Control valve for liquefied petroleum gas

Abstract

The utility model relates to the technical field of valves, in particular to a control valve for liquefied petroleum gas, which comprises a gas guide pipe, one end of the gas guide pipe is fixedly connected with a gas inlet, the surface of the gas inlet is rotatably connected with a hand wheel, the surface of the gas guide pipe is fixedly connected with a pressure release valve, the pressure release valve comprises a bottom basin, and the bottom basin is fixedly connected with the gas guide pipe. The surface of the air guide pipe is fixedly connected with a leakage-proof assembly, the leakage-proof assembly comprises a push rod, the lower surface of the push rod is fixedly connected with a push rod spring, the push rod spring is used for pushing the push rod upwards, one end of the push rod is slidably connected with a limiting block, and the limiting block is used for limiting upward movement of the push rod; when the pipeline leaks gas, the leakage-proof assembly works to close the valve, the risk of gas leakage is reduced, the barometer is arranged, after the liquefied petroleum gas is used for a period of time, the remaining amount of the gas in the tank cannot be determined, and the remaining amount of the liquefied petroleum gas in the tank can be known through the barometer.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a control valve for liquefied petroleum gas. Background Art

[0002] Liquefied gas ball valve, also known as liquefied gas valve, has a plug-shaped valve disc as the opening and closing part, and the sealing surface is flat or conical. The valve disc moves linearly along the center line of the fluid, and is a forced sealing valve. Generally, it uses formed polytetrafluoroethylene packing, and the handle operating torque is stable to prevent external impurities from entering the valve and maintain the long-term sealing performance of the valve. It is suitable for most high and medium pressure gas transmission occasions.

[0003] Although control valves are designed to regulate and control gas flow, the sealing performance of the valves may be reduced under long-term use or improper operation, resulting in an increased risk of gas leakage. Under extreme environmental conditions, some control valves may have performance degradation and fail to work properly, affecting the stability and reliability of the system. Some control valves are complex in design and require specific skills and experience to operate. Improper or unskilled personnel may cause improper valve operation and increase the risk of leakage.

[0004] In view of this, there is an urgent need for a control valve for liquefied petroleum gas to improve the deficiencies of the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a control valve for liquefied petroleum gas to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides a control valve for liquefied petroleum gas, comprising an air guide pipe, one end of the air guide pipe is fixedly connected to an air inlet, the air inlet is made of rubber, the surface of the air inlet is rotatably connected to a hand wheel, the hand wheel is used for locking, the surface of the air guide pipe is fixedly connected to a pressure relief valve, the pressure relief valve comprises a bottom basin, the bottom basin is fixedly connected to the air guide pipe, the bottom basin is fixedly connected to the air guide pipe, the surface of the air guide pipe is fixedly connected to a leak-proof component, the leak-proof component comprises a push rod, the lower surface of the push rod is fixedly connected to a push rod spring, the push rod spring is used to push the push rod upward, one end of the push rod is slidably connected to a limiting block, the limiting block is used to limit the push rod from moving upward.

[0007] As a further improvement of the technical solution, a pressure gauge is fixedly connected to the surface of the airway tube, and the pressure gauge is used to detect the air pressure inside the airway tube.

[0008] As a further improvement of the present technical solution, a spring is fixedly connected to the upper surface of the bottom basin, a pressure relief spring is fixedly connected to the upper surface of the spring, an upper basin is fixedly connected to the upper surface of the spring, a knob is provided on the upper surface of the upper basin, the interior of the knob is fixedly connected to the pressure relief spring, and the knob is used to control the length of the pressure relief spring.

[0009] As a further improvement of the present technical solution, a leak-proof ball is provided on the upper surface of the push rod, a partition is provided inside the air duct, the leak-proof ball is used to block the air outlet of the partition, and the leak-proof assembly includes a reset rod, which is fixedly connected to a reset spring.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The control valve for liquefied petroleum gas is provided with a leak-proof component, so that the safety performance is improved during use. When the pipeline leaks, the leak-proof component works to close the valve, reducing the risk of leakage. A pressure gauge is provided. After the liquefied petroleum gas has been used for a period of time, the remaining amount of gas in the tank cannot be determined. The remaining amount of liquefied petroleum gas in the tank can be known through the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of Example 1;

[0013] Figure 2 It is a schematic diagram of the overall cross-section structure of Example 1;

[0014] Figure 3 It is a schematic diagram of the structure of the pressure relief valve of Example 1;

[0015] Figure 4 This is a schematic diagram of the structure of the leak-proof component of Example 1.

[0016] The meaning of each number in the figure is:

[0017] 1. Air guide tube; 10. Air inlet; 11. Hand wheel; 12. Air outlet; 13. Air pressure gauge;

[0018] 2. Pressure relief valve; 20. Bottom basin; 21. Shrapnel; 22. Upper basin; 23. Knob; 24. Pressure relief spring;

[0019] 3. Anti-leakage assembly; 30. Push rod; 31. Partition; 32. Limit block; 33. Push rod spring; 34. Reset rod; 35. Reset spring; 36. Anti-leakage ball. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0021] See also Figure 1-Figure 4 As shown, the present embodiment provides a control valve for liquefied petroleum gas, including an air guide pipe 1, one end of the air guide pipe 1 is fixedly connected with an air inlet 10, the air inlet 10 is made of rubber, the surface of the air inlet is rotatably connected with a hand wheel 11, the hand wheel 11 is used for locking, the surface of the air guide pipe 1 is fixedly connected with a pressure relief valve 2, the pressure relief valve 2 includes a bottom basin 20, the bottom basin 20 is fixedly connected to the air guide pipe 1, the bottom basin 20 is fixedly connected to the air guide pipe 1, the surface of the air guide pipe 1 is fixedly connected with a leak-proof component 3, the leak-proof component 3 includes a push rod 30, the lower surface of the push rod 30 is fixedly connected with a push rod spring 33, the push rod spring 33 is used to push the push rod 30 upward, one end of the push rod 30 is slidably connected with a limiting block 32, the limiting block 32 is used to limit the push rod 30 from moving upward.

[0022] The above working principle is: first, connect the air inlet of the valve to the air outlet 12 of the gas tank, turn the hand wheel 11, connect the valve to the air outlet 12 of the gas tank, turn on the switch of the gas tank, and the gas passes through the leak-proof component 3, and then through the pressure relief valve 2 to reach the stove in use. When the stove or the connected pipeline leaks, the air pressure will increase. When the pressure gauge 13 detects that the air pressure is abnormal, the limiting block 32 is pushed so that the limiting block 32 is separated from the push rod 30, and the push rod 30 is pushed upward by the push rod spring 33 to block the valve, so that the gas cannot flow out, thereby improving the safety of use.

[0023] In order to detect air leakage, in this embodiment, a pressure gauge 13 is fixedly connected to the surface of the air duct 1. The pressure gauge 13 is used to detect the air pressure inside the air duct 1. After the gas passes through the pressure relief valve 2, the outflowing gas flow rate is stable. When there is an air leakage, the pressure gauge 13 can show that the outflowing air pressure and flow rate increase.

[0024] In order to keep the flow rate of liquefied petroleum gas stable, in this embodiment, the upper surface of the bottom basin 20 is fixedly connected with a spring 21, the upper surface of the spring 21 is fixedly connected with a pressure relief spring 24, the upper surface of the spring 21 is fixedly connected with an upper basin 22, and the upper surface of the upper basin 22 is provided with a knob 23, the interior of the knob 23 is fixedly connected with the pressure relief spring 24, the knob 23 is used to control the length of the pressure relief spring 24, when the gas passes through, the spring 21 controls the air outlet according to the internal air pressure, when the pressure of the spring is consistent with the pressure under the spring 21, it flows out from the outlet of the pressure relief valve 2, when a small flow of gas is needed, the knob 23 is turned to reduce the pressure of the spring on the spring 21, so as to control the outflowing flow.

[0025] In order to prevent air leakage in the pipeline, in this embodiment, a leak-proof ball 36 is provided on the upper surface of the push rod 30, and a partition 31 is provided inside the air duct 1. The leak-proof ball 36 is used to block the air outlet of the partition 31. The leak-proof component 3 includes a reset rod 34, and the reset rod 34 is fixedly connected to a reset spring 35. When the pipeline leaks, the push rod 30 moves upward, driving the leak-proof ball 36 upward to block the partition 31 and the valve. When it is necessary to reset and continue to use it, the reset rod 34 is pressed to press the leak-proof ball 36 down, and the push rod 30 is restricted by the limiting block 32, that is, the leak-proof ball 36 falls above the push rod 30, and the reset spring 35 restores the reset rod 34 to its original state.

[0026] In the specific use of a control valve for liquefied petroleum gas in the present embodiment, the air inlet of the valve is connected to the air outlet 12 of the gas tank, the hand wheel 11 is turned to connect the valve with the air outlet 12 of the gas tank, the switch of the gas tank is turned on, and the gas passes through the leak-proof component 3 and then through the pressure relief valve 2 to reach the stove used. When the pressure of the spring is consistent with the pressure under the spring 21, it flows out from the outlet of the pressure relief valve 2. When a small flow of gas is needed, the knob 23 is turned to reduce the pressure of the spring on the spring 21, so that the outflow flow can be controlled. After the gas passes through the pressure relief valve 2, the outflowing gas flow is stable. When When there is a gas leak, the barometer 13 can show that the outflowing gas pressure and flow rate increase will cause the gas pressure to increase. When the stove or the connected pipe leaks, when the barometer 13 detects that the air pressure is abnormal, the limiting block 32 is pushed to make the limiting block 32 disengage from the push rod 30, and the push rod 30 is pushed upward by the push rod spring 33 to block the valve, so that the gas cannot flow out, thereby improving the safety of use. When it is necessary to reset and continue to use, the reset rod 34 is pressed to press the anti-leakage ball 36, and the push rod 30 is restricted by the limiting block 32, that is, the anti-leakage ball 36 falls above the push rod 30, and the reset spring 35 restores the reset rod 34 to its original state.

[0027] 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 descriptions are only preferred examples of the utility model and are not used to limit 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 of the utility model is defined by the attached claims and their equivalents.

Claims

1. A control valve for liquefied petroleum gas, comprising a gas guide pipe (1), characterized in that: One end of the air guide tube (1) is fixedly connected to an air inlet (10), the air inlet (10) is made of rubber, the surface of the air inlet (10) is rotatably connected to a hand wheel (11), the hand wheel (11) is used for locking, the surface of the air guide tube (1) is fixedly connected to a pressure relief valve (2), the pressure relief valve (2) comprises a bottom basin (20), the bottom basin (20) is fixedly connected to the air guide tube (1), the surface of the air guide tube (1) is fixedly connected to a leak-proof component (3), the leak-proof component (3) comprises a push rod (30), the lower surface of the push rod (30) is fixedly connected to a push rod spring (33), the push rod spring (33) is used to push the push rod (30) upwards, one end of the push rod (30) is slidably connected to a limiting block (32), the limiting block (32) is used to limit the upward movement of the push rod (30).

2. The control valve for liquefied petroleum gas according to claim 1, characterized in that: A pressure gauge (13) is fixedly connected to the surface of the air guide tube (1), and the pressure gauge (13) is used to detect the air pressure inside the air guide tube (1).

3. The control valve for liquefied petroleum gas according to claim 1, characterized in that: The upper surface of the bottom basin (20) is fixedly connected to a spring sheet (21), the upper surface of the spring sheet (21) is fixedly connected to a pressure relief spring (24), the upper surface of the spring sheet (21) is fixedly connected to an upper basin (22), the upper surface of the upper basin (22) is provided with a knob (23), the interior of the knob (23) is fixedly connected to the pressure relief spring (24), and the knob (23) is used to control the length of the pressure relief spring (24).

4. The control valve for liquefied petroleum gas according to claim 1, characterized in that: The upper surface of the push rod (30) is provided with a leak-proof ball (36), the interior of the air guide tube (1) is provided with a partition (31), the leak-proof ball (36) is used to block the air outlet of the partition (31), and the leak-proof assembly (3) comprises a reset rod (34), and the reset rod (34) is fixedly connected to a reset spring (35).

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