CN217898918U

CN217898918U - Vibration reduction one-way valve structure for reciprocating pump

Info

Publication number: CN217898918U
Application number: CN202222399876.0U
Authority: CN
Inventors: 沈飞铭; 史炜斌
Original assignee: Zhejiang Huisheng Fluid Equipment Co ltd
Current assignee: Zhejiang Huisheng Fluid Equipment Co ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2022-11-25
Anticipated expiration: 2032-09-09

Abstract

The utility model provides a damping check valve structure for reciprocating pump, relates to check valve technical field, including: the lower end of the valve body is in threaded fit with the pump head, and a cavity is formed inside the valve body; the lower valve cover is arranged in the cavity and abutted against the lower end face of the cavity, a first vibration reduction groove is formed in the lower end of the lower valve cover, a first vibration reduction sealing gasket is embedded in the first vibration reduction groove, the lower end of the first vibration reduction sealing gasket is abutted against the valve body, a first valve ball is arranged in the lower valve cover and positioned above the first vibration reduction sealing gasket; the upper valve cover is arranged inside the valve body and abutted to the upper side of the lower valve cover, a second vibration reduction groove is formed in the lower end of the upper valve cover, a second vibration reduction sealing gasket is embedded in the second vibration reduction groove, the lower end of the second vibration reduction sealing gasket is abutted to the upper end face of the lower valve cover, a second valve ball is arranged in the upper valve cover, and the second valve ball is located above the second vibration reduction sealing gasket. This application has set up the damping sealed pad in valve ball below and has absorbed the valve ball and has returned the kinetic energy when the seat and strike, has increased sealing reliability simultaneously.

Description

Damping check valve structure for reciprocating pump

Technical Field

The utility model belongs to the technical field of the check valve technique and specifically relates to a damping check valve structure for reciprocating pump.

Background

A one-way valve is a valve in which fluid can only flow in one direction, but not in the opposite direction. The check valve is also called as check valve or check valve, and is composed of valve body, spring and valve core, etc., the check valve is one of the important components of liquid medium pump, most of the used check valves are single ball structure, most of the single ball structure designs in the prior art have poor sealing effect, the condition that a small part of fluid flows back to the pump body often occurs, and the backflow needs to be avoided for some pump bodies.

Therefore, a double ball check valve is designed in the prior art to solve the above problems, for example, chinese utility model patent with application number CN202021024637.1 discloses a double ball check valve, which comprises a cylindrical valve body, the cylindrical valve body has a fluid inlet end and a fluid outlet end, a first valve ball and a second valve ball are sequentially arranged in an inner cavity of the cylindrical valve body from the fluid inlet end to the fluid outlet end, and a first valve seat module for mounting the first valve ball and a second valve seat module for mounting the second valve ball are arranged in the inner cavity of the cylindrical valve body; the first valve seat module comprises a first valve seat and a first valve cover, the first valve seat is provided with a first valve hole, one side, close to the first valve seat, of the first valve cover is provided with a first accommodating groove for accommodating a first valve ball, and the first valve cover is provided with an elastic pressing assembly for applying force to the first valve ball along the closing direction of the first valve ball; the second valve seat module comprises a second valve seat and a second valve cover, a second valve hole is formed in the second valve seat, and a second accommodating groove is formed in one side, close to the second valve seat, of the second valve cover.

The double-ball one-way valve is used for industry, noise and vibration influence are not needed to be concerned about, but at present, some reciprocating pumps are applied to the water treatment process of old communities, industrial equipment serves as civil facilities, the noise of the equipment also meets civil requirements, in the practical application process, the noise source of the reciprocating pumps is mainly concentrated on a valve group part, because liquid in the valve group can generate a turbulent flow phenomenon, meanwhile, the valve ball and a valve plate have a certain height when being opened, kinetic energy impacts when returning to a seat, and the turbulent flow and the kinetic energy impacts to cause sealing instability and vibration, which are noise sources.

SUMMERY OF THE UTILITY MODEL

A damping one-way valve structure for a reciprocating pump comprises: the lower end of the valve body is in threaded fit with a pump head of the reciprocating pump, a cavity is formed in the valve body, and an output hole for outputting a medium is formed in the side face of the valve body; the lower valve cover is arranged in the cavity and abutted against the lower end face of the cavity, a first vibration reduction groove is formed in the lower end of the lower valve cover, a first vibration reduction sealing gasket is embedded in the first vibration reduction groove, the lower end of the first vibration reduction sealing gasket is abutted against the valve body, a first valve ball is arranged in the lower valve cover and positioned above the first vibration reduction sealing gasket; the upper valve cover is arranged inside the valve body and abutted against the upper portion of the lower valve cover, a second vibration reduction groove is formed in the lower end of the upper valve cover, a second vibration reduction sealing gasket is embedded in the second vibration reduction groove, the lower end of the second vibration reduction sealing gasket is abutted against the upper end face of the lower valve cover, a second valve ball and a control part are arranged in the upper valve cover, the elastic resetting piece for resetting the second valve ball is arranged, and the second valve ball is located above the second vibration reduction sealing gasket.

Preferably, in the above technical scheme, a first circular truncated cone-shaped groove is formed in the inner side of the upper end of the first vibration reduction sealing gasket, and a groove surface of the first circular truncated cone-shaped groove abuts against the first valve ball; and a second circular truncated cone-shaped groove is formed in the inner side of the upper end of the second vibration reduction sealing gasket, and the groove surface of the second circular truncated cone-shaped groove is abutted against the second valve ball.

Preferably, the cavity is internally provided with a three-section stepped hole with gradually increased diameter from bottom to top, and the stepped hole is a small-diameter hole, a medium-diameter hole and a large-diameter hole from bottom to top in sequence; the valve body is also provided with an input hole for inputting a medium, the input hole penetrates through the lower end face of the valve body, and the input hole is communicated with the small-diameter hole; the lower valve cover is divided into a lower valve cover cap part and a lower valve cover body part, the upper valve cover is divided into an upper valve cover cap part and an upper valve cover body part, wherein the outer diameter of the lower valve cover body part is matched with the inner diameter of the small-diameter hole, the outer diameter of the lower valve cover cap part is matched with the middle-diameter hole, the outer diameter of the upper valve cover body part is matched with the inner diameter of the middle-diameter hole, and the outer diameter of the upper valve cover cap part is matched with the inner diameter of the large-diameter hole.

Preferably, the upper valve bonnet portion and the upper valve bonnet portion are of a split structure, the upper valve bonnet portion is a fastening threaded sleeve, external threads are formed on the outer side of the fastening threaded sleeve, internal threads matched with the external threads of the fastening threaded sleeve are formed in the large-diameter hole, and a hexagon socket is formed in the center of the fastening threaded sleeve.

Preferably, the cavity penetrates through the upper end face of the valve body, internal threads are formed in the cavity, and the valve body plugs an opening in the upper end face of the valve body through a bonnet; the valve cap with the internal thread screw-thread fit of cavity, the valve cap with be provided with first sealing washer between the valve body.

Preferably, the lower valve bonnet is provided with a flow guide channel which radially penetrates through the lower valve bonnet.

Preferably, two sections of valve body threads are formed in the outer side of the lower end of the valve body, an overtravel excircle is arranged between the two sections of valve body threads, the valve body threads located below are in threaded fit with the pump head threads, and the valve body threads located above are in threaded fit with a locking nut.

As the optimization of the technical scheme, an annular groove is formed in the lower end face of the locking nut, and a tetrafluoro check ring is arranged in the annular groove.

Preferably, in the above technical solution, before the upper valve bonnet abuts against the lower valve bonnet, the lower end surface of the second vibration reduction gasket protrudes out of the second vibration reduction groove; the lower valve cover abuts against the lower end face of the cavity in front, and the lower end face of the first vibration reduction sealing gasket protrudes out of the first vibration reduction groove.

Preferably, the second sealing ring with a circular section is sleeved on the overtravel excircle.

To sum up, the utility model has the advantages of it is following:

1. the damping sealing gasket is arranged below the valve ball to absorb kinetic energy impact when the valve ball returns to the seat, meanwhile, the sealing reliability is improved, and the valve ball is usually made of hard metal, so that the matching precision between the valve ball and the valve seat can be enhanced by the arrangement of the damping sealing gasket, and leakage caused by poor sealing is prevented;

2. furthermore, the contact end of the vibration reduction sealing gasket and the valve ball is a circular truncated cone-shaped groove, so that the embedding degree of the valve ball and the vibration reduction sealing gasket can be improved when the valve seat returns, and the reverse sealing performance of the one-way valve is better;

3, the corresponding structure is designed to facilitate the installation of the internal components of the valve body, so that the position of the vibration reduction sealing gasket is fixed relative to the valve body, and the effective fixed vibration reduction effect is achieved;

4. furthermore, this application has set up corresponding seal structure in the junction of the pump body and valve body, further promotes the sealed effect of the pump body and valve body junction.

The benefits of further or additional details will be discussed in the examples.

Drawings

FIG. 1 is a schematic view of the check valve and pump head of the present application;

FIG. 2 is a schematic view of a check valve of the present application;

FIG. 3 is a schematic view of a valve body of the present application;

FIG. 4 is a full cross-sectional view of the upper bonnet construction of the present application;

FIG. 5 is a full sectional view of the lower valve bonnet structure of the present application

The valve comprises a valve body 1, a small-diameter hole 11, a middle-diameter hole 12, a large-diameter hole 13, an input hole 14, an output hole 15, a valve body thread 16, an overrun excircle 17, a locknut 18, a circular groove 181, a tetrafluoro check ring 182, a second sealing ring 19, a lower valve cover 2, a lower valve cover cap 21, a lower valve cover body 22, a lower valve cover body 23, a first vibration reduction groove 24, a flow guide channel 3, an upper valve cover 31, a set screw sleeve 32, an upper valve cover body 33, a second vibration reduction groove 311, an inner hexagonal hole 4, a first vibration reduction sealing gasket 41, a first circular table groove 5, a second vibration reduction sealing gasket 51, a second circular table groove 6, a valve cap 61, a first sealing ring 7, a circular table groove 71, a first valve ball, a second valve ball b and an elastic reset piece c.

Detailed Description

The terms upper, lower, left, right, front, rear, front, back, top, bottom and the like in the description, or which may be referred to in the specification, are defined with respect to the configurations shown in the drawings, and the words "inner" and "outer" refer to the relative concepts toward and away from the geometric center of a particular component, respectively, and thus may be changed accordingly depending on the position in which it is located and the state of use. Therefore, these and other directional terms should not be construed as limiting terms.

The invention will be further explained with reference to the following examples:

the embodiment is as follows:

a vibration damping one-way valve structure for a reciprocating pump, please refer to fig. 1 to 5, comprises a valve body 1, a lower valve cover 2 and an upper valve cover 3, wherein the lower end of the valve body 1 is in threaded fit with a reciprocating pump head 7, a chamber is arranged inside the valve body 1, and an output hole 15 for medium output is arranged on the side surface of the valve body 1; the lower valve cover 2 is arranged in the cavity and abutted against the lower end face of the cavity, a first vibration reduction groove 23 is formed in the lower end of the lower valve cover 2, a first vibration reduction sealing gasket 4 is arranged in the first vibration reduction groove 23, the lower end of the first vibration reduction sealing gasket 4 is abutted against the valve body 1, a first valve ball a is arranged in the lower valve cover 2 and is positioned above the first vibration reduction sealing gasket 4; the upper valve cover 3 is arranged inside the valve body 1 and is abutted to the upper side of the lower valve cover 2, the lower end of the upper valve cover 3 is provided with a second vibration reduction groove 33, a second vibration reduction sealing gasket 5 is arranged in the second vibration reduction groove 33, the lower end of the second vibration reduction sealing gasket 5 is abutted to the upper end face of the lower valve cover 2, a second valve ball b and an elastic resetting piece c for controlling the resetting of the second valve ball b are arranged in the upper valve cover 3, and the second valve ball b is located above the second vibration reduction sealing gasket 5. The outlet hole 15 is located above the upper bonnet 3 and is a threaded hole for connection with an outlet pipe.

The check valve adopts a double-valve ball structure, compared with most check valves with single valve balls in the prior art, the double-valve ball has better sealing effect than the single valve ball, in addition, a second valve ball b in the upper valve cover 3 is abutted by an elastic reset piece c, and the elastic reset piece c is a spring; the liquid flows in the one-way valve from the lower end of the valve body 1 into the chamber, sequentially passes through the lower valve cover 2 and the upper valve cover 3, and finally outputs the liquid medium from the output hole 15. It should be noted that in the present application, the elastic restoring member c is not connected to the first valve ball a inside the lower housing 2, but the diversion channel 24 is designed on the lower housing 2, because the function of the check valve is mainly realized by the structural configuration inside the upper housing 3, namely, the flow channel inside the upper housing 3 and the cooperation of the first valve ball a and the passage port realize the one-way flow of the liquid medium, the design of the lower housing 2 mainly functions as the sealing assistance, because the damping low-leakage check valve structure for the reciprocating pump of the present application is vertically arranged on the pump head 7, under the action of gravity, as long as there is no strong water flow impact force below, the first valve ball a will abut against the first damping gasket 4, so as to prevent the fluid overflowing from the upper housing 3 from flowing back into the pump head 7, the fluid normally flowing into the check valve structure from the pump head 7 will preferentially lift the first valve ball a inside the lower housing 2, and the fluid will flow through the diversion channel 24 and then flow through the second valve ball b inside the upper housing 3 and flow out of the output chamber from the upper housing 3 b.

A first circular truncated cone-shaped groove 41 is formed in the inner side of the upper end of the first vibration reduction sealing gasket 4, and the groove surface of the first circular truncated cone-shaped groove 41 abuts against the first valve ball a; a second circular truncated cone-shaped groove 51 is formed in the inner side of the upper end of the second vibration reduction sealing gasket 5, and the groove surface of the second circular truncated cone-shaped groove 51 abuts against a second valve ball b; the truncated cone-shaped structure is more suitable for supporting the spherical parts (namely the first valve ball a and the second valve ball b), and the sealing performance is better.

After the whole lower valve bonnet 2 and the whole upper valve bonnet 3 are installed in the valve body 1, the lower end of the first vibration reduction sealing gasket 4 is abutted against the lower end surface of the inner cavity of the valve body 1, the upper end of the first vibration reduction sealing gasket 4 is abutted against the bottom of the first vibration reduction groove 23, and the outer diameter of the first vibration reduction sealing gasket 4 is the same as the inner diameter of the first vibration reduction groove 23; the lower end of the second vibration reduction sealing gasket 5 is abutted against the upper side of the lower valve housing 2, the upper end of the second vibration reduction sealing gasket 5 is greatly abutted in the second vibration reduction groove 33, and the outer diameter of the second vibration reduction sealing gasket 5 is the same as the inner diameter of the second vibration reduction groove 33. In fact, the thickness of the first damping gasket 4 is greater than the depth of the first damping groove 23, and the thickness of the second damping gasket 5 is greater than the depth of the second damping groove 33, that is, before the installation is completed, the first damping gasket 4 placed in the first damping groove 23 protrudes from the first damping groove 23, and the second damping gasket 5 placed in the second damping groove 33 protrudes from the second damping groove 33, so that the first damping gasket 4 needs to be completely pressed into the first damping groove 23, and the second damping gasket 5 needs to be completely pressed into the second damping groove 33 to realize perfect matching of the damping gasket and the damping groove to improve the damping effect.

Based on the above requirements, the present application designs the following structure to achieve the above effects:

the cavity is internally provided with a three-section stepped hole with gradually increased diameter from bottom to top, and the stepped hole is sequentially provided with a small-diameter hole 11, a middle-diameter hole 12 and a large-diameter hole 13 from bottom to top; the valve body 1 is also provided with an input hole 14 for inputting a medium, the input hole 14 penetrates through the lower end face of the valve body 1, and the input hole 14 is communicated with the small-diameter hole 11; the lower bonnet 2 is divided into a lower bonnet cap portion 21 and a lower bonnet body portion 22, and the upper bonnet 3 is divided into an upper bonnet cap portion and an upper bonnet body portion 32, wherein the outer diameter of the lower bonnet body portion 22 is adapted to the inner diameter of the small diameter hole 11, the outer diameter of the lower bonnet cap portion 21 is adapted to the middle diameter hole 12, the outer diameter of the upper bonnet body portion 32 is adapted to the inner diameter of the middle diameter hole 12, and the outer diameter of the upper bonnet cap portion is adapted to the inner diameter of the large diameter hole 13. Specifically, the lower valve bonnet portion 21 and the lower valve bonnet portion 22 of the lower valve bonnet 2 are integrally formed, the upper valve bonnet portion and the upper valve bonnet portion 32 of the upper valve bonnet 3 are split structures, the upper valve bonnet portion is a fastening screw sleeve 31, an external thread is arranged on the outer side of the fastening screw sleeve 31, an internal thread matched with the external thread of the fastening screw sleeve 31 is arranged in the large-diameter hole 13, and an inner hexagonal hole 311 is arranged in the center of the fastening screw sleeve 31; the hexagon socket 311 is not only a passage through which a fluid flows but also a tool hole through which the hexagon socket wrench rotates the tightening nut 31.

Based on above-mentioned structural setting, valve bonnet 2 and last valve bonnet 3 are installed in the cavity of valve body 1 through following mode under this application:

s1: the first vibration reduction sealing gasket 4 is placed into the first vibration reduction groove 23, the whole lower valve housing body part 22 is placed into the small-diameter hole 11 in the valve body 1 (the lower valve housing cap part 21 of the lower valve housing 2 is positioned in the middle-diameter hole 12), at this time, the lower end surface of the first vibration reduction sealing gasket 4 abuts against the bottom of the cavity, but the lower end of the lower valve housing 2 does not abut against the bottom of the cavity, and the first vibration reduction sealing gasket 4 protrudes out of the first vibration reduction groove 23;

s2: placing the second vibration reduction sealing gasket 5 into the second vibration reduction groove 33, placing the whole upper valve bonnet body 32 into the middle diameter hole 12 in the valve body 1, wherein the lower end face of the second vibration reduction sealing gasket 5 abuts against the upper part of the lower valve bonnet 2, the lower end of the upper valve bonnet 3 does not abut against the lower valve bonnet 2, and the second vibration reduction sealing gasket 5 protrudes out of the second vibration reduction groove 33;

s3: through the drive with the hexagon socket wrench who decides hexagonal hole 311 looks adaptation in the screw sleeve 31 center tightly, it decides screw sleeve 31 in 13 internal rotations in big footpath hole and go deep into big footpath hole 13 tightly, it leans on behind the valve bonnet somatic part 32 tightly to decide screw sleeve 31, hexagon socket wrench continues to rotate tightly decides screw sleeve 31, at the in-process of marcing, first damping gasket 4 is impressed in first damping groove 23, second damping gasket 5 is impressed in second damping groove 33, finally, it leans on the bottom of big footpath hole 13 tightly to decide screw sleeve 31, it leans on valve bonnet 2 under to go up valve bonnet part 32, lower valve bonnet 2 supports and leans on in 1 cavity bottom of valve body, accomplish closely fitting.

The two compressed vibration reduction sealing gaskets are closely matched with the respective vibration reduction grooves, the loosening condition cannot occur, the vibration of the valve ball impacting the vibration reduction sealing gaskets is reduced, and the noise caused by the vibration is also solved.

In addition, because the lower bonnet 2 and the upper bonnet 3 of the check valve of this application need be installed, therefore, the upper end of valve body 1 can not set up closed structure, in this application, big footpath hole 13 runs through valve body 1 up end, big footpath hole 13 is whole all to be the screw hole of in-band screw thread, the opening of valve body 1 up end is passed through bonnet 6 shutoff valve body 1 in the upper end of valve body 1, of course, still offer the storage tank that is used for holding the sealing washer on the valve body 1, the cover is equipped with first sealing washer 61 on the bonnet 6, after bonnet 6 has turned over into big footpath hole 13 completely, first sealing washer 61 also holds and forms sealedly in the storage tank.

Two sections of valve body threads 16 are formed in the outer side of the lower end of the valve body 1, an overrun outer circle 17 is arranged between the two sections of valve body threads 16, the valve body threads 16 located below are in threaded fit with the pump head 7, a locking nut 18 is in threaded fit with the valve body threads 16 located above, an annular groove 181 is formed in the lower end face of the locking nut 18, a polytetrafluoroethylene check ring 182 is arranged in the annular groove 181, and a second sealing ring 19 with a circular cross section is sleeved on the overrun outer circle 17.

The opening of the internal thread of the pump head 7, which is matched with the one-way valve structure of the present application, is provided with a third circular truncated cone-shaped groove 71 with an inverted circular truncated cone shape, when the valve body 1 is screwed into the pump head 7, the second sealing ring 19 is clamped into the third circular truncated cone-shaped groove 71 of the pump head 7, and at the moment, the locking nut 18 is screwed, and the second sealing ring 19 is gradually pressed into the third circular truncated cone-shaped groove 71 to form a seal between the pump head 7 and the valve body 1.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a damping check valve structure for reciprocating pump which characterized in that, including:

the lower end of the valve body is in threaded fit with a pump head of the reciprocating pump, a cavity is formed in the valve body, and an output hole for outputting a medium is formed in the side face of the valve body;

the lower valve cover is arranged in the cavity and abutted against the lower end face of the cavity, a first vibration reduction groove is formed in the lower end of the lower valve cover, a first vibration reduction sealing gasket is embedded in the first vibration reduction groove, the lower end of the first vibration reduction sealing gasket is abutted against the valve body, a first valve ball is arranged in the lower valve cover and positioned above the first vibration reduction sealing gasket;

the upper valve cover is arranged inside the valve body and abutted against the upper portion of the lower valve cover, a second vibration reduction groove is formed in the lower end of the upper valve cover, a second vibration reduction sealing gasket is embedded in the second vibration reduction groove, the lower end of the second vibration reduction sealing gasket is abutted against the upper end face of the lower valve cover, a second valve ball and a control part are arranged in the upper valve cover, the elastic resetting piece for resetting the second valve ball is arranged, and the second valve ball is located above the second vibration reduction sealing gasket.

2. The vibration damping one-way valve structure for the reciprocating pump according to claim 1, wherein a first circular truncated cone-shaped groove is formed in the inner side of the upper end of the first vibration damping sealing gasket, and a groove surface of the first circular truncated cone-shaped groove abuts against the first valve ball; and a second circular truncated cone-shaped groove is formed in the inner side of the upper end of the second vibration reduction sealing gasket, and the groove surface of the second circular truncated cone-shaped groove is abutted against the second valve ball.

3. The vibration damping one-way valve structure for the reciprocating pump according to claim 1, wherein the chamber is internally provided with a three-section stepped hole with gradually increased diameter from bottom to top, and the stepped hole is a small-diameter hole, a medium-diameter hole and a large-diameter hole from bottom to top; the valve body is also provided with an input hole for inputting a medium, the input hole penetrates through the lower end face of the valve body, and the input hole is communicated with the small-diameter hole; the lower valve cover is divided into a lower valve cover cap part and a lower valve cover body part, the upper valve cover is divided into an upper valve cover cap part and an upper valve cover body part, wherein the outer diameter of the lower valve cover body part is matched with the inner diameter of the small-diameter hole, the outer diameter of the lower valve cover cap part is matched with the middle-diameter hole, the outer diameter of the upper valve cover body part is matched with the inner diameter of the middle-diameter hole, and the outer diameter of the upper valve cover cap part is matched with the inner diameter of the large-diameter hole.

4. The vibration damping one-way valve structure for the reciprocating pump according to claim 3, wherein the upper valve cap portion and the upper valve cap body portion are of a split structure, the upper valve cap portion is a fastening screw sleeve, an external thread is formed on the outer side of the fastening screw sleeve, an internal thread matched with the external thread of the fastening screw sleeve is formed inside the large-diameter hole, and a hexagon socket hole is formed in the center of the fastening screw sleeve.

5. The structure of the damping one-way valve for the reciprocating pump according to claim 1, wherein the cavity penetrates through the upper end face of the valve body, internal threads are formed in the cavity, and the valve body blocks the opening of the upper end face of the valve body through a valve cap; the valve cap with the internal thread screw-thread fit of cavity, the valve cap with be provided with first sealing washer between the valve body.

6. The vibration damping one-way valve structure for the reciprocating pump according to claim 1, wherein the lower valve housing is provided with a flow guide channel radially penetrating through the lower valve housing.

7. The vibration damping one-way valve structure for the reciprocating pump according to claim 1, wherein two sections of valve body threads are formed on the outer side of the lower end of the valve body, an overtravel outer circle is arranged between the two sections of valve body threads, the valve body threads on the lower portion are in threaded fit with the pump head threads, and a locking nut is in threaded fit with the valve body threads on the upper portion.

8. The vibration damping one-way valve structure for the reciprocating pump according to claim 7, wherein a ring groove is formed in the lower end face of the lock nut, and a tetrafluoro check ring is arranged in the ring groove.

9. The vibration damping one-way valve structure for the reciprocating pump according to claim 1, wherein a lower end surface of the second vibration damping packing is disposed to protrude out of the second vibration damping groove before the upper valve housing abuts against the lower valve housing; the lower valve cover abuts against the lower end face of the cavity in front, and the lower end face of the first vibration reduction sealing gasket protrudes out of the first vibration reduction groove.

10. The vibration damping one-way valve structure for the reciprocating pump according to claim 7, wherein the over-travel outer circle is sleeved with a second sealing ring with a circular section.