Pressure vacuum valve for exhaust pipe opening of gasoline tank of gasoline station
By designing a pressure vacuum valve for the exhaust pipe port of gasoline tanks in the gas station, the heat-sensitive component is heat-breaking and driving the fire extinguishing valve assembly to achieve automatic fire extinguishing, which solves the problem that the pressure vacuum valve may catch fire in extreme cases and lacks active fire extinguishing in the prior art. Functional problems significantly reduce fire risk.
Patent Information
- Application Number
- CN202411814453.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-02-07
AI Technical Summary
The existing pressure vacuum valves used for the exhaust pipe opening of gasoline tanks in gas stations may catch fire in extreme cases and lack active fire extinguishing functions, resulting in a high fire risk.
A pressure vacuum valve including a main valve body, a positive pressure valve, a fire extinguishing valve assembly and a thermally sensitive assembly are designed. When a fire occurs, the heat-sensitive component breaks due to heat and causes the valve body of the fire-extinguishing valve to move, seal the third channel, and cut off the gas path of combustible materials to achieve automatic fire extinguishing.
Automatic fire extinguishing through pure mechanical structures, reducing fire hazards, preventing the expansion of fire hazards, avoiding major economic losses and casualties, and improving the safety of gas stations.
Smart Images
Figure CN119393560A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of gas station equipment, in particular to a pressure vacuum valve used for an exhaust pipe port of a gasoline tank in a gas station. Background Art
[0002] The ventilation pipe of the buried gasoline tank at the gas station needs to be installed with a pressure vacuum valve for the exhaust pipe of the gasoline tank at the gas station, which plays a role in environmental protection and emission reduction, blocking rain, dust, mosquitoes, and fire and explosion prevention. Affected by the use environment, such as lightning, in extreme cases, the pressure vacuum valve used for the exhaust pipe of the gasoline tank at the gas station may catch fire, which will have a serious negative impact on the safety of the gas station and the surrounding area. Once a disaster occurs, the pressure vacuum valve used for the exhaust pipe of the gasoline tank at the gas station will continue to burn as the oil and gas are discharged. The existing pressure vacuum valve used for the exhaust pipe of the gasoline tank at the gas station does not have an active fire extinguishing function. It is necessary to wait for the fire conditions to disappear naturally or human intervention before the fire can be extinguished, so the risk is relatively high. Summary of the invention
[0003] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art.
[0004] In order to solve the above technical problems, the present invention provides a pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station, comprising: The main valve body is provided with a first channel and a second channel which are interconnected, the second channel is arranged at the top of the first channel, the diameter of the second channel is larger than the diameter of the first channel; the connecting position of the second channel and the first channel is a communicating hole; A positive pressure valve is disposed against the top of the communicating hole; the positive pressure valve moves up and down in the second channel, and there is a gap between the positive pressure valve and the inner wall of the main valve body; The fire extinguishing valve assembly has a use state and a fire extinguishing state; the fire extinguishing valve assembly includes a fire extinguishing valve seat, a fire extinguishing valve stem and a fire extinguishing valve body; the fire extinguishing valve seat is connected to the top of the main valve body; a third channel connected to the outside is provided in the fire extinguishing valve seat; the fire extinguishing valve stem is provided in the third channel, and the fire extinguishing valve stem is connected to the fire extinguishing valve seat; the fire extinguishing valve body is slidably connected to the top of the fire extinguishing valve stem; A top cover connected above the fire extinguisher valve assembly; A thermal sensitive component connected between the top cover and the fire extinguisher valve body; Wherein: in the use state, the third channel is connected with the outside; in the fire extinguishing state, the thermal component is burned off, and the fire extinguishing valve body moves axially, so that the third channel is not connected with the outside.
[0005] In one embodiment of the present invention, a fire extinguisher valve stem comprises a valve stem body and a valve stem; the valve stem body is connected to a valve seat of the fire extinguisher valve; the valve stem is connected to the center of the valve stem body through a plurality of connecting members distributed at intervals along the axial direction; a mounting hole is provided in the valve stem; a guide rod is provided in the fire extinguisher valve body, the guide rod is slidably connected to the mounting hole, and an elastic member is connected between the fire extinguisher valve body and the fire extinguisher valve stem.
[0006] In one embodiment of the present invention, the guide rod includes a rod portion and a head portion connected to the top end of the rod portion, and the head portion is connected to the upper surface of the fire extinguishing valve body; the rod portion passes through the fire extinguishing valve body and is slidably connected to the fire extinguishing valve stem.
[0007] In one embodiment of the present invention, a clamping groove is provided on the inner wall of the fire extinguishing valve seat; in the fire extinguishing state, the outer side wall of the fire extinguishing valve body is sealed and connected to the clamping groove.
[0008] In one embodiment of the present invention, the thermal sensitive component is a fusible head, which includes a fusible head body and a fusible head support seat connected to the top of the fusible head body, the bottom of the fusible head body is connected to the fire extinguishing valve body, and the fusible head support seat is connected to the top cover.
[0009] In one embodiment of the present invention, the main valve body includes a first valve body and a second valve body connected to the top of the first valve body, the first passage is provided in the first valve body, and the second passage is provided in the second valve body.
[0010] In one embodiment of the present invention, the present application further comprises a lower fire-blocking net, which is connected between the main valve body and the flange, and the bottom of the lower fire-blocking net extends into the flange.
[0011] In one embodiment of the present invention, the present application also includes a guide seat connected to the main valve body; the positive pressure valve sleeve is arranged in the guide seat, and the positive pressure valve rises and falls in the guide seat; at least one opening is opened on the side wall of the guide seat.
[0012] In one embodiment of the present invention, the present application further comprises an upper fire-blocking net; the upper fire-blocking net is vertically sleeved between the main valve body and the positive pressure valve.
[0013] In one embodiment of the present invention, the present application further comprises a flange, and the flange is sealingly connected to the bottom of the main valve body.
[0014] The above technical solution of the present invention has the following advantages compared with the prior art: The pressure vacuum valve for the exhaust pipe of the gasoline tank at a gas station described in the present invention moves the valve body of the fire extinguishing valve through the thermal rupture of the heat-sensitive component, thereby sealing with the valve seat of the fire extinguishing valve, closing the gas path connecting the third channel with the outside world, that is, cutting off the combustibles to extinguish the fire. This embodiment adopts a purely mechanical structure to achieve automatic fire extinguishing, reduce fire hazards, prevent the expansion of fire hazards, avoid major economic losses and casualties; improve the safety of gas stations, avoid the adverse public opinion impact of fires, enhance the safety credibility of enterprises, and provide guarantees for the normal operation of gas stations. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein: Figure 1 It is a three-dimensional schematic diagram of a pressure vacuum valve used for an exhaust pipe outlet of a gasoline tank at a gas station in a preferred embodiment of the present invention; Figure 2 yes Figure 1 An internal schematic diagram of a pressure vacuum valve for a gasoline tank exhaust pipe outlet at a gas station; Figure 3 yes Figure 1 A front view of a pressure vacuum valve for a gasoline tank exhaust pipe outlet at a gas station; Figure 4 yes Figure 3 A cross-sectional view of Description of the reference numerals in the specification: 100, main valve body; 110, first channel; 120, second channel; 130, connecting hole; 140, first valve body; 150, second valve body; 200, positive pressure valve; 210, positive pressure valve seat; 300, fire extinguisher valve assembly; 310, fire extinguisher valve seat; 311, third channel; 312, slot; 320, fire extinguisher valve stem; 321, valve stem body; 322, valve stem; 323, connector; 324, mounting hole; 325, elastic member; 330, fire extinguisher valve body; 331, guide rod; 332, sealing groove; 400, top cover; 410, top cover support column; 500, thermal sensitive component; 510, fusible head body; 520, fusible head support seat; 600, flange; 700, lower fire-blocking net; 800, guide seat; 810, opening; 900. Install the fire-blocking net. DETAILED DESCRIPTION
[0016] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.
[0017] Reference Figure 1~Figure 4 As shown, an embodiment of the present invention provides a pressure vacuum valve for an exhaust pipe outlet of a gasoline tank at a gas station, comprising: The main valve body 100 is provided with a first channel 110 and a second channel 120 which are connected to each other. The second channel 120 is provided at the top of the first channel 110. The diameter of the second channel 120 is larger than the diameter of the first channel 110. The connecting position of the second channel 120 and the first channel 110 is a connecting hole 130. The positive pressure valve 200 is disposed against the top of the communication hole 130; the positive pressure valve 200 moves up and down in the second channel 120, and there is a gap between the positive pressure valve 200 and the inner wall of the main valve body 100; The fire extinguishing valve assembly 300 has a use state and a fire extinguishing state; the fire extinguishing valve assembly 300 includes a fire extinguishing valve seat 310, a fire extinguishing valve stem 320 and a fire extinguishing valve body 330; the fire extinguishing valve seat 310 is connected to the top of the main valve body 100; in some embodiments, the fire extinguishing valve seat 310 and the main valve body 100 are threadedly connected. The fire extinguishing valve seat 310 is provided with a third channel 311 connected to the outside; the fire extinguishing valve stem 320 is provided in the third channel 311, and the fire extinguishing valve stem 320 is connected to the fire extinguishing valve seat 310; the fire extinguishing valve body 330 is slidably connected to the top of the fire extinguishing valve stem 320; The top cover 400 is connected to the top of the fire extinguishing valve assembly 300; in some embodiments, the top cover 400 is connected to the top of the fire extinguishing valve seat 310 by bolts. In some possible embodiments, the present application further includes a plurality of top cover support columns 410 arranged at intervals along the circumferential direction. The top cover 400 is fixed to the top of the fire extinguishing valve seat 310 by a plurality of top cover support columns 410. The bottom end of the top cover support column 410 is connected to the fire extinguishing valve seat 310 by bolts. The top end of the top cover support column 410 is threadedly connected to the top cover 400.
[0018] The thermal component 500 is connected between the top cover 400 and the fire extinguishing valve body 330. When in use, the thermal component 500 presses down the fire extinguishing valve body 330 to make the third channel 311 communicate with the outside world smoothly.
[0019] Wherein: in the use state, the third channel 311 is connected with the outside; in the fire extinguishing state, the thermal component 500 is burned off, and the fire extinguishing valve body 330 moves axially, so that the third channel 311 is not connected with the outside.
[0020] The device is installed at the top of the exhaust pipe of the gasoline tank at the gas station. When the gas pressure of the oil tank rises to the valve opening pressure specified by the national standard, the positive pressure valve 200 moves upward to open the valve under the action of the gas pressure, so that the first channel 110 and the second channel 120 are connected.
[0021] In the use state: the fire extinguishing valve body 330 is supported by the thermal component 500, and the fire extinguishing valve body 330 is separated from the fire extinguishing valve seat 310, so as to keep the gas path connecting the third channel 311 with the outside world unobstructed. At this time, the oil and gas discharged through the positive pressure valve 200 can be normally discharged to the outside world through the first channel 110, the second channel 120 and the third channel 311; In the fire extinguishing state, if the exhaust pipe is affected by lightning during the discharge of oil and gas, discharge sparks may be generated, which may ignite the discharged oil and gas, resulting in a fire. Once a fire occurs, the heat generated by the flame will contact the thermistor component 500, causing the thermistor component 500 to melt and disconnect in a short time, thereby causing the fire extinguishing valve body 330 to lose its supporting function. In this way, the fire extinguishing valve body 330 moves upward rapidly until the outer wall of the fire extinguishing valve body 330 is tightly combined with the inner wall of the fire extinguishing valve seat 310. Finally, the connection between the third channel 311 and the outside world is cut off, the oil and gas discharge stops, and the flame is extinguished, thereby achieving the fire extinguishing function.
[0022] It can be seen that in this embodiment, the fire extinguishing valve body 330 moves and seals with the fire extinguishing valve seat 310 by thermally breaking the thermal component 500, closing the gas path connecting the third channel 311 with the outside world, that is, cutting off the combustibles to extinguish the fire. This embodiment uses a purely mechanical structure to achieve automatic fire extinguishing, reduce fire hazards, prevent the expansion of fire hazards, avoid major economic losses and casualties; improve the safety of gas stations, avoid the adverse impact of fire on public opinion, enhance the safety credibility of enterprises, and provide guarantees for the normal operation of gas stations.
[0023] Further, the fire extinguisher valve stem 320 includes a valve stem body 321 and a valve stem 322; the valve stem body 321 is connected to the fire extinguisher valve seat 310; in some embodiments, the valve stem body 321 is a circular ring structure, and the valve stem body 321 is threadedly connected to the fire extinguisher valve seat 310. The valve stem 322 is connected to the center of the valve stem body 321 through a plurality of connectors 323 distributed along the axial interval; a mounting hole 324 is provided in the valve stem 322; a guide rod 331 is provided in the fire extinguisher valve body 330, and the guide rod 331 is slidably connected to the mounting hole 324, and an elastic member 325 (for example, a spring) is connected between the fire extinguisher valve body 330 and the fire extinguisher valve stem 320. In some embodiments, the outer wall of the valve stem 322 is provided with a step, the bottom end of the elastic member 325 is connected to the step, and the top end of the elastic member 325 is connected to or in contact with the bottom of the fire extinguisher valve body 330. In the use state, the elastic member 325 is in a compressed state.
[0024] Specifically, in this embodiment, the valve stem body 321 is connected to the fire extinguishing valve seat 310, and then the hollowing between the multiple connecting members 323 realizes the communication between the third channel 311 and the second channel 120. It can be seen that this embodiment has a simple structure and a stable and reliable connection. In addition, the guide rod 331 cooperates with the mounting hole 324 to guide the movement of the fire extinguishing valve body 330, thereby ensuring that the fire extinguishing valve body 330 can be sealed with the fire extinguishing valve seat 310 after moving upward.
[0025] Furthermore, the guide rod 331 includes a rod portion and a head portion connected to the top end of the rod portion, and the head portion is connected to the upper surface of the fire extinguishing valve body 330 ; the rod portion passes through the fire extinguishing valve body 330 and is slidably connected to the fire extinguishing valve stem 320 .
[0026] Furthermore, the inner wall of the fire extinguishing valve seat 310 is provided with a slot 312; in the fire extinguishing state, the outer side wall of the fire extinguishing valve body 330 is sealed and connected to the slot 312 through a sealing ring. In some embodiments, a sealing slot 332 is provided on the outer side wall of the fire extinguishing valve body 330, and a sealing ring is installed in the sealing slot 332. Specifically, in this embodiment, after the fire extinguishing valve body 330 rises, it is clamped in the slot 312 and sealed, thereby blocking the third channel 311 and disconnecting the third channel 311 from the outside, so as to extinguish the fire.
[0027] Further, the thermal component 500 is a fusible head, which includes a fusible head body 510 and a fusible head support seat 520 connected to the top of the fusible head body 510, the bottom of the fusible head body 510 is connected to the guide rod 331 of the fire extinguishing valve body 330, and the fusible head support seat 520 is connected to the top cover 400. In some embodiments, the fusible head support seat 520 is threadedly connected to the top cover 400.
[0028] Specifically, in the use state, the bottom of the fusible head body 510 is against the fire extinguishing valve body 330, and the top of the fusible head body 510 is against the lower surface of the fusible head support seat 520. The fusible head body 510 is equivalent to being stuck between the fire extinguishing valve body 330 and the fusible head support seat 520, so that the gas path of the third channel 311 is unblocked. When encountering a fire, the fusible head body 510 will be hot-melted in a short time, causing the fire extinguishing valve body 330 to lose its supporting function, thereby moving upward and disconnecting the third channel 311 from the outside. This embodiment has a simple structure and low cost.
[0029] Further, the main valve body 100 includes a first valve body 140 and a second valve body 150 connected to the top of the first valve body 140. In some embodiments, the first valve body 140 and the second valve body 150 are connected by bolts. The first channel 110 is provided in the first valve body 140, and the second channel 120 is provided in the second valve body 150. In some embodiments, the present application also includes a positive pressure valve seat 210, and the positive pressure valve seat 210 is a circular ring structure. The bottom of the second valve body 150 is provided with a mounting groove, and the positive pressure valve seat 210 is arranged in the mounting groove. The positive pressure valve 200 is placed on the top of the positive pressure valve seat 210. In some embodiments, the positive pressure valve seat 210 can be connected to the second valve body 150 by turning or casting.
[0030] Specifically, in this embodiment, the main valve body 100 is a split structure, which facilitates the installation of other components inside it.
[0031] Furthermore, the present application further comprises a flange 600, which is sealed and connected to the bottom of the main valve body 100. Specifically, the flange 600 is threadedly connected to the bottom of the main valve body 100 and then sealed by a sealing ring. The flange 600 is provided in this embodiment, so that the present application can be easily installed at the top of the exhaust pipe of the gasoline tank at the gas station.
[0032] Further, the present application also includes a lower fire-blocking net 700, which is connected between the main valve body 100 and the flange 600, and the bottom of the lower fire-blocking net 700 extends into the flange 600. In some embodiments, the lower fire-blocking net 700 includes a fire-blocking net body and a flange connected to the top of the fire-blocking net body. The flange is stuck between the upper end surface of the flange 600 and the lower end surface of the main valve body 100, and the fire-blocking net body extends into the inner hole of the flange 600. Specifically, the lower fire-blocking net 700 provided in this embodiment plays a role of heat insulation.
[0033] Furthermore, the present application also includes a guide seat 800 connected to the main valve body 100; the positive pressure valve 200 is sleeved in the guide seat 800, and the positive pressure valve 200 rises and falls in the guide seat 800; at least one opening 810 is provided on the side wall of the guide seat 800. The opening 810 increases the area of the first channel 110 and the second channel 120 that are interconnected. In some embodiments, a groove is formed at the position where the first valve body 140 and the second valve body 150 are connected, and the bottom of the guide seat 800 is stuck in the groove. In this way, when the first valve body 140 and the second valve body 150 are connected, the connection and fixation of the guide seat 800 and the main valve body 100 can be achieved, and the assembly is simple and convenient. Specifically, the guide seat 800 in this embodiment improves the guiding effect of the positive pressure valve 200 when it rises and falls.
[0034] Furthermore, the present application also includes an upper fire-blocking net 900; the upper fire-blocking net 900 is vertically sleeved between the main valve body 100 and the positive pressure valve 200. In some embodiments, the upper fire-blocking net 900 is fixedly connected to the main valve body 100. When the present application includes a guide seat 800 and a positive pressure valve seat 210, the upper fire-blocking net 900 is sleeved on the outside of the guide seat 800, and the upper fire-blocking net 900 is against the top of the positive pressure valve seat 210. Specifically, the upper fire-blocking net 900 provided in this embodiment plays the role of filtering, isolating external insects and impurities, and dispersing heat.
[0035] This application is a pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station, which can realize the automatic fire extinguishing function. Once a fire occurs, it automatically starts the fire extinguishing and automatically implements the fire extinguishing action to stop the fire disaster. It can be seen that this application has the function of automatically detecting fire and can automatically extinguish the fire within a few seconds of the fire, preventing the fire impact of the exhaust pipe from expanding and minimizing the possibility of adverse public opinion impact.
[0036] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.
Claims
1. A pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station, characterized in that: include: The main valve body is provided with a first channel and a second channel which are interconnected, wherein the second channel is provided at the top of the first channel, and the diameter of the second channel is larger than the diameter of the first channel; and a connecting hole is provided at the connecting position of the second channel and the first channel; A positive pressure valve is disposed against the top of the communicating hole; the positive pressure valve moves up and down in the second channel, and there is a gap between the positive pressure valve and the inner wall of the main valve body; A fire extinguishing valve assembly has a use state and a fire extinguishing state; the fire extinguishing valve assembly comprises a fire extinguishing valve seat, a fire extinguishing valve stem and a fire extinguishing valve body; the fire extinguishing valve seat is connected to the top of the main valve body; a third channel connected to the second channel is provided in the fire extinguishing valve seat; the fire extinguishing valve stem is provided in the third channel, and the fire extinguishing valve stem is connected to the fire extinguishing valve seat; the fire extinguishing valve body is slidably connected to the top of the fire extinguishing valve stem; A top cover connected above the fire extinguishing valve assembly; A thermal sensitive component connected between the top cover and the fire extinguishing valve body; Wherein: in the use state, the third channel is connected with the outside world; in the fire extinguishing state, the thermal sensitive component is burned out, and the fire extinguishing valve body moves axially, so that the connection between the third channel and the outside world is cut off.
2. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 1, characterized in that: The fire extinguishing valve stem comprises a stem body and a valve stem; the stem body is connected to the fire extinguishing valve seat; the valve stem is connected to the center of the stem body through a plurality of connecting members distributed at intervals along the axial direction; a mounting hole is provided in the valve stem; a guide rod is provided in the fire extinguishing valve body, the guide rod is slidably connected to the mounting hole, and an elastic member is connected between the fire extinguishing valve body and the fire extinguishing valve stem.
3. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 2, characterized in that: The guide rod comprises a rod portion and a head portion connected to the top end of the rod portion, wherein the head portion is connected to the upper surface of the fire extinguishing valve body; the rod portion passes through the fire extinguishing valve body and is slidably connected to the fire extinguishing valve stem.
4. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 3, characterized in that: The inner wall of the fire extinguishing valve seat is provided with a clamping groove; in the fire extinguishing state, the outer side wall of the fire extinguishing valve body is sealed and connected to the clamping groove.
5. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 1, characterized in that: The thermal sensitive component is a fusible head, which includes a fusible head body and a fusible head support seat connected to the top of the fusible head body, the bottom of the fusible head body is connected to the fire extinguishing valve body, and the fusible head support seat is connected to the top cover.
6. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 1, characterized in that: The main valve body includes a first valve body and a second valve body connected to the top of the first valve body, the first channel is arranged in the first valve body, and the second channel is arranged in the second valve body.
7. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 1, characterized in that: It also includes a flange, which is sealed and connected to the bottom of the main valve body.
8. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 7, characterized in that: It also includes a lower fire-blocking net, which is connected between the main valve body and the flange, and the bottom of the lower fire-blocking net extends into the flange.
9. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 1, characterized in that: It also includes a guide seat connected to the main valve body; the positive pressure valve is sleeved in the guide seat, and the positive pressure valve rises and falls in the guide seat; at least one opening is opened on the side wall of the guide seat.
10. The pressure vacuum valve for the exhaust pipe of a gasoline tank at a gas station according to claim 1, characterized in that: It also includes an upper fire-blocking net; the upper fire-blocking net is vertically sleeved between the main valve body and the positive pressure valve.