Visual oil mine gate valve control device and method

Abstract

The invention relates to the technical field of oil mine gate valves, and discloses a visual oil mine gate valve control device and method.The visual oil mine gate valve control device comprises a valve body, the outer walls of the two sides of the valve body are in bolt connection with an upper valve deck and a lower valve deck correspondingly, an upper valve rod is slidably connected into the upper valve deck, and a lower valve rod is slidably connected into the lower valve deck; the upper valve rod and the lower valve rod are fixedly connected with a valve plate, horizontal tail grooves are formed in the two sides of the valve plate, the upper valve rod and the lower valve rod are connected into the horizontal tail grooves in the two sides in a clamped mode respectively, one end of the upper valve rod is fixedly connected with a ball screw, and the outer wall of the upper valve deck is in bolt connection with a bearing gland. A transmission shaft is driven to rotate through a hand wheel or hydraulic pressure, a ball screw structure is used for driving a valve plate to slide, opening and closing of a valve body are achieved, a transparent shield is arranged at the end of a lower valve rod, the extension distance of the valve rod can be directly observed, the opening and closing degree of the valve can be monitored in real time, a user can accurately control the valve conveniently, operation convenience and reliability are improved, and the structure is simple and stability is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil mine gate valves, in particular to a visual oil mine gate valve control device and method. BACKGROUND

[0002] In the exploitation, gathering and transportation and downhole operation of oil fields, as the core equipment for fluid control, the precise control of the opening and closing state of the valve is directly related to the production safety, efficiency and equipment life. Taking the wellhead control valve, oil pipeline regulating valve, high-pressure valve for fracturing operation and other typical scenes as examples, these valves need to be frequently operated under extreme working conditions of high temperature, high pressure, strong corrosion, flammable and explosive, and the control accuracy is extremely high - too small opening and closing degree may cause fluid obstruction, equipment pressure, too large opening and closing degree may cause leakage, pipeline vibration and even safety accidents.

[0003] However, the opening and closing state monitoring of traditional valves has long been plagued by technical shortcomings. Early valve operation mainly relies on manual experience: the operator indirectly infers the valve opening and closing degree by observing the changes of indirect parameters such as pressure gauge, flow meter and "hand feeling" when manually rotating the hand wheel. This method has obvious defects: on the one hand, manual experience is affected by the skill level and fatigue state of the operator, with high error rate; on the other hand, the changes of pressure, flow and other parameters are lagging, which cannot reflect the actual opening and closing state of the valve in real time, for example, the inertia of the fluid in the pipeline may cause a delay in pressure changes, which does not match the real-time position of the valve.

[0004] With the development of industrial automation, some valves begin to be equipped with position sensors such as displacement sensors and angle sensors, which feedback the valve rod position through electrical signals. However, this technology still faces challenges in practical application: the complex environment of oil fields, the sensor is easily disturbed by high temperature, vibration and corrosive medium (such as sulfide in crude oil), resulting in signal distortion or equipment failure; at the same time, the installation of the sensor requires modification of the valve structure, increasing the cost and maintenance difficulty, and the promotion is limited in the upgrading of the stock equipment. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides a visual oil mine gate valve control device and method, which solves the problem of high installation and maintenance cost of complex sensor structure and high error rate of manual experience of the operator in monitoring the opening and closing state of the valve in oil fields.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a visual oilfield gate valve control device, comprising a valve body, an upper valve cover and a lower valve cover bolted to the outer walls of both sides of the valve body, an upper valve stem slidably connected inside the upper valve cover, a lower valve stem slidably connected inside the lower valve cover, a valve plate fixedly connected to the upper and lower valve stems, flat tail grooves provided on both sides of the valve plate, the upper and lower valve stems respectively engaging inside the flat tail grooves on both sides, a ball screw fixedly connected to one end of the upper valve stem, a bearing cover bolted to the outer wall of the upper valve cover, a drive shaft rotatably connected inside the bearing cover, the drive shaft threadedly connected to the outer wall of the ball screw, a lower cover threadedly connected to the outer wall of the lower valve cover, a transparent cover fixedly connected to the lower cover, and a drive mechanism provided on the outer wall of the drive shaft.

[0007] The above solution utilizes flat-tail grooves on both sides of the valve plate to restrict its sliding motion. The lower valve stem extends beyond the lower valve cover and is protected by the lower cover and transparent shield. When the drive shaft rotates, the ball screw drives the upper valve stem to slide synchronously with the valve plate, while the lower valve stem moves with the valve plate, generating mechanical displacement. The transparent shield provides a transparent observation window for the lower valve stem, allowing operators to directly and accurately judge the sliding position of the valve plate and the opening / closing degree of the valve body in real time by observing the extension or retraction length of the lower valve stem. This conversion of the opening / closing state into a direct mechanical displacement display avoids flow rate control deviations caused by instrument errors or human misjudgment, significantly improving operational intuitiveness and control accuracy, while also simplifying the structure.

[0008] Preferably, the drive mechanism includes an adapter joint, which is bolted to the drive shaft, and a handwheel is fixedly connected to the outer wall of the adapter joint.

[0009] Preferably, both the upper and lower valve covers are provided with sealing gaskets inside, and the sealing gaskets on both sides are respectively fitted onto the outer walls of the upper and lower valve stems. Both the upper and lower valve covers are provided with stuffing boxes inside, and the outer walls of the stuffing boxes are bolted to packing glands. Both the upper and lower valve stems are fixedly connected to sealing shoulders.

[0010] Preferably, both the upper and lower valve covers are equipped with grease injection cylinders, and the output ends of the grease injection cylinders on both sides are close to the upper valve stem and the lower valve stem, respectively.

[0011] Preferably, the outer wall of the valve body is fixedly connected to an interface, the inside of the valve body is fixedly connected to a valve seat, the outer wall of the valve seat is in contact with the outer wall of the valve plate, the outer wall of the valve plate is slidably connected to the outer wall of the valve seat, and a sealing ring is sleeved on the outer wall of the valve seat, the outer wall of the sealing ring is in contact with the inner wall of the valve body.

[0012] Preferably, the outer wall of the valve seat is fixedly connected with a dustproof plate, the outer wall of the dustproof plate is attached to the outer wall of the valve plate, and the outer wall of the valve plate is slidingly connected to the outer wall of the dustproof plate.

[0013] Preferably, the inner part of the bearing gland is screw-connected with a tightening screw, and the outer wall of the tightening screw is attached to the outer wall of the transmission shaft.

[0014] Preferably, the inner part of the bearing gland is installed with a roller bearing, the inner wall of the roller bearing is attached to the outer wall of the transmission shaft, the inner part of the bearing gland is provided with an oil injection port, and the oil injection port is communicated with the roller bearing.

[0015] Preferably, the upper valve cover and the lower valve cover are both installed with a pressure relief valve, and the pressure relief valve is communicated with the inside and outside of the valve body.

[0016] A visual control method of oil mine gate valve, comprising the following steps: the hand wheel is rotated left to open and right to close, and attention should be paid to that when closing, the hand wheel should be reversed by 1 / 4-1 / 2 circle when closing to the bottom, and the number of opening or closing circles is 18; the roller bearing is regularly injected with butter through the oil injection port on the bearing seat; the valve has a reverse sealing performance, that is, the packing can be replaced on the pressure wellhead, if the packing is replaced, the upper valve rod is lifted to make the upper valve rod in sealing contact with the upper valve cover, and the bolt tool is padded in the sheath and the tail rod, then the bearing gland and the packing gland above the upper valve cover are disassembled, and if the tail rod packing is replaced, the valve rod is lowered to make the lower valve rod in sealing contact with the lower valve cover, and the lower sheath and the packing gland below the lower valve cover are disassembled.

[0017] Working principle: when the hand wheel is rotated, the transmission shaft is rotated, and the inside thereof forms a screw transmission pair with the ball screw. Due to the limitation of the flat tail groove on both sides of the valve plate on the rotation degree of freedom, the rotation movement of the transmission shaft is converted into the linear sliding movement of the valve plate, which drives the upper valve rod and the synchronously linked lower valve rod to move. The outer wall of the valve plate is tightly attached to the valve seat of the spray-welded hard alloy, and the opening size of the valve body passage is adjusted through sliding, that is, when the valve plate is completely slid out, the passage is fully opened, and the flow rate is maximum; when the valve plate is slid in, the passage is closed, and the flow rate is reduced to zero. The end of the lower valve rod is exposed outside through the transparent cover, and the extension length thereof directly reflects the position of the valve plate, so that the user can directly judge the opening and closing degree of the valve and realize the precise control of the flow rate. In addition, the hand wheel operation follows the principle of "left rotation to open and right rotation to close", and the hand wheel needs to be reversed by 1 / 4-1 / 2 circle when closing to prevent over-tightening and ensure the safety of operation.

[0018] The upper and lower valve covers are internally provided with packing glands, packing rings are filled and compressed by packing gland covers to prevent leakage between the valve rod and the valve cover; the sealing shoulder of the outer wall of the valve rod can abut against the inner wall of the valve cover when the packing ring is replaced, forming a temporary seal to avoid leakage of the valve cavity pressure, and maintenance can be completed without completely disassembling the valve. If the sealing part leaks, the secondary sealing grease can be injected through the grease injection cylinder of the upper and lower valve covers for temporary repair. The dustproof plate on the outer wall of the valve seat can block impurities from entering to protect the sealing surface of the valve plate and the valve seat; the valve body and the valve seat are further sealed by a sealing ring. When maintaining, the valve cavity pressure can be released through the pressure relief valve, and the packing ring or the sealing element can be quickly replaced: the upper valve cover packing ring can be replaced by lifting the valve plate, and the lower valve cover packing ring can be replaced by lowering the valve plate, which significantly improves the maintenance efficiency.

[0019] The transmission shaft is supported by a roller bearing, and the oil injection port on the bearing gland can be regularly injected with calcium-based lubricating grease to reduce rotational friction and prolong service life. The pressure relief valves on both sides of the valve body can release excess oil pressure when the system flow demand decreases (such as slow closing of the gate valve), preventing the pump outlet pressure from being too high; the pressure must be released through the pressure relief valve before replacing the packing ring to avoid safety accidents caused by high pressure. The hard alloy sealing surface of the valve plate and the valve seat has high wear resistance and corrosion resistance, suitable for harsh working conditions; the grease injection cylinder is equipped with a check valve and an outer cover, and the outer cover needs to be removed and connected to a high-pressure grease gun when injecting sealing grease to ensure that the sealing grease is injected into the valve cavity in one direction. In addition, the device has reverse sealing performance and can directly replace the packing ring on the pressure wellhead, further improving the flexibility and safety of use.

[0020] The application provides a visual oil mine gate valve control device and method. The application has the following beneficial effects: 1. The application drives the transmission shaft to rotate through a hand wheel or hydraulic drive, uses a ball screw structure to drive the valve plate to slide, realizes opening and closing of the valve body, and sets a transparent cover on the lower end of the valve rod to directly observe the extension distance of the valve rod, real-time monitor the opening and closing degree of the valve, facilitate accurate control of the user, improve operation convenience and reliability, and the structure is simple and stable.

[0021] 2. The application does not need to completely disassemble the valve when replacing the packing ring, only needs to adjust the position of the valve rod to make the sealing shoulder abut against the valve cover, and then the damaged packing ring can be quickly replaced, significantly reducing maintenance cost and downtime.

[0022] 3. The application adopts a design combining dynamic sealing and static sealing, the upper and lower valve covers are internally provided with sealing gaskets, packing glands and sealing shoulders, and cooperate with the grease injection cylinder to regularly inject sealing grease, forming multiple sealing guarantees; the dustproof plate and the sealing ring strengthen the protection of the sealing surface of the valve seat and the valve plate, improving wear resistance and corrosion resistance. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a perspective view of the application; Figure 2 It is a sectional view of the valve body of the applicationFigure 1 ; Figure 3 The internal section view of the valve body of the present application Figure 2 ; Figure 4 The internal section view of the bearing gland of the present application Figure 1 ; Figure 2 The internal section view of the bearing gland of the present application Figure 6 ; Figure 7 The internal section view of the upper valve cover of the present application Figure 8 The partial structure view of the lower valve cover of the present application Figure 1 The partial structure view of the lower valve rod of the present application

[0024] Wherein, 1, valve body; 2, upper valve cover; 3, lower valve cover; 4, upper valve rod; 5, valve plate; 6, flat tail groove; 7, lower valve rod; 8, transmission shaft; 9, ball screw; 10, bearing gland; 11, sealing gasket; 12, stuffing box; 13, stuffing gland; 14, dustproof plate; 15, valve seat; 16, interface; 17, tightening screw; 18, grease injection cylinder; 19, pressure relief valve; 20, roller bearing; 21, oil injection port; 22, adapter connector; 23, hand wheel; 24, sealing shoulder; 25, lower cover; 26, transparent cover; 27, sealing ring. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described clearly and completely below in combination with the drawings of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0026] Please refer to the drawings of the present application Figure 8 - the drawings of the present application Figure 1The embodiment of the present application provides a visual oil mine gate valve control device, which comprises a valve body 1, upper valve covers 2 and lower valve covers 3 which are respectively bolted to the outer walls of the two sides of the valve body 1, an upper valve rod 4 which is slidably connected to the inner part of the upper valve cover 2, a lower valve rod 7 which is slidably connected to the inner part of the lower valve cover 3, a valve plate 5 which is fixedly connected to the upper valve rod 4 and the lower valve rod 7, flat tail grooves 6 which are formed in the two sides of the valve plate 5, the upper valve rod 4 and the lower valve rod 7 which are respectively clamped and connected in the inner parts of the flat tail grooves 6 on the two sides, a ball screw 9 which is fixedly connected to one end of the upper valve rod 4, a bearing gland 10 which is bolted to the outer wall of the upper valve cover 2, a transmission shaft 8 which is rotatably connected to the inner part of the bearing gland 10, the inner part of the transmission shaft 8 which is threadedly connected with the outer wall of the ball screw 9, a lower protective cover 25 which is threadedly connected to the outer wall of the lower valve cover 3, a transparent protective cover 26 which is fixedly connected to the lower protective cover 25, and a driving mechanism which is arranged on the outer wall of the transmission shaft 8.

[0027] Specifically, in the present application, the opening and closing are realized through the sliding of the gate plate, when the gate valve control device is used, the inner wall of the transmission shaft 8 is threadedly connected with the ball screw 9, the bearing gland 10 supports the transmission shaft 8 to rotate, when the transmission shaft 8 is rotated, the flat tail groove 6 is limited, the valve plate 5 can only slide, therefore the sliding of the ball screw 9 is driven by the rotation of the transmission shaft 8, that is, the sliding of the valve plate 5 in the inner part of the valve body 1 is realized, a connecting hole is formed in one side of the valve plate 5, the opening and closing of the valve body 1 are controlled through the sliding of the valve plate 5, the lower valve rod 7 is arranged on the other side of the valve plate 5, the end part of the lower valve rod 7 extends out of the lower valve cover 3, the lower valve rod 7 can be observed through the lower protective cover 25 and the transparent protective cover 26, when the transmission shaft 8 rotates to drive the sliding of the valve plate 5 and the lower valve rod 7, the opening and closing degree can be directly observed through the extension distance of the lower valve rod 7, which is convenient for the user to control the valve.

[0028] Please refer to the accompanying drawings Figure 6 The driving mechanism comprises an adapter joint 22 which is bolted with the transmission shaft 8, and a hand wheel 23 which is fixedly connected to the outer wall of the adapter joint 22.

[0029] Specifically, in the present application, the hand wheel 23 is used to drive the rotation of the transmission shaft 8, the adapter joint 22 is rotated by rotating the hand wheel 23, the adapter joint 22 is fixedly connected with the transmission shaft 8, and the transmission shaft 8 is rotated by the adapter joint 22.

[0030] Please refer to the accompanying drawings Figure 6 The inner parts of the upper valve cover 2 and the lower valve cover 3 are provided with sealing gaskets 11, the outer walls of the upper valve rod 4 and the lower valve rod 7 are respectively sleeved with the sealing gaskets 11, the inner parts of the upper valve cover 2 and the lower valve cover 3 are respectively provided with stuffing boxes 12, the outer walls of the stuffing boxes 12 are bolted with stuffing gland 13, and the outer walls of the upper valve rod 4 and the lower valve rod 7 are respectively fixedly connected with sealing shoulders 24.

[0031] The packing gland 13 seals the packing gland 12. When the packing in the upper valve cover 2 is replaced, the transmission shaft 8 drives the upper valve rod 4 to slide, and the upper valve rod 4 slides towards the upper valve cover 2 until the sealing shoulder 24 abuts against the inner wall of the upper valve cover 2. At this time, the components on the upper valve cover 2, such as the bearing gland 10 and the packing gland 13, are disassembled. After disassembly, the damaged packing is removed from the inside of the packing gland 12, and a new packing is installed in the inside of the packing gland 12. Then, the packing gland 13 is bolted. Similarly, when the packing in the lower valve cover 3 is replaced, the transmission shaft 8 drives the valve plate 5 to slide, and the lower valve rod 7 slides towards the lower valve cover 3. At this time, the components after the lower valve cover 3, such as the lower cover 25, the transparent cover 26 and the packing gland 13 on the lower valve cover 3, are disassembled. After disassembly, the damaged packing is removed from the inside of the packing gland 12, and a new packing is installed in the inside of the packing gland 12. Then, the packing gland 13 is bolted. After the components are installed, the replacement is completed, and all parts do not need to be disassembled.

[0032] Please refer to the accompanying drawings Figure 1 The upper valve cover 2 and the lower valve cover 3 are internally provided with grease injection cylinders 18, and the output ends of the two grease injection cylinders 18 are respectively close to the upper valve rod 4 and the lower valve rod 7.

[0033] Specifically, the upper valve cover 2 and the lower valve cover 3 are internally provided with grease injection cylinders 18, the grease injection cylinder 18 comprises a one-way valve, and the part of the grease injection cylinder 18 leaking out of the upper valve cover 2 and the lower valve cover 3 is provided with an outer cover. When it is necessary to inject sealing grease, the outer cover of the grease injection cylinder 18 can be disassembled, a high-pressure sealing grease gun is connected, and the sealing grease is injected into the valve cavity. The flat plate valve should be regularly injected with sealing grease during use. Generally, it should be injected once after several opening and closing operations. If the sealing part of the upper valve rod 4 or the lower valve rod 7 leaks, the grease injection cylinder 18 on the upper valve cover 2 or the lower valve cover 3 can be used to inject secondary sealing grease. When the leakage is serious, the packing of the valve rod should be checked. If the packing is damaged, it should be replaced immediately.

[0034] Please refer to the accompanying drawings Figure 3 -Appendix Figure 2 The outer wall of the valve body 1 is fixedly connected with a joint 16, and the inner wall of the valve body 1 is fixedly connected with a valve seat 15. The outer wall of the valve seat 15 abuts against the outer wall of the valve plate 5. The outer wall of the valve plate 5 is slidably connected to the outer wall of the valve seat 15. The outer wall of the valve seat 15 is sleeved with a sealing ring 27, and the outer wall of the sealing ring 27 abuts against the inner wall of the valve body 1. The outer wall of the valve seat 15 is fixedly connected with a dustproof plate 14. The outer wall of the dustproof plate 14 abuts against the outer wall of the valve plate 5, and the outer wall of the valve plate 5 is slidably connected to the outer wall of the dustproof plate 14.

[0035] Specifically, a layer of hard alloy welding powder is sprayed on the sealing surface of the valve plate 5 and the valve seat 15, so that the surface has high wear resistance and corrosion resistance. Meanwhile, a dustproof plate 14 is fixedly connected to the outside of the valve seat 15, which can block impurities from entering and protect the sealing surface of the valve seat 15 and the valve plate 5. The sealing ring 27 further strengthens the sealing between the valve seat 15 and the inner wall of the valve body 1.

[0036] Please refer to the attached drawings Figure 4 The inside of the bearing gland 10 is threadedly connected with a tightening screw 17, and the outer wall of the tightening screw 17 is attached to the outer wall of the transmission shaft 8.

[0037] Specifically, the inside of the bearing gland 10 is provided with the tightening screw 17, which penetrates the bearing gland 10 and can be used to lock the transmission shaft 8. The tightening screw 17 should be loosened during the opening and closing operations of the valve, and must be tightened by hand after the full opening or full closing operation of the valve is completed.

[0038] Please refer to the attached drawings Figure 5 -attached drawings Figure 6 The inside of the bearing gland 10 is provided with a roller bearing 20, and the inner wall of the roller bearing 20 is attached to the outer wall of the transmission shaft 8. The inside of the bearing gland 10 is provided with an oil inlet 21, which is connected to the roller bearing 20.

[0039] Specifically, the transmission shaft 8 is supported by the roller bearing 20 in this application, which is installed in the inside of the bearing gland 10. The outer wall of the transmission shaft 8 is sleeved on the inner wall of the roller bearing 20. The roller bearing 20 is connected with the oil inlet 21, through which lubricating oil can be injected from the outside. Calcium-based lubricating grease can be added by a grease gun during or after the assembly of the valve. The lubricating grease should be fully poured each time. The consumption of the lubricating grease should be checked after each well operation, and should be replenished in time. If it is found to be deteriorated or contaminated, it should be replaced. The lubricating oil should be injected after the drain screw is removed. The drain screw is also provided on the bearing gland 10, opposite to the oil inlet 21.

[0040] Please refer to the attached drawings ​ Both the upper valve cover 2 and the lower valve cover 3 are provided with a pressure relief valve 19, which is connected between the inside and the outside of the valve body 1.

[0041] Specifically, the hydraulic pump is usually a "constant flow pump". When the system flow demand decreases, such as when the gate valve is slowly closed, the drive flow rate needs to be reduced, and the excess oil will cause the outlet pressure of the pump to rise. The pressure relief valve 19 is provided in this application for pressure relief. Since the packing is directly replaced on the well in this application, the valve cavity pressure should be relieved through the pressure relief valve 19 before replacing the packing to prevent safety accidents.

[0042] The embodiment of the present application also provides a visual control method of the oil mine gate valve, comprising the following steps: the hand wheel 23 is rotated left to open and right to close, and attention should be paid that when closing, the hand wheel 23 should be reversed by 1 / 4-1 / 2 circle when closing to the bottom, and the number of opening or closing circles is 18; the roller bearing 20 is regularly injected with butter through the oil injection port 21 on the bearing seat; the valve has a reverse sealing performance, that is, the packing can be replaced on the pressure wellhead, if the packing is replaced, the upper valve rod 4 is lifted, the upper valve rod 4 is in sealing contact with the upper valve cover 2, and the bolt tool is padded in the sheath and the tail rod, then the bearing gland 10 and the packing gland 13 above the upper valve cover 2 are disassembled, if the tail rod packing is replaced, the valve rod is lowered, the lower valve rod 7 is in sealing contact with the lower valve cover 3, and the lower protective cover 25 and the packing gland 13 below the lower valve cover 3 are disassembled.

[0043] Specifically, the valve body 1 is bolted with the upper valve cover 2 and the lower valve cover 3 on the two sides, the valve plate 5 is slidably arranged in the valve body 1, the flat tail groove 6 is formed on the two sides of the valve plate 5, the upper valve rod 4 and the lower valve rod 7 are clamped in the flat tail groove 6 to form an axial driving structure; the bearing gland 10 is bolted on the outer wall of the upper valve cover 2, the transmission shaft 8 is rotatably supported by the roller bearing 20 in the bearing gland 10, the transmission shaft 8 is threadedly connected with the ball screw 9 at the end of the upper valve rod 4, the hand wheel 23 or the hydraulic drive can drive the transmission shaft 8 to rotate, thereby controlling the valve plate 5 to slide to adjust the flow rate, the end of the lower valve rod 7 is realized visual monitoring of the opening and closing degree through the lower protective cover 25 and the transparent protective cover 26; the device adopts a double sealing design, the sealing pad 11, the packing gland 12 and the sealing shoulder 24 are arranged in the upper valve cover 2 and the lower valve cover 3, the sealing grease is regularly injected to form dynamic sealing in cooperation with the grease injection cylinder 18, when the packing is replaced, the device does not need to be completely disassembled, only needs to adjust the position of the valve rod to make the sealing shoulder 24 abut against the valve cover to quickly maintain; the roller bearing 20 is arranged in the bearing gland 10 and is injected with lubricating grease through the oil injection port 21, the valve body 1 is provided with the pressure relief valve 19 to prevent system overpressure, and the dustproof plate 14 and the sealing ring 27 strengthen the protection of the sealing surface between the valve seat 15 and the valve plate 5; when operating, the hand wheel 23 is rotated left to open and right to close, and after closing, it needs to be reversed by 1 / 4-1 / 2 circle to prevent being stuck, the reverse sealing function can replace the packing under pressure, the device has the adaptability of manual and hydraulic double drive, the convenience of maintenance without disassembly and multiple safety monitoring characteristics, and is suitable for precise flow rate control under high pressure and high corrosion working conditions.

[0044] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments can be changed, modified, replaced and varied in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A visualizing oil mine gate valve control device comprising a valve body (1), characterized in that, Both sides of the valve body (1) are bolted with upper valve cover (2) and lower valve cover (3), the inside of the upper valve cover (2) is slidably connected with upper valve rod (4), the inside of the lower valve cover (3) is slidably connected with lower valve rod (7), the upper valve rod (4) and the lower valve rod (7) are fixedly connected with valve plate (5), both sides of the valve plate (5) are provided with flat tail groove (6), the upper valve rod (4) and the lower valve rod (7) are respectively clamped and connected in the inside of both sides of flat tail groove (6), one end of the upper valve rod (4) is fixedly connected with ball screw (9), the outer wall of the upper valve cover (2) is bolted with bearing gland (10), the inside of the bearing gland (10) is rotatably connected with transmission shaft (8), the inside of the transmission shaft (8) is threadedly connected with the outer wall of ball screw (9), the outer wall of the lower valve cover (3) is threadedly connected with lower cover (25), the lower cover (25) is fixedly connected with transparent cover (26), the outer wall of the transmission shaft (8) is provided with driving mechanism.

2. A visualized oil mine gate valve control device according to claim 1, characterized in that, The driving mechanism comprises adapter joint (22), the adapter joint (22) is bolted with transmission shaft (8), the outer wall of the adapter joint (22) is fixedly connected with hand wheel (23).

3. A visualized oil mine gate valve control device according to claim 2, characterized in that, The inside of the upper valve cover (2) and the lower valve cover (3) is provided with sealing gasket (11), both sides of the sealing gasket (11) are respectively sleeved on the outer wall of the upper valve rod (4) and the lower valve rod (7), the inside of the upper valve cover (2) and the lower valve cover (3) is provided with packing box (12), the outer wall of the packing box (12) is bolted with packing gland (13), the outer wall of the upper valve rod (4) and the lower valve rod (7) is fixedly connected with sealing shoulder (24).

4. A visualized oil mine gate valve control device according to claim 3, characterized in that, The inside of the upper valve cover (2) and the lower valve cover (3) is mounted with grease injection cylinder (18), the output end of both sides of the grease injection cylinder (18) is respectively close to the upper valve rod (4) and the lower valve rod (7).

5. A visualized oil mine gate valve control device according to claim 1, characterized in that, The outer wall of the valve body (1) is fixedly connected with interface (16), the inside of the valve body (1) is fixedly connected with valve seat (15), the outer wall of the valve seat (15) is adhered to the outer wall of valve plate (5), the outer wall of the valve plate (5) is slidably connected to the outer wall of the valve seat (15), the outer wall of the valve seat (15) is sleeved with sealing ring (27), the outer wall of the sealing ring (27) is adhered to the inner wall of the valve body (1).

6. A visualized oil mine gate valve control device according to claim 5, characterized in that, The outer wall of the valve seat (15) is fixedly connected with dustproof plate (14), the outer wall of the dustproof plate (14) is adhered to the outer wall of the valve plate (5), the outer wall of the valve plate (5) is slidably connected to the outer wall of the dustproof plate (14).

7. A visualized oil mine gate valve control device according to claim 3, characterized in that, The inside of the bearing gland (10) is threadedly connected with tightening screw (17), the outer wall of the tightening screw (17) is adhered to the outer wall of the transmission shaft (8).

8. A visualized oil mine gate valve control device according to claim 7, characterized in that, The inside of the bearing gland (10) is mounted with roller bearing (20), the inner wall of the roller bearing (20) is adhered to the outer wall of the transmission shaft (8), the inside of the bearing gland (10) is provided with oil injection port (21), the oil injection port (21) is communicated with the roller bearing (20).

9. A visualized oil mine gate valve control device according to claim 8, characterized in that, The upper valve cover (2) and the lower valve cover (3) are both provided with pressure relief valves (19) which are connected with the inside and outside of the valve body (1).

10. A method of visualizing control of an oilfield gate valve, the method comprising: The visualized oil mine gate valve control device of any one of claims 1-9 comprises the following steps: the hand wheel (23) is turned left to open and right to close, and attention should be paid to that when closing, the hand wheel (23) should be turned back by 1 / 4-1 / 2 circle when closing to the bottom, and the number of opening or closing circles is 18; the roller bearing (20) is regularly injected with butter through the oil injection port (21) on the bearing seat; the valve has a reverse sealing performance, that is, the packing can be replaced on the pressure wellhead, if the packing is replaced, the upper valve rod (4) is lifted, the upper valve rod (4) is in sealing contact with the upper valve cover (2), and the bolt tool is padded in the sheath and the tail rod, then the bearing gland (10) and the packing gland (13) above the upper valve cover (2) are disassembled, if the tail rod packing is replaced, the valve rod is lowered, the lower valve rod (7) is in sealing contact with the lower valve cover (3), and the lower cover (25) and the packing gland (13) below the lower valve cover (3) are disassembled.

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