A large-diameter ultra-high-pressure low-torque fracturing gate valve

Abstract

The present invention discloses a large-caliber ultra-high-pressure low-torque fracturing gate valve, including a valve body, a mounting bracket, a pressure gauge, a filter mechanism and a cover plate. A valve seat is arranged on the inner side of the valve body, a handwheel connector is arranged on the upper side of the bracket, a valve stem nut is fixed to the bottom of the handwheel connector, a screw is threadedly connected to the inner side of the valve stem nut, and the bottom of the screw is connected to a packing gland, the packing gland is fixed to the top of the valve stem, and the bottom of the valve stem is rotatably connected to a valve plate, the bottom of the pressure gauge is threadedly connected to the inner side of a sleeve, and the sleeve is fixed through the top of the valve seat, and the filter mechanism is fixed to the inner side of the connecting pipe. When the handwheel of the large-caliber ultra-high-pressure low-torque fracturing gate valve is manually turned, the handwheel connector, the conversion joint and the valve stem nut rotate as a whole, and at this time, the bearing can make the rotation process of the valve stem nut smoother, so as to achieve the effect of low torque and convenient operation.

Description

Technical Field

[0001] The present invention relates to the relevant technical field, and in particular to a large-caliber ultra-high-pressure low-torque fracturing gate valve. Background Art

[0002] In the field of oil and gas, in the middle and late stages of wellhead exploitation, due to blockage of the production layer or reasons of the formation structure, the wellhead pressure drops and the production decreases, and it is necessary to perform fracturing operations on the wellhead. Fracturing is to artificially create cracks in the formation to improve the flow environment of oil and gas underground, increase oil and gas production, and play an important role in improving bottom hole flow conditions, slowing down interlayer flow and improving oil layer utilization. Fracturing valves are the core components of fracturing operations. The existing fracturing gate valves do not have enough pressure, and the diameter is not large enough, the load-bearing capacity is not enough, and the hand wheel is not smooth and labor-saving enough to turn. It is inconvenient to filter and remove impurities from oil and gas during the transportation of oil and gas using this device. Summary of the invention

[0003] The purpose of the present invention is to provide a large-caliber ultra-high-pressure low-torque fracturing gate valve to solve the problems of the existing fracturing gate valves proposed in the above background technology, such as insufficient pressure, insufficient diameter, insufficient load-bearing capacity, and insufficient smooth and labor-saving rotation of the hand wheel, and it is inconvenient to filter and remove impurities from the oil and natural gas during the transportation of oil and natural gas by using the device.

[0004] To achieve the above object, the present invention provides the following technical solution: a large-caliber ultra-high-pressure low-torque fracturing gate valve, comprising a valve body, a mounting frame, a pressure gauge, a filter mechanism and a cover plate,

[0005] A valve body, wherein a valve seat is arranged on the inner side of the valve body, and an upper valve cover and a lower valve cover are fixed on the upper and lower sides of the valve body respectively, and a bracket is fixed on the top of the upper valve cover, and a handwheel connector is arranged on the upper side of the bracket, and the top of the handwheel connector is connected to the handwheel through a conversion joint, and a valve stem nut is fixed to the bottom of the handwheel connector, and the valve stem nut is rotatably connected to the inner side of the valve stem nut through a bearing, a screw is threadedly connected to the inner side of the valve stem nut, and the bottom of the screw is connected to a packing gland, and the packing gland is fixed to the top of the valve stem, and the bottom of the valve stem is rotatably connected to a valve plate, and the valve plate is located between the valve seats;

[0006] A pressure gauge, the bottom of which is threadedly connected to the inner side of a sleeve, and the sleeve is fixed through the top of a valve seat, while a connecting pipe is fixed to the left end of the valve seat by a stud bolt;

[0007] A filter mechanism is fixed on the inner side of the connecting pipe.

[0008] Preferably, the upper valve cover and the lower valve cover are symmetrically arranged on the valve body.

[0009] Preferably, two bearings are provided.

[0010] Preferably, the bottom of the valve plate is snap-connected to the guide rod, and a valve stem protector is sleeved on the outer side of the bottom of the guide rod.

[0011] The mounting frame is fixed to the bottom of the lower valve cover by a first fixing bolt, and a mounting hole is provided at the bottom of the mounting frame.

[0012] Preferably, the stud bolts are distributed at equal distances on the connecting pipe.

[0013] Preferably, the filtering mechanism comprises a filter screen and a second fixing bolt, and the filter screen is fixed to the inner side of the connecting pipe by the second fixing bolt.

[0014] Preferably, the second fixing bolts are evenly distributed on the filter screen.

[0015] Preferably, the cover plate passes through an opening, and the opening is provided at the bottom of the connecting pipe, and the cover plate is fixed to the connecting pipe by a third fixing bolt.

[0016] Compared with the prior art, the invention has the following beneficial effects: the large-caliber ultra-high-pressure low-torque fracturing gate valve

[0017] (1) The device is provided with a mounting hole, a connecting pipe, a filter screen and a cover plate. Before using the device, the direction of the connecting pipe can be adjusted according to the transportation direction of the oil and natural gas. After that, the device can be fixed at a desired location using the mounting hole and the external mounting member. Then, the connecting pipe can be connected to the external pipe using the external mounting member. During the process of using the device to transport oil and natural gas, the filter screen can filter the oil and natural gas to separate the impurities therein. At this time, the impurities remain on the outer end surface of the filter screen. After the work is completed and the cover plate is removed, the impurities on the filter screen can be cleaned out;

[0018] (2) The device is provided with a valve body, a valve seat, an upper valve cover, a lower valve cover and a valve plate. The device is resistant to high pressure and erosion, and has a full metal sealing structure of valve body-upper valve cover, valve body-lower valve cover, valve plate-valve seat, which is reliable in sealing. The size of the guide hole on the valve plate is consistent with the size of the valve seat sealing surface. The valve body channel hole is processed with high precision, and the medium is difficult to erode the sealing surface;

[0019] (3) It is provided with a valve body, valve seat, handwheel connector, conversion joint, handwheel, stem nut, bearing, packing gland, valve stem and valve plate. When the handwheel is manually turned, the handwheel connector, conversion joint and valve stem nut rotate as a whole. At this time, the bearing can make the rotation process of the valve stem nut smoother, which can achieve the effect of low torque and convenient operation. At the same time, the packing gland, valve stem and valve plate move up and down as a whole, which is convenient for controlling whether oil and natural gas flow and the amount of flow. The valve seat-valve body adopts double spring energy storage ring auxiliary sealing, which has excellent low-pressure sealing and prevents contamination of the sealing surface. In addition, the large diameter makes it easy to disassemble the handwheel. The opening and closing torque of the device can be controlled below 250N.m, and it can be easily switched under pressure;

[0020] (4) A valve body and a pressure gauge are provided. When the device is used to transport oil and natural gas, the pressure gauge can detect the pressure of the oil and natural gas in the valve body. If abnormal pressure is found, it means that there is a risk of leakage in the valve body, and the staff should take corresponding measures in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the front view of the appearance structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the left-side cross-sectional structure of the present invention;

[0024] Figure 4 It is a right view structural schematic diagram of the present invention;

[0025] Figure 5 It is a schematic diagram of a top-view cross-sectional structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the top view of the appearance structure of the present invention;

[0027] Figure 7 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0028] In the figure: 1, valve body, 2, valve seat, 3, upper valve cover, 4, lower valve cover, 5, bracket, 6, handwheel connector, 7, conversion joint, 8, handwheel, 9, valve stem nut, 10, bearing, 11, screw, 12, packing gland, 13, valve stem, 14, valve plate, 15, guide rod, 16, valve stem protector, 17, mounting frame, 18, first fixing bolt, 19, mounting hole, 20, sleeve, 21, pressure gauge, 22, connecting pipe, 23, stud bolt, 24, filtering mechanism, 2401, filter screen, 2402, second fixing bolt, 25, opening, 26, cover plate, 27, third fixing bolt. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-7 The present invention provides a technical solution: a large-caliber ultra-high-pressure low-torque fracturing gate valve, according to Figure 1 and Figure 2 As shown, a valve seat 2 is provided on the inner side of the valve body 1, and an upper valve cover 3 and a lower valve cover 4 are respectively fixed on the upper and lower sides of the valve body 1, and a bracket 5 is fixed on the top of the upper valve cover 3. The upper valve cover 3 and the lower valve cover 4 are symmetrically arranged on the valve body 1. The device is resistant to high pressure and erosion, and the valve body 1-upper valve cover 3, valve body 1-lower valve cover 4 are all-metal sealing structures with reliable sealing.

[0031] according to Figure 1 , Figure 2 and Figure 3 As shown, a handwheel connector 6 is provided on the upper side of the bracket 5, and the top of the handwheel connector 6 is connected to the handwheel 8 through a conversion joint 7, a valve stem nut 9 is fixed to the bottom of the handwheel connector 6, and the valve stem nut 9 is rotatably connected to the inner side of the valve stem nut 9 through a bearing 10, and two bearings 10 are provided. When the handwheel 8 is manually turned, the handwheel connector 6, the conversion joint 7 and the valve stem nut 9 rotate as a whole. At this time, the bearing 10 can assist the valve stem nut 9 to rotate, so that the valve stem nut 9 rotates more smoothly.

[0032] according to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the inner side of the valve stem nut 9 is threadedly connected with a screw rod 11, and the bottom of the screw rod 11 is connected to a packing gland 12, the packing gland 12 is fixed to the top of the valve stem 13, and the bottom of the valve stem 13 is rotatably connected to a valve plate 14, and the valve plate 14 is located between the valve seats 2, the bottom of the valve plate 14 is snap-connected to the guide rod 15, and a valve stem protector 16 is sleeved on the outer side of the bottom of the guide rod 15, after the valve plate 14 moves downward to the bottom, the guide rod 15 plays a role of snapping and limiting the valve plate 14, which is convenient for improving the stability of the valve plate 14, and the valve stem protector 16 plays a role of protecting the guide rod 15, the mounting frame 17 is fixed to the bottom of the lower valve cover 4 by a first fixing bolt 18, and a mounting hole 19 is opened at the bottom of the mounting frame 17, and the mounting frame 17 can be fixed at a desired location under the action of the mounting hole 19 and the external mounting parts, so as to facilitate the installation operation of the device.

[0033] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the bottom thread of the pressure gauge 21 is connected to the inner side of the sleeve 20, and the sleeve 20 is fixed on the top of the valve seat 2. At the same time, the left end of the valve seat 1 is fixed with a connecting pipe 22 by a stud bolt 23. The stud bolts 23 are evenly distributed on the connecting pipe 22. The connecting pipe 22 can be fixed to one end of the valve body 1 under the action of the stud bolts 23, which is convenient for assembly. The evenly distributed stud bolts 23 can make the connection between the connecting pipe 22 and the valve body 1 more secure.

[0034] according to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the filter mechanism 24 is fixed on the inner side of the connecting pipe 22, and the filter mechanism 24 includes a filter screen 2401 and a second fixing bolt 2402, and the filter screen 2401 is fixed on the inner side of the connecting pipe 22 by the second fixing bolt 2402. After the oil and natural gas enter the connecting pipe 22, they can be filtered under the action of the filter screen 2401, so as to separate the impurities in the oil and natural gas conveniently. The second fixing bolt 2402 is evenly distributed on the filter screen 2401. After the work is completed and the cover plate 26 is removed, the second fixing bolt 2402 can be unscrewed to remove the filter screen 2401, so as to facilitate the thorough cleaning of the filter screen 2401. The cover plate 26 passes through the opening 25, and the opening 25 is provided at the bottom of the connecting pipe 22. At the same time, the cover plate 26 is fixed on the connecting pipe 22 by the third fixing bolt 27. After the work is completed and the third fixing bolt 27 is unscrewed, the cover plate 26 can be removed, so as to facilitate the cleaning of the impurities on the left side of the filter screen 2401.

[0035] Working principle of this embodiment: When using the large-caliber ultra-high-pressure low-torque fracturing gate valve, the device is resistant to high pressure and erosion, and the valve body 1-upper valve cover 3, valve body 1-lower valve cover 4, valve plate 14-valve seat 2 are all metal sealing structures, and the sealing is reliable. The valve plate 14 has a guide hole whose size is consistent with the sealing surface size of the valve seat 2. The channel hole of the valve body 1 is processed with high precision, and it is difficult for the medium to scour the sealing surface. Tightening the stud bolts 23 can fix the connecting pipe to one end of the valve body 1. After adjusting the direction of the connecting pipe 22 according to the transportation direction of oil and natural gas, the device can be fixed to the desired location using the mounting hole 19 and the external mounting part, and then the connecting pipe 22 is connected to the external pipe using the external mounting part. In the process of using the device to transport oil and natural gas, the filter screen 2401 can filter the oil and natural gas. At this time, impurities remain in the filter screen 2401 On the outer end face of the valve, when the handwheel 8 is manually turned, the handwheel connector 6, the conversion joint 7 and the valve stem nut 9 rotate as a whole. At this time, the screw 11 moves downward, thereby driving the packing gland 12, the valve stem 13, and the valve plate 14 to move downward as a whole, which is convenient for controlling the circulation of oil and natural gas and the amount of circulation. After the valve plate 14 moves downward to the bottom, the guide rod 15 plays a role of locking and limiting the valve plate 14, which is convenient for improving the stability of the valve plate 14. The valve stem protector 16 plays a protective role on the guide rod 15. The bearing 10 can make the rotation process of the valve stem nut 9 smoother. The valve seat 2-valve body 1 adopts a double spring energy storage ring to assist in sealing, which has excellent low-pressure sealing and prevents the sealing surface The contamination of the valve body 1 and the large diameter make it easy to disassemble the hand wheel 8. The opening and closing torque of the device can be controlled below 250 N.m, and the switch under pressure can be easily performed. At the same time, the pressure gauge 21 can detect the pressure of the oil and natural gas in the valve body 1. If the pressure is abnormal, it means that there is a risk of leakage in the valve body 1. The staff should take corresponding measures in time. After the work is completed and the third fixing bolt 27 is unscrewed, the cover plate 26 can be removed, and then the second fixing bolt 2402 can be unscrewed to remove the filter 2401, so as to facilitate the thorough cleaning of the filter 2401. The contents not described in detail in this manual belong to the prior art known to professional and technical personnel in this field.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention. The techniques, shapes, and structural parts not described in detail in the present invention are all known technologies.

[0037] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-caliber ultra-high-pressure low-torque fracturing gate valve, comprising a valve body (1), a mounting frame (17), a pressure gauge (21), a filter mechanism (24) and a cover plate (26), characterized in that: A valve body (1), wherein a valve seat (2) is arranged on the inner side of the valve body (1), and an upper valve cover (3) and a lower valve cover (4) are fixed to the upper and lower sides of the valve body (1), respectively; a bracket (5) is fixed to the top of the upper valve cover (3); a handwheel connector (6) is arranged on the upper side of the bracket (5), and the top of the handwheel connector (6) is connected to the handwheel (8) via a conversion joint (7); a valve stem nut (9) is fixed to the bottom of the handwheel connector (6), and the valve stem nut (9) is rotatably connected to the inner side of the valve stem nut (9) via a bearing (10); a screw rod (11) is threadedly connected to the inner side of the valve stem nut (9), and the bottom of the screw rod (11) is connected to a packing gland (12); the packing gland (12) is fixed to the top of the valve stem (13), and the bottom of the valve stem (13) is rotatably connected to a valve plate (14), and the valve plate (14) is located between the valve seats (2); A pressure gauge (21), wherein the bottom of the pressure gauge (21) is threadedly connected to the inner side of the sleeve (20), and the sleeve (20) is penetrated and fixed to the top of the valve seat (2), and the left end of the valve seat (1) is fixed with a connecting pipe (22) via a stud bolt (23); A filtering mechanism (24), wherein the filtering mechanism (24) is fixed on the inner side of the connecting pipe (22); A mounting hole (19), a connecting pipe (22), a filter screen (2401) and a cover plate (26) are also provided. Before using the large-diameter ultra-high-pressure low-torque fracturing gate valve, the direction of the connecting pipe (22) can be adjusted according to the transportation direction of oil and natural gas. Afterwards, the large-diameter ultra-high-pressure low-torque fracturing gate valve can be fixed at a desired location using the mounting hole (19) and an external mounting member. Subsequently, the connecting pipe (22) can be connected to an external pipe using the external mounting member. The mounting frame (17) is fixed to the bottom of the lower valve cover (4) by a first fixing bolt (18), and the mounting hole (19) is provided at the bottom of the mounting frame (17).

2. A large-caliber ultra-high-pressure low-torque fracturing gate valve according to claim 1, characterized in that: The upper valve cover (3) and the lower valve cover (4) are symmetrically arranged on the valve body (1).

3. A large-caliber ultra-high-pressure low-torque fracturing gate valve according to claim 1, characterized in that: Two bearings (10) are provided.

4. A large-caliber ultra-high-pressure low-torque fracturing gate valve according to claim 1, characterized in that: The bottom of the valve plate (14) is snap-connected to the guide rod (15), and a valve stem protector (16) is sleeved on the outer side of the bottom of the guide rod (15).

5. A large-caliber ultra-high-pressure low-torque fracturing gate valve according to claim 1, characterized in that: The stud bolts (23) are distributed at equal distances on the connecting pipe (22).

6. A large-caliber ultra-high-pressure low-torque fracturing gate valve according to claim 1, characterized in that: The filtering mechanism (24) comprises a filter screen (2401) and a second fixing bolt (2402), and the filter screen (2401) is fixed to the inner side of the connecting pipe (22) by the second fixing bolt (2402).

7. A large-caliber ultra-high-pressure low-torque fracturing gate valve according to claim 6, characterized in that: The second fixing bolts (2402) are evenly distributed on the filter screen (2401).

8. A large-caliber ultra-high-pressure low-torque fracturing gate valve according to claim 1, characterized in that: The cover plate (26) passes through the opening (25), and the opening (25) is provided at the bottom of the connecting pipe (22), and the cover plate (26) is fixed to the connecting pipe (22) by means of a third fixing bolt (27).

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