Sealing structure of water seal check valve

Abstract

The utility model discloses a sealing structure of a water seal check valve, and relates to the technical field of water seal check valves. The sealing device comprises a valve body, the top of the valve body is fixedly connected with a valve cover, and through mutual cooperation of a first sealing ring, a telescopic plate, an L-shaped thrust plate, a locking plate, a locking opening, a telescopic spring and other components arranged in the sealing device, when the L-shaped thrust plate is pulled leftwards to a certain degree, the L-shaped thrust plate is locked, and the telescopic spring is locked. When the locking plate is reset, a user loosens the handle, the telescopic spring enables the L-shaped thrust plate to face rightwards due to telescopic force, the L-shaped thrust plate is inserted into a locking opening in the locking plate when facing rightwards, the water inlet input pipe and the water inlet pipe are fixedly connected, and the sealing effect between the water inlet input pipe and the water inlet pipe is improved. The sealing effect is achieved, the overall sealing performance of the valve body is better, meanwhile, the water inlet input pipe is convenient to disassemble, and the first sealing ring can be replaced.

Description

Technical Field

[0001] This utility model belongs to the technical field of water-sealed check valves, and in particular relates to the sealing structure of water-sealed check valves. Background Technology

[0002] A water-sealed check valve, also known as a water-sealed non-return valve, is a valve used to prevent the backflow of liquid in a pipeline. It achieves a seal through a water seal, thereby preventing liquid from flowing back and contaminating the pipeline.

[0003] According to a public disclosure (publication number: CN 213629124 U), a check valve with good sealing performance includes a check valve body, an installation interface, and a water outlet. The installation interface and the water outlet are located on opposite sides of the check valve body and are both connected to the check valve body. An adjustment device for adjusting the water outlet angle is provided between the check valve body and the installation interface. The adjustment device includes an installation ring fixed to the inner wall of the check valve body. An arc-shaped groove is formed on the side wall of the installation ring facing the installation interface, and a first conical surface is formed on the top side wall of the arc-shaped groove. This design is simple to operate and convenient to implement, allowing the check valve to be adjusted to various angles even after being fixed on the installation pipe, adapting to different water outlet angle requirements and improving the practicality of the backflow valve.

[0004] However, in the above application, the components such as the installation interface, water outlet, installation ring, arc groove and first conical surface work together, making it difficult to replace the sealing ring. This can lead to damage to the sealing ring after long-term use, reducing the sealing effect between the two components, and needs to be improved. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing structure for a water-sealed check valve. Through the coordinated operation of components such as a first sealing ring, a telescopic plate, an L-shaped thrust plate, a locking plate, a locking port, and a telescopic spring within the sealing device, when the L-shaped thrust plate is pulled to the left to a certain extent, the return spring, due to its elasticity, can reset the locking plate. When the locking plate resets, the user releases the handle, and the telescopic spring, due to its extension force, causes the L-shaped thrust plate to move to the right. When the L-shaped thrust plate moves to the right, it inserts into the locking port on the locking plate, fixing the water inlet pipe to the water inlet pipe, thus improving the sealing effect between the two and achieving a better overall sealing performance of the valve body. Simultaneously, it facilitates the disassembly of the water inlet pipe and allows for the replacement of the first sealing ring, solving existing problems.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a water seal check valve sealing structure, including a valve body, a valve cover fixedly connected to the top of the valve body, an inlet pipe fixedly connected to the side of the valve body, a drain pipe fixedly connected to the side of the valve body, and a sealing device provided on the circumferential surface of the inlet pipe.

[0008] The sealing device includes a water inlet pipe, the inner wall of which is disposed on the circumferential surface of the water inlet pipe, a first placement ring is fixedly connected to the inner wall of the water inlet pipe, a first placement groove is formed on the inner wall of the first placement ring, and a first sealing ring is fixedly connected to the inner wall of the first placement groove.

[0009] Furthermore, a drain inlet pipe is provided on the circumferential surface of the drain pipe, and a second placement ring is fixedly connected to the inner wall of the drain inlet pipe. A second placement groove is formed on the inner wall of the second placement ring, and a second sealing ring is fixedly connected to the inner wall of the second placement groove. The second placement groove is for placing the second sealing ring. The second sealing ring is used to form a seal between the drain pipe and the drain inlet pipe, thereby improving the overall sealing effect of the valve body.

[0010] Furthermore, a placement plate is fixedly connected to the circumferential surface of the water inlet pipe, a telescopic plate is fixedly connected to the side of the placement plate, an L-shaped thrust plate is fixedly connected to the telescopic tube of the telescopic plate, and a handle is fixedly connected to the side of the L-shaped thrust plate. The placement plate is for placing the telescopic plate, the L-shaped thrust plate is for pushing the locking plate, and the water inlet pipe is fixedly connected to the water inlet pipe. The handle is for pulling the telescopic plate.

[0011] Furthermore, a locking plate is passed through the circumferential surface of the water inlet pipe. The side of the locking plate is slidably connected to the circumferential surface of the water inlet pipe. A locking port is provided on the side of the locking plate. A reset plate is fixedly connected to the side of the locking plate. A reset spring is fixedly connected to the side of the reset plate. One end of the reset spring is fixedly connected to the circumferential surface of the water inlet pipe. The locking plate and the locking port are for inserting the L-shaped thrust plate into the locking port to lock the L-shaped thrust plate. The reset spring is for resetting the locking plate.

[0012] Furthermore, a telescopic spring is fixedly connected to the side of the placement plate, and one end of the telescopic spring is fixedly connected to the side of the L-shaped thrust plate. The telescopic spring is used to allow the L-shaped thrust plate to enter the locking slot by utilizing the telescopic force of the telescopic spring.

[0013] Furthermore, a first fixing ring is fixedly connected to the circumferential surface of the water inlet pipe, a threaded rod is fixedly connected to the side of the first fixing ring, a locking nut is threaded onto the circumferential surface of the threaded rod, a second fixing ring is fixedly connected to the circumferential surface of the water inlet pipe, and an insertion hole is provided on the side of the second fixing ring. The threaded rod and the locking nut are used to fix the first fixing ring and the second fixing ring together, and the insertion hole is used to insert the threaded rod.

[0014] Furthermore, the L-shaped thrust plate is L-shaped with its side surface sloping, and the locking plate is rectangular with its side surface sloping. The sloping surface of the locking plate is located on the displacement trajectory of the sloping surface of the L-shaped thrust plate. Several placement plates, telescopic plates, L-shaped thrust plates, locking plates, and telescopic springs are arranged in a circular array along the side circumference of the water inlet pipe. Two sets of placement plates, telescopic plates, L-shaped thrust plates, locking plates, and telescopic springs are arranged symmetrically along the vertical central axis of the valve body. The threaded rod and lock... Several nuts and insertion holes are provided and arranged in a circumferential array along the side of the first fixing ring. Two sets of the first fixing ring and the second fixing ring are provided and are symmetrical to each other along the vertical central axis of the valve body. The side shapes of the L-shaped thrust plate and the locking plate are both set as inclined surfaces so that the locking plate will not block the movement of the L-shaped thrust plate when it moves. Several placement plates, telescopic plates, L-shaped thrust plates, locking plates and telescopic springs are provided to fix the water inlet pipe to the water inlet pipe. Two sets of the first fixing ring and the second fixing ring are provided so that the drain inlet pipe can be connected to the drain pipe.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model, through the coordinated operation of components such as a first sealing ring, a telescopic plate, an L-shaped thrust plate, a locking plate, a locking port, and a telescopic spring within the sealing device, achieves the following: when the L-shaped thrust plate is pulled to the left to a certain extent, the return spring, due to its elasticity, can reset the locking plate. When the locking plate resets, the user releases the handle, and the telescopic spring, due to its extension force, causes the L-shaped thrust plate to move to the right. When the L-shaped thrust plate moves to the right, it inserts into the locking port on the locking plate, fixing the water inlet pipe to the water inlet pipe, thus improving the sealing effect between the two and achieving a better overall sealing performance of the valve body. At the same time, it facilitates the disassembly of the water inlet pipe and allows for the replacement of the first sealing ring.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional overall structural cross-sectional view of the sealing device of this utility model;

[0021] Figure 3 This is a three-dimensional overall structural cross-sectional view of the water inlet pipe of this utility model;

[0022] Figure 4 For the present utility model Figure 2 A three-dimensional magnified structural diagram of A.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Valve body; 2. Valve cover; 3. Inlet pipe; 4. Drain pipe; 5. Sealing device; 51. Inlet pipe; 52. First placement ring; 53. First placement groove; 54. First sealing ring; 55. Drain pipe; 56. Second placement ring; 57. Second placement groove; 58. Second sealing ring; 59. Placement plate; 510. Telescopic plate; 511. L-shaped thrust plate; 512. Handle; 513. Locking plate; 514. Locking port; 515. Reset plate; 516. Reset spring; 517. Telescopic spring; 518. First fixing ring; 519. Threaded rod; 520. Locking nut; 521. Second fixing ring; 522. Insertion hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model is a water seal check valve sealing structure, including a valve body 1, a valve cover 2 fixedly connected to the top of the valve body 1, an inlet pipe 3 fixedly connected to the side of the valve body 1, a drain pipe 4 fixedly connected to the side of the valve body 1, and a sealing device 5 provided on the circumferential surface of the inlet pipe 3.

[0027] The sealing device 5 includes a water inlet pipe 51, the inner wall of which is disposed on the circumferential surface of the water inlet pipe 3. A first placement ring 52 is fixedly connected to the inner wall of the water inlet pipe 51. A first placement groove 53 is provided on the inner wall of the first placement ring 52. A first sealing ring 54 is fixedly connected to the inner wall of the first placement groove 53.

[0028] A drain inlet pipe 55 is provided on the circumferential surface of the drain pipe 4. A second placement ring 56 is fixedly connected to the inner wall of the drain inlet pipe 55. A second placement groove 57 is formed on the inner wall of the second placement ring 56. A second sealing ring 58 is fixedly connected to the inner wall of the second placement groove 57. The second placement groove 57 is for placing the second sealing ring 58. The second sealing ring 58 is to form a seal between the drain pipe 4 and the drain inlet pipe 55, so as to improve the overall sealing effect of the valve body 1.

[0029] A placement plate 59 is fixedly connected to the circumference of the water inlet pipe 3. A telescopic plate 510 is fixedly connected to the side of the placement plate 59. An L-shaped thrust plate 511 is fixedly connected to the telescopic tube of the telescopic plate 510. A handle 512 is fixedly connected to the side of the L-shaped thrust plate 511. The placement plate 59 is for placing the telescopic plate 510. The L-shaped thrust plate 511 is for pushing the locking plate 513. At the same time, the water inlet pipe 51 is fixedly connected to the water inlet pipe 3. The handle 512 is for pulling the telescopic plate 510 so that the telescopic plate 510 can extend and retract.

[0030] A locking plate 513 passes through the circumferential surface of the water inlet pipe 51. The side of the locking plate 513 is slidably connected to the circumferential surface of the water inlet pipe 51. A locking port 514 is opened on the side of the locking plate 513. A reset plate 515 is fixedly connected to the side of the locking plate 513. A reset spring 516 is fixedly connected to the side of the reset plate 515. One end of the reset spring 516 is fixedly connected to the circumferential surface of the water inlet pipe 51. The locking plate 513 and the locking port 514 are for inserting the L-shaped thrust plate 511 into the locking port 514 to lock the L-shaped thrust plate 511. The reset spring 516 is for resetting the locking plate 513.

[0031] A telescopic spring 517 is fixedly connected to the side of the placement plate 59. One end of the telescopic spring 517 is fixedly connected to the side of the L-shaped push plate 511. The telescopic spring 517 is used to allow the L-shaped push plate 511 to enter the locking port 514 by utilizing the telescopic force of the telescopic spring 517.

[0032] A first fixing ring 518 is fixedly connected to the circumferential surface of the water inlet pipe 51. A threaded rod 519 is fixedly connected to the side of the first fixing ring 518. A locking nut 520 is threaded onto the circumferential surface of the threaded rod 519. A second fixing ring 521 is fixedly connected to the circumferential surface of the water inlet pipe 3. An insertion hole 522 is provided on the side of the second fixing ring 521. The threaded rod 519 and the locking nut 520 are used to fix the first fixing ring 518 and the second fixing ring 521 together. The insertion hole 522 is used to insert the threaded rod 519.

[0033] The L-shaped thrust plate 511 is L-shaped with its side surface sloping. The locking plate 513 is rectangular with its side surface sloping. The sloping surface of the locking plate 513 is located on the displacement trajectory of the sloping surface of the L-shaped thrust plate 511. Several placement plates 59, telescopic plates 510, L-shaped thrust plates 511, locking plates 513, and telescopic springs 517 are arranged in a circular array along the side circumference of the water inlet pipe 51. Two sets of placement plates 59, telescopic plates 510, L-shaped thrust plates 511, locking plates 513, and telescopic springs 517 are arranged symmetrically along the vertical central axis of the valve body 1. The threaded rod 519, locking nut 520, and insertion hole 5... Several rings 22 are arranged in a circular array along the side of the first fixing ring 518. Two sets of the first fixing ring 518 and the second fixing ring 521 are arranged and symmetrical to each other along the vertical central axis of the valve body 1. The side shapes of the L-shaped thrust plate 511 and the locking plate 513 are both set as inclined surfaces so that the locking plate 513 will not block the movement of the L-shaped thrust plate 511 when it moves. Several sets of the placement plate 59, telescopic plate 510, L-shaped thrust plate 511, locking plate 513 and telescopic spring 517 are arranged so that the water inlet pipe 51 is fixedly connected to the water inlet pipe 3. Two sets of the first fixing ring 518 and the second fixing ring 521 are arranged so that the drain inlet pipe 55 can be connected to the drain pipe 4.

[0034] A specific application of this embodiment is as follows: When the valve body 1 is in use, the user inserts the water inlet pipe 51 into the water inlet pipe 3. The user pulls out the telescopic plate 510 on the placement plate 59 by holding the handle 512. Pulling the telescopic plate 510 to the left will cause the L-shaped push plate 511 to move to the left. When the L-shaped push plate 511 moves to the left, the inclined surface on the L-shaped push plate 511 will push the inclined surface on the locking plate 513, causing the locking plate 513 to slide backward. When the L-shaped push plate 511 is pulled to the left to a certain extent, the return spring 516 can reset the locking plate 513 due to its elasticity. When the locking plate 513 resets, the user releases the handle 512. When the user releases the handle 512, the telescopic spring 517 will cause the L-shaped push plate 511 to move to the right due to its extension force. When the thrust plate 511 moves to the right, it inserts into the locking port 514 on the locking plate 513, fixing the water inlet pipe 51 to the water inlet pipe 3. The installation method of the drain inlet pipe 55 is the same as that of the water inlet pipe 51. When the water inlet pipe 51 is inserted into the water inlet pipe 3, the first fixing ring 518 on the water inlet pipe 51 has a threaded rod 519, which is inserted into the insertion hole 522 on the second fixing ring 521. The user can fix the water inlet pipe 51 to the water inlet pipe 3 again by tightening the locking nut 520, which makes the water inlet pipe 51 more secure and improves the sealing effect between the two. At the same time, the first sealing ring 54 is provided in the water inlet pipe 51, which can make the sealing between the water inlet pipe 3 and the water inlet pipe 51 better, and make the overall sealing of the valve body 1 better.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A water-sealed check valve sealing structure, comprising a valve body (1), characterized in that: A valve cover (2) is fixedly connected to the top of the valve body (1), an inlet pipe (3) is fixedly connected to the side of the valve body (1), a drain pipe (4) is fixedly connected to the side of the valve body (1), and a sealing device (5) is provided on the circumferential surface of the inlet pipe (3). The sealing device (5) includes a water inlet pipe (51), the inner wall of which is disposed on the circumferential surface of the water inlet pipe (3), and a first placement ring (52) is fixedly connected to the inner wall of the water inlet pipe (51). A first placement groove (53) is opened on the inner wall of the first placement ring (52), and a first sealing ring (54) is fixedly connected to the inner wall of the first placement groove (53).

2. The sealing structure of the water-sealed check valve according to claim 1, characterized in that, A drain inlet pipe (55) is provided on the circumferential surface of the drain pipe (4). A second placement ring (56) is fixedly connected to the inner wall of the drain inlet pipe (55). A second placement groove (57) is opened on the inner wall of the second placement ring (56). A second sealing ring (58) is fixedly connected to the inner wall of the second placement groove (57).

3. The sealing structure of the water-sealed check valve according to claim 1, characterized in that, A placement plate (59) is fixedly connected to the circumferential surface of the water inlet pipe (3). A telescopic plate (510) is fixedly connected to the side of the placement plate (59). An L-shaped thrust plate (511) is fixedly connected to the telescopic tube of the telescopic plate (510). A handle (512) is fixedly connected to the side of the L-shaped thrust plate (511).

4. The sealing structure of the water-sealed check valve according to claim 3, characterized in that, A locking plate (513) is passed through the circumferential surface of the water inlet pipe (51). The side of the locking plate (513) is slidably connected to the circumferential surface of the water inlet pipe (51). A locking port (514) is opened on the side of the locking plate (513). A reset plate (515) is fixedly connected to the side of the locking plate (513). A reset spring (516) is fixedly connected to the side of the reset plate (515). One end of the reset spring (516) is fixedly connected to the circumferential surface of the water inlet pipe (51).

5. The sealing structure of the water-sealed check valve according to claim 3, characterized in that, A telescopic spring (517) is fixedly connected to the side of the placement plate (59), and one end of the telescopic spring (517) is fixedly connected to the side of the L-shaped thrust plate (511).

6. The sealing structure of the water-sealed check valve according to claim 4, characterized in that, A first fixing ring (518) is fixedly connected to the circumferential surface of the water inlet pipe (51), a threaded rod (519) is fixedly connected to the side of the first fixing ring (518), a locking nut (520) is threadedly connected to the circumferential surface of the threaded rod (519), a second fixing ring (521) is fixedly connected to the circumferential surface of the water inlet pipe (3), and an insertion hole (522) is opened on the side of the second fixing ring (521).

7. The sealing structure of the water-sealed check valve according to claim 6, characterized in that, The L-shaped thrust plate (511) is L-shaped, and the side surface of the L-shaped thrust plate (511) is inclined. The locking plate (513) is rectangular, and the side surface of the locking plate (513) is inclined. The inclined surface of the locking plate (513) is located on the displacement trajectory of the inclined surface of the L-shaped thrust plate (511). Several of the placement plate (59), telescopic plate (510), L-shaped thrust plate (511), locking plate (513) and telescopic spring (517) are provided, and they are arranged along the water inlet pipe (51). The side circumferential array, the placement plate (59), telescopic plate (510), L-shaped thrust plate (511), locking plate (513) and telescopic spring (517) are arranged in two sets and are symmetrical to each other along the vertical central axis of the valve body (1). The threaded rod (519), locking nut (520) and insertion hole (522) are arranged in several sets and are arranged along the side circumferential array of the first fixing ring (518). The first fixing ring (518) and the second fixing ring (521) are arranged in two sets and are symmetrical to each other along the vertical central axis of the valve body (1).

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