve group are inserted into the installation channel along the first direction and overlapped with each other. Under the pressure of the pressure cover, the two one-way valves are compressed between the pressure cover and the abutment surface along the first direction. The water inlet end of the first one-way valve is connected to the water inlet channel, and the water outlet end of the second one-way valve is connected to the water outlet channel. The water outlet end of the first one-way valve is connected to the water inlet end of the second one-way valve.

[0010] As an optional embodiment of the present application, the water inlet and water outlet of the first one-way valve both extend along the first direction; the water inlet of the second one-way valve extends along the first direction; in the assembled state, the water outlet of the first one-way valve and the water inlet of the second one-way valve are coaxially connected.

[0011] As an optional embodiment of the present application, the one-way valve includes a valve seat, a valve cover and a valve core assembly, the valve seat and the valve cover are connected to each other along a first direction, and the valve core is arranged between the valve seat and the valve cover; the valve core assembly includes a ball, a pressure cap and a spring; an installation cavity for installing the valve core assembly is provided between the valve seat and the valve body; the ball and the pressure cap are both capable of moving in the installation cavity along the first direction; the spring is arranged along the first direction, one end of which is against the end wall of the installation cavity, and the other end is against the pressure cap, and the ball is pressed against the water inlet port of the one-way valve by the pressure cap.

[0012] As an optional embodiment of the present application, the valve seat and the valve cover end are detachably connected by a flexible copper wire; wherein, at the opposite ends of the valve seat and the valve cover, one of them has a circumferential first arc groove on the outer peripheral wall, and the other has a circumferential second arc groove on the inner peripheral wall; when the valve seat and the valve cover are connected to each other, the first arc groove and the second arc groove form a complete annular channel; the annular channel is provided with an incision for the copper wire to pass through, and in the assembled state, the copper wire passes through the incision into the annular channel to connect the valve cover and the valve seat together

[0013] As an optional embodiment of the present application, a first sealing ring is provided between the butt ends of the first one-way valve and the second one-way valve; and / or a second sealing ring is provided between an end portion of the first one-way valve away from the second one-way valve and the abutting surface; and / or a third sealing ring is provided between the outer peripheral wall of the second one-way valve and the peripheral wall of the installation channel.

[0014] As an optional embodiment of the present application, the pressure cover is detachably mounted on the cylinder head. For example, the pressure cover is connected to the cylinder head via bolts.

[0015] As an optional embodiment of the present application, the second one-way valve is provided with a bulge at one end away from the first one-way valve; and the side surface of the pressure cover facing the cylinder head is provided with an avoidance hole corresponding to the position of the bulge that can accommodate the bulge.

[0016] As an optional implementation of the present application, the protrusion is provided with a threaded hole extending along the first direction.

[0017] As an optional embodiment of the present application, the water inlet channel and the water outlet channel both extend along a second direction, wherein the first direction is perpendicular to the second direction.

[0018] On the other hand, the present application also provides a plunger pump, comprising a pump body and a cylinder head, wherein the cylinder head is provided with a one-way valve, characterized in that the one-way valve is installed in the cylinder head using the above-mentioned plunger pump one-way valve installation structure.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] In the present application, the two one-way valves in the same one-way valve group are assembled in the same installation channel along the same direction (ie, the first direction), so only one gland is needed to simultaneously press the two one-way valves, thereby simplifying the installation.

[0021] Especially when there are multiple one-way valve groups, all the one-way valve groups can be compressed and assembled through the same pressure cover, which also simplifies the installation steps.

[0022] In addition, in this solution, the installation channel extends along the first direction, so it basically presents a linear channel structure, which makes it easy to process and shape the installation channel.

[0023] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an illustrative and non-limiting manner, in which:

[0025] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0026] Figure 1 Schematic diagram of the plunger pump structure provided for this application;

[0027] Figure 2 for Figure 1 Exploded diagram;

[0028] Figure 3 This is a cross-sectional view of the cylinder head of this application;

[0029] Figure 4 This is a structural diagram of the one-way valve group of this application;

[0030] Figure 5 This is a structural diagram of the first one-way valve of this application;

[0031] Figure 6 This is a cross-sectional view of the first one-way valve of the present application.

[0032] Description of the numbers in the figure:

[0033] X, first direction; Y, second direction; M, one-way valve group; M1, first one-way valve; M2, second one-way valve

[0034] 1. Cylinder head; 11. Installation channel; 111. Disassembly end; 112. Abutment surface; 12. Water inlet channel; 13. Water outlet channel;

[0035] 21. Valve seat; 211. First arcuate groove; 212. Notch; 211. First flow channel; 22. Valve cover; 221. Second flow channel; 222. Third flow channel; 223. Second arcuate groove; 224. Protrusion; 225. Threaded hole; 23. Valve core assembly; 231. Spring; 232. Press cap; 233. Ball; 24. Annular channel;

[0036] 31. First sealing ring; 32. Second sealing ring; 33. Third sealing ring;

[0037] 4. Gland; 41. Avoidance hole;

[0038] 5. Bolts;

[0039] 6. Pump body. DETAILED DESCRIPTION

[0040] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0041] Example 1

[0042] See also Figure 1-6 As shown, this embodiment provides a one-way valve installation structure for a plunger pump, including a cylinder head 1, at least one one-way valve group M, and a gland 4.

[0043] The plunger pump is provided with an inlet channel 12 and an outlet channel 13. When working, the plunger of the plunger pump drives the axial reciprocating motion of the plunger to drive the inlet channel 12 to absorb water and the outlet channel 13 to discharge water. That is to say, the inlet channel 12 is equivalent to the water inlet side of the plunger pump, and the outlet channel 13 is equivalent to the water outlet side of the plunger pump.

[0044] The water inlet channel 12 and the water outlet channel 13 of the plunger pump are both provided on the cylinder head 1. Figure 3 As shown, in some embodiments, the water inlet channel 12 and the water outlet channel 13 are parallel to each other and both extend along the second direction Y.

[0045] At least one mounting channel 11 is provided on the cylinder head 1. It can be understood that the mounting channel 11 mainly serves as the mounting channel 11 of the one-way valve group M. The number of the mounting channel 11 is the same as the number of the one-way valve group M. One mounting channel 11 corresponds to the installation of one one-way valve group M.

[0046] For example, Figure 3 As shown, this embodiment shows a situation where three groups of installation channels 11 are used to correspond to three one-way valve groups M; wherein the installation channels 11 all extend along a first direction X; the first direction X is perpendicular to the second direction Y. If the first direction X is recorded as vertical, the second direction Y can be understood as horizontal.

[0047] One end of the installation channel 11 is open to form a disassembly end 111, and the other end forms an abutment surface 112. For example, the upper end of the installation channel 11 is open to form the disassembly end 111, which serves as a port for the one-way valve group M to enter / exit the installation channel 11; the other end of the installation channel 11 forms a plane as an abutment surface 112 for the one-way valve to abut.

[0048] Each one-way valve group M includes two one-way valves. To distinguish them, the two one-way valves in the same one-way valve group M are respectively recorded as the first one-way valve M1 and the second one-way valve M2. In this embodiment, Figure 3 As shown, the upper one-way valve is marked as the second one-way valve M2, and the lower one is marked as the first one-way valve M1.

[0049] In this embodiment, each one-way valve includes an inlet end and an outlet end. It is worth noting that the inlet end and the outlet end here can be understood as the one-way valve being constructed to allow fluid to flow from the inlet end to the outlet end in only one direction, and to cut off the reverse flow.

[0050] In some embodiments, all one-way valves have substantially the same basic structure, and are all ball-core one-way valves. That is, the specific structure of the one-way valve is as follows:

[0051] like Figure 4 As shown, the one-way valve includes a valve seat 21, a valve cover 22 and a valve core assembly 23. The valve seat 21 and the valve cover 22 are connected to each other along the first direction X, that is, the ends of the valve seat 21 and the valve cover 22 are connected; the valve core assembly 23 is arranged between the valve seat 21 and the valve cover 22.

[0052] The valve core assembly 23 includes a ball 233, a pressure cap 232 and a spring 231; an installation cavity for installing the valve core assembly 23 is provided between the valve seat 21 and the valve body, wherein the installation cavity is mainly provided in the valve cover 22 and basically extends along the first direction X.

[0053] The sphere 233 and the pressure cap 232 can both move in the installation cavity along the first direction X; Figure 6As shown, the spring 231 is arranged along the first direction X, one end of which is against the end wall of the installation cavity, and the other end is against the pressure cap 232. The end surface of the pressure cap 232 away from the spring 231 is provided with an arc-shaped groove adapted to the ball 233 for partial access of the ball 233; in the assembled state, the spring 231 provides an elastic force to push the pressure cap 232 and the ball 233 toward the side close to the valve seat 21 until the ball 233 is pressed against the water inlet port of the one-way valve, thereby closing the water inlet port of the one-way valve; in this way, in the absence of external force, the water inlet end of the one-way valve is blocked by the ball 233; when a fluid of a certain pressure is injected into the water inlet end, under the pressure of the fluid, the ball 233 and the pressure cap 232 overcome the elastic force of the spring 231 and move toward the port away from the water inlet end, thereby opening the water inlet end to achieve normal water inlet.

[0054] As for the specific formation of the water inlet and outlet of the one-way valve, Figure 6 As shown, a first flow channel 211 extending along the first direction X is defined on the valve seat 21 , and one or more second flow channels 221 are defined on the peripheral wall of the valve cover 22 .

[0055] like Figure 3 As shown, in the first one-way valve M1, the first flow channel 211 of the first one-way valve M1 constitutes the water inlet of the first one-way valve M1. In addition, a third flow channel 222 extending along the first direction X is defined at the top of the first one-way valve M1. The third flow channel 222 constitutes the water outlet of the first one-way valve M1. The second flow channel 221 of the first one-way valve M1 is connected to the plunger chamber of the plunger pump (not shown in the figure due to viewing angles).

[0056] like Figure 3 As shown, in the second one-way valve M2, the first flow channel 211 of the second one-way valve M2 constitutes the water inlet end of the second one-way valve M2, and the second flow channel 221 of the second one-way valve M2 constitutes the water outlet end of the second one-way valve M2, which is connected to the water outlet flow channel 13.

[0057] In order to open the one-way valve and disassemble the valve core assembly 23 inside it, in some embodiments, the ends of the valve seat 21 and the valve cover 22 are detachably connected. Specifically:

[0058] The ends of the valve seat 21 and the valve cover 22 are detachably connected by a flexible copper wire. Figure 4 As shown, at the opposite ends of the valve seat 21 and the valve cover 22, a first arcuate groove 211 is provided on the outer peripheral wall of one of them, and a second arcuate groove 223 is provided on the inner peripheral wall of the other; the cross sections of the first arcuate groove 211 and the second arcuate groove 223 are both semicircular; Figure 6As shown, when the valve seat 21 and the valve cover 22 are docked with each other, the first arcuate groove 211 and the second arcuate groove 223 enclose and form a complete annular channel 24; the cross-section of this annular channel 24 is circular, which means that the first arcuate groove 211 and the second arcuate groove 223 are both half of the annular channel 24.

[0059] For example, Figure 4 As shown, a first arcuate groove 211 surrounding the valve seat 21 is formed on the inner peripheral wall of the end portion of the valve seat 21, and a protruding portion of the end portion of the valve cover 22 is inserted into the valve seat 21 along the first direction X, and a second arcuate groove 223 surrounding the valve cover 22 is formed on the outer peripheral wall of the protruding portion.

[0060] In addition, if Figure 4 As shown, the annular channel 24 is provided with a cutout 212 for the copper wire (not shown in the figure, the cross section of the copper wire is circular) to pass through. For example, the cutout 212 can be opened on the outer peripheral wall of the end of the valve seat 21; when assembling, the protruding portion of the valve cover 22 is inserted into the valve seat 21. At this time, as shown in FIG. Figure 6 As shown, the first arcuate groove 211 and the second arcuate groove 223 together form an annular channel 24; then, the copper wire is passed through the incision 212 and continuously inserted into the annular channel 24, so that the copper wire travels along the annular channel 24 until it circles around a circle; in this way, after the copper wire is inserted, under the restriction of the copper wire, the valve seat 21 and the valve cover 22 cannot axially separate from each other, thereby realizing the connection between the valve cover 22 and the valve seat 21.

[0061] Of course, in some other optional embodiments, the detachable connection between the valve cover 22 and the valve seat 21 may also be that the two are connected to each other by screws, or the ends of the two are threadedly connected together.

[0062] In this embodiment, Figure 3 As shown, the pressure cover 4 is mainly used to compress the one-way valve group M along the first direction X. It is arranged on the cylinder head 1 and is at least partially located at the disassembly end 111 of the installation channel 11; for example, in this embodiment, the pressure cover 4 is basically a block structure and is installed at the upper end of the cylinder head 1.

[0063] In some embodiments, in order to be able to remove the gland 4, the gland 4 is preferably mounted on the cylinder head 1 in a detachable manner, for example, Figure 2 As shown, the gland 4 is connected to the cylinder head 1 by bolts 5. Specifically, a through hole extending along the first direction X is provided on the gland 4, and a screw hole extending along the first direction X is provided at a position corresponding to the through hole on the cylinder head 1. During assembly, the bolt 5 passes through the through hole and is threadedly connected to the screw hole to achieve the connection between the gland 4 and the cylinder head 1.

[0064] When assembling the check valve, Figure 3As shown, the two one-way valves in each one-way valve group M are inserted into the installation channel 11 along the first direction X and overlap each other, with the first one-way valve M1 at the bottom and the second one-way valve M2 at the top, and the ends of the two one-way valves are butted against each other; then the gland 4 is installed on the cylinder head 1, and the bolts 5 are continuously tightened, so that the gland 4 continuously squeezes the two one-way valves downward, and finally, the lower end of the first one-way valve M1 is pressed against the abutment surface 112, and the upper end of the second one-way valve M2 is pressed by the gland 4. In this way, the two one-way valves are pressed between the gland 4 and the abutment surface 112 along the first direction X to achieve assembly.

[0065] It is worth noting that in the assembled state:

[0066] like Figure 3 As shown, the water inlet end of the first one-way valve M1 is connected to the water inlet channel 12, that is, the first channel 211 of the first one-way valve M1 is connected to the water inlet channel 12;

[0067] The water outlet of the second one-way valve M2 is connected to the water outlet channel 13, that is, the second channel 221 of the second one-way valve M2 is connected to the water outlet channel 13; and the water outlet of the first one-way valve M1 is connected to the water inlet of the second one-way valve M2, that is, the third channel 222 of the first one-way valve M1 is coaxially connected and connected to the first channel 211 of the second one-way valve M2. In this way, when the plunger pump pumps water, water enters from the water inlet channel 12, flows through the first channel 211 of the first one-way valve M1, the third channel 222 of the first one-way valve M1, the first channel 211 of the second one-way valve M2, the second channel 221 of the second one-way valve M2, the water outlet channel 13, and finally flows out from the water outlet channel 13.

[0068] In order to improve the sealing performance between the first one-way valve M1 and the second one-way valve M2, Figure 3 As shown, a first sealing ring 31 is provided between the butt ends of the first one-way valve M1 and the second one-way valve M2, and the first sealing ring 31 is pressed tightly between the butt ends of the two one-way valves.

[0069] In order to improve the sealing between the end of the first one-way valve M1 and the abutment surface 112, a second sealing ring 32 is provided between the end of the first one-way valve M1 away from the second one-way valve M2 and the abutment surface 112. The second sealing ring 32 is pressed between the abutment surface 112 and the end of the first one-way valve M1.

[0070] Similarly, in order to improve the sealing between the outer peripheral wall of the second one-way valve M2 and the peripheral wall of the installation channel 11, a third sealing ring 33 is provided between the outer peripheral wall of the second one-way valve M2 and the peripheral wall of the installation channel 11, and the third sealing ring 33 is pressed tightly between the outer peripheral wall of the second one-way valve M2 and the peripheral wall of the installation channel 11.

[0071] In order to facilitate the later extraction of the second one-way valve M2 from the installation channel 11, in some embodiments, such as Figure 4 As shown, the second one-way valve M2 is provided with a protrusion 224 at one end away from the first one-way valve M1 (i.e., the upper end of the second one-way valve M2). In the assembled state, the protrusion 224 protrudes from the upper surface of the cylinder head 1; at this time, the protrusion 224 is equivalent to providing a fulcrum for the tool to exert force; accordingly, as shown in FIG. Figure 3 As shown, in order to avoid the protrusion 224 , a side surface of the pressure cover 4 facing the cylinder head 1 is provided with a avoidance hole 41 capable of accommodating the protrusion 224 at a position corresponding to the protrusion 224 .

[0072] Because the protruding distance of the protrusion 224 is limited, the force distance is also limited; therefore, in order to better exert force, a threaded hole 225 extending along the first direction X is provided on the protrusion 224, so that when the second one-way valve M2 needs to be pulled out later, a screw compatible with the threaded hole 225 can be screwed into the threaded hole 225 to extend the force distance and facilitate better extraction of the second one-way valve M2.

[0073] Example 2

[0074] Combine Figure 1-6 As shown, this embodiment further provides a plunger pump based on Example 1, including a pump body 6 and a cylinder head 1, the cylinder head 1 is provided with at least one one-way valve group M, each one-way valve group M includes two one-way valves, namely a first one-way valve M1 and a second one-way valve M2; the cylinder head 1 is provided with a water inlet channel 12 and a water outlet channel 13.

[0075] The one-way valve is installed in the cylinder head 1 using the plunger pump one-way valve installation structure provided in Example 1. The specific installation structure has been described in detail in Example 1 and will not be repeated here. Please refer to the description of Example 1.

[0076] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. This is not a limitation herein.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0078] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. The installation structure of the one-way valve of the plunger pump is characterized by: include: A cylinder head, wherein the water inlet and outlet channels of the plunger pump are both provided on the cylinder head; the cylinder head is provided with at least one mounting channel, the mounting channel extending along a first direction; one end of the mounting channel is open to form a disassembly end, and the other end forms an abutment surface; At least one one-way valve group, each one-way valve group includes two one-way valves, namely a first one-way valve and a second one-way valve; one one-way valve group is installed corresponding to each installation channel; the one-way valve includes a water inlet end and a water outlet end; The pressure cover is used to compress the one-way valve group along the first direction. It is provided on the cylinder head and is at least partially located at the disassembly end of the installation channel. In the assembled state, the two one-way valves in each one-way valve group are inserted into the installation channel along the first direction and overlapped with each other. Under the pressure of the pressure cover, the two one-way valves are compressed between the pressure cover and the abutment surface along the first direction. The water inlet end of the first one-way valve is connected to the water inlet channel, and the water outlet end of the second one-way valve is connected to the water outlet channel. The water outlet end of the first one-way valve is connected to the water inlet end of the second one-way valve.

2. The one-way valve installation structure of the plunger pump according to claim 1, characterized in that: The water inlet and outlet of the first one-way valve both extend in the first direction; the water inlet of the second one-way valve extends in the first direction; in the assembled state, the water outlet of the first one-way valve and the water inlet of the second one-way valve are coaxially connected.

3. The one-way valve installation structure of the plunger pump according to claim 2, characterized in that: The one-way valves each include a valve seat, a valve cover and a valve core assembly, the valve seat and the valve cover are butted against each other along a first direction, and the valve core is arranged between the valve seat and the valve cover; the valve core assembly includes a ball, a pressure cap and a spring; an installation cavity for installing the valve core assembly is provided between the valve seat and the valve body; the ball and the pressure cap are both movable in the installation cavity along the first direction; the spring is arranged along the first direction, one end of which is against the end wall of the installation cavity, and the other end is against the pressure cap, and the ball is pressed against the water inlet port of the one-way valve by the pressure cap.

4. The one-way valve installation structure of the plunger pump according to claim 3, characterized in that: The ends of the valve seat and the valve cover are detachably connected via a flexible copper wire; wherein, at the opposite ends of the valve seat and the valve cover, one has a circumferentially surrounding first arcuate groove on its outer circumferential wall, and the other has a circumferentially surrounding second arcuate groove on its inner circumferential wall; when the valve seat and the valve cover are connected to each other, the first arcuate groove and the second arcuate groove form a complete annular channel; the annular channel is provided with an incision for the copper wire to pass through, and in the assembled state, the copper wire passes through the incision into the annular channel to connect the valve cover and the valve seat together.

5. The one-way valve installation structure of the plunger pump according to claim 1, characterized in that: A first sealing ring is provided between the butt ends of the first one-way valve and the second one-way valve; and / or a second sealing ring is provided between the end portion of the first one-way valve away from the second one-way valve and the abutment surface; and / or a third sealing ring is provided between the outer peripheral wall of the second one-way valve and the peripheral wall of the installation channel.

6. The one-way valve installation structure of a plunger pump according to claim 1, characterized in that: The gland is detachably mounted on the cylinder head.

7. The one-way valve installation structure of a plunger pump according to claim 6, characterized in that: A convex portion is provided at one end of the second one-way valve away from the first one-way valve; and a relief hole capable of accommodating the convex portion is provided at a side surface of the gland facing the cylinder head corresponding to the position of the convex portion.

8. The one-way valve installation structure of a plunger pump according to claim 7, characterized in that: The convex portion is provided with a threaded hole extending along the first direction.

9. The one-way valve installation structure of a plunger pump according to claim 1, characterized in that: The water inlet channel and the water outlet channel both extend along a second direction, wherein the first direction is perpendicular to the second direction.

10. A plunger pump comprising a pump body and a cylinder head, wherein the cylinder head is provided with a one-way valve, characterized in that: The one-way valve is installed in the cylinder head using the plunger pump one-way valve installation structure as described in any one of claims 1 to 9.

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