Valve core assembly, check valve and ceramic plunger pump

Abstract

The utility model discloses a valve core subassembly, check valve and ceramic plunger pump relates to valve pump technical field, and this valve core subassembly includes valve core, sealing washer, platen and lock cap, and valve core includes rotary core body and the top rod of coaxial connection on rotary core body, and the top rod has the thread section. The sealing washer is sleeved on the top rod, makes the end surface of sealing washer and the end surface pressure joint of one side of valve core close to the top rod, and the outer diameter of sealing washer is greater than the outer diameter of rotary core body. The platen has first threaded hole, and first threaded hole is screwed on the thread section, makes the end surface of platen and the end surface pressure joint of one side of sealing washer away from rotary core body. The lock cap has second threaded hole, and second threaded hole is screwed on the thread section, makes the end surface of lock cap and the end surface pressure joint of one side of platen away from sealing washer, and the thread rotation direction of second threaded hole and first threaded hole is opposite. The valve core subassembly provided by the utility model can prevent the sealing washer on it loose, thereby guaranteeing the performance of valve pump system.

Description

Technical Field

[0001] This utility model belongs to the field of valve and pump technology, specifically a valve core assembly, a check valve, and a ceramic plunger pump. Background Technology

[0002] Currently, ceramic plunger pumps are widely used in the filling of various regular or viscous liquids in the food, pharmaceutical, and chemical industries. They are also suitable for filling corrosive or particulate liquids.

[0003] The ceramic plunger pump is equipped with check valves at its inlet and outlet to control the unidirectional flow of fluid and achieve the pumping function. However, during operation, the valve core in the check valve experiences frequent reciprocating movement and vibration, causing the sealing ring on it to loosen and become inadequate, resulting in reduced delivery pressure or even failure to deliver fluid. This significantly reduces the pump's performance, and this problem urgently needs to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a valve core assembly, a check valve, and a ceramic plunger pump to solve the problem of the sealing ring on the valve core of the check valve being prone to loosening.

[0005] To achieve the above objectives, this utility model provides the following technical solution: In a first aspect, this utility model provides a valve core assembly, comprising: The valve core includes a rotating core and a push rod coaxially connected to the rotating core, the push rod having a threaded section; The sealing ring is fitted onto the push rod, so that the end face of the sealing ring is pressed against the end face of the valve core near the push rod, and the outer diameter of the sealing ring is larger than the outer diameter of the rotating core. The pressure plate has a first threaded hole, which is screwed onto the threaded section, so that the end face of the pressure plate is pressed against the end face of the sealing ring on the side away from the rotating core. The lock cap has a second threaded hole, which is screwed onto the threaded section so that the end face of the lock cap is pressed against the end face of the pressure plate on the side away from the sealing ring, and the thread direction of the second threaded hole is opposite to that of the first threaded hole.

[0006] As a further embodiment of this utility model, the thread on the threaded section is a left-right double-threaded thread, and one of the first threaded hole and the second threaded hole is a left-handed thread that matches the left-right double-threaded thread, and the other is a right-handed thread that matches the left-right double-threaded thread.

[0007] As a further embodiment of this utility model, along the direction away from the rotating core, the threaded segment includes a first threaded segment and a second threaded segment, and the outer diameter of the first threaded segment is larger than the outer diameter of the second threaded segment. The first threaded hole is screwed onto the first threaded section, and the second threaded hole is screwed onto the second threaded section.

[0008] As a further embodiment of this utility model, the pressure plate has a first annular positioning groove on the side facing the sealing ring, and part of the sealing ring is engaged in the first annular positioning groove.

[0009] As a further embodiment of this utility model, the rotating core has a first positioning cone surface on the side near the top rod, and the pressure plate has a first positioning ring groove on the side facing the rotating core, and the first positioning ring groove is connected to the first positioning cone surface.

[0010] As a further embodiment of this invention, the side of the pressure plate away from the sealing ring has a weight-reducing part.

[0011] As a further embodiment of this invention, the rotating core has a second annular positioning groove on the side facing the sealing ring, and part of the sealing ring is engaged in the second annular positioning groove.

[0012] As a further embodiment of this utility model, the outer peripheral wall of the rotating core has a first sealing conical surface; And / or, the outer peripheral wall of the sealing ring has a second sealing cone surface.

[0013] Secondly, this utility model also provides a one-way valve, including a valve body and any of the valve core assemblies provided in the first aspect disposed on the valve body.

[0014] Thirdly, this utility model also provides a ceramic plunger pump, including a pump body and a one-way valve provided in the second aspect disposed on the pump body.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: the valve core assembly includes a valve core, a sealing ring, a pressure plate, and a locking cap. The valve core includes a rotating core and a push rod coaxially connected to the rotating core. The rotating core is used for the opening and closing of the valve port on the one-way valve. The push rod has a threaded section. By fitting the sealing ring onto the push rod, the end face of the sealing ring is pressed against the end face of the valve core near the push rod. The outer diameter of the sealing ring is larger than the outer diameter of the rotating core, and the sealing ring seals the valve port. The pressure plate has a first threaded hole, which is screwed onto the threaded section, so that the end face of the pressure plate is pressed against the end face of the sealing ring on the side away from the rotating core. The locking cap has a second threaded hole, which is screwed onto the threaded section, so that the end face of the locking cap is pressed against the end face of the pressure plate on the side away from the sealing ring. The thread direction of the second threaded hole is opposite to that of the first threaded hole.

[0016] Therefore, according to the valve core assembly provided by this utility model, by pressing the sealing ring with the pressure plate and pressing the pressure plate with the locking cap, when the pressure plate shows a tendency to rotate in the loosening direction, the locking cap is driven to have a tendency to rotate in the tightening direction, thereby playing an anti-loosening role, ensuring sealing performance, thereby ensuring the performance of the one-way valve with this valve core assembly, and further ensuring the performance of the ceramic plunger pump with this one-way valve, making the performance of the ceramic plunger pump more stable and significantly reducing the damage rate. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 A cross-sectional view of the valve core assembly provided by this utility model; Figure 2 An exploded view of the valve core assembly provided by this utility model.

[0019] Figure label: 100. Valve core; 110. Rotary core; 111. First positioning cone surface; 112. Second annular positioning groove; 113. First sealing cone surface; 120. Push rod; 121. Threaded section; 200, sealing ring; 210, second sealing cone surface; 300, Pressure plate; 310, First threaded hole; 320, First annular positioning groove; 330, First positioning ring groove; 340, Weight reduction part; 400, Lock cap; 410, Second threaded hole. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Firstly, please refer to Figure 1-2 As shown, this utility model embodiment provides a valve core assembly, including: The valve core 100 includes a rotating core 110 and a push rod 120 coaxially connected to the rotating core 110, the push rod 120 having a threaded section 121.

[0027] A sealing ring 200 is fitted onto the push rod 120, so that the end face of the sealing ring 200 is pressed against the end face of the valve core 100 near the push rod 120, and the outer diameter of the sealing ring 200 is larger than the outer diameter of the rotating core 110.

[0028] The pressure plate 300 has a first threaded hole 310, which is screwed onto the threaded section 121, so that the end face of the pressure plate 300 is pressed against the end face of the sealing ring 200 on the side opposite to the rotating core 110.

[0029] The lock cap 400 has a second threaded hole 410, which is screwed onto the threaded section 121, so that the end face of the lock cap 400 is pressed against the end face of the pressure plate 300 on the side away from the sealing ring 200, and the thread direction of the second threaded hole 410 is opposite to that of the first threaded hole 310.

[0030] The valve core 100 in this embodiment includes a rotating core 110 and a push rod 120, which can be integrally formed or spliced ​​together. The rotating core 110 is used to cooperate with the valve port on the one-way valve to realize opening or closing, and it can be a rotating plate-shaped or sheet-shaped structure. The push rod 120 is coaxially connected to one end face of the rotating core 110. The push rod 120 is used to move along the axis and is installed on the valve body of the one-way valve. The outer peripheral wall of the push rod 120 has a threaded section 121.

[0031] In this embodiment, the sealing ring 200 is approximately circular in shape and has an installation hole inside. The sealing ring 200 is sleeved on the outer periphery of the push rod 120 and is pressed against the end face of the valve core 100 near the push rod 120. The outer diameter of the sealing ring 200 is larger than the outer diameter of the rotating core 110. Therefore, it can be sealed with the valve port of the one-way valve by elastic compression to prevent fluid from passing through.

[0032] In this embodiment, the pressure plate 300 can be a rotating body structure, with a first threaded hole 310 at its axis that matches the threaded section 121. The pressure plate 300 is screwed onto the threaded section 121 through the first threaded hole 310 and pressed against the end face of the sealing ring 200 on the side opposite to the rotating core 110, so that the sealing ring 200 has a preset pressing elastic force.

[0033] In this embodiment, the locking cap 400 can also be a rotating structure, with a second threaded hole 410 at its axis that matches the threaded section 121, similar to a nut or bolt. The locking cap 400 is screwed onto the threaded section 121 through the second threaded hole 410 and pressed against the end face of the pressure plate 300 on the side opposite to the sealing ring 200. The threads of the second threaded hole 410 and the first threaded hole 310 have opposite directions of rotation. When the pressure plate 300 or the locking cap 400 is rotated in the same direction, one tends to tighten, while the other tends to loosen.

[0034] In this way, when the pressure plate 300 shows a tendency to rotate in the loosening direction, the static friction force drives the locking cap 400 to rotate in the tightening direction, so that neither of them rotates, thus playing an anti-loosening role, ensuring sealing performance, thereby ensuring the performance of the check valve with the valve core assembly, and further ensuring the performance of the ceramic plunger pump with the check valve, making the performance of the ceramic plunger pump more stable and significantly reducing the damage rate.

[0035] In some embodiments, the thread on the threaded segment 121 is a left-hand double-threaded thread, and one of the first threaded hole 310 and the second threaded hole 410 is a left-handed thread that matches the left-hand double-threaded thread, and the other is a right-handed thread that matches the left-hand double-threaded thread.

[0036] That is, such as Figure 1 , Figure 2 As shown, both left-hand and right-hand threads are provided on the same section of the push rod 120. In one example, the first threaded hole 310 is a left-hand thread that matches the left-hand and right-hand double thread, and correspondingly, the second threaded hole 410 is a right-hand thread that matches the left-hand and right-hand double thread. In another example, the first threaded hole 310 is a right-hand thread that matches the left-hand and right-hand double thread, and correspondingly, the second threaded hole 410 is a left-hand thread that matches the left-hand and right-hand double thread.

[0037] In this way, it can meet the screwing requirements of the individual components of the pressure plate 300 or the lock cap 400, as well as the anti-loosening requirements when tightening both, resulting in a more compact structure.

[0038] In other embodiments, along the direction away from the rotating core 110, the threaded segment 121 includes a first threaded segment and a second threaded segment, and the outer diameter of the first threaded segment is larger than the outer diameter of the second threaded segment.

[0039] The first threaded hole 310 is screwed onto the first threaded section, and the second threaded hole 410 is screwed onto the second threaded section.

[0040] Specifically, as not shown in the figure, the first threaded section and the second threaded section have opposite directions of rotation, and the outer diameter of the first threaded section is larger than that of the second threaded section. The first threaded hole 310 matches the first threaded section, and the second threaded hole 410 matches the second threaded section, which also achieves the anti-loosening effect.

[0041] It should be noted that the axial length of the first threaded section should be less than the axial length of the first threaded hole 310, so as to leave space for the second threaded hole 410 to move axially and avoid interference that would prevent it from failing to play its anti-loosening role.

[0042] In some embodiments, the pressure plate 300 has a first annular positioning groove 320 on the side facing the sealing ring 200, and a portion of the sealing ring 200 is engaged in the first annular positioning groove 320.

[0043] Specifically, such as Figure 1 , Figure 2As shown, the lower part of the sealing ring 200 is engaged within the first annular positioning groove 320, ensuring that the sealing ring 200 will not deform arbitrarily under compression, allowing it to expand radially in a predetermined direction under compression, thereby ensuring sealing performance. The specific size and depth of the first annular positioning groove 320 can be determined according to the actual specifications of the sealing ring 200, and are not specifically limited in this embodiment.

[0044] In some embodiments, the rotating core 110 has a first positioning cone surface 111 on the side near the top rod 120, and the pressure plate 300 has a first positioning ring groove 330 on the side facing the rotating core 110. The first positioning ring groove 330 is engaged with the first positioning cone surface 111.

[0045] Specifically, such as Figure 1 , Figure 2 As shown, the cross section of the first positioning cone surface 111 gradually decreases along the direction close to the lock cap 400. When the pressure plate 300 is tightened, it is positioned by the first positioning ring groove 330 cooperating with the first positioning cone surface 111, thereby ensuring the coaxiality of the two and further ensuring that the deformation trend of the sealing ring 200 is controllable.

[0046] Of course, the first positioning cone surface 111 can also be set on the pressure plate 300, and correspondingly, the first positioning ring groove 330 can also be set on the rotating core 110, so that the positioning can also be achieved. This can be determined according to actual needs, and no restrictions are imposed in this embodiment.

[0047] In some embodiments, the pressure plate 300 has a weight-reducing portion 340 on the side opposite to the sealing ring 200. For example, as shown... Figure 1 , Figure 2 As shown, the weight-reducing part 340 is an annular notch. This reduces the overall weight of the valve core assembly, ensuring responsiveness. Of course, the weight-reducing part 340 can also be configured with other structures, such as weight-reducing holes or grooves, depending on actual needs. This embodiment does not impose too many restrictions.

[0048] In some embodiments, the rotating core 110 has a second annular positioning groove 112 on the side facing the sealing ring 200, and a portion of the sealing ring 200 is engaged in the second annular positioning groove 112.

[0049] Specifically, such as Figure 1 , Figure 2 As shown, the upper part of the sealing ring 200 is engaged within the second annular positioning groove 112, which ensures that the sealing ring 200 will not deform arbitrarily under compression, allowing it to expand radially in a predetermined direction under compression, thereby ensuring sealing performance. The specific size and depth of the second annular positioning groove 112 can be determined according to the actual specifications of the sealing ring 200, and are not specifically limited in this embodiment.

[0050] In some embodiments, the outer peripheral wall of the rotating core 110 has a first sealing conical surface 113.

[0051] Specifically, such as Figure 1 , Figure 2 As shown, the cross-section of the first sealing cone 113 gradually increases along the direction close to the locking cap 400. The first sealing cone 113 is used to abut against the inner peripheral wall of the valve port of the one-way valve for initial sealing, and can also serve a positioning function.

[0052] And / or, the outer peripheral wall of the sealing ring 200 has a second sealing cone surface 210.

[0053] Specifically, such as Figure 1 , Figure 2 As shown, along the direction close to the locking cap 400, the cross-section of the second sealing cone 210 gradually increases, and the outer diameter of the second sealing cone 210 is larger than the outer diameter of the first sealing cone 113. The second sealing cone 210 is used to abut against the inner peripheral wall of the valve port on the one-way valve for further sealing. Under the action of surface sealing, the sealing effect is better and more stable.

[0054] Secondly, this utility model embodiment also provides a one-way valve, including a valve body and a valve core assembly of any of the above embodiments disposed on the valve body. The rotating core 110 in the valve core assembly cooperates with the inlet / outlet valve port on the valve body, and the push rod 120 is axially movable and connected to the valve body.

[0055] Therefore, the one-way valve provided in this embodiment of the utility model, by configuring the valve core assembly, when the pressure plate 300 shows a tendency to rotate in the loosening direction, under the action of static friction, drives the locking cap 400 to have a tendency to rotate in the tightening direction, so that neither of them rotates, playing an anti-loosening role, ensuring sealing performance, and thus ensuring the performance of the one-way valve with the valve core assembly.

[0056] Thirdly, this utility model embodiment also provides a ceramic plunger pump, including a pump body and a one-way valve of any of the above embodiments disposed on the pump body.

[0057] Therefore, the ceramic plunger pump provided in this embodiment of the utility model, by configuring a one-way valve, which is configured with a valve core assembly, when the pressure plate 300 shows a tendency to rotate in the loosening direction, under the action of static friction, drives the locking cap 400 to have a tendency to rotate in the tightening direction, so that neither of them rotates, playing an anti-loosening role, ensuring sealing performance, thereby ensuring the performance of the one-way valve with the valve core assembly, and thus ensuring the performance of the ceramic plunger pump with the one-way valve, making the performance of the ceramic plunger pump more stable and significantly reducing the damage rate.

[0058] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A valve core assembly, characterized in that, include: The valve core (100) includes a rotating core (110) and a push rod (120) coaxially connected to the rotating core (110), the push rod (120) having a threaded section (121). A sealing ring (200) is fitted on the push rod (120) so that the end face of the sealing ring (200) is pressed against the end face of the valve core (100) near the push rod (120), and the outer diameter of the sealing ring (200) is larger than the outer diameter of the rotating core (110). A pressure plate (300) has a first threaded hole (310) which is screwed onto the threaded section (121) so that the end face of the pressure plate (300) is pressed against the end face of the sealing ring (200) on the side opposite to the rotating core (110). The lock cap (400) has a second threaded hole (410) which is screwed onto the threaded section (121) so that the end face of the lock cap (400) is pressed against the end face of the pressure plate (300) on the side opposite to the sealing ring (200), and the thread direction of the second threaded hole (410) is opposite to that of the first threaded hole (310).

2. The valve core assembly according to claim 1, characterized in that, The thread on the threaded segment (121) is a left-right double-threaded thread. One of the first threaded hole (310) and the second threaded hole (410) is a left-handed thread that matches the left-right double-threaded thread, and the other is a right-handed thread that matches the left-right double-threaded thread.

3. The valve core assembly according to claim 1, characterized in that, Along the direction opposite to the rotating core (110), the threaded segment (121) includes a first threaded segment and a second threaded segment, and the outer diameter of the first threaded segment is larger than the outer diameter of the second threaded segment; The first threaded hole (310) is screwed onto the first threaded segment, and the second threaded hole (410) is screwed onto the second threaded segment.

4. The valve core assembly according to any one of claims 1 to 3, characterized in that, The pressure plate (300) has a first annular positioning groove (320) on the side facing the sealing ring (200), and part of the sealing ring (200) is engaged in the first annular positioning groove (320).

5. The valve core assembly according to any one of claims 1 to 3, characterized in that, The rotating core (110) has a first positioning cone surface (111) on the side near the top rod (120), and the pressure plate (300) has a first positioning ring groove (330) on the side facing the rotating core (110). The first positioning ring groove (330) is connected to the first positioning cone surface (111).

6. The valve core assembly according to any one of claims 1 to 3, characterized in that, The pressure plate (300) has a weight-reducing part (340) on the side opposite to the sealing ring (200).

7. The valve core assembly according to any one of claims 1 to 3, characterized in that, The rotating core (110) has a second annular positioning groove (112) on the side facing the sealing ring (200), and part of the sealing ring (200) is engaged in the second annular positioning groove (112).

8. The valve core assembly according to any one of claims 1 to 3, characterized in that, The outer peripheral wall of the rotating core (110) has a first sealing cone surface (113). And / or, the outer peripheral wall of the sealing ring (200) has a second sealing cone surface (210).

9. A one-way valve, characterized in that, It includes a valve body and a valve core assembly as described in any one of claims 1 to 8 disposed on the valve body.

10. A ceramic plunger pump, characterized in that, It includes a pump body and a one-way valve as described in claim 9 disposed on the pump body.

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