Check valve

Abstract

The utility model discloses a check valve, which comprises a valve body provided with an inner cavity; the valve cover is arranged to cover the valve body mounting opening; the valve clack is arranged in the inner cavity and forms one-way blocking of the medium; the rocker is connected to the valve clack; the fork-shaped piece is arranged to be hinged to the rocker; the mounting hole is formed in the valve body, is communicated with the outside and the inner cavity and is used for mounting a fork-shaped piece; the sealing structure is used for sealing the mounting hole; the positioning assembly is arranged to be used for fixing the fork-shaped piece in the mounting hole; when the fork-shaped piece is installed in the installation hole, one part of the fork-shaped piece is located in the inner cavity, and the valve clack rotates to form one-way blocking of a medium. The utility model has the following advantages and effects: the utility model is simple to process, so that the production qualification rate and the production quality of products are improved.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a check valve. Background Art

[0002] A check valve is a valve with a circular disc as the opening and closing part. It blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The disc movement mode is divided into lifting type and swing type.

[0003] The existing check valve includes a valve body with an inner cavity, a valve cover installed on the valve body, a valve flap located in the inner cavity, a fork-shaped piece integrally arranged with the valve body and located in the inner cavity, and a rocker hinged to the fork-shaped piece and connected to the valve flap. The existing valve body and the fork-shaped piece are integrally cast and processed, but because the fork-shaped piece is arranged to be located in the inner cavity of the valve body, and the fork-shaped piece needs to be processed into a structure for the rocker to be hinged and is limited by the compact inner cavity space, this results in the processing position of the fork-shaped piece being more tricky and the processing and forming being more difficult, which greatly increases the probability of defective products. Based on the above problems, the present invention was conceived. Utility Model Content

[0004] The utility model aims to provide a check valve, which is easy to process, thereby improving the production qualification rate and production quality of the product.

[0005] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a check valve, comprising: a valve body, configured to have an inner cavity; a valve cover, configured to cover the mounting port of the valve body; a valve disc, arranged in the inner cavity and constituting a one-way blockage of the medium; a rocker, configured to be connected to the valve disc; a fork, configured to be hinged to the rocker; a mounting hole, arranged in the valve body and connecting the outside with the inner cavity and for the installation of the fork; a sealing structure, configured to seal the mounting hole; a positioning assembly, configured to fix the fork to the mounting hole; when the fork is installed in the mounting hole, a part of the fork is located in the inner cavity and the rotation of the valve disc can constitute a one-way blockage of the medium.

[0006] By adopting the above technical scheme, a valve body with a mounting hole is cast and processed, and then the fork-shaped piece is installed into the mounting hole. The sealing installation of the fork-shaped piece on the valve body is realized by cooperating with the sealing structure through the provided positioning component, so that the valve body structure with the fork-shaped piece can be conveniently constructed; since the mounting hole has a simple structure and the mounting hole is communicated with the outside world, the molding operation space of the mounting hole is larger and the processing is more convenient, thereby improving the production qualification rate and production quality of the product.

[0007] It is further configured that: the positioning assembly includes a stepped groove formed in the mounting hole, a positioning protrusion fixedly arranged on the fork-shaped piece, and a positioning plate arranged on the outer wall of the valve body, and the stepped groove, positioning protrusion and positioning plate cooperate to limit the movement of the fork-shaped piece along the length direction of the mounting hole.

[0008] By adopting the above technical solution, the positioning protrusion is installed into the mounting hole together with the fork-shaped piece, and then the positioning plate is installed outside the valve body. The cooperation of the step groove, the positioning protrusion and the positioning plate is used to limit the movement of the fork-shaped piece along the length direction of the mounting hole, so as to achieve the fixation of the fork-shaped piece in the mounting hole. This method is easy to process, simple in structure and low in production cost.

[0009] It is further configured as follows: the sealing structure is a sealing ring for sealing the mounting hole.

[0010] By adopting the above technical solution, the setting of the sealing ring prevents leakage from occurring at this position, thereby ensuring the sealing performance of the valve.

[0011] It is further configured as follows: the positioning protrusions are distributed around the outer circumference of the fork-shaped member to form a ring, the sealing ring is arranged between the stepped groove and the positioning protrusions, and the positioning plate drives the fork-shaped member to make the positioning protrusions squeeze the sealing ring.

[0012] By adopting the above technical solution, the positioning plate drives the fork-shaped piece to make the positioning protrusion press against the sealing ring, thereby ensuring the sealing force of the sealing ring and compensating for the assembly gap formed during assembly, so that the setting of the sealing ring can achieve a better sealing effect.

[0013] It is further configured as follows: the valve body and the valve cover are fixedly connected by a fastener, the fastener has a fastening force applied along the length direction of the mounting hole, and the positioning plate is fixedly arranged on the fastener to move the positioning plate toward one side of the mounting hole.

[0014] By adopting the above technical solution, the fastener simultaneously drives the positioning plate to move toward the side of the mounting hole during the process of fastening the valve cover, so that the fastener can fix the valve cover while also fixing the positioning plate and squeezing the sealing ring, making disassembly and assembly more convenient, reducing production costs, and realizing multi-purpose operation of a structure.

[0015] It is further configured as follows: the fastener is a clamp, the positioning plate is fixedly arranged on the clamp body, and a reinforcing rib connected to the clamp body is provided on the side of the positioning plate opposite to the mounting hole.

[0016] By adopting the above technical solution, the reinforcement ribs are provided to improve the structural strength of the connection between the positioning plate and the clamp, so that the structure can better bear the force on the positioning plate and improve the service life of the structure.

[0017] It is further configured that: a buffer belt in a C-shape is provided at a position where the rocker rotates to contact the inner cavity wall, and a locking piece is connected between the buffer belt and the rocker.

[0018] By adopting the above technical solution, the C-shaped buffer belt structure combines the two characteristics of shape and material, so that the structure has a better buffering effect, and cooperates with the locking structure to ensure the service life of the fixed structure, and can better adapt to harsh working conditions.

[0019] In summary, the utility model has the following beneficial effects: the utility model is easy to process, thereby improving the production qualification rate and production quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment;

[0021] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0022] Figure 3 for Figure 1 Enlarged view of part B in the middle.

[0023] In the figure: 1. valve body; 2. inner cavity; 3. valve cover; 4. valve disc; 5. rocker; 6. fork-shaped piece; 7. mounting hole; 8. positioning assembly; 81. stepped groove; 82. positioning protrusion; 83. positioning plate; 9. sealing ring; 10. fastener; 11. reinforcing rib; 12. buffer strip; 13. locking piece. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] refer to Figures 1 to 3 A check valve comprises: a valve body 1, which is provided with an inner cavity 2; a valve cover 3, which is arranged to cover the mounting opening of the valve body 1; a valve disc 4, which is arranged in the inner cavity 2 and constitutes a one-way blockage of the medium; a rocker 5, which is arranged to be fixedly connected to the valve disc 4; a fork-shaped member 6, which is arranged to be hinged with the rocker 5; a mounting hole 7, which is provided in the valve body 1 and connects the outside with the inner cavity 2 and is provided for the installation of the fork-shaped member 6; a sealing structure, which is arranged to be used for sealing the mounting hole 7; a positioning assembly 8, which is arranged to be used for fixing the fork-shaped member 6 to the mounting hole 7; when the fork-shaped member 6 is installed in the mounting hole 7, a part of the fork-shaped member 6 is located in the inner cavity 2 and the valve disc 4 can rotate to constitute a one-way blockage of the medium.

[0026] The positioning assembly 8 includes a stepped groove 81 formed in the mounting hole 7, a positioning protrusion 82 integrally provided on the fork-shaped member 6, and a positioning plate 83 provided on the outer wall of the valve body 1. The stepped groove 81, the positioning protrusion 82 and the positioning plate 83 cooperate to limit the movement of the fork-shaped member 6 along the length direction of the mounting hole 7. The sealing structure is a sealing ring 9 for sealing the mounting hole 7.

[0027] The positioning protrusions 82 are distributed around the outer circumference of the fork-shaped member 6 to form a ring. The sealing ring 9 is disposed between the stepped groove 81 and the positioning protrusions 82 , and the positioning plate 83 drives the fork-shaped member 6 to make the positioning protrusions 82 squeeze the sealing ring 9 .

[0028] The valve body 1 and the valve cover 3 are fixedly connected by a fastener 10, and the fastener 10 has a fastening force applied along the length direction of the mounting hole 7. The positioning plate 83 is fixedly arranged on the fastener 10 so as to move the positioning plate 83 toward the side of the mounting hole 7. The fastener 10 is a clamp, and the positioning plate 83 is fixedly arranged on the clamp body of the clamp. The side of the positioning plate 83 facing away from the mounting hole 7 is provided with a reinforcing rib 11 fixedly connected to the clamp body.

[0029] A C-shaped buffer belt 12 is provided at the position where the rocker 5 rotates to contact the wall of the inner cavity 2, and a locking member 13 is connected between the buffer belt 12 and the rocker 5. The buffer belt 12 is a rubber belt, and the locking member 13 is a steel wire that ties and fixes the buffer belt 12 and the rocker 5.

[0030] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A check valve, characterized in that: include: A valve body (1) is configured to have an inner cavity (2); a valve cover (3) is configured to cover a mounting opening of the valve body (1); a valve flap (4) is configured to be disposed in the inner cavity (2) and to form a one-way blockage of a medium; a rocker (5) is configured to be connected to the valve flap (4); a fork-shaped member (6) is configured to be hinged to the rocker (5); a mounting hole (7) is disposed in the valve body (1) and connects the outside with the inner cavity (2) and is provided for the fork-shaped member (6) to be mounted; a sealing structure is configured to be used for sealing the mounting hole (7); a positioning assembly (8) is configured to be used for fixing the fork-shaped member (6) to the mounting hole (7); when the fork-shaped member (6) is mounted in the mounting hole (7), a portion of the fork-shaped member (6) is located in the inner cavity (2) and the valve flap (4) can rotate to form a one-way blockage of the medium.

2. The check valve according to claim 1, characterized in that: The positioning assembly (8) comprises a stepped groove (81) formed in the mounting hole (7), a positioning protrusion (82) fixedly arranged on the fork-shaped member (6), and a positioning plate (83) arranged on the outer wall of the valve body (1); the stepped groove (81), the positioning protrusion (82) and the positioning plate (83) cooperate to limit the movement of the fork-shaped member (6) along the length direction of the mounting hole (7).

3. The check valve according to claim 2, characterized in that: The sealing structure is a sealing ring (9) used for sealing the mounting hole (7).

4. The check valve according to claim 3, characterized in that: The positioning protrusion (82) is distributed around the outer circumference of the fork-shaped member (6) to form a ring shape, the sealing ring (9) is arranged between the stepped groove (81) and the positioning protrusion (82), and the positioning plate (83) drives the fork-shaped member (6) to make the positioning protrusion (82) squeeze the sealing ring (9).

5. The check valve according to claim 2, characterized in that: The valve body (1) and the valve cover (3) are fixedly connected via a fastener (10); the fastener (10) has a fastening force applied along the length direction of the mounting hole (7); and the positioning plate (83) is fixedly arranged on the fastener (10) to enable the positioning plate (83) to move toward one side of the mounting hole (7).

6. The check valve according to claim 5, characterized in that: The fastener (10) is a clamp, the positioning plate (83) is fixedly arranged on the clamp body, and the positioning plate (83) is provided with a reinforcing rib (11) connected to the clamp body on the side opposite to the mounting hole (7).

7. The check valve according to claim 1, characterized in that: A C-shaped buffer belt (12) is provided at the position where the rocker (5) rotates to contact the wall of the inner cavity (2), and a locking piece (13) is connected between the buffer belt (12) and the rocker (5).

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