Anti-backflow structure of drain pipe

Abstract

The utility model relates to the technical field of drainage, in particular to an anti-backflow structure of a drainage pipe. According to the technical scheme, a rotating shaft is installed in a valve body, a connecting rod is installed in the valve body through the rotating shaft, a connecting block is installed at the end, away from the rotating shaft, of the connecting rod, a valve plate is installed in the connecting block and located at a water inlet, and first flange plates are arranged at a liquid outlet and the water inlet of the valve body; a first flange plate is arranged at the top end of the valve body, a limiting module is installed at the top end of the valve body through the first flange plate, a threaded hole is formed in the limiting module, a threaded rod is rotatably installed on the limiting module through the threaded hole, a hand wheel is installed at the top end of the threaded rod, and a top block is installed at the bottom end of the threaded rod. The problem that an existing device cannot accurately limit the opening angle of the valve plate is solved, the stability and reliability of a system are improved, and the requirement for accurate control over fluid flow under different working conditions is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to drainage technical field, concretely relates to a drainage pipe anti backflow structure. BACKGROUND

[0002] Drainage pipe anti backflow structure is a device designed to prevent water from flowing back into the drainage system or a specific area. This structure has applications in various fields, including but not limited to urban drainage systems, industrial drainage systems, and automotive air conditioning drainage systems.

[0003] After searching, the patent with patent announcement number CN200820200096.6 discloses a check valve rocker and check valve. Although the device reduces the impact on the valve body when in use, it cannot limit the opening angle of the valve plate. This may lead to inaccurate control of the opening degree of the valve plate in actual application. In some scenarios where precise control of fluid flow or pressure is required, this limitation may result in poor fluid control and even affect the stable operation of the entire system. SUMMARY

[0004] To address the deficiencies of the prior art, the present utility model provides a drainage pipe anti backflow structure that solves the problems raised in the background art.

[0005] The solution to the above technical problem is as follows:

[0006] A drainage pipe anti backflow structure includes a valve body with a liquid outlet and a water inlet. A rotating shaft is installed inside the valve body. A connecting rod is installed inside the valve body through the rotating shaft. A connecting block is installed at the end of the connecting rod away from the rotating shaft. A valve plate is installed inside the connecting block. The valve plate is located at the water inlet.

[0007] The liquid outlet and the water inlet of the valve body are provided with first flange plates, and the top end of the valve body is also provided with a first flange plate, the top end of the valve body is installed with a limiting module through the first flange plate, a threaded hole is formed in the limiting module, a threaded rod is rotatably installed in the threaded hole through the limiting module, a hand wheel is installed at the top end of the threaded rod, and a top block is installed at the bottom end of the threaded rod.

[0008] Based on the above technical scheme, the utility model further can make improvement as follows.

[0009] Further, the limiting module is provided with a second flange plate, and the limiting module and the first flange plate of the top end of the valve body are fixed by screw locking through the second flange plate.

[0010] The beneficial effects of the above further scheme are:

[0011] Flange connection is a common and key way of connecting pipes and equipment, which has stable structure and can withstand large pressure and torque. By screw locking, the close fit between flanges can be ensured, and leakage caused by loosening or deformation can be prevented. Flange connection usually uses gaskets to enhance sealing, and gaskets can fill the small gap between flanges to prevent fluid leakage. The fastening force of the bolt can ensure that the gasket is under enough pressure, thereby achieving good sealing effect.

[0012] Further, the valve plate is adapted in size to the water inlet.

[0013] The beneficial effects of the above further scheme are:

[0014] When the size of the valve plate is completely adapted to the water inlet, the valve plate can be tightly fitted at the water inlet to form an effective seal. This close fit can prevent fluid from leaking between the valve plate and the water inlet, ensuring the normal operation of the drainage system. The adapted valve plate can ensure that the fluid passing through the water inlet is not hindered too much. This can reduce the pressure loss and energy loss of the fluid at the valve, improving the efficiency of the drainage system.

[0015] Further, the threaded rod is driven to rotate by the hand wheel, and the threaded rod and the threaded hole cooperate to drive the top block to rise and fall in the valve body.

[0016] The beneficial effects of the above further scheme are:

[0017] By rotating the hand wheel, the rotation angle and lifting height of the threaded rod can be accurately controlled. This precise control enables the top block to move to the desired position accurately, thereby achieving precise adjustment of the opening angle of the valve plate. The design of the threaded rod and threaded hole makes the entire structure more compact and occupies less space. This helps to install more components or equipment in limited space, improving the utilization of space.

[0018] Further, the top block is located directly above the valve plate, and the opening angle of the valve plate is limited by the top block.

[0019] The beneficial effects of the above further scheme are:

[0020] By adjusting the height or position of the top block, the opening angle of the valve plate can be accurately controlled. This precise control helps to meet the fluid flow requirements in different working conditions, ensuring the stability and reliability of the system. The top block, as a component that limits the opening angle of the valve plate, can effectively prevent the valve plate from being damaged or causing unnecessary fluid leakage due to excessive opening. This helps to prolong the service life of the valve plate and reduce the frequency of maintenance and replacement. When the valve plate needs to be completely closed, the top block can ensure the close fit between the valve plate and the valve seat, thereby improving the sealing performance. This helps to prevent fluid leakage between the valve plate and the valve seat in the closed state, ensuring the normal operation of the system.

[0021] The utility model provides a kind of drain pipe anti-backflow structure. With the following beneficial effects:

[0022] The scheme connects limiting module and valve body by flange plate, so that the whole structure is compact and easy to install. Flange connection not only ensures the stability of the structure, but also facilitates subsequent maintenance and replacement. In addition, the cooperation design of threaded rod and threaded hole makes the lifting adjustment of top block simple and fast, without the need for complex operation tools.

[0023] The scheme realizes flexible adjustment of the opening angle of the valve plate through the design of the threaded rod and the top block. Users can adjust the height of the threaded rod by rotating the hand wheel according to actual needs, thereby changing the degree of restriction of the top block on the valve plate. This design improves the safety of drainage, ensuring the normal operation of the drainage system. By accurately controlling the opening angle of the valve plate, the scheme can optimize the flow distribution of the drainage system and improve the drainage efficiency. At the same time, since unnecessary flow waste is avoided, the scheme can also save energy to a certain extent and reduce operating costs.

[0024] Since the scheme can accurately control the opening angle of the valve plate, it can effectively prevent the instability of the drainage system caused by excessive or insufficient water flow. Especially in extreme weather conditions such as heavy rain, flood, etc., this structure can ensure that the drainage system maintains stable drainage capacity and prevents damage caused by backflow of water flow. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0026] In the drawings:

[0027] Figure 1 is a front appearance schematic view of the present application;

[0028] Figure 2 is a front appearance schematic view of the present application;

[0029] Figure 3 is a rear appearance schematic view of the present application;

[0030] Figure 4 is a bottom appearance schematic view of the present application.

[0031] In the drawings, the components represented by each reference numeral are listed as follows:

[0032] 1, limiting module; 101, hand wheel; 102, threaded rod; 103, second flange plate; 104, threaded hole; 105, top block; 2, valve body; 201, first flange plate; 202, liquid outlet; 203, connecting block; 204, water inlet; 205, valve plate; 206, connecting rod; 207, rotating shaft. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0034] Please refer to Figures 1 to 4 The embodiments provided by the present application:

[0035] Embodiment one

[0036] The drain pipe anti-backflow structure includes a valve body 2, which is provided with a liquid outlet 202 and a water inlet 204. A rotating shaft 207 is installed in the valve body 2. A connecting rod 206 is installed in the valve body 2 through the rotating shaft 207. A connecting block 203 is installed at the end of the connecting rod 206 away from the rotating shaft 207. A valve plate 205 is installed in the connecting block 203. The size of the valve plate 205 is adapted to the water inlet 204. When the size of the valve plate 205 completely matches the water inlet 204, the valve plate 205 can tightly adhere to the water inlet 204, forming a reliable sealing structure. This tight adhesion can effectively prevent fluid leakage between the valve plate 205 and the water inlet 204, ensuring the stable operation of the drainage system. The adapted valve plate 205 design can ensure that the fluid resistance through the water inlet 204 is minimized, thereby reducing the pressure loss and energy loss of the fluid at the valve, improving the overall efficiency of the drainage system, and the valve plate 205 is located at the water inlet 204.

[0037] Example two

[0038] In order to facilitate the opening angle of the valve plate 205, for example, as Figures 1 to 4As shown, the application also includes: the valve body 2 outlet 202 and inlet 204 is equipped with the first flange plate 201, and the top end of the valve body 2 is also equipped with the first flange plate 201, the top end of the valve body 2 is installed with the limiting module 1 through the first flange plate 201, the limiting module 1 is equipped with the second flange plate 103, the limiting module 1 is locked and fixed through the mutual cooperation of the second flange plate 103 and the first flange plate 201 of the top end of the valve body 2 through the bolt, the flange plate connection is a common and crucial way for pipeline and equipment connection, with excellent structural stability, can withstand higher pressure and torque. Through the locking effect of the bolt, it can ensure the close fit between the flange plate interface, effectively prevent the leakage problem caused by loosening or deformation. In addition, the flange plate connection is usually equipped with a gasket to enhance its sealing performance, the gasket can fill the small gap between the flange plate interface, thereby preventing fluid leakage. The pre-tightening force of the bolt ensures that the gasket is fully compressed, thereby achieving excellent sealing effect, the limiting module 1 is provided with a threaded hole 104, the limiting module 1 is rotatably installed with a threaded rod 102 through the threaded hole 104, the top end of the threaded rod 102 is installed with a hand wheel 101, the threaded rod 102 is driven to rotate through the hand wheel 101, and the threaded rod 102 and the threaded hole 104 are cooperated to drive the top block 105 to ascend and descend in the valve body 2, by rotating the hand wheel 101, the rotation angle and lifting height of the threaded rod 102 can be accurately controlled. This precise control mechanism enables the top block 105 to accurately move to the desired position, thereby achieving precise adjustment of the opening angle of the valve plate 205. The design of the threaded rod 102 and the threaded hole 104 makes the whole structure more compact, occupies less space, helps to install more components or equipment in limited space, improves space utilization, the bottom end of the threaded rod 102 is installed with the top block 105, the top block 105 is located directly above the valve plate 205, and the opening angle of the valve plate 205 is limited by the top block 105, by adjusting the height or position of the top block 105, the opening angle of the valve plate 205 can be accurately controlled. This precise control mechanism helps to meet the demand for fluid flow under different working conditions, ensuring the stability and reliability of the system. As a key component for limiting the opening angle of the valve plate 205, the top block 105 can effectively prevent the valve plate 205 from being damaged or causing unnecessary fluid leakage due to excessive opening, thereby prolonging the service life of the valve plate 205 and reducing the frequency of maintenance and replacement. When the valve plate 205 needs to be completely closed, the top block 105 can ensure the close fit between the valve plate 205 and the valve seat, thereby improving the sealing performance and preventing fluid leakage between the valve plate 205 and the valve seat in the closed state, ensuring the normal operation of the system.

[0039] Working principle:

[0040] The valve body 2 is provided with a liquid outlet 202 and a water inlet 204, which is the basic channel for drainage. A valve plate 205 is installed at the water inlet 204 and is matched with the size of the water inlet 204, which is used to control the flow of water.

[0041] When the water flow flows from the water inlet 204, the valve plate 205 will be pushed away by the water flow, allowing the water to pass and flow to the liquid outlet 202. When the water flow stops or reverses (i.e. backflow), the valve plate 205 will return to its original position and tightly fit the water inlet 204 due to its own weight or the change of water flow pressure, thereby preventing the water from backflowing from the liquid outlet 202 to the water inlet 204.

[0042] The limiting module 1 is connected with the top end of the valve body 2 through the first flange plate 201 and the second flange plate 103, and is fixed by bolt locking to ensure the stability and sealing of the structure. The limiting module 1 is provided with a threaded hole 104 and a threaded rod 102, and the threaded rod 102 can be rotated in the threaded hole 104 by rotating the hand wheel 101, thereby realizing the lifting of the threaded rod 102.

[0043] The bottom end of the threaded rod 102 is provided with a top block 105, which is located directly above the valve plate 205. By adjusting the height of the threaded rod 102, the gap between the top block 105 and the valve plate 205 can be changed, thereby limiting the maximum opening angle of the valve plate 205. When a larger drainage capacity is required, the top block 105 can be raised to allow the valve plate 205 to open more freely; when backflow of water needs to be prevented, the top block 105 can be lowered to limit the opening angle of the valve plate 205 and increase its sealing performance.

[0044] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0045] In addition, it should be understood that although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A drain pipe backflow prevention structure, comprising a valve body (2), the valve body (2) is provided with a liquid outlet (202) and a water inlet (204), a rotating shaft (207) is installed in the valve body (2), a connecting rod (206) is installed in the valve body (2) through the rotating shaft (207), a connecting block (203) is installed at one end of the connecting rod (206) away from the rotating shaft (207), a valve plate (205) is installed in the connecting block (203), and the valve plate (205) is located at the water inlet (204), characterized in that: first flanges (201) are arranged at the liquid outlet (202) and the water inlet (204) of the valve body (2), and the top end of the valve body (2) is also provided with a first flange (201), a limiting module (1) is installed at the top end of the valve body (2) through the first flange (201), a threaded hole (104) is formed in the limiting module (1), a threaded rod (102) is rotatably installed in the limiting module (1) through the threaded hole (104), a hand wheel (101) is installed at the top end of the threaded rod (102), and a top block (105) is installed at the bottom end of the threaded rod (102).

2. The backflow prevention structure for a drain pipe according to claim 1, characterized by: The limiting module (1) is provided with a second flange (103), and the limiting module (1) and the first flange (201) of the top end of the valve body (2) are mutually matched and fixed by bolts through the second flange (103).

3. The backflow prevention structure for a drain pipe according to claim 1, characterized by: The valve plate (205) is matched in size with the water inlet (204).

4. The backflow prevention structure for a drain pipe according to claim 1, characterized by: The threaded rod (102) is driven to rotate by the hand wheel (101), and the threaded rod (102) and the threaded hole (104) are matched to drive the top block (105) to ascend and descend in the valve body (2).

5. The backflow prevention structure for a drain pipe according to claim 1, characterized by: The top block (105) is located directly above the valve plate (205), and the opening angle of the valve plate (205) is limited by the top block (105).

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