Check valve of water injection well

Abstract

The invention provides a check valve for a water injection well, and relates to the field of check valves. A moving groove with the top end closed is formed in the middle of the interior of the check valve body, a uniflow control sealing head capable of rising under stress is installed in the moving groove, the interior of the uniflow control sealing head with the bottom edge of an inclined structure is of a T-shaped shaft structure, and an automatic dredging rod of an inverted-U-shaped structure is fixed to the outer portion of the uniflow control sealing head. And conical blocks which are uniformly arranged are respectively arranged on two sides of the automatic dredging rod. Water flow impacts the uniflow control sealing head to automatically ascend, while the uniflow control sealing head ascends, the automatic dredging rod is driven to be located in the diversion groove to move together, the automatic dredging rod automatically dredges the diversion groove through the conical block, the diversion groove is prevented from being blocked, and the problem that a common water injection well uniflow valve is poor in dredging effect is solved. Due to more impurities in underground water and overlarge pressure difference, the interior of the check valve is extremely easy to block, and the check valve needs to be disassembled for maintenance and is relatively tedious.

Description

Technical Field

[0001] The invention relates to the technical field of check valves, and in particular to a check valve for water injection wells. Background Art

[0002] An injection well is a well used to inject water into an oil layer. Water is injected into the oil reservoir through the injection well to maintain or restore the oil layer pressure. The outlet pipe of the injection well needs to be connected to a check valve so that the check valve controls the one-way flow of water to avoid water backflow. However, the common check valves for injection wells on the market are easily clogged due to the large amount of impurities in groundwater and excessive pressure difference. They need to be disassembled for maintenance, which is cumbersome and affects their use. The inside of the check valve is usually assisted by a rust-proof spring to stop the flow. After long-term use, the elasticity of the rust-proof spring will decrease and the sealing strength will weaken. After the elasticity of the rust-proof spring decays, it is difficult to replace it. The connection between the check valve and the pipeline is prone to leakage. After leakage, it cannot be discovered in time, which will cause the leakage to become more and more serious. Summary of the invention

[0003] In view of this, the present invention provides a water injection well check valve to solve the problem that the common water injection well check valve is easily blocked inside due to the large amount of impurities in the groundwater and the excessive pressure difference, and needs to be disassembled for maintenance, which is cumbersome and affects the use.

[0004] The present invention provides a water injection well check valve, specifically comprising: a check valve body; joints connected to a water pipe are provided at the upper and lower ends of the check valve body, a movable groove with a closed top is provided at the middle position inside the check valve body, a single-flow control sealing head that can be forced to rise is installed inside the movable groove, the single-flow control sealing head with an inclined bottom edge has a T-shaped shaft structure inside, and a thread is provided on the inner wall of the single-flow control sealing head, an automatic dredging rod with an inverted U-shaped structure is fixed to the outside of the single-flow control sealing head, and moves up and down with the single-flow control sealing head, and evenly arranged conical blocks are respectively provided on both sides of the automatic dredging rod; an internal component, the internal component of the circular structure is inside the check valve body, and is installed at the inner top of the movable groove The bottom of the internal component is provided with a rust-proof spring, and the bottom of the rust-proof spring is connected to the rotating extrusion component, which is installed inside the single-flow control sealing head through threads, and the bottom of the rotating extrusion component is fixedly connected to the control component, and drives the control component to move together; the sealing structure, the two sealing structures made of flexible rubber material are respectively located at the upper and lower ends of the single-flow valve body, and are respectively installed on the outside of the two joints, and a contact ring made of flexible rubber material is fixed at the bottom end of the sealing structure, and the cross-section of the contact ring of the circular ring structure is a triangular structure, and the sealing structure is connected to the limit stop ring through a connecting structure, and a guide tube structure with an L-shaped tubular structure is fixed on both sides of the limit stop ring, and the interior of the guide tube structure is connected to the inner side of the limit stop ring.

[0005] Optionally, the bottom of the movable groove is connected to the interior of the joint below, and the connection position is an inclined structure. A U-shaped diverter groove is provided on both sides of the movable groove, and the top of the diverter groove is connected to the interior of the joint at the top. An automatic dredging rod is inserted into the interior of the diverter groove and moves up and down inside the diverter groove; a fixed component of a rectangular pipe structure is installed on the side of the one-way valve body by bolts, and the fixed component is connected to the internal top of the movable groove through a channel. The outside of the fixed component is a T-shaped shaft tubular structure, and the outer end of the fixed component is connected to the rotating adjustment handle and is free to rotate at the outer end of the fixed component. A threaded hole for manipulation is provided inside the fixed component; a pressing component is inserted into the interior of the fixed component, and is free to be pulled inside the pressing component. The outer end of the pressing component with a wedge-shaped structure at the inner end is connected to the adjusting component and moves together. The inner end of the pressing component is at the internal top of the movable groove, and the adjusting component with a thread on the outside is inserted into the threaded hole and rotates freely.

[0006] Optionally, a positioning component for positioning an anti-rust spring is fixed to the bottom end of the internal component, and a force-bearing displacement groove is provided on the top side of the internal component, and a pressing component is inserted into the force-bearing displacement groove. After the pressing component is inserted inward, the downward displacement of the internal component is controlled by the force-bearing displacement groove; an external pulling rod with an L-shaped structure is fixed on both sides of the outer end of the internal component, and the external pulling rod is inside the channel, and a pushing component with a semi-annular structure is fixed to the bottom of the inner end of the internal component; three evenly arranged insert teeth are fixed to the inner bottom of the pushing component, and the cross-section of the insert teeth is a wedge-shaped structure, and the control component passes through the single-flow control sealing head and protrudes from the joint with the bottom end.

[0007] Optionally, the outside of each sealing structure is provided with a connecting hole for inserting a connecting bolt, and a ring-arranged connecting structure is fixed to the outside of the sealing structure; the outer end of the connecting structure is fixedly connected to a limit stop ring, the inner side of the limit stop ring made of flexible rubber material fits the edge position of the joint, and an auxiliary sealing ring is fixed at the angle edge position of the limit stop ring; a trigger rod structure with a T-shaped axis structure is inserted into the inside of each guide tube structure, and is freely pulled up and down inside the guide tube structure, and an identification head structure painted with an identification color is fixed to the outer end of the guide tube structure, and moves with the guide tube structure.

[0008] The water injection well check valve provided by the present invention has the following beneficial effects: When draining, the water flow impacts the single-flow control sealing head and automatically rises. While the single-flow control sealing head rises, it drives the automatic dredging rod inside the diverter groove to move together. The automatic dredging rod automatically dredges the diverter groove through the tapered block to avoid blockage in the diverter groove.

[0009] After the elasticity of the rust-proof spring decays, remove the one-flow valve body and the fixed assembly, rotate the control component, and detach the rotating extrusion component from the inside of the single-flow control sealing head. Push the control component and the rotating extrusion component to compress the rust-proof spring, and then control the movement of the internal components through the external pulling rod. The internal components push the rust-proof spring to be quickly discharged through the pushing component, and then squeeze the new rust-proof spring and reinstall it into the movable groove through the channel to facilitate the replacement of the rust-proof spring.

[0010] The sealing structure drives the contact ring to be installed together. The inclined surface of the contact ring contacts the internal angle of the water pipe to improve the sealing strength and reduce the leakage effect. At the same time, after water seepage, water enters the interior of the guide tube structure with the help of pressure, and uses the pressure to push the trigger rod structure up. The trigger rod structure drives the identification head structure to move and displace, which is convenient for workers to detect water seepage in time during inspection and facilitate timely maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0012] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0013] In the attached picture: Figure 1 It is a three-dimensional structural schematic diagram of a check valve according to an embodiment of the present invention.

[0014] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of a check valve according to an embodiment of the present invention.

[0015] Figure 3 It is a schematic diagram of an overall partial cross-sectional exploded three-dimensional structure of a check valve according to an embodiment of the present invention.

[0016] Figure 4 It is a schematic diagram of the overall partial cross-section exploded bottom view of the one-flow valve of an embodiment of the present invention.

[0017] Figure 5 It is a schematic diagram of a partially assembled three-dimensional structure of a check valve according to an embodiment of the present invention.

[0018] Figure 6 It is a schematic diagram of a partial cross-section exploded three-dimensional structure of a valve body of a check valve according to an embodiment of the present invention.

[0019] Figure 7 It is a bottom view structural diagram of the internal components of the one-flow valve according to an embodiment of the present invention.

[0020] Figure 8 It is a schematic diagram of the three-dimensional and partial cross-sectional structure of the sealing structure of the check valve according to an embodiment of the present invention.

[0021] Reference numerals list 1. Check valve body; 101. Moving groove; 102. Diverter groove; 103. Check valve sealing head; 104. Automatic dredging rod; 105. Fixed assembly; 106. Rotating adjustment handle; 107. Pressing assembly; 108. Adjustment assembly; 2. Internal components; 201. Positioning components; 202. Force displacement grooves; 203. External pull rods; 204. Push components; 205. Insertion gears; 206. Rotating extrusion components; 207. Control components; 3. Sealing structure; 301. Contact ring; 302. Connection hole; 303. Connection structure; 304. Limit stop ring; 305. Auxiliary sealing ring; 306. Guide tube structure; 307. Trigger rod structure; 308. Marking head structure. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0023] Example 1: Please refer to Figures 1 to 8 As shown: The present invention provides a water injection well check valve, comprising a check valve body 1; the upper and lower ends of the check valve body 1 are provided with joints connected to a water pipe for connection with the water pipe for use; a movable groove 101 with a sealed top is provided in the middle position inside the check valve body 1; a single-flow control sealing head 103 capable of being forced to rise is installed inside the movable groove 101, and moves downward with the help of a rust-proof spring power to seal the inside of the check valve body 1; the single-flow control sealing head 103 with an inclined bottom edge has a T-shaped shaft structure inside, which is used to install a control component 207 and a rotating extrusion component 206, and a single-flow control sealing head 103 is provided with a T-shaped shaft structure ... A thread is provided on the inner wall of 103, an inverted U-shaped automatic dredging rod 104 is fixed to the outside of the single-flow control sealing head 103, and moves up and down with the single-flow control sealing head 103. Both sides of the automatic dredging rod 104 are respectively provided with evenly arranged conical blocks, which move with the automatic dredging rod 104 and are located inside the diverter groove 102 to automatically dredge and avoid blockage; the internal component 2, the circular structure of the internal component 2 is located inside the single-flow valve body 1, and is installed at the top of the inner part of the moving groove 101, and the bottom of the internal component 2 is installed with a rust-proof spring, and the bottom of the rust-proof spring is connected to the rotating extrusion part The rotating extrusion component 206 is connected to the single-flow control sealing head 103, so that the rust-proof spring can be pushed up by the rotating extrusion component 206, and the rust-proof spring can be squeezed out. The rotating extrusion component 206 is installed inside the single-flow control sealing head 103 through a thread. The bottom of the rotating extrusion component 206 is fixedly connected to the control component 207, and drives the control component 207 to move together. The movement of the rotating extrusion component 206 is conveniently controlled by the control component 207; the sealing structure 3, the two sealing structures 3 made of flexible rubber material are respectively located at the upper and lower ends of the single-flow valve body 1, and are respectively installed on the outside of the two joints. The bottom end of the sealing structure 3 is fixed with a flexible rubber material The contact ring 301 of the circular ring structure has a triangular cross-section. It contacts the angle position of the water pipe through the inclined surface to improve the sealing effect and reduce the probability of water seepage. The sealing structure 3 is connected to the limit retaining ring 304 through the connecting structure 303. A guide tube structure 306 of an L-shaped tubular structure is fixed on both sides of the limit retaining ring 304. The interior of the guide tube structure 306 is connected to the inner side of the limit retaining ring 304. After water seepage, water enters the interior of the guide tube structure 306 to push the trigger rod structure 307 to rise, thereby controlling the movement of the identification head structure 308, which is convenient for inspection personnel to find.

[0024] refer to Figure 6The bottom of the movable groove 101 is connected to the interior of the joint below, and the connection position is an inclined structure, which is used to fit and seal with the bottom of the single-flow control sealing head 103. A U-shaped diverter groove 102 is provided on both sides of the movable groove 101. The top of the diverter groove 102 is connected to the interior of the joint at the top to divert and discharge water. An automatic dredging rod 104 is inserted into the interior of the diverter groove 102, and moves up and down inside the diverter groove 102 to automatically dredge the interior of the diverter groove 102; a fixing component 105 of a rectangular pipe structure is installed on the side of the one-way valve body 1 by bolts, and the fixing component 105 is connected to the internal top of the movable groove 101 through a channel to seal the channel. The outside of the fixing component 105 is a T-shaped shaft tubular structure, and the outer end of the fixing component 105 is connected to the rotating adjustment handle 106, and is freely rotated at the outer end of the fixing component 105, and can be freely controlled and rotated for use. A threaded hole for manipulation is provided inside 105 to control the movement of the adjustment component 108 and the pressing component 107; the pressing component 107 is inserted into the interior of the fixed component 105 and is freely pulled out inside the pressing component 107. The outer end of the pressing component 107, which has a wedge-shaped structure at the inner end, is connected to the adjustment component 108 and moves together. The inner end of the pressing component 107 is inserted into the inside of the force displacement groove 202. After the rotating adjustment handle 106 is rotated, the adjustment component 108 and the pressing component 107 are controlled to move together through the thread. The pressing component 107 controls the internal component 2 to move downward, squeezes the anti-rust spring, increases the pushing strength of the single-flow control sealing head 103, and adjusts the flow of water. The inner end of the pressing component 107 is at the inner top of the movable groove 101, and the adjustment component 108 with a thread on the outside is inserted into the threaded hole and rotates freely, and the position is adjusted by the thread.

[0025] refer to Figure 7A positioning component 201 for positioning the anti-rust spring is fixed at the bottom end of the internal component 2 to prevent the anti-rust spring from deviating and misaligning. A force displacement groove 202 with a wedge-shaped structure is provided on the top side of the internal component 2. The pressure component 107 is inserted into the force displacement groove 202. After the pressure component 107 is inserted inward, the downward displacement of the internal component 2 is controlled by the force displacement groove 202; an L-shaped external pull rod 203 is fixed on both sides of the outer end of the internal component 2. The external pull rod 203 is inside the channel, which is convenient for pulling the internal component 2 through the external pull rod 203 Move outward to take it out. A pushing component 204 with a semi-annular structure is fixed to the bottom of the inner end of the internal component 2 to push the compressed anti-rust spring to take it out. Three evenly arranged insert teeth 205 are fixed to the inner bottom of the pushing component 204. The cross-section of the insert teeth 205 is a wedge-shaped structure, which is used to block the rotating extrusion component 206 to prevent the rotating extrusion component 206 from rising excessively. At the same time, it can block the spring from being taken out after compression. The control component 207 passes through the single-flow control sealing head 103 and protrudes from the joint with the bottom end, so that the control joint can be easily raised after the single-flow valve body 1 is disassembled.

[0026] refer to Figure 8 , each sealing structure 3 is provided with a connecting hole 302 for inserting a connecting bolt on the outside, which is convenient for the use of the connecting bolt. A ring-shaped connecting structure 303 is fixed on the outside of the sealing structure 3 for connecting with a limit stop ring 304; the outer end of the connecting structure 303 is fixedly connected to the limit stop ring 304, and the inner side of the limit stop ring 304 made of flexible rubber material fits the edge of the joint to assist in sealing. An auxiliary sealing ring 305 is fixed at the edge of the angle of the limit stop ring 304; a trigger rod structure 307 of a T-shaped shaft structure is inserted into the inside of each guide tube structure 306, and is freely pulled up and down inside the guide tube structure 306, and automatically moves after being compressed, and an identification head structure 308 painted with an identification color is fixed on the outer end of the guide tube structure 306, and moves with the guide tube structure 306. After moving, it reminds the inspection personnel to perform maintenance.

[0027] Embodiment 2: The sealing structure 3 can be freely selected to be installed according to the use requirements, which is convenient for reducing the use cost.

[0028] Specific usage and function of this embodiment: In the present invention, firstly, two sealing structures 3 are controlled to be installed on the outside of two joints respectively, and then the connection between the pipeline and the joint is controlled, the inner angle of the joint contacts with the contact ring 301, and then the connecting bolt is controlled to connect the joint with the water pipe, the sealing structure 3 is squeezed and sealed, and the sealing and anti-seepage effects are improved, and then the rotation adjustment handle 106 is controlled to rotate, and the rotation adjustment handle 106 controls the movement of the adjustment component 108 through the threaded hole, and at the same time drives the pressing component 107 to move inside the force displacement groove 202, and the internal component 2 is pressed to adjust the position, and the anti-rust spring is compressed to adjust the flow rate. When the water is delivered in one direction, the water flows, and the single-flow control sealing head 103 is pushed up together, and the diverter groove 102 is automatically opened, and the water is controlled to be delivered through the diverter groove 102 and the joint. The single-flow control sealing head 103 moves together with the automatic dredging rod 104, and the automatic dredging rod 104 and the conical block are in the internal displacement of the diverter groove 102, and the diverter groove 102 is opened. The interior is automatically unblocked to avoid blockage. When water seeps at the joint connection position, water enters the interior of the guide tube structure 306. The guide tube structure 306 uses pressure to push the trigger rod structure 307 to move, and the trigger rod structure 307 drives the identification head structure 308 to move together, so that the inspection personnel can find water leakage in time and carry out timely maintenance. When the elasticity of the anti-rust spring decays, the one-way valve body 1 and the fixing component 105 can be controlled to be disassembled, and then the control component 207 is controlled to rotate, and the rotating extrusion component 206 is detached from the inside of the single-flow control sealing head 103 to release the fixation, and then the control component 207 and the rotating extrusion component 206 are pushed up, and the rotating extrusion component 206 squeezes the anti-rust spring, and then the internal component 2 and the pushing component 204 are driven to move together through the external pulling rod 203, and the pushing component 204 takes out the compressed anti-rust spring, and then the new anti-rust spring is compressed and reinstalled in the movable groove 101 through the channel, so as to improve the convenience of replacement.

Claims

1. A check valve for water injection wells, characterized in that: include: A one-way valve body (1); the one-way valve body (1) is provided with joints for connecting to a water pipe at both ends thereof; a movable groove (101) with a sealed top end is provided in the middle position of the one-way valve body (1); a one-way control sealing head (103) capable of being lifted by force is installed inside the movable groove (101); the one-way control sealing head (103) having an inclined bottom edge has a T-shaped shaft structure inside, and a thread is provided on the inner wall of the one-way control sealing head (103); an automatic dredging rod (104) having an inverted U-shaped structure is fixed outside the one-way control sealing head (103) and moves up and down with the one-way control sealing head (103); and conical blocks arranged evenly are provided on both sides of the automatic dredging rod (104); an internal component (2); the internal component (2) having a circular structure is located inside the one-way valve body (1) and is installed at the top end of the movable groove (101); an anti-rust spring is installed at the bottom of the internal component (2); The bottom of the rust-proof spring is connected to the rotating extrusion component (206), which is installed inside the single-flow control sealing head (103) through threads. The bottom of the rotating extrusion component (206) is fixedly connected to the control component (207) and drives the control component (207) to move together; a sealing structure (3), wherein the two sealing structures (3) made of flexible rubber material are respectively located at the upper and lower ends of the single-flow valve body (1) and are respectively installed outside the two joints, a contact ring (301) made of flexible rubber material is fixed at the bottom end of the sealing structure (3), and the cross section of the contact ring (301) with a circular ring structure is a triangular structure, the sealing structure (3) is connected to the limit stop ring (304) through the connecting structure (303), and a guide tube structure (306) with an L-shaped tubular structure is fixed on both sides of the limit stop ring (304), and the inside of the guide tube structure (306) is connected to the inner side of the limit stop ring (304).

2. A water injection well check valve as claimed in claim 1, characterized in that: The bottom of the movable groove (101) is connected to the interior of the joint below, and the connection position is an inclined structure. A U-shaped diversion groove (102) is provided on both sides of the movable groove (101). The top of the diversion groove (102) is connected to the interior of the joint at the top. An automatic dredging rod (104) is inserted into the interior of the diversion groove (102) and moves up and down inside the diversion groove (102).

3. A water injection well check valve as claimed in claim 2, characterized in that: A fixing assembly (105) having a rectangular pipe structure is installed on the side of the check valve body (1) by means of bolts. The fixing assembly (105) is connected to the inner top of the movable groove (101) through a channel. The outside of the fixing assembly (105) is a T-shaped shaft tubular structure. The outer end of the fixing assembly (105) is connected to a rotating adjustment handle (106) and is freely rotatable at the outer end of the fixing assembly (105). A threaded hole for manipulation is provided inside the fixing assembly (105).

4. A water injection well check valve as claimed in claim 3, characterized in that: The fixing component (105) has a pressing component (107) inserted therein and is freely withdrawn from the pressing component (107). The pressing component (107) has a wedge-shaped inner end and its outer end is connected to the adjusting component (108) and moves together. The inner end of the pressing component (107) is located at the inner top end of the movable groove (101). The adjusting component (108) has a threaded outer end and is inserted into the threaded hole and is freely rotatable.

5. A water injection well check valve as claimed in claim 4, characterized in that: A positioning component (201) for positioning the rust-proof spring is fixed at the bottom end of the internal component (2), and a force displacement groove (202) with a wedge-shaped structure is provided on the top side of the internal component (2). A pressing component (107) is inserted into the internal part of the force displacement groove (202). After the pressing component (107) is inserted inwardly, the internal component (2) is controlled to move downward through the force displacement groove (202).

6. A water injection well check valve as claimed in claim 1, characterized in that: An L-shaped external pulling rod (203) is fixed to both sides of the outer end of the internal component (2), the external pulling rod (203) is located inside the channel, and a semi-annular pushing component (204) is fixed to the bottom of the inner end of the internal component (2).

7. A water injection well check valve as claimed in claim 6, characterized in that: Three evenly arranged insert teeth (205) are fixed to the inner bottom end of the pushing component (204), and the cross section of the insert teeth (205) is a wedge-shaped structure. The control component (207) penetrates the single-flow control sealing head (103) and protrudes from the joint with the bottom end.

8. A water injection well check valve as claimed in claim 1, characterized in that: The outside of each sealing structure (3) is provided with a connection hole (302) for inserting a connection bolt, and the outside of the sealing structure (3) is fixed with a ring-shaped connection structure (303).

9. A water injection well check valve as claimed in claim 8, characterized in that: The outer end of the connection structure (303) is fixedly connected to the limit stop ring (304), the inner side of the limit stop ring (304) made of flexible rubber material fits the edge of the joint, and an auxiliary sealing ring (305) is fixed at the angle edge of the limit stop ring (304).

10. A water injection well check valve as claimed in claim 1, characterized in that: A trigger rod structure (307) with a T-shaped shaft structure is inserted into the interior of each guide tube structure (306) and can be freely pulled up and down inside the guide tube structure (306). An identification head structure (308) painted with identification color is fixed to the outer end of the guide tube structure (306) and moves along with the guide tube structure (306).

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