CN113775516A

CN113775516A - Valve body, valve component and plunger pump

Info

Publication number: CN113775516A
Application number: CN202111192918.7A
Authority: CN
Inventors: 李晓斌; 姜琛; 王继鑫; 王宝杰; 张树林; 李朋
Original assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Current assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2021-12-10
Anticipated expiration: 2041-10-13
Also published as: CN113775516B; WO2023061097A1

Abstract

A valve body, a valve component and a plunger pump. The valve body comprises a valve body part, a first elastic part and a second elastic part; the valve body part is provided with a central shaft; the valve body part comprises an upper body part and a lower body part which are sequentially arranged in the extending direction of the central shaft, the first elastic part is positioned on one side of the upper body part, which is far away from the central shaft, and the second elastic part is positioned on one side of the lower body part, which is far away from the central shaft. The upper body part and the lower body part are symmetrically arranged, and the first elastic part and the second elastic part are symmetrically arranged. The valve body can be turned over and can be continuously used when the first elastic part or the second elastic part is worn to be incapable of being used. Therefore, the valve body can greatly prolong the service life and reduce the maintenance cost.

Description

Valve body, valve component and plunger pump

Technical Field

Embodiments of the present disclosure relate to a valve body, a valve assembly, and a plunger pump.

Background

In the field of oil and gas exploitation, fracturing operation refers to a technology of forming cracks in oil and gas layers by using high-pressure fracturing fluid in the process of oil or gas exploitation. The fracturing operation can lead the oil-gas layer to form cracks, thereby improving the flowing environment of oil or natural gas in the underground and increasing the yield of the oil well. Thus, fracturing operations are the primary means of stimulation in oil and gas field production. On the other hand, the shale gas resources in the world are rich, but the shale formation permeability is low, so that the shale gas resources are not widely developed at present. The fracturing technology is one of core technologies for shale gas development, and can be widely applied to shale reservoir transformation and shale gas exploitation.

Equipment used to perform fracturing operations typically includes sand mulling equipment, compounding equipment, and fracturing equipment. The sand mixing equipment and the mixing equipment can be used for preparing fracturing fluid carrying fracturing sand; the fracturing equipment may pressurize the fracturing fluid. Fracturing equipment typically includes a plunger pump and a prime mover to power the plunger pump, which may use mechanical power provided by the prime mover to pressurize fluid.

Disclosure of Invention

The disclosed embodiments provide a valve body, a valve component and a plunger pump. The valve body comprises a valve body part, a first elastic part and a second elastic part; the valve body part is provided with a central shaft; the valve body part comprises an upper body part and a lower body part which are sequentially arranged in the extending direction of the central shaft, the first elastic part is positioned on one side of the upper body part, which is far away from the central shaft, and the second elastic part is positioned on one side of the lower body part, which is far away from the central shaft. The upper body part and the lower body part are symmetrically arranged, and the first elastic part and the second elastic part are symmetrically arranged. The valve body can be turned over and can be continuously used when the first elastic part or the second elastic part is worn to be incapable of being used. Therefore, the valve body can greatly prolong the service life and reduce the maintenance cost.

At least one embodiment of the present disclosure provides a valve body, including: a valve body portion having a central axis; a first elastic part; the valve body part comprises an upper body part and a lower body part which are sequentially arranged in the extending direction of the central shaft, the first elastic part is positioned on one side of the upper body part, which is far away from the central shaft, the second elastic part is positioned on one side of the lower body part, which is far away from the central shaft, the upper body part and the lower body part are symmetrically arranged, and the first elastic part and the second elastic part are symmetrically arranged.

For example, in the valve body provided in an embodiment of the present disclosure, the first elastic portion is an annular structure and is disposed on the upper body portion, and the second elastic portion is an annular structure and is disposed on the lower body portion.

For example, in the valve body provided in an embodiment of the present disclosure, a distance between a surface of the first elastic portion away from the central axis and the central axis is greater than a distance between a surface of the upper body portion away from the central axis and the central axis; the distance between the surface of the second elastic part far away from the central shaft and the central shaft is larger than the distance between the surface of the lower body part far away from the central shaft and the central shaft.

For example, in a valve body provided in an embodiment of the present disclosure, the valve body further includes an intermediate portion between the upper body portion and the lower body portion, the intermediate portion having a radial dimension greater than a radial dimension of the upper body portion and a radial dimension of the lower body portion.

For example, in a valve body provided in an embodiment of the present disclosure, the upper body includes a first groove located on a side of the upper body away from the central axis, and the first elastic portion is at least partially located in the first groove; the lower body part comprises a second groove which is positioned on one side of the lower body part far away from the central shaft, and the second elastic part is at least partially positioned in the second groove.

For example, in a valve body provided in an embodiment of the present disclosure, the first groove is contiguous with the intermediate portion, and the second groove is contiguous with the intermediate portion.

For example, in a valve body provided in an embodiment of the present disclosure, the middle portion includes a protruding portion protruding from the upper body portion and the lower body portion, the protruding portion includes a first surface away from the central axis, a second surface intersecting the first surface and being away from the upper body portion, and a third surface intersecting the first surface and being away from the lower body portion, the second surface includes a first recessed structure from which the protruding portion is recessed, and the third surface includes a second recessed structure from which the protruding portion is recessed.

For example, in the valve body provided in an embodiment of the present disclosure, the first elastic portion includes a first protruding structure disposed corresponding to the first recessed structure and located in the first recessed structure; the second elastic part comprises a second protruding structure, is arranged corresponding to the second concave structure and is positioned in the second concave structure.

For example, in the valve body provided in an embodiment of the present disclosure, a first distance between a surface of the first elastic portion away from the central axis and the central axis is smaller than or equal to a distance between the first surface and the central axis, and a second distance between a surface of the second elastic portion away from the central axis and the central axis is smaller than or equal to a distance between the first surface and the central axis.

For example, in a valve body provided in an embodiment of the present disclosure, the first elastic portion and the second elastic portion are integrated into a single body.

For example, in the valve body provided in an embodiment of the present disclosure, the valve body includes a third groove located on a side of the valve body away from the central axis, and the first elastic portion and the second elastic portion are both located at least partially in the third groove.

For example, the valve body that this disclosure embodiment provided still includes: and the guide structure is connected with the valve body part.

For example, in the valve body provided in an embodiment of the present disclosure, the guide structure includes a guide rod including a first sub-guide rod and a second sub-guide rod, the first sub-guide rod is connected to the upper body portion and extends along an extending direction of the central shaft, and the second sub-guide rod is connected to the lower body portion and extends along the extending direction of the central shaft.

For example, in a valve body provided in an embodiment of the present disclosure, the first sub guide rod, the second sub guide rod, and the valve body portion are integrally formed.

For example, in the valve body provided in an embodiment of the present disclosure, the first sub-guide rod and the second sub-guide rod are coaxially disposed and have the same length.

For example, in a valve body provided in an embodiment of the present disclosure, the upper body portion includes a first insertion groove, the lower body portion includes a second insertion groove, the central shaft passes through the first insertion groove and the second insertion groove, and the guiding structure includes a tongue configured to be inserted into the first insertion groove or the second insertion groove.

For example, in a valve body provided in an embodiment of the present disclosure, the guide structure includes a guide frame or a guide rod.

For example, in a valve body provided in an embodiment of the present disclosure, a material of the first elastic portion and the second elastic portion includes one or more of rubber, polyurethane, and polyvinyl chloride.

At least one embodiment of the present disclosure also provides a valve assembly comprising the valve body of any one of the above.

At least one embodiment of the present disclosure also provides a plunger pump including a valve assembly as described in any one of the above.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

FIG. 1 is a schematic diagram of a fluid end of a plunger pump;

FIG. 2 is a schematic cross-sectional view of a valve body;

FIG. 3 is a schematic cross-sectional view of another valve body;

fig. 4 is a schematic structural diagram of a valve body according to an embodiment of the present disclosure;

fig. 5 is a schematic cross-sectional view of a valve body according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of another valve body according to an embodiment of the present disclosure;

FIG. 7 is a schematic cross-sectional view of another valve body according to an embodiment of the present disclosure;

FIG. 8 is a schematic view of a valve assembly provided in accordance with an embodiment of the present disclosure; and

fig. 9 is a schematic view of a plunger pump according to an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

A typical plunger pump includes a power end and a fluid end; the power end is connected to the prime mover and converts mechanical power output by the prime mover into reciprocating motion of the plunger, which in turn causes a change in volume and pressure of a chamber within the valve housing of the power end. At this time, through the cooperation of the valve assembly in the hydraulic end and the reciprocating motion of the plunger, low-pressure fluid can be sucked from the outside when the plunger performs return motion, and the low-pressure fluid is pressurized when the plunger performs stroke motion. Thus, the plunger pump may convert low pressure fluid to high pressure fluid from the mechanical power provided by the prime mover.

Fig. 1 is a schematic diagram of a hydraulic end of a plunger pump. As shown in FIG. 1, the fluid end 30 includes a valve housing 31, a plunger 32, a first seal assembly 33, a second seal assembly 34, a packing assembly 35, a first valve assembly 36, and a second valve assembly 37. The valve housing 31 includes a first cavity 41 and a second cavity 42, and the first cavity 41 and the second cavity 42 are arranged to intersect with each other, and an intersection area 43 is formed at the intersection position. The first sealing assembly 33 and the packing sealing assembly 35 are respectively positioned at two ends of the first cavity 41, and the plunger 32 is partially arranged in the packing sealing assembly 35 and can reciprocate in the first cavity 41; the first valve component 36 and the second valve component 37 are respectively positioned at two ends of the second cavity 42, and the second sealing component 34 is arranged at one side of the second valve component 37 far away from the first valve component 36 and seals the end of the second cavity 42. The fluid end 30 further includes an inlet port 38 and an outlet port 39, the inlet port 38 being located on a side of the first valve assembly 36 remote from the second valve assembly 37, and the outlet port 39 being located between the second valve assembly 37 and the second seal assembly 34. The first valve assembly 36 is configured to allow ambient fluid to enter the second chamber 42 from the inlet 38, but to inhibit fluid from the second chamber 42 from exiting the inlet 38; the second valve assembly 37 is configured to allow fluid in the second cavity 42 to flow out of the outlet port 39, but no ambient fluid can flow into the second cavity 42 from the outlet port 39.

As shown in fig. 1, when the plunger 32 performs a return movement, the total volume of the first chamber 41 and the second chamber 42 becomes large, and thus a negative pressure is generated; external low-pressure fluid (such as fracturing fluid) can enter the second cavity 42 and the first cavity 41 from the first valve assembly 36, so that the suction process of the fluid is realized; when the plunger 32 is returned to the limit, the total volume of the first chamber 41 and the second chamber 42 is maximized; when the plunger 32 performs a process movement, the volumes of the first chamber 41 and the second chamber 42 become smaller, and the low-pressure fluid in the first chamber 41 and the second chamber 42 is pressurized and converted into a high-pressure fluid, at this time, because the first valve assembly 36 is closed and the second valve assembly 37 is opened, the high-pressure fluid can pass through the second valve assembly 37 and flow out from the liquid outlet 39, so as to realize the pressurizing and discharging processes of the fluid; when the plunger 32 is advanced to the limit, the total volume of the first and second chambers 41 and 42 is minimized, and the discharge process of the high pressure fluid is completed. Thus, the suction, pressurization and discharge processes of the fluid can be continuously performed by the reciprocating motion of the plunger.

It can be seen that in a plunger pump, the valve assembly is one of the important components; as shown in fig. 1, first valve component 36 may generally include a valve spring seat 36A, a spring 36B, a valve body 36C, and a valve seat 36D; the valve spring seat 36A is disposed in the alternating region 43, the spring 36B is disposed on the valve spring seat 36A, one end of the valve body 36C is disposed in contact with the spring 36B, and the other end of the valve body 36C is disposed in contact with the valve seat 36D. Under the elastic force of the spring 36B, the valve body 36C can seal the middle hole of the valve seat 36D, thereby closing the first valve component 36; when the force applied to the valve body 36C by the fluid in the direction from the valve seat 36D to the valve spring seat 36A is greater than the elastic force of the spring 36B, the valve body 36C is separated from or partially separated from the valve seat 36D, so that the middle hole of the valve seat 36D cannot be sealed, and the valve is opened. On the other hand, when fluid forces the valve body 36C in a direction from the valve spring seat 36A to the valve seat 36D, the valve body 36C still seals the central bore of the valve seat 36D. First valve component 36 thus performs the function of a check valve.

Similarly, the second valve assembly 37 may generally include a valve spring seat 37A, a spring 37B, a valve body 37C, and a valve seat 37D; a part of the second seal assembly 34 may be a valve spring seat 37A, a spring 37B is disposed on the valve spring seat 37A, one end of a valve body 37C is disposed in contact with the spring 37B, and the other end of the valve body 37C is disposed in contact with a valve seat 37D. Under the action of the elastic force of the spring 37B, the valve body 37C can seal the middle hole of the valve seat 37D, so that the second valve component 37 is closed; when the fluid applies a force to the valve body 37C in a direction from the valve seat 37D to the valve spring seat 37A, which is greater than the elastic force of the spring 37B, the valve body 37C is separated or partially separated from the valve seat 37D, so that the middle hole of the valve seat 37D cannot be sealed, and the valve is opened. On the other hand, when fluid forces the valve body 37C in a direction from the valve spring seat 37A to the valve seat 37D, the valve body 37C still seals the middle hole of the valve seat 37D. Thus, the first valve component 37 can perform the function of a one-way valve.

FIG. 2 is a schematic cross-sectional view of a valve body; fig. 3 is a schematic cross-sectional view of another valve body. As shown in fig. 2 and 3, the valve body 10 includes a valve body 11 and a rubber 12, and the rubber 12 is sleeved on the valve body 11; the valve body 11 can be divided into an upper body 11A and a lower body 11B, and the rubber 12 is disposed on the lower body 11B.

In the working process of the plunger pump, the valve body collides with the valve seat and is often washed by a high-pressure medium, so that the valve body is extremely easy to corrode and the rubber is broken, the service life of the valve body is short, the valve body needs to be frequently disassembled and assembled, and more time and labor are consumed. On the other hand, with the continuous development of the fracturing technology, the requirements of fracturing operation on the discharge capacity and pressure of the fracturing fluid are higher and higher; the fracturing fluid contains a large amount of quartz sand, ceramsite and various impurities, and the high-pressure fracturing fluid is particularly severe in erosion of the valve body, so that the valve body is easy to wear.

In view of this, the disclosed embodiments provide a valve body and a valve assembly. The valve body comprises a valve body part, a first elastic part and a second elastic part; the valve body part is provided with a central shaft; the valve body part comprises an upper body part and a lower body part which are sequentially arranged in the extending direction of the central shaft, the first elastic part is positioned on one side of the upper body part, which is far away from the central shaft, and the second elastic part is positioned on one side of the lower body part, which is far away from the central shaft. The upper body part and the lower body part are symmetrically arranged, and the first elastic part and the second elastic part are symmetrically arranged. The valve body can be turned over and can be continuously used when the first elastic part or the second elastic part is worn to be incapable of being used. Therefore, the valve body can greatly prolong the service life and reduce the maintenance cost.

The valve body and the valve assembly provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

One embodiment of the present disclosure provides a valve body. Fig. 4 is a schematic structural diagram of a valve body according to an embodiment of the present disclosure; fig. 5 is a schematic cross-sectional view of a valve body according to an embodiment of the disclosure. As shown in fig. 4 and 5, the valve body 100 includes a valve body portion 110, a first elastic portion 121, and a second elastic portion 122. The valve body 110 has a central axis 111, for example, the valve body 110 may be a rotator, and the central axis 111 may be a rotationally symmetric axis of the valve body 110.

As shown in fig. 4 and 5, the valve body 110 includes an upper body 112 and a lower body 114 sequentially arranged in the extending direction of the central shaft 111, and the first elastic part 121 is located on a side of the upper body 112 away from the central shaft 111, that is, the first elastic part 121 is located outside the upper body 112; the second elastic portion 122 is located on a side of the lower body portion 114 away from the central axis 111, that is, the second elastic portion 122 is located outside the lower body portion 114.

As shown in fig. 4 and 5, the upper body part 112 and the lower body part 114 are symmetrically disposed, and the first elastic part 121 and the second elastic part 122 are symmetrically disposed. For example, the upper body part 112 and the lower body part 114 may be symmetrically disposed with respect to a plane perpendicular to the central axis 111; the first and second

elastic parts

121 and 122 may be symmetrically disposed with respect to a plane perpendicular to the central axis 111. Note that, here, the upper body portion 112 and the lower body portion 114 are symmetrically disposed and the first elastic portion 121 and the second elastic portion 122 are symmetrically disposed, and also include being substantially symmetrically disposed with respect to each other. It can be understood that the valve body can be turned over and then used when the first elastic part or the second elastic part is worn to be unusable, which shows that the first elastic part and the second elastic part and at least the outer contour of the upper body part and the lower body part are symmetrically arranged, and the difference of the inner structure is allowed on the basis of ensuring that the elastic parts at the two sides can realize the function of the valve body.

In the valve body provided by the embodiment of the disclosure, since the valve body includes the first elastic part and the second elastic part which are respectively arranged outside the upper body part and the lower body part, and the upper body part and the lower body part are symmetrically arranged, the first elastic part and the second elastic part are symmetrically arranged; the valve body can be turned over and can be continuously used when the first elastic part or the second elastic part is worn to be incapable of being used. Therefore, the valve body can greatly prolong the service life and reduce the maintenance cost.

In some examples, as shown in fig. 4 and 5, the first elastic portion 121 is a ring-shaped structure and is sleeved on the upper body portion 122, and the second elastic portion 122 is a ring-shaped structure and is sleeved on the lower body portion 124.

In some examples, as shown in fig. 4 and 5, the material of the first elastic part 121 includes one or more of rubber, polyurethane, and polyvinyl chloride. Of course, the disclosed embodiments include but are not limited to this, and other materials with elasticity and wear resistance can be used for the material of the first elastic part.

In some examples, as shown in fig. 4 and 5, the material of the second elastic portion 122 includes one or more of rubber, polyurethane, and polyvinyl chloride. Of course, the disclosed embodiments include but are not limited to this, and other materials with elasticity and wear resistance can be used for the material of the second elastic part.

In some examples, as shown in fig. 4 and 5, a surface of the first elastic part 121 away from the central axis 111 is farther from the central axis 111 than a surface of the upper body part 112 away from the central axis 111 is from the central axis 111; the distance between the surface of the second elastic part 122 far from the central axis 111 and the central axis 111 is greater than the distance between the surface of the lower body part 114 far from the central axis 111 and the central axis 111. Therefore, in the collision and contact process of the valve body and the valve seat, the first elastic part and the second elastic part collide and contact with the valve seat, so that the effects of abrasion resistance and erosion resistance can be achieved. On the other hand, the first elastic part and the second elastic part can also enhance the sealing performance between the valve body and the valve seat.

In some examples, as shown in fig. 4 and 5, the valve body portion 110 further includes an intermediate portion 116 positioned between the upper body portion 112 and the lower body portion 114, the intermediate portion 116 having a radial dimension that is greater than a radial dimension of the upper body portion 112 and a radial dimension of the lower body portion 114. Thus, the middle portion 116 may serve to separate the first and second

elastic portions

121 and 122 and provide support for the first and second

elastic portions

121 and 122, respectively.

In some examples, as shown in fig. 4 and 5, the upper body 112 includes a first groove 131 on a side of the upper body 112 away from the central axis 111, and the first elastic part 121 is at least partially located within the first groove 131; thus, the first groove 131 may function to fix the first elastic part 121.

In some examples, as shown in fig. 4 and 5, the lower body portion 114 includes a second groove 132 on a side of the lower body portion 114 away from the central axis 111, and the second elastic portion 122 is at least partially located within the second groove 132; thus, the second groove 132 may function to fix the second elastic part 122.

In some examples, as shown in fig. 4 and 5, the first groove 131 meets the intermediate portion 116 and the second groove 132 meets the intermediate portion 116. That is, the middle portion 116 may serve as a portion of the sidewall of the first groove 131, and the middle portion 116 may serve as a portion of the sidewall of the second groove 132.

In some examples, as shown in fig. 4 and 5, the middle portion 116 includes a protrusion 1162 protruding from the upper and

lower body portions

112, 114, the protrusion 1162 including a first surface 151 distal from the central axis 111, a second surface 152 intersecting the first surface 151 and distal from the lower body portion 114, and a third surface 153 intersecting the first surface 151 and distal from the upper body portion 112; second surface 152 includes first recessed features 161 recessed from second surface 152 into projections 1162, and third surface 153 includes second recessed features 162 recessed from third surface 153 into projections 1162. The first and second recess structures 161 and 162 may further serve to fix the first and second

elastic parts

121 and 122.

In some examples, as shown in fig. 4 and 5, the first elastic part 121 includes a first protruding structure 171 disposed corresponding to the first recess structure 161 and located in the first recess structure 161; the second elastic portion 122 includes a second protruding structure 172 disposed corresponding to the second recess structure 162 and located in the second recess structure 162. Thus, the first recess structure 161 may fix the first elastic part 121 by the first protrusion structure 171; the second recess structure 162 may fix the second elastic part 122 by the second protrusion structure 172.

In some examples, as shown in fig. 4 and 5, a distance between a surface of the first elastic part 121 away from the central axis 111 and the central axis 111 is equal to or less than a distance between the first surface 151 and the central axis 111, and a distance between a surface of the second elastic part 122 away from the central axis 111 and the central axis 111 is equal to or less than a distance between the first surface 151 and the central axis 111.

In some examples, as shown in fig. 4 and 5, the valve body 100 further includes a guide structure 180, the guide structure 180 being coupled to the valve body portion 110 to guide the valve body and limit deflection of the valve body in the valve seat.

In some examples, as shown in fig. 4 and 5, the guide structure 180 includes a guide bar 182, the guide bar 182 includes a first sub-guide bar 1821 and a second sub-guide bar 1822, the first sub-guide bar 1821 is connected to the upper body part 112 and extends along the extension direction of the central axis 111, and the second sub-guide bar 1823 is connected to the lower body part 114 and extends along the extension direction of the central axis 111. Therefore, after the valve body is turned over up and down, the guide rod can still play a guiding role.

In some examples, as shown in fig. 4 and 5, the first sub guide bar 1821, the second sub guide bar 1822, and the valve body portion 110 are integrally formed. Therefore, the valve body has higher mechanical strength and simple structure. Of course, the disclosed embodiments include, but are not limited to, the first sub-guide bar, the second sub-guide bar and the valve body portion may also be manufactured separately and then assembled together.

In some examples, as shown in fig. 4 and 5, the first and second sub guide bars 1821 and 1822 are coaxially disposed and have the same length.

Fig. 6 is a schematic structural diagram of another valve body according to an embodiment of the present disclosure; fig. 7 is a schematic cross-sectional view of another valve body according to an embodiment of the disclosure. As shown in fig. 6 and 7, the first elastic part 121 and the second elastic part 122 are integrated into one body. That is, the first elastic part 121 and the second elastic part 122 are two parts of one integrated elastic member. Therefore, the number of parts and the assembly difficulty of the valve body can be reduced.

In some examples, as shown in fig. 6 and 7, the valve body 110 includes a third groove 133 on a side of the valve body 110 away from the central axis 111, and each of the first and second

elastic portions

121 and 122 is at least partially located in the third groove 133.

For example, as shown in fig. 6 and 7, the elastic member composed of the first elastic part 121 and the second elastic part 122 is at least partially located in the third groove 133. Thus, the third groove 133 may serve to fix the first and second

elastic parts

121 and 122.

In some examples, as shown in fig. 6 and 7, the valve body 100 further includes a guide structure 180, the guide structure 180 being coupled to the valve body portion 110 to guide the valve body and limit deflection of the valve body in the valve seat.

In some examples, as shown in fig. 6 and 7, the upper body part 112 includes a first insertion groove 191, the lower body part 114 includes a second insertion groove 192, the central shaft 111 passes through the first insertion groove 191 and the second insertion groove 192, and the guiding structure 180 includes a tongue 185 configured to be inserted into the first insertion groove 191 or the second insertion groove 192, so that the guiding structure 180 may be fixed to the upper body part 112 or the lower body part 114.

In some examples, the guide structure 180 includes a guide frame 184. Of course, the disclosed embodiments include but are not limited to this, and the guiding structure may also be a guiding rod as shown in fig. 4 and 5.

In some examples, as shown in fig. 6 and 7, the material of the second elastic portion 122 includes one or more of rubber, polyurethane, and polyvinyl chloride. Of course, the disclosed embodiments include but are not limited to this, and other materials with elasticity and wear resistance can be used for the material of the second elastic part.

At least one embodiment of the present disclosure also provides a valve assembly. FIG. 8 is a schematic view of a valve assembly according to one embodiment of the present disclosure. As shown in fig. 8, the valve assembly 200 includes the valve body 100 provided in any of the above examples. The valve body comprises a first elastic part and a second elastic part which are respectively arranged at the outer sides of the upper body part and the lower body part, the upper body part and the lower body part are symmetrically arranged, and the first elastic part and the second elastic part are symmetrically arranged; the valve body can be turned over and can be continuously used when the first elastic part or the second elastic part is worn to be incapable of being used. Therefore, the valve component comprising the valve body can greatly prolong the service life and reduce the maintenance cost. It should be noted that, although the valve body 100 in fig. 8 adopts the valve body as shown in fig. 6 and 7, the embodiment of the present disclosure includes but is not limited thereto, and the valve assembly may also include the valve body provided in other examples (e.g., fig. 4 and 5).

In some examples, as shown in fig. 8, the valve assembly 200 further includes a valve spring seat 210, a spring 220, and a valve seat 240; the spring 220 is disposed on the valve spring seat 210, one end of the valve body 100 is disposed in contact with the spring 220, and the other end of the valve body 100 is disposed within the middle hole of the valve seat 240. Under the elastic force of the spring 220, the valve body 100 can seal the middle hole of the valve seat 240, thereby closing the valve assembly 200; when the fluid applies pressure to the valve body 100 in a direction from the valve seat 240 to the valve spring seat 210 and is greater than the elastic force of the spring 220, the valve body 100 is separated or partially separated from the valve seat 240, so that the middle hole of the valve seat 240 cannot be sealed, and the valve is opened. On the other hand, when fluid pressurizes the valve body 100 in the direction from the valve spring seat 210 to the valve seat 240, the valve body 100 still seals the middle hole of the valve seat 240. Thus, the valve assembly 200 may function as a one-way valve.

At least one embodiment of the present disclosure also provides a plunger pump. Fig. 9 is a schematic structural diagram of a plunger pump according to an embodiment of the present disclosure. As shown in fig. 9, the plunger pump 300 includes a valve housing 310, a plunger 320, a first seal assembly 330, a second seal assembly 340, a packing seal assembly 350, a first valve assembly 360, and a second valve assembly 370. The valve housing 310 includes a first chamber 410 and a second chamber 420, and the first chamber 410 and the second chamber 420 are disposed to intersect with each other and form an intersection region 430 at the intersection position. The first sealing assembly 330 and the packing sealing assembly 350 are respectively positioned at two ends of the first cavity 410, and the plunger 320 is partially arranged in the packing sealing assembly 350 and can reciprocate in the first cavity 410; the first valve component 360 and the second valve component 370 are respectively located at two ends of the second cavity 420, and the second sealing component 340 is disposed at a side of the second valve component 370 away from the first valve component 360 and seals an end of the second cavity 420.

As shown in fig. 9, the plunger pump 300 further includes an inlet port 380 and an outlet port 390, the inlet port 380 is located on a side of the first valve assembly 360 away from the second valve assembly 370, and the outlet port 390 is located between the second valve assembly 370 and the second seal assembly 340. The first valve assembly 360 is configured to allow ambient fluid to enter the second chamber 420 from the inlet 380, but to inhibit fluid from the second chamber 420 from exiting the inlet 380; the second valve assembly 370 is configured to allow fluid in the second chamber 420 to flow out of the outlet port 390, but no ambient fluid can flow into the second chamber 420 from the outlet port 390.

As shown in fig. 9, when the plunger 320 performs a return movement, the total volume of the first chamber 410 and the second chamber 420 becomes large, thereby generating a negative pressure; external low-pressure fluid (e.g., fracturing fluid) can enter the second cavity 420 and the first cavity 410 from the first valve component 360, so that the suction process of the fluid is realized; when plunger 320 is back-stroked to the limit, the total volume of first chamber 410 and second chamber 420 is at a maximum; when the plunger 320 performs a process movement, the volumes of the first chamber 410 and the second chamber 420 become smaller, and the low-pressure fluid in the first chamber 410 and the second chamber 420 is pressurized and converted into a high-pressure fluid, at this time, since the first valve assembly 360 is closed and the second valve assembly 370 is opened, the high-pressure fluid can pass through the second valve assembly 370 and flow out from the liquid outlet 390, so as to realize the pressurizing and discharging processes of the fluid; when the plunger 320 moves to the limit, the total volume of the first and second chambers 410 and 420 is minimized, and the discharge of the high-pressure fluid is completed. Thus, the suction, pressurization and discharge processes of the fluid can be continuously performed by the reciprocating motion of the plunger.

As shown in fig. 9, the first valve assembly 360 and the second valve assembly 370 can both employ the valve assembly 200 of any of the above examples, thereby greatly reducing the maintenance time and cost of the plunger pump.

The following points need to be explained:

(1) in the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to general designs.

(2) Features of the disclosure in the same embodiment and in different embodiments may be combined with each other without conflict.

The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and shall be covered by the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A valve body, comprising:

a valve body portion having a central axis;

a first elastic part; and

a second elastic part which is arranged at the second side of the frame,

wherein the valve body comprises an upper body and a lower body which are arranged in sequence in the extending direction of the central shaft, the first elastic part is positioned on one side of the upper body far away from the central shaft, the second elastic part is positioned on one side of the lower body far away from the central shaft,

the upper body part and the lower body part are symmetrically arranged, and the first elastic part and the second elastic part are symmetrically arranged.

2. The valve body as claimed in claim 1, wherein the first resilient portion is a ring-shaped structure and is disposed on the upper body portion, and the second resilient portion is a ring-shaped structure and is disposed on the lower body portion.

3. The valve body according to claim 1, wherein a surface of the first resilient portion distal from the central axis is spaced further from the central axis than a surface of the upper body portion distal from the central axis;

the distance between the surface of the second elastic part far away from the central shaft and the central shaft is larger than the distance between the surface of the lower body part far away from the central shaft and the central shaft.

4. The valve body according to any one of claims 1-3, wherein the valve body further comprises an intermediate portion between the upper body portion and the lower body portion, the intermediate portion having a radial dimension greater than a radial dimension of the upper body portion and a radial dimension of the lower body portion.

5. The valve body of claim 4, wherein the upper body portion includes a first recess on a side of the upper body portion away from the central axis, the first resilient portion being at least partially within the first recess;

the lower body part comprises a second groove which is positioned on one side of the lower body part far away from the central shaft, and the second elastic part is at least partially positioned in the second groove.

6. The valve body of claim 5, wherein the first groove is contiguous with the intermediate portion and the second groove is contiguous with the intermediate portion.

7. The valve body of claim 6, wherein the intermediate portion includes a protrusion protruding from the upper and lower body portions, the protrusion including a first surface distal from the central axis, a second surface intersecting the first surface and distal from the lower body portion, and a third surface intersecting the first surface and distal from the upper body portion,

the second surface includes a first recessed feature from which the protruding portion is recessed, and the third surface includes a second recessed feature from which the protruding portion is recessed.

8. The valve body according to claim 7, wherein the first elastic portion comprises a first protruding structure disposed corresponding to and within the first recessed structure;

the second elastic part comprises a second protruding structure, is arranged corresponding to the second concave structure and is positioned in the second concave structure.

9. The valve body as claimed in claim 7, wherein a first distance between a surface of the first elastic portion away from the central axis and the central axis is less than or equal to a distance between the first surface and the central axis, and a second distance between a surface of the second elastic portion away from the central axis and the central axis is less than or equal to a distance between the first surface and the central axis.

10. A valve body as claimed in any one of claims 1 to 3, wherein the first and second resilient portions are integral.

11. The valve body of claim 10, wherein the valve body portion includes a third recess on a side of the valve body portion away from the central axis,

the first and second resilient portions are each at least partially located within the third recess.

12. The valve body of any one of claims 1-3, further comprising:

and the guide structure is connected with the valve body part.

13. The valve body according to claim 12, wherein the guide structure comprises a guide rod including a first sub-guide rod connected to the upper body portion and extending in the extending direction of the central shaft, and a second sub-guide rod connected to the lower body portion and extending in the extending direction of the central shaft.

14. The valve body of claim 13, wherein the first sub-guide rod, the second sub-guide rod and the valve body portion are integrally formed.

15. The valve body as claimed in claim 13, wherein the first and second sub-guide rods are coaxially arranged and have the same length.

16. The valve body of claim 12, wherein the upper body portion includes a first slot, the lower body portion includes a second slot, the central axis passes through the first slot and the second slot, and the guide structure includes a tab configured to be inserted into the first slot or the second slot.

17. A valve body as claimed in claim 16, wherein the guide formation comprises a guide frame or a guide rod.

18. The valve body of any one of claims 1-3, wherein the material of the first and second elastomeric portions comprises one or more of rubber, polyurethane, polyvinyl chloride.

19. A valve assembly comprising a valve body according to any one of claims 1 to 18.

20. A plunger pump comprising the valve assembly of claim 19.