Hydraulic trigger type automatic reset hydraulic valve

Abstract

The invention discloses a hydraulic trigger type automatic reset hydraulic valve, relates to the technical field of hydraulic valves, and aims to solve the problems that after long-time work, hydraulic oil is gradually sticky, and internal fine impurities are accumulated to easily block a pressure relief circulation pipeline, so that the hydraulic valve cannot relieve pressure. According to the hydraulic trigger type automatic reset hydraulic valve, through cooperation of the filter ring and the filter cover, large impurities are blocked by the filter ring, small impurities are blocked by the filter cover, small impurity liquid flow is matched with the conical face, the small impurities are accumulated at the end, close to the blocking block, of the cavity pipe, and only the impurities in the cavity pipe can be cleaned by opening the blocking block during cleaning; the problems that in the working process of the hydraulic valve, internal circulating liquid is hydraulic oil, after long-time working, the hydraulic oil is gradually sticky, internal tiny impurities are accumulated to easily block a pressure relief circulating pipeline, and consequently the hydraulic valve cannot relieve pressure are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic valves, in particular to a hydraulically triggered automatic reset hydraulic valve. Background Art

[0002] At present, hydraulic valves are important components in hydraulic systems that control and regulate the pressure, flow, and direction of hydraulic oil. They are crucial to ensuring that hydraulic systems can operate accurately and stably according to predetermined requirements. Hydraulically triggered automatic reset hydraulic valves are hydraulic valves that can automatically return to their initial position or state after being triggered by specific hydraulic conditions. Hydraulically triggered automatic reset hydraulic valves have an automatic reset function and do not require additional manual operation or external power source to reset them. They are widely used in hydraulic systems that require automatic control and high reliability. When a hydraulic valve is in use, the fluid circulating inside is mostly hydraulic oil. After working for a long time, the hydraulic oil gradually becomes viscous, and the accumulation of small impurities inside can easily clog the pressure relief circulation pipe, causing the hydraulic valve to be unable to relieve pressure. Summary of the Invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solutions: a hydraulically triggered automatic reset hydraulic valve, comprising: The valve body has a liquid inlet interface, a pressure relief interface and a liquid outlet interface installed on the outside of the valve body. The liquid outlet interface is installed at the center of the outside of the valve body. The liquid inlet interface and the pressure relief interface are installed on the side away from the liquid outlet interface and are installed symmetrically with the liquid outlet interface as the center. A positioning ring is fixedly connected to the side of the inner wall of the valve body close to the pressure relief interface; A valve core, which is used to relieve pressure and divert flow when the hydraulic pressure increases, and is installed inside the valve body; A liquid screening mechanism, which is used to filter the liquid discharged from the liquid outlet interface and is installed on the outside of the valve core; The valve core includes a cavity tube and an adjustment component. The inner wall of the cavity tube is provided with a first flow channel and a second flow channel. A through groove is provided between the first flow channel and the second flow channel. The first flow channel and the second flow channel are connected through the through groove. A filter ring is fixedly installed on the outside of the cavity tube. The filter ring cooperates with the filter cover so that large impurities are blocked by the filter ring and small impurities are blocked by the filter cover. The small impurities flow in the liquid and cooperate with the conical surface to make the small impurities accumulate at one end of the cavity tube near the block. When cleaning, the block can be opened to clean the cavity. Impurities in the pipe are avoided. During the operation of the hydraulic valve, the liquid circulating inside is hydraulic oil. After a long period of operation, the hydraulic oil gradually becomes viscous, and the accumulation of small impurities inside can easily block the pressure relief circulation pipe, causing the hydraulic valve to be unable to relieve pressure. The outside of the filter ring is symmetrically provided with filter holes, and the end of the cavity tube away from the positioning ring is threadedly connected to a plug. The end of the first flow channel away from the second flow channel is fixedly connected to a filter cover, the outside of the filter cover is a conical surface and is evenly provided with filter holes, and the filter hole diameter of the filter ring is larger than the filter hole diameter of the filter cover.

[0004] Preferably, the first flow channel is a tapered flow channel and the inner diameter gradually decreases as it moves away from the filter cover. The outer side of the cavity is fixedly connected to the inner wall of the liquid screening mechanism. A fixed ring is slidably installed on the outer side of the filter ring. Through the contact between the fixed ring and the filter ring, the flow pipeline is blocked and the hydraulic pressure fluctuates. During the process of reciprocating sliding of the cavity and the filter ring on the inner wall of the fixed ring, the contact between the fixed ring and the filter ring when the filter ring slides cleans the impurities remaining on the surface of the filter ring to avoid impurities clogging the filter ring and affecting the speed of the liquid entering the first flow channel during pressure relief and diversion. The outer side of the fixed ring is fixedly connected to the inner wall of the valve body.

[0005] The cam is fixedly mounted on a side of the outer wall of the outer cover tube close to the positioning ring, and the outer side of the outer cover tube is slidably mounted on the inner wall of the positioning ring, and a hole ring is fixedly mounted on the side of the outer cover tube away from the positioning ring, and through holes are evenly opened on the outer side of the hole ring, and a slip ring is slidably mounted on the inner wall of the hole ring, and the inner wall of the slip ring is tightly fitted with the outer side of the cavity tube, and a top plate is fixedly mounted on the side of the slip ring close to the outer cover tube, and the top plate cooperates with the slip ring, and when the internal pressure is large, it slides with the slide rod, and under different pressures, it slides different distances, so that the slip ring moves different distances, so that the connecting gap of the hole ring changes, and a larger gap is opened when the pressure increases, thereby accelerating the pressure relief speed and increasing the diversion flow. The inner wall of the top plate is slidably adapted to the inner wall of the cavity tube, and the inner wall of the top plate is fixedly connected to the slide rod, and the outer side of the slide rod is slidably adapted to the inner wall of the cavity tube.

[0006] Preferably, a sealing block is fixedly installed on the end of the slide rod away from the outer cover tube, and the side of the sealing block away from the slide rod is an inwardly concave arc surface, and the outer side of the sealing block is slidably adapted to the first flow channel of the cavity tube, and a first spring is installed on the side of the outer cover tube away from the hole ring. Through the cooperation of the first spring and the second spring, during the pressure relief and diversion process, when the pressure decreases, the second spring first drives the sealing block to reset, so that the sealing block blocks the through groove between the first flow channel and the second flow channel. After the pressure drops to a certain level, the first spring resets, so that the liquid screening mechanism is closed, the liquid outlet gap is closed, and automatic reset and opening are achieved according to the change of hydraulic pressure. The end of the first spring away from the outer cover tube is fixedly connected to the inner wall of the valve body, and the outer side of the outer cover tube is slidably adapted to the inner wall of the positioning ring, and the end of the slide rod away from the sealing block is fixedly installed with the second spring.

[0007] Preferably, the liquid screening mechanism includes a chuck and a fixed disk, the fixed disk and the outer side of the chuck are fixedly connected to the inner wall of the valve body, the inner wall of the fixed disk is slidably adapted to the outer side of the cavity tube, and a groove is provided on the outer side of the chuck, and a sealing disk is clamped on the side of the chuck close to the fixed disk, and a clamping block is fixedly installed on the outer side of the sealing disk, and the clamping block is evenly installed along the center position of the sealing disk, and is clamped between the sealing disk and the chuck by clamping the clamping block and the groove. When the sealing outlet gap is closed, the corresponding position between the chuck and the sealing disk is guaranteed to avoid misalignment affecting the sealing effect, and at the same time, the groove annular groove of the sealing disk increases the contact area between the sealing disk and the liquid, and accepts the impact pressure of the liquid to a greater extent, so that when the liquid is discharged, the sealing disk moves quickly to open the gap, and cooperates with the connecting disk to make the fixed disk limit the sliding range of the connecting disk, thereby controlling the maximum pressure during pressure relief and diversion, and an inner concave annular groove is provided on the side of the sealing disk away from the fixed disk.

[0008] Preferably, a connecting disk is fixedly installed on one side of the sealing disk close to the fixed disk, and the inner wall of the connecting disk is fixedly connected to the outer side of the cavity, and the inner wall of the sealing disk is tightly fitted with the outer side of the cavity. Side sieve rings are fixedly installed on the opposite surfaces of the fixed disk and the chuck, and the side sieve rings cooperate with the arc-shaped sieve cover to filter the discharged liquid by utilizing the sieve holes of the side sieve ring and the sieve grooves of the arc-shaped sieve cover. At the same time, during the filtering process, the arc bulging outward at the center position of the arc-shaped sieve cover provides storage space for the sieved impurities, so as to avoid the impurities sieved out during the filtering operation affecting the movement of the sealing disk, resulting in the inability to seal the flow gap. Sieve holes are evenly provided on the outer side of the side sieve rings, and an arc-shaped sieve cover is fixedly installed between the side sieve rings, and the center position of the arc-shaped sieve cover bulges outward and sieve grooves are evenly provided on the outer side.

[0009] The present invention provides a hydraulically triggered automatic reset hydraulic valve. It has the following beneficial effects: 1. The hydraulic trigger type automatic reset hydraulic valve cooperates with the filter ring and the filter cover to block large impurities by the filter ring and block small impurities by the filter cover. The liquid flow of small impurities and the cooperation of the conical surface make the small impurities accumulate at one end of the cavity tube near the block. When cleaning, the block can only be opened to clean the impurities in the cavity tube, avoiding the hydraulic oil circulating in the hydraulic valve during operation. After a long time of operation, the hydraulic oil gradually becomes viscous, and the accumulation of small impurities inside can easily block the pressure relief circulation pipe, causing the hydraulic valve to be unable to relieve pressure.

[0010] 2. This hydraulically triggered automatic reset hydraulic valve, through the contact between the fixed ring and the filter ring, blocks the flow pipe, causes hydraulic fluctuations, and the cavity tube and the filter ring slide back and forth on the inner wall of the fixed ring. Through the contact between the fixed ring and the filter ring when sliding, the impurities remaining on the surface of the filter ring are cleaned to avoid impurities clogging the filter ring and affecting the speed of the liquid entering the first flow channel during pressure relief and diversion.

[0011] 3. The hydraulic trigger type automatic reset hydraulic valve cooperates with the slip ring through the top plate. When the internal pressure is high, it slides with the slide rod. Under different pressures, it slides different distances, causing the slip ring to move different distances, changing the communication gap of the hole ring. When the pressure increases, a larger gap is opened, which speeds up the pressure relief speed and increases the diversion flow.

[0012] 4. The hydraulically triggered automatic reset hydraulic valve is connected between the sealing disc and the chuck by using the clamping block and the clamping groove. When the sealing outlet gap is closed, the corresponding position between the chuck and the sealing disc is ensured to avoid misalignment affecting the sealing effect. At the same time, the groove and ring groove of the sealing disc increase the contact area between the sealing disc and the liquid, and can accept the impact pressure of the liquid to a greater extent. When the liquid is exported, the sealing disc moves quickly to open the gap, and at the same time cooperates with the connecting disc to make the fixed disc limit the sliding range of the connecting disc, thereby controlling the maximum pressure during pressure relief and diversion.

[0013] 5. The hydraulically triggered automatic reset hydraulic valve cooperates with the side sieve ring and the arc-shaped sieve cover to filter the discharged liquid using the sieve holes of the side sieve ring and the sieve grooves of the arc-shaped sieve cover. At the same time, during the filtering process, the arc protruding outward from the center of the arc-shaped sieve cover provides storage space for the screened impurities, preventing the impurities screened out during the filtering operation from affecting the movement of the sealing disk, resulting in the flow gap being unable to be sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the external structure of a hydraulically triggered automatic reset hydraulic valve of the present invention; Figure 2 This is a side view of the structure of a hydraulically triggered automatic reset hydraulic valve of the present invention; Figure 3 This is a structural anatomical diagram of a hydraulically triggered automatic reset hydraulic valve according to the present invention; Figure 4 This is an anatomical diagram of the valve core structure of the present invention; Figure 5 This is a partial structural sectional view of the valve core of the present invention; Figure 6 This is an anatomical diagram of the regulating component structure of the present invention; Figure 7 Schematic diagram of the liquid screening mechanism structure of the present invention; Figure 8 It is an anatomical diagram of the liquid screening mechanism structure of the present invention.

[0015] In the figure: 1. Valve body; 2. Valve core; 3. Liquid inlet interface; 4. Pressure relief interface; 5. Liquid outlet interface; 6. Liquid screening mechanism; 7. Positioning ring; 21. Fixing ring; 22. Plug; 23. Filter ring; 24. First flow channel; 25. Cavity tube; 26. Filter cover; 27. Through groove; 28. Second flow channel; 29. ​​Adjustment assembly; 291. Sealing block; 292. Slide rod; 293. Slip ring; 294. Orifice ring; 295. Top plate; 296. First spring; 297. Outer cover tube; 298. Second spring; 61. Sealing plate; 62. Chuck; 63. Fixing plate; 64. Arc-shaped screen cover; 65. Block; 66. Connecting plate; 67. Side screen ring. DETAILED DESCRIPTION

[0016] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0017] The first embodiment, as Figures 1 to 4 As shown, the present invention provides a technical solution: a hydraulically triggered automatic reset hydraulic valve, comprising: The valve body 1 has a liquid inlet port 3, a pressure relief port 4, and a liquid outlet port 5 installed on the outside of the valve body 1. The liquid outlet port 5 is installed at the center of the outside of the valve body 1. The liquid inlet port 3 and the pressure relief port 4 are installed on the side away from the liquid outlet port 5 and are symmetrically installed with the liquid outlet port 5 as the center. A positioning ring 7 is fixedly connected to the side of the inner wall of the valve body 1 near the pressure relief port 4. The valve core 2 is used to relieve pressure and divert flow when the hydraulic pressure increases, and the valve core 2 is installed inside the valve body 1; a liquid screening mechanism 6, which is used to filter the liquid discharged from the liquid outlet 5 and is installed on the outside of the valve core 2; Among them, the valve core 2 includes a cavity 25 and an adjusting component 29. The inner wall of the cavity 25 is provided with a first flow channel 24 and a second flow channel 28. A through groove 27 is provided between the first flow channel 24 and the second flow channel 28. The first flow channel 24 and the second flow channel 28 are connected through the through groove 27. A filter ring 23 is fixedly installed on the outside of the cavity 25. The filter holes are symmetrically provided on the outside of the filter ring 23. The end of the cavity 25 away from the positioning ring 7 is threadedly connected to the plug 22. The end of the first flow channel 24 away from the second flow channel 28 is fixedly connected to the filter cover 26. After the screening mechanism 6 opens the gap and drives the cavity 25 to move, the filter ring 23 is fixedly installed on the outside of the cavity 25. The cavity 25 slides together with the filter ring 23 along the inner wall of the fixed ring 21, so that the filter ring 23 contacts the liquid introduced into the valve body 1, so that the liquid can pass through the filter holes of the filter ring 23 and enter the interior of the cavity 25. At the same time, after being filtered by the filter ring 23, large impurities in the liquid are removed. After entering the cavity, the fine impurities in the liquid are blocked by the filter cover 26. During the flow, the impurities are guided by the conical surface of the filter cover 26, so that they accumulate at one end of the cavity 25. The outer side of the filter cover 26 is a conical surface and is evenly provided with filter holes. The filter hole diameter of the filter ring 23 is larger than the filter hole diameter of the filter cover 26.

[0018] The first flow channel 24 is a conical flow channel and its inner diameter gradually decreases as it moves away from the filter cover 26. The outer side of the cavity 25 is fixedly connected to the inner wall of the liquid screening mechanism 6. The liquid entering the first flow channel 24 accelerates the flow rate and impacts the sealing block 291 under the influence of the path change of the first flow channel 24. A fixing ring 21 is slidably installed on the outer side of the filter ring 23, and the outer side of the fixing ring 21 is fixedly connected to the inner wall of the valve body 1.

[0019] The second embodiment, based on the first embodiment, see Figures 5 and 6As shown, the adjustment component 29 includes an outer cover tube 297, which is fixedly mounted on the side of the outer side of the cavity tube 25 close to the positioning ring 7, and the outer side of the outer cover tube 297 is slidably mounted on the inner wall of the positioning ring 7, and a hole ring 294 is fixedly mounted on the side of the outer cover tube 297 away from the positioning ring 7. Through holes are evenly opened on the outer side of the hole ring 294, and a slip ring 293 is slidably mounted on the inner wall of the hole ring 294. The inner wall of the slip ring 293 fits tightly with the outer side of the cavity tube 25, and a top plate 295 is fixedly mounted on the side of the slip ring 293 close to the outer cover tube 297. When the liquid screening mechanism 6 opens the gap and the liquid is discharged from the liquid outlet interface 5, the cavity tube 25 is fixedly connected to the connecting plate 66, so that the connecting plate 66 drives the cavity tube 25 and the outer cover tube 297 to move toward the positioning ring 7 during the movement. The outer cover tube 297 compresses the first spring 296 and deforms it. At this time, the liquid can enter the first flow channel 24 inside the cavity tube 25. After the liquid introduction flow rate is accelerated and the liquid cannot be quickly discharged, the internal hydraulic pressure increases. After the liquid enters the first flow channel 24, it impacts the concave arc surface of the sealing block 291, so that the pressure is transmitted to the slide rod 292 through the sealing block 291, compressing the second spring 298 and deforming the slide rod 292 and the sealing block 291. The slide rod 292 and the sealing block 291 slide on the inner wall of the cavity tube 25, so that the sealing block 291 moves to open the through groove 27 between the first flow channel 24 and the second flow channel 28, so that the liquid can enter the second flow channel 28 from the first flow channel 24. The inner wall of the top plate 295 is slidably adapted to the inner wall of the cavity tube 25, and the inner wall of the top plate 295 is fixedly connected to the slide rod 292, and the outer side of the slide rod 292 is slidably adapted to the inner wall of the cavity tube 25.

[0020] The end of the slide rod 292 away from the outer cover tube 297 is fixedly installed with a sealing block 291, and the side of the sealing block 291 away from the slide rod 292 is an inwardly concave arc surface, and the outer side of the sealing block 291 is slidably adapted to the first flow channel 24 of the cavity tube 25, and the side of the outer cover tube 297 away from the hole ring 294 is installed with a first spring 296, and the end of the first spring 296 away from the outer cover tube 297 is fixedly connected to the inner wall of the valve body 1. During the sliding of the slide rod 292, the top plate 295 drives the slide ring 293 to move, so that the through hole of the hole ring 294 is connected to the second flow channel 28, so that the diverted liquid can flow out from the through hole of the hole ring 294 and be diverted and discharged by the pressure relief interface 4, thereby reducing the pressure inside the valve body 1. The outer side of the outer cover tube 297 is slidably adapted to the inner wall of the positioning ring 7, and the end of the slide rod 292 away from the sealing block 291 is fixedly installed with a second spring 298.

[0021] The third embodiment, based on the first and second embodiments, see Figures 7 and 8As shown, the liquid screening mechanism 6 includes a chuck 62 and a fixed disk 63. The outer sides of the fixed disk 63 and the chuck 62 are fixedly connected to the inner wall of the valve body 1. The inner wall of the fixed disk 63 is slidably adapted to the outer side of the cavity 25. A card groove is provided on the outer side of the chuck 62. The side of the chuck 62 close to the fixed disk 63 is clamped with a sealing disk 61. The liquid is introduced into the valve body 1 from the liquid inlet interface 3, so that the liquid impacts the arc-shaped annular groove of the sealing disk 61, so that the sealing disk 61 and the connecting disk 66 drive the valve core 2 toward the positioning ring 7. It moves and limits the sliding of the valve core 2 through the positioning ring 7. At the same time, during the sliding process of the sealing disk 61, the clamping connection between the sealing disk 61 and the chuck 62 is released by the clamping block 65, so that a gap appears between the sealing disk 61 and the chuck 62, so that the liquid enters the inner side of the arc-shaped screen cover 64 and the side screen ring 67 through the gap. The outer side of the sealing disk 61 is fixedly installed with a clamping block 65, and the clamping block 65 is evenly installed along the center position of the sealing disk 61, and an inner concave annular groove is provided on the side of the sealing disk 61 away from the fixed disk 63.

[0022] A connecting disk 66 is fixedly installed on one side of the sealing disk 61 close to the fixed disk 63. The inner wall of the connecting disk 66 is fixedly connected to the outer side of the cavity 25. The inner wall of the sealing disk 61 fits tightly against the outer side of the cavity 25. The opposite surfaces of the fixed disk 63 and the chuck 62 are fixedly installed with side sieve rings 67. The side sieve rings 67 cooperate with the arc-shaped sieve cover 64 to guide and screen the liquid entering between the chuck 62 and the fixed disk 63. After the liquid is screened, it passes through the outer side of the side sieve ring 67 and the arc-shaped sieve cover 64 and is discharged through the liquid outlet interface 5. Sieve holes are evenly provided on the outer side of the side sieve ring 67, and an arc-shaped sieve cover 64 is fixedly installed between the side sieve rings 67. The center position of the arc-shaped sieve cover 64 protrudes outward and sieve grooves are evenly provided on the outer side.

[0023] When in use, the liquid inlet pipe, liquid outlet pipe and pressure relief pipe are connected to the liquid inlet interface 3, liquid outlet interface 5 and pressure relief interface 4 respectively, so that the liquid is introduced into the valve body 1 through the liquid inlet pipe. After the liquid is continuously added, the hydraulic pressure inside the valve body 1 gradually increases, so that the hydraulic pressure first impacts the liquid screening mechanism 6, so that the liquid screening mechanism 6 opens the liquid outlet gap, so that the liquid can be discharged from the liquid outlet interface 5, and drives the valve core 2 to slide inside the valve body 1, so that the liquid can enter the interior of the valve core 2. When the liquid introduction flow rate is too fast, the hydraulic pressure is increased, and the moving position of the liquid screening mechanism 6 reaches the maximum, the liquid enters the valve core 2, and the liquid is diverted and discharged through the valve core 2 under the pressure of the increased hydraulic pressure, so that the pressure relief interface 4 and the liquid outlet interface 5 discharge the liquid at the same time.

[0024] When the liquid is discharged within a certain hydraulic range through the liquid screening mechanism 6, the liquid is introduced into the valve body 1 through the liquid inlet interface 3, so that the liquid impacts the arc-shaped ring groove of the sealing disk 61, so that the sealing disk 61 and the connecting disk 66 drive the valve core 2 to move toward the positioning ring 7, and the sliding of the valve core 2 is restricted by the positioning ring 7. At the same time, during the sliding of the sealing disk 61, the clamping connection between the sealing disk 61 and the chuck 62 is released by the clamping block 65, so that a gap appears between the sealing disk 61 and the chuck 62, so that the liquid enters the inner side of the arc-shaped screen cover 64 and the side screen ring 67 through the gap, and the side screen ring 67 cooperates with the arc-shaped screen cover 64 to guide and screen the liquid between the chuck 62 and the fixed disk 63. After the liquid is screened, it passes through the outer side of the side screen ring 67 and the arc-shaped screen cover 64 and is discharged through the liquid outlet interface 5.

[0025] In the process of opening the gap of the liquid screening mechanism 6 and leading the liquid out of the liquid outlet interface 5, the cavity tube 25 is fixedly connected to the connecting disk 66, so that the connecting disk 66 drives the cavity tube 25 and the outer cover tube 297 to move toward the positioning ring 7 during the movement, so that the outer cover tube 297 compresses the first spring 296 and deforms it. At this time, the liquid can enter the first flow channel 24 inside the cavity tube 25. After the liquid introduction flow rate is accelerated and the liquid cannot be quickly led out, the internal hydraulic pressure increases, and the liquid enters the first flow channel 24 and impacts the concave arc surface of the sealing block 291, so that the pressure is transmitted through the sealing block 291. The sliding rod 292 compresses the second spring 298 and deforms it, causing the sliding rod 292 and the sealing block 291 to slide on the inner wall of the cavity 25, so that the sealing block 291 moves to open the through groove 27 between the first flow channel 24 and the second flow channel 28, so that the liquid can enter the second flow channel 28 from the first flow channel 24. At the same time, during the sliding of the sliding rod 292, the top plate 295 drives the sliding ring 293 to move, so that the through hole of the hole ring 294 is connected to the second flow channel 28, so that the diverted liquid can flow out from the through hole of the hole ring 294, and be diverted and discharged by the pressure relief interface 4, thereby reducing the pressure inside the valve body 1.

[0026] After the liquid screening mechanism 6 opens the gap and drives the cavity 25 to move, the cavity 25 and the filter ring 23 slide along the inner wall of the fixed ring 21, so that the filter ring 23 contacts the liquid introduced into the valve body 1, so that the liquid can pass through the filter hole of the filter ring 23 into the interior of the cavity 25. At the same time, after being filtered by the filter ring 23, large impurities in the liquid are removed. After entering the interior of the cavity, the fine impurities in the liquid are blocked by the filter cover 26. During the flow, the impurities are guided by the conical surface of the filter cover 26, so that they accumulate at one end of the cavity 25. At the same time, the liquid entering the first flow channel 24 accelerates the flow rate under the influence of the path change of the first flow channel 24 to impact the sealing block 291.

[0027] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A hydraulically triggered automatic reset hydraulic valve, characterized in that: include: A valve body (1), wherein a liquid inlet interface (3), a pressure relief interface (4) and a liquid outlet interface (5) are installed on the outside of the valve body (1), the liquid outlet interface (5) is installed at the center of the outside of the valve body (1), the liquid inlet interface (3) and the pressure relief interface (4) are installed on a side away from the liquid outlet interface (5) and are installed symmetrically with the liquid outlet interface (5) as the center, and a positioning ring (7) is fixedly connected to the side of the inner wall of the valve body (1) close to the pressure relief interface (4); A valve core (2), the valve core (2) is used to relieve pressure and divert flow when the hydraulic pressure increases, and the valve core (2) is installed inside the valve body (1); a liquid screening mechanism (6), the liquid screening mechanism (6) being used to filter the liquid discharged from the liquid outlet interface (5), and the liquid screening mechanism (6) being installed on the outside of the valve core (2); The valve core (2) comprises a cavity (25) and an adjusting assembly (29), the inner wall of the cavity (25) is provided with a first flow channel (24) and a second flow channel (28), a through groove (27) is provided between the first flow channel (24) and the second flow channel (28), the first flow channel (24) and the second flow channel (28) are communicated through the through groove (27), a filter ring (23) is fixedly mounted on the outer side of the cavity (25), the filter holes are symmetrically provided on the outer side of the filter ring (23), the end of the cavity (25) away from the positioning ring (7) is threadedly connected to a plug (22), the end of the first flow channel (24) away from the second flow channel (28) is fixedly connected to a filter cover (26), the outer side of the filter cover (26) is a conical surface and is evenly provided with filter holes, and the filter hole diameter of the filter ring (23) is larger than the filter hole diameter of the filter cover (26).

2. The hydraulically triggered automatic reset hydraulic valve according to claim 1, characterized in that: The first flow channel (24) is a tapered flow channel and its inner diameter gradually decreases as it moves away from the filter cover (26). The outer side of the cavity tube (25) is fixedly connected to the inner wall of the liquid screening mechanism (6). A fixing ring (21) is slidably mounted on the outer side of the filter ring (23), and the outer side of the fixing ring (21) is fixedly connected to the inner wall of the valve body (1).

3. The hydraulically triggered automatic reset hydraulic valve according to claim 1, characterized in that: The adjustment assembly (29) includes an outer cover tube (297), which is fixedly mounted on the outer side of the cavity tube (25) near the positioning ring (7), and the outer side of the outer cover tube (297) is slidably mounted on the inner wall of the positioning ring (7), and a hole ring (294) is fixedly mounted on the side of the outer cover tube (297) away from the positioning ring (7), and the outer side of the hole ring (294) is evenly provided with through holes, and the inner wall of the hole ring (294) is slidably mounted with a slip ring (293).

4. The hydraulically triggered automatic reset hydraulic valve according to claim 3, characterized in that: The inner wall of the slip ring (293) fits tightly with the outer side of the cavity tube (25), and a top plate (295) is fixedly installed on the side of the slip ring (293) close to the outer cover tube (297), the inner wall of the top plate (295) is slidably adapted to the inner wall of the cavity tube (25), and the inner wall of the top plate (295) is fixedly connected to a slide rod (292), and the outer side of the slide rod (292) is slidably adapted to the inner wall of the cavity tube (25).

5. The hydraulically triggered automatic reset hydraulic valve according to claim 4, characterized in that: A sealing block (291) is fixedly mounted on one end of the slide rod (292) away from the outer cover tube (297); a side of the sealing block (291) away from the slide rod (292) is an inwardly concave arc surface, and an outer side of the sealing block (291) is slidably adapted to the first flow channel (24) of the cavity tube (25).

6. The hydraulically triggered automatic reset hydraulic valve according to claim 5, characterized in that: A first spring (296) is installed on the side of the outer cover tube (297) away from the hole ring (294), and the end of the first spring (296) away from the outer cover tube (297) is fixedly connected to the inner wall of the valve body (1). The outer side of the outer cover tube (297) is slidably adapted to the inner wall of the positioning ring (7), and a second spring (298) is fixedly installed on the end of the slide rod (292) away from the sealing block (291).

7. The hydraulically triggered automatic reset hydraulic valve according to claim 1, characterized in that: The liquid screening mechanism (6) comprises a chuck (62) and a fixed disk (63), the outer sides of the fixed disk (63) and the chuck (62) are fixedly connected to the inner wall of the valve body (1), the inner wall of the fixed disk (63) is slidably fitted with the outer side of the cavity (25), and a slot is provided on the outer side of the chuck (62).

8. The hydraulically triggered automatic reset hydraulic valve according to claim 7, characterized in that: The side of the chuck (62) close to the fixed disk (63) is clamped with a sealing disk (61), and a clamping block (65) is fixedly installed on the outer side of the sealing disk (61). The clamping blocks (65) are evenly installed along the center position of the sealing disk (61), and a concave annular groove is provided on the side of the sealing disk (61) away from the fixed disk (63).

9. The hydraulically triggered automatic reset hydraulic valve according to claim 8, characterized in that: A connecting disk (66) is fixedly mounted on one side of the sealing disk (61) close to the fixed disk (63), and the inner wall of the connecting disk (66) is fixedly connected to the outer side of the cavity tube (25). The inner wall of the sealing disk (61) is tightly fitted to the outer side of the cavity tube (25).

10. The hydraulically triggered automatic reset hydraulic valve according to claim 8, characterized in that: Side sieve rings (67) are fixedly mounted on opposite surfaces of the fixed disk (63) and the chuck (62), sieve holes are evenly provided on the outside of the side sieve rings (67), and an arc-shaped sieve cover (64) is fixedly mounted between the side sieve rings (67), the center position of the arc-shaped sieve cover (64) is convex outward and sieve grooves are evenly provided on the outside.

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