Multi-unit one-way valve device and graphene slurry pumping system

Abstract

The invention discloses a multi-unit one-way valve device and a graphene slurry pumping system.The multi-unit one-way valve device comprises a plunger pump, the plunger pump is internally provided with the multi-unit one-way valve device, the multi-unit one-way valve device comprises a plurality of valve units which are sequentially arranged in series in the conveying direction of fluid, and each valve unit comprises a valve body with the two ends provided with an inlet and an outlet respectively; the valve body is internally provided with a flow channel communicated with the inlet and the outlet, the flow channel is internally provided with a valve element assembly enabling fluid to only flow towards the outlet, and the inlet and the outlet of any two adjacent valve units are directly and fixedly connected in a detachable mode and are communicated with each other. The invention provides a multi-unit one-way valve device and a graphene slurry pumping system. According to the multi-unit one-way valve device and the graphene slurry pumping system, one-way flow control can be conducted on fluid with particulate matter under the pressure environment of 100 MPA or above.

Description

Technical Field

[0001] The invention relates to the technical field of graphene slurry pumping, in particular to a multi-unit one-way valve device and a graphene slurry pumping system with the multi-unit one-way valve device. Background Art

[0002] In the industrial preparation process of graphene powder, it is extremely important to use a homogenizer to homogenize the graphene slurry. Therefore, with the continuous improvement of graphene process requirements, the working pressure requirements for graphene slurry are also getting higher and higher. The existing liquid pumps that can pressurize the fluid to more than 100MPA mostly use plunger pump structures. The basic working principle of the existing plunger pump is that the fluid can be pumped out after being sucked with the reciprocating motion of the piston rod and the one-way flow function of the one-way valve. However, the existing plunger pump structure was designed for liquid environments at the beginning, such as the water jet pump for water flow pressurization. The existing ultra-high pressure water jet pump is able to pressurize pure water to more than 100MPA, or even 200MPA. However, when the existing plunger pump is used to pressurize the graphene slurry, the pressure requirement cannot be met. The reason for this is that during the reciprocating motion of the one-way valve in the existing plunger pump, solid particles contained in the fluid will accumulate at the sealing port of the one-way valve when it reciprocates in and out of the one-way valve, making it difficult for the one-way valve to achieve normal sealing. Therefore, using the existing plunger pump, it is impossible to pressurize the fluid containing solid particles to a pressure value that is the same or similar to that of the pure liquid medium. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent: to provide a multi-unit one-way valve device and a graphene slurry pumping system, which can control the one-way flow of a fluid containing particulate matter under a pressure environment above 100 MPA.

[0004] To this end, the first object of the present invention is to propose a multi-unit one-way valve device, including a plurality of valve units arranged in series in the direction of fluid delivery, the valve unit including a valve body with an inlet and an outlet at both ends, a flow channel connecting the inlet and the outlet in the valve body, a valve core assembly that allows the fluid to flow only in the direction of the outlet is provided in the flow channel, and the inlet and outlet in any two adjacent valve units are directly fixedly connected in a detachable manner and are connected to each other. By connecting a plurality of valve units that can realize the one-way valve function in series, it is possible to maintain a good overall sealing performance in the process of delivering a fluid containing particulate matter under a high-pressure environment. In addition, the plurality of valve units are directly fixedly connected, so the structure is more compact, the fluid delivery path is shortened, and the pressure loss is reduced. At the same time, the direct fixed connection method eliminates the need for the intermediate high-pressure pipe, so that the probability of leakage is small in the case of fewer interfaces, the volume occupied is smaller, and the overall equipment cost is lower.

[0005] According to an example of the present invention, a accommodating cavity is provided in the flow channel of the valve body, and the valve core assembly includes a thrust spring, a valve core block, a dynamic seal and a static seal which are arranged in sequence, the valve core block is installed in the accommodating cavity through the groove bottom position of the inlet and slides with the accommodating cavity, the thrust spring is located on the side of the valve core block close to the outlet, the dynamic seal is located on the other side of the valve core block, the static seal is arranged in the inlet, and the outlet in the previous valve unit is abutted against the static seal in the inlet so that the static seal is tightly attached to the groove bottom of the inlet, the static seal has a central through hole, the outlet in the previous valve unit is connected to the central through hole, and the valve core block drives the dynamic seal to move reciprocatingly so that the dynamic seal closes the central through hole of the static seal or the dynamic seal is disengaged from the static seal to form a spacing channel for fluid to pass through. The inlets and outlets in adjacent valve units are directly connected, so that the entire flow channel formed by this can effectively withstand high-pressure environments, especially fluid pressures exceeding 100MPA. At the same time, due to the presence of multiple valve units, the overall sealing is improved, and the one-way flow control effect of the fluid is good.

[0006] According to an example of the present invention, the dynamic seal is a sphere, and the valve core block has a mounting groove for accommodating the dynamic seal.

[0007] According to an example of the present invention, the opening position of the central through hole on the end face of the static seal corresponds to the dynamic seal, and the hardness of the dynamic seal is greater than that of the static seal. After the dynamic seal and the static seal are abutted against each other, due to the difference in hardness between the two, the opening position of the static seal can be compressed and deformed by the passive seal to match the contact surface of the dynamic seal, thereby improving the sealing performance.

[0008] According to an example of the present invention, a gap space for fluid to pass through is reserved between the valve core block and the accommodating chamber, and a connecting channel is provided in the valve core block, one end of the connecting channel is connected to the gap space, and the other end is connected to the outlet.

[0009] According to an example of the present invention, the dynamic seal in the first valve unit is a block structure, the dynamic seal and the static seal have matching conical surfaces, and a sealing ring is provided on the conical surface of the dynamic seal; the dynamic seals in the remaining valve units are all spheres. The dynamic seal of the first valve unit adopts a block structure, and the conical surface and the sealing ring make it have better sealing performance, while the subsequent remaining valve units adopt spherical dynamic seals, so they can have better pressure bearing capacity. The overall sealing performance and pressure bearing capacity of the two valve units are improved when used together, so that they can be used in fluid boosting equipment in higher pressure environments to boost the fluid containing solid particles.

[0010] According to an example of the present invention, the outlet of the first valve unit of any two adjacent valve units is provided with a convex column protruding outward along the axial direction, and the convex column is configured to allow insertion into the inlet of the corresponding second valve unit and to be fixed and sealed with the inner side wall of the inlet, the outlet of the first valve unit is located on the convex column and is connected with the inlet of the second valve unit, the inlet of the first valve unit is provided with an inlet joint, and the inlet joint is provided with a plug having the same structure as the convex column, the inlet interface has a liquid inlet channel connected with the inlet of the first valve unit, and the plug of the inlet joint abuts against the static seal in the valve body. The convex column can not only realize a direct fixed connection between the convex column and the inlet of another adjacent valve unit, but also the convex column can squeeze the static seal in the inlet, and synchronously complete the fixation of the static seal.

[0011] According to an example of the present invention, the end surface of the protruding column is an outwardly convex arc surface, and the arc surface enables the protruding column to be in line contact with the static sealing member, thereby improving the sealing performance.

[0012] According to an example of the present invention, it also includes a cylindrical shell, the front end of the shell has a slurry total outlet, the rear end has a mounting port, each valve unit is sequentially installed in the shell through the mounting port, the mounting port is provided with a detachable mounting base, the mounting base pushes each valve unit to fit tightly in the shell, and the mounting base has a slurry total inlet connected to the inlet of the first valve unit. Through the setting of the shell, multiple valve units can complete the connection between the inlet and outlet of adjacent valve units in a mutually abutting manner, eliminating the setting of the connecting component between the inlet and outlet, and the reliability is higher.

[0013] According to an example of the present invention, the static seal of the rear valve unit of any two adjacent valve units is fixedly connected to the valve body of the front valve unit, and the central through hole of the static seal is communicated with the outlet of the front valve unit.

[0014] The second object of the present invention is to provide a graphene slurry pumping system, including a plunger pump, wherein the plunger pump includes the above-mentioned multi-unit one-way valve device.

[0015] The above technical solution has the following advantages or beneficial effects: first, multiple valve units with one-way valve functions are used in series, which has better sealing performance than a single one-way valve, so it can be applied to the boosting equipment of high-pressure fluid containing solid particles, especially to the plunger pump of graphene slurry exceeding 100MPA; secondly, the inlet and outlet of two adjacent valve units are directly fixedly connected, which reduces the overall length of the pipeline and eliminates the use of high-pressure pipes. Therefore, the pressure loss of high-pressure fluid flowing between the valve units is small, the overall equipment cost is low, and the probability of leakage is smaller; secondly, the dynamic seal of the first valve unit adopts a block structure with a sealing ring to have better sealing performance, while the dynamic seals of the remaining valve units adopt a spherical structure, which has a higher pressure bearing capacity. After the two are matched, the overall sealing performance and pressure bearing capacity are taken into account; finally, multiple valve units are installed through the outer shell, so that the two adjacent valve units can be directly connected by abutting each other, avoiding the additional setting of connecting components between the inlet and outlet of the two valve units, and the overall structure is more solid and the sealing performance is better.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the multi-unit one-way valve device of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure with each valve unit disassembled.

[0019] Figure 3 for Figure 2 A partial enlarged schematic diagram of the "A" area.

[0020] Figure 4 for Figure 2 A partial enlarged schematic diagram of the "B" area in the middle.

[0021] Figure 5 for Figure 2 Schematic diagram of the structure of a single valve unit.

[0022] Figure 6 It is a schematic structural diagram of a multi-unit one-way valve device with a housing of the present invention.

[0023] Among them, 100, valve unit; 200, housing; 201, slurry total outlet; 202, installation port; 300, installation base; 301, slurry total inlet; 1. Valve body; 2. Inlet; 3. Outlet; 4. Accommodating chamber; 4.1. Step surface; 5. Valve core block; 5.1. Mounting groove; 6. Thrust spring; 7. Dynamic seal; 8. Static seal; 8.1. Center through hole; 9. Spacing channel; 10. Gap space; 11. Connecting channel; 12. Sealing ring; 13. Boss; 13.1. Arc surface; 14. Inlet joint; 14.1. Liquid inlet channel; 15. Plug; 16. External sealing ring; 17 / 18. Inspection hole. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The multi-unit one-way valve device and the graphene slurry pumping system according to the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] The fluid hereinafter includes but is not limited to graphene slurry.

[0027] The term "plurality" herein refers to two or more.

[0028] The present invention provides a multi-unit one-way valve device, as shown in the figure, comprising a plurality of valve units 100 arranged in series in sequence along the conveying direction of the fluid, wherein the valve unit 100 comprises a valve body 1 having an inlet 2 and an outlet 3 at both ends respectively, and the valve body 1 has a flow channel connecting the inlet 2 and the outlet 3, and the flow channel is provided with a valve core assembly that allows the fluid to flow only in the direction of the outlet 3, and the inlet 2 and the outlet 3 in any two adjacent valve units 100 are directly fixedly connected in a detachable manner and are connected to each other.

[0029] The series connection in this embodiment means that the outlet 3 of the previous valve unit 100 is connected to the inlet 2 of the next valve unit 100, and so on, so that all the valve units 100 constitute a delivery channel for fluid flow. At this time, any valve unit 100 is connected in series with the adjacent valve unit 100.

[0030] The direct fixed connection in this embodiment means that the valve bodies 1 of the two valve units 100 are directly connected in the process of connecting the outlet 3 of the first valve unit 100 with the inlet 2 of the second valve unit 100, without the need for high-pressure pipes. This method not only shortens the overall path length, reduces the pressure loss during fluid transportation and reduces costs, but also reduces the problem of multiple interfaces caused by the setting of high-pressure pipes, thereby reducing leakage points and the probability of leakage, making the overall equipment operation cost lower.

[0031] In the above embodiment, the valve core assembly realizes a one-way constraint function, that is, when the fluid flows in from the inlet 2 and flows toward the outlet 3, the valve core assembly is in an open state, so that the fluid can pass through the valve core assembly smoothly. On the contrary, when the fluid has a tendency to flow back toward the position of the inlet 2, the valve core assembly switches to a closed state, thereby realizing a one-way flow of the fluid in the valve body. The valve unit 100 with the valve core assembly can be understood as a one-way valve unit. Compared with the single one-way valve in the plunger pump in the prior art, the multi-unit one-way valve device in this embodiment can directly replace the structure of the single one-way valve in the existing plunger pump. By connecting multiple one-way valves in series, the sealing problem is effectively solved. In addition, compared with a single one-way valve, multiple one-way valves can share the pressure after being connected in series, and the pressure borne by each one-way valve will be reduced, so that the life of the one-way valve is longer.

[0032] Based on the preferred embodiment above, the flow channel of the valve body 1 has a receiving cavity 4, such as Figure 1-Figure 2 As shown, the left end of the accommodating chamber 4 is connected with the outlet 3, and the inner diameter of the outlet 3 at the connection point is smaller than the inner diameter of the accommodating chamber 4, thereby forming a step surface 4.1 at the left end of the accommodating chamber 4, and the right end of the accommodating chamber 4 is located at the groove bottom position of the inlet 2, and the inner diameter of the inlet 2 is larger than the inner diameter of the accommodating chamber 4. The valve core assembly includes a thrust spring 6, a valve core block 5, a dynamic seal 7 and a static seal 8 which are arranged in sequence. The valve core block 5 is installed in the accommodating chamber 4 through the groove bottom position of the inlet 2 and slidably cooperates with the accommodating chamber 4. The thrust spring 6 is located on the side of the valve core block 5 close to the outlet 3, and the two ends of the thrust spring 6 are respectively against the step surface 4.1 and the valve core block 5. The dynamic seal 7 is located on the other side of the valve core block 5. The static seal 8 The sealing member 8 is arranged in the inlet 2, and the outlet 3 in the previous valve unit 100 abuts against the static sealing member 8 in the inlet 2, so that the static sealing member 8 is in close contact with the groove bottom of the inlet 2. The static sealing member 8 has a central through hole 8.1, and the outlet 3 in the previous valve unit 100 is connected with the central through hole 8.1. The action of the fluid in the flow channel on the valve core block 5 drives the valve core block 5 to reciprocate along the axial direction of the accommodating chamber 4, and the valve core block 5 drives the dynamic sealing member 7 on the right end of the valve core block 5 to reciprocate synchronously, so that the dynamic sealing member 7 closes the central through hole 8.1 of the static sealing member 8 or the dynamic sealing member 7 is disengaged from the static sealing member 8 to form a spacing channel 9 for fluid to pass through. That is, when the valve core block 5 drives the dynamic seal 7 to move rightward, the dynamic seal 7 abuts against the static seal 8 and blocks the central through hole 8.1 of the static seal 8, thereby achieving the effect of closing the central through hole 8.1; when the valve core block 5 drives the dynamic seal 7 to move leftward, the dynamic seal 7 moves away from the static seal 8, so that a spacing channel 9 for fluid to pass through is reserved between the dynamic seal 7 and the static seal 8.

[0033] Based on the preference of the above embodiment, the dynamic seal 7 is a sphere, and the valve core block 5 is provided with a mounting groove 5 . 1 for accommodating the dynamic seal 7 .

[0034] Furthermore, the central through hole 8.1 is located at an opening position on the end surface of the static seal 8 corresponding to the dynamic seal 7, and the hardness of the dynamic seal 7 is greater than that of the static seal 8. Figure 3 As shown, a sharp annular edge is formed at the connection between the inner wall of the central through hole 8.1 and the left end face of the static seal 8. When the right side of the dynamic seal 7 abuts against the annular edge, the annular edge can be driven to deform due to the high hardness of the dynamic seal 7, and the deformed annular edge is adapted to the outer contour of the dynamic seal 7, thereby further improving the sealing effect.

[0035] Specifically, the dynamic seal 7 is made of ceramic material, and its Rockwell hardness value is HRC90-100. The static seal 8 is made of 630 stainless steel, and its Rockwell hardness value is HRC30-36.

[0036] like Figure 2 As shown, when the valve core block 5 drives the dynamic seal 7 to move to the left and is in an open state, the fluid needs to flow out toward the outlet 3 on the left side of the valve body 1 after passing through the spacing channel 9. Therefore, in order to construct a flow channel between the spacing channel 9 and the outlet 3, the improvement of this embodiment is that a gap space 10 for the fluid to pass through is reserved between the valve core block 5 and the accommodating chamber 4, and a connecting channel 11 is provided in the valve core block 5, one end of the connecting channel 11 is connected to the gap space 10, and the other end passes through the left end face of the valve core block 5 and is connected to the outlet 3.

[0037] like Figure 1~Figure 4 As shown, preferably, the dynamic seal 7 in the first valve unit 100 is a block structure, such as Figure 4 As shown, the dynamic seal 7 has a conical surface, the static seal 8 has a conical surface matching the conical surface on the dynamic seal 7, and a sealing ring 12 is provided on the conical surface of the dynamic seal 7; the dynamic seals 7 in the remaining valve units 100 are all spherical. In this embodiment, the sealing ring 12 is an O-type sealing ring 12, and the dynamic seal 7 with a block structure is used in conjunction with the O-type sealing ring 12, so that the sealing performance between the dynamic seal 7 and the static seal 8 is better than the dynamic seal 7 with a spherical structure. Even if there are a small amount of graphene particles attached to the seal, it can be sealed by the elasticity of the seal and the sealing ring 12, but its pressure bearing capacity is weak and its service life is short, and it is easy to wear out after repeated use. The dynamic seal 7 with a spherical structure has a strong pressure bearing capacity. For this reason, in this embodiment, the dynamic seal 7 in the first valve unit 100 adopts a block structure to ensure the sealing performance, while the remaining valve units 100 adopt a spherical dynamic seal 7 structure, so that the overall pressure bearing performance is high and the equipment operation is more reliable.

[0038] Preferably, the dynamic seal 7 in the first valve unit 100 is a block-shaped structure, and the dynamic seal 7 and the valve core block 5 are an integrated structure.

[0039] Based on the preferred embodiment above, a detection hole 17 is provided on the side wall of the valve body 1, and the detection hole is connected to the position of the inlet 2 corresponding to the static seal 8. Through the detection hole 17, it can be detected whether the fluid in the flow channel leaks out through the fitting surfaces on both sides of the static seal 8.

[0040] Based on one of the preferred examples of two adjacent valve units 100 being directly fixedly connected in the above embodiment: like Figure 1 and Figure 2 As shown, the outlet 3 of the first valve unit 100 of any two adjacent valve units 100 is provided with a boss 13 protruding outward along the axial direction, and the boss 13 is configured to allow insertion into the inlet 2 of the corresponding second valve unit 100 and to be fixed and sealed with the inner wall of the inlet 2, the outlet 3 of the first valve unit 100 is located on the boss 13 and is connected with the inlet 2 of the second valve unit 100, and the inlet 2 of the first valve unit 100 is provided with an inlet connector 14, and the inlet connector 14 is provided with a plug 15 with the same structure as the boss 13, and the inlet interface 14 has a liquid inlet channel 14.1 connected with the inlet 2 of the first valve unit 100, and the plug 15 of the inlet connector 14 abuts against the static seal 8 in the valve body 1.

[0041] Preferably, the boss 13 is an integrated structure with the valve body 1. The size of the boss 13 is adapted to the size of the corresponding inlet 2.

[0042] Specifically, the outer wall of the boss 13 has an outer thread, and the inner wall of the inlet 2 has an inner thread. When the boss 13 is inserted into the corresponding inlet 2, the outer wall of the boss 13 and the inner wall of the inlet 2 are threadedly fixed, and the connection is sealed.

[0043] Based on the above preferred embodiments, Figure 3 Specifically, the right end face of the static seal 8 is a plane, and the arc surface 13.1 of the protruding column 13 abuts against the right end face of the static seal 8, so that the contact mode between the two is line contact, thereby improving the sealing effect.

[0044] Based on the above preferred embodiments, Figure 4As shown, the end surface of the plug 15 that abuts against the static seal 8 has an arc surface with the same structure as the arc surface 13.1 on the convex column 13, that is, the end of the plug 15 located in the inlet of the first valve unit 100 has a convex arc surface 13.1 for abutting against the static seal 8. Specifically, the right end surface of the static seal 8 in the first valve unit 100 is a plane, and the arc surface on the plug 15 abuts against the right end surface of the static seal 8, thereby making the contact mode between the two linear contact, thereby improving the sealing effect.

[0045] Based on the second preferred example of the direct fixed connection of two adjacent valve units 100 in the above embodiment: like Figure 6 As shown, the multi-unit one-way valve device of this embodiment also includes a cylindrical shell 200, the front end of the shell 200 has a total slurry outlet 201, and the rear end has a mounting port 202. Each valve unit 100 is sequentially installed into the shell 200 through the mounting port 202. A detachable mounting base 300 is provided on the mounting port 202. The mounting base 300 pushes each valve unit 100 to fit tightly in the shell 200. The mounting base 300 has a total slurry inlet 301 connected to the inlet 2 of the first valve unit 100.

[0046] Specifically, the mounting base 300 is threadedly connected to the mounting hole 202. As the mounting base 300 is rotated and tightened, the mounting base 300 axially presses the first valve unit 100 inward until all valve units 100 are clamped between the mounting base 300 and the left end surface of the inner cavity of the housing 200. Figure 6 As shown, the mounting base 300 abuts against the static seal 8 in the first valve unit 100 , and the static seal 8 abuts against the inlet 2 at the right end of the valve body 1 .

[0047] Preferably, the static seal 8 of the rear valve unit 100 of any two adjacent valve units 100 is fixedly connected to the valve body 1 of the front valve unit 100, and the central through hole 8.1 of the static seal 8 is communicated with the outlet 3 of the front valve unit 100. Specifically, the static seal 8 and the valve body 1 of the front valve unit 100 are an integrated structure.

[0048] Preferably, an outer sealing ring 16 is provided on the outer side wall of the valve body 1 for sealing the gap between the inner side wall of the housing 200 and the outer side wall of the valve body 1 .

[0049] Preferably, the outer wall of the housing 200 has a plurality of detection holes 18 communicating with the inner cavity of the housing 200, and the plurality of detection holes 18 are respectively communicated with the space between any two adjacent valve units 100 and the space between the mounting base 300 and the first valve unit 100. The detection holes 18 can be used to detect whether the fluid in the flow channel is leaking.

[0050] like Figure 1 and Figure 6 As shown, the valve units 100 are preferably three, and the fluid flow direction of the fluid is from right to left. The valve unit 100 on the right side of the three valve units 100 is the first valve unit 100, and the valve units 100 arranged to the left are the second valve unit 100 and the last valve unit 100. It should be understood that the outlet of the last valve unit 100 does not need to match the inlet of the next valve unit 100. Figure 1 There is no need to add a protruding column 13 to the outlet of the last valve unit 100, so the outlet of the last valve unit 100 can be configured to be compatible with an external interface as required.

[0051] The present invention provides a graphene slurry pumping system, comprising a plunger pump, wherein the plunger pump comprises the multi-unit one-way valve device in the above-mentioned embodiment.

[0052] It should be noted here that in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0058] Various changes and modifications will undoubtedly be apparent to those skilled in the art after reading the above description. Therefore, the appended claims should be regarded as covering all changes and modifications to the true intent and scope of the present invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to still be within the intent and scope of the present invention.

Claims

1. A multi-unit one-way valve device, characterized in that: The invention comprises a plurality of valve units (100) arranged in series in a direction of conveying a fluid, wherein the valve unit (100) comprises a valve body (1) having an inlet (2) and an outlet (3) at two ends respectively, the valve body (1) having a flow channel connecting the inlet (2) and the outlet (3), the flow channel being provided with a valve core assembly that enables the fluid to flow only in the direction of the outlet (3), and the inlet (2) and the outlet (3) in any two adjacent valve units (100) being directly fixedly connected in a detachable manner and being connected to each other.

2. The multi-unit one-way valve device according to claim 1, characterized in that: The flow passage of the valve body has an accommodating chamber (4), and the valve core assembly comprises a thrust spring (6), a valve core block (5), a dynamic seal (7), and a static seal (8) which are arranged in sequence. The valve core block (5) is inserted into the accommodating chamber (4) through the groove bottom position of the inlet (2) and is slidably matched with the accommodating chamber (4). The thrust spring (6) is located on one side of the valve core block (5) close to the outlet (3), the dynamic seal (7) is located on the other side of the valve core block (5), and the static seal (8) is arranged in the inlet (2). The outlet (3) in the previous valve unit (100) is ) abuts against a static seal (8) in the inlet (2) so that the static seal (8) is in close contact with the bottom of the groove of the inlet (2); the static seal (8) has a central through hole (8.1) in it, and the outlet (3) in the previous valve unit (100) is connected to the central through hole (8.1); the valve core block (5) drives the dynamic seal (7) to move back and forth so that the dynamic seal (7) closes the central through hole (8.1) of the static seal (8) or the dynamic seal (7) and the static seal (8) are disengaged to form a spacing channel (9) for fluid to pass through.

3. The multi-unit one-way valve device according to claim 2, characterized in that: The dynamic seal (7) is a sphere, and the valve core block (5) is provided with a mounting groove (5.1) for accommodating the dynamic seal (7).

4. The multi-unit one-way valve device according to claim 3, characterized in that: The central through hole (8.1) is located at an opening position on the end surface of the static seal (8) corresponding to the dynamic seal (7), and the hardness of the dynamic seal (7) is greater than that of the static seal (8).

5. The multi-unit one-way valve device according to claim 2, characterized in that: A gap space (10) for fluid to pass through is left between the valve core block (5) and the accommodating chamber (4), and a connecting channel (11) is provided in the valve core block (5), one end of the connecting channel (11) is in communication with the gap space (10), and the other end is in communication with the outlet (3).

6. The multi-unit one-way valve device according to claim 2, characterized in that: The dynamic seal (7) in the first valve unit (100) is a block-shaped structure, the dynamic seal (7) and the static seal (8) have matching conical surfaces, and a sealing ring (12) is provided on the conical surface of the dynamic seal (7); the dynamic seals (7) in the remaining valve units (100) are all spherical.

7. The multi-unit one-way valve device according to any one of claims 1 to 6, characterized in that: The outlet (3) of the first valve unit (100) of any two adjacent valve units (100) is provided with a convex column (13) protruding outward in the axial direction, the convex column (13) being arranged to allow insertion into the inlet (2) of the corresponding second valve unit (100) and being fixed and sealed to the inner side wall of the inlet (2), the outlet (3) of the first valve unit (100) being located on the convex column (13) and being communicated with the inlet (2) of the second valve unit (100), the inlet (2) of the first valve unit (100) being provided with an inlet connector (14), the inlet connector (14) being provided with a plug (15) having the same structure as the convex column (13), the inlet interface (14) having a liquid inlet channel (14.1) communicating with the inlet (2) of the first valve unit (100), and the plug (15) of the inlet connector (14) being abutted against a static seal (8) in the valve body (1).

8. The multi-unit one-way valve device according to claim 7, characterized in that: The end surface of the convex column (13) is an outwardly convex arc surface (13.1).

9. The multi-unit one-way valve device according to any one of claims 2 to 6, characterized in that: The invention also comprises a cylindrical outer shell (200), wherein the front end of the outer shell (200) has a total slurry outlet (201), and the rear end has a mounting port (202), and each valve unit (100) is sequentially installed into the outer shell (200) through the mounting port, and a detachable mounting base (300) is provided on the mounting port (202), and the mounting base (300) pushes each valve unit (100) to fit tightly into the outer shell (200), and the mounting base (300) has a total slurry inlet (301) connected to the inlet (2) of the first valve unit (100).

10. The multi-unit one-way valve device according to claim 9, characterized in that: The static seal (8) of the rear valve unit (100) of any two adjacent valve units (100) is fixedly connected to the valve body (1) of the front valve unit (100), and the central through hole (8.1) of the static seal (8) is connected to the outlet (3) of the front valve unit (100).

11. A graphene slurry pumping system, comprising a plunger pump, characterized in that: The plunger pump comprises the multi-unit one-way valve device according to any one of claims 1 to 10.

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