Pressure relief device of pressure vessel

Abstract

The utility model discloses a pressure relief device for a pressure vessel, which comprises a briquetting machine and a working box of the briquetting machine, the upper surface of the working box is a cover plate, one side plate of the working box is an extrusion block, and a plurality of pricking needles are uniformly arranged on the inner surface of the extrusion block. The pressure relief device for the pressure vessel is improved on the basis of a briquetting machine, and can be suitable for needling pressure relief of pressure vessels with different heights and different diameters. According to the pressure relief device, the pressure relief safety is guaranteed, meanwhile, the number of operators is reduced, and the field working condition environment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerosol pressure tank container disposal, and in particular relates to a pressure relief device for a pressure container. Background Art

[0002] In the hazardous waste incineration disposal industry, some of the incineration materials are small pressure vessels, such as spray paint bottles, rust remover bottles, air fresheners, antifreeze, etc. If they are directly put into the kiln for incineration without pressure relief, the pressure vessels will explode under the high temperature in the furnace, which will have a great impact on the incineration conditions in a short period of time, and may even cause the incineration flue gas to fail to meet the standards; if the pressure vessel is manually depressurized with an iron cone, there will also be a risk of explosion during the pressure relief, causing unpredictable harm to personnel.

[0003] There are some pressure relief devices disclosed in the prior art, such as a Chinese patent with publication number CN219004063 U that discloses an aerosol can pressure relief device, in which the aerosol can is placed vertically in a fixed groove, and a puncture needle is set in the fixed groove, pressing the aerosol can from the top of the aerosol can and piercing the aerosol can from the bottom. A Chinese patent with publication number CN212285522 U discloses a self-spray can pressure relief device, which is to punch holes at the end of the self-spray can to relieve pressure. Both of the above two pressure relief devices relieve pressure from the two ends of the pressure tank, but the end of the self-spray can is generally harder than its side wall, which is not easy to punch holes and more laborious. A Chinese patent with publication number CN111774411A discloses a pressure relief device for compressed gas cylinders. Although the pressure relief device technology can stably clamp the compressed gas cylinder when the puncture needle pierces the bottle body, the structure is relatively complex, and only one pressure tank can be processed at a time, which is not efficient. The Chinese patent with publication number CN203108928U discloses a pressure-relief device for pressure-filled bottles. The pressure-filled bottles are placed in a hollow explosion-proof tube to prevent the fragments of the pressure-filled bottles from flying around. However, the explosion-proof tube has a fixed size. Pressure-filled bottles with a similar size to the explosion-proof tube can be well decompressed. However, pressure-filled bottles with a diameter smaller than the diameter of the explosion-proof tube cannot be fixed in the explosion-proof tube and cannot be decompressed. The Chinese patent with publication number CN217289743 U discloses a safety recycling device for waste aerosol cans. It has a first needle for puncturing and decompressing the side wall of the waste aerosol can and a second needle for puncturing and decompressing the bottom of the waste aerosol can. However, the recycling device is only suitable for waste aerosol cans of fixed height, and cannot be decompressed smoothly for aerosol cans of different heights and diameters. Summary of the invention

[0004] In view of the above problems existing in the prior art, the utility model provides a pressure relief device for a pressure vessel, which performs pressure relief by acupuncture on the side wall of the pressure vessel, which is easier and more labor-saving, and can handle multiple pressure vessels at one time, with high work efficiency.

[0005] The purpose of the utility model is achieved in the following ways:

[0006] A pressure relief device for a pressure vessel comprises a briquetting machine working box, the upper surface of the working box is a cover plate, a side plate of the working box is an extrusion block, and a row of needles are evenly arranged on the inner surface of the extrusion block.

[0007] The inner surface of the extrusion block is evenly provided with multiple rows of needles.

[0008] A spring is sleeved on the surface of the needle, and one end of the spring is fixed on the extrusion block.

[0009] Compared with the prior art, the pressure relief device for pressure vessels disclosed in the utility model can be used for pressure relief by acupuncture in pressure vessels of different heights and diameters. The pressure relief device ensures pressure relief safety, reduces the number of operators, and improves the on-site working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0011] The pressure relief device of the pressure container disclosed by the utility model is an improvement made on the basis of a briquetting machine.

[0012] like Figure 1 As shown, a pressure relief device for a pressure vessel includes a briquetting machine working box 1, the upper surface of the working box 1 is a cover plate 5, a side plate of the working box 1 is an extrusion block 6, and a row of needles 20 are evenly arranged on the inner surface of the extrusion block 6. A row of needles can correspond to the pressure vessels one by one, or can be more than the number of pressure vessels.

[0013] The briquetting machine includes a working box 1, on which a support rod 2 is symmetrically fixedly connected to one side wall of the upper end surface of the working box 1, a cross bar 3 is fixedly connected between the two support rods 2, one end of a first hydraulic telescopic rod 4 is symmetrically rotatably connected to the cross bar 3, a cover plate 5 is rotatably connected to the inner surface of the working box 1 close to the support rod 2, the other end of the first hydraulic telescopic rod 4 is rotatably connected to the upper end surface of the cover plate 5, an extrusion block 6 is slidably connected between the front and rear end surfaces inside the working box 1, and a second hydraulic telescopic rod 7 is connected between the extrusion block 6 and the inner left end surface of the working box 1.

[0014] Furthermore, a plurality of lateral auxiliary limiting devices are provided between the extrusion block 6 and the inner seat end of the working box 1, so as to stabilize the state of the extrusion block 6 during operation. The lateral auxiliary limiting device comprises a limiting tube 8, which is fixedly connected to the inner left end surface of the working box 1, and a limiting rod 9 is slidably connected inside the limiting tube 8, and the end surface of the limiting rod 9 located outside the limiting tube 8 is fixedly connected to the extrusion block 6.

[0015] Furthermore, in order to prevent the cover plate from being deflected in the working box, a limiting groove 17 is provided on the inner surface of the side plate of the working box 1 opposite to the extrusion block 6 to limit the cover plate 5 .

[0016] The metal to be briquette is placed in the working box 1 of the original briquetting machine. The utility model places a pressure container 30 in the working box 1 of the briquetting machine, such as a self-spray paint bottle, a rust remover bottle, an air freshener, an antifreeze agent, etc. When working, the pressure container 30 to be depressurized is placed in the working box 1, and the nozzle of the pressure container 30 faces upwards, and is placed in a row vertically against the side plate opposite to the extrusion block. At this time, the first hydraulic telescopic rod 4 drives the cover plate 5 to rotate, covers the upper part of the working box 1, and continues to move downward until it contacts the pressure container 30, and the first hydraulic telescopic rod 4 stops moving. Then the second hydraulic telescopic rod 7 is controlled to work. When the second hydraulic telescopic rod 7 works, it drives the extrusion block 6 to slide along the inner surface of the working box 1. With the movement of the extrusion block 6, the puncture needle 20 moves from contacting the pressure container 30 to puncturing the pressure container 30, until the puncture needle 20 contacts the side plate opposite to the extrusion block 6, and the second hydraulic telescopic rod 7 stops moving. Then the first hydraulic telescopic rod 4 and the second hydraulic telescopic rod 7 move in the opposite direction, so that the cover plate 5 and the extrusion block 6 return to the initial position, and the pressure container after the pressure relief in the working box 1 is taken out. The first hydraulic telescopic rod 4 and the second hydraulic telescopic rod 7 can stop moving by setting sensors on the cover plate and the extrusion block, and combining with a controller to perform automatic control. This is a mature technology in this field and is not described in detail in the utility model.

[0017] There is a gap between the cover plate 5 and the inner surface of the working box, and the gas after the pressure vessel is depressurized escapes from the gap. A negative pressure collection device is set above the pressure vessel pressure relief device. The waste gas generated during the pressure relief process is absorbed by the workshop VOCs waste disposal system, and the gas is uniformly recovered and processed. The cover plate 5 and the inner surface of the working box can also form a closed space, and a gas escape port is set somewhere in the working box, and a pipeline is connected for collection and processing.

[0018] The first hydraulic telescopic rod 4 drives the cover plate 5 to move downward until it contacts the pressure vessel 30. Therefore, the pressure vessel pressure relief device can be applied to pressure vessels of different heights. The second hydraulic telescopic rod drives the extrusion block 6 and the needle 20 to move. When the needle length is greater than the pressure vessel diameter, the needle directly penetrates the pressure vessel twice and contacts the side plate of the working box opposite to the extrusion block 6. The second hydraulic telescopic rod 7 stops moving. When the needle length is less than the pressure vessel diameter, the extrusion block continues to squeeze the pressure vessel 30 and deflates the pressure vessel until the needle contacts the side plate of the working box opposite to the extrusion block 6. The second hydraulic telescopic rod 7 stops moving. Therefore, the pressure vessel pressure relief device can be applied to pressure vessels of different diameters.

[0019] Furthermore, multiple rows of needles 20 are evenly arranged on the inner surface of the extrusion block 6. The multiple rows of needles can puncture multiple holes in the side wall of the pressure container, thereby decompressing the pressure more quickly.

[0020] Furthermore, a spring (not shown) is sleeved on the surface of the puncture needle 20, and one end of the spring is fixed on the extrusion block 6. When the puncture needle 20 punctures the pressure container 30, the spring is compressed due to the continuous action of the second hydraulic telescopic rod. When the second hydraulic telescopic rod moves in the reverse direction, the resilience of the spring rebounds the pressure container 30, causing it to fall off the puncture needle 20, or partially fall off.

[0021] The above is only a preferred embodiment of the present invention. It should be pointed out that, for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A pressure relief device for a pressure vessel, comprising a briquetting machine working box, the upper surface of the working box (1) being a cover plate (5), and a side plate of the working box being an extrusion block (6), characterized in that: A support rod (2) is symmetrically fixedly connected to a side wall of the upper end surface of the working box (1), a cross rod (3) is fixedly connected between the two support rods (2), one end of a first hydraulic telescopic rod (4) is symmetrically rotatably connected to the cross rod (3), a cover plate (5) is rotatably connected to the inner surface of the working box (1) close to the support rod (2), the other end of the first hydraulic telescopic rod (4) is rotatably connected to the upper end surface of the cover plate (5), a limiting groove (17) is provided on the inner surface of the side plate of the working box (1) opposite to the extrusion block (6), a second hydraulic telescopic rod (7) is connected between the extrusion block (6) and the inner left end surface of the working box (1), and a row of needles (20) is evenly arranged on the inner surface of the extrusion block (6), and the number of the row of needles corresponds to one pressure vessel or is greater than the number of pressure vessels.

2. A pressure relief device for a pressure vessel according to claim 1, characterized in that: Multiple rows of needles (20) are evenly arranged on the inner surface of the extrusion block (6).

3. A pressure relief device for a pressure vessel according to claim 1 or 2, characterized in that: A spring is sleeved on the surface of the needle, and one end of the spring is fixed on the extrusion block (6).

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