High-pressure resistant safety small tank

Abstract

This utility model discloses a high-pressure resistant safety small tank, including a tank body with a high-pressure resistant valve. The high-pressure resistant valve includes: a valve body with an air inlet channel communicating with the tank body, the air inlet channel being divided into an exhaust channel and a pressure relief channel; a valve stem with a threaded connection to the exhaust channel for opening and closing the channel; a pressure relief channel with a conical sealing port at one end and pressure relief holes with stepped diameters from the inside to the outside on its side wall; a piston valve head including a piston head that slides and seals with the pressure relief channel, a piston rod on the piston head, and a conical sealing head at the end of the piston head; and a pressure chamber with a pressure spring and a retaining head that abuts against the side wall of the pressure chamber to form a support and guide. The piston rod extends through the pressure relief channel into the pressure chamber and connects to the retaining head. The spring and the gas in the pressure chamber and the outer part of the pressure relief channel exert a rebound force on the retaining head, and the diameter of the pressure relief hole is adjusted from small to large when the piston head moves outward.

Description

Technical Field

[0001] This utility model relates to gas cylinders, and more particularly to small, high-pressure resistant safety cylinders. Background Technology

[0002] Steel canisters are widely used in daily life after being made by stretching, forming, narrowing, welding, and installing valves on steel sheets to hold high-pressure compressed gases.

[0003] Since these types of tanks are generally used to store high-pressure compressed gases, under special circumstances, such as a rapid increase in temperature, the pressure inside the tank can increase dramatically. Currently, this problem is generally addressed by installing pressure relief valves to prevent excessive pressure and potential explosions. However, existing pressure relief valves typically use the elasticity of a spring in conjunction with a floating valve core to achieve pressure relief. This structure has the following drawbacks: due to the characteristics of springs, they are greatly affected by thermal expansion and contraction, and their elasticity weakens at high temperatures, while the increase in pressure inside the tank is generally due to an increase in temperature; furthermore, they can bounce under stress and experience fatigue and creep under excessive pressure; finally, the spring pressure is also finite, and in extreme situations, the pressure relief valve may fail, leading to excessive leakage of compressed gas and increasing the risk. Utility Model Content

[0004] In view of the problems mentioned in the background art, the technical problem to be solved by this utility model is to provide a high-pressure resistant and safe small tank.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A high-pressure resistant safety tank, including a tank body, on which a high-pressure resistant valve is installed. The high-pressure resistant valve includes: The valve body has an air intake channel that communicates with the tank, and the air intake channel is divided into two to form an exhaust channel and a pressure relief channel. The valve stem has a threaded connection to the exhaust passage and is used to open and close the passage; a knob is located on its top. The pressure relief channel has a conical sealing opening at one end and pressure relief holes with stepped diameters from the inside to the outside on its side wall. A piston valve head includes a piston head that slides and seals with a pressure relief passage, a piston rod disposed on the piston head, and a conical sealing head disposed at the end of the piston head; The pressure chamber contains a pressure spring and a retaining head that abuts against the side wall of the pressure chamber to form a support and guide. The piston rod extends through the pressure relief channel into the pressure chamber and is connected to the retaining head. The spring and the gas in the outer part of the pressure chamber and the pressure relief channel work together to apply a rebound force to the retaining head. When the piston head moves outward, the diameter of the pressure relief hole can be adjusted from small to large.

[0006] Preferably, the exhaust passage includes a vertical portion and a horizontal portion, with the valve stem located in the vertical portion.

[0007] Preferably, the exhaust passage and the pressure relief passage are staggered vertically, so that the pressure relief passage automatically releases pressure when the pressure exceeds the set limit.

[0008] Preferably, the end of the pressure chamber is provided with a detachable sealing cap.

[0009] Preferably, the sealing head abuts against the sealing port to form a seal while all pressure relief holes are blocked, and the thickness of the piston head in the axial direction is greater than the span distance of the pressure relief hole in that direction, so that the piston head and the outer part of the pressure relief chamber wall always remain sealed.

[0010] As a preferred option, the handle forms a protective layer around the high-pressure resistant valve.

[0011] Preferably, the handle is welded to the tank body or the tank body has ear plates welded on it, with the handle pressed firmly against the tank body by the ear plates.

[0012] Compared with the prior art, the present invention has the following advantages: In this application, when the pressure inside the tank increases and exceeds the preset value, the piston valve head is pushed outward by the gas, and at the same time the pressure relief hole is gradually opened. During this process, the opening at the sealing head is larger than the opening of the pressure relief hole to increase the mutual inductance adjustment effect between the piston head and the internal pressure. During this process, the spring and compressed air jointly apply a rebound force to the piston valve head, reducing the degree of spring compression and avoiding over-compression. During this process, by maintaining the support of the head and piston head, vibration caused by the spring can be avoided, and the safety of the entire pressure relief process is effectively guaranteed. Attached Figure Description

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0014] Figure 1 This is a perspective view of the present application; Figure 2 This is a side view of this application; Figure 3 This is a cross-sectional view of this application; Figure 4 for Figure 3 Enlarged view of point A in the middle; In the diagram: 10, tank body; 20, high-pressure resistant valve; 200, knob; 201, valve body; 2011, air inlet passage; 2012, exhaust passage; 203, pressure relief hole; 204, valve stem; 2050, pressure relief passage; 2051, piston head; 2052, sealing head; 2053, piston rod; 2054, pressure chamber; 2055, spring; 2056, cover; 30, handle. Detailed Implementation

[0015] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0016] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures. Example

[0017] This embodiment mainly describes the title of the high-pressure resistant safety small tank, as follows: like Figure 1-4 As shown, the high-pressure resistant safety tank includes a tank body 10, and a high-pressure resistant valve 20 is provided on the tank body 10. The high-pressure resistant valve 20 includes: The valve body 201 has an air intake channel 2011 that communicates with the tank body 10, and the air intake channel 2011 is divided into two to form an exhaust channel 2012 and a pressure relief channel 2050. The valve stem 204 is threaded into the exhaust passage 2012 and used to open and close the passage, and has a knob 200 on its top. The pressure relief channel 2050 has a conical sealing port at one end and a pressure relief hole 203 with a stepped diameter from the inside to the outside on its side wall. The piston valve head includes a piston head 2051 that slides and seals with the pressure relief passage 2050, a piston rod 2053 disposed on the piston head 2051, and a conical sealing head 2052 disposed at the end of the piston head 2051. The pressure chamber 2054 contains a pressure spring 2055 and a retaining head that abuts against the side wall of the pressure chamber 2054 to form a support and guide. The piston rod 2053 extends through the pressure relief channel 2050 into the pressure chamber 2054 and is connected to the retaining head. The spring 2055 and the gas in the outer part of the pressure chamber 2054 and the pressure relief channel 2050 together exert a rebound force on the retaining head. When the piston head 2051 moves outward, the diameter of the pressure relief hole 203 is adjusted from small to large. In this scheme, when the pressure inside the tank increases and exceeds the preset value, the piston valve head is pushed outward by the gas, and at the same time, the pressure relief hole 203 is gradually opened. During this process, the opening at the sealing head 2052 is larger than the opening of the pressure relief hole 203 to increase the mutual inductance adjustment effect between the piston head 2051 and the internal pressure. During this process, the spring 2055 and the compressed air together apply a rebound force to the piston valve head, reducing the degree of compression of the spring 2055 and avoiding over-compression. During this process, by maintaining the support of the head and the piston head 2051, the shaking caused by the spring 2055 can be avoided, and the safety of the entire pressure relief process is effectively guaranteed.

[0018] Preferably, the exhaust passage 2012 includes a vertical portion and a horizontal portion, with the valve stem 204 disposed in the vertical portion.

[0019] Preferably, the exhaust passage 2012 and the pressure relief passage 2050 are staggered vertically, so that the pressure relief passage 2050 automatically relieves pressure when the pressure exceeds the set limit.

[0020] Preferably, the end of the pressure chamber 2054 is provided with a detachable sealing cap 2056. This design provides a cap 2056 at the end of the pressure chamber 2054, making the installation of the retaining head and spring 2055 more convenient. The retaining head and piston rod 2053 can be configured with a threaded connection.

[0021] Preferably, while the sealing head 2052 abuts against the sealing opening to form a seal, all pressure relief holes 203 are blocked, and the thickness of the piston head 2051 in the axial direction is greater than the span distance of the pressure relief holes 203 in that direction, so that the piston head 2051 and the outer part of the pressure relief chamber wall always remain sealed.

[0022] As a preferred option, the handle 30 forms a protective layer around the high-pressure resistant valve.

[0023] Preferably, the handle 30 is welded to the tank body 10 or the tank body 10 is welded with an ear plate, and the handle 30 is pressed tightly onto the tank body 10 by the ear plate.

[0024] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A high pressure resistant safety type canister comprising a can body, characterized in that, The tank is equipped with high-pressure resistant valves, which include: The valve body has an air intake channel that communicates with the tank, and the air intake channel is divided into two to form an exhaust channel and a pressure relief channel. The valve stem has a threaded connection to the exhaust passage and is used to open and close the passage; a knob is located on its top. The pressure relief channel has a conical sealing opening at one end and pressure relief holes with stepped diameters from the inside to the outside on its side wall. A piston valve head includes a piston head that slides and seals with a pressure relief passage, a piston rod disposed on the piston head, and a conical sealing head disposed at the end of the piston head; The pressure chamber contains a pressure spring and a retaining head that abuts against the side wall of the pressure chamber to form a support and guide. The piston rod extends through the pressure relief channel into the pressure chamber and is connected to the retaining head. The spring and the gas in the outer part of the pressure chamber and the pressure relief channel work together to apply a rebound force to the retaining head. When the piston head moves outward, the diameter of the pressure relief hole can be adjusted from small to large.

2. The high pressure resistant safety type can according to claim 1, wherein, The exhaust passage includes a vertical section and a horizontal section, with the valve stem located in the vertical section.

3. The high pressure resistant safety type can according to claim 1, wherein, The exhaust passage and the pressure relief passage are staggered vertically, so that the pressure relief passage automatically releases pressure when the pressure exceeds the set limit.

4. The high pressure resistant safety type can according to claim 1, wherein, The end of the pressure chamber is detachably equipped with a sealing cap.

5. The high-pressure resistant safety tank according to claim 1, characterized in that, As the sealing head abuts against the sealing opening to form a seal, all pressure relief holes are blocked, and the axial thickness of the piston head is greater than the span distance of the pressure relief hole in that direction, so that the piston head and the outer part of the pressure relief chamber wall always remain sealed.

6. The high-pressure resistant safety tank according to claim 1, characterized in that, A ring-shaped handle is provided on each side of the tank, and the handles form a protective barrier around the high-pressure valve.

7. The high-pressure resistant safety small tank according to claim 6, characterized in that, The handle is welded to the tank body or the tank body has ear plates welded on it, and the handle is pressed tightly against the tank body by the ear plates.

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