Water conservancy safety protection valve

Abstract

The utility model discloses a water conservancy safety protection valve, and relates to the technical field of water conservancy projects. A water inlet pipe and a water outlet pipe are fixedly installed on the two side walls of the valve body, a valve cavity is formed in the valve body, the water inlet pipe and the water outlet pipe are communicated with the valve cavity, a ball valve body is rotatably installed in the valve cavity, a valve rod is rotatably installed on the top of the valve body, and a hand wheel is fixedly installed on the top of the valve rod. The valve rod longitudinally penetrates through the valve body and is fixedly connected with the ball valve body, and a pressure relief mechanism is arranged at the bottom of the valve body. The pressure relief mechanism is arranged, so that when the internal pressure of the device is too large, automatic pressure relief can be conducted through the water conveying pipe, safety and practicability of the valve body and the water conveying pipe are effectively guaranteed, and practicability of the device is greatly improved; and the device can change a pressure relief numerical value area by adjusting the gas pressure in the gas tank and the gas cavity, so that the applicability of the device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, in particular to a water conservancy safety protection valve. Background Art

[0002] Hydraulic control valve is one of the most common valves in people's daily life. In the fluid pipeline system, the valve is a control element. Its main function is to isolate equipment and pipeline system, adjust flow, prevent backflow, and adjust and discharge pressure. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Since it is very important to choose the most suitable valve for the pipeline system, it is also very important to understand the characteristics of the valve and the steps and basis for selecting the valve.

[0003] In the Chinese patent publication number CN220204709U, a hydraulic valve is disclosed, including: a valve body, a groove is provided in the middle of the bottom of the valve body, a first sealing ring is fixedly installed inside the upper end of the valve body, and a valve plate is provided on the surface of the first sealing ring. The utility model is provided with the arrangement of components such as the groove, the valve plate and the sand cleaning assembly. When the groove inside the gate valve is sand cleaned, the flow inside the valve body is first intercepted by closing the valve plate. At the same time, there is a certain amount of water inside the groove, and the T-type push rod is pushed upward to release the seal of the top of the T-type push rod with the conical surface at the bottom of the groove. At this time, the sand and stone particles inside the groove are discharged to the outside of the valve body along with the water flow retained in the groove. Through regular discharge, small foreign particles such as sand are prevented from accumulating in the groove at the bottom of the valve body, causing the hydraulic gate valve to be unable to close tightly and leak.

[0004] In actual use, when the valve body is closed, since the valve body does not have a pressure relief structure, when the internal pressure of the fluid is too high and cannot be relieved in time, it is easy to cause damage to the valve body and the pipeline, making the valve body and the pipeline unable to be used normally.

[0005] For this reason, a water conservancy safety protection valve is proposed. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that in actual use, when the valve body is closed, the valve body does not have a pressure relief structure. When the internal pressure of the fluid is too large and no timely pressure relief treatment is obtained, the valve body and the pipeline are easily damaged, making the valve body and the pipeline unable to be used normally. The utility model provides a water conservancy safety protection valve.

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] A water conservancy safety protection valve comprises a valve body, a water inlet pipe and a water outlet pipe are fixedly installed on both side walls of the valve body, a valve cavity is built in the valve body, the water inlet pipe and the water outlet pipe are connected with the valve cavity, a ball valve body is rotatably installed in the valve cavity, a valve stem is rotatably installed on the top of the valve body, a hand wheel is fixedly installed on the top of the valve stem, the valve stem longitudinally penetrates the valve body and is fixedly connected with the ball valve body, and a pressure relief mechanism is arranged at the bottom of the valve body;

[0009] Specifically, when the safety protection valve is put into use, after the ball valve body is closed, the valve body blocks the flow of the medium. At the same time, after the medium pipeline is intercepted, the internal pressure of the pipeline rises. At this time, the pressure relief mechanism causes the pressure relief mechanism to release the pressure in the valve body.

[0010] Furthermore, the pressure relief mechanism includes a water pipe, a rubber ring, a blocking plug, a piston rod, a gas tank, a connecting joint, an air pipe, an air cavity, a booster spring, a piston, a partition and a drain pipe. The water pipe is fixedly installed at the bottom of the water inlet pipe, and the water pipe is arranged in an "L" shape. The drain pipe is fixedly installed on the top of the water pipe, and the top of the drain pipe is fixedly connected to the water outlet pipe. A partition is fixedly installed on the inner wall of the water pipe, and the partition and the inner wall of one side of the water pipe form a group of air cavities. The air pipe is fixedly installed on one side wall of the air cavity, and a connecting joint is fixedly installed on the free end of the air pipe. The gas tank is threadedly installed on the connecting joint, and the gas tank is connected to the air cavity through the air pipe. A piston is slidably installed in the air cavity, and the piston is located on one side of the drain pipe and fixedly installed with a piston rod. The piston rod transversely penetrates the partition and is slidably connected to the partition. The free end of the piston rod is fixedly installed with a blocking plug, and the blocking plug is located on the other side of the drain pipe.

[0011] Specifically, when the pressure in the pipeline is too high, the pressure in the water pipe increases, squeezing the blocking plug, causing the blocking plug to move laterally. At this time, the piston rod squeezes the gas in the air cavity, and the water flow in the water pipe is depressurized through the drain pipe. When the pressure is balanced, the pressurized gas in the gas tank is reset to the air cavity. At this time, the piston rod and the blocking plug are reset to block the drain pipe.

[0012] Furthermore, the free ends of the water inlet pipe and the water outlet pipe are fixedly mounted with connecting flanges, and connecting holes are provided on the connecting flanges.

[0013] Furthermore, the air cavity contains pressurized gas, a booster spring is fixedly mounted on one side wall of the air cavity, and a free end of the booster spring is fixedly connected to the piston.

[0014] Furthermore, the gas pipeline is arranged in an "L"-shaped structure, and the gas tank and the water pipeline are arranged horizontally; specifically, the overall volume of the safety protection valve is reduced.

[0015] Furthermore, a seal is provided at the connection between the piston rod and the partition plate to prevent the medium in the water pipe from entering the air cavity.

[0016] Furthermore, the outer side walls of the blocking plug and the piston rod are both provided with the same rubber rings, and the number of rubber rings is two groups and they are located sequentially on the two side walls of the blocking plug and the piston rod; specifically, the use of rubber rings can effectively ensure the sealing degree of the blocking plug and the piston rod.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. The utility model is provided with a pressure relief mechanism, so that the device can automatically relieve pressure through the water pipe when the internal pressure is too large, effectively ensuring the safety and practicality of the valve body and the water pipe, greatly improving the practicality of the device. At the same time, the use of the air cavity and the air tank enables the device to change the numerical range of pressure relief by adjusting the gas pressure inside the gas tank and the air cavity, thereby greatly improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the position structure of the ball valve body of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the pressure relief mechanism of the utility model;

[0022] Figure numerals: 1. hand wheel; 2. valve stem; 3. pressure relief mechanism; 4. valve body; 5. connecting flange; 6. water inlet pipe; 7. valve chamber; 8. ball valve body; 9. water outlet pipe; 10. water supply pipe; 11. drain pipe; 12. partition; 13. piston; 14. booster spring; 15. air cavity; 16. air supply pipe; 17. connecting joint; 18. air tank; 19. piston rod; 20. blocking plug; 21. rubber ring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] like Figures 1 to 3 As shown, a water conservancy safety protection valve comprises a valve body 4, a water inlet pipe 6 and a water outlet pipe 9 are fixedly installed on both side walls of the valve body 4, a valve cavity 7 is built in the valve body 4, the water inlet pipe 6 and the water outlet pipe 9 are connected with the valve cavity 7, a ball valve body 8 is rotatably installed in the valve cavity 7, a valve stem 2 is rotatably installed on the top of the valve body 4, a hand wheel 1 is fixedly installed on the top of the valve stem 2, the valve stem 2 longitudinally penetrates the valve body 4 and is fixedly connected with the ball valve body 8, and a pressure relief mechanism 3 is arranged at the bottom of the valve body 4;

[0028] Specifically, when the safety protection valve is put into use, after the ball valve body 8 is closed, the valve body 4 blocks the flow of the medium. At the same time, after the medium pipeline is intercepted, the internal pressure of the pipeline rises. At this time, the pressure relief mechanism 3 causes the pressure relief mechanism 3 to relieve the pressure in the valve body 4.

[0029] like Figures 1 to 3As shown, the pressure relief mechanism 3 includes a water pipe 10, a rubber ring 21, a blocking plug 20, a piston rod 19, an air tank 18, a connecting joint 17, an air pipe 16, an air cavity 15, a booster spring 14, a piston 13, a partition 12 and a drain pipe 11. The water pipe 10 is fixedly installed at the bottom of the water inlet pipe 6. The water pipe 10 is arranged in an "L" shape. The drain pipe 11 is fixedly installed on the top of the water pipe 10. The top of the drain pipe 11 is fixedly connected to the water outlet pipe 9. The inner side wall of the water pipe 10 is fixedly installed with a partition 12. The partition 12 forms a connection with the inner wall of one side of the water pipe 10. An air cavity 15 is formed, a gas pipe 16 is fixedly installed on one side wall of the air cavity 15, a connecting joint 17 is fixedly installed on the free end of the gas pipe 16, a gas tank 18 is threadedly installed on the connecting joint 17, the gas tank 18 is connected with the air cavity 15 through the gas pipe 16, a piston 13 is slidably installed in the air cavity 15, the piston 13 is located on one side of the drain pipe 11 and a piston rod 19 is fixedly installed, the piston rod 19 horizontally penetrates the partition 12 and is slidably connected to the partition 12, a blocking plug 20 is fixedly installed on the free end of the piston rod 19, and the blocking plug 20 is located on the other side of the drain pipe 11;

[0030] Specifically, when the pressure in the pipeline is too high, the pressure in the water pipe 10 increases, squeezing the blocking plug 20, causing the blocking plug 20 to move laterally. At this time, the piston rod 19 squeezes the gas in the air cavity 15, and the water flow in the water pipe 10 is depressurized through the drain pipe 11. When the pressure is balanced, the pressurized gas in the gas tank 18 is reset to the air cavity 15. At this time, the piston rod 19 and the blocking plug 20 are reset to block the drain pipe 11.

[0031] like Figures 1 to 3 As shown, the free ends of the water inlet pipe 6 and the water outlet pipe 9 are fixedly mounted with connecting flanges 5, and connecting holes are provided on the connecting flanges 5.

[0032] like Figures 1 to 3 As shown, the air cavity 15 contains pressurized gas, and a booster spring 14 is fixedly mounted on one side wall of the air cavity 15 . The free end of the booster spring 14 is fixedly connected to the piston 13 .

[0033] like Figures 1 to 3 As shown, the gas pipe 16 is arranged in an "L"-shaped structure, and the gas tank 18 and the water pipe 10 are arranged horizontally; specifically, the overall volume of the safety protection valve is reduced.

[0034] like Figures 1 to 3 As shown, a seal is provided at the connection between the piston rod 19 and the partition 12 to prevent the medium in the water pipe 10 from entering the air cavity 15 .

[0035] like Figures 1 to 3As shown, the outer side walls of the blocking plug 20 and the piston rod 19 are both provided with the same rubber ring 21, and the number of the rubber ring 21 is two groups and they are sequentially located at the two side walls of the blocking plug 20 and the piston rod 19; specifically, the use of the rubber ring 21 can effectively ensure the sealing degree of the blocking plug 20 and the piston rod 19.

[0036] In summary: when the safety protection valve is put into use, after the ball valve body 8 is closed, the valve body 4 blocks the flow of the medium. At the same time, after the medium is intercepted in the pipeline, the internal pressure of the pipeline rises. At this time, the pressure relief mechanism 3 causes the pressure relief mechanism 3 to relieve the pressure in the valve body 4. When the pressure in the pipeline is too large, the pressure in the water pipe 10 increases, squeezing the blocking plug 20, causing the blocking plug 20 to move laterally. At this time, the piston rod 19 squeezes the gas in the air cavity 15, and the water flow in the water pipe 10 is depressurized through the drain pipe 11. When the pressure is balanced, the pressurized gas in the gas tank 18 is reset to the air cavity 15. At this time, the piston rod 19 and the blocking plug 20 are reset to block the drain pipe 11.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydraulic safety protection valve, characterized in that: The valve body (4) comprises a valve body (4), a water inlet pipe (6) and a water outlet pipe (9) are fixedly mounted on both side walls of the valve body (4), a valve chamber (7) is internally formed in the valve body (4), the water inlet pipe (6) and the water outlet pipe (9) are connected to the valve chamber (7), a ball valve body (8) is rotatably mounted in the valve chamber (7), a valve stem (2) is rotatably mounted on the top of the valve body (4), a hand wheel (1) is fixedly mounted on the top of the valve stem (2), the valve stem (2) longitudinally penetrates the valve body (4) and is fixedly connected to the ball valve body (8), and a pressure relief mechanism (3) is arranged at the bottom of the valve body (4); The pressure relief mechanism (3) comprises a water pipe (10), a rubber ring (21), a blocking plug (20), a piston rod (19), an air tank (18), a connecting joint (17), an air pipe (16), an air cavity (15), a booster spring (14), a piston (13), a partition (12) and a water discharge pipe (11). The water pipe (10) is fixedly mounted on the bottom of the water inlet pipe (6). The water pipe (10) is arranged in an "L"-shaped structure. The water discharge pipe (11) is fixedly mounted on the top of the water pipe (10). The top end of the water discharge pipe (11) is fixedly connected to the water outlet pipe (9). The partition (12) is fixedly mounted on the inner side wall of the water pipe (10). The partition (12) forms a connection with the inner wall of one side of the water pipe (10). A group of air cavities (15) is provided, a gas delivery pipe (16) is fixedly mounted on one side wall of the gas cavity (15), a connecting joint (17) is fixedly mounted on the free end of the gas delivery pipe (16), a gas tank (18) is threadedly mounted on the connecting joint (17), the gas tank (18) is connected to the gas cavity (15) through the gas delivery pipe (16), a piston (13) is slidably mounted in the gas cavity (15), the piston (13) is located on one side of the drain pipe (11) and is fixedly mounted with a piston rod (19), the piston rod (19) transversely penetrates the partition (12) and is slidably connected to the partition (12), a blocking plug (20) is fixedly mounted on the free end of the piston rod (19), and the blocking plug (20) is located outside the other side of the drain pipe (11).

2. A hydraulic safety protection valve according to claim 1, characterized in that: The free ends of the water inlet pipe (6) and the water outlet pipe (9) are fixedly mounted with connecting flanges (5), and the connecting flanges (5) are provided with connecting holes.

3. A hydraulic safety protection valve according to claim 1, characterized in that: The air cavity (15) contains pressurized gas, and a booster spring (14) is fixedly mounted on one side wall of the air cavity (15), wherein the free end of the booster spring (14) is fixedly connected to the piston (13).

4. A hydraulic safety protection valve according to claim 1, characterized in that: The gas delivery pipe (16) is arranged in an "L"-shaped structure, and the gas tank (18) and the water delivery pipe (10) are arranged horizontally.

5. A hydraulic safety protection valve according to claim 1, characterized in that: A sealing member is provided at the connection between the piston rod (19) and the partition plate (12).

6. A hydraulic safety protection valve according to claim 1, characterized in that: The outer side walls of the blocking plug (20) and the piston rod (19) are both provided with identical rubber rings (21), and the rubber rings (21) are provided in two groups and are sequentially located on the two side walls of the blocking plug (20) and the piston rod (19).

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