High-low pressure protection device for gas equipment

Abstract

The utility model discloses a gas equipment high pressure and low pressure protection device, including protection valve, aspirator pump, protection valve includes valve body, handle, valve ball, valve body one end is equipped with intake pipe connector, valve body one end far away from intake pipe connector is equipped with exit pipe connector, the valve body one end is equipped with exhaust pipe connector, the valve body one end is equipped with exhaust pipe connector, exhaust pipe one end is equipped with exhaust pipe connector, exhaust pipe one end is equipped with exhaust pipe connector. A protective air outlet pipe is arranged at the other end of the valve body and communicated to an air extracting pump, a valve ball is rotationally connected to the interior of the valve body, a valve rod rotationally connected with the valve body is fixedly connected to the top of the valve ball, and the top of the valve rod penetrates through the upper portion of the valve body and is fixedly connected with a handle; an air inlet and an air outlet are formed in the two sides, close to the air inlet pipe connector and the air outlet pipe connector, of the valve ball respectively, and a protection air inlet is formed in the side, away from the protection air outlet pipe, of the valve ball. Through the arrangement, when a low-pressure or high-pressure condition occurs in the gas pipeline conveyed to the gas equipment, pressure relief protection can be performed in time.

Description

Technical Field

[0001] The utility model relates to the technical field of gas safety, in particular to a high and low pressure protection device for gas equipment. Background Art

[0002] As an important part of the energy sector, the gas industry has shown new characteristics and trends in recent years with the transformation of the global energy structure and the improvement of environmental protection requirements.

[0003] Industry is one of the main demand areas in the gas industry. With the continuous advancement of global industrialization and the acceleration of industrial upgrading, the demand for gas in the industrial field has maintained a steady growth. Especially in some high-energy-consuming and high-emission industries, gas, as a clean and efficient energy form, has a more obvious trend of replacing traditional energy.

[0004] The gas used by gas equipment needs to be continuously transported through gas pipelines to ensure the normal use of the equipment. The gas needs to have specific pressure limits when it is transported in the pipeline to ensure normal transportation. Once the gas pipeline transporting to the gas equipment has insufficient pressure or excessive pressure, it will not only affect the normal use of the gas equipment, but may also cause serious damage to people and buildings. Utility Model Content

[0005] In view of the above-mentioned defects, the utility model provides a high and low pressure protection device for gas equipment which can timely relieve pressure and protect when low pressure or high pressure occurs in the gas pipeline transporting gas to the gas equipment.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a high and low pressure protection device for gas equipment, comprising a protection valve and an air extraction pump, the protection valve comprising a valve body, a handle and a valve ball, one end of the valve body is provided with an air inlet pipe connection port, the end of the valve body away from the air inlet pipe connection port is provided with an air outlet pipe connection port, the other end of the valve body is provided with a protection air outlet pipe connected to the air extraction pump, a valve ball is rotatably connected inside the valve body, a valve stem rotatably connected to the valve body is fixedly connected to the top of the valve ball, the top of the valve stem passes through the top of the valve body and is fixedly connected to the handle, air inlets and air outlets are respectively provided on both sides of the valve ball close to the air inlet pipe connection port and the air outlet pipe connection port, and a protection air inlet is provided on the side of the valve ball away from the protection air outlet pipe.

[0007] As a further improvement of the utility model, the valve body comprises a first valve body, a second valve body and a third valve body which are tightly connected in sequence, and the valve ball is installed inside the second valve body.

[0008] As a further improvement of the utility model, matching threaded fixing holes are opened at the four corners of the first valve body, the second valve body and the third valve body, and the first valve body, the second valve body and the third valve body are fixedly connected by bolts and nuts matching the threaded fixing holes.

[0009] As a further improvement of the utility model, an air inlet sealing ring is provided between the first valve body and the second valve body, and an air outlet sealing ring is provided between the second valve body and the third valve body.

[0010] As a further improvement of the utility model, a first limit block and a second limit block are respectively provided on adjacent two sides of the handle, and the first limit block and the second limit block cooperate with a limit column fixedly connected to the second valve body.

[0011] As a further improvement of the present invention, a sealing ring is provided at the top of the connection between the valve stem and the valve body.

[0012] As a further improvement of the utility model, a Venturi tube is fixedly connected to the protective air outlet pipe.

[0013] As a further improvement of the utility model, the output end of the vacuum pump is connected to the gas tank.

[0014] Beneficial effects of the utility model:

[0015] 1. When low pressure or high pressure is detected in the gas pipeline transporting to the gas equipment, the gas can be completely depressurized by turning the handle of the device. At the same time, the gas in the gas equipment and the gas pipeline can be completely extracted directly through the vacuum pump, which can prevent the gas in the gas equipment from continuing to burn incompletely and causing danger, and can also avoid gas leakage problems.

[0016] 2. By using a Venturi tube, in the protection state, the speed of gas being transported from the protection outlet pipe to the air inlet end of the vacuum pump can be accelerated. The vacuum pump then outputs the gas input from the air inlet end to the gas tank connected to the outlet pipe for sealing, which can effectively prevent gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall equipment diagram of the high and low pressure protection device for gas equipment of the utility model;

[0018] Figure 2 This is the overall assembly drawing of the protection valve;

[0019] Figure 3 This is the exploded view of the protection valve structure;

[0020] Figure 4 It is a schematic diagram of the cross-section of the valve ball.

[0021] In the figure: 1-protective valve, 100-first valve body, 1001-inlet pipe connection port; 101-second valve body, 1010 protection outlet pipe, 1011-limiting column; 102-third valve body, 1020-outlet pipe connection port; 103-handle, 1030-first limiting block, 1031-second limiting block; 104-valve stem; 105-inlet sealing ring; 106-valve ball, 1060-inlet port, 1061-outlet port, 1062-protective inlet port; 107-outlet sealing ring, 2-Venturi tube, 3-vacuum pump. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the utility model. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional terms used are used to illustrate and are not used to limit the utility model. In addition, in all embodiments, the same figure numbers represent the same elements.

[0023] like Figures 1 to 4 A high and low pressure protection device for gas equipment is shown, comprising a protection valve 1, an air extraction pump 3, and a venturi tube 2.

[0024] The protection valve 1 includes a valve body, a handle 103, and a valve ball 106. The shape of the valve body is close to a square. The valve body includes a first valve body 100, a second valve body 101, and a third valve body 102. The first valve body 100, the second valve body 101, and the third valve body 102 are all provided with matching threaded fixing holes at their four corners. The first valve body 100, the second valve body 101, and the third valve body 102 are fixedly connected in sequence by bolts and nuts. An air inlet sealing ring 105 is provided between the first valve body 100 and the second valve body 102, and an air outlet sealing ring 107 is provided between the second valve body 101 and the third valve body 102.

[0025] The first valve body 100 and the third valve body 102 of the valve body are respectively provided with an air inlet pipe connection port 1001 and an air outlet pipe connection port 1020, and the air inlet pipe connection port 1001 and the air outlet pipe connection port 1020 are respectively connected to the gas inlet pipe and the gas outlet pipe. The two ends of the second valve body 101 are respectively connected to the air inlet pipe connection port 1001 and the air outlet pipe connection port 1020, and the other end of the second valve body 101 is provided with a protective air outlet pipe 1010 connected to the interior.

[0026] A valve ball 106 is rotatably connected inside the second valve body 101, and a valve stem 104 is fixedly connected to the top of the valve ball 106. The valve stem 104 passes through the top of the second valve body 101, and the valve stem 104 and the second valve body 101 are rotatably connected. A sealing ring is provided on the top of the connection between the valve stem 104 and the second valve body 101, and a handle 103 is fixedly connected to the top of the valve stem 104. A first limit block 1030 and a second limit block 1031 are respectively provided on adjacent two sides of the connection between the handle 103 and the valve stem 104. The first limit block 1030 and the second limit block 1031 can cooperate with a limit column 1011 fixedly connected to one end of the top of the second valve body 101.

[0027] The valve ball 106 has an air inlet 1060 and an air outlet 1061 at opposite ends thereof. The other end of the valve ball 106 has a protective air inlet 1062 .

[0028] As a further illustration of this example, under normal conditions, the first limit block 1030 cooperates with the limit column 1011, the air inlet 1060 and the air outlet 1061 are respectively connected to the air inlet pipe connection port 1001 of the first valve body 100 and the air outlet pipe connection port 1020 of the third valve body 102, the protective air outlet 1061 is located at one end of the protective air outlet pipe 1010 away from the second valve body 101, and the protective air outlet pipe 1010 of the second valve body 101 is blocked by the valve ball;

[0029] In the protection state, the second limit block 1031 cooperates with the limit column 1011, the protection air inlet 1062 is connected to the air outlet pipe connecting port 1020 of the third valve body 102, the air outlet 1061 is connected to the protection air outlet pipe 1010 of the second valve body 101, and the air inlet pipe connecting port 1001 of the first valve body 100 is blocked by the valve ball.

[0030] A venturi tube 2 is fixedly connected to the protective air outlet pipe 1010 of the second valve body 101, the air inlet end of the venturi tube 2 is connected to the protective air outlet pipe 1010, the air outlet end of the venturi tube 2 is connected to the air inlet end of the air pump 3 through a pipeline, the air outlet end of the air pump 3 is connected to the connecting nozzle of the gas tank (not shown), and a switch valve for controlling the inlet and outlet of the gas is provided on the top of the gas tank.

[0031] As a further illustration of this example, when the vacuum pump 3 is in working state, the gas inside the outlet pipe connected to the third valve body 102 can be extracted to the protective outlet pipe 1010 of the second valve body 101, and the Venturi tube 2 can accelerate the gas to be transported from the protective outlet pipe 1010 to the air inlet end of the vacuum pump 3, and then the vacuum pump 3 outputs the gas input from the air inlet end to the gas tank connected to the outlet pipe for sealing.

[0032] The working principle and use process of this utility model:

[0033] The air inlet pipe connection port 1001 of the protection valve 1 of the device is connected to the air outlet end of the switch cut-off valve in the gas pipeline, and then the air outlet pipe connection port 1020 of the protection valve 1 is connected to the output pipeline in the gas pipeline.

[0034] 1. When the internal pressure of the output pipeline in the gas pipeline is normal, the protection valve 1 is in a normal working state, and the gas is output from the air inlet pipe connection port 1001 of the protection valve 1 to the air outlet pipe connection port 1020 of the protection valve 1, and then acts on the gas engine in the factory through the output pipeline in the gas pipeline.

[0035] 2. When the internal pressure of the output pipeline in the gas pipeline is in an abnormal low-pressure or high-pressure state, the switch shut-off valve is quickly cut off to stop supplying gas to the output pipeline in the gas pipeline, and then the handle 103 on the top of the protection valve 1 is turned to put it in a protection state, and then the switch valve on the top of the gas tank is opened, and the vacuum pump 3 is started to reversely pump the gas from the inside of the output pipeline in the gas pipeline to the gas tank. When the gas in the gas pipeline is exhausted, the vacuum pump 3 and the switch valve on the top of the gas tank are closed, but the protection valve 1 is still in a protection state. After the output pipeline in the gas pipeline is overhauled and can be used normally, the handle 103 is turned again to put it in a normal state, and the use of the entire gas pipeline and the gas engine is restored.

[0036] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above implementation measures. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A high and low pressure protection device for gas equipment, characterized in that: The invention comprises a protection valve (1) and an air extraction pump (3), wherein the protection valve (1) comprises a valve body, a handle (103), and a valve ball (106), wherein one end of the valve body is provided with an air inlet pipe connection port (1001), an end of the valve body away from the air inlet pipe connection port (1001) is provided with an air outlet pipe connection port (1020), and the other end of the valve body is provided with a protection air outlet pipe (1010) connected to the air extraction pump (3), and a valve ball (106) is rotatably connected to the inside of the valve body, and the valve ball (106) is rotatably connected to the inside of the valve body. 06) A valve stem (104) is fixedly connected to the top and rotatably connected to the valve body. The top of the valve stem (104) passes through the top of the valve body and is fixedly connected to the handle (103). The valve ball (106) is provided with an air inlet (1060) and an air outlet (1061) on both sides close to the air inlet pipe connection port (1001) and the air outlet pipe connection port (1020), respectively. The valve ball (106) is provided with a protective air inlet (1062) on the side away from the protective air outlet pipe (1010).

2. The high and low pressure protection device for gas equipment according to claim 1 is characterized in that: The valve body comprises a first valve body (100), a second valve body (101), and a third valve body (102) which are tightly connected in sequence, and the valve ball (106) is installed inside the second valve body (101).

3. The high and low pressure protection device for gas equipment according to claim 2 is characterized in that: Matching threaded fixing holes are provided at four corners of the first valve body (100), the second valve body (101) and the third valve body (102); the first valve body (100), the second valve body (101) and the third valve body (102) are fixedly connected by bolts and nuts matching the threaded fixing holes.

4. The high and low pressure protection device for gas equipment according to claim 2 is characterized in that: An air inlet sealing ring (105) is provided between the first valve body (100) and the second valve body (101), and an air outlet sealing ring (107) is provided between the second valve body (101) and the third valve body.

5. The high and low pressure protection device for gas equipment according to claim 2, characterized in that: A first limit block (1030) and a second limit block (1031) are respectively provided on adjacent two sides of the handle (103), and the first limit block (1030) and the second limit block (1031) cooperate with a limit column (1011) fixedly connected to the second valve body (101).

6. The high and low pressure protection device for gas equipment according to claim 1, characterized in that: A sealing ring is provided at the top of the connection between the valve stem (104) and the valve body.

7. The high and low pressure protection device for gas equipment according to claim 1, characterized in that: The protective air outlet pipe (1010) is fixedly connected to a Venturi tube (2).

8. The high and low pressure protection device for gas equipment according to claim 1, characterized in that: The output end of the air extraction pump (3) is connected to the gas tank.

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