Fracturing gate valve with sand screen

Abstract

The application discloses a fracturing gate valve with a sand filtering ring and belongs to the field of shale oil and gas exploitation equipment. The device comprises a valve body, two flow channel pipes fixedly connected to the valve body and symmetrically arranged on the two sides of the valve body, and a mounting disc fixedly connected to the flow channel pipe. The valve seat on the valve body is adhered to the valve block under the action of the reverse push spring and the moving column, so that the flowing fracturing fluid cannot seep out of the flow channel pipe and the flow-through hole of the valve block. Thus, the fracturing fluid is prevented from entering the valve body, the fine sand in the fracturing fluid continuously exists in the valve body, the fine sand is rubbed with the valve block when the valve block moves, and the valve block is abraded. The valve block with the size error is arranged, so that the valve block is not too small to play a closing role in the valve body, the fracturing fluid is prevented from seeping out of the valve body, and the sealing gasket on the valve seat is used to prevent the fracturing fluid from seeping out of the gap of the valve seat and entering the valve body.

Description

Technical Field

[0001] This invention relates to the field of shale oil and gas extraction equipment technology, and more specifically, to a fracturing gate valve with a filter ring. Background Technology

[0002] In shale oil and gas extraction operations, fracturing technology is a core and necessary measure to increase oil and gas production. As a key control equipment in fracturing operations, fracturing gate valve plays an important role in controlling the flow of fracturing fluid.

[0003] Currently, conventional fracturing gate valves used in the industry generally adopt a basic structure of valve body + sliding valve block + fixed valve seat. The flow channel is opened and closed by the up and down sliding of the valve block. In actual fracturing operation scenarios, fracturing fluid needs to be pressurized by a high-pressure pump set and then transported to the downhole formation through the manifold and fracturing gate valve. The fracturing fluid will carry fine sand and solid particles of a certain size to meet the needs of formation fracturing and fracture creation. However, the flow pipe and valve block of existing conventional fracturing gate valves are only in rigid contact. When the fracturing fluid flows through the gate valve under high pressure, it is very easy to seep into the valve body of the gate valve from the gap between the valve block and the flow pipe. The seeping fracturing fluid cannot be discharged in time, and the fine sand and solid particles it carries will continue to accumulate in the inner cavity of the valve body, forming a sand accumulation layer.

[0004] When adjusting the fracturing fluid flow rate or changing the well position during operation, the valve block of the gate valve slides up and down. The moving valve block will continuously rub and collide with the fine sand accumulated in the valve body. Over time, this will not only cause severe wear on the surface of the valve block, resulting in a significant decrease in the sealing accuracy of the valve block, but will also further expand the fit clearance between the valve block and the flow channel pipe, forming a vicious cycle. Ultimately, this will cause the gate valve to completely fail in sealing performance, resulting in the problem of fracturing fluid leaking from the valve body. Summary of the Invention

[0005] The present invention provides a fracturing gate valve with a filter ring, which aims to solve the following problem: In conventional fracturing gate valves, the flow pipe and the valve block only have rigid contact. When fracturing fluid flows through the gate valve under high pressure, it is very easy to seep into the valve body from the gap between the valve block and the flow pipe. The seeping fracturing fluid cannot be discharged in time, and the fine sand and solid particles it carries will continue to accumulate in the valve body cavity, forming a sand accumulation layer. The moving valve block will have continuous rigid friction and collision with the fine sand accumulated in the valve body, resulting in a significant decrease in the sealing accuracy of the valve block.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fracturing gate valve with a filter ring, comprising a valve body, a flow channel pipe fixedly connected to the valve body, two flow channel pipes being provided and symmetrically arranged on both sides of the valve body, an installation plate being fixedly connected to the flow channel pipe, and a switching unit being provided inside the valve body, the switching unit being used to close or allow flow in the valve body;

[0007] The valve body is provided with a sealing unit. There are two sealing units, which are respectively arranged on both sides of the valve body. The sealing unit includes a thrust spring. There are two thrust springs, which are fixedly installed in the valve body.

[0008] The sealing unit is equipped with a compensation unit, which is used to compensate for the axial clearance on one side of the flow channel tube;

[0009] A sand collection unit is provided on the side of the sealing unit corresponding to the inlet end of the flow channel pipe. The sand collection unit is used to collect fine sand and impurities when the valve body is closed.

[0010] In a preferred embodiment, a movable column is fixedly connected to the push spring, a valve seat is fixedly connected to the movable column, and a sealing gasket is fitted onto the valve seat.

[0011] In a preferred embodiment, the switching unit includes a valve block, which is slidably disposed in the valve body. A flow hole is provided on the valve block. A rotating block is rotatably connected inside the valve block. A rotating screw is fixedly connected to the top of the rotating block. A rotating disk is fixedly connected to the top of the rotating screw.

[0012] In a preferred embodiment, the compensation unit includes a metal pad, which is fixedly disposed inside the valve seat. An elastic body is fixedly connected to the metal pad, a spring sheet is snapped into the elastic body, and a connecting block is fixedly connected to the elastic body.

[0013] In a preferred embodiment, a cylindrical pin is fixedly connected to the connecting block, and several sets of cylindrical pins are provided. The several sets of cylindrical pins are arranged circumferentially and equidistantly on the connecting block. A filter sand sheet is slidably connected to one end of the cylindrical pin at the inlet of the flow channel pipe, and a sand-isolating pad is slidably connected to one end of the cylindrical pin at the outlet of the flow channel pipe. A pressure relief groove is provided on the sand-isolating pad.

[0014] In a preferred embodiment, the sand accumulation unit includes a sand accumulation cylinder, which is fixedly installed at the bottom of the flow channel pipe. A main shaft is rotatably connected inside the sand accumulation cylinder, a second switch plate is fixedly connected to the main shaft, a secondary shaft is sleeved on the main shaft, a first switch plate is fixedly connected to the secondary shaft, and a cylinder cover is rotatably connected to the bottom of the sand accumulation cylinder.

[0015] In a preferred embodiment, a fixed platform is fixedly connected to the outer side wall of the valve body, a mounting frame is fixedly connected to the fixed platform, and a sliding plate is slidably connected inside the mounting frame.

[0016] In a preferred embodiment, a first limiting shaft is rotatably connected to the sliding plate, a second limiting shaft is rotatably connected to the sliding plate, the main shaft is sleeved with the first limiting shaft, the auxiliary shaft is sleeved with the second limiting shaft, a connecting plate is fixedly connected to the bottom of the valve block, and the other end of the connecting plate is fixedly connected to the bottom of the sliding plate.

[0017] In a preferred embodiment, a valve cover is installed on the top of the valve body, and a fixing bolt is rotatably connected to the top of the valve cover. Multiple fixing bolts are provided and are symmetrically arranged on the valve cover.

[0018] In a preferred embodiment, a pressure cap is fixedly connected to the top of the valve cover, and a mounting block is fixedly connected inside the pressure cap. A rotating screw is rotatably connected to the mounting block.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This invention uses a valve seat on the valve body that, under the action of a thrust spring and a moving column, adheres to the valve block, preventing the fracturing fluid from leaking out of the flow channel and the flow hole of the valve block. This avoids the fracturing fluid entering the valve body, preventing the continuous presence of fine sand in the fracturing fluid within the valve body. This would cause the fine sand to rub against the valve block during movement, leading to wear. This design also allows for a size tolerance in the valve block, preventing it from being too small and failing to close properly, thus preventing fracturing fluid leakage from the valve body. The sealing gasket on the valve seat prevents fracturing fluid from leaking out through the gaps in the valve seat and entering the valve body.

[0021] 2. In this invention, when fracturing fluid is delivered into the valve body through the flow channel, large impurities in the fracturing fluid are first intercepted by the filter sand on the valve seat, allowing only the fracturing fluid and fine sand in the fracturing fluid to pass through the filter sand. Because the fracturing fluid impacts the filter sand, the elastic body and spring plate counteract the impact force of the fracturing fluid on the filter sand. This design avoids the filter sand being impacted by strong force, causing the filter sand to collide with the valve seat, which would reduce the service life of the filter sand. This allows for a longer-lasting interception of large impurities in the fracturing fluid. The whole assembly, consisting of a metal pad, elastic body, spring plate and connecting block, expands and contracts with the increase or decrease of pressure on the valve block as the valve block moves upward or downward, ensuring that the sand-separating pad and filter sand on the connecting block always adhere to the valve body, preventing the fracturing fluid from flowing into the gaps.

[0022] 3. When the valve block moves upward, its bottom connecting plate drives the sliding plate to move upward within the mounting frame. The displacement of the sliding plate drives the main shaft and the secondary shaft to rotate, keeping the first switch plate and the second switch plate parallel. The fracturing fluid can then flow normally along the flow channel. When the valve block moves downward, the connecting plate drives the sliding plate to move downward, making the first and second switch plates vertical. The fracturing fluid then flows into the sand collection cylinder. Under the action of gravity, fine sand and solid particles settle to the bottom of the sand collection cylinder. After the switch plates are parallel and connected again, the operator can unscrew the cylinder cover to discharge the deposited fine sand and solid particles, thereby preventing particles from accumulating in the flow channel and ensuring the smooth flow of fracturing fluid in the flow channel and valve body. Attached Figure Description

[0023] Figure 1 This is a top view of the overall structure of the present invention.

[0024] Figure 2 This is a cross-sectional schematic diagram of the overall structure of the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of the switching unit in this invention.

[0026] Figure 4 This is a schematic diagram of the sealing unit in this invention.

[0027] Figure 5 This is a schematic cross-sectional view of the sealing unit in this invention.

[0028] Figure 6 For the present invention Figure 5 An enlarged schematic diagram of the structure at point A.

[0029] Figure 7 This is a schematic diagram of the transverse cross-sectional structure of the compensation unit in this invention.

[0030] Figure 8 This is a schematic diagram of the structure of the sand-separating pad in this invention.

[0031] Figure 9 This is a schematic diagram of the sand accumulation unit in this invention.

[0032] Figure 10 This is a schematic cross-sectional view of the sand accumulation unit in this invention.

[0033] Figure 11 This is a bottom view of the overall structure of the present invention.

[0034] In the diagram: 1. Valve body; 2. Flow channel pipe; 3. Mounting plate; 4. Valve cover; 5. Fixing bolt; 6. Gland; 7. Switching unit; 702. Rotating plate; 703. Mounting block; 704. Rotating screw; 705. Valve block; 706. Flow hole; 707. Connecting plate; 708. Rotating block; 8. Sealing unit; 801. Valve seat; 802. Sealing gasket; 803. Thrust spring; 804. Moving column; 9. Compensation unit; 901. Spring plate; 902. Metal pad ; 903, Elastomer; 904, Connecting block; 905, Filter sand sheet; 906, Cylindrical pin; 907, Sand separating pad; 908, Pressure relief groove; 10, Sand accumulation unit; 1001, Sand accumulation cylinder; 1002, Cylinder cover; 1003, Fixing platform; 1004, Mounting frame; 1005, Sliding plate; 1006, Main shaft; 1007, First limiting shaft; 1008, Sub-shaft; 1009, Second limiting shaft; 1010, First switch plate; 1011, Second switch plate. Detailed Implementation

[0035] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0036] Refer to the instruction manual appendix Figure 1 , Figure 2 and Figure 4 A fracturing gate valve with a filter ring includes a valve body 1, a flow channel pipe 2 fixedly connected to the valve body 1, two flow channel pipes 2 are provided and symmetrically arranged on both sides of the valve body 1, an installation plate 3 is fixedly connected to the flow channel pipe 2, and a switching unit 7 is provided inside the valve body 1. The switching unit 7 is used to close or allow flow in the valve body 1.

[0037] A sealing unit 8 is provided inside the valve body 1. There are two sealing units 8, and the sealing units 8 are respectively arranged on both sides inside the valve body 1. The sealing unit 8 includes a push spring 803. There are two push springs 803, and the push springs 803 are fixedly installed inside the valve body 1.

[0038] The sealing unit 8 is equipped with a compensation unit 9, which is used to compensate for the axial clearance on one side of the flow channel pipe 2.

[0039] A sand collection unit 10 is provided on one side of the sealing unit 8 corresponding to the input end of the flow channel pipe 2. The sand collection unit 10 is used to collect fine sand and impurities when the valve body 1 is closed.

[0040] It should be noted that the mounting plate 3 on the flow channel pipe 2 is installed on the equipment or pipeline by bolts to allow the liquid to flow smoothly. The flow hole 706 on the valve block 705 is smaller than the sealing unit 8. When the valve block 705 moves and the flow hole 706 is misaligned with the flow channel pipe 2, the flow hole 706 is completely covered by the sealing unit 8 to ensure that the liquid does not flow out. The compensation unit 9 compensates for the gap between the sealing unit 8 and the flow channel pipe 2 to prevent fracturing fluid from seeping out from the gap of the sealing unit 8 on the flow channel pipe 2 side.

[0041] Refer to the instruction manual appendix Figure 4 and Figure 5 As shown, further, a movable column 804 is fixedly connected to the push spring 803, a valve seat 801 is fixedly connected to the movable column 804, and a sealing gasket 802 is sleeved on the valve seat 801.

[0042] It should be noted that there are two valve seats 801, located on both sides inside the valve body 1. This allows them to simultaneously adhere to both sides of the valve block 705, resulting in a better sealing effect. The push spring 803 and the moving column 804 inside the valve body 1 are in a front-to-back relationship. The push spring 803 continuously pushes the moving column 804, and the end of the moving column 804 is locked onto the valve body 1, preventing the push spring 803 from pushing the moving column 804 out of the valve body 1.

[0043] Refer to the instruction manual appendix Figure 2 and Figure 3 As shown, further, the switch unit 7 includes a valve block 705, which is slidably disposed in the valve body 1. A flow hole 706 is provided on the valve block 705. A rotating block 708 is rotatably connected inside the valve block 705. A rotating screw 704 is fixedly connected to the top of the rotating block 708. A rotating disk 702 is fixedly connected to the top of the rotating screw 704.

[0044] It should be noted that the rotating disk 702 is snapped into the valve block 705. When the rotating disk 702 rotates, it will not cause the valve block 705 to rotate. Instead, the rotating disk 702 will drive the valve block 705 to move up and down.

[0045] In this embodiment, the specific implementation scenario is as follows: When fracturing fluid needs to flow, the operator holds the rotating disk 702, causing the rotating disk 702 to drive the rotating screw 704 to rotate. The rotating screw 704 moves upward, causing the valve block 705 to move upward. This aligns the flow hole 706 on the valve block 705 with the flow channel 2, forming a passage between the flow channel 2 and the valve body 1, allowing the fracturing fluid to flow smoothly. To prevent fracturing fluid from entering the valve body 1 and causing friction between the fine sand in the fracturing fluid and the valve block 705 inside the valve body 1, which could damage the valve body 1 under prolonged friction, the valve seat on the valve body 1 is activated when the valve block 705 moves up and down within the valve body 1. Under the action of the thrust spring 803 and the moving column 804, 801 will adhere to the valve block 705, preventing the fracturing fluid from leaking out of the flow channel pipe 2 and the flow hole 706 of the valve block 705. This avoids the fracturing fluid from entering the valve body 1, causing fine sand in the fracturing fluid to remain in the valve body 1. When the valve block 705 moves, the fine sand will rub against the valve block 705, causing wear. This setting also allows the valve block 705 to have a size error, so that the valve block 705 is not too small and cannot close properly in the valve body 1, causing the fracturing fluid to leak out of the valve body 1. The sealing gasket 802 on the valve seat 801 prevents the fracturing fluid from leaking out through the gaps in the valve seat 801 and entering the valve body 1.

[0046] Refer to the instruction manual appendix Figure 5 , Figure 6 and Figure 7As shown, although the fracturing fluid is prevented from entering the valve body 1 by fitting the valve seat 801 against the valve block 705, fine sand is added to the fracturing fluid before it flows into the flow pipe. This is done so that when the high-pressure fracturing fluid breaks the formation, the proppant carries the sand into the fracture and deposits there. Because the fine sand is piled up on the ground and then shoveled into the fracturing fluid, large impurities on the ground are mixed into the fine sand. Due to the change in pipe diameter, the pressure and flow rate of the fracturing fluid change, which increases the kinetic energy of the large impurities in the fracturing fluid. This causes the large impurities to violently collide with the inner wall of the flow hole 706. Over time, this will cause grooves of different depths to appear on the inner wall of the flow hole 706, trapping the flowing fine sand and reducing the flow efficiency of the flow hole 706.

[0047] To solve this problem, the present invention also provides the following technical solution: the compensation unit 9 includes a metal pad 902, the metal pad 902 is fixedly disposed in the valve seat 801, an elastic body 903 is fixedly connected to the metal pad 902, a spring sheet 901 is snapped into the elastic body 903, and a connecting block 904 is fixedly connected to the elastic body 903.

[0048] It should be noted that the metal pad 902, the elastomer 903 and the spring sheet 901 make the connecting block 904 at its outer end elastic, allowing the valve seat 801 to fit together with the valve body 1, and then the valve seat 801 to fit together with the valve block 705. This allows the valve seat 801 to fit and move between the valve body 1 and the valve block 705, preventing gaps from appearing between the valve block 705 and the valve body 1, which would cause fracturing fluid to seep into the cavity of the valve body 1.

[0049] Refer to the instruction manual appendix Figure 6 , Figure 7 and Figure 8 As shown, a cylindrical pin 906 is fixedly connected to the connecting block 904, and several sets of cylindrical pins 906 are provided. The several sets of cylindrical pins 906 are arranged circumferentially and equidistantly on the connecting block 904. A filter sand sheet 905 is slidably connected to one end of the cylindrical pin 906 at the input of the flow channel pipe 2, and a sand-isolating pad 907 is slidably connected to one end of the cylindrical pin 906 at the output of the flow channel pipe 2. A pressure relief groove 908 is provided on the sand-isolating pad 907.

[0050] It should be noted that the cylindrical pin 906 at the input end of the flow channel 2 has a filter plate 905. This design allows the filter plate 905 to intercept large impurities in the fracturing fluid, while the aperture of the filter plate 905 allows fine sand to pass through smoothly. This ensures that the fracturing fluid carries the fine sand smoothly through the valve block 705, preventing large impurities from entering the flow hole 706 of the valve block 705. On the other side, a sand-separating pad 907 is installed. This design ensures that the filter plate 905 fits snugly against the connecting block 904, preventing fine sand from entering the elastomer 903 and... Inside the spring plate 901, but without a filter plate 905 on the other side, the fracturing fluid flow can easily allow fracturing fluid containing fine sand to enter the elastomer 903 and the spring plate 901. The accumulation of fine sand over a long period of time will gradually cause the elastomer 903 and the spring plate 901 to lose their ability to stretch and deform. Therefore, a sand-isolating pad 907 is set on this side, and a pressure relief groove 908 is opened on the sand-isolating pad 907 to prevent fine sand from entering the elastomer 903 and the spring plate 901, so that the elastomer 903 and the spring plate 901 can always maintain elasticity to compensate for the gap between the valve seat 801 and the valve body 1.

[0051] In this embodiment, the specific implementation scenario is as follows: when the flow channel 2 delivers fracturing fluid into the valve body 1, large impurities in the fracturing fluid are first intercepted by the filter sand sheet 905 on the valve seat 801, allowing only the fracturing fluid and fine sand in the fracturing fluid to pass through the filter sand sheet 905. Because the fracturing fluid impacts the filter sand sheet 905, the elastic body 903 and the spring sheet 901 counteract the impact force of the fracturing fluid on the filter sand sheet 905. This design prevents the filter sand sheet 905 from being strongly impacted, ensuring that the filter sand sheet 905 and the valve seat... An impact at 801 reduces the service life of the filter sand sheet 905, thus allowing for longer-term interception of large impurities in the fracturing fluid. The assembly consisting of the metal pad 902, elastomer 903, spring sheet 901, and connecting block 904 expands and contracts as the valve block 705 moves upward or downward, ensuring that the sand-separating pad 907 on the connecting block 904 and the filter sand sheet 905 always adhere to the valve body 1, preventing the fracturing fluid from flowing into the gap.

[0052] Refer to the instruction manual appendix Figure 2 , Figure 9 and Figure 10 As shown, when the filter plate 905 intercepts large impurities in the fracturing fluid for a long time, a large amount of large impurities will accumulate in the flow channel pipe 2 on the interception side. When switching fracturing well locations or adjusting the fluid supply pipeline (such as from well A to well B), the valve block 705 at this point will be closed, preventing the fracturing fluid from flowing. This will cause fine sand and large impurities in the fracturing fluid to be flushed to this point. Long-term accumulation will cause pipeline blockage. When the valve block 705 is opened, the fracturing fluid cannot pass through due to pipeline blockage, affecting the fracturing fluid delivery efficiency.

[0053] To solve this problem, the present invention also provides the following technical solution: the sand accumulation unit 10 includes a sand accumulation cylinder 1001, the sand accumulation cylinder 1001 is fixedly installed at the bottom of the flow channel pipe 2, a main shaft 1006 is rotatably connected inside the sand accumulation cylinder 1001, a second switch plate 1011 is fixedly connected on the main shaft 1006, a secondary shaft 1008 is sleeved on the main shaft 1006, a first switch plate 1010 is fixedly connected on the secondary shaft 1008, and a cylinder cover 1002 is rotatably connected to the bottom of the sand accumulation cylinder 1001.

[0054] It should be noted that the main shaft 1006 is thinner than the secondary shaft 1008. The secondary shaft 1008 has two sections set on the main shaft 1006. The two sections of the secondary shaft 1008 are connected by the first switch plate 1010, so that the first switch plate 1010 and the second switch plate 1011 can rotate simultaneously. The first switch plate 1010 and the second switch plate 1011 are sized to seal the sand accumulation cylinder 1001.

[0055] Refer to the instruction manual appendix Figure 9 and Figure 10 As shown, a fixed platform 1003 is fixedly connected to the outer side wall of the valve body 1, and a mounting frame 1004 is fixedly connected to the fixed platform 1003. A sliding plate 1005 is slidably connected inside the mounting frame 1004.

[0056] It should be noted that the sliding plate 1005 is inside the sliding mounting frame 1004. The two sides of the sliding plate 1005 have protrusions that fit perfectly inside the mounting frame 1004. This allows the sliding plate 1005 to slide smoothly inside the mounting frame 1004 without the sliding plate 1005 coming off the mounting frame 1004.

[0057] Refer to the instruction manual appendix Figure 2 , Figure 9 and Figure 10 As shown, further, a first limiting shaft 1007 is rotatably connected to the sliding plate 1005, a second limiting shaft 1009 is rotatably connected to the sliding plate 1005, the main shaft 1006 is sleeved with the first limiting shaft 1007, the secondary shaft 1008 is sleeved with the second limiting shaft 1009, a connecting plate 707 is fixedly connected to the bottom of the valve block 705, and the other end of the connecting plate 707 is fixedly connected to the bottom of the sliding plate 1005.

[0058] It should be noted that there is a round block at one end of the main shaft 1006 and the secondary shaft 1008. This round block is respectively fitted on the first limiting shaft 1007 and the second limiting shaft 1009, so that the main shaft 1006 and the secondary shaft 1008 can rotate.

[0059] In this embodiment, the specific implementation scenario is as follows: When the valve block 705 moves upward, the connecting plate 707 at the bottom of the valve block 705 will drive the sliding plate 1005 to move upward within the mounting frame 1004. This movement of the sliding plate 1005 causes the limiting main shaft 1006 and secondary shaft 1008 to rotate, thereby keeping the first switch plate 1010 and the second switch plate 1011 parallel, allowing the fracturing fluid to flow from the flow channel 2. When the valve block 705 moves downward, the connecting plate 707 carries the sliding plate 1005 downward. The first switch plate 1010 and the second switch plate 1011 are moved to a vertical position, so that the fracturing fluid flows into the sand collection cylinder 1001. Due to gravity, fine sand and solid particles will sink to the bottom of the sand collection cylinder 1001. When the first switch plate 1010 and the second switch plate 1011 are kept parallel, the operator can rotate the cylinder cover 1002 to discharge the accumulated fine sand and solid particles. This avoids the accumulation of fine sand and solid particles in the flow channel pipe 2, which would affect the flow of fracturing fluid in the flow channel pipe 2 and the valve body 1.

[0060] Refer to the instruction manual appendix Figure 1 and Figure 11 As shown, a valve cover 4 is installed on the top of the valve body 1. A fixing bolt 5 is rotatably connected to the top of the valve cover 4. Multiple fixing bolts 5 are provided and are symmetrically arranged on the valve cover 4.

[0061] In this embodiment, the specific implementation scenario is as follows: the valve cover 4 and the valve body 1 are connected by multiple fixing bolts 5, so that the top of the valve body 1 is sealed, and the bottom of the fixing bolts 5 is connected by nuts.

[0062] Refer to the instruction manual appendix Figure 1 and Figure 2 As shown, a pressure cap 6 is fixedly connected to the top of the valve cover 4, and a mounting block 703 is fixedly connected inside the pressure cap 6. A rotating screw 704 is rotatably connected to the mounting block 703.

[0063] In this embodiment, the specific implementation scenario is as follows: the mounting block 703 inside the pressure cap 6 is provided with threads. When it is necessary to rotate the screw 704 to move upward or downward, the rotating screw 704 will cooperate with the mounting block 703, thereby causing the rotating screw 704 to drive the valve block 705 to move upward or downward.

[0064] Working principle:

[0065] 1. Rotating the rotating disk 702 drives the rotating screw 704 to rotate, which in turn drives the valve block 705 to slide up and down inside the valve body 1. The flow hole 706 is aligned or misaligned with the flow channel pipe 2 to realize the flow or disconnection of fracturing fluid.

[0066] II. To prevent high-pressure fracturing fluid from seeping into the inner cavity of valve body 1 and causing fine sand accumulation, the sealing units 8 on both sides of valve body 1 form a double sealing protection: the push spring 803 inside valve body 1 continuously pushes the moving column 804, causing valve seat 801 and the sealing gasket 802 on valve seat 801 to tightly fit against both sides of valve block 705, directly eliminating the fit gap between valve block 705 and flow channel 2, thus preventing fracturing fluid from seeping in at the source; the sealing gasket 802 on valve seat 801 further seals the gaps in valve seat 801 itself, preventing fracturing fluid from seeping out from the gaps in valve seat 801. At the same time, the elastic fitting method of valve seat 801 can accommodate slight dimensional errors in valve block 705, avoiding sealing failure caused by valve block 705 being too small, and preventing fracturing fluid from seeping out of valve body 1.

[0067] 3. The filter sand sheet 905 intercepts large impurities in the fracturing fluid, while the elastomer 903 and spring plate 901 buffer the impact of the fracturing fluid, ensuring the service life of the filter sand sheet 905. The elastic compensation structure, composed of the metal pad 902, elastomer 903, spring plate 901, and connecting block 904, adaptively expands and contracts with the pressure changes as the valve block 705 moves up and down. This ensures that the filter sand sheet 905 and sand-separating pad 907 on the connecting block 904 remain tightly fitted to the valve body 1, continuously compensating for the axial clearance on one side of the flow channel pipe 2, further preventing fracturing fluid from seeping through the gap. A pressure relief groove 908 is provided on the sand-separating pad 907 at the output end of the flow channel pipe 2. This not only prevents fine sand from entering the elastomer 903 and spring plate 901 and causing them to become stuck and lose their expansion and contraction capabilities, but also allows for pressure relief, ensuring that the elastic compensation structure always has the ability to compensate for gaps.

[0068] IV. The sand accumulation unit 10 and the switch unit 7 work together to collect and clean fine sand and solid particles. When the valve block 705 moves up and down, the connecting plate 707 at its bottom will drive the sliding plate 1005 to slide synchronously in the mounting frame 1004 of the fixed platform 1003 on the outside of the valve body 1. When the valve block 705 moves up (gate valve is open), the sliding plate 1005 moves up and drives the main shaft 1006 and the auxiliary shaft 1008 in the sand accumulation cylinder 1001 to rotate through the first limiting shaft 1007 and the second limiting shaft 1009, so that the first switch plate 1010 and the second switch plate 1011 in the cylinder are kept parallel, and the fracturing fluid flows normally along the flow channel pipe 2. When the valve block 705 moves down (gate valve is closed), the sliding plate 1005 moves down so that the first and second switch plates 1011 are in a vertical state, and the fracturing fluid and the fine sand and solid particles in it will flow into the sand accumulation cylinder 1001 at the bottom of the flow channel pipe 2, settle and accumulate at the bottom of the sand accumulation cylinder 1001 under the action of gravity. After the valve block 705 moves upward again and the gate valve resumes flow, the staff can unscrew the cap 1002 at the bottom of the sand collection cylinder 1001 to discharge the deposited fine sand and impurities, preventing them from accumulating in the flow channel pipe 2 and causing pipe blockage, thus ensuring the efficiency of fracturing fluid delivery.

[0069] 5. The fixing bolts 5 seal the connection between the valve cover 4 and the valve body 1, and the gland 6 fixes the mounting block 703, providing stable support for the rotating screw 704, ensuring accurate operation of each unit, and making the overall structure of the gate valve robust.

[0070] The embodiments of this example have been described above. However, this example is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. A fracturing gate valve with a filter ring, comprising a valve body (1), wherein a flow channel pipe (2) is fixedly connected to the valve body (1), two flow channel pipes (2) are provided and symmetrically arranged on both sides of the valve body (1), and an mounting plate (3) is fixedly connected to the flow channel pipe (2), characterized in that, The valve body (1) is provided with a switching unit (7), which is used to close or allow flow in the valve body (1); The valve body (1) is provided with a sealing unit (8), and there are two sealing units (8), which are respectively arranged on both sides inside the valve body (1). The sealing unit (8) includes a push spring (803), and there are two push springs (803), which are fixedly installed inside the valve body (1). The sealing unit (8) is provided with a compensation unit (9), which is used to compensate for the axial clearance on one side of the flow channel (2). The sealing unit (8) is provided with a sand collection unit (10) on one side of the inlet end of the flow channel pipe (2). The sand collection unit (10) is used to collect fine sand and impurities when the valve body (1) is closed.

2. The fracturing gate valve with a filter ring according to claim 1, characterized in that, A movable column (804) is fixedly connected to the thrust spring (803), a valve seat (801) is fixedly connected to the movable column (804), and a sealing gasket (802) is fitted onto the valve seat (801).

3. A fracturing gate valve with a filter ring according to claim 2, characterized in that, The switching unit (7) includes a valve block (705), which is slidably disposed in the valve body (1). A flow hole (706) is provided on the valve block (705). A rotating block (708) is rotatably connected inside the valve block (705). A rotating screw (704) is fixedly connected to the top of the rotating block (708). A rotating disk (702) is fixedly connected to the top of the rotating screw (704).

4. A fracturing gate valve with a filter ring according to claim 3, characterized in that, The compensation unit (9) includes a metal pad (902), which is fixedly disposed in the valve seat (801). An elastic body (903) is fixedly connected to the metal pad (902), a spring sheet (901) is snapped into the elastic body (903), and a connecting block (904) is fixedly connected to the elastic body (903).

5. A fracturing gate valve with a filter ring according to claim 4, characterized in that, A cylindrical pin (906) is fixedly connected to the connecting block (904), and several sets of cylindrical pins (906) are provided. Several sets of cylindrical pins (906) are arranged circumferentially and equally on the connecting block (904). A filter sand sheet (905) is slidably connected to one end of the cylindrical pin (906) at the input of the flow channel pipe (2), and a sand-isolating pad (907) is slidably connected to one end of the cylindrical pin (906) at the output of the flow channel pipe (2). A pressure relief groove (908) is provided on the sand-isolating pad (907).

6. A fracturing gate valve with a filter ring according to claim 5, characterized in that, The sand accumulation unit (10) includes a sand accumulation cylinder (1001), which is fixedly installed at the bottom of the flow channel pipe (2). A main shaft (1006) is rotatably connected inside the sand accumulation cylinder (1001). A second switch plate (1011) is fixedly connected on the main shaft (1006). A secondary shaft (1008) is sleeved on the main shaft (1006). A first switch plate (1010) is fixedly connected on the secondary shaft (1008). A cylinder cover (1002) is rotatably connected to the bottom of the sand accumulation cylinder (1001).

7. A fracturing gate valve with a filter ring according to claim 6, characterized in that, A fixed platform (1003) is fixedly connected to the outer wall of the valve body (1), and an installation frame (1004) is fixedly connected to the fixed platform (1003). A sliding plate (1005) is slidably connected inside the installation frame (1004).

8. A fracturing gate valve with a filter ring according to claim 7, characterized in that, A first limiting shaft (1007) is rotatably connected to the sliding plate (1005), and a second limiting shaft (1009) is rotatably connected to the sliding plate (1005). The main shaft (1006) is sleeved with the first limiting shaft (1007), and the secondary shaft (1008) is sleeved with the second limiting shaft (1009). A connecting plate (707) is fixedly connected to the bottom of the valve block (705), and the other end of the connecting plate (707) is fixedly connected to the bottom of the sliding plate (1005).

9. A fracturing gate valve with a filter ring according to claim 8, characterized in that, The valve body (1) is equipped with a valve cover (4) on top. The valve cover (4) is rotatably connected to a fixing bolt (5). There are multiple fixing bolts (5), and the multiple fixing bolts (5) are symmetrically arranged on the valve cover (4).

10. A fracturing gate valve with a filter ring according to claim 9, characterized in that, A pressure cap (6) is fixedly connected to the top of the valve cover (4), and an installation block (703) is fixedly connected inside the pressure cap (6). A rotating screw (704) is rotatably connected to the installation block (703).

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