High-pressure and high-performance fluid distribution valve based on spline valve element and control method of high-pressure and high-performance fluid distribution valve

Abstract

The invention relates to the technical field of circulation distribution valves, in particular to a high-pressure and high-performance fluid distribution valve based on a spline valve element and a control method of the high-pressure and high-performance fluid distribution valve. The valve comprises a valve seat, fluid channels used for being connected with a conveying system pipeline are integrally arranged on the two sides, away from each other, of the valve seat, a sealing groove is formed in the valve seat, a valve plate is connected into the sealing groove in an up-down sliding mode, and the sectional area of the sealing groove is larger than that of the fluid channels; when the two fluid channels are in a communicating state and fluid passes through the bottom of the valve plate, the flowing acting force of the fluid acts on the inclined face of the bottom of the buffer block, the buffer block slides upwards under thrust, the inserting block slides into the inserting groove, and the multiple second springs are compressed to store elastic potential energy; therefore, part of energy, acting on the bottom of the valve plate, of high-pressure fluid is converted into elastic potential energy of the second spring, and the direct acting force of the fluid on the valve plate is weakened.

Description

Technical Field

[0001] The present invention relates to the technical field of circulation distribution valves, and in particular to a high-pressure and high-performance fluid distribution valve based on a spline valve core and a control method thereof. Background Art

[0002] Fluid distribution valves are core components in fluid delivery systems that enable precise diversion, flow control, and operating mode switching. In the chemical and petroleum industries, these valves deliver high-temperature, high-pressure slurry to the reactor nozzles in varying proportions, ensuring efficient contact between the catalyst and the feedstock. When the delivery system transports particulate-laden fluids, such as fracturing fluids and sand-laden crude oil, the particles can accumulate at the bottom of the sealing groove over time, compromising the sealing performance of the distribution valve. Furthermore, the particles can erode the sealing surface of the valve plate over time, compromising the sealing performance of the contact surface between the valve plate and the valve seat.

[0003] To address this issue, existing fluid distribution valves typically weld wear-resistant material onto the upstream side of the valve disc to prevent the long-term erosion of particulate matter. Particles deposited at the bottom of the valve seat sealing groove require periodic shutdown of the entire delivery system for cleaning. However, while wear-resistant material can extend the life of the valve disc to a certain extent, the valve disc is still directly corroded by particulate matter in the high-pressure fluid. Therefore, the extended service life of the valve disc is still limited, and the entire delivery system still needs to be regularly shut down for maintenance and replacement of the valve disc.

[0004] In view of this, we propose a high-pressure and high-performance fluid distribution valve based on a spline valve core and a control method thereof to improve the deficiencies in the existing technology. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a high-pressure, high-performance fluid distribution valve based on a spline valve core, which solves the problem that although welding wear-resistant materials on the upstream side of the valve plate can extend the service life of the valve plate to a certain extent, the valve plate is still directly corroded by particles in the high-pressure fluid, that is:

[0006] The extension of the service life of the valve plate by surfacing wear-resistant materials is still limited, and the entire conveying system still needs to be shut down regularly to maintain and replace the valve plate.

[0007] To achieve the above-mentioned purpose, the high-pressure, high-performance fluid distribution valve based on the spline valve core includes a valve seat, and the two sides of the valve seat that are separated from each other are integrally provided with a fluid channel for connecting to the pipeline of the delivery system. A sealing groove is provided inside the valve seat, and a valve plate is connected to the sealing groove in an up-and-down sliding manner. The cross-sectional area of ​​the sealing groove is larger than the cross-sectional area of ​​the fluid channel. A filling component is horizontally slidably connected to the upstream side of the bottom of the sealing groove, and a buffer component is vertically slidably connected to the downstream side of the bottom of the valve plate. The height of the lowest point of the buffer component is lower than the height of the lowest point of the valve plate.

[0008] When the two fluid channels are in a connected state, the filling assembly is used to fill the bottom space of the sealing groove to reduce the deposition of particles in the fluid at the bottom of the sealing groove, thereby preventing the sealing performance of the valve plate and the valve seat from being affected by the particles deposited at the bottom of the sealing groove. The buffer assembly is pushed upward by the fluid to reduce the flow rate of the fluid when passing near the bottom of the valve plate, thereby reducing the erosion effect of particles in the fluid on the valve plate.

[0009] When the connection between the two fluid channels needs to be cut off by the valve plate, the valve plate is driven to slide down by the lifting assembly. When the valve plate slides down to the point where its bottom is flush with the lowest point of the fluid channel, the flow between the two fluid channels is cut off by the valve plate, and the fluid no longer causes erosion to the buffer assembly, so the buffer assembly returns to its natural state, that is, its bottom height is lower than the height of the bottom of the valve plate. As the valve plate drives the buffer assembly to continue to slide down, after the buffer assembly contacts the filling assembly, the buffer assembly pushes the filling assembly to slide toward the upstream side of the valve seat, so that the particles deposited on the top of the filling assembly are scraped off by the valve seat and fall onto the inclined surface opened on the downstream side of the filling assembly, and are finally scraped off by the bottom of the buffer assembly and discharged from the sealing groove.

[0010] In the above technical solution, the sealing groove is provided with a first mounting groove on the upstream side of the valve seat, and the first mounting groove is used to install the filling assembly. The downstream side of the sealing groove is provided with a slag discharge groove. When the two fluid channels are in a connected state, that is, the bottom of the valve plate is above the highest point of the fluid channel, the filling assembly is located in the sealing groove and the slag discharge groove. When the connected state of the two fluid channels is cut off, that is, the two fluid channels are cut off by the valve plate, the filling assembly is squeezed into the first mounting groove by the buffer assembly.

[0011] The improvement is that a plurality of flushing holes for flushing the slag discharge trough are opened on the top of the slag discharge trough, and the flushing holes connect the slag discharge trough with the outside world, so as to flush the particles inside the slag discharge trough when the two fluid channels are cut off.

[0012] In another technical solution, the lifting assembly includes a spline tooth fixedly connected to the top of the valve plate, a ball screw is fixedly connected to the top of the spline tooth, the ball screw is engaged with the spline tooth through a spline groove opened at the bottom, and the ball screw is driven by a motor.

[0013] Not only that, a first gear is provided on the periphery of the ball screw, the inner ring of the first gear is provided with a thread matching the ball screw, the first gear is rotatably connected to the valve seat, a second gear is engaged with one side of the first gear, the second gear is coaxially connected to the output shaft of the motor, and a plurality of guide rods are fixedly connected to the top of the valve plate for maintaining stability when the valve plate is raised and lowered.

[0014] In the above scheme, the filling assembly includes a filling block slidably connected to the first mounting groove, the downstream side of the filling block is provided with a slope, the upper half of the slope of the filling block is provided with a lower row of grooves, and the side of the filling block close to the first mounting groove is provided with an elastic member for resetting the horizontally moving filling block.

[0015] Furthermore, the elastic member includes a sliding rod fixedly connected to the filling block, one end of the sliding rod away from the filling block is slidably connected to the valve seat, and a first spring is sleeved on the periphery of the sliding rod between the filling block and the side wall of the first mounting groove.

[0016] Based on the above technical solution, the buffer assembly includes a buffer block, the two ends of the buffer block are fixedly connected to limit blocks that are slidably connected to the side walls of the valve plate, the top of the buffer block is fixedly connected to an insert block, the length and width of the insert block are both smaller than the length and width of the top of the buffer block, and an inclined surface is provided on the upstream side of the bottom of the buffer block, and a plurality of upper row grooves are provided on the inclined surface of the buffer block, and each of the upper row grooves corresponds to each lower row groove.

[0017] Furthermore, the buffer assembly also includes 40 opened on the downstream side of the bottom of the valve plate, the buffer block is slidably connected to the second mounting groove, the top of the second mounting groove is provided with a slot with a smaller cross-sectional area than the second mounting groove, the plug block is slidably connected to the slot, the top of the plug block is fixedly connected with a plurality of telescopic rods, the telescopic rods are slidably connected to the valve plate, and the outer periphery of each of the telescopic rods is provided with a second spring between the top of the plug block and the inner top wall of the slot, and the second spring is used to reset the rising buffer block.

[0018] A second object of the present invention is to provide a control method for a high-pressure, high-performance fluid distribution valve based on a spline valve core, comprising the following steps:

[0019] S1. When the two fluid channels are in a connected state, the bottom space of the sealing groove is filled with the filling block. When the two fluid channels are blocked by the valve plate, during the process of the filling block being squeezed into the first installation groove by the buffer block, a small amount of particles falling on the top of the filling block are scraped off by the valve seat and gradually fall onto the inclined surface on the downstream side of the filling block, and finally scraped off by the inclined surface on the bottom of the buffer block into the slag discharge groove;

[0020] S2. When the connection state of the two fluid channels needs to be changed, the second gear drives the first gear meshing with it to rotate, and the first gear drives the ball screw to rise and fall inside it, so that the valve plate rises and falls in the sealing groove along with the ball screw;

[0021] S3. When the two fluid channels are in a connected state, the filling block naturally extends from the first installation groove, blocking the slag discharge groove. When the connection between the two fluid channels needs to be cut off, the descending valve plate drives the buffer assembly to push the filling block back into the first installation groove. Particles falling on the top of the filling block are scraped off by the upper wall of the first installation groove and gradually fall into the lower discharge groove of the downstream inclined surface of the filling block. Then, as the buffer block continues to move downward, the particles follow the fluid and flow along the inclined surface at the bottom of the buffer block into the slag discharge groove.

[0022] S4. When the two fluid channels are in a connected state, when the fluid passes through the bottom of the valve plate, the buffer block slides upward by the thrust, and the plug block slides into the inside of the slot. The multiple second springs are compressed to store elastic potential energy. When the fluid flows near the bottom of the valve plate, the flow rate will decrease. The bottom inclined surface of the buffer block contacts the downstream inclined surface of the filling block, pushing the filling block back into the first installation groove. The particulate matter remaining in the lower row of grooves will transition to the upper row of grooves along with the fluid, and then flow from the upper row of grooves along the inclined surface on the downstream side of the filling block to the slag discharge groove.

[0023] Based on the above description, it can be seen that compared with the prior art, the beneficial effects of the present invention are:

[0024] When the two fluid channels are in a connected state, when the fluid passes through the bottom of the valve plate, the flow force of the fluid acts on the inclined surface at the bottom of the buffer block. The buffer block slides upward under the thrust, and the insert slides into the slot. The multiple second springs are compressed to store elastic potential energy, so part of the energy of the high-pressure fluid acting on the bottom of the valve plate is converted into the elastic potential energy of the second spring, so that the direct force of the fluid on the valve plate will be weakened. At the same time, due to the blocking effect of the buffer block, the flow velocity of the fluid will be reduced when it flows near the bottom of the valve plate, thereby further weakening the erosion effect of the fluid on the valve plate.

[0025] In addition, in the process of the buffer block sliding downward following the valve plate, the bottom inclined surface of the buffer block contacts the inclined surface on the downstream side of the filling block, pushing the filling block back into the first installation groove. During this period, the inclined surface of the buffer block and the inclined surface of the filling block slide relative to each other, and the vertical position of the upper row groove and the lower row groove gradually changes from overlapping to the upper row groove being lower than the height of the lower row groove. Therefore, the particles retained in the lower row groove transition to the upper row groove together with the fluid, and then flow from the upper row groove along the inclined surface on the downstream side of the filling block to the slag discharge groove. Finally, the particles in the slag discharge groove are flushed out of the sealing groove by injecting cleaning fluid from the flushing hole, avoiding the need to shut down the entire fluid delivery system when cleaning the deposited particles in the sealing groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0028] Figure 2 It is a partially cutaway perspective view of the present invention;

[0029] Figure 3 It is a partially cutaway front view of the present invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 It is a cutaway front view of the valve seat of the present invention;

[0032] Figure 6 is a cutaway perspective view of the lifting assembly of the present invention;

[0033] Figure 7 is a cutaway perspective view of a filling assembly of the present invention;

[0034] Figure 8 is a cutaway front view of a filling assembly of the present invention;

[0035] Figure 9 For the present invention Figure 8 Enlarged view of point B in the middle;

[0036] Figure 10 This is one of the structural perspective views of the buffer assembly of the present invention;

[0037] Figure 11 This is the second structural perspective view of the buffer assembly of the present invention;

[0038] Figure 12is a front view of a cutaway portion of the buffer assembly of the present invention;

[0039] Figure 13 It is a cutaway left side view of the buffer assembly of the present invention;

[0040] Figure 14 This is the second sectional front view of the buffer assembly of the present invention.

[0041] The meaning of each number in the figure is:

[0042] 100, valve seat; 110, valve plate; 120, fluid channel; 130, sealing groove; 131, first mounting groove; 132, slag discharge groove; 133, flushing hole;

[0043] 200, lifting assembly; 210, spline teeth; 220, ball screw; 230, guide rod; 240, first gear; 241, second gear;

[0044] 300, filling assembly; 310, filling block; 311, lower row of grooves; 320, elastic member; 321, slide rod; 322, first spring;

[0045] 400, buffer assembly; 410, buffer block; 411, upper row of slots; 420, limit block; 430, insert block; 440, second installation slot; 450, slot; 460, telescopic rod; 470, second spring. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] Example 1: Please refer to Figure 1-Figure 4 Although surfacing wear-resistant materials on the upstream side of the valve plate can extend the service life of the valve plate to a certain extent, the valve plate is still directly eroded by particles in the high-pressure fluid. The extension of the service life of the valve plate by surfacing wear-resistant materials is still limited. It is still necessary to regularly shut down the entire conveying system to maintain and replace the valve plate.

[0048] The present embodiment aims to provide a high-pressure, high-performance fluid distribution valve based on a spline valve core, comprising a valve seat 100. Fluid channels 120 for connecting to a delivery system pipeline are integrally provided on two opposing sides of the valve seat 100. A sealing groove 130 is defined within the valve seat 100. A valve plate 110 is slidably connected up and down within the sealing groove 130. The cross-sectional area of ​​the sealing groove 130 is larger than that of the fluid channel 120. A filling assembly 300 is horizontally slidably connected to the upstream side of the bottom of the sealing groove 130. A buffer assembly 400 is vertically slidably connected to the downstream side of the bottom of the valve plate 110. The lowest point of the buffer assembly 400 is lower than the lowest point of the valve plate 110.

[0049] When the two fluid channels 120 are in a connected state, the filling assembly 300 is used to fill the bottom space of the sealing groove 130 to reduce the deposition of particles in the fluid at the bottom of the sealing groove 130, thereby preventing the sealing between the valve plate 110 and the valve seat 100 from being affected by the particles deposited at the bottom of the sealing groove 130. The buffer assembly 400 is pushed upward by the fluid to reduce the flow rate of the fluid near the bottom of the valve plate 110, thereby reducing the erosion effect of particles in the fluid on the valve plate 110.

[0050] When the connection between the two fluid channels 120 needs to be cut off by the valve plate 110, the valve plate 110 is driven down by the lifting assembly 200. When the valve plate 110 slides down to the point where its bottom is flush with the lowest point of the fluid channel 120, the flow between the two fluid channels 120 is cut off by the valve plate 110, and the fluid no longer causes erosion to the buffer assembly 400, so the buffer assembly 400 returns to its natural state, that is, its bottom height is lower than the height of the bottom of the valve plate 110. As the valve plate 110 drives the buffer assembly 400 to continue to slide down, after the buffer assembly 400 contacts the filling assembly 300, the buffer assembly 400 pushes the filling assembly 300 to slide toward the upstream side of the valve seat 100, so the particles deposited on the top of the filling assembly 300 are scraped off by the valve seat 100 and fall onto the inclined surface opened on the downstream side of the filling assembly 300, and are finally scraped off by the bottom of the buffer assembly 400 and discharged from the sealing groove 130.

[0051] Working Principle: When the two fluid channels 120 of the valve seat 100 are in a connected state, the bottom space of the sealing groove 130 is filled with the filling component 300 to reduce the deposition of particles in the fluid at the bottom of the sealing groove 130, thereby preventing the sealing between the valve plate 110 and the valve seat 100 from being affected by the particles deposited at the bottom of the sealing groove 130. The buffer component 400 is pushed upward by the fluid, reducing the flow rate of the fluid near the bottom of the valve plate 110, thereby reducing the erosion of the valve plate 110 by particles in the fluid.

[0052] When the connection between the two fluid channels 120 needs to be cut off by the valve plate 110, the valve plate 110 is driven to slide down by the lifting assembly 200. When the valve plate 110 slides down to the point where its bottom is flush with the lowest point of the fluid channel 120, the flow between the two fluid channels 120 is cut off by the valve plate 110, and the fluid no longer causes erosion on the buffer assembly 400, so the buffer assembly 400 returns to its natural state. As the valve plate 110 drives the buffer assembly 400 to continue to slide down, after the buffer assembly 400 contacts the filling assembly 300, the buffer assembly 400 pushes the filling assembly 300 to slide toward the upstream side of the valve seat 100, so the particles deposited on the top of the filling assembly 300 are scraped off by the valve seat 100 and fall onto the inclined surface opened on the downstream side of the filling assembly 300, and are finally scraped off by the bottom of the buffer assembly 400 and discharged from the sealing groove 130.

[0053] like Figure 5 As shown, the sealing groove 130 is provided with a first mounting groove 131 on the upstream side of the valve seat 100, and the first mounting groove 131 is used to install the filling assembly 300. A slag discharge groove 132 is provided on the downstream side of the sealing groove 130. When the two fluid channels 120 are in a connected state, that is, the bottom of the valve plate 110 is located above the highest point of the fluid channel 120, the filling assembly 300 is located in the sealing groove 130 and the slag discharge groove 132. When the connected state of the two fluid channels 120 is cut off, that is, the two fluid channels 120 are cut off by the valve plate 110, the filling assembly 300 is squeezed into the first mounting groove 131 by the buffer assembly 400.

[0054] The improvement is that a plurality of flushing holes 133 for flushing the slag discharge trough 132 are opened on the top of the slag discharge trough 132, and the flushing holes 133 connect the slag discharge trough 132 with the outside world, so as to flush the particles inside the slag discharge trough 132 when the two fluid channels 120 are cut off.

[0055] During implementation, when the two fluid channels 120 are in a connected state, high-pressure fluid flows through the valve seat 100. As the circulation time increases, the particles carried in the fluid will gradually gather at the bottom of the sealing groove 130. However, at this time, the bottom space of the sealing groove 130 is filled by the filling component 300, so only a small amount of particles gather at the top of the filling component 300. When the two fluid channels 120 are cut off by the valve plate 110, in the process of the filling component 300 being squeezed into the first installation groove 131 by the buffer component 400, a small amount of particles falling on the top of the filling component 300 are scraped off by the valve seat 100 and gradually fall onto the inclined surface opened on the downstream side of the filling component 300, and finally scraped off by the inclined surface opened at the bottom of the buffer component 400 into the slag discharge groove 132, and finally cleaning liquid is poured into the slag discharge groove 132 through the flushing hole 133, thereby removing the particles in the slag discharge groove 132.

[0056] exist Figure 6In the figure, the lifting assembly 200 includes a spline tooth 210 fixedly connected to the top of the valve plate 110, and a ball screw 220 is fixedly connected to the top of the spline tooth 210. The ball screw 220 is engaged with the spline tooth 210 through a spline groove opened at the bottom, and the ball screw 220 is driven by a motor.

[0057] Not only that, a first gear 240 is provided on the periphery of the ball screw 220, and a thread matching the ball screw 220 is provided on the inner ring of the first gear 240. The first gear 240 is rotatably connected to the valve seat 100. A second gear 241 is engaged with one side of the first gear 240, and the second gear 241 is coaxially connected to the output shaft of the motor. A plurality of guide rods 230 are fixedly connected to the top of the valve plate 110 for maintaining the stability of the valve plate 110 when it is raised and lowered.

[0058] It should be noted that when the connection state of the two fluid channels 120 needs to be changed, that is, the position of the valve plate 110 in the sealing groove 130 needs to be changed, the starting motor drives the second gear 241 to rotate, and the second gear 241 drives the first gear 240 meshing with it to rotate, and the first gear 240 drives the ball screw 220 to rise and fall therein, and the ball screw 220 and the spline teeth 210 can be fixed by structures such as pins, so that the valve plate 110 follows the ball screw 220 to rise and fall in the sealing groove 130, thereby changing the connection state of the two fluid channels 120 of the valve seat 100.

[0059] Next, through Figure 7-Figure 9 The specific structure of the filling assembly 300 is disclosed. The filling assembly 300 includes a filling block 310 that is slidably connected to the first mounting groove 131. A slope is provided on the downstream side of the filling block 310. A lower row of grooves 311 is provided on the upper half of the slope of the filling block 310. An elastic member 320 is provided on the side of the filling block 310 close to the first mounting groove 131 for resetting the horizontally moving filling block 310.

[0060] Furthermore, the elastic member 320 includes a sliding rod 321 fixedly connected to the filling block 310, and one end of the sliding rod 321 away from the filling block 310 is slidably connected to the valve seat 100. The outer periphery of the sliding rod 321 is provided with a first spring 322 between the filling block 310 and the side wall of the first mounting groove 131.

[0061] That is to say, when the two fluid channels 120 are in a connected state, the filling block 310 is in a natural state and extends out from the first mounting groove 131, that is, the filling block 310 fills the bottom space of the sealing groove 130 and blocks the slag discharge groove 132 at the same time, preventing the particles carried in the circulation from accumulating in large quantities in the sealing groove 130. Only a small amount of particles gather at the top of the filling block 310. When it is necessary to cut off the connection between the two fluid channels 120, the valve plate 110 is lowered to block the fluid channel 120. The lowered valve plate 110 drives the buffer assembly 400 to push the filling block 310 back into the first mounting groove 131. In the above process, the particles originally falling on the top of the filling block 310 are scraped off by the upper wall of the first mounting groove 131 and gradually fall into the lower discharge groove 311 on the downstream inclined surface of the filling block 310. Then, as the buffer assembly 400 continues to move downward, the particles follow the fluid and flow along the inclined surface at the bottom of the buffer assembly 400 to the slag discharge groove 132.

[0062] Based on the above description, the following Figure 10 and Figure 14 To explain the preferred effect of the buffer assembly 400, the buffer assembly 400 includes a buffer block 410, and the two ends of the buffer block 410 away from each other are fixedly connected to limit blocks 420 that are slidably connected to the side walls of the valve plate 110. The top of the buffer block 410 is fixedly connected to an insert block 430, and the length and width of the insert block 430 are both smaller than the length and width of the top of the buffer block 410. The bottom upstream side of the buffer block 410 is provided with an inclined surface, and a plurality of upper grooves 411 are provided on the inclined surface of the buffer block 410, and each upper groove 411 corresponds to each lower groove 311.

[0063] Furthermore, the buffer assembly 400 also includes 40 opened on the downstream side of the bottom of the valve plate 110, the buffer block 410 is slidably connected to the second mounting groove 440, the top of the second mounting groove 440 is provided with a slot 450 with a smaller cross-sectional area than the second mounting groove 440, the plug block 430 is slidably connected to the slot 450, and a plurality of telescopic rods 460 are fixedly connected to the top of the plug block 430, the telescopic rods 460 are slidably connected to the valve plate 110, and the outer periphery of each telescopic rod 460 is sleeved with a second spring 470 between the top of the plug block 430 and the inner top wall of the slot 450, and the second spring 470 is used to reset the rising buffer block 410.

[0064] During operation of the above structure, when the two fluid channels 120 are in a connected state, if the buffer block 410 is not provided on the downstream side of the valve plate 110, the high-pressure fluid carrying particulate matter will directly flush the upstream side of the valve plate 110, thereby eroding the valve plate 110, thereby affecting the sealing between the valve plate 110 and the inner wall of the sealing groove 130. When the buffer block 410 is provided on the downstream side of the valve plate 110, when the fluid passes through the bottom of the valve plate 110, the flow force of the fluid acts on the inclined surface of the bottom of the buffer block 410. On the surface, the buffer block 410 slides upward under the thrust, and the insert block 430 slides into the inside of the slot 450. The multiple second springs 470 are compressed to store elastic potential energy, so part of the energy of the high-pressure fluid acting on the bottom of the valve plate 110 is converted into the elastic potential energy of the second spring 470, so that the direct force of the fluid on the valve plate 110 will be weakened. At the same time, due to the blocking effect of the buffer block 410, the flow velocity of the fluid will be reduced when flowing near the bottom of the valve plate 110, thereby further weakening the erosion of the fluid on the valve plate 110.

[0065] In addition, in the process of the buffer block 410 sliding downward following the valve plate 110, the bottom inclined surface of the buffer block 410 contacts the downstream inclined surface of the filling block 310, pushing the filling block 310 back into the first mounting groove 131. During this period, the inclined surface of the buffer block 410 and the inclined surface of the filling block 310 slide relative to each other, and the vertical positions of the upper row groove 411 and the lower row groove 311 gradually change from overlapping to the height of the upper row groove 411 lower than the lower row groove 311. Therefore, the particulate matter retained in the lower row groove 311 transitions to the upper row groove 411 together with the fluid, and then flows from the upper row groove 411 along the inclined surface on the downstream side of the filling block 310 to the slag discharge groove 132, and finally the particulate matter in the slag discharge groove 132 is flushed out of the sealing groove 130 by injecting cleaning fluid from the flushing hole 133.

[0066] Example 2: This example is based on the content provided in Example 1, and aims to provide a control method for a high-pressure, high-performance fluid distribution valve based on a spline valve core. The specific steps are as follows:

[0067] S1. When the two fluid channels 120 are in a connected state, high-pressure fluid flows through the valve seat 100. As the flow time increases, the particles carried in the fluid will gradually gather at the bottom of the sealing groove 130. However, at this time, the bottom space of the sealing groove 130 is filled by the filling block 310, so only a small amount of particles gather on the top of the filling block 310. When the two fluid channels 120 are cut off by the valve plate 110, in the process of the filling block 310 being squeezed into the first installation groove 131 by the buffer block 410, the small amount of particles falling on the top of the filling block 310 are scraped off by the valve seat 100 and gradually fall onto the inclined surface opened on the downstream side of the filling block 310. Finally, they are scraped off by the inclined surface opened at the bottom of the buffer block 410 into the slag discharge groove 132. Finally, cleaning liquid is poured into the slag discharge groove 132 through the flushing hole 133, thereby removing the particles in the slag discharge groove 132.

[0068] S2. When the connection state of the two fluid channels 120 needs to be changed, that is, when the position of the valve plate 110 in the sealing groove 130 needs to be changed, the motor is started to rotate the second gear 241, which in turn rotates the first gear 240 meshing therewith. The first gear 240 drives the ball screw 220 to rise and fall therein. The ball screw 220 and the spline teeth 210 can be fixed by a structure such as a latch. As a result, the valve plate 110 follows the ball screw 220 to rise and fall within the sealing groove 130, thereby changing the connection state of the two fluid channels 120 of the valve seat 100.

[0069] S3. When the two fluid channels 120 are in a connected state, the filling block 310 is in a natural state and extends out from the first installation groove 131, that is, the filling block 310 fills the bottom space of the sealing groove 130 and blocks the slag discharge groove 132 at the same time, preventing the particles carried in the circulation from accumulating in large quantities in the sealing groove 130. Only a small amount of particles gather at the top of the filling block 310. When the connected state of the two fluid channels 120 needs to be cut off, the valve plate 110 is lowered to block the fluid channel 120. The lowered valve plate 110 drives the buffer assembly 400 to push the filling block 310 back into the first installation groove 131. In the above process, the particles originally falling on the top of the filling block 310 are scraped off by the upper wall of the first installation groove 131 and gradually fall into the lower discharge groove 311 of the downstream inclined surface of the filling block 310. Then, as the buffer block 410 continues to move downward, the particles follow the fluid and flow along the inclined surface at the bottom of the buffer block 410 to the slag discharge groove 132.

[0070] S4. When the two fluid channels 120 are in a connected state, when the fluid passes through the bottom of the valve plate 110, the flow force of the fluid acts on the inclined surface at the bottom of the buffer block 410, and the buffer block 410 slides upward under the thrust, and the insert block 430 slides into the inside of the slot 450. The multiple second springs 470 are all compressed to store elastic potential energy, so part of the energy of the high-pressure fluid acting on the bottom of the valve plate 110 is converted into the elastic potential energy of the second spring 470, so that the direct force of the fluid on the valve plate 110 will be weakened. At the same time, due to the blocking effect of the buffer block 410, the flow velocity of the fluid will be reduced when flowing near the bottom of the valve plate 110, thereby further weakening the erosion of the fluid on the valve plate 110.

[0071] In addition, in the process of the buffer block 410 sliding downward following the valve plate 110, the bottom inclined surface of the buffer block 410 contacts the downstream inclined surface of the filling block 310, pushing the filling block 310 back into the first mounting groove 131. During this period, the inclined surface of the buffer block 410 and the inclined surface of the filling block 310 slide relative to each other, and the vertical positions of the upper row groove 411 and the lower row groove 311 gradually change from overlapping to the height of the upper row groove 411 lower than the lower row groove 311. Therefore, the particulate matter retained in the lower row groove 311 transitions to the upper row groove 411 together with the fluid, and then flows from the upper row groove 411 along the inclined surface on the downstream side of the filling block 310 to the slag discharge groove 132, and finally the particulate matter in the slag discharge groove 132 is flushed out of the sealing groove 130 by injecting cleaning fluid from the flushing hole 133.

[0072] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure, high-performance fluid distribution valve based on a spline valve core, comprising a valve seat (100), wherein two sides of the valve seat (100) are provided with fluid channels (120), a sealing groove (130) is provided inside the valve seat (100), a valve plate (110) is provided in the sealing groove (130), a filling assembly (300) is horizontally slidably connected to the upstream side of the bottom of the sealing groove (130), a buffer assembly (400) is vertically slidably connected to the downstream side of the bottom of the valve plate (110), and a lifting assembly (200) is provided on the top of the valve plate (110), characterized in that: When the two fluid channels (120) are in a connected state, the filling assembly (300) is located at the bottom of the sealing groove (130), and the buffer assembly (400) is pushed upward by the fluid to reduce the flow rate of the fluid when passing near the bottom of the valve plate (110); When the two fluid channels (120) need to be cut off, when the valve plate (110) slides down to the point where its bottom is flush with the lowest point of the fluid channel (120), the bottom height is lower than the height of the bottom of the valve plate (110), and after the buffer component (400) contacts the filling component (300), the buffer component (400) pushes the filling component (300) to slide toward the upstream side of the valve seat (100), and the particles deposited on the top of the filling component (300) are scraped by the valve seat (100) onto the inclined surface opened on the downstream side of the filling component (300).

2. The high-pressure, high-performance fluid distribution valve based on a spline valve core according to claim 1, characterized in that: The sealing groove (130) is provided with a first installation groove (131) on the upstream side of the valve seat (100), and the first installation groove (131) is used to install the filling assembly (300). The downstream side of the sealing groove (130) is provided with a slag discharge groove (132). When the two fluid channels (120) are in a connected state, that is, the bottom of the valve plate (110) is located above the highest point of the fluid channel (120), the filling assembly (300) is located in the sealing groove (130) and the slag discharge groove (132). When the connected state of the two fluid channels (120) is cut off, that is, the two fluid channels (120) are cut off by the valve plate (110), the filling assembly (300) is squeezed into the first installation groove (131) by the buffer assembly (400).

3. The high-pressure, high-performance fluid distribution valve based on a spline valve core according to claim 2, characterized in that: A plurality of flushing holes (133) for flushing the slag discharge trough (132) are provided on the top of the slag discharge trough (132). The flushing holes (133) connect the slag discharge trough (132) with the outside world, so as to flush the particles inside the slag discharge trough (132) when the two fluid channels (120) are cut off.

4. The high-pressure, high-performance fluid distribution valve based on a spline valve core according to claim 1, characterized in that: The lifting assembly (200) comprises a spline tooth (210) fixedly connected to the top of the valve plate (110), and a ball screw (220) is fixedly connected to the top of the spline tooth (210).

5. The high-pressure, high-performance fluid distribution valve based on a spline valve core according to claim 4, characterized in that: A first gear (240) is provided on the periphery of the ball screw (220), and a thread matching the ball screw (220) is provided on the inner ring of the first gear (240). The first gear (240) is rotatably connected to the valve seat (100), and a second gear (241) is meshed on one side of the first gear (240). A plurality of guide rods (230) for maintaining the stability of the valve plate (110) when it is raised or lowered are fixedly connected to the top of the valve plate (110).

6. The high-pressure, high-performance fluid distribution valve based on a spline valve core according to claim 1, characterized in that: The filling assembly (300) comprises a filling block (310) slidably connected to the first mounting groove (131); a downstream side of the filling block (310) is provided with an inclined surface; an upper half portion of the inclined surface of the filling block (310) is provided with a lower row of grooves (311); and a side of the filling block (310) close to the first mounting groove (131) is provided with an elastic member (320) for resetting the horizontally moving filling block (310).

7. The high-pressure, high-performance fluid distribution valve based on a spline valve core according to claim 6, characterized in that: The elastic member (320) includes a sliding rod (321) fixedly connected to the filling block (310), and one end of the sliding rod (321) away from the filling block (310) is slidably connected to the valve seat (100), and a first spring (322) is sleeved on the periphery of the sliding rod (321) between the filling block (310) and the side wall of the first mounting groove (131).

8. The high-pressure, high-performance fluid distribution valve based on a spline valve core according to claim 6, characterized in that: The buffer assembly (400) includes a buffer block (410), two ends of the buffer block (410) away from each other are fixedly connected to limit blocks (420) that are slidably connected to the side wall of the valve plate (110), the top of the buffer block (410) is fixedly connected to an insert block (430), the length and width of the insert block (430) are both smaller than the length and width of the top of the buffer block (410), the bottom upstream side of the buffer block (410) is provided with an inclined surface, and a plurality of upper grooves (411) are provided on the inclined surface of the buffer block (410), and each of the upper grooves (411) corresponds to each lower groove (311).

9. The high-pressure, high-performance fluid distribution valve based on a spline valve core according to claim 8, characterized in that: The buffer assembly (400) further includes a 40 provided on the downstream side of the bottom of the valve plate (110), the buffer block (410) is slidably connected to the second mounting groove (440), the top of the second mounting groove (440) is provided with a slot (450) having a cross-sectional area smaller than that of the second mounting groove (440), the plug block (430) is slidably connected to the slot (450), the top of the plug block (430) is fixedly connected with a plurality of telescopic rods (460), the telescopic rods (460) are slidably connected to the valve plate (110), and the periphery of each telescopic rod (460) is provided with a second spring (470) between the top of the plug block (430) and the inner top wall of the slot (450), and the second spring (470) is used to reset the rising buffer block (410).

10. A control method for a high-pressure, high-performance fluid distribution valve based on a spline valve core according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When the two fluid channels (120) are in a connected state, the bottom space of the sealing groove (130) is filled by the filling component (300). When the two fluid channels (120) are cut off by the valve plate (110), during the process of the filling component (300) being compressed by the buffer component (400), a small amount of particles falling on the top of the filling component (300) are scraped off by the valve seat (100) and gradually fall onto the inclined surface opened on the downstream side of the filling component (300). S2. When the connection state of the two fluid channels (120) needs to be changed, the lifting assembly (200) drives the valve plate (110) to rise and fall in the sealing groove (130); S3. When the two fluid channels (120) are in a connected state, the filling component (300) fills the bottom space of the sealing groove (130). When the connected state of the two fluid channels (120) needs to be cut off, the descending valve plate (110) drives the buffer component (400) to squeeze the filling component (300) out of the sealing groove (130). Particles falling on the top of the filling component (300) are scraped off by the valve seat (100) and transferred out of the sealing groove (130) through the inclined surface provided at the bottom of the buffer component (400); S4. When the two fluid channels (120) are in a connected state, when the fluid passes through the bottom of the valve plate (110), the bottom inclined surface of the buffer component (400) is pushed upward, thereby reducing the flow rate when passing near the valve plate (110). During the process of the bottom inclined surface of the buffer component (400) and the filling component (300) contacting each other, the particles located on the inclined surface of the filling component (300) are transferred through the bottom inclined surface of the buffer component (400) and flow out from the bottom of the sealing groove (130) along with the fluid.

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