High-flow check valve

Abstract

The utility model discloses a large-flow check valve which comprises a main body unit and a valve body, a through hole is formed in the top of the valve body, and the inner wall of the through hole is rotationally connected with a connecting shaft; the control unit comprises an opening and closing rotating rod, the opening and closing rotating rod is detachably connected to the upper portion of the valve body, the opening and closing rotating rod is connected with the connecting shaft, a valve plate is arranged below the opening and closing rotating rod, the valve plate is connected with the connecting shaft and driven by the opening and closing rotating rod, and a mounting blind hole is formed in the inner wall of the opening and closing rotating rod; a zigzag-shaped mounting groove is formed in the bottom of the inner wall of the mounting blind hole, the outer wall of the connecting shaft is fixedly connected with a connecting block, and the connecting block is movably connected with the zigzag-shaped mounting groove. The valve plate can be disassembled and fixed by taking out or inserting the opening and closing rotating rod, the valve plate can be quickly disassembled and replaced conveniently after the valve plate is abraded, and therefore the situation that the sealing effect is reduced due to the fact that the valve plate is abraded is prevented, and workers can disassemble and assemble the valve plate conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a large flow check valve. Background Art

[0002] A check valve is a valve whose opening and closing parts are round discs and which rely on their own weight and medium pressure to block the backflow of the medium. It is an automatic valve. The check valve is installed in the pipeline to prevent the backflow of the medium to ensure the normal operation of control and production. Among them, the butterfly valve has a higher conveying efficiency and can therefore increase the conveying flow rate.

[0003] The existing butterfly valve plate is usually installed in the valve body through a rotating shaft. When corrosive fluid is transported in the pipeline for a long time, the valve plate is easily damaged, and a certain amount of wear will occur when the valve plate rotates, resulting in a reduction in the sealing effect of the valve plate. Therefore, it is inconvenient to disassemble and replace the valve plate. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problems existing in the existing large flow check valve, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a large-flow check valve, which is designed to solve the problem that "the existing butterfly valve plate is usually installed in the valve body through a rotating shaft. When the corrosive fluid is transported in the pipeline for a long time, the valve plate is easily damaged, and a certain amount of wear will occur when the valve plate rotates, resulting in a reduction in the sealing effect of the valve plate, making it inconvenient to disassemble and replace the valve plate."

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a large flow check valve, comprising:

[0008] The main unit comprises a valve body, a through hole is formed on the top of the valve body, and a connecting shaft is rotatably connected to the inner wall of the through hole;

[0009] The control unit includes an opening and closing rotating rod, which is detachably connected to the top of the valve body and connected to the connecting shaft. A valve plate is arranged below the opening and closing rotating rod, and the valve plate is connected to the connecting shaft and driven by the opening and closing rotating rod.

[0010] As a preferred solution of a large-flow check valve described in the utility model, the inner wall of the opening and closing rotating rod is provided with a mounting blind hole, the bottom of the inner wall of the mounting blind hole is provided with a folded mounting groove, the outer wall of the connecting shaft is fixedly connected with a connecting block, and the connecting block is movably connected to the folded mounting groove.

[0011] As a preferred solution of the large flow check valve described in the utility model, a sealing ring is installed on the outer wall of the connecting shaft, and the sealing ring prevents the fluid in the valve body from being squeezed upward.

[0012] As a preferred solution of a large-flow check valve described in the utility model, the connecting shaft is a hollow structure, a plug rod is arranged inside the connecting shaft, a limiting block is fixedly connected to the bottom of the outer wall of the plug rod, and a connecting hole matching the plug rod and the limit block is opened on the top of the valve plate.

[0013] As a preferred solution of a large-flow check valve described in the utility model, wherein: the outer wall of the insert rod is fixedly connected to two limit plates, the upper limit plate is fixedly connected to the inner wall of the connecting shaft, the lower limit plate is movably connected to the inner wall of the connecting shaft, and the opposite surfaces of the two limit plates are fixedly connected with springs.

[0014] As a preferred solution of the large flow check valve described in the utility model, wherein: the top of the plug rod is fixedly connected with a push block with a diameter larger than the inner ring of the connecting shaft, and the push block is pushed downward through the top of the inner wall of the installation blind hole.

[0015] Beneficial effects of the utility model:

[0016] When in use, the opening and closing rotating rod is rotated to the vertical part of the folded installation groove and then pulled upward to disengage the installation blind hole from the push block. The spring rebound drives the limit plate and the plug rod below to move upward and retract into the interior of the connecting shaft, so that the plug rod and the limit block are disengaged from the connecting hole on the top of the valve plate. The valve plate can then be taken out for replacement, and the new valve plate is placed in the middle position inside the valve body. The opening and closing rotating rod is reinserted. After the connecting block is inserted into the end of the vertical part of the folded installation groove, as the opening and closing rotating rod rotates, the horizontal part of the folded installation groove clamps the connecting block, and the installation blind hole is The inner wall of the valve plate pushes the push block to move downward, and the push block drives the insertion rod to move downward and inserts the limit block into the connecting hole on the top of the valve plate, thereby completing the installation of the valve plate. The limiting effect of the folded installation groove allows the opening and closing rotating rod to drive the connecting shaft and the valve plate to rotate together and complete the flow interruption and blocking effect on the fluid. After the valve plate is worn, it is convenient to quickly disassemble and replace the valve plate, thereby preventing the valve plate from being worn and causing the sealing effect to be reduced. The valve plate can be disassembled and fixed by taking out or plugging in the opening and closing rotating rod, which is convenient for the staff to disassemble and install the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 This is a schematic diagram of the overall structure of a large flow check valve proposed by the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the internal structure of the valve body;

[0020] Figure 3 for Figure 2 Schematic diagram of the opening and closing rotating rod structure;

[0021] Figure 4 for Figure 2 Schematic diagram of the internal structure of the connecting shaft.

[0022] In the figure: 100, main unit; 101, valve body; 102, connecting shaft; 102a, connecting block; 102b, sealing ring; 102c, plug rod; 102d, limit block; 102e, spring; 102f, limit plate; 102g, push block; 200, control unit; 201, opening and closing rotating rod; 201a, mounting blind hole; 201b, folded mounting groove; 202, valve plate. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0027] Reference Figure 1-4 The utility model provides a large flow check valve, comprising:

[0028] The main unit 100 includes a valve body 101, a through hole is formed on the top of the valve body 101, and a connecting shaft 102 is rotatably connected to the inner wall of the through hole;

[0029] The control unit 200 includes an opening and closing rotating rod 201, which is detachably connected to the top of the valve body 101 and connected to the connecting shaft 102. A valve plate 202 is arranged below the opening and closing rotating rod 201, and the valve plate 202 is connected to the connecting shaft 102 and driven by the opening and closing rotating rod 201.

[0030] Among them, the inner wall of the opening and closing rotating rod 201 is provided with an installation blind hole 201a, and the bottom of the inner wall of the installation blind hole 201a is provided with a folded installation groove 201b, and the outer wall of the connecting shaft 102 is fixedly connected with a connecting block 102a, and the connecting block 102a is movably connected to the folded installation groove 201b. After the connecting block 102a is inserted into the end of the vertical part of the folded installation groove 201b, as the opening and closing rotating rod 201 rotates, the horizontal part of the folded installation groove 201b clamps the connecting block 102a, and when the opening and closing rotating rod 201 rotates, the connecting shaft 102 and the valve plate 202 are driven to rotate together through the limiting effect of the folded installation groove 201b.

[0031] Furthermore, a sealing ring 102 b is installed on the outer wall of the connecting shaft 102 , and the sealing ring 102 b prevents the fluid in the valve body 101 from being squeezed upward, thereby improving the sealing performance of the valve body 101 .

[0032] Furthermore, the connecting shaft 102 is a hollow structure, and an insert rod 102c is arranged inside the connecting shaft 102. The bottom of the outer wall of the insert rod 102c is fixedly connected to the limit block 102d. The top of the valve plate 202 is provided with a connecting hole that matches the insert rod 102c and the limit block 102d. The insert rod 102c is inserted into the connecting hole on the top of the valve plate 202. The limiting effect of the limit block 102d enables the insert rod 102c, the connecting shaft 102 and the valve plate 202 to rotate together.

[0033] Furthermore, two limit plates 102f are fixedly connected to the outer wall of the insertion rod 102c, the upper limit plate 102f is fixedly connected to the inner wall of the connecting shaft 102, and the lower limit plate 102f is movably connected to the inner wall of the connecting shaft 102, and the opposite surfaces of the two limit plates 102f are fixedly connected with a spring 102e, and the spring 102e is a tension spring. The spring 102e drives the insertion rod 102c to rebound through the lower limit plate 102f, thereby disconnecting the connection between the insertion rod 102c and the valve plate 202.

[0034] Furthermore, the top of the plug rod 102c is fixedly connected with a push block 102g having a diameter larger than the inner ring of the connecting shaft 102. The push block 102g is pushed downward through the top of the inner wall of the mounting blind hole 201a, thereby connecting the plug rod 102c to the valve plate 202.

[0035] During use, the opening and closing rotating rod 201 is rotated to the vertical part of the folded installation groove 201b and then pulled upward, so that the installation blind hole 201a is disengaged from the push block 102g, and the spring 102e rebounds to drive the lower limit plate 102f and the insertion rod 102c to move upward and retract into the interior of the connecting shaft 102, so that the insertion rod 102c and the limit block 102d are disengaged from the connecting hole at the top of the valve plate 202, and then the valve plate 202 can be taken out for replacement, and the new valve plate 202 is placed in the valve body 101. After the connecting block 102a is inserted into the end of the vertical part of the folded installation groove 201b, as the opening and closing rotating rod 201 rotates, the horizontal part of the folded installation groove 201b clamps the connecting block 102a, and the inner wall of the installation blind hole 201a pushes the push block 102g to move downward, and the push block 102g drives the insertion rod 102c to move downward and inserts the limit block 102d into the connecting hole at the top of the valve plate 202, thereby completing the installation of the valve plate 202.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A large flow check valve, characterized in that: include: The main unit (100) comprises a valve body (101), a through hole is formed at the top of the valve body (101), and a connecting shaft (102) is rotatably connected to the inner wall of the through hole; The control unit (200) comprises an opening and closing rotating rod (201), wherein the opening and closing rotating rod (201) is detachably connected to the top of the valve body (101), the opening and closing rotating rod (201) is connected to the connecting shaft (102), a valve plate (202) is arranged below the opening and closing rotating rod (201), and the valve plate (202) is connected to the connecting shaft (102) and driven by the opening and closing rotating rod (201).

2. A large flow check valve according to claim 1, characterized in that: The inner wall of the opening and closing rotating rod (201) is provided with a mounting blind hole (201a), the inner wall bottom of the mounting blind hole (201a) is provided with a folding mounting groove (201b), the outer wall of the connecting shaft (102) is fixedly connected with a connecting block (102a), and the connecting block (102a) is movably connected to the folding mounting groove (201b).

3. A large flow check valve according to claim 2, characterized in that: A sealing ring (102b) is installed on the outer wall of the connecting shaft (102), and the sealing ring (102b) prevents the fluid in the valve body (101) from being squeezed upward.

4. A large flow check valve according to claim 3, characterized in that: The connecting shaft (102) is a hollow structure, an insert rod (102c) is arranged inside the connecting shaft (102), a limit block (102d) is fixedly connected to the bottom of the outer wall of the insert rod (102c), and a connecting hole that matches the insert rod (102c) and the limit block (102d) is opened on the top of the valve plate (202).

5. A large flow check valve according to claim 4, characterized in that: Two limit plates (102f) are fixedly connected to the outer wall of the insertion rod (102c); the upper limit plate (102f) is fixedly connected to the inner wall of the connecting shaft (102); the lower limit plate (102f) is movably connected to the inner wall of the connecting shaft (102); and springs (102e) are fixedly connected to the opposite surfaces of the two limit plates (102f).

6. A large flow check valve according to claim 5, characterized in that: The top of the insertion rod (102c) is fixedly connected with a push block (102g) having a diameter larger than the inner ring of the connecting shaft (102), and the push block (102g) is pushed downward through the top of the inner wall of the installation blind hole (201a).

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