Air valve low pressure leakage compensation device

Abstract

The utility model provides an air valve prevents low pressure leak compensation device, include: valve body, the valve body upper surface fixed connection valve cover, and the dust screen and buffer cover are fixedly connected respectively on the valve cover upper surface, the buffer cover upper surface is fixedly connected through bolt and covers, and the dust screen upper surface is fixedly connected and covers, and the valve body inner chamber upper end fixed connection guide cover, the guide cover is swingly connected in the float ball, and the valve cover lower surface is fixedly connected with the valve flap through the sealing element in the position of valve body inner chamber, and the valve flap middle part fixed connection sealing sleeve, fixedly connect the buffer board in buffer cover, and the buffer board middle part fixed connection guide cylinder, and the buffer rod upper end slidingly connects in the guide cylinder. The utility model discloses through the cooperation of guide cover, valve flap, float ball, abutting piece, guide cylinder, buffer rod, elastic element and sealing sleeve, makes the compensation mechanism in the air valve interior can possess multiple sealing structure, to enhance the effect that this air valve prevents low pressure leak.

Description

Technical Field

[0001] This utility model relates to the field of air valve technology, specifically to an air valve anti-low-pressure leakage compensation device. Background Technology

[0002] An air valve is a special valve used to prevent negative pressure from being generated in a pipe due to pressure reduction waves during transient processes. It is typically installed at points where the dynamic water pressure is low during normal pipeline operation, and where liquid column separation may occur during transient flow. It draws in air when the pressure in the pipeline is lower than atmospheric pressure and discharges air when the pressure rises above atmospheric pressure. During the venting process, the valve automatically closes when the pipe is full of liquid, preventing liquid from leaking into the atmosphere. However, over prolonged use, the sealing structure of the air valve is prone to aging and wear. Consequently, during the gas discharge process when the pipe is filled with water, the fluid in the pipeline can easily be discharged along with the air, leading to leakage problems in the air valve under low-pressure conditions, thus affecting the normal operation of both the air valve and the pipeline. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, an air valve low-pressure leakage compensation device is provided to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, an air valve low-pressure leakage compensation device is provided, comprising: a valve body, a valve cover fixedly connected to the upper surface of the valve body, a dustproof net and a buffer cover fixedly connected to the upper surface of the valve cover respectively, a top cover fixedly connected to the upper surface of the buffer cover by bolts, and a top cover fixedly connected to the upper surface of the dustproof net, and a guide cover fixedly connected to the upper end of the valve body cavity, a float ball movably connected inside the guide cover, and a valve disc fixedly connected to the lower surface of the valve cover relative to the valve body cavity by a sealing element, a sealing sleeve fixedly connected to the middle of the valve disc, a buffer plate fixedly connected inside the buffer cover, a guide cylinder fixedly connected to the middle of the buffer plate, and a buffer rod slidably connected to the upper end of the buffer rod inside the guide cylinder, the lower end of the buffer rod passing through the sealing sleeve and fixedly connected to an abutment block, and a fixing plate fixedly connected to the upper surface of the guide cylinder, and an elastic element fixedly connected between the lower surface of the fixing plate and the upper surface of the buffer rod.

[0005] Preferably, the guide cover has an overall cylindrical structure, the lower surface of the guide cover has a spherical protrusion, and multiple sets of through holes are uniformly and symmetrically opened on the lower surface of the guide cover. Meanwhile, multiple sets of through grooves are opened at equal intervals around the center of the side of the guide cover, and all sets of through grooves have a square structure.

[0006] Preferably, the buffer plate fixedly connected inside the buffer cover has a rectangular structure, and the guide cylinder fixedly connected in the middle of the buffer plate has a cylindrical structure, with a threaded structure at the upper end of the outer arc surface of the guide cylinder.

[0007] Preferably, the sealing sleeve fixedly connected to the lower surface of the guide cylinder has a cylindrical structure, and the axial section of the sealing sleeve has an I-shaped structure, while the inner cavity size of the sealing sleeve is adapted to the outer side size of the buffer rod.

[0008] Preferably, the buffer rod has a cylindrical structure, the size of the outer side of the buffer rod is adapted to the size of the inner cavity of the guide cylinder, and the upper end of the guide rod is fixedly connected to the lower end of the elastic element, the upper end of the elastic element is fixedly connected to the fixing plate, and the fixing plate is screwed to the upper end of the guide cylinder through the thread structure opened in the inner cavity, and a through hole is opened in the middle of the fixing plate relative to the position of the inner cavity of the buffer rod.

[0009] Preferably, the abutment block fixedly connected to the lower surface of the buffer rod has a square structure, the lower surface of the abutment block has an arc-shaped structure that fits the upper surface of the float, and a guide groove is opened in the middle of the lower surface of the abutment block. The guide groove has a spherical structure, and the inner cavity of the buffer rod is connected to the guide groove.

[0010] Preferably, a liquid level detector and a temperature sensor are fixedly connected to the outer side of the valve body in sequence via a straight pipe, and a leakage sensor is fixedly connected to the side of the buffer cover via a mounting hole, while a noise sensor is fixedly connected to the outer side of the top cover.

[0011] Compared with the prior art, the beneficial effects of this utility model are: through the cooperation of the guide cover, float, abutment block, valve disc, sealing sleeve, guide cylinder, buffer rod, elastic element and fixing plate, the compensation mechanism has a multi-seal structure. Through the cooperation of the multiple sealing structures, the low-pressure leakage prevention effect of the air valve can be effectively enhanced, ensuring the normal use of the air valve and pipeline. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model.

[0013] Figure 2 This is a bottom view of the guide cover according to an embodiment of the present utility model.

[0014] Figure 3 This is an embodiment of the present utility model. Figure 1 Enlarged diagram of point A.

[0015] Figure 4 This is an embodiment of the present utility model. Figure 1 Enlarged diagram of point B.

[0016] In the diagram: 1. Valve body; 2. Through hole; 3. Guide cover; 4. Float; 5. Through groove; 6. Valve disc; 7. Valve cover; 8. Buffer cover; 9. Dustproof net; 10. Buffer plate; 11. Top cover; 12. Liquid level detector; 13. Temperature sensor; 14. Guide cylinder; 15. Buffer rod; 16. Leakage sensor; 17. Noise sensor; 18. Abutment block; 19. Sealing sleeve; 20. Fixing plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 1 to 4 As shown, this utility model provides an air valve anti-low pressure leakage compensation device, including: a valve body 1, a valve cover 7 fixedly connected to the upper surface of the valve body 1, a dustproof net 9 and a buffer cover 8 fixedly connected to the upper surface of the valve cover 7 respectively, a top cover 11 fixedly connected to the upper surface of the buffer cover 8 by bolts, and a top cover 11 fixedly connected to the upper surface of the dustproof net 9, and a guide cover 3 fixedly connected to the upper end of the inner cavity of the valve body 1, a float ball 4 movably connected inside the guide cover 3, and a valve disc 6 fixedly connected to the lower surface of the valve cover 7 relative to the inner cavity of the valve body 1 by a sealing element, a sealing sleeve 19 fixedly connected to the middle of the valve disc 6, a buffer plate 10 fixedly connected inside the buffer cover 8, a guide cylinder 14 fixedly connected to the middle of the buffer plate 10, and a buffer rod 15 slidably connected to the upper end of the guide cylinder 14, the lower end of the buffer rod 15 passing through the sealing sleeve 19 and fixedly connected to the abutment block 18, and a fixing plate 20 fixedly connected to the upper surface of the guide cylinder 14, and an elastic element fixedly connected between the lower surface of the fixing plate 20 and the upper surface of the buffer rod 15.

[0019] In this embodiment, when water is filled into the empty pipe, the gas inside the pipe will gradually be discharged from the air valve, so that the air valve and its corresponding piping system are in a low-pressure state. When the fluid in the pipe flows into the valve body 1, the gas inside the valve body 1 will flow through the through groove 5 opened in the guide cover 3 to the abutment block 18, and then flow into the inner cavity of the buffer rod 15 from the guide groove of the abutment block 18, and then be discharged from the air valve. When the amount of fluid in the valve body 1 gradually increases, the fluid will first pass through the through hole 2 opened on the lower surface of the guide cover 3, and the float 4 will rise synchronously with the rise of the fluid level due to the buoyancy of the fluid. Then, when the fluid level rises to a certain height, the upper surface of the float 4 will push the abutment block 1. The upward movement of the float 4 allows it to block the guide groove on the lower surface of the abutment block 18, reducing the chance of accidental gas and fluid leakage. During the upward movement of the abutment block 18, the elastic element is compressed by the buffer rod 15, and the elastic element then applies a reaction force to the abutment block 18 through the buffer rod 15, thereby achieving a compensating seal between the abutment block 18 and the float 4. At the same time, the upper surface of the abutment block 18 will compress the sealing sleeve 19, allowing the sealing sleeve 19 to deform on the surfaces of the valve disc 6 and the abutment block 18, so that the sealing sleeve 19 can fit more closely to the surfaces of the valve disc 6 and the abutment block 18, thereby further enhancing the sealing performance at the connection of the valve disc 6 and effectively reducing the chance of low-pressure leakage of the air valve.

[0020] As a preferred embodiment, the guide cover 3 has a cylindrical structure, the lower surface of the guide cover 3 has a spherical protrusion, and multiple sets of through holes 2 are evenly and symmetrically opened on the lower surface of the guide cover 3. Meanwhile, multiple sets of through grooves 5 are opened at equal intervals around the center of the side of the guide cover 3, and all sets of through grooves 5 have a square structure.

[0021] In this embodiment, as Figure 1 and Figure 2 The through hole 2 on the lower surface of the guide cover 3 allows the fluid to contact the float 4 first, so that the fluid surface inside and outside the guide cover 3 can be kept in balance, ensuring that the float 4 can move up synchronously with the fluid surface. Then the float 4 can close the through groove 5 first, reducing the probability of gas and fluid flowing upward to the float 4.

[0022] In a preferred embodiment, the buffer plate 10 fixedly connected inside the buffer cover 8 has a rectangular structure, and the guide cylinder 14 fixedly connected in the middle of the buffer plate 10 has a cylindrical structure, and the upper end of the outer arc surface of the guide cylinder 14 has a threaded structure.

[0023] In this embodiment, as Figure 1 and Figure 4 The buffer plate 10 allows the guide cylinder 14 to be stably fixed above the valve disc 6, facilitating the movement of the buffer rod 15. At the same time, the threaded structure facilitates the screw connection of the fixing plate 20 to the upper end of the guide cylinder 14.

[0024] In a preferred embodiment, the sealing sleeve 19 fixedly connected to the lower surface of the guide cylinder 14 has a cylindrical structure, and the axial section of the sealing sleeve 19 has an I-shaped structure. The inner cavity size of the sealing sleeve 19 is adapted to the outer side size of the buffer rod 15.

[0025] In this embodiment, as Figure 1 and Figure 3 The sealing sleeve 19 can be made of a soft material, which can further enhance the sealing between the sealing sleeve 19 and the valve disc 6 through hole when the sealing sleeve 19 is deformed when the abutment block 18 squeezes the sealing sleeve 19, thus helping to reduce the probability of low-pressure leakage of the air valve.

[0026] In a preferred embodiment, the buffer rod 15 has a cylindrical structure. The dimensions of the outer side of the buffer rod 15 are adapted to the dimensions of the inner cavity of the guide cylinder 14. The upper end of the guide rod is fixedly connected to the lower end of the elastic element, and the upper end of the elastic element is fixedly connected to the fixing plate 20. At the same time, the fixing plate 20 is screwed to the upper end of the guide cylinder 14 through a threaded structure opened in the inner cavity. A through hole is opened in the middle of the fixing plate 20 relative to the position of the inner cavity of the buffer rod 15.

[0027] In this embodiment, as Figure 1 , Figure 3 and Figure 4 The sizes of the buffer rod 15 and the inner cavity of the guide cylinder 14 are matched, which can not only help enhance the stability of the buffer rod 15 when it moves, but also help enhance the sealing of the contact surface between the two. At the same time, the setting of the elastic element allows the buffer rod 15 to apply a corresponding reaction force to the abutment block 18 when it is squeezed, thereby compensating for and enhancing the sealing effect between the abutment block 18 and the float 4.

[0028] In a preferred embodiment, the abutment block 18 fixedly connected to the lower surface of the buffer rod 15 has a square structure. The lower surface of the abutment block 18 has an arc-shaped structure that fits the upper surface of the float 4. A guide groove is opened in the middle of the lower surface of the abutment block 18. The guide groove has a spherical structure, and the inner cavity of the buffer rod 15 is connected to the guide groove.

[0029] In this embodiment, as Figure 1 and Figure 3 The arc-shaped structure on the lower surface of the abutment block 18 helps to enhance the sealing between the abutment block 18 and the float 4 when they come into contact. At the same time, the opening of the guide groove helps to guide the flow direction of the airflow and improve the efficiency of gas discharge.

[0030] In a preferred embodiment, a liquid level detector 12 and a temperature sensor 13 are sequentially fixedly connected to the outer side of the valve body 1 via a straight pipe, and a leakage sensor 16 is fixedly connected to the side of the buffer cover 8 via a mounting hole. At the same time, a noise sensor 17 is fixedly connected to the outer side of the top cover 11.

[0031] In this embodiment, as Figure 1 The installation of the liquid level sensor and temperature sensor 13 enables the air valve to detect the fluid state inside the valve body 1 in real time. The installation of the water leakage sensor 16 can promptly send a signal to the staff when the air valve leaks unexpectedly. At the same time, the installation of the noise sensor 17 can detect the operating status of the air valve in real time. The liquid level sensor, temperature sensor 13, water leakage sensor 16 and noise sensor 17 are electrically connected to the external PLC component.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air valve low-pressure leakage compensation device, comprising: The valve body (1) is characterized in that: a valve cover (7) is fixedly connected to the upper surface of the valve body (1), a dustproof net (9) and a buffer cover (8) are fixedly connected to the upper surface of the valve cover (7), a top cover (11) is fixedly connected to the upper surface of the buffer cover (8) by bolts, and a top cover (11) is fixedly connected to the upper surface of the dustproof net (9), and a guide cover (3) is fixedly connected to the upper end of the inner cavity of the valve body (1), a float ball (4) is movably connected inside the guide cover (3), and the position of the lower surface of the valve cover (7) relative to the inner cavity of the valve body (1) is fixedly connected to the valve disc by a sealing element. (6) A sealing sleeve (19) is fixedly connected to the middle of the valve disc (6), and a buffer plate (10) is fixedly connected inside the buffer cover (8). A guide cylinder (14) is fixedly connected to the middle of the buffer plate (10), and the upper end of the buffer rod (15) is slidably connected inside the guide cylinder (14). The lower end of the buffer rod (15) passes through the sealing sleeve (19) and is fixedly connected to the abutment block (18). A fixing plate (20) is fixedly connected to the upper surface of the guide cylinder (14), and an elastic element is fixedly connected between the lower surface of the fixing plate (20) and the upper surface of the buffer rod (15).

2. The air valve low-pressure leakage compensation device according to claim 1, characterized in that, The guide cover (3) has a cylindrical structure. The lower surface of the guide cover (3) has a spherical protrusion. Multiple sets of through holes (2) are evenly and symmetrically opened on the lower surface of the guide cover (3). Multiple sets of through grooves (5) are opened at equal intervals around the middle of the side of the guide cover (3). At the same time, the multiple sets of through grooves (5) are all square structures.

3. The air valve low-pressure leakage compensation device according to claim 1, characterized in that, The buffer plate (10) fixedly connected inside the buffer cover (8) has a rectangular structure, and the guide cylinder (14) fixedly connected in the middle of the buffer plate (10) has a cylindrical structure, and the upper end of the outer arc surface of the guide cylinder (14) has a threaded structure.

4. The air valve low-pressure leakage compensation device according to claim 1, characterized in that, The sealing sleeve (19) fixedly connected to the lower surface of the guide cylinder (14) has a cylindrical structure, and the axial section of the sealing sleeve (19) has an I-shaped structure. The inner cavity size of the sealing sleeve (19) is compatible with the outer side size of the buffer rod (15).

5. The air valve low-pressure leakage compensation device according to claim 1, characterized in that, The buffer rod (15) has a cylindrical structure. The dimensions of the outer side of the buffer rod (15) are matched with the dimensions of the inner cavity of the guide cylinder (14). The upper end of the guide rod is fixedly connected to the lower end of the elastic element, and the upper end of the elastic element is fixedly connected to the fixing plate (20). At the same time, the fixing plate (20) is screwed to the upper end of the guide cylinder (14) through the thread structure opened in the inner cavity. A through hole is opened in the middle of the fixing plate (20) relative to the position of the inner cavity of the buffer rod (15).

6. The air valve low-pressure leakage compensation device according to claim 1, characterized in that, The abutment block (18) fixedly connected to the lower surface of the buffer rod (15) has a square structure. The lower surface of the abutment block (18) has an arc-shaped structure that fits the upper surface of the float (4). A guide groove is opened in the middle of the lower surface of the abutment block (18). The guide groove has a spherical structure. At the same time, the inner cavity of the buffer rod (15) is connected to the guide groove.

7. The air valve low-pressure leakage compensation device according to claim 1, characterized in that, The valve body (1) is connected to a liquid level detector (12) and a temperature sensor (13) in sequence via a straight pipe on its outer side, and a water leakage sensor (16) is connected to the side of the buffer cover (8) via a mounting hole. At the same time, a noise sensor (17) is connected to the outer side of the top cover (11).

Images