Manual-hydraulic integrated high-pressure flat gate valve

Abstract

The manual-hydraulic integrated high-pressure flat gate valve has a hydraulic mode and a manual mode at the same time, and the valve can be completely opened or closed no matter in which mode. When a hydraulic mode is usually used, the stop valve on one side of the oil cylinder is closed firstly, then the oil cylinder is connected with an external hydraulic control device through a pipeline, and the hydraulic control device controls a piston in the oil cylinder to move up and down through oil pressure, so that the valve is opened or closed; when no external hydraulic control device exists on site or the hydraulic control device loses efficacy, the manual mode can be started emergently, the stop valve on one side of the oil cylinder is opened firstly, pressure on the two sides of the piston in the oil cylinder is balanced, then the hand wheel is rotated, the switching torque of the manual valve is reduced through a transmission device of the ball screw and the bearing, and therefore the valve is opened or closed rapidly. And the fluid flows or is cut off.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of petroleum machinery, especially relates to a hand and hydraulic integrated high-pressure flat gate valve. BACKGROUND

[0002] At present, according to the information displayed by oil field feedback, the main control valve is generally used hand-operated high-pressure flat gate valve or hydraulic high-pressure flat gate valve during the fracturing operation of wellhead, although the hand-operated flat gate valve is simple to operate on site, but the opening and closing torque is big, and the opening and closing time is long, and the operation personnel have certain dangerousness when operating the valve on the wellhead, the hydraulic flat gate valve uses hydraulic device to remotely control the opening and closing of valve, and the opening and closing time is short, and the operation is convenient, and the safety of operation personnel is guaranteed, but when the hydraulic control device suddenly fails on site, the hydraulic valve cannot normally open and close, and production safety accidents can be caused, the above is the problem that production and use unit needs to solve together. SUMMARY

[0003] In order to solve the technical defects that the opening and closing torque of hand-operated valve is big, and the opening and closing time is long, and the hydraulic valve cannot open or close due to control device failure, the utility model provides a hand and hydraulic integrated high-pressure flat gate valve.

[0004] In order to realize the above-mentioned purpose, the utility model takes the following technical scheme implementation:

[0005] A hand and hydraulic integrated high-pressure flat gate valve, it includes: upper cylinder cover, cap, piston, "O" type sealing ring, guard ring, lower valve rod, oil cylinder, lower cylinder cover, packing gland, packing, connecting bolt, grease injection valve, valve cover, sealing gasket, valve body, gate plate, valve seat, inner sealing ring, outer sealing ring, upper valve rod, gasket, needle roller bearing, support, oil nozzle, cylindrical pin, support sleeve, ball screw, hand wheel, hexagon bolt, valve cover, inner hexagon bolt, packing gasket, pressure relief valve, sand baffle, elbow, stop valve, indicating rod, shroud, its characterized in that: the upper and lower ends of valve body are connected with valve cover, valve seat is installed in the inside of valve body, the both ends of gate plate are connected with upper and lower valve rods, and are placed in the middle of valve seat, upper valve rod is connected with ball screw through upper valve cover, ball screw is assembled with support sleeve, needle roller bearing, support, valve cover and hand wheel, and forms hand drive mechanism, lower valve rod is connected with piston through lower valve cover, piston is assembled with lower cylinder cover, oil cylinder and upper cylinder cover, and forms hydraulic drive mechanism, one side of oil cylinder periphery is connected with hydraulic control device pipeline, and the other side is connected with elbow and stop valve, when stop valve is closed, valve becomes hydraulic mode, hydraulic control device controls the up-and-down movement of piston in oil cylinder, lower valve rod drives gate plate to slide up and down in parallel, so as to achieve the opening and closing of valve, when stop valve is opened, the pressure balance of piston in oil cylinder is balanced, valve becomes hand mode, after rotating ball screw, upper valve rod drives gate plate to slide up and down in parallel between valve seats, and realizes the opening and closing of valve.

[0006] As a further improvement of the utility model, the valve interior and the fluid contact place are built up welding with nickel base alloy material, the gasket ring groove is built up welding with stainless steel material, the gate plate surface and the valve seat surface are treated with supersonic spraying tungsten carbide, the valve rod surface is treated with carburizing, the material hardness and corrosion resistance are increased.

[0007] As a further improvement of the utility model, the valve cover and the valve body are sealed with metal gasket ring, the sealing element between the valve rod and the valve cover and the sealing element between the valve seat and the valve body are all the packing seal ring combined with stainless steel spring and rubber material, the sealing between the piston and the oil cylinder adopts "0" type high saturation butyl nitrile rubber ring.

[0008] As a further improvement of the utility model, the manual transmission device of the valve adopts the design combined with ball screw and needle bearing, no matter the opening or closing of the valve is manually controlled or liquid controlled, the ball screw will flexibly rotate in the circumferential direction, and the rotating torque is very small.

[0009] As a further improvement of the utility model, the two ends of the gate plate and the head of the valve rod are designed with T-shaped grooves, the gate plate is connected with the valve rod by T-shaped grooves, the gate plate and the valve rod can be opened or closed without being in the same perpendicular state when the valve interior is subjected to pressure.

[0010] As a further improvement of the utility model, the valve interior is designed with sand baffle, which is closely arranged on the both sides of the gate plate flow passage hole, when the valve is closed, the sand in the gate plate flow passage hole is prevented from falling into the valve cavity, when the valve is opened, the sand in the gate plate flow passage hole is discharged from the valve cavity along with the fluid, and the sand prevention function of the valve interior is realized.

[0011] As a further improvement of the utility model, the valve cover is designed with symmetrical grease injection hole and pressure relief hole, and is respectively provided with grease injection valve and pressure relief valve, when the valve interior cannot be sealed, the grease injection valve can be used to inject sealing grease into the valve interior for sealing the valve, when the valve interior has excess pressure and the valve cannot be removed, the pressure relief valve can be used to release the excess pressure in the valve interior, and the safety hidden danger on site is avoided.

[0012] As a further improvement of the utility model, the lower cylinder cover and the support sleeve are designed with air outlet holes, when the packing seal ring between the valve rod and the valve cover fails and cannot be sealed, the leaked fluid can flow out from the air outlet holes of the lower cylinder cover or the support sleeve, the pressure in the valve interior is released, and the fluid pressure damage to the oil cylinder or the ball screw is avoided.

[0013] As a further improvement of the utility model, the indicating rod is installed on the valve rod, the displacement of the indicating rod can be observed from outside, and whether the valve interior is completely opened or closed can be judged.

[0014] The advantages of this utility model are as follows: A high-pressure flat gate valve integrating manual and hydraulic operation simultaneously possesses both hydraulic and manual modes, ensuring complete opening and closing of the valve regardless of the mode. In hydraulic mode, the shut-off valve on one side of the cylinder is first closed, and then the cylinder is connected to an external hydraulic control device via a pipeline. The hydraulic control device controls the piston in the cylinder to move up and down through hydraulic pressure, thereby opening or closing the valve. When there is no external hydraulic control device on site or the hydraulic control device fails, the manual mode can be activated in an emergency. First, the shut-off valve on one side of the cylinder is opened to balance the pressure on both sides of the piston in the cylinder. Then, the handwheel is turned, and the opening and closing torque of the manual valve is reduced through a transmission device using a ball screw and bearings, allowing the valve to open or close quickly, enabling fluid flow or interruption. This flat gate valve has a reasonable structure, integrating the technical advantages of both manual and hydraulic modes, perfectly solving the technical shortcomings of manual valves (high opening and closing torque, long opening and closing time) and hydraulic valves (failure to open or close due to control device malfunction). The mode can be selected arbitrarily according to the site conditions, making operation convenient, shortening working time, improving work efficiency and economic benefits, and reducing safety hazards. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the structure of a high-pressure flat gate valve that integrates hand and liquid functions.

[0016] Appendix Figure 2 For the appendix Figure 1 A magnified cross-sectional view of the structure in the middle section.

[0017] Appendix Figure 3 For the appendix Figure 1 A magnified cross-sectional view of the structure in the middle section.

[0018] Appendix Figure 1 The components include: 1. Upper cylinder head; 2. Cap; 3. Piston; 4. O-ring seal; 5. Protective ring; 6. Lower valve stem; 7. Oil cylinder; 8. Lower cylinder head; 9-1. Packing gland; 10-1. Packing; 11-1. Connecting bolt; 12-1. Grease injection valve; 13-1. Valve cover; 14-1. Sealing gasket; 15. Valve body; 16. Gate; 17. Valve seat; 18. Inner sealing ring; 19. Outer sealing ring; 14-2. Sealing gasket; 13-2. Valve cover; 12-2. Grease injection valve; 20. Upper valve stem; 11-2. Connecting bolt; 1... 0-2, Packing gland; 9-2, Washer; 21, Needle roller bearing; 22, Bracket; 23, Oil nozzle; 24, Cylindrical pin; 25, Support sleeve; 26, Ball screw; 27, Handwheel; 28, Hex bolt; 29, Valve cover; 30, Internal hex bolt; 31, Locking screw; 32, Packing washer; 33-1, Pressure relief valve; 34-1, Sand baffle; 35, Pressure relief valve; 34-2, Packing washer; 33-2, Hex bolt; 34, Bend; 35-1, Gate valve; 36, Bend; 35-12, Indicator rod; 37, Protective cover; 38. Detailed Implementation

[0019] The utility model discloses further illustrate the specific implementation of the utility model with the drawings.

[0020] Valve seat 17 is placed in the valve body 15, and is sealed by inner sealing ring 18 and outer sealing ring 19, and the upper valve rod 20 and the lower valve rod 6 are connected with the gate 16 by a T-shaped slot, are placed between the valve seat 17, the valve cover 13-2 and the valve body 15 are connected by connecting bolt 11-2, and sealing gasket ring 14-2 is placed in the middle for sealing, grease injection valve 12-2 and pressure relief valve 34-1 are installed on the periphery of valve cover 13-2, the upper valve rod 20 passes through valve cover 13-2, packing 10-2 and packing washer 33-1 are sequentially placed in the packing cavity of valve cover 13-2, and are compressed by packing gland 9-2, so that packing 10-2 is in close contact with the upper valve rod 20, and sealing effect is achieved.

[0021] Further, the tail of the upper valve rod 20 is threadedly connected with the ball screw 27, is fixed by the cylindrical pin 25, the ball screw 27 and the needle bearing 22 are sequentially placed on the washer 21, are tightened on the valve cover 13-2 by the support 23, the ball screw 27 and the needle bearing 22 are fixed, the support 23 is sequentially provided with the grease nipple 24 and the locking screw 32 on the periphery, the ball screw 27 is connected with the valve cover 30 by the hexagonal bolt 29, the hand wheel 28 is placed on the valve cover 30, and is fixed by the hexagonal bolt 29.

[0022] Further, the valve cover 13-1 and the valve body 15 are connected by connecting bolt 11-1, sealing gasket ring 14-1 is placed in the middle for sealing, grease injection valve 12-1 and pressure relief valve 34-2 are installed on the periphery of valve cover 13-1, the lower valve rod 6 passes through valve cover 13-1, packing 10-1 and packing washer 33-2 are sequentially placed in the packing cavity of valve cover 13-1, and are compressed by packing gland 9-1, so that packing 10-1 is in close contact with the lower valve rod 6, and sealing effect is achieved.

[0023] Further, the lower cylinder cover 8 is threadedly connected with the valve cover 13-1, the oil cylinder 7 is connected with the lower cylinder cover 8 and the upper cylinder cover 1 by hexagonal bolt 34, the tail of the lower valve rod 6 is connected with the piston 3, is fastened by the cap 2, the piston 3 is placed in the oil cylinder 7, is sealed by "O" type sealing ring 4, and the retainer ring 5 protects the "O" type sealing ring 4, the indicating rod 37 is connected with the tail of the lower valve rod 6, the protective cover 38 is tightened on the upper end of the upper cylinder cover 1, and the stop valve 36 is connected with the elbow pipe 35-1 and the elbow pipe 35-12 to form an integral body, and then is connected with the lower cylinder cover 8 and the upper cylinder cover 1.

[0024] Further, the valve uses hydraulic mode, first close the stop valve 36, through the oil pressure control oil cylinder 7 in the piston 3 up and down movement, the lower valve stem 6 drive the gate 16 between the valve seat 17 up and down parallel sliding, realize the opening and closing of the valve, so as to achieve the opening and closing of the valve; the valve uses manual mode, first open the stop valve 36, make the piston 3 both sides of the oil cylinder 7 pressure balance, then rotate the hand wheel 28, through the transmission device of ball screw 27 and needle bearing 22, the upper valve stem 20 drive the gate 16 between the valve seat 17 up and down parallel sliding, realize the opening and closing of the valve.

[0025] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-pressure flat gate valve integrated with hand sanitizer, comprising: Upper cylinder cover, cap, piston, "O" type sealing ring, retainer, lower valve stem, oil cylinder, lower cylinder cover, packing gland, packing, connecting bolt, grease valve, valve cover, gasket ring, valve body, gate, valve seat, inner sealing ring, outer sealing ring, upper valve stem, gasket, needle bearing, bracket, oil nozzle, cylindrical pin, support sleeve, ball screw, hand wheel, hexagonal bolt, valve cover, inner hexagonal bolt, packing gasket, pressure relief valve, sand baffle, elbow, stop valve, indicator rod, shroud; characterized in that: the upper and lower ends of the valve body are connected with the valve cover, the valve seat is installed in the interior of the valve body, the two ends of the gate are connected with the upper and lower valve stems, and are placed in the middle of the valve seat, the upper valve stem is connected with the ball screw through the upper valve cover, and the ball screw is assembled with the support sleeve, the needle bearing, the bracket, the valve cover and the hand wheel to form a manual driving mechanism; the lower valve stem is connected with the piston through the lower valve cover, and the piston is assembled with the lower cylinder cover, the oil cylinder and the upper cylinder cover to form a hydraulic driving mechanism; one side of the periphery of the oil cylinder is connected with a hydraulic control device pipeline, and the other side is connected with the elbow and the stop valve; when the stop valve is closed, the valve becomes a hydraulic mode, the hydraulic control device controls the piston in the oil cylinder to move up and down through oil pressure, the lower valve stem drives the gate to slide up and down in parallel, so that the opening and closing of the valve are achieved; when the stop valve is opened, the pressure on both sides of the piston in the oil cylinder is balanced, the valve becomes a manual mode, and after the ball screw is rotated, the upper valve stem drives the gate to slide up and down in parallel between the valve seats, so that the opening and closing of the valve are realized.

2. A high-pressure flat gate valve integrated with a hand liquid according to claim 1, characterized in that: The valve body is made of nickel-based alloy material, the gasket ring groove is made of stainless steel material, the surface of the gate and the surface of the valve seat are treated by tungsten carbide supersonic spraying, and the surface of the valve stem is treated by carburizing, so that the hardness and corrosion resistance of the material are increased.

3. A high pressure flat gate valve integrated with a hand liquid according to claim 1, characterized in that: The seal between the valve cover and the valve body adopts a metal gasket ring, the seal between the valve stem and the valve cover and the seal between the valve seat and the valve body are all packing seals made of stainless steel springs and rubber materials, and the seal between the piston and the oil cylinder adopts an "O" type high-saturation butyronitrile rubber ring.

4. A high-pressure flat gate valve integrated with a hand liquid according to claim 1, characterized in that: The manual transmission device of the valve adopts a design of ball screw and needle bearing combination, and no matter manual control or hydraulic control, the ball screw can be flexibly rotated in a circumferential direction, and the rotating torque is very small.

5. A high-pressure flat gate valve integrated with a hand liquid according to claim 1, characterized in that: The two ends of the gate and the head of the valve stem are designed with T-shaped grooves, the gate and the valve stem are connected through the T-shaped grooves, and under the condition that the interior of the valve is subjected to pressure, the gate and the valve stem can be opened or closed without being in the same perpendicular state.

6. A high-pressure flat gate valve integrated with a hand liquid according to claim 1, characterized in that: The interior of the valve is designed with a sand baffle, the sand baffle is closely arranged on both sides of the gate flow hole, when the valve is closed, the sand in the gate flow hole is prevented from falling into the valve cavity, when the valve is opened, the sand in the gate flow hole is discharged from the valve cavity along with the fluid, and the sand prevention function of the interior of the valve is realized.

7. A high-pressure flat gate valve integrated with a hand liquid according to claim 1, characterized in that: The periphery of the valve cover is designed with symmetrical grease injection holes and pressure relief holes, and a grease valve and a pressure relief valve are respectively arranged in the grease injection holes and the pressure relief holes, when the interior of the valve cannot be sealed, the interior of the valve can be injected with sealing grease through the grease valve for sealing the valve, when there is excess pressure in the interior of the valve and the valve cannot be removed, the excess pressure in the interior of the valve can be discharged through the pressure relief valve, and the safety hazard on site is avoided.

8. A high-pressure flat gate valve integrated with a hand liquid according to claim 1, characterized in that: The lower cylinder cover and the support sleeve are both designed with air outlet holes. When the packing seal ring between the valve rod and the valve cover fails to seal, the leaked fluid will flow out from the air outlet holes of the lower cylinder cover or the support sleeve, releasing the pressure inside the valve and avoiding damage to the oil cylinder or the ball screw by fluid pressure.

9. A high-pressure flat gate valve integrated with a hand liquid according to claim 1, characterized in that: The indicating rod is installed on the valve rod. By observing the displacement of the indicating rod externally, it can be determined whether the valve inside is completely opened or closed.

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