Stop valve with pressure relief protection function

Abstract

The utility model discloses a stop valve with a pressure relief protection function, and relates to the technical field of stop valves. Comprising a valve body, a connecting cylinder and a mounting cylinder, a pressure relief opening is formed in the bottom end of the valve body in a penetrating mode, a connecting column is movably arranged in a supporting plate in a penetrating mode, a combination column is arranged at the top end of the connecting column, and a blocking column is arranged at the top end of the combination column. According to the pressure relief valve, components such as the blocking column are arranged, when the pressure in the valve body is high and the valve is opened, liquid in the valve body can exert pressure on the blocking column in the pressure relief opening to push the blocking column, so that the connecting column moves downwards in the supporting plate, the spring can be extruded to deform in the downward moving process of the combined column, and at the moment, the pressure in the valve body is reduced. The pressure relief opening is communicated with the interior of the mounting cylinder, liquid in the valve body can be discharged through the mounting cylinder, pressure relief protection is carried out on the stop valve in use, the probability of damage to pipeline parts of the stop valve is reduced, the structure is simple and practical, and the occupied space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a stop valve with a pressure relief protection function. Background Art

[0002] The stop valve, also known as the gate valve, is a commonly used valve type and a forced sealing valve. When the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. The working principle of the stop valve is to rely on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of medium. The sealing pair of the stop valve is composed of the valve disc sealing surface and the valve seat sealing surface. The valve stem drives the valve disc to move vertically along the center line of the valve seat. During the opening and closing process of the stop valve, the opening height is small, the flow rate is easy to adjust, and it is easy to manufacture and maintain, and the pressure application range is wide.

[0003] At present, most of the existing stop valves are used in conjunction with pressure relief valves. When the pressure in the pipeline is too high, the pressure relief valve is used to relieve the pressure inside the pipeline to reduce the probability of damage to pipeline components. Since the existing stop valve and pressure relief valve are installed separately, they occupy a large space. In order to solve this technical problem, the utility model proposes a stop valve with pressure relief protection function. Utility Model Content

[0004] The main purpose of the utility model is to provide a stop valve with a pressure relief protection function, which can effectively solve the problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A stop valve with a pressure relief protection function comprises a valve body, a connecting tube and a mounting tube, wherein a pressure relief port is formed through the bottom end of the valve body, and the pressure relief port is located above the mounting tube, a support plate is provided on the inner wall of the mounting tube, a connecting column is movably provided inside the support plate, a combination column is provided at the top end of the connecting column, a blocking column is provided at the top end of the combination column, and the blocking column is movably connected to the pressure relief port, a spring is provided on the outside of the connecting column, and the bottom end of the spring is connected to the top end of the support plate, the top end of the spring is connected to the bottom end of the combination column, and a valve is provided at the bottom end of the mounting tube.

[0007] Preferably, the connection tube is internally connected and installed on the top end of the valve body, and a sealing cover plate is detachably provided on the top end of the connection tube.

[0008] Preferably, a blocking column is movably provided inside the connecting tube, a valve stem is provided at the top end of the blocking column, and a turntable is provided at the top end of the valve stem.

[0009] Preferably, a filling block is provided inside the valve body, and the filling block is movably connected to the blocking column.

[0010] Preferably, a flow block is provided inside the valve body, and the flow block is an arc-shaped slope block, and the flow block is located above the pressure relief port.

[0011] Preferably, the mounting cylinder is connected and mounted on the bottom end of the valve body, and a slope is provided on the top end of the blocking column.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] When the closure is opened, the valve body is opened and the pressure relief valve is lifted up, so that the closure valve can be easily opened and the valve body is easily disengaged. In the utility model, by providing components such as a blocking column, when the pressure inside the valve body is high, when the valve is opened, the liquid inside the valve body can exert pressure on the blocking column inside the pressure relief port, so that the connecting column moves downward inside the support plate. During the downward movement of the combined column, the spring can be squeezed and deformed. At this time, the pressure relief port and the interior of the mounting tube are in a through state. The liquid inside the valve body can be discharged through the mounting tube, thereby providing pressure relief protection for the stop valve in use and reducing the probability of damage to the stop valve pipeline components. The structure is simple and practical and occupies less space.

[0014] In the utility model, components such as a baffle block are provided, which can shield and protect the pressure relief port to prevent excessive impact force when liquid enters, causing impact to open the blocking column, so that the blocking column will not be affected by the impact force of the medium. The diameter of the valve body can be reduced by providing the baffle block inside the valve body. When the liquid flows through the baffle block pipeline section, the liquid flow rate will increase due to inertia, while the pressure will decrease, thereby effectively protecting the normal use of the blocking column. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a stop valve with a pressure relief protection function according to the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a flow block of a stop valve with a pressure relief protection function according to the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of a stop valve with a pressure relief protection function according to the utility model;

[0018] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of the installation cylinder of a stop valve with a pressure relief protection function.

[0019] In the figure: 1. valve body; 2. connecting cylinder; 3. sealing cover plate; 4. valve stem; 5. turntable; 6. blocking column; 7. filling block; 8. pressure relief port; 9. flow block; 10. mounting cylinder; 11. valve; 12. support plate; 13. connecting column; 14. combination column; 15. blocking column; 16. spring. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a stop valve with pressure relief protection function;

[0022] It includes a valve body 1, a connecting tube 2 and an installation tube 10. A pressure relief port 8 is opened through the bottom end of the valve body 1, and the pressure relief port 8 is located above the installation tube 10. A support plate 12 is provided on the inner wall of the installation tube 10. A connecting column 13 is movably provided inside the support plate 12. A combination column 14 is provided at the top end of the connecting column 13. A blocking column 15 is provided at the top end of the combination column 14, and the blocking column 15 is movably connected to the pressure relief port 8. A spring 16 is provided on the outside of the connecting column 13, and the bottom end of the spring 16 is connected to the top end of the support plate 12, and the top end of the spring 16 is connected to the bottom end of the combination column 14. A valve 11 is provided at the bottom end of the installation tube 10.

[0023] The pressure relief port 8 is opened at the bottom end of the valve body 1 through a penetration. After the plugging column 15 connected to the pressure relief port 8 is separated from the pressure relief port 8, the liquid in the valve body 1 can flow into the interior of the mounting cylinder 10. The mounting cylinder 10 is used to provide an installation space for the plugging column 15, the combination column 14 and the connecting column 13 inside. The diameter of the inside of the mounting cylinder 10 is larger than the diameter of the plugging column 15, the combination column 14 and the connecting column 13. The support plate 12 is used to provide support for the spring 16, and then the connecting column 13 moves through the inside of the support plate 12, and the spring 16 is inserted into the valve body 1. When the pressure in the upper part is high, when the valve 11 is opened, the liquid inside the valve body 1 can pressurize the blocking column 15 inside the pressure relief port 8, so that the connecting column 13 moves downward inside the support plate 12. During the downward movement of the combined column 14, the spring 16 can be squeezed and deformed. At this time, the pressure relief port 8 and the interior of the mounting tube 10 are in a through state, and the liquid inside the valve body 1 can be discharged through the mounting tube 10, so as to provide pressure relief protection for the stop valve in use and reduce the probability of damage to the stop valve pipeline components. The structure is simple and practical and occupies less space.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a stop valve with pressure relief protection function;

[0025] The connecting tube 2 is internally connected and installed on the top of the valve body 1. The top of the connecting tube 2 is detachably provided with a sealing cover plate 3. The connecting tube 2 is internally provided with a blocking column 6 movably. The top of the blocking column 6 is provided with a valve stem 4. The top of the valve stem 4 is provided with a turntable 5. The valve body 1 is internally provided with a filling block 7, and the filling block 7 is movably connected with the blocking column 6 in an engaging manner.

[0026] The valve body 1 is a main pipeline component of the stop valve. The valve body 1 can be used to allow liquid to circulate. A pressure gauge can be provided inside the valve body 1 to facilitate the user to adjust whether the valve 11 is used according to the pressure gauge, thereby providing pressure relief protection for the inside of the valve body 1. The connecting tube 2 is connected to the inside of the valve body 1, and the connecting tube 2 can limit the upper and lower guides and store the blocking column 6. During the rotation of the valve stem 4 by the turntable 5, the use position of the blocking column 6 can be adjusted. By inserting the blocking column 6 into the filling block 7, the blocking column 6 can block the inside of the valve body 1 to control the flow of liquid.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a stop valve with pressure relief protection function;

[0028] A baffle block 9 is provided inside the valve body 1, and the baffle block 9 is an arc-shaped slope block, and the baffle block 9 is located above the pressure relief port 8. The mounting tube 10 is connected and installed at the bottom end of the valve body 1, and a slope is provided at the top of the blocking column 15.

[0029] The baffle block 9 is designed to be an arc-shaped slope, and the baffle block 9 can shield and protect the pressure relief port 8 to prevent the excessive impact force when the liquid enters from causing the blocking column 15 to be impacted and opened, so that the blocking column 15 will not be affected by the impact force of the medium. The setting of the baffle block 9 inside the valve body 1 can reduce the diameter size inside the valve body 1. When the liquid flows through the pipeline section of the baffle block 9, due to inertia, the liquid flow rate will increase and the pressure will decrease, which effectively protects the normal use of the blocking column 15.

[0030] When in use, the use position of the blocking column 6 can be adjusted during the process of rotating the valve stem 4 by the turntable 5. By inserting the blocking column 6 into the filling block 7, the blocking column 6 can block the inside of the valve body 1 to control the flow of the liquid. The flow blocking block 9 can shield and protect the pressure relief port 8 to avoid the situation where the impact force of the liquid entering is too large, resulting in the impact and opening of the blocking column 15, so that the blocking column 15 will not be affected by the impact force of the medium. In addition, the setting of the flow blocking block 9 inside the valve body 1 can reduce the diameter size inside the valve body 1. When the liquid flows through the pipeline section of the flow blocking block 9, due to the effect of inertia, the liquid flow rate will increase, and the pressure will decrease, which effectively protects the normal use of the blocking column 15.

[0031] When the pressure inside the valve body 1 is high and the valve 11 is open, the liquid inside the valve body 1 can pressurize and push the blocking column 15 inside the pressure relief port 8, so that the connecting column 13 moves downward inside the support plate 12. During the downward movement of the combined column 14, the spring 16 can be squeezed and deformed. At this time, the pressure relief port 8 and the interior of the mounting tube 10 are in a through state, and the liquid inside the valve body 1 can be discharged through the mounting tube 10, thereby providing pressure relief protection for the stop valve in use and reducing the probability of damage to the stop valve pipeline components. The structure is simple and practical and occupies less space.

[0032] The above shows and describes the basic principle and main features of the utility model and the 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 descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which 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 stop valve with a pressure relief protection function, comprising a valve body (1), a connecting tube (2) and a mounting tube (10), characterized in that: A pressure relief port (8) is provided through the bottom end of the valve body (1), and the pressure relief port (8) is located above the mounting tube (10); a support plate (12) is provided on the inner wall of the mounting tube (10); a connecting column (13) is movably provided inside the support plate (12); a combination column (14) is provided at the top end of the connecting column (13); a blocking column (15) is provided at the top end of the combination column (14), and the blocking column (15) is movably connected to the pressure relief port (8); a spring (16) is provided on the outer side of the connecting column (13), and the bottom end of the spring (16) is connected to the top end of the support plate (12); the top end of the spring (16) is connected to the bottom end of the combination column (14); and a valve (11) is provided at the bottom end of the mounting tube (10).

2. A stop valve with pressure relief protection function according to claim 1, characterized in that: The connection tube (2) is internally connected and installed on the top end of the valve body (1), and a sealing cover plate (3) is detachably provided on the top end of the connection tube (2).

3. A stop valve with pressure relief protection function according to claim 2, characterized in that: A blocking column (6) is movably arranged inside the connecting cylinder (2), a valve stem (4) is arranged at the top end of the blocking column (6), and a rotating disk (5) is arranged at the top end of the valve stem (4).

4. The stop valve with pressure relief protection function according to claim 3 is characterized in that: A filling block (7) is arranged inside the valve body (1), and the filling block (7) is movably connected to the blocking column (6) by being engaged with the filling block (7).

5. The stop valve with pressure relief protection function according to claim 1, characterized in that: A flow block (9) is arranged inside the valve body (1), and the flow block (9) is an arc-shaped slope block, and the flow block (9) is located above the pressure relief port (8).

6. The stop valve with pressure relief protection function according to claim 1, characterized in that: The installation cylinder (10) is connected and installed at the bottom end of the valve body (1), and the top end of the blocking column (15) is provided with a slope.

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