Hydraulically-driven wellhead sealing valve

Abstract

The utility model relates to the technical field of valve design and machining, in particular to a hydraulically-driven wellhead sealing valve which comprises a control hydraulic cylinder, and a flange plate is arranged outside the bottom end of the control hydraulic cylinder. A T-shaped groove is formed in the bottom end of the movable block, the gear rod is arranged in the T-shaped groove and can rotate in the movable block, the gear rod is in meshed connection with the circular ring gear, the circular ring gear is in meshed connection with the rotating bolt, a groove is formed in the surface of the gear rod, a small spring is arranged in the groove, and a sealing ring is connected to the top end of the small spring; the surface of the piston is connected with a return spring; the device has the beneficial effects that liquid is added, a piston downwards extrudes a return spring, the bottom of the piston blocks a pipeline, a rotating bolt is rotated to adjust a movable block to move up and down, the movable block downwards moves, the liquid enters a groove of a control hydraulic cylinder, the return spring enables the piston to reset, and the liquid normally flows out; and the oil feeding hole is prevented from being abraded and unstable in sealing due to the fact that the oil feeding hole is opened for multiple times.

Description

Technical Field

[0001] The utility model relates to the field of valve design and processing, in particular to a hydraulically driven wellhead sealing valve. Background Art

[0002] The valve is a control component in the fluid delivery system, with functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. The valve is a device used to control the direction, pressure and flow of the fluid in the fluid system. It is a device that allows the medium (liquid, gas, powder) in the pipes and equipment to flow or stop and control its flow;

[0003] In the prior art, a valve uses a liquid with high air pressure to control the fluid in another pipeline with low air pressure. By utilizing the low compressibility of the liquid, the required valve can be controlled in time.

[0004] However, since the liquid is volatile, adding liquid multiple times will cause the liquid to volatilize when it comes into contact with air, which will lead to liquid waste and may also damage the sealing of the valve. Utility Model Content

[0005] The utility model aims to provide a hydraulically driven wellhead sealing valve to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a hydraulically driven wellhead sealing valve, the hydraulically driven wellhead sealing valve comprising:

[0007] A control cylinder, wherein a flange is arranged on the outside of the bottom end of the control cylinder;

[0008] A movable block, a T-shaped groove is provided at the bottom of the movable block, a gear rod is inside the T-shaped groove, the gear rod can rotate inside the movable block, the gear rod is meshed with the annular gear, the annular gear is meshed with the rotating bolt, a groove is provided on the surface of the gear rod, a small spring is provided inside the groove, and a sealing ring is connected to the top of the small spring;

[0009] A piston, a return spring is connected to the surface of the piston.

[0010] Preferably, grooves are provided at the end and bottom of the control hydraulic cylinder, a hydraulic cylinder cover is provided in the end groove, an oil supply hole is provided in the middle of the hydraulic cylinder cover, and a hydraulic cylinder base is provided in the bottom groove.

[0011] Preferably, the flange is bolted to the valve seat via threaded holes, and a liquid outflow channel and a liquid inflow channel are provided inside the valve seat.

[0012] Preferably, a groove is provided inside the control liquid cylinder, a movable block is provided in the groove, a bolt hole is opened on the surface of the control liquid cylinder, a ring gear is provided in the bolt hole, a ring gear is provided inside the control liquid cylinder, the ring gear is meshed with the gear rod, and the ring gear is meshed with the rotating bolt.

[0013] Preferably, the piston is inside the control cylinder, a return spring is connected to the surface of the piston, and the bottom end of the return spring is connected to the hydraulic cylinder base.

[0014] Preferably, the cross-section of the piston is T-shaped, the cross-section of the gear rod is T-shaped, the gear rod is provided with four groups, the small springs are provided with four groups, and the return springs are provided with four groups.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model proposes that after adding liquid with high air pressure, the oil supply hole is sealed, and when the air pressure of the added liquid is greater than that of the liquid flowing out of the pipeline, the piston presses the return spring downward, and the bottom of the piston blocks the channel, and the rotating bolt is rotated to adjust the movable block to move up and down. When the movable block moves downward, the liquid will enter the inner groove of the control liquid cylinder, the return spring resets the piston, and the liquid flows out normally, thereby preventing the liquid from volatilizing in contact with the air and the oil supply hole from being worn due to repeated opening, and the seal being unstable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0020] In the figure: 1 oil supply hole, 2 control cylinder, 3 threaded hole, 4 valve seat, 5 rotating bolt, 6 hydraulic cylinder cover,

[0021] 7 movable block, 8 piston, 9 return spring, 10 ring gear, 11 hydraulic cylinder base, 12 liquid outflow channel, 13 liquid inflow channel, 14 gear rod, 15 small spring, 16 sealing ring, 17 flange. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] See also Figure 1-Figure 3 The utility model provides a technical solution: a hydraulically driven wellhead sealing valve comprises: a control cylinder 2, a flange 17 is arranged on the outside of the bottom end of the control cylinder 2; a movable block 7, a T-shaped groove is arranged on the bottom end of the movable block 7, a gear rod 14 is inside the T-shaped groove, the gear rod 14 can rotate inside the movable block 7, the gear rod 14 is meshed and connected with the annular gear 10, the annular gear 10 is meshed and connected with the rotating bolt 5, a groove is opened on the surface of the gear rod 14, a small spring 15 is arranged inside the groove, and a sealing ring 16 is connected to the top of the small spring 15; a piston 8, a return spring 9 is connected to the surface of the piston 8, grooves are arranged at the end and bottom of the control cylinder 2, a hydraulic cylinder cover 6 is arranged in the end groove, an oil supply hole 1 is arranged in the middle of the hydraulic cylinder cover 6, and a hydraulic cylinder base 11 is arranged in the bottom groove, the rotating bolt 5 drives the annular gear 10 to rotate, the annular gear 10 drives the gear rod 14 to move downward, the gear rod 14 drives the movable block 7 to move, and the sealing ring 16 on the movable block 7 ensures that the liquid does not leak out.

[0025] Embodiment 2

[0026] On the basis of embodiment one, the flange 17 is bolted to the valve seat 4 through the threaded hole 3, the interior of the valve seat 4 is provided with a liquid outflow channel 12 and a liquid inflow channel 13, the interior of the control liquid cylinder 2 is provided with a groove, a movable block 7 is provided in the groove, a bolt hole is opened on the surface of the control liquid cylinder 2, a ring gear 10 is provided in the bolt hole, a ring gear 10 is provided inside the control liquid cylinder 2, the ring gear 10 is meshed with the gear rod 14, and the ring gear 10 is meshed with the rotating bolt 5, which can drive the movable block 7 to move up and down to make the liquid flow.

[0027] Embodiment 3

[0028] On the basis of the second embodiment, the piston 8 is inside the control cylinder 2, the surface of the piston 8 is connected to the return spring 9, the bottom end of the return spring 9 is connected to the hydraulic cylinder base 11, the cross-section of the piston 8 is T-shaped, the cross-section of the gear rod 14 is T-shaped, the gear rod 14 is provided with four groups, the small spring 15 is provided with four groups, the return spring 9 is provided with four groups, the piston 8 presses the return spring 9, and the bottom end of the piston 8 blocks the pipeline.

[0029] In actual use, the valve seat 4 is installed on the wellhead, and the liquid is added into the control fluid cylinder 2 through the oil supply hole 1, the oil supply hole 1 is blocked, the piston 8 presses the return spring 9, and the bottom end of the piston 8 blocks the pipeline. The rotating bolt 5 drives the annular gear 10 to rotate, and the annular gear 10 drives the gear rod 14 to move downward, and the gear rod 14 drives the movable block 7 to move. The sealing ring 16 on the movable block 7 ensures that the liquid does not leak out, and the liquid in the control fluid cylinder 2 enters the groove of the control fluid cylinder 2, the return spring 9 returns to its position, and the liquid inflow channel 13 and the liquid outflow channel 12 are connected. If the pipeline is blocked, the rotating bolt 5 can be reversed to make the liquid return to the control fluid cylinder 2.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulically driven wellhead sealing valve, characterized in that: The hydraulically driven wellhead sealing valve comprises: A control fluid cylinder (2), wherein a flange (17) is disposed on the outside of the bottom end of the control fluid cylinder (2); A movable block (7), a T-shaped groove is provided at the bottom end of the movable block (7), a gear rod (14) is inside the T-shaped groove, the gear rod (14) can rotate inside the movable block (7), the gear rod (14) is meshedly connected with the annular gear (10), the annular gear (10) is meshedly connected with the rotating bolt (5), a groove is provided on the surface of the gear rod (14), a small spring (15) is provided inside the groove, and a sealing ring (16) is connected to the top end of the small spring (15); A piston (8) is provided, and a return spring (9) is connected to the surface of the piston (8).

2. A hydraulically driven wellhead sealing valve according to claim 1, characterized in that: The control cylinder (2) is provided with grooves at the end and the bottom, a hydraulic cylinder cover (6) is provided in the end groove, an oil supply hole (1) is provided in the middle of the hydraulic cylinder cover (6), and a hydraulic cylinder base (11) is provided in the bottom groove.

3. A hydraulically driven wellhead sealing valve according to claim 2, characterized in that: The flange (17) is bolted to the valve seat (4) via a threaded hole (3), and a liquid outflow channel (12) and a liquid inflow channel (13) are provided inside the valve seat (4).

4. A hydraulically driven wellhead sealing valve according to claim 3, characterized in that: The control cylinder (2) is provided with a groove inside, a movable block (7) is provided in the groove, a bolt hole is provided on the surface of the control cylinder (2), a circular ring gear (10) is provided in the bolt hole, a circular ring gear (10) is provided inside the control cylinder (2), the circular ring gear (10) is meshedly connected with the gear rod (14), and the circular ring gear (10) is meshedly connected with the rotating bolt (5).

5. A hydraulically driven wellhead sealing valve according to claim 4, characterized in that: The piston (8) is inside the control cylinder (2), the surface of the piston (8) is connected to a return spring (9), and the bottom end of the return spring (9) is connected to a hydraulic cylinder base (11).

6. A hydraulically driven wellhead sealing valve according to claim 5, characterized in that: The cross section of the piston (8) is T-shaped, the cross section of the gear rod (14) is T-shaped, the gear rod (14) is provided with four groups, the small spring (15) is provided with four groups, and the return spring (9) is provided with four groups.

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