A check valve core

Abstract

The utility model provides a check valve core belongs to check valve technical field, it has solved the problem that one -way conduction function of existing check valve is poor. This check valve core includes core stem, spring, platen, first sealing ring and the connecting body that is tubular, has the water through hole that supplies water in connecting body, core stem is worn and is established in connecting body, one end of core stem is fixedly connected with platen through bolt, the other end is connected with first sealing ring and is set up, spring is set up on core stem, and both ends of spring act on connecting body and platen respectively make first sealing ring always have the tendency of sealing abutting on connecting body and blocking water through hole. This check valve core has the advantages that good sealing, guarantee the one -way conduction function of check valve core.

Description

Technical Field

[0001] This utility model belongs to the field of check valve technology and relates to a check valve core. Background Technology

[0002] A check valve is an automatic valve whose core function is to prevent backflow of the medium and ensure that the medium flows in one direction in the pipeline. The check valve opens and closes automatically by the force generated by the flow of the medium itself, without the need for an external driving device. It is widely used in chemical, petroleum, water supply, construction and other fields.

[0003] Existing check valves, such as the tubular check valve disclosed in Chinese patent literature [Patent No.: 202220560499.1; Application Publication No.: CN216975894U], adopt a split valve seat structure, including a front valve seat, a sealing ring, a rear valve seat, a valve core, a spring, a guide rod, an anti-rotation washer, and an anti-rotation nut. The front valve seat is located on the fluid medium inlet side, and the fluid medium inlet side is machined with internal threads for connecting external connectors. The side near the fluid medium outlet has external threads and is screwed to the rear valve seat. The rear valve seat is located on the fluid medium outlet side, and the side near the fluid medium inlet has internal threads that mate with the external threads of the front valve seat. A sealing ring mounting groove is provided on the end face near the fluid medium inlet side. The rear valve seat has internal threads on the side near the fluid medium outlet for installing the guide rod, and can also be used to connect other parts such as connectors in the system.

[0004] When assembling this type of tubular check valve, the front and rear valve seats are first connected by threads. Then, the valve core, spring, guide rod, and anti-return washer are placed into the front and rear valve seats. Finally, the anti-return nut is rotated with a tool to install the valve core, spring, guide rod, and anti-return washer into the appropriate position. The valve core abuts against the front valve seat under the action of the spring force to form a seal. This sealing method is a hard contact seal, which has a poor sealing effect and makes the one-way conduction function of the check valve poor. Summary of the Invention

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a check valve core. The technical problem to be solved is how to improve the sealing performance of the check valve core and ensure its one-way conduction function.

[0006] The objective of this utility model can be achieved through the following technical solution: A check valve core, comprising a core rod and a spring, characterized in that it further comprises a pressure plate, a first sealing ring, and a cylindrical connecting body, wherein the connecting body has a water passage hole for water supply, the core rod is inserted into the connecting body, one end of the core rod is fixedly connected to the pressure plate by bolts, and the other end is fitted and fixedly connected to the first sealing ring, the spring is fitted on the core rod, and the two ends of the spring act on the connecting body and the pressure plate respectively, so that the first sealing ring always has the tendency to seal against the connecting body and block the water passage hole.

[0007] During assembly, first, the first sealing ring is fixed to the other end of the core rod. Then, one end of the core rod is passed through the connecting body, so that the core rod is inserted into the connecting body. Next, the spring is inserted from one end of the core rod. Then, the pressure plate is detachably connected to one end of the core rod by bolts, so that the two ends of the spring act on the connecting body and the pressure plate respectively. This makes the first sealing ring always tend to seal against the connecting body and block the water passage. Through the sealing of the first sealing ring, the check valve core is closed, improving the sealing performance of the check valve core and ensuring the one-way conduction function of the check valve core.

[0008] In the aforementioned check valve core, the connecting body includes a guide cylinder through which the core rod passes. A plurality of first guide strips are evenly spaced protruding on the inner wall of the guide cylinder, and a plurality of second guide strips are evenly spaced protruding on the outer wall of the core rod. Both the first and second guide strips are axially aligned with the check valve core. The first guide strips are located between two adjacent second guide strips, and the second guide strips are located between two adjacent first guide strips. Both the first and second guide strips serve a guiding function, causing the core rod to move in a predetermined direction and improving its stability.

[0009] In the aforementioned check valve core, there is a gap between the first guide bar and each of the two adjacent second guide bars, and a gap between the second guide bar and each of the two adjacent first guide bars. This structure gives the core rod a certain degree of circumferential freedom, which can reduce contact friction, reduce wear, and improve the sensitivity of guiding and conducting.

[0010] In one type of check valve core described above, the spring is sleeved outside the guide cylinder, and the inner diameter of the spring is slightly larger than the outer diameter of the guide cylinder. This structure allows the spring to be positioned using the guide cylinder, improving the spring's stability and thus enhancing the stability of the check valve core. The slightly larger dimension can be 1 mm.

[0011] In the aforementioned check valve core, an annular abutment ring protrudes inward from the inner wall of the connecting body. The abutment ring and the guide cylinder are fixedly connected by several spaced-apart connecting rods. A water passage hole is located between two adjacent connecting rods. The first sealing ring, under the action of a spring, abuts against the abutment ring to block the water passage hole. This structure makes the check valve core design more rational, giving it better unidirectional flow control.

[0012] In one of the aforementioned check valve cores, the spring abuts against the connecting rod.

[0013] In one type of check valve core described above, the bolt is arranged axially along the core rod. This structure facilitates the bolt securing the pressure plate to the core rod.

[0014] In one type of check valve core described above, a second sealing ring is fitted onto the outer peripheral wall of the connecting body. This structure allows the check valve core to be installed in a pipeline, and the second sealing ring seals the gap between the check valve core and the pipeline, enabling the check valve core to achieve unidirectional flow function.

[0015] Compared with the prior art, the check valve core provided by this utility model has the following advantages:

[0016] 1. This check valve core ensures that the first sealing ring always tends to seal against the connecting body and block the water passage. By sealing with the first sealing ring, the check valve core is closed, improving the sealing performance of the check valve core and ensuring the one-way conduction function of the check valve core.

[0017] 2. The first and second guide bars of this check valve core both serve a guiding function, causing the core rod to move in the set direction and improving the stability of the core rod. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overall structure of the check valve core.

[0019] Figure 2 This is an exploded view of the overall structure of the check valve core.

[0020] In the diagram, 1 is the core rod; 11 is the second guide bar; 2 is the spring; 3 is the pressure plate; 4 is the first sealing ring; 5 is the connecting body; 51 is the water passage hole; 52 is the guide cylinder; 53 is the first guide bar; 54 is the abutment ring; 55 is the connecting rod; 6 is the bolt; and 7 is the second sealing ring. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 , Figure 2 As shown, the check valve core includes a core rod 1, a spring 2, a pressure plate 3, a first sealing ring 4, a connecting body 5, a bolt 6, and a second sealing ring 7.

[0023] The connecting body 5 is cylindrical, with an annular abutment ring 54 protruding inward on its inner sidewall. The connecting body 5 contains a guide cylinder 52. In this embodiment, the abutment ring 54 and the guide cylinder 52 are fixedly connected by four spaced-apart connecting rods 55. A water passage hole 51 is provided between adjacent connecting rods 55 for water supply. In actual production, the number of connecting rods 55 can be three or six. A second sealing ring 7 is fitted onto the outer peripheral wall of the connecting body 5.

[0024] One end of the core rod 1 is fixed to a pressure plate 3 by a bolt 6, which is arranged along the axial direction of the core rod 1. The other end of the core rod 1 is fitted with a first sealing ring 4. The core rod 1 passes through the guide cylinder 52. In this embodiment, four first guide bars 53 are evenly spaced protruding on the inner side wall of the guide cylinder 52, and four second guide bars 11 are evenly spaced protruding on the outer side wall of the core rod 1. Both the first guide bars 53 and the second guide bars 11 are arranged along the axial direction of the check valve core. The first guide bars 53 are located between two adjacent second guide bars 11, and the second guide bars 11 are located between two adjacent first guide bars 53. There is a gap between the first guide bars 53 and the two adjacent second guide bars 11, and there is a gap between the second guide bars 11 and the two adjacent first guide bars 53. In actual production, the number of first guide bars 53 and second guide bars 11 is six or eight.

[0025] Spring 2 is sleeved on core rod 1 and outside guide cylinder 52. The inner diameter of spring 2 is slightly larger than the outer diameter of guide cylinder 52. The two ends of spring 2 act on connecting rod 55 and pressure plate 3 respectively, so that the first sealing ring 4 always has the tendency to seal against the connecting body 5, block the water passage hole 51, and close the check valve core.

[0026] During assembly, the first sealing ring 4 is first fitted and fixed to the other end of the core rod 1. Then, one end of the core rod 1 is passed through the guide cylinder 52, so that the core rod 1 is inserted into the connecting body 5. Next, the spring 2 is fitted from one end of the core rod 1. Then, the pressure plate 3 is detachably connected to one end of the core rod 1 by bolt 6, so that the two ends of the spring 2 act on the connecting rod 55 and the pressure plate 3 respectively, so that the first sealing ring 4 always has the tendency to seal against the connecting body 5 and block the water passage hole 51.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0028] Although this document frequently uses terms such as core rod 1, second guide strip 11, spring 2, pressure plate 3, first sealing ring 4, connecting body 5, water passage hole 51, guide cylinder 52, first guide strip 53, abutment ring 54, connecting rod 55, bolt 6, and second sealing ring 7, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A check valve core, comprising a core rod (1) and a spring (2), characterized in that, It also includes a pressure plate (3), a first sealing ring (4) and a cylindrical connecting body (5). The connecting body (5) has a water passage hole (51) through which water is supplied. The core rod (1) passes through the connecting body (5). One end of the core rod (1) is fixed to the pressure plate (3) by a bolt (6), and the other end is fitted with and fixed to the first sealing ring (4). The spring (2) is fitted on the core rod (1). The two ends of the spring (2) act on the connecting body (5) and the pressure plate (3) respectively, so that the first sealing ring (4) always has the tendency to seal against the connecting body (5) and block the water passage hole (51).

2. A check valve core according to claim 1, characterized in that, The connecting body (5) has a guide cylinder (52), the core rod (1) passes through the guide cylinder (52), and a plurality of first guide strips (53) are provided at equal intervals on the inner side wall of the guide cylinder (52), and a plurality of second guide strips (11) are provided at equal intervals on the outer side wall of the core rod (1). The first guide strips (53) and the second guide strips (11) are both arranged along the axial direction of the check valve core. The first guide strip (53) is located between two adjacent second guide strips (11), and the second guide strip (11) is located between two adjacent first guide strips (53).

3. A check valve core according to claim 2, characterized in that, There is a gap between the first guide bar (53) and the two adjacent second guide bars (11), and there is a gap between the second guide bar (11) and the two adjacent first guide bars (53).

4. A check valve core according to claim 2 or 3, characterized in that, The spring (2) is sleeved on the outside of the guide cylinder (52), and the inner diameter of the spring (2) is slightly larger than the outer diameter of the guide cylinder (52).

5. A check valve core according to claim 2 or 3, characterized in that, The inner wall of the connector (5) has an inwardly protruding ring (54) forming an annular abutment ring. The abutment ring (54) and the guide cylinder (52) are fixedly connected by several spaced connecting rods (55). There is a water passage hole (51) between two adjacent connecting rods (55). The first sealing ring (4) can abut against the abutment ring (54) and block the water passage hole (51) under the action of the spring (2).

6. A check valve core according to claim 5, characterized in that, The spring (2) abuts against the connecting rod (55).

7. A check valve core according to claim 1, 2, or 3, characterized in that, The bolt (6) is arranged along the axial direction of the core rod (1).

8. A check valve core according to claim 1, 2, or 3, characterized in that, A second sealing ring (7) is fitted on the outer peripheral wall of the connector (5).

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