Ultrahigh pressure hydraulic drive gate valve

Abstract

The invention discloses an ultrahigh-pressure hydraulic drive gate valve, and relates to the technical field of petroleum machinery, the ultrahigh-pressure hydraulic drive gate valve comprises a valve body assembly, a hydraulic drive part and two sand baffles, the valve body assembly comprises a valve body, a valve plate and a valve seat, and a fluid channel and a mounting channel which are arranged in a crossed mode are formed in the valve body; the valve seat is installed at the intersection of the fluid channel and the installation channel, the valve plate is installed in the installation channel in a sliding mode, the valve plate is provided with an overflowing opening, sand storage cavities are formed in the two sides of the installation channel, and the sand storage cavities communicate with the external environment; the hydraulic driving part is located on one side of the valve body, extends into the mounting channel and is connected with the valve plate; the two sand blocking plates are both located in the valve body and connected to the valve seat, and a sand storage cavity is formed in the side, away from the mounting channel, of each sand blocking plate. The sand blocking plate is arranged to block sand grains, and the sand storage cavity collects and discharges the sand grains, so that the sand grains are prevented from being largely accumulated in the ultrahigh-pressure hydraulic drive gate valve, good sealing performance is kept, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum machinery, and in particular to an ultra-high pressure hydraulically driven gate valve. Background Art

[0002] During the oil fracturing process, the ultra-high pressure fracturing fluid pumped out by the fracturing truck is collected into the high and low pressure pipes through the discharge pipe, and then injected into the fracturing wellhead after being diverted through the diversion pipe. The flow direction of the fracturing fluid is controlled by the switch of the ultra-high pressure gate valve in various pipelines of oil fracturing. Since the high-pressure fracturing fluid contains a high amount of sand, the sand particles with smaller particle size can easily enter the ultra-high pressure gate valve. During long-term use, a large amount of sand particles will accumulate inside the ultra-high pressure gate valve, which is prone to problems such as wear of the gate valve sealing surface and reduced sealing of the gate valve, resulting in a reduced service life of the gate valve and certain safety hazards. Summary of the invention

[0003] The main purpose of the present invention is to provide an ultra-high pressure hydraulically driven gate valve, aiming to solve the technical problem in the prior art that sand accumulates inside the ultra-high pressure gate valve, resulting in a reduction in the service life of the gate valve.

[0004] To achieve the above-mentioned purpose, the ultra-high pressure hydraulically driven gate valve proposed in the present invention comprises a valve body assembly, a hydraulic driving component and two sand retaining plates, the valve body assembly comprises a valve body, a valve plate and a valve seat, the valve body is respectively provided with a cross-arranged fluid channel and an installation channel, the valve seat is installed at the intersection of the fluid channel and the installation channel, and the fluid channel runs through the valve seat, the valve plate is slidably installed in the installation channel, the valve plate is provided with an overflow port, and sand storage cavities are provided on both sides of the installation channel, and each of the sand storage cavities is communicated with the external environment; the hydraulic driving component is arranged on one side of the valve body, and the output shaft of the hydraulic driving component extends into the installation channel and is connected to the valve plate The cam is connected to the valve body and connected to one end of the valve seat away from the hydraulic drive component. The two sand deflectors are respectively arranged on both sides of the installation channel, and the sand storage chamber is opened on the side of each sand deflector away from the installation channel. The hydraulic drive component can drive the valve plate to slide along the installation channel between an open position and a closed position. When the valve plate is in the open position, the flow port is connected with the fluid flow channel to open the fluid channel. When the valve plate is in the closed position, the flow port is misaligned with the fluid channel to close the fluid channel. The two sand deflectors cooperate to block both sides of the flow port when the valve plate is in the closed position.

[0005] In one embodiment, the installation channel forms a first sand storage position at a position close to the hydraulic drive component, and the installation channel forms a second sand storage position at a position corresponding to the sand baffle plate; a pair of sand storage cavities are respectively opened on both sides of the installation channel corresponding to the first sand storage position, and another pair of sand storage cavities are respectively opened on both sides of the installation channel corresponding to the second sand storage position, and the two pairs of sand storage cavities are respectively located on both sides of the fluid channel.

[0006] In one embodiment, the valve body is provided with a sand cleaning hole corresponding to each of the sand storage cavities, and each of the sand cleaning holes connects the corresponding sand cleaning hole with the external environment.

[0007] In one embodiment, the valve body is further provided with a grease injection hole corresponding to each of the sand storage chambers, the grease injection hole connects the corresponding sand storage chamber with the external environment, and the grease injection hole and the sand cleaning hole are arranged at intervals, and a grease injection valve is arranged at one end of the grease injection hole away from the sand storage chamber.

[0008] In one embodiment, the hydraulic drive member is a hydraulic cylinder, an output shaft of the hydraulic cylinder forms a valve stem, and the hydraulic cylinder drives the valve plate to slide along the installation channel between the open position and the closed position through the valve stem.

[0009] In one embodiment, the valve body is provided with a first valve cover and a second valve cover at both ends along the extension direction of the installation channel, respectively. The first valve cover is connected to the hydraulic cylinder, the valve stem is passed through the first valve cover, and each of the sand retaining plates abuts against the second valve cover.

[0010] In one embodiment, the hydraulic cylinder is provided with a first flange and a second flange at two ends along the extension direction of the valve stem, respectively, the first valve cover is connected to the second flange, and the valve stem is passed through the second flange.

[0011] In one embodiment, a first sealing ring is provided between the valve stem and the second flange; and / or a second sealing ring is provided between the valve seat and the valve body; and / or gaskets are provided between the first valve cover and the valve body and between the second valve cover and the valve body.

[0012] In one embodiment, the valve body assembly also includes a tail rod and a tail rod cover, the tail rod is connected to the end of the valve plate facing away from the valve stem, and the tail rod is passed through the second valve cover and extends out of the valve body, the tail rod cover is connected to the valve body and covers the outside of the tail rod, and the two sand retaining plates are respectively located on both sides of the tail rod.

[0013] In one embodiment, there are two valve seats, which are respectively in contact with two sides of the valve plate, and the contact surfaces between the valve plate and each valve seat and the contact surfaces between each valve seat and the valve plate are both provided with a hard alloy layer.

[0014] The ultra-high pressure hydraulically driven gate valve proposed by the present invention is provided with two sand retaining plates on both sides of the installation channel, each sand retaining plate is connected to the valve seat and extends into the sand storage chamber. When the valve plate is in the closed position, the two sand retaining plates are respectively located on both sides of the sand retaining plates and block the flow port. The abutting surfaces of each sand retaining plate and the valve plate form a sealing surface. The sand retaining plates can block the sand entering the bottom of the valve seat through the fluid channel to the outside of the installation channel, and guide the sand into the sand storage chamber, so as to prevent the sand from entering the installation channel and affecting the sealing performance of the ultra-high pressure hydraulically driven gate valve. The sand storage chamber is connected to the external environment, so that the sand entering the sand storage chamber can be discharged out of the valve body, thereby preventing the accumulation of a large amount of sand in the ultra-high pressure hydraulically driven gate valve, and avoiding the sand from causing wear on the sealing surface of the ultra-high pressure hydraulically driven gate valve, thereby ensuring that the ultra-high pressure hydraulically driven gate valve has good sealing performance during long-term use, effectively improving the service life of the ultra-high pressure hydraulically driven gate valve, and eliminating the safety hazards in the oil fracturing pipeline under ultra-high pressure environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of an ultra-high pressure hydraulically driven gate valve according to an embodiment of the present invention in a side view at one viewing angle;

[0017] Figure 2 A schematic diagram of the structure of an ultra-high pressure hydraulically driven gate valve according to an embodiment of the present invention is a side view from another perspective.

[0018] Description of Figure Numbers:

[0019] 10. Valve body assembly; 11. Valve body; 111. First valve cover; 112. Second valve cover; 12. Valve plate; 121. Flow port; 13. Valve seat; 14. Fluid channel; 15. Installation channel; 16. Sand storage chamber; 17. Sand cleaning hole; 18. Grease injection hole; 181. Grease injection valve; 19. Tail rod; 191. Tail rod cover; 20. Hydraulic drive component; 21. Valve stem; 30. Sand retaining plate.

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] In the present invention, the descriptions of directions such as "up", "down", "left" and "right" are as follows: Figure 1 The directions shown are for reference only and are used to explain the Figure 1 The relative position relationship between the components in the shown posture. If the specific posture changes, the directional indication will also change accordingly.

[0025] During the oil fracturing process, the ultra-high pressure fracturing fluid pumped out by the fracturing truck is collected into the high and low pressure pipes through the discharge pipe, and then injected into the fracturing wellhead after being diverted through the diversion pipe. The flow direction of the fracturing fluid is controlled by the switch of the ultra-high pressure gate valve in various pipelines of oil fracturing. Since the high-pressure fracturing fluid contains a high amount of sand, the sand particles with smaller particle size can easily enter the ultra-high pressure gate valve. During long-term use, a large amount of sand particles will accumulate inside the ultra-high pressure gate valve, which is prone to problems such as wear of the gate valve sealing surface and reduced sealing of the gate valve, resulting in a reduced service life of the gate valve and certain safety hazards.

[0026] The present invention proposes an ultra-high pressure hydraulically driven gate valve, comprising a valve body assembly 10, a hydraulically driven component 20 and two sand retaining plates 30. The valve body assembly 10 comprises a valve body 11, a valve plate 12 and a valve seat 13. The valve body 11 is provided with a fluid channel 14 and an installation channel 15 which are arranged crosswise. The valve seat 13 is installed at the intersection of the fluid channel 14 and the installation channel 15, and the fluid channel 14 runs through the valve seat 13. The valve plate 12 is slidably installed in the installation channel 15. The valve plate 12 is provided with a flow port 121. Sand storage cavities 16 are provided on both sides of the installation channel 15, and each sand storage cavity 16 is communicated with the external environment. The hydraulically driven component 20 is arranged on one side of the valve body 11, and the output shaft of the hydraulically driven component 20 extends into the installation channel. 15 and connected to the valve plate 12; the two sand retaining plates 30 are both located in the valve body 11 and connected to the end of the valve seat 13 away from the hydraulic drive component 20, the two sand retaining plates 30 are respectively arranged on both sides of the installation channel 15, and a sand storage chamber 16 is opened on the side of each sand retaining plate 30 away from the installation channel 15; the hydraulic drive component 20 can drive the valve plate 12 to slide along the installation channel 15 between the open position and the closed position, the valve plate 12 connects the flow port 121 with the fluid flow channel to open the fluid channel 14 when the valve plate 12 is in the open position, and the flow port 121 is misaligned with the fluid channel 14 when the valve plate 12 is in the closed position to close the fluid channel 14, and the two sand retaining plates 30 cooperate to block both sides of the flow port 121 when the valve plate 12 is in the closed position.

[0027] See also Figure 1 , the fluid channel 14 along Figure 1 The installation channel 15 extends in the left and right directions. Figure 1The hydraulic drive member 20 extends in the up-down direction of the valve body 11, and a valve seat 13 cavity for installing the valve seat 13 is provided in the valve body 11 at the intersection of the fluid channel 14 and the installation channel 15, so that the two valve seats 13 are installed on the left and right sides of the valve plate 12. When the valve plate 12 is in the open position, the flow port 121 on the valve plate 12 is aligned with the fluid channel 14, thereby opening the fluid channel 14; when the hydraulic drive member 20 drives the valve plate 12 to slide from the open position to the closed position, the valve plate 12 slides downward, and the flow port 121 slides between the two sand retaining plates 30, and the two sand retaining plates 30 are respectively slidably abutted with the left and right sides of the valve plate 12, so that the two sides of the flow port 121 are blocked by the two sand retaining plates 30, so that the left and right sides of the valve plate 12 are sealed when the valve plate 12 is in the closed position, and the abutting surfaces of each sand retaining plate 30 and the valve plate 12 form the sealing surface of the ultra-high pressure hydraulic driven gate valve. Each sand retaining plate 30 extends downward into the corresponding sand storage chamber 16. The sand retaining plate 30 can block the sand entering the bottom of the valve seat 13 through the fluid channel 14 to the outside of the installation channel 15, and guide the sand into the sand storage chamber 16 to prevent the sand from entering the installation channel 15 and affecting the sealing of the ultra-high pressure hydraulically driven gate valve. It can be explained that the ultra-high pressure hydraulically driven gate valve proposed by the present invention is suitable for ultra-high pressure working conditions of 20000Psi.

[0028] The ultra-high pressure hydraulically driven gate valve proposed in the present invention has two sand retaining plates 30 respectively arranged on both sides of the installation channel 15, each sand retaining plate 30 is connected to the valve seat 13 and extends into the sand storage chamber 16, when the valve plate 12 is in the closed position, the two sand retaining plates 30 are respectively located on both sides of the sand retaining plates 30 and block the flow port 121, and each sand retaining plate 30 forms a sealing surface with the abutting surface of the valve plate 12, the sand retaining plates 30 can block the sand particles entering the bottom of the valve seat 13 through the fluid channel 14 to the outside of the installation channel 15, and guide the sand particles into the sand storage chamber 16, so as to prevent the sand particles from entering the installation channel 15 and affecting the sealing performance of the ultra-high pressure hydraulically driven gate valve. The sand storage chamber 16 is communicated with the external environment, so that the sand entering the sand storage chamber 16 can be discharged out of the valve body 11, thereby preventing a large amount of sand from accumulating in the ultra-high pressure hydraulically driven gate valve, and preventing the sand from causing wear on the sealing surface of the ultra-high pressure hydraulically driven gate valve, thereby ensuring that the ultra-high pressure hydraulically driven gate valve has good sealing performance during long-term use, effectively improving the service life of the ultra-high pressure hydraulically driven gate valve, and eliminating safety hazards in oil fracturing pipelines under ultra-high pressure environments.

[0029] In one embodiment, the position of the installation channel 15 close to the hydraulic drive component 20 forms a first sand storage position, and the position of the installation channel 15 corresponding to the sand baffle 30 forms a second sand storage position; a pair of sand storage cavities 16 are respectively opened on both sides of the installation channel 15 corresponding to the first sand storage position, and another pair of sand storage cavities 16 are respectively opened on both sides of the installation channel 15 corresponding to the second sand storage position, and the two pairs of sand storage cavities 16 are respectively located on both sides of the fluid channel 14.

[0030] Please continue reading Figure 1 A sand storage chamber 16 is provided above each of the two valve seats 13, and the two sand storage chambers 16 above the valve seats 13 are respectively located on the left and right sides of the installation channel 15. A sand storage chamber 16 is also provided below each of the two valve seats 13, and the two sand storage chambers 16 below the valve seats 13 are respectively located on the left and right sides of the installation channel 15. Since the portion of the valve plate 12 located above the flow port 121 is filled in the installation channel 15, the sand particles entering the upper part of the valve seat 13 can only enter the sand storage chamber 16 located above the valve seat 13 through the gap between the valve plate 12 and the side wall of the installation channel 15, so there is no need to set a sand retaining plate 30 above the valve seat 13, and when the valve plate 12 is located in the closed position, the flow port 121 moves downward with the valve plate 12, so two sand retaining plates 30 are provided below the valve seat 13 to effectively prevent sand particles from entering the installation channel 15. The four sand storage chambers 16 are provided to facilitate the discharge of sand particles entering various positions in the ultra-high pressure hydraulically driven gate valve, thereby preventing the sand particles from accumulating and affecting the sealing performance of the ultra-high pressure hydraulically driven gate valve.

[0031] In one embodiment, the valve body 11 is provided with a sand cleaning hole 17 corresponding to each sand storage cavity 16 , and each sand cleaning hole 17 connects the corresponding sand cleaning hole 17 with the external environment.

[0032] See also Figure 2 The sand cleaning hole 17 connects the sand storage chamber 16 with the external environment. The operator can discharge the sand in the sand storage chamber 16 to the outside of the ultra-high pressure hydraulic driven gate valve through the sand cleaning hole 17, which is convenient for regular sand cleaning and maintenance of the sand storage chamber 16. The sand cleaning process of the sand storage chamber 16 does not affect the normal operation of the ultra-high pressure hydraulic driven gate valve, and sand cleaning and maintenance are convenient.

[0033] In one embodiment, the valve body 11 is further provided with a grease injection hole 18 corresponding to each sand storage cavity 16, the grease injection hole 18 connects the corresponding sand storage cavity 16 with the external environment, and the grease injection hole 18 is spaced apart from the sand cleaning hole 17, and a grease injection valve 181 is provided at one end of the grease injection hole 18 away from the sand storage cavity 16.

[0034] It should be noted that the grease injection hole 18 is connected between the corresponding sand storage chamber 16 and the external environment, so that the operator can inject grease into the sand storage chamber 16 through the grease injection hole 18 to reduce the friction between the sand particles and the valve body assembly 10, reduce wear, and improve the service life and reliability of the ultra-high pressure hydraulically driven gate valve. In addition, the grease injection hole 18 and the sand cleaning hole 17 are arranged at intervals to avoid mutual interference during the grease injection operation and the sand cleaning operation, thereby ensuring the high efficiency of the maintenance operation of the ultra-high pressure hydraulically driven gate valve.

[0035] In one embodiment, the hydraulic drive member 20 is a hydraulic cylinder, the output shaft of the hydraulic cylinder forms a valve stem 21 , and the hydraulic cylinder drives the valve plate 12 to slide along the installation channel 15 between an open position and a closed position through the valve stem 21 .

[0036] It can be understood that the hydraulic cylinder is connected to the valve stem 21, and the hydraulic cylinder drives the valve stem 21 to move in the installation channel 15, thereby driving the valve plate 12 to slide between the open position and the closed position through the valve stem 21, and the hydraulic drive of the valve plate 12 is realized by the hydraulic cylinder, ensuring that the ultra-high pressure hydraulically driven gate valve has good flexibility and switching response speed.

[0037] In one embodiment, a first valve cover 111 and a second valve cover 112 are respectively provided at both ends of the valve body 11 along the extension direction of the installation channel 15 , the first valve cover 111 is connected to the hydraulic cylinder, the valve stem 21 is passed through the first valve cover 111 , and each sand retaining plate 30 abuts against the second valve cover 112 .

[0038] Furthermore, by providing the first valve cover 111, the hydraulic cylinder is firmly connected to the valve body 11, and the valve stem 21 is passed through the first valve cover 111 and connected to the valve plate 12, thereby ensuring the effective transmission of the hydraulic drive component 20 and maintaining the sealing environment between the hydraulic drive component 20 and the valve body 11. Each sand retaining plate 30 abuts against the second valve cover 112, so that the sand retaining plate 30 is stably fixed in the valve body 11, preventing sand and other impurities from entering the installation channel 15, thereby protecting the sealing surface from wear and extending the service life of the ultra-high pressure hydraulically driven gate valve.

[0039] In one embodiment, the hydraulic cylinder is provided with a first flange and a second flange at both ends along the extension direction of the valve stem 21, the first valve cover 111 is connected to the second flange, and the valve stem 21 is passed through the second flange. It can be understood that the first flange facilitates the connection of the ultra-high pressure hydraulically driven gate valve with an external pipeline, and the second flange facilitates the connection of the hydraulic cylinder with the valve body 11, thereby ensuring the tight connection between the hydraulic drive member 20 and the valve body assembly 10, and effectively improving the sealing inside the ultra-high pressure hydraulically driven gate valve.

[0040] In one embodiment, a first sealing ring is provided between the valve stem 21 and the second flange; and / or a second sealing ring is provided between the valve seat 13 and the valve body 11; and / or gaskets are provided between the first valve cover 111 and the valve body 11 and between the second valve cover 112 and the valve body 11.

[0041] It can be explained that the first sealing ring is an ESU sealing ring, which has good elasticity and wear resistance, and can maintain stable sealing performance under high pressure and high temperature environment. By arranging the ESU sealing ring between the valve stem 21 and the second flange, the sealing between the valve stem 21 and the second flange can be effectively improved; the second sealing ring is an ESC sealing ring, and the gap between the valve seat 13 and the valve body 11 is filled by the ESC sealing ring, which can further prevent sand particles entering the valve seat 13 from entering the valve body 11 through the gap; the gasket is a middle flange gasket, and a middle flange gasket is arranged between the first valve cover 111 and the valve body 11, and a middle flange gasket is also arranged between the second valve cover 112 and the valve body 11, and the material of the middle flange gasket matches the material of the first flange and the second flange, thereby further improving the sealing inside the ultra-high pressure hydraulically driven gate valve.

[0042] In one embodiment, the valve body assembly 10 also includes a tail rod 19 and a tail rod cover 191. The tail rod 19 is connected to the end of the valve plate 12 that is away from the valve stem 21, and the tail rod 19 is passed through the second valve cover 112 and extends out of the valve body 11. The tail rod cover 191 is connected to the valve body 11 and covers the outside of the tail rod 19. Two sand retaining plates 30 are respectively located on both sides of the tail rod 19.

[0043] It should be noted that the tail rod 19 and the valve stem 21 are respectively connected to the two ends of the valve plate 12, and when the valve plate 12 is in the open position, the tail rod 19 is located in the installation space; when the valve stem 21 drives the valve plate 12 to slide from the open position to the closed position, the tail rod 19 slides together with the valve plate 12 and extends into the outside of the valve body 11 through the opening of the installation channel 15, and the tail rod cover 191 is connected to the valve body 11 to cover the opening of the installation channel 15 to prevent external contaminants from entering the installation channel 15. In addition, the tail rod cover 191 is transparently arranged, and by observing whether the tail rod 19 extends out of the opening of the installation channel 15, the position of the valve plate 12 can be judged, thereby distinguishing the opening and closing state of the ultra-high pressure hydraulically driven gate valve.

[0044] In one embodiment, there are two valve seats 13 , which are respectively in contact with two sides of the valve plate 12 , and the contact surfaces between the valve plate 12 and each valve seat 13 and the contact surfaces between each valve seat 13 and the valve plate 12 are both provided with a hard alloy layer.

[0045] It is worth mentioning that during the opening and closing process of the ultra-high pressure hydraulically driven gate valve, the valve plate 12 and the valve seat 13 are frequently in contact and friction. The abutting surfaces of the valve plate 12 and each valve seat 13 and the abutting surfaces of each valve seat 13 and the valve plate 12 are both provided with a hard alloy layer. The hard alloy layer has good high temperature resistance and wear resistance under high temperature and high pressure environment, thereby greatly reducing the loss caused by frequent friction between the valve plate 12 and the valve seat 13, ensuring that the ultra-high pressure hydraulically driven gate valve has good sealing performance during long-term use, and effectively extending its service life.

[0046] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An ultra-high pressure hydraulically driven gate valve, characterized in that: include: A valve body assembly (10), the valve body assembly (10) comprising a valve body (11), a valve plate (12) and a valve seat (13), the valve body (11) being provided with cross-arranged fluid channels (14) and mounting channels (15), the valve seat (13) being installed at the intersection of the fluid channels (14) and the mounting channels (15), and the fluid channels (14) passing through the valve seat (13), the valve plate (12) being slidably installed in the mounting channels (15), the valve plate (12) being provided with a flow port (121), and sand storage chambers (16) being provided on both sides of the mounting channels (15), and each of the sand storage chambers (16) being in communication with the external environment; A hydraulic drive component (20), wherein the hydraulic drive component (20) is arranged on one side of the valve body (11), and an output shaft of the hydraulic drive component (20) extends into the installation channel (15) and is connected to the valve plate (12); Two sand retaining plates (30), both of which are located in the valve body (11) and connected to one end of the valve seat (13) away from the hydraulic drive component (20), the two sand retaining plates (30) are arranged on both sides of the installation channel (15), and the sand storage chamber (16) is opened on the side of each sand retaining plate (30) away from the installation channel (15); The hydraulic drive component (20) can drive the valve plate (12) to slide along the installation channel (15) between an open position and a closed position. When the valve plate (12) is in the open position, the flow port (121) is connected to the fluid flow channel to open the fluid channel (14). When the valve plate (12) is in the closed position, the flow port (121) is misaligned with the fluid channel (14) to close the fluid channel (14). The two sand retaining plates (30) cooperate to block both sides of the flow port (121) when the valve plate (12) is in the closed position.

2. The ultra-high pressure hydraulically driven gate valve according to claim 1, characterized in that: The position of the installation channel (15) close to the hydraulic drive member (20) forms a first sand storage position, and the position of the installation channel (15) corresponding to the sand retaining plate (30) forms a second sand storage position; A pair of sand storage cavities (16) are respectively opened on both sides of the installation channel (15) corresponding to the first sand storage position, and another pair of sand storage cavities (16) are respectively opened on both sides of the installation channel (15) corresponding to the second sand storage position, and the two pairs of sand storage cavities (16) are respectively located on both sides of the fluid channel (14).

3. The ultra-high pressure hydraulically driven gate valve according to claim 2, characterized in that: The valve body (11) is provided with a sand cleaning hole (17) corresponding to each of the sand storage chambers (16), and each of the sand cleaning holes (17) connects the corresponding sand cleaning hole (17) with the external environment.

4. The ultra-high pressure hydraulically driven gate valve according to claim 3, characterized in that: The valve body (11) is further provided with a grease injection hole (18) corresponding to each of the sand storage chambers (16). The grease injection hole (18) connects the corresponding sand storage chamber (16) with the external environment, and the grease injection hole (18) is arranged at a distance from the sand cleaning hole (17). A grease injection valve (181) is arranged at one end of the grease injection hole (18) away from the sand storage chamber (16).

5. The ultra-high pressure hydraulically driven gate valve according to claim 1, characterized in that: The hydraulic drive member (20) is a hydraulic cylinder, the output shaft of the hydraulic cylinder forms a valve stem (21), and the hydraulic cylinder drives the valve plate (12) to slide along the installation channel (15) between the open position and the closed position through the valve stem (21).

6. The ultra-high pressure hydraulically driven gate valve according to claim 5, characterized in that: The valve body (11) is provided with a first valve cover (111) and a second valve cover (112) at both ends along the extension direction of the installation channel (15), the first valve cover (111) is connected to the hydraulic cylinder, the valve stem (21) is passed through the first valve cover (111), and each of the sand retaining plates (30) is in contact with the second valve cover (112).

7. The ultra-high pressure hydraulically driven gate valve according to claim 6, characterized in that: The hydraulic cylinder is provided with a first flange and a second flange at both ends along the extension direction of the valve stem (21), the first valve cover (111) is connected to the second flange, and the valve stem (21) is inserted through the second flange.

8. The ultra-high pressure hydraulically driven gate valve according to claim 7, characterized in that: A first sealing ring is provided between the valve stem (21) and the second flange; And / or, a second sealing ring is provided between the valve seat (13) and the valve body (11); And / or, a gasket is provided between the first valve cover (111) and the valve body (11), and between the second valve cover (112) and the valve body (11).

9. The ultra-high pressure hydraulically driven gate valve according to claim 6, characterized in that: The valve body assembly (10) further comprises a tail rod (19) and a tail rod cover (191); the tail rod (19) is connected to an end of the valve plate (12) away from the valve stem (21), and the tail rod (19) is inserted through the second valve cover (112) and extends out of the valve body (11); the tail rod cover (191) is connected to the valve body (11) and covers the outside of the tail rod (19); and the two sand retaining plates (30) are respectively located on both sides of the tail rod (19).

10. The ultra-high pressure hydraulically driven gate valve according to any one of claims 1 to 9, characterized in that: There are two valve seats (13), and the two valve seats (13) are respectively abutted against two sides of the valve plate (12). The abutting surfaces between the valve plate (12) and each valve seat (13) and the abutting surfaces between each valve seat (13) and the valve plate (12) are both provided with a hard alloy layer.

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