Leak-proof air conditioner check valve

Abstract

The utility model discloses a leakproof air conditioner check valve, relates to air conditioner check valve technical field, including valve body, valve pipe and positioning fastening subassembly, valve body left and right sides are connected with valve pipe, and one side of valve pipe is fixed with connecting flange, the front and rear sides of valve pipe outside are both equipped with the positioning fastening subassembly, and the valve body left and right sides are connected with the valve pipe. And the positioning and fastening assembly comprises a fixing plate, a side plate, a connecting spring, a clamping frame, a threaded cylinder and a threaded rod, the fixing plate is fixedly connected with the valve pipe, the side plate is fixed to one side of the fixing plate, and the clamping frame is connected to the side, close to the connecting flange, of the side plate through the connecting spring. According to the leakproof air conditioner check valve, by rotating the threaded rod in the threaded cylinder, the position of the clamping frame at one end of the threaded rod can be conveniently moved, so that the clamping frame can be clamped on the outer side of the connecting flange and the outer side of the butt joint flange after butt joint, then the situation that a gap is generated due to looseness of the connecting position of the connecting flange and the butt joint flange can be prevented, and a certain leakproof effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner check valve technology, specifically an air conditioner check valve designed to prevent leakage. Background Technology

[0002] An air conditioning check valve is a type of valve used in air conditioning systems. A check valve is a valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent the backflow of the medium. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, backflow valve, or isolation valve.

[0003] For example, the utility model application with application number CN202321639000.7 discloses a wear-resistant and corrosion-resistant air conditioning check valve. Similar to the air conditioning check valve in the above application, there are still the following shortcomings: During the use of the air conditioning check valve, after long-term use, the connection between the check valve pipe and the external pipe may become loose due to water flow impact, resulting in gaps and water leakage.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed a leak-proof air conditioning check valve. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof air conditioning check valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof air conditioning check valve, comprising a valve body, a valve pipe, and a positioning and fastening assembly. The valve body is connected to valve pipes on both its left and right sides, and a connecting flange is fixed to one side of the valve pipe. Positioning and fastening assemblies are installed on both the front and rear sides of the valve pipe. Each positioning and fastening assembly includes a fixing plate, a side plate, a connecting spring, a retaining frame, a threaded cylinder, and a threaded rod. The fixing plate is fixedly connected to the valve pipe, and a side plate is fixed to one side of the fixing plate. A retaining frame is connected to the side plate near the connecting flange via a connecting spring, and two connecting springs are symmetrically arranged, one above the other. A threaded cylinder is embedded in the middle of the side plate, and a threaded rod is screwed into the inside of the threaded cylinder. One end of the threaded rod is rotatably connected to the retaining frame.

[0007] Furthermore, a mating flange is installed on one side of the connecting flange, and an external connecting pipe is fixed on one side of the mating flange.

[0008] Furthermore, both the connecting flange and the mating flange have lip-shaped sealing rings embedded on their inner sides, and the connecting flange and the mating flange have the same thickness.

[0009] Furthermore, a sealing and leak-proof assembly is installed on the inner side of the valve pipe and the outer pipe, and the sealing and leak-proof assembly includes a fixed inner pipe and an annular sealing ring. The inner wall of the valve pipe near the outer pipe is fixed with a fixed inner pipe, and an annular sealing ring is fixed on one side of the fixed inner pipe.

[0010] Furthermore, the sealing and leak-proof assembly also includes a snap-fit ​​inner tube, and the snap-fit ​​inner tube is fixed to the inner wall of the outer tube near the valve tube, and the snap-fit ​​inner tube is located between the fixed inner tube and the annular sealing ring.

[0011] Furthermore, the card frame has an arc-shaped structure, and the inner cavity thickness of the card frame is equal to the thickness of the connecting flange plus the thickness of the mating flange.

[0012] This utility model provides a leak-proof air conditioning check valve, which has the following beneficial effects:

[0013] This utility model is equipped with a positioning and fastening assembly. Two symmetrically arranged connecting springs are used to connect the clamping frame. Since one end of the threaded rod is rotatably connected to the clamping frame, the position of the clamping frame at one end of the threaded rod can be easily moved by rotating the threaded rod inside the threaded cylinder. This allows the clamping frame to be locked onto the outside of the connecting flange and the mating flange after docking, making the connection between the two secure and not easy to loosen. This can prevent the connection between the connecting flange and the mating flange from loosening and causing gaps, thus playing a certain role in preventing leakage.

[0014] This utility model is equipped with a sealing and leak-proof component. The valve pipe and the outer pipe are connected by a connecting flange and a docking flange. The lip seal ring can enhance the sealing performance of the flange connection. The snap-fit ​​inner pipe of the outer pipe can be snapped between the fixed inner pipe of the valve pipe and the annular seal ring, thereby extending the leakage path. Together with the annular seal ring near the connection of the connecting flange and the docking flange, it can play a sufficient role in sealing and preventing leakage. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a leak-proof air conditioning check valve according to the present invention.

[0016] Figure 2 This is a schematic diagram of the external pipe connection structure of an air conditioning check valve for preventing leakage according to this utility model;

[0017] Figure 3 This is a half-sectional structural diagram of the connection between the valve pipe and the external pipe of an air conditioning check valve that is leak-proof according to this utility model.

[0018] In the diagram: 1. Valve body; 2. Valve pipe; 3. Connecting flange; 4. Butt flange; 5. Lip seal; 6. Outer pipe; 7. Sealing and leak-proof assembly; 701. Fixed inner pipe; 702. Annular seal; 703. Snap-fit ​​inner pipe; 8. Positioning and fastening assembly; 801. Fixing plate; 802. Side plate; 803. Connecting spring; 804. Clip frame; 805. Threaded cylinder; 806. Threaded rod. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] like Figures 1-3 As shown, a leak-proof air conditioning check valve includes a valve body 1, a valve pipe 2, and a positioning and fastening assembly 8. Valve pipes 2 are connected to both the left and right sides of the valve body 1. A connecting flange 3 is fixed to one side of the valve pipe 2, and a mating flange 4 is installed on one side of the connecting flange 3. An outer pipe 6 is fixed to one side of the mating flange 4. A lip seal 5 is embedded inside both the connecting flange 3 and the mating flange 4, and the connecting flange 3 and the mating flange 4 have equal thicknesses. A sealing and leak-proof assembly 7 is installed inside the valve pipe 2 and the outer pipe 6. The sealing and leak-proof assembly 7 includes a fixed inner pipe 701 and an annular seal 702. The fixed inner pipe 701 is fixed to the inner wall of the valve pipe 2 near the outer pipe 6. A ring-shaped sealing ring 702 is fixed on one side. The sealing and leak-proof assembly 7 also includes a snap-fit ​​inner tube 703. The snap-fit ​​inner tube 703 is fixed on the inner wall of the outer tube 6 near the valve tube 2, and the snap-fit ​​inner tube 703 is located between the fixed inner tube 701 and the ring-shaped sealing ring 702. The valve tube 2 and the outer tube 6 are connected by a connecting flange 3 and a mating flange 4. The lip seal 5 can enhance the sealing performance of the flange connection. The snap-fit ​​inner tube 703 of the outer tube 6 can be snapped between the fixed inner tube 701 and the ring-shaped sealing ring 702 of the valve tube 2, thereby extending the leakage path. Together with the ring-shaped sealing ring 702 near the connection of the connecting flange 3 and the mating flange 4, it can play a sufficient role in sealing and preventing leakage.

[0021] Positioning and fastening assemblies 8 are installed on both the front and rear sides of the valve pipe 2. Each positioning and fastening assembly 8 includes a fixing plate 801, a side plate 802, a connecting spring 803, a retaining frame 804, a threaded cylinder 805, and a threaded rod 806. The fixing plate 801 is fixedly connected to the valve pipe 2, and a side plate 802 is fixed to one side of the fixing plate 801. A retaining frame 804 is connected to the side plate 802 near the connecting flange 3 via a connecting spring 803. Two connecting springs 803 are symmetrically arranged, one above the other. A threaded cylinder 805 is embedded in the middle of the side plate 802, and a threaded rod 806 is screwed into the inside of the threaded cylinder 805. One end of the threaded rod 806 is rotatably connected to the retaining frame 804. The retaining frame 804 has an arc-shaped structure. The inner cavity thickness is equal to the thickness of the connecting flange 3 plus the thickness of the mating flange 4; two symmetrically arranged connecting springs 803 are used to connect the clamping frame 804. Since one end of the threaded rod 806 is rotatably connected to the clamping frame 804, by rotating the threaded rod 806 inside the threaded cylinder 805, the position of the clamping frame 804 at one end of the threaded rod 806 can be easily moved, so that the clamping frame 804 can be clamped on the outside of the connecting flange 3 and the mating flange 4 after docking, so that the connection between the two is tight and not easy to loosen, thereby preventing the connection between the connecting flange 3 and the mating flange 4 from loosening and causing gaps, thus playing a certain role in preventing leakage. The thread grooves of the two flanges are concave structures, so that the locking bolts will not protrude and affect the use of the clamping frame 804.

[0022] In summary, as Figures 1-3 As shown, when using this leak-proof air conditioning check valve, firstly, the connecting flange 4 of the external pipe 6 for the air conditioner can be connected to the connecting flange 3 of the valve pipe 2 on one side of the valve body 1 of the air conditioning check valve. The lip seal 5 enhances the sealing of the flange connection. During the connection process, the snap-fit ​​inner tube 703 of the external pipe 6 can be snapped between the fixed inner tube 701 and the annular seal 702 of the valve pipe 2, thereby extending the leakage path. This, together with the annular seal 702 near the connection of the connecting flange 3 and the connecting flange 4, can play a sufficient role in sealing and preventing leakage. During use, the position of the retaining frame 804 at one end of the threaded rod 806 can be moved by rotating the threaded rod 806 inside the threaded cylinder 805. This allows the retaining frame 804 to be snapped onto the outside of the connected flange 3 and the connecting flange 4 after docking, thereby preventing the connection of the connected flange 3 and the connecting flange 4 from loosening and creating gaps. Therefore, it can play a certain role in preventing leakage. This completes the use process of the leak-proof air conditioning check valve.

[0023] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A leak-proof air conditioning check valve, comprising a valve body (1), a valve pipe (2), and a positioning and fastening assembly (8), characterized in that, The valve body (1) is connected to valve pipes (2) on both the left and right sides, and a connecting flange (3) is fixed on one side of the valve pipe (2). Positioning and fastening assemblies (8) are installed on both the front and rear sides of the valve pipe (2). Each positioning and fastening assembly (8) includes a fixing plate (801), a side plate (802), a connecting spring (803), a retaining frame (804), a threaded cylinder (805), and a threaded rod (806). The fixing plate (801) is fixedly connected to the valve pipe (2), and the fixed flange (3) is fixedly connected to the valve pipe (2). A side plate (802) is fixed on one side of the fixed plate (801). The side plate (802) near the connecting flange (3) is connected to a frame (804) by a connecting spring (803). There are two connecting springs (803) symmetrically arranged, one above the other. A threaded cylinder (805) is embedded in the middle of the side plate (802). A threaded rod (806) is screwed into the inside of the threaded cylinder (805). One end of the threaded rod (806) is rotatably connected to the frame (804).

2. The anti-leakage air conditioning check valve according to claim 1, characterized in that, A mating flange (4) is installed on one side of the connecting flange (3), and an external pipe (6) is fixed on one side of the mating flange (4).

3. The leak-proof air conditioning check valve according to claim 1, characterized in that, The inner sides of the connecting flange (3) and the mating flange (4) are both inlaid with lip-shaped sealing rings (5), and the thicknesses of the connecting flange (3) and the mating flange (4) are equal.

4. The leak-proof air conditioning check valve according to claim 2, characterized in that, A sealing and leak-proof assembly (7) is installed on the inner side of the valve pipe (2) and the outer pipe (6). The sealing and leak-proof assembly (7) includes a fixed inner pipe (701) and an annular sealing ring (702). The inner wall of the valve pipe (2) near the outer pipe (6) is fixed with a fixed inner pipe (701), and an annular sealing ring (702) is fixed on one side of the fixed inner pipe (701).

5. A leak-proof air conditioning check valve according to claim 4, characterized in that, The sealing and leak-proof assembly (7) also includes a snap-fit ​​inner tube (703). The snap-fit ​​inner tube (703) is fixed on the inner wall of the outer tube (6) near the valve tube (2), and the snap-fit ​​inner tube (703) is located between the fixed inner tube (701) and the annular sealing ring (702).

6. A leak-proof air conditioning check valve according to claim 2, characterized in that, The card frame (804) has an arc-shaped structure, and the inner cavity thickness of the card frame (804) is equal to the thickness of the connecting flange (3) plus the thickness of the mating flange (4).

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