Double-guided lift check valve

Abstract

The utility model relates to a double -directed lift type check valve, including valve body, gland, valve clack and spring, the gland sets up in the valve body export end, the valve clack is respectively fixedly connected with the coaxial first valve rod and second valve rod on the face of valve body export end and import end direction, the valve body import end is provided with the support plate, first valve rod and second valve rod are respectively threaded and set in the first sliding hole and the second sliding hole that have been set up on the support plate and the gland, the spring is sleeved on the first valve rod between the gland and valve clack. This double -directed lift type check valve provides the two -way support guiding effect for the movement of valve clack in the direction of valve clack towards valve body import end and export end respectively, guarantees the stability when valve clack moves, thereby has guaranteed the stability when check valve uses.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a double-guided lifting check valve. Background Technology

[0002] A lift check valve, also known as a non-return valve, one-way valve, backflow valve, or back pressure valve, allows fluid to flow in only one direction. Existing technology, such as the utility model patent "A Lift-Type Wafer Check Valve" (publication number: CN204878889U), discloses a structure where the valve disc slidably passes through a gland via a valve stem. The valve disc's reset is achieved by the spring force. In this structure, the support and guidance of the valve disc as it slides within the valve body are provided by the gland's support and guidance of one end of the valve stem. This places high demands on the precision of the fit between the valve stem and the gland, requiring high machining accuracy during production and increasing production costs. If the machining accuracy is insufficient, a large gap exists at the sliding fit position between the valve stem and the gland. When the valve stem slides on the gland, it may jam, preventing the valve disc from resetting to the sealing position, leading to valve leakage, or even damage to the sealing surface, rendering the valve unusable. Especially when the check valve is installed horizontally, the weight of the valve disc and stem makes it more prone to jamming with the gland. Utility Model Content

[0003] In view of this, the purpose of this utility model is to propose a dual-guide lifting check valve to solve the above problems.

[0004] For the purposes described above, this utility model provides

[0005] A dual-guided lifting check valve includes a valve body, a gland, a valve disc, and a spring. The gland is disposed inside the outlet end of the valve body. A first valve stem and a second valve stem are fixedly connected to the surfaces of the valve disc facing the outlet end and the inlet end of the valve body, respectively. A support plate is disposed at the inlet end of the valve body. The first valve stem and the second valve stem pass through a first sliding hole and a second sliding hole respectively provided in the gland and the support plate. The spring is sleeved on the first valve stem and located between the gland and the valve disc.

[0006] Preferably, the valve body is provided with a first connector and a second connector at the inlet and outlet ends, respectively, and the first connector and the second connector abut against the inlet and outlet ends of the valve body and are fastened by bolts.

[0007] Preferably, sealing rings are provided between the first connector and the valve body, and between the second connector and the valve body.

[0008] Preferably, the first connector has two mounting grooves on its end face facing the valve body that match the end of the support plate. The two ends of the support plate are respectively placed in the two mounting grooves and held in place by the valve body end face.

[0009] Preferably, a positioning protrusion is formed on the end face of the first connector facing the valve body, and a positioning ring groove matching the positioning protrusion is formed on the end face of the valve body, with the positioning protrusion remaining within the positioning ring groove.

[0010] Preferably, the first valve stem and the second valve stem are integrally formed on the valve disc.

[0011] Preferably, a limiting block is screwed to the end of the second valve stem, and the outer diameter of the limiting block is larger than the inner diameter of the second sliding hole.

[0012] The beneficial effects of this utility model are as follows: while the valve disc moves within the valve body, the first valve stem and the second valve stem slide within the first and second sliding holes of the gland and the support plate, respectively. Through the cooperation between the first valve stem and the gland and the second valve stem and the support plate, bidirectional support and guidance are provided for the movement of the valve disc on both sides. Even if there is a certain gap between the first valve stem and the gland and the second valve stem and the support plate, or when the valve is installed and used horizontally, the valve disc can still move stably within the valve body without jamming, thus ensuring the stability of the check valve during use. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic cross-sectional view of the present invention;

[0015] Figure 2 This is a cross-sectional schematic diagram from another perspective of the present invention;

[0016] Figure 3 This is an exploded view of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the valve disc, the first valve stem, the second valve stem, and the limiting block in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the first connector and the support plate in this utility model.

[0019] The diagram is marked as follows:

[0020] 1. Valve body; 11. Positioning ring groove; 2. Gland; 21. First sliding hole; 3. Valve disc; 31. First valve stem; 32. Second valve stem; 33. Limiting block; 4. Spring; 5. Support plate; 51. Second sliding hole; 6. First connector; 61. Mounting groove; 62. Positioning convex ring; 7. Second connector; 8. Sealing ring. Detailed Implementation

[0021] 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 specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figure 1-5 As shown, a dual-guided lifting check valve includes a valve body 1, a pressure cap 2, a valve disc 3, and a spring 4. The pressure cap 2 is screwed into the outlet end of the valve body 1. The valve disc 3 has a coaxial first valve stem 31 and a second valve stem 32 fixedly connected to its surfaces facing the outlet and inlet ends of the valve body 1, respectively. A support plate 5 is provided at the inlet end of the valve body 1. The first valve stem 31 and the second valve stem 32 pass through the first sliding hole 21 and the second sliding hole 51 opened on the pressure cap 2 and the support plate 5, respectively. The spring 4 is sleeved on the first valve stem 31 and located between the pressure cap 2 and the valve disc 3.

[0024] In the above structure, when fluid enters the valve body 1 through the inlet end, it pushes the valve disc 3 towards the outlet end of the valve body 1 to open the valve, allowing the fluid to flow out through the outlet end of the valve body 1 after passing through it. After the fluid entering the inlet end of the valve body 1 is stopped, the valve disc 3 moves towards the inlet end of the valve body 1 under the action of the spring 4 to seal with the valve body 1, achieving a one-way shut-off function. While the valve disc 3 moves inside the valve body 1, the first valve stem 31 and the second valve stem 32 slide within the first sliding hole 21 and the second sliding hole 51 of the pressure plate 2 and the support plate 5, respectively. Through the cooperation of the first valve stem 31 with the pressure plate 2 and the second valve stem 32 with the support plate 5, the movement of the valve disc 3 is provided bidirectionally on both sides. Even if there is a certain clearance between the first valve stem 31 and the pressure plate 2 and the second valve stem 32 and the support plate 5, or when the valve is installed and used horizontally, the valve disc 3 can still move stably inside the valve body 1 without jamming, thus ensuring the stability of the check valve during use.

[0025] Furthermore, based on the above structure, the inlet and outlet ends of the valve body 1 are respectively provided with a first connector 6 and a second connector 7. The first connector 6 and the second connector 7 abut against the inlet and outlet ends of the valve body 1 and are fastened with bolts. The first connector 6 and the second connector 7 are used to connect the inlet and outlet ends of the valve body 1 to the pipeline. According to the connection requirements of the pipeline, the first connector 6 and the second connector 7 with different styles such as external thread, internal thread, and plug-in protrusion ring are provided at the end of the valve body 1 to facilitate the connection when the valve is used.

[0026] In addition, based on the above structure, sealing rings 8 are provided between the first connector 6 and the valve body 1 and between the second connector 7 and the valve body 1. The sealing rings 8 enhance the sealing between the first connector 6 and the second connector 7 and the valve body 1, thereby enhancing the overall sealing of the check valve.

[0027] Furthermore, based on the above structure, two mounting grooves 61 matching the ends of the support plate 5 are formed on the end face of the first connector 6 facing the valve body 1. The two ends of the support plate 5 are respectively placed in the two mounting grooves 61 and held in the mounting grooves 61 by the end face of the valve body 1. That is, the first connector 6 cooperates with the valve body 1 to clamp and hold the two ends of the support plate 5 in the mounting grooves 61. The limitation applied to the support plate 5 by the mounting grooves 61 realizes the setting of the support plate 5 at the inlet end of the valve body 1. In this way, the support plate 5 can be processed and formed separately, which is easier to process and has a different assembly and disassembly direction. Moreover, there is no need to modify the existing valve body 1. The support plate 5 can be fastened by setting the first connector 6, which effectively reduces the production cost.

[0028] Furthermore, based on the above structure, a positioning protrusion 62 is formed on the end face of the first connector 6 facing the valve body 1, and a positioning ring groove 11 matching the positioning protrusion 62 is formed on the end face of the valve body 1. The positioning protrusion 62 is held in the positioning ring groove 11. Through the cooperation between the positioning protrusion 62 and the positioning groove, a positioning function is provided for the operation of the first connector 6 when it is set at the end of the valve body 1, ensuring that the first connector 6 and the valve body 1 are aligned. This also ensures that the second sliding hole 51 on the support plate 5, which is limited by the mounting groove 61 on the first connector 6, is aligned with the first sliding hole 21. This, in conjunction with the first valve stem 31 and the second valve stem 32, provides a more stable support and guidance for the movement of the valve disc 3, thereby ensuring the stability of the check valve during use.

[0029] Furthermore, based on the above structure, the first valve stem 31 and the second valve stem 32 are integrally formed on the valve disc 3, ensuring the stability of the connection between the first valve stem 31 and the second valve stem 32 and the valve disc 3, and ensuring the coaxiality of the first valve stem 31 and the second valve stem 32. This ensures that when the first valve stem 31 and the second valve stem 32 cooperate with the pressure cap 2 and the support plate 5 respectively, they provide stable support and guidance for the movement of the valve disc 3, thereby ensuring the stability of the check valve during use.

[0030] Furthermore, based on the above structure, a limiting block 33 is screwed to the end of the second valve stem 32. The outer diameter of the limiting block 33 is larger than the inner diameter of the second sliding hole 51. The limiting block 33 restricts the maximum stroke of the valve disc 3 when it is impacted by fluid and moves towards the outlet end of the valve body 1. This prevents the valve disc 3 from being subjected to excessive fluid impact, which would cause the second valve stem 32 to move excessively and dislodge from the second sliding hole 51, thereby ensuring the stability of the check valve during use.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0032] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-guided lifting check valve, comprising a valve body (1), a gland (2), a valve disc (3), and a spring (4), wherein the gland (2) is disposed within the outlet end of the valve body (1), characterized in that: The valve disc (3) is fixedly connected to the first valve stem (31) and the second valve stem (32) on the surface facing the outlet end and the inlet end of the valve body (1), respectively. The inlet end of the valve body (1) is provided with a support plate (5). The first valve stem (31) and the second valve stem (32) are respectively inserted into the first sliding hole (21) and the second sliding hole (51) opened on the pressure cover (2) and the support plate (5). The spring (4) is sleeved on the first valve stem (31) and located between the pressure cover (2) and the valve disc (3).

2. The dual-guide lifting check valve according to claim 1, characterized in that: The valve body (1) is provided with a first connector (6) and a second connector (7) at its inlet and outlet ends, respectively. The first connector (6) and the second connector (7) are respectively abutted against the inlet and outlet ends of the valve body (1) and fastened with bolts.

3. The dual-guide lifting check valve according to claim 2, characterized in that: A sealing ring (8) is provided between the first connector (6) and the valve body (1) and between the second connector (7) and the valve body (1).

4. The dual-guide lifting check valve according to claim 2, characterized in that: The first connector (6) has two mounting grooves (61) on its end face facing the valve body (1) that match the end of the support plate (5). The two ends of the support plate (5) are respectively placed in the two mounting grooves (61) and held in the mounting grooves (61) by the end face of the valve body (1).

5. The dual-guide lifting check valve according to claim 4, characterized in that: A positioning protrusion ring (62) is formed on the end face of the first connector (6) facing the valve body (1), and a positioning ring groove (11) matching the positioning protrusion ring (62) is formed on the end face of the valve body (1), and the positioning protrusion ring (62) is held in the positioning ring groove (11).

6. The dual-guide lift check valve according to claim 1, characterized in that: The first valve stem (31) and the second valve stem (32) are integrally formed on the valve disc (3).

7. The dual-guide lifting check valve according to claim 1, characterized in that: The end of the second valve stem (32) is screwed with a limiting block (33), the outer diameter of which is larger than the inner diameter of the second sliding hole (51).

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