An explosion-proof valve for a brake system

Abstract

The present invention belongs to the technical field of explosion-proof brake system, specifically, an explosion-proof brake system valve, comprising an electromagnetic pressure limiting valve, a liquid filling overflow valve and a liquid filling valve, wherein the electromagnetic pressure limiting valve, the liquid filling overflow valve and the liquid filling valve are mounted on a hydraulic cylinder in the brake system, the liquid filling overflow valve comprising a fixed valve body 1 fixedly mounted above the hydraulic cylinder, a valve port is provided on the top of the fixed valve body 1, a storage block is fixedly mounted on the top of the fixed valve body 1, hydraulic oil enters into an L-shaped oil inlet groove 1 through the hydraulic cylinder, when the hydraulic oil enters into a position between a moving valve core 1 and a switching valve core 1 and is full, the switching valve core 1 is hydraulically pushed and moved, while the moving valve core 1 does not move, at this time, the hydraulic oil can flow from the gap between the moving valve core 1 and the switching valve core 1 to the inside of the L-shaped groove 2, and then enter into the storage block through the valve port for storage, so that a portion of the hydraulic oil in the hydraulic cylinder is quickly introduced into the storage block, thereby reducing the internal pressure of the hydraulic cylinder.

Description

Technical Field

[0001] The invention belongs to the field of explosion-proof of brake systems, in particular to an explosion-proof valve of a brake system. Background Art

[0002] The explosion-proof valve of the brake system is a safety device, mainly used to prevent the brake system from exploding or being damaged under extreme conditions, such as when the internal pressure rises sharply. This explosion-proof valve is mainly used in hydraulic systems to ensure that the pressure can be quickly released in the case of overpressure to prevent the container from rupturing or exploding. The explosion-proof valve is usually installed on the hydraulic cylinder and connected to other components in the system through multiple pipe interfaces. When the pressure in the hydraulic system exceeds the set value, the explosion-proof valve will quickly inject hydraulic oil into other actuators of the brake system, such as the oil tank, accumulator and return oil pipeline, to release the pressure.

[0003] A patent document with publication number CN206563087U discloses an integrated hydraulic control valve, including a valve body, an upper valve cover is installed on the upper end of the valve body by bolts, an adjusting device is provided on the upper end of the upper valve cover, a plunger is vertically provided on the upper side of the adjusting device, an upper sealing ring and a lower sealing ring are provided in the valve cavity of the valve body, a guide device is sleeved on the plunger, a valve stem is clamped on one end of the guide device away from the adjusting device, and the guide device is located between the upper valve cover and the valve stem, and the guide device includes a guide sleeve, a return spring, a limit rod and a ball.

[0004] In vehicle design, the braking effect is achieved through the flow of hydraulic oil, but there may be excessive oil pressure inside the hydraulic cylinder, which may lead to explosion and damage. In traditional technology, the pressure reduction and explosion prevention effect is achieved by discharging the hydraulic oil inside the hydraulic cylinder, but the hydraulic cylinder is connected to the structure of multiple external brake systems. The hydraulic oil in the external brake system structure and the hydraulic cylinder flows in both directions. It is not convenient to only allow the hydraulic oil in the hydraulic cylinder to flow in one direction to the external brake system structure. Therefore, under the traditional technical solution, the rate of pressure relief and explosion prevention is slow.

[0005] To this end, the present invention provides a brake system explosion-proof valve. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the explosion-proof valve of a brake system described in the present invention includes an electromagnetic pressure-limiting valve, a liquid-filling overflow valve and a liquid-filling valve, the electromagnetic pressure-limiting valve, the liquid-filling overflow valve and the liquid-filling overflow valve are installed on a hydraulic cylinder in the brake system, the liquid-filling valve and the liquid-filling overflow valve are located below the electromagnetic pressure-limiting valve, a plurality of input-output interfaces are also installed on the outer side of the top of the hydraulic cylinder, the hydraulic cylinder is connected to other components in the brake system through the plurality of input-output interfaces, the liquid-filling overflow valve includes a fixed valve body 1 fixedly installed above the hydraulic cylinder, a valve port is opened on the top of the fixed valve body 1, and a storage block is fixedly installed on the top of the fixed valve body 1;

[0008] A valve slot 1 is provided inside the fixed valve body, and the valve slot 1 is connected to the valve port. A movable valve core 1 and a switch valve core 1 are movably installed inside the valve slot 1. The valve slot 1 includes an L-shaped oil inlet slot 1 provided inside the fixed valve body, and the L-shaped oil inlet slot 1 is connected to the hydraulic cylinder. The L-shaped oil inlet slot 1 is provided between the movable valve core 1 and the switch valve core 1. The valve slot 1 also includes an L-shaped slot 2 provided on the top of the fixed valve body, and the L-shaped slot 2 is connected to the valve port.

[0009] Preferably, valve groove one also includes a pressure chamber, a vertical groove, an oil movable chamber and a spring chamber opened inside the fixed valve body one, the pressure chamber, the vertical groove, the oil movable chamber and the spring chamber are connected, the L-shaped oil inlet groove one is connected with the vertical groove, and the oil movable chamber is connected with the L-shaped groove two.

[0010] Preferably, a sliding cavity is provided at the top of the pressure cavity, the sliding cavity is communicated with the vertical groove, and a pressure control groove is provided below the pressure cavity, the pressure control groove is communicated with the inside of the hydraulic cylinder.

[0011] Preferably, the switch valve core includes a cone installed inside the oil activity chamber and a T-shaped cylinder installed above the cone. The switch valve core also includes a fixed cylinder fixedly installed at the bottom of the spring chamber. The fixed cylinder is sleeved on the outside of the T-shaped cylinder, and a pressure spring is installed inside the T-shaped cylinder.

[0012] Preferably, the movable valve core 1 includes a piston slidably installed inside the pressure chamber and a sliding round block fixedly installed above the piston, the sliding round block is movably installed inside the vertical groove, and guide columns are installed through the piston and the sliding round block.

[0013] Preferably, a valve slot 2 is provided inside the filling valve, a movable valve core 2 and a switch valve core 2 are movably installed inside the valve slot 2, a plurality of oil inlet cleaning components are movably installed outside the switch valve core 2, the valve slot 2 and the valve slot 1 are slots made of the same shape, and the movable valve core 2 and the movable valve core 1 are components made of the same structure.

[0014] Preferably, the switch valve core 2 includes a lower cone and an upper cone fixedly installed above the lower cone, a T-type cylinder 2 is fixedly installed above the upper cone, a fixed cylinder 2 is sleeved on the outer side of the T-type cylinder 2, and a pressure spring 2 is installed on the top of the T-type cylinder 2.

[0015] Preferably, the oil inlet cleaning component includes an outer ring body and a plurality of support columns fixedly mounted on the inner side of the outer ring body, an inner ring body is fixedly mounted on one end of the plurality of support columns, and a filter arc plate is mounted between the outer ring body and the inner ring body.

[0016] Preferably, a circular groove is provided on the inner side of the inner ring body, an inclined arc groove is provided on the lower side of the inner ring body, and a plurality of spring guide columns are fixedly mounted on the outer side of the outer ring body.

[0017] Preferably, an arc-shaped through groove is formed inside the outer ring body, and a cleaning brush is fixedly mounted on the inner wall of the arc-shaped through groove.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. An explosion-proof valve for a brake system described in the present invention reduces the amount of hydraulic oil entering the hydraulic cylinder by controlling the electromagnetic pressure limiting valve, that is, reduces the amount of hydraulic oil entering the hydraulic cylinder from multiple input and output interfaces, and then allows the hydraulic oil in the hydraulic cylinder to enter the L-shaped oil inlet groove one through the hydraulic principle. When the hydraulic oil enters the position between the movable valve core one and the switch valve core one and is full, the switch valve core one is pushed and moved by the hydraulic pressure, while the movable valve core one does not move. At this time, the hydraulic oil can flow from the gap between the movable valve core one and the switch valve core one to the inside of the L-shaped groove two, and then enter the storage block through the valve port for storage, quickly introducing a portion of the hydraulic oil in the hydraulic cylinder into the storage block, reducing the internal pressure of the hydraulic cylinder, and avoiding excessive internal pressure of the hydraulic cylinder.

[0020] 2. The explosion-proof valve of a brake system described in the present invention, when the hydraulic oil enters the vertical groove through the hydraulic cylinder, in the initial state, the switch valve core 1 and the movable valve core 1 are in contact. At this time, the L-shaped oil inlet groove 1 entering is blocked by the switch valve core 1 and cannot flow from the vertical groove to the oil activity chamber. After the hydraulic oil entering from the L-shaped oil inlet groove 1 is full in the vertical groove, the switch valve core 1 is lifted and moved. At this time, the hydraulic oil can enter the oil activity chamber through the gap between the switch valve core 1 and the movable valve core 1 through the vertical groove, and then enter the storage block through the L-shaped groove 2 and the valve port. In this way, the hydraulic oil can only enter the storage block from the hydraulic cylinder to quickly release the internal pressure of the hydraulic cylinder.

[0021] 3. The explosion-proof valve of a brake system described in the present invention, when the switch valve core 2 rises, the lower cone and the upper cone will also rise, and the inclination of the upper cone is consistent with the inclined arc groove. Therefore, when the upper cone rises, it squeezes the inclined arc groove position, which will drive multiple oil inlet cleaning components to move outward. At this time, multiple spring guide column springs are compressed, and the outer sides of multiple outer ring bodies are in contact with the corresponding inner walls of valve groove 2. When the hydraulic oil flows from the outside of the lower cone, it will directly enter the spacing position between the outer ring body and the inner ring body, that is, it will be filtered by the filter arc plate. The filter arc plate will filter the solids and tiny impurities in the hydraulic oil to avoid increasing the wear of the components and reducing their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is an overall stereogram of the present invention;

[0024] Figure 2 It is a three-dimensional schematic diagram of the liquid-filled overflow valve in the present invention;

[0025] Figure 3 It is a side view schematic diagram of the first state of the liquid-filled overflow valve in the present invention;

[0026] Figure 4 It is a three-dimensional schematic diagram of a movable valve core 1 and a switch valve core 1 in the present invention;

[0027] Figure 5 It is a side perspective schematic diagram of the second state of the liquid-filled overflow valve in the present invention;

[0028] Figure 6 It is a schematic side view of the liquid filling valve in the present invention;

[0029] Figure 7 It is a three-dimensional schematic diagram of the movable valve core 2 and the switch valve core 2 in the present invention;

[0030] Figure 8 It is a three-dimensional schematic diagram of the switch valve core 2 in the present invention;

[0031] Fig. 9 It is a three-dimensional schematic diagram of the oil inlet cleaning component in the present invention.

[0032] In the figure: 1, hydraulic cylinder; 2, filling overflow valve; 21, fixed valve body 1; 22, valve port; 23, storage block; 24, valve slot 1; 241, pressure control slot; 242, pressure chamber; 243, sliding chamber; 244, L-shaped oil inlet slot 1; 245, vertical slot; 246, oil activity chamber; 247, spring chamber; 248, L-shaped slot 2; 3, filling valve; 31, valve slot 2; 32, switch valve core 2; 321, lower cone; 322, upper cone; 323, T-shaped cylinder 2; 324, fixed cylinder 2; 325, pressure spring 2; 33 , movable valve core two; 34, oil inlet cleaning component; 341, outer ring body; 3411, arc-shaped through groove; 342, inner ring body; 3421, circular ring groove; 3422, inclined arc groove; 343, spring guide column; 344, fixed column; 345, filter arc plate; 346, support column; 4, electromagnetic pressure limiting valve; 5, input and output interface; 6, movable valve core one; 61, piston; 62, guide column; 63, sliding round block; 7, switch valve core one; 71, cone one; 72, fixed cylinder one; 73, T-type cylinder one; 74, pressure spring one. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1-4 As shown, an explosion-proof valve for a brake system according to an embodiment of the present invention comprises an electromagnetic pressure-limiting valve 4, a filling overflow valve 2 and a filling valve 3, wherein the electromagnetic pressure-limiting valve 4, the filling overflow valve 2 and the filling overflow valve 3 are mounted on a hydraulic cylinder 1 in the brake system, the filling valve 3 and the filling overflow valve 2 are located below the electromagnetic pressure-limiting valve 4, a plurality of input / output interfaces 5 are mounted on the outer side of the top of the hydraulic cylinder 1, the hydraulic cylinder 1 is connected to other components in the brake system through the plurality of input / output interfaces 5, the filling overflow valve 2 comprises a fixed valve body 21 fixedly mounted above the hydraulic cylinder 1, a valve port 22 is opened on the top of the fixed valve body 21, and a storage block 23 is fixedly mounted on the top of the fixed valve body 21;

[0036] A valve slot 24 is provided inside the fixed valve body 21, and the valve slot 24 is communicated with the valve port 22. A movable valve core 6 and a switch valve core 7 are movably installed inside the valve slot 24. The valve slot 24 includes an L-shaped oil inlet slot 244 provided inside the fixed valve body 21, and the L-shaped oil inlet slot 244 is communicated with the hydraulic cylinder 1. The L-shaped oil inlet slot 244 is provided between the movable valve core 6 and the switch valve core 7. The valve slot 24 also includes an L-shaped slot 248 provided on the top of the fixed valve body 21, and the L-shaped slot 248 is communicated with the valve port 22.

[0037] Specifically, the hydraulic cylinder 1 allows the internal hydraulic oil to circulate in various components of the brake system through multiple input and output interfaces 5. The electromagnetic pressure limiting valve 4 is a device that uses electromagnetic force to control the opening and closing of the valve, thereby controlling the hydraulic oil flow rate of the input and output interfaces 5. It can play a role in limiting the pressure in the brake system. The electromagnetic pressure limiting valve 4 can accurately control the brake pressure and improve the safety and stability of the brake. When the internal pressure of the hydraulic cylinder 1 is too high, it is prone to explosion and damage. At this time, it is urgent to release the pressure inside the hydraulic cylinder 1 in a short time. First, the electromagnetic pressure limiting valve 4 is controlled to reduce the hydraulic oil entering the hydraulic cylinder 1, that is, to reduce the pressure from multiple input and output interfaces. The amount of hydraulic oil entering the hydraulic cylinder 1 at the interface 5, and then the hydraulic oil inside the hydraulic cylinder 1 enters the L-shaped oil inlet groove 244 through the hydraulic principle. When the hydraulic oil enters the position between the movable valve core 6 and the switch valve core 7 and is full, the switch valve core 7 is pushed and moved by the hydraulic pressure, while the movable valve core 6 does not move. At this time, the hydraulic oil can flow from the gap between the movable valve core 6 and the switch valve core 7 to the inside of the L-shaped groove 248, and then enter the storage block 23 through the valve port 22 for storage, quickly introducing a part of the hydraulic oil inside the hydraulic cylinder 1 into the storage block 23, reducing the internal pressure of the hydraulic cylinder 1 and avoiding excessive internal pressure of the hydraulic cylinder 1.

[0038] like Figure 3 As shown, the valve groove 24 also includes a pressure chamber 242, a vertical groove 245, an oil movable chamber 246 and a spring chamber 247 opened inside the fixed valve body 21, the pressure chamber 242, the vertical groove 245, the oil movable chamber 246 and the spring chamber 247 are connected, the L-shaped oil inlet groove 244 is connected to the vertical groove 245, and the oil movable chamber 246 is connected to the L-shaped groove 248.

[0039] A sliding chamber 243 is provided at the top of the pressure chamber 242 , and the sliding chamber 243 is communicated with the vertical groove 245 . A pressure control groove 241 is provided below the pressure chamber 242 , and the pressure control groove 241 is communicated with the inside of the hydraulic cylinder 1 .

[0040] Specifically, under the hydraulic principle, when the hydraulic oil inside the hydraulic cylinder 1 enters the vertical groove 245 through the L-shaped oil inlet groove 244, in the initial state, the switch valve core 7 and the movable valve core 6 are in contact. At this time, the L-shaped oil inlet groove 244 entering is blocked by the switch valve core 7 and cannot flow from the vertical groove 245 to the oil activity chamber 246. After the hydraulic oil entering from the L-shaped oil inlet groove 244 is fully accumulated in the vertical groove 245, the switch valve core 7 is lifted and moved. At this time, the hydraulic oil can enter the oil activity chamber 246 from the gap between the switch valve core 7 and the movable valve core 6 through the vertical groove 245, and then enter the storage block 23 through the L-shaped groove 248 and the valve port 22. In this way, the hydraulic oil can only enter the storage block 23 from the hydraulic cylinder 1 to quickly release the internal pressure of the hydraulic cylinder 1.

[0041] like Figure 4-5 As shown, the switch valve core 7 includes a cone 71 movably installed in the oil movable chamber 246 and a T-type cylinder 73 fixedly installed above the cone 71. The switch valve core 7 also includes a fixed cylinder 72 fixedly installed at the bottom of the spring chamber 247. The fixed cylinder 72 is sleeved on the outside of the T-type cylinder 73. The T-type cylinder 73 slides inside the fixed cylinder 72. A pressure spring 74 is installed inside the T-type cylinder 73. The movable valve core 6 includes a piston 61 slidably installed in the pressure chamber 242 and a sliding block 63 fixedly installed above the piston 61. The sliding block 63 is movably installed in the vertical groove 245. A guide column 62 is installed through the piston 61 and the sliding block 63. The sliding block 63, the piston 61 and the guide column 62 are fixedly connected.

[0042] Specifically, when oil enters the L-shaped oil inlet groove 244, hydraulic pressure will accumulate in the vertical groove 245, thereby generating pressure on the sliding round block 63 and the cone 71. One end of the guide column 62 contacts the inner side of the pressure chamber 242, and the other end contacts the cone 71. Therefore, the pressure generated by the hydraulic oil in the vertical groove 245 on the movable valve core 6 cannot move the movable valve core 6. However, the pressure generated by the hydraulic oil in the vertical groove 245 on the cone 71 will cause the cone 71 and the T-shaped cylinder 73 to move away from the movable valve core 6. At this time, the pressure spring 74 is compressed, and the fixed cylinder 72 serves as a guide structure for the movement of the T-shaped cylinder 73. At this time, the flow of hydraulic oil from the hydraulic cylinder 1 to the storage block 23 is unidirectional. , the pressure inside the hydraulic cylinder 1 can be quickly relieved to perform explosion-proof work. An electromagnetic reversing valve can be set inside the hydraulic cylinder 1. When the pressure relief inside the hydraulic cylinder 1 is completed and there is no danger of explosion and damage, the hydraulic oil inside the hydraulic cylinder 1 is first allowed to enter the pressure chamber 242 through the pressure control groove 241 through the reversing valve. After the hydraulic oil inside the pressure chamber 242 is full, pressure is applied to the piston 61, causing the piston 61 to move toward the sliding chamber 243, thereby driving the guide column 62 and the switch valve core 7 to move. At this time, the pressure spring 74 is compressed, and the hydraulic oil inside the storage block 23 can enter the low-pressure hydraulic cylinder 1 from the L-shaped groove 248, the oil activity chamber 246, the vertical groove 245 and the L-shaped oil inlet groove 244.

[0043] like Figure 6As shown, a valve slot 2 31 is provided inside the filling valve 3, a movable valve core 2 33 and a switch valve core 2 32 are movably installed inside the valve slot 2 31, and a plurality of oil inlet cleaning components 34 are movably installed outside the switch valve core 2 32. The valve slot 2 31 and the valve slot 1 24 are slots made of the same shape, the movable valve core 2 33 and the movable valve core 1 6 are components made of the same structure, and the movable valve core 2 33 is installed in the valve slot 2 31 in the same manner as the movable valve core 1 6 is installed in the valve slot 1 24.

[0044] Embodiment 2

[0045] like Figure 7-9 As shown, compared with Example 1, another implementation of the present invention is: the switch valve core 2 32 includes a lower cone 321 and an upper cone 322 fixedly installed above the lower cone 321, a T-type cylinder 2 323 is fixedly installed above the upper cone 322, a fixed cylinder 2 324 is sleeved on the outer side of the T-type cylinder 323, the fixed cylinder 2 324 is fixedly connected to the valve slot 2 31, a pressure spring 2 325 is installed on the top of the T-type cylinder 323, the oil inlet cleaning component 34 includes an outer ring body 341 and a plurality of support columns 346 fixedly installed on the inner side of the outer ring body 341, an inner ring body 342 is fixedly installed on one end of the plurality of support columns 346, and a filtering arc plate 345 is installed between the outer ring body 341 and the inner ring body 342.

[0046] A circular groove 3421 is formed on the inner side of the inner ring body 342 , an inclined arc groove 3422 is formed on the lower side of the inner ring body 342 , and a plurality of spring guide pillars 343 are fixedly mounted on the outer side of the outer ring body 341 .

[0047] Specifically, when it is necessary to quickly release the internal pressure of the hydraulic cylinder 1, the hydraulic oil in the hydraulic cylinder 1 can be introduced into other structures of the brake system. At this time, the filling valve 3 can export the hydraulic oil in the hydraulic cylinder 1. A valve slot 2 31 is provided in the filling valve 3. A switch valve core 2 32 and a movable valve core 2 33 are movably installed inside the valve slot 2 31. The principle of exporting the hydraulic oil by the filling valve 3 is similar to that of the filling overflow valve 2. When the movable valve core 1 6 is not hydraulically acted on, when the hydraulic oil flows into the valve slot 1 24, it still passes through the gap between the movable valve core 1 6 and the switch valve core 1 7. At this time, the switch valve core 1 7 is pushed to move by the pressure, and the flow direction of the hydraulic oil introduced into other structures through the valve slot 1 24 is unidirectional, thereby ensuring the rapid export of the hydraulic oil and performing explosion-proof work, but In this embodiment, when the switch valve core 32 rises, the lower cone 321 and the upper cone 322 also rise. The inclination of the upper cone 322 is consistent with the inclined arc groove 3422. Therefore, when the upper cone 322 rises, it squeezes the position of the inclined arc groove 3422, which will drive the multiple oil inlet cleaning components 34 to move outward. At this time, the multiple spring guide columns 343 springs are compressed, and the outer sides of the multiple outer ring bodies 341 are in contact with the corresponding inner walls of the valve groove 31. When the hydraulic oil flows from the outside of the lower cone 321, it will directly enter the spacing position between the outer ring body 341 and the inner ring body 342, that is, it will be filtered by the filter arc plate 345. The filter arc plate 345 filters the solids and tiny impurities in the hydraulic oil to avoid increasing the wear of the components and reducing their service life.

[0048] like Fig. 9 As shown, an arc-shaped through groove 3411 is formed inside the outer ring body 341 , and a cleaning brush is fixedly installed on the inner wall of the arc-shaped through groove 3411 .

[0049] Specifically, when the hydraulic oil does not pass through the inside of the valve slot 21, the pressure spring 225 is not compressed. At this time, the switch valve core 22 is in contact with the movable valve core 23, and the switch valve core 22 cooperates with the valve slot 21 to hinder the movement of the hydraulic oil, that is, the switch valve core 22 is not pushed to move by the movable valve core 23. At this time, the inner ring bodies 342 of the multiple oil inlet cleaning components 34 are in contact, and the multiple annular grooves 3421 are in contact with the T-type cylinder 223. Because the outer ring body 341 and the inner ring body 342 move, and the filter arc plate 345 and the fixed column 344 are fixed, the outer ring body 341 is covered on the outside of the filter arc plate 345 and moves, and the inner wall of the outer ring body 341 is The cleaning brush will scrape away the debris filtered on the filter arc plate 345, and the upper and lower parts of the filter arc plate 345 are scratched. The scraped impurities will be retained on the cleaning brush on the inner wall of the outer ring body 341, ensuring the service life of the filter arc plate 345. When the oil inlet cleaning component 34 moves and the filter arc plate 345 is again inside the outer ring body 341 and the inner ring body 342, the frame position of the filter arc plate 345 is inside the outer ring body 341, preventing the hydraulic oil from impacting the cleaning brush and taking away the debris on the cleaning brush. By filtering impurities in the hydraulic brake system, the pressure brought to the hydraulic cylinder 1 by the impurities can be effectively reduced, thereby achieving a further explosion-proof effect.

[0050] Working principle: The hydraulic cylinder 1 allows the internal hydraulic oil to circulate in various components of the brake system through multiple input and output interfaces 5. The electromagnetic pressure-limiting valve 4 is a device that uses electromagnetic force to control the opening and closing of the valve, thereby controlling the flow of hydraulic oil in the input and output interfaces 5. It can play a role in limiting pressure in the brake system. The electromagnetic pressure-limiting valve 4 can accurately control the brake pressure and improve the safety and stability of braking. When the internal pressure of the hydraulic cylinder 1 is too high, it is prone to explosion and damage. At this time, it is urgent to release the pressure inside the hydraulic cylinder 1 in a short time. First, the electromagnetic pressure-limiting valve 4 is controlled to reduce the hydraulic oil entering the hydraulic cylinder 1, that is, to reduce the hydraulic oil entering the hydraulic cylinder 1 from multiple input and output interfaces 5. The amount of hydraulic oil is then used to allow the hydraulic oil in the hydraulic cylinder 1 to enter the L-shaped oil inlet groove 244 through the hydraulic principle. When the hydraulic oil enters the position between the moving valve core 16 and the switch valve core 17 and is full, the switch valve core 17 is hydraulically pushed and moved, while the moving valve core 16 does not move. At this time, the hydraulic oil can flow from the gap between the moving valve core 16 and the switch valve core 17 to the inside of the L-shaped groove 248, and then enter the storage block 23 through the valve port 22 for storage, quickly introducing a part of the hydraulic oil in the hydraulic cylinder 1 into the storage block 23, reducing the internal pressure of the hydraulic cylinder 1 and avoiding excessive internal pressure of the hydraulic cylinder 1. When the internal pressure of the hydraulic cylinder 1 needs to be quickly released, the hydraulic oil in the hydraulic cylinder 1 can be The oil is introduced into other structures of the brake system. At this time, the filling valve 3 can guide the hydraulic oil in the hydraulic cylinder 1. A valve slot 2 31 is provided in the filling valve 3. A switch valve core 2 32 and a movable valve core 2 33 are movably installed inside the valve slot 2 31. The principle of guiding the hydraulic oil by the filling valve 3 is similar to that of the filling overflow valve 2. When the movable valve core 1 6 is not hydraulically acted on, when the hydraulic oil flows into the valve slot 1 24, it still passes through the gap between the movable valve core 1 6 and the switch valve core 1 7. At this time, the switch valve core 1 7 is pushed to move by the pressure. The flow direction of the hydraulic oil introduced into other structures through the valve slot 1 24 is unidirectional, thereby ensuring the rapid guidance of the hydraulic oil and performing explosion-proof work. However, in this embodiment, the switch valve core 2 32 rises When the upper cone 322 rises, the lower cone 321 and the upper cone 322 will also rise. The inclination of the upper cone 322 is consistent with the inclined arc groove 3422. Therefore, when the upper cone 322 rises, it squeezes the position of the inclined arc groove 3422, which will drive multiple oil inlet cleaning components 34 to move outward. At this time, the springs of multiple spring guide columns 343 are compressed, and the outer sides of multiple outer ring bodies 341 are in contact with the corresponding inner walls of valve grooves 2 31. When the hydraulic oil flows from the outside of the lower cone 321, it will directly enter the spacing position between the outer ring body 341 and the inner ring body 342, that is, it will be filtered by the filter arc plate 345. The filter arc plate 345 filters the solids and tiny impurities in the hydraulic oil to avoid increasing the wear of the components and reducing their service life.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An explosion-proof valve for a brake system, comprising an electromagnetic pressure-limiting valve (4), a filling overflow valve (2) and a filling valve (3), wherein the electromagnetic pressure-limiting valve (4), the filling overflow valve (2) and the filling overflow valve (3) are installed on a hydraulic cylinder (1) in the brake system, wherein the filling valve (3) and the filling overflow valve (2) are located below the electromagnetic pressure-limiting valve (4), and a plurality of input / output interfaces (5) are installed on the outer side of the top of the hydraulic cylinder (1), wherein the hydraulic cylinder (1) is connected to other components in the brake system via the plurality of input / output interfaces (5), characterized in that: The filling overflow valve (2) comprises a fixed valve body (21) fixedly mounted above the hydraulic cylinder (1), the top of the fixed valve body (21) being provided with a valve port (22), and the top of the fixed valve body (21) being provided with a storage block (23); the interior of the fixed valve body (21) being provided with a valve slot (24) connected to the valve port (22), the interior of the valve slot (24) being provided with a movable valve core (6) and a switch valve core (7) movably mounted therein, the valve slot (24) comprising an L-shaped oil inlet slot (244) disposed inside the fixed valve body (21) and an L-shaped slot (248) disposed at the top of the fixed valve body (21), the L-shaped oil inlet slot (244) being disposed between the movable valve core (6) and the switch valve core (7) and being connected to the hydraulic cylinder (1), and the L-shaped slot (248) being connected to the valve port (22); The valve groove (24) further comprises a pressure chamber (242), a vertical groove (245), an oil movable chamber (246) and a spring chamber (247) which are opened inside the fixed valve body (21) and are interconnected. The L-shaped oil inlet groove (244) is connected to the vertical groove (245), and the oil movable chamber (246) is connected to the L-shaped groove (248). A sliding chamber (243) is opened at the top of the pressure chamber (242), and the sliding chamber (243) is connected to the vertical groove (245). A pressure control groove (241) is opened below the pressure chamber (242), and the pressure control groove (241) is connected to the inside of the hydraulic cylinder (1). When oil is introduced into the L-shaped oil inlet groove (244), hydraulic pressure is accumulated in the vertical groove (245), generating pressure on both the movable valve core (6) and the switch valve core (7). At this time, the movable valve core (243) is opened. 6) does not move, the switch valve core (7) moves in a direction away from the movable valve core (6), so that the vertical groove (245) and the movable chamber (246) are connected, and the hydraulic oil enters the storage block (23) through the L-shaped groove (248) and the valve port (22), thereby relieving the pressure inside the hydraulic cylinder (1); when the pressure relief inside the hydraulic cylinder (1) is completed and there is no danger of explosion and damage, the hydraulic oil inside the hydraulic cylinder (1) enters the pressure chamber (242) through the pressure control groove (241) through the reversing valve, thereby pushing the movable valve core (6) to move toward the sliding chamber (243), thereby driving the switch valve core (7) to move, and at this time, the hydraulic oil inside the storage block (23) can enter the low-pressure hydraulic cylinder (1) from the L-shaped groove (248), the oil movable chamber (246), the vertical groove (245) and the L-shaped oil inlet groove (244).

2. The explosion-proof valve for a brake system according to claim 1, characterized in that: The switch valve core (7) comprises a cone (71) movably mounted inside the oil movable chamber (246) and a T-shaped cylinder (73) fixedly mounted above the cone (71). The switch valve core (7) further comprises a fixed cylinder (72) fixedly mounted at the bottom of the spring chamber (247). The fixed cylinder (72) is sleeved on the outside of the T-shaped cylinder (73). The T-shaped cylinder (73) slides inside the fixed cylinder (72). A pressure spring (74) is installed inside the T-shaped cylinder (73).

3. The explosion-proof valve for a brake system according to claim 1, characterized in that: The movable valve core (6) comprises a piston (61) slidably mounted inside the pressure chamber (242) and a sliding round block (63) fixedly mounted above the piston (61); the sliding round block (63) is movably mounted inside the vertical groove (245); a guide column (62) is installed through the piston (61) and the sliding round block (63); the sliding round block (63), the piston (61) and the guide column (62) are fixedly connected.

4. The explosion-proof valve for a brake system according to claim 1, characterized in that: The filling valve (3) is provided with a valve groove 2 (31) inside, and a movable valve core 2 (33) and a switch valve core 2 (32) are movably installed inside the valve groove 2 (31), and a plurality of oil inlet cleaning components (34) are movably installed outside the switch valve core 2 (32). The valve groove 2 (31) and the valve groove 1 (24) are grooves made of the same shape, and the movable valve core 2 (33) and the movable valve core 1 (6) are components made of the same structure. The movable valve core 2 (33) is installed inside the valve groove 2 (31) in the same way as the movable valve core 1 (6) is installed inside the valve groove 1 (24).

5. The explosion-proof valve for a brake system according to claim 4, characterized in that: The switch valve core (32) comprises a lower cone (321) and an upper cone (322) fixedly mounted above the lower cone (321); a T-shaped cylinder (323) is fixedly mounted above the upper cone (322); a fixed cylinder (324) is sleeved on the outer side of the T-shaped cylinder (323); the fixed cylinder (324) is fixedly connected to the valve slot (31); and a pressure spring (325) is mounted on the top of the T-shaped cylinder (323).

6. The explosion-proof valve for a brake system according to claim 5, characterized in that: The oil inlet cleaning component (34) comprises an outer ring body (341) and a plurality of support columns (346) fixedly mounted on the inner side of the outer ring body (341); an inner ring body (342) is fixedly mounted on one end of the plurality of support columns (346); and a filtering arc plate (345) is mounted between the outer ring body (341) and the inner ring body (342).

7. The explosion-proof valve for a brake system according to claim 6, characterized in that: The inner side of the inner ring body (342) is provided with a circular groove (3421), the lower side of the inner ring body (342) is provided with an inclined arc groove (3422), the inclination of the upper cone (322) is consistent with the inclined arc groove (3422), and a plurality of spring guide pillars (343) are fixedly installed on the outer side of the outer ring body (341); an arc-shaped through-groove (3411) is provided through the inner side of the outer ring body (341), and a cleaning brush is fixedly installed on the inner wall of the arc-shaped through-groove (3411); when the switch valve core (32) rises, the upper cone (322) squeezes the inclined arc groove (3422) to drive the plurality of outer ring bodies 341 and the inner ring body 342 move outward, at which time the springs of the multiple spring guide pillars (343) are compressed, and the outer ring body (341) moves on the outside of the filter arc plate (345) through the arc-shaped through groove (3411) cover until the outer sides of the multiple outer ring bodies (341) contact the inner wall of the corresponding valve groove 2 (31). At this time, the filter arc plate (345) is inside the outer ring body (341) and the inner ring body (342). When the hydraulic oil flows from the outside of the lower cone (321), it will directly enter the spacing position between the outer ring body (341) and the inner ring body (342) and be filtered by the filter arc plate (345).

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