Metal cast butterfly valve convenient to assemble

Abstract

The utility model discloses a metal cast butterfly valve convenient to assemble relates to butterfly valve field, including two same pipeline, the top intercommunication of pipeline has the air inlet pipe, the top intercommunication of air inlet pipe has the filter box, and the inside installation of filter box has a plurality of filter screen, and the top of filter box is connected with the sealing ring, and the top of sealing ring is equipped with the exhaust pipe, and the inner wall fixed of exhaust pipe has the baffle ring, and the top inboard of baffle ring is pasted with piston post, and the top of piston post is equipped with spring, and the top fixed of spring has the fixed cap, and the inboard of pipeline is equipped with the mounting mechanism. In the utility model, through gas enters the air inlet pipe, and is filtered through the filter screen in the filter box, and the filtered gas will enter the exhaust pipe, at this moment, the gas will push the piston post upwards, so that the piston post moves upwards along the limiting rod at the bottom of the fixed cap, realizes the automatic balance of the air pressure of butterfly valve two sides pipeline, makes it always keep air pressure balance.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valves, specifically a metal cast butterfly valve that is easy to assemble. Background Technology

[0002] Metal cast butterfly valves are widely used in pipeline systems in water supply and drainage, petrochemical, and metallurgical industries due to their advantages such as compact structure, corrosion resistance, and long service life. They are used to control the flow and control the on / off state of fluids.

[0003] As pipeline systems become more complex, the stability of the air pressure balance between the pipes on both sides of the butterfly valve becomes increasingly critical, directly affecting the valve's opening flexibility, sealing performance, and the operational safety of the pipeline system.

[0004] Existing metal-cast butterfly valves, designed for easy assembly, often focus on optimizing the assembly structure to improve installation convenience, neglecting the design of a pressure balancing function. In actual use, fluctuations in gas flow and changes in medium pressure within the pipeline can easily lead to pressure imbalance on both sides of the butterfly valve. This pressure imbalance exerts additional pressure on the valve plate, increasing valve opening resistance and potentially causing valve plate deformation and seal wear, affecting normal valve operation. In severe cases, it can even trigger pipeline vibration, leaks, and other safety hazards. Utility Model Content

[0005] This utility model provides a metal cast butterfly valve that is easy to assemble, and solves the problem that the gas flow fluctuations and medium pressure changes in the pipeline of the existing metal cast butterfly valve can easily lead to pressure imbalance on both sides of the butterfly valve, resulting in valve plate deformation and wear of the seals.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An easy-to-assemble cast metal butterfly valve includes two identical pipes. The top of the pipes is connected to an air inlet pipe, and the top of the air inlet pipe is connected to a filter box. Multiple filter screens are installed inside the filter box. A sealing ring is connected to the top of the filter box, and an exhaust pipe is provided on the top of the sealing ring. A retaining ring is fixed to the inner wall of the exhaust pipe, and a piston rod is attached to the inner side of the top of the retaining ring. A spring is provided on the top of the piston rod, and a fixing cap is fixed on the top of the spring. An installation mechanism is provided on the inner side of the pipe for installing the butterfly valve.

[0007] As a preferred technical solution of this utility model, the installation mechanism includes a sealing ring, which is disposed on one side of the pipe. The inner wall of the sealing ring is slidably connected to the outer wall of the T-shaped connecting pipe. The outer wall of the T-shaped connecting pipe is provided with multiple anti-foolproof slots for limiting installation. Multiple connecting plates are installed on the outer wall of the T-shaped connecting pipe. A bolt is fixed on one side of the connecting plate. The outer wall of the bolt is slidably connected to a connecting plate. The inner sides of the multiple connecting plates are connected to the outer side of the pipe. A nut is threadedly connected to the outer wall of the bolt.

[0008] As a preferred technical solution of this utility model, the lower end of the outer wall of the exhaust pipe is provided with an external thread, and the external thread is threadedly connected to the sealing ring.

[0009] As a preferred technical solution of this utility model, the outer wall of the exhaust pipe is provided with an exhaust port, which is used to discharge gas.

[0010] As a preferred technical solution of this utility model, a valve core is fixed between two adjacent T-shaped connecting pipes, and a valve is installed on the top of the valve core.

[0011] The present invention has the following advantages: 1. Gas enters the intake pipe and is filtered through the filter screen inside the filter box. The filtered gas then enters the exhaust pipe, pushing the piston upwards. This causes the piston to move upwards along the limit rod at the bottom of the fixed cap. At this time, the spring is compressed, creating a gap between the piston and the retaining ring. The gas then exits through the exhaust port on the side of the exhaust pipe, thus automatically balancing the gas pressure on both sides of the butterfly valve and keeping it in balance.

[0012] 2. Align the anti-foolproof slot with the groove on the inside of the pipe and insert it. At this time, the T-shaped connecting pipe will be installed on the pipe, and the sealing ring will play a sealing role. Then, the second connecting plate will be installed on the bolt. Next, install the bolt on the outer wall of the bolt. At this time, the second connecting plate will be fixed together with the first connecting plate, which realizes the quick installation of the butterfly valve. It also has an anti-foolproof device to prevent the butterfly valve from being installed incorrectly. Attached Figure Description

[0013] Figure 1 This is a perspective view of a metal cast butterfly valve that is easy to assemble.

[0014] Figure 2 This is a structurally disassembled diagram of the piping in a metal cast butterfly valve that is easy to assemble.

[0015] Figure 3 This is a structurally exploded view of the filter box in a metal cast butterfly valve that is easy to assemble.

[0016] Figure 4 This is a structurally exploded view of the exhaust pipe in a metal cast butterfly valve that is easy to assemble.

[0017] In the diagram: 1. Pipe; 2. Installation mechanism; 201. Sealing ring; 202. T-shaped connecting pipe; 203. Anti-fooling slot; 204. Connecting plate one; 205. Bolt; 206. Connecting plate two; 3. Inlet pipe; 4. Filter box; 5. Filter screen; 6. Sealing ring; 7. Retaining ring; 8. Piston column; 9. Spring; 10. Fixing cap; 11. External thread; 12. Exhaust pipe; 13. Exhaust port; 14. Valve; 15. Valve core. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Please see Figure 1 , Figure 3 and Figure 4 A metal-cast butterfly valve designed for easy assembly comprises two identical pipes 1, the tops of which are connected to an inlet pipe 3, which in turn connects to a filter box 4. Inside the filter box 4, multiple filter screens 5 are installed to filter the incoming gas. A sealing ring 6 is connected to the top of the filter box 4 to ensure the overall airtightness of the structure. An exhaust pipe 12 is located on the top of the sealing ring 6, and a retaining ring 7 is fixed to the inner wall of the exhaust pipe 12. A piston rod 8 is tightly fitted to the inner side of the top of the retaining ring 7. A spring 9 with excellent elasticity is located on the top of the piston rod 8, and its top is fixed to a fixing cap 10. Additionally, an installation mechanism 2 is located inside the pipes 1; the main function of this installation mechanism 2 is to perform the installation operation of the butterfly valve.

[0021] In one instance of this embodiment, please refer to Figure 1 and Figure 2 The installation mechanism 2 includes a sealing ring 201, which is positioned on one side of the pipe 1. Its inner wall is slidably connected to the outer wall of the T-shaped connecting pipe 202. Multiple foolproof slots 203 are provided on the outer wall of the T-shaped connecting pipe 202. These slots are designed to limit the installation and prevent errors during installation. Furthermore, multiple connecting plates 204 are installed on the outer wall of the T-shaped connecting pipe 202, with a bolt 205 fixed to one side of each plate. The outer walls of these bolts 205 are slidably connected to the connecting plates 206, and the inner sides of the connecting plates 206 are connected to the outer side of the pipe 1. A nut is also threaded onto the outer wall of the bolts 205, ensuring the stability and reliability of the entire installation mechanism 2.

[0022] In one instance of this embodiment, please refer to Figure 1 and Figure 4 The lower end of the outer wall of the exhaust pipe 12 is provided with an external thread 11, which can be threadedly connected to the sealing ring 6 to ensure a tight fit between the two and prevent gas leakage. In addition, an exhaust port 13 is also provided on the outer wall of the exhaust pipe 12. The main function of the exhaust port 13 is to discharge the internal gas to ensure normal operation and pressure balance of the equipment. The exhaust pipe 12 can not only be firmly connected to the sealing ring 6 through the external thread 11, but also efficiently complete the task of gas discharge with the help of the exhaust port 13, thereby improving overall work efficiency and safety.

[0023] In one instance of this embodiment, please refer to Figure 1 and Figure 2 A valve core 15 is fixedly installed between two adjacent T-shaped connecting pipes 202. The valve core 15 is precisely installed to ensure its proper function. A valve 14 is installed on top of the valve core 15. This valve 14, through its tight fit with the valve core 15, can effectively control the flow state of the fluid, thereby achieving precise regulation of the entire system operation and providing higher reliability and convenience for actual operation.

[0024] In the implementation of this utility model, the valve core 15 can be opened by rotating the valve 14, and it can be used normally at this time. When the air pressure in the pipe is too high, the gas will enter the air inlet pipe 3 and be filtered through the filter screen 5 inside the filter box 4. The filtered gas will enter the exhaust pipe 12. At this time, the gas will push the piston column 8 upward, so that the piston column 8 moves upward along the limiting rod at the bottom of the fixed cap 10. At this time, the spring 9 will be compressed, and a gap will be created between the piston column 8 and the retaining ring 7. At this time, the gas will be discharged through the exhaust port 13 on the side of the exhaust pipe 12. When the air pressure in the pipe stabilizes, the piston column 8 will spring back under the action of the spring 9. At this time, the piston column 8 and the retaining ring 7 will be closed, so that the gas cannot escape. This realizes the automatic balance of the air pressure in the pipes 1 on both sides of the butterfly valve, so that it always maintains the air pressure balance.

[0025] When assembling the butterfly valve, align the foolproof slot 203 with the groove on the inside of pipe 1 and insert it. At this time, the T-shaped connecting pipe 202 will be installed on pipe 1, and the sealing ring 201 will play a sealing role. Then, the connecting plate 206 will be installed on the bolt 205. Next, install the nut on the outer wall of the bolt 205. At this time, the connecting plate 206 will be fixed together with the connecting plate 204, which realizes the quick installation of the butterfly valve. At the same time, a foolproof device is provided to prevent the butterfly valve from being installed incorrectly.

[0026] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A metal cast butterfly valve that is easy to assemble, comprising two identical pipes (1), characterized in that, The top of the pipe (1) is connected to the air inlet pipe (3), the top of the air inlet pipe (3) is connected to the filter box (4), the filter box (4) is equipped with multiple filter screens (5), the top of the filter box (4) is connected to the sealing ring (6), the top of the sealing ring (6) is provided with the exhaust pipe (12), the inner wall of the exhaust pipe (12) is fixed with the retaining ring (7), the inner side of the top of the retaining ring (7) is attached to the piston column (8), the top of the piston column (8) is provided with the spring (9), the top of the spring (9) is fixed with the fixing cap (10), the inner side of the pipe (1) is provided with the installation mechanism (2), the installation mechanism (2) is used to install the butterfly valve.

2. The easily assembled cast metal butterfly valve according to claim 1, characterized in that, The installation mechanism (2) includes a sealing ring (201), which is located on one side of the pipe (1). The inner wall of the sealing ring (201) is slidably connected to the outer wall of the T-shaped connecting pipe (202). The outer wall of the T-shaped connecting pipe (202) is provided with multiple anti-foolproof slots (203) for limiting installation. Multiple connecting plates (204) are installed on the outer wall of the T-shaped connecting pipe (202). A bolt (205) is fixed on one side of the connecting plate (204). A connecting plate (206) is slidably connected to the outer wall of the bolt (205). The inner side of the multiple connecting plates (206) is connected to the outer side of the pipe (1). A nut is threaded on the outer wall of the bolt (205).

3. The easily assembled cast metal butterfly valve according to claim 1, characterized in that, The lower end of the outer wall of the exhaust pipe (12) is provided with an external thread (11), which is threadedly connected to the sealing ring (6).

4. The easily assembled cast metal butterfly valve according to claim 1, characterized in that, The outer wall of the exhaust pipe (12) is provided with an exhaust port (13), which is used to discharge gas.

5. A metal cast butterfly valve for easy assembly according to claim 2, characterized in that, A valve core (15) is fixed between two adjacent T-shaped connecting pipes (202), and a valve (14) is installed on the top of the valve core (15).

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