Anti-explosion pressure release valve
By designing explosion-proof pressure relief valves and dry powder fire extinguishers in explosion-proof electrical boxes, air pressure powder spraying prevents explosion and explosion, solving the problem that existing explosion-proof electrical boxes are prone to explosion during explosion, and improving the safety of use.
Patent Information
- Application Number
- CN202421203788.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-30
AI Technical Summary
Existing explosion-proof electrical boxes are prone to explosion when explosion, resulting in continuous combustion of lines, increasing the risk of large-scale explosions that are not extinguished in time, and are not safe enough to use.
An explosion-proof pressure relief valve is designed, including a pressure relief valve body and a dry powder fire extinguisher. The pressure relief valve body uses a combination of a sleeve, a first piston, a spring and a pneumatic transmission assembly to spray powder the dry powder fire extinguisher with air pressure to prevent explosions. Explosion.
It effectively prevents explosion from ignition, and sprays dry powder inside the electrical box in a timely manner, improving the safety of use.
Smart Images
Figure CN222526971U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of explosion-proof equipment for electric boxes, in particular to an explosion-proof pressure relief valve. Background Art
[0002] The explosion-proof electrical box is a special power distribution equipment used in various high-risk places. Compared with the civil junction box, it is a power distribution box with explosion-proof function after various explosion-proof modifications. It is usually made of aluminum alloy die-casting or stainless steel welding. Its function is to work in an explosive gas environment. Even if there is a circuit spark in the box, or some explosive gas is infiltrated in the box, a small-scale deflagration occurs under the action of the spark. The box can withstand such a situation. It will not leak the fire to the environment because the box is not strong or broken, causing an explosion in the large environment. If the energy of the explosion exceeds the limit of the material of the explosion-proof junction box, the explosion-proof junction box cannot achieve the purpose of explosion-proof use. Therefore, it is necessary to install a pressure relief valve on the explosion-proof electrical box for pressure relief. For example, the explosion-proof junction box is disclosed in patent publication number CN214673835U. It includes a shell, an inflatable bag, a box, a Teflon coating layer, an explosion-proof plate, a temperature sensor, a pressure sensor, a pressure relief valve and a radiator. The pressure inside the box is quickly discharged through the pressure relief valve, thereby reducing the pressure inside the box.
[0003] However, when an explosion occurs in an electrical box, it often causes a deflagration. When a small-scale deflagration occurs, it is easy to cause the line to continue to burn. Since the staff needs time to extinguish the fire, it is easy to cause a large-scale explosion later due to untimely fire extinguishing. It is not safe to use. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and proposes an explosion-proof pressure relief valve to solve the problem of deflagration caused by explosion in an electrical box.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A kind of explosion-proof pressure relief valve comprises a pressure relief valve body and a dry powder fire extinguisher installed on an electrical box, the pressure relief valve body comprises a sleeve, a first piston is movably connected inside the sleeve, a small hole is formed through the surface of the sleeve, a middle hole is formed through the surface of the sleeve above the small hole, a large hole is formed through the surface of the sleeve above the middle hole, a spring is installed inside the sleeve, the first piston is installed at the end of the first piston, the dry powder fire extinguisher is installed in the electrical box, a pressure rod for pressing and spraying powder is arranged on the dry powder fire extinguisher, a pneumatic transmission assembly is arranged above the pressure rod, and the pneumatic transmission assembly is communicated with the middle hole.
[0007] Preferably, the pneumatic transmission assembly includes a cylinder, which is fixedly mounted on the electrical box, the cylinder is connected to the central hole through a connecting pipe, a second piston is movably connected inside the cylinder, a pressure block is installed at the bottom of the second piston, and the pressure block corresponds to the pressure rod.
[0008] Preferably, a threaded hole is formed at the top of the sleeve, an adjusting bolt is installed in the threaded hole, and the spring is installed at the bottom of the adjusting bolt.
[0009] To sum up, the beneficial effects of the utility model are as follows: the explosion-proof pressure relief valve provided by the utility model, the box door of the electrical box remains in a closed state, the pressure of the explosion impacts the pressure relief valve body, and the pressure relief valve body can be used to relieve pressure in the electrical box, and a slight pressure can lift the first piston for a distance, so that the slight pressure can be discharged from the small hole, allowing some small impact explosions to relieve pressure and exhaust, and when a larger pressure impacts the first piston, it is discharged from the middle hole, and the middle hole is connected to the pneumatic transmission component, and the air pressure can be used to press the pressure rod on the dry powder fire extinguisher, so that the dry powder fire extinguisher can spray powder, which can prevent the explosion from causing deflagration, solve the problem of deflagration caused by the explosion, and can timely spray dry powder on the inside of the electrical box, making it safer to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a basic structural schematic diagram of the utility model;
[0011] Figure 2 It is a schematic diagram of the structure of the pressure relief valve body of the utility model.
[0012] Figure numerals: 1. Pressure relief valve body; 101. Sleeve; 102. First piston; 103. Small hole; 104. Middle hole; 105. Large hole; 106. Spring; 2. Dry powder fire extinguisher; 201. Pressure rod; 3. Pneumatic transmission assembly; 301. Cylinder; 302. Second piston; 303. Pressure block; 4. Threaded hole; 5. Adjusting bolt. DETAILED DESCRIPTION
[0013] 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.
[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0015] like Figure 1 - Figure 2 As shown, the utility model provides an explosion-proof pressure relief valve, comprising a pressure relief valve body 1 and a dry powder fire extinguisher 2 installed on an electrical box, the pressure relief valve body 1 comprising a sleeve 101, a first piston 102 movably connected inside the sleeve 101, a small hole 103 is formed through the surface of the sleeve 101, a middle hole 104 is formed through the surface of the sleeve 101 and located above the small hole 103, a large hole 105 is formed through the surface of the sleeve 101 and located above the middle hole 104, a spring 106 is installed inside the sleeve 101, the first piston 102 is installed at the end of the first piston 102, the dry powder fire extinguisher 2 is installed in the electrical box, a pressure rod 201 for pressing and spraying powder is arranged on the dry powder fire extinguisher 2, a pneumatic transmission assembly 3 is arranged above the pressure rod 201, and the pneumatic transmission assembly 3 is communicated with the middle hole 104.
[0016] The pressure relief valve body 1 can be used to relieve pressure in the electrical box. When the pressure in the electrical box impacts the pressure relief valve body 1, the first piston 102 can be pushed. When the pressure is relieved, the slight pressure can lift the first piston 102 for a distance, so the slight pressure can be discharged from the small hole 103. When a greater pressure impacts the first piston 102, it is discharged from the middle hole 104. The middle hole 104 is connected to the pneumatic transmission component 3. The air pressure can be used to press the pressure rod 201 on the dry powder fire extinguisher 2, so that the dry powder fire extinguisher 2 can spray powder, which can prevent explosion and deflagration. When the pressure is greater, the air pressure is discharged from the large hole 105.
[0017] The pneumatic transmission assembly 3 includes a cylinder 301, which is fixedly mounted on the electrical box, and is communicated with the middle hole 104 through a connecting pipe. A second piston 302 is movably connected inside the cylinder 301, and a pressure block 303 is mounted at the bottom of the second piston 302, and the pressure block 303 is matched with the pressure rod 201. The gas released from the pressure relief valve body 1 can be discharged into the cylinder 301 from the middle hole 104, and can push the second piston 302, so that the pressure block 303 can press the pressure rod 201, so that the dry powder fire extinguisher 2 can spray powder to extinguish the fire.
[0018] The top of the sleeve 101 is provided with a threaded hole 4, in which an adjusting bolt 5 is installed, and a spring 106 is installed at the bottom of the adjusting bolt 5. The adjusting bolt 5 can threadably move with the threaded hole 4, and can adjust the pressure relief pressure of the first piston 102.
[0019] Working principle: When in use, the door of the electrical box remains closed, and the pressure of the explosion impacts the pressure relief valve body 1. The pressure relief valve body 1 can be used to relieve the pressure in the electrical box. When the pressure in the electrical box impacts the pressure relief valve body 1, it can push the first piston 102. When the pressure is relieved, the slight pressure can lift the first piston 102 for a distance, so the slight pressure can be discharged from the small hole 103. When a greater pressure impacts the first piston 102, it is discharged from the middle hole 104. The middle hole 104 is connected to the pneumatic transmission component 3. The gas leaked from the pressure relief valve body 1 can be discharged from the middle hole 104 into the cylinder 301, which can push the second piston 302, so that the pressure block 303 can press the pressure rod 201, so that the dry powder fire extinguisher 2 can spray powder to extinguish the fire, and can prevent the explosion from causing deflagration. When the pressure is higher, the air pressure is discharged from the large hole 105.
[0020] 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. An explosion-proof pressure relief valve, comprising a pressure relief valve body (1) mounted on an electrical box and a dry powder fire extinguisher (2), characterized in that: The pressure relief valve body (1) comprises a sleeve (101), a first piston (102) is movably connected inside the sleeve (101), a small hole (103) is formed through the surface of the sleeve (101), a middle hole (104) is formed through the surface of the sleeve (101) at a position above the small hole (103), a large hole (105) is formed through the surface of the sleeve (101) at a position above the middle hole (104), a spring (106) is installed inside the sleeve (101), the first piston (102) is installed at the end of the first piston (102), the dry powder fire extinguisher (2) is installed in the electrical box, a pressure rod (201) for pressing and spraying powder is provided on the dry powder fire extinguisher (2), a pneumatic transmission assembly (3) is provided above the pressure rod (201), and the pneumatic transmission assembly (3) is communicated with the middle hole (104).
2. An explosion-proof pressure relief valve according to claim 1, characterized in that: The pneumatic transmission assembly (3) comprises a cylinder (301), the cylinder (301) being fixedly mounted on the electrical box, the cylinder (301) being connected to the middle hole (104) via a connecting pipe, a second piston (302) being movably connected inside the cylinder (301), a pressure block (303) being mounted at the bottom of the second piston (302), and the pressure block (303) correspondingly matching with the pressure rod (201).
3. The explosion-proof pressure relief valve according to claim 1, characterized in that: A threaded hole (4) is provided at the top of the sleeve (101), an adjusting bolt (5) is installed in the threaded hole (4), and the spring (106) is installed at the bottom of the adjusting bolt (5).