Flow regulating valve for geological storage well

Abstract

The utility model discloses a flow regulating valve for a geological storage well, which relates to the technical field of oil and gas field storage engineering and comprises a valve body and a pipe body, the valve body is positioned above the pipe body, penetrates through the pipe body and is communicated with the pipe body, and the valve body and the pipe body are provided with a sealing mechanism. The sealing mechanism comprises sealing boxes symmetrically arranged on the two sides of the joint of the valve body and the pipe body in a sleeving mode, mounting boxes and fixing blocks are mounted on the front faces and the back faces of the two sealing boxes correspondingly, fixing columns are fixedly mounted at the upper ends and the lower ends of the sides, close to the mounting boxes, of the fixing blocks, and the other ends of the fixing columns penetrate into the mounting boxes. A sealing block is installed on the inner side wall of the sealing box and attached to the outer side wall of the valve body and the outer side wall of the pipe body. According to the utility model, the sealing boxes are symmetrically arranged on the two sides of the joint of the valve body and the pipe body, and the fitting degree of the sealing surfaces is ensured through uniformly distributed pressing force, so that leakage caused by single-side stress is avoided.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas field sealing engineering technology, specifically a flow regulating valve for geological sealing wells. Background Technology

[0002] Geological sequestration technology is an important means of reducing emissions of greenhouse gases such as carbon dioxide. Its core is to inject captured CO2 into deep underground geological structures for long-term sequestration. In this process, flow control valves are one of the key devices used to precisely control the injection rate and pressure of CO2 to ensure the safety and stability of the sequestration process. However, existing flow control valves still have some technical problems in practical applications, especially in high-pressure and highly corrosive environments, where the sealing performance at the connection between the control valve and the pipeline is often difficult to guarantee.

[0003] Traditional flow control valves mostly use flange or threaded connections. Although these can meet the sealing requirements under normal operating conditions, in the special environment of CO2 geological storage wells, due to factors such as high pressure, strong corrosiveness, and temperature fluctuations of the medium, leakage is prone to occur at the connection. Flange connections may develop micro-gaps under dynamic loads, such as pressure pulsation or vibration, while threaded connections are prone to loosening or fatigue fracture under high stress conditions. Temperature changes during CO2 injection may cause thermal expansion and contraction of metal parts, further aggravating the gap between the sealing interfaces. In existing technologies, some improvement solutions improve sealing performance by increasing the number of sealing rings or using high-performance materials, such as metal spiral wound gaskets, but they still cannot completely solve the reliability problem under long-term service. Complex sealing structures may increase maintenance costs and installation difficulty, and are not conducive to disassembly and replacement. Utility Model Content

[0004] The purpose of this invention is to provide a flow regulating valve for geological storage wells to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a flow regulating valve for geological storage wells, including a valve body and a pipe body. The valve body is located above the pipe body and penetrates and communicates with the pipe body. The valve body and the pipe body are provided with a sealing mechanism, which includes symmetrically fitted sealing boxes on both sides of the joint between the valve body and the pipe body. The front and back of the two sealing boxes are equipped with mounting boxes and fixing blocks. The fixing blocks have fixing columns fixedly installed at the upper and lower ends of the side near the mounting box. The other end of the fixing column penetrates into the mounting box. The inner side wall of the sealing box is equipped with a sealing block, which fits against the outer side wall of the valve body and the pipe body.

[0006] Furthermore, the mounting box is provided with a locking mechanism, which includes a threaded column rotatably connected to the upper and lower surfaces of the mounting box, a rotating column rotatably connected to the middle section of the inner wall of the mounting box, a driving bevel gear fixedly mounted on the fixing block, driven bevel gears meshing above and below the driving bevel gear, two driven bevel gears fixedly connected to the two threaded columns respectively at their close ends, threaded blocks threadedly connected to the two threaded columns, clamping plates fixedly mounted on the threaded blocks, and two clamping plates abutting against the two fixing columns respectively.

[0007] Furthermore, the fixed post has an installation groove at one end inside the mounting box, and the installation groove is movably connected to the threaded post.

[0008] Furthermore, a sliding groove is provided on the side of the mounting box near the fixing block, and a slider is fixedly installed on the threaded block, with the slider slidably connected to the sliding groove.

[0009] Furthermore, the longitudinal section of the clamping piece is semi-arc and fits against the outer arc wall of the mounting groove.

[0010] Furthermore, a rotating handle is rotatably connected to the outer surface of the mounting box, and the rotating handle passes through the mounting box and is fixedly connected to the drive bevel gear.

[0011] Furthermore, the sealing block is made of silicone, and both the sealing block and the sealing box have through holes that match the outer arc wall of the tube.

[0012] Furthermore, a valve cover is fixedly installed on the top of the valve body, a rotating ring is provided on the top of the valve cover, a threaded rod is fixedly installed at the bottom end of the rotating ring, the threaded rod is threadedly connected to the valve cover and passes through the valve body, and an adjusting block is fixedly installed at the bottom end of the threaded rod, the adjusting block is located inside the tube body and is fitted with a rubber sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses symmetrically arranged sealing boxes on both sides of the connection between the valve body and the pipe body to ensure the sealing surface fit through evenly distributed clamping force, avoiding leakage caused by unilateral stress. The silicone sealing block inside the sealing box directly fits the outer wall of the valve body and the pipe body. The elastic deformation of the silicone compensates for minor surface unevenness and enhances the sealing performance. The sealing mechanism adopts a modular design. If the sealing block ages or is damaged, the sealing box can be disassembled separately without disassembling the entire valve body, which is convenient for maintenance and replacement.

[0015] 2. This utility model drives the active bevel gear to rotate by rotating the handle. The driven bevel gears, which mesh symmetrically, drive the two threaded columns to rotate synchronously in opposite directions, achieving precise transmission control. The rotation of the threaded columns pushes the threaded block to move linearly along the slide groove. The semi-arc clamping plate fixed on the threaded block moves closer to or away from the fixed column. When the clamping plate presses against the fixed column, the self-locking characteristics of the threaded column and the threaded block can resist loosening caused by vibration. The rotating ring drives the threaded rod to rise and fall vertically along the threaded hole of the valve cover by rotating, which drives the adjusting block at the bottom to move up and down in the pipe body. The displacement of the adjusting block changes the cross-sectional area of ​​the flow channel in the pipe body, realizing linear flow regulation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main body of a flow regulating valve for geological storage wells;

[0017] Figure 2 This is a schematic diagram of the regulating block in a flow regulating valve for a geological sealing well.

[0018] Figure 3 This is a schematic diagram of the structure inside the mounting box of a flow control valve for a geological storage well.

[0019] Figure 4 This is a schematic diagram of the structure inside the sealing box of a flow regulating valve for geological storage wells.

[0020] In the picture:

[0021] 1. Valve body; 2. Pipe body; 3. Valve cover; 4. Sealing box; 5. Rotating ring; 6. Threaded rod; 7. Adjusting block; 8. Mounting box; 9. Fixing block; 10. Fixing column; 11. Threaded column; 12. Driven bevel gear; 13. Driving bevel gear; 14. Rotating handle; 15. Threaded block; 16. Clamping plate; 17. Mounting groove; 18. Sealing block; 19. Rotating column; 20. Slide groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides a technical solution:

[0024] See Figure 1 and Figure 4As shown, a flow regulating valve for a geological storage well includes a valve body 1 and a pipe body 2. The valve body 1 is located above the pipe body 2 and passes through and communicates with the pipe body 2. The valve body 1 and the pipe body 2 are provided with a sealing mechanism. The sealing mechanism includes symmetrically fitted sealing boxes 4 on both sides of the joint between the valve body 1 and the pipe body 2. The front and back of the two sealing boxes 4 are each equipped with an installation box 8 and a fixing block 9. The fixing block 9 has a fixing post 10 fixedly installed at both ends on the side closest to the installation box 8. The other end of the fixing post 10 passes through into the installation box 8. A sealing block 18 is installed on the inner side wall of the sealing box 4. The sealing block 18 fits against the outer side wall of the valve body 1 and the pipe body 2. The sealing block 18 is made of silicone. Both the sealing block 18 and the sealing box 4 have through holes that match the outer arc wall of the pipe body 2.

[0025] In the specific implementation process, the sealing boxes 4 are symmetrically arranged on both sides of the connection between the valve body 1 and the pipe body 2. The uniformly distributed clamping force ensures the fit of the sealing surface and avoids leakage caused by unilateral stress. The silicone sealing block 18 inside the sealing box 4 directly fits the outer wall of the valve body 1 and the pipe body 2. The elastic deformation of the silicone compensates for minor unevenness on the surface and enhances the sealing performance. The fixing post 10 on the fixing block 9 passes through the mounting box 8 to form a rigid connection frame. This can not only ensure the positioning accuracy of the sealing box 4, but also control the clamping force of the sealing block 18 by adjusting the tightness of the fixing post 10, so as to adapt to different working conditions. The sealing mechanism adopts a modular design. If the sealing block 18 ages or is damaged, the sealing box 4 can be disassembled separately without disassembling the entire valve body 1.

[0026] See Figure 3 As shown, the mounting box 8 is equipped with a locking mechanism, which includes threaded pins 11 rotatably connected to the upper and lower surfaces of the mounting box 8, a rotating pin 19 rotatably connected to the middle section of the inner wall of the mounting box 8, a fixed block 9 fixedly mounting a driving bevel gear 13, driven bevel gears 12 meshing above and below the driving bevel gear 13, the two driven bevel gears 12 being fixedly connected to the two threaded pins 11 at their respective close ends, threaded blocks 15 threadedly connected to the two threaded pins 11, clamping plates 16 fixedly mounted on the threaded blocks 15, and two clamping plates... 16 abuts against two fixed posts 10 respectively. One end of the fixed post 10 located inside the mounting box 8 has a mounting groove 17. The mounting groove 17 is movably connected to the threaded post 11. The mounting box 8 has a sliding groove 20 on the side near the fixed block 9. The threaded block 15 is fixedly installed with a slider. The slider is slidably connected to the sliding groove 20. The longitudinal section of the clamping piece 16 is semi-arc and fits against the outer arc wall of the mounting groove 17. The outer surface of the mounting box 8 is rotatably connected to a rotating handle 14. The rotating handle 14 passes through the mounting box 8 and is fixedly connected to the driving bevel gear 13.

[0027] In the specific implementation process, the rotating handle 14 drives the driving bevel gear 13 to rotate, which in turn drives the two threaded columns 11 to rotate synchronously in opposite directions through the symmetrically meshing driven bevel gear 12. The rotation of the threaded columns 11 pushes the threaded block 15 to move linearly along the slide groove 20. The semi-arc clamping piece 16 fixed on the threaded block 15 moves closer to or further away from the fixed column 10. The arc-shaped cross-section of the clamping piece 16 fits against the outer wall of the mounting groove 17 of the fixed column 10, increasing the contact area and preventing local stress concentration. The slide groove 20 restricts the threaded block 15 to move only axially. The clamping plate 16 ensures clamping accuracy. When the clamping plate 16 presses against the fixed post 10, the self-locking characteristics of the threaded post 11 and the threaded block 15 can resist loosening caused by vibration. The movable connection between the mounting groove 17 and the threaded post 11 allows for quick installation of the fixed post 10. When installing the sealing box 4, simply insert the fixed post 10 into the mounting box 8. At this time, the threaded post 11 is located in the mounting groove 17. The clamping plate 16 has a circular hole that allows it to move up and down. By rotating the rotating handle 14, the clamping plate 16 can be used to lock the fixed post 10.

[0028] See Figure 2 As shown, a valve cover 3 is fixedly installed on the top of the valve body 1. A rotating ring 5 is located above the valve cover 3. A threaded rod 6 is fixedly installed at the bottom of the rotating ring 5. The threaded rod 6 is threadedly connected to the valve cover 3 and passes through the valve body 1. An adjusting block 7 is fixedly installed at the bottom of the threaded rod 6. The adjusting block 7 is located inside the pipe body 2 and is fitted with a rubber sleeve. In the specific implementation process, the rotating ring 5 drives the threaded rod 6 to move vertically up and down along the threaded hole of the valve cover 3 by rotation, which drives the adjusting block 7 at the bottom to move up and down inside the pipe body 2. The displacement of the adjusting block 7 changes the cross-sectional area of ​​the flow channel inside the pipe body 2, realizing linear flow regulation. The rubber sleeve can enhance the sealing between the adjusting block 7 and the inner wall of the pipe body 2 and reduce internal leakage. The valve cover 3 and the valve body 1 are sealed by a flange or threaded hard seal to ensure static sealing under high pressure. The rubber sleeve fits tightly against the inner wall of the pipe body 2 to adapt to friction and media corrosion during the regulation process.

[0029] Working principle:

[0030] Step 1: A sealing box 4 is symmetrically fitted on both sides of the junction of valve body 1 and pipe body 2. Evenly distributed clamping force ensures the sealing surface fit, preventing leakage caused by unilateral stress. A sealing block 18 is installed on the inner wall of the sealing box 4, fitting snugly against the outer walls of valve body 1 and pipe body 2. Made of silicone, the silicone's elastic deformation compensates for minor surface unevenness, enhancing sealing. Both the sealing block 18 and the sealing box 4 have through holes matching the outer arc wall of pipe body 2. Mounting boxes 8 and fixing blocks 9 are installed on the front and back of both sealing boxes 4. Fixing posts 10 are fixedly installed at the upper and lower ends of the fixing block 9 near the mounting box 8. The other end of the fixing post 10 penetrates into the mounting box 8, forming a rigid connection frame. This ensures the positioning accuracy of the sealing box 4 and allows adjustment of the clamping force of the sealing block 18 by adjusting the tightness of the fixing post 10, adapting to different working conditions. The sealing mechanism adopts a modular design; if the sealing block 18 ages or is damaged, the sealing box 4 can be disassembled separately without disassembling the entire valve body 1.

[0031] Step Two: The mounting box 8 is equipped with a locking mechanism. Threaded posts 11 are rotatably connected to the upper and lower surfaces of the inner surface, and a rotating post 19 is rotatably connected to the middle section of the inner wall. A driving bevel gear 13 is fixedly mounted on the fixing block 9. Driven bevel gears 12 mesh with the upper and lower parts of the driving bevel gear 13. The two driven bevel gears 12 are fixedly connected to the two threaded posts 11 at their respective close ends. Threaded blocks 15 are threadedly connected to the two threaded posts 11. Clamping pieces 16 are fixedly mounted on the threaded blocks 15, and the two clamping pieces 16 abut against the two fixing posts 10. A mounting groove 17 is formed at one end of the fixing post 10 inside the mounting box 8, and the mounting groove 17 is movably connected to the threaded post 11. A sliding groove 20 is formed on the side of the mounting box 8 near the fixing block 9. A slider is fixedly mounted on the threaded block 15, and the slider is slidably connected to the sliding groove 20, restricting the threaded block 15 to only axial movement, ensuring clamping accuracy. The longitudinal section of the clamping piece 16 is semi-arc and fits against the outer arc wall of the mounting groove 17, increasing the contact area and preventing localized... Stress concentration occurs when a rotating handle 14 is rotatably connected to the outer surface of the mounting box 8. The rotating handle 14 passes through the mounting box 8 and is fixedly connected to the driving bevel gear 13. The rotating handle 14 drives the driving bevel gear 13 to rotate, which in turn drives the two threaded columns 11 to rotate synchronously in opposite directions through the driven bevel gear 12 with symmetrical meshing. The rotation of the threaded columns 11 pushes the threaded block 15 to move linearly along the slide groove 20. The semi-arc clamping piece 16 fixed on the threaded block 15 moves closer to or further away from the fixed column 10. When the clamping piece 16 presses against the fixed column 10, the self-locking characteristic of the threaded column 11 and the threaded block 15 can resist loosening caused by vibration. The movable connection between the mounting groove 17 and the threaded column 11 allows for the quick installation of the fixed column 10. When installing the sealing box 4, it is only necessary to insert the fixed column 10 into the mounting box 8. At this time, the threaded column 11 is located in the mounting groove 17. The clamping piece 16 has a circular hole that allows it to move up and down. By rotating the rotating handle 14, the clamping piece 16 can be used to lock the fixed column 10.

[0032] Step 3: The rotating ring 5 drives the threaded rod 6 to move vertically up and down along the threaded hole of the valve cover 3, which in turn drives the adjusting block 7 at the bottom to move up and down inside the pipe body 2. The displacement of the adjusting block 7 changes the cross-sectional area of ​​the flow channel inside the pipe body 2, thereby achieving linear flow regulation. The rubber sleeve can enhance the sealing between the adjusting block 7 and the inner wall of the pipe body 2 and reduce internal leakage. The valve cover 3 and the valve body 1 are sealed by a flange or threaded hard seal to ensure static sealing under high pressure. The rubber sleeve fits tightly against the inner wall of the pipe body 2 to adapt to friction and media corrosion during the regulation process.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flow regulating valve for geological storage wells, comprising a valve body (1) and a pipe body (2), characterized in that, The valve body (1) is located above the pipe body (2) and passes through the pipe body (2) and communicates with the pipe body (2). The valve body (1) and the pipe body (2) are provided with a sealing mechanism. The sealing mechanism includes symmetrically fitted sealing boxes (4) on both sides of the junction of the valve body (1) and the pipe body (2). The front and back of the two sealing boxes (4) are equipped with mounting boxes (8) and fixing blocks (9). The fixing blocks (9) have fixing columns (10) fixedly installed at the upper and lower ends of the side close to the mounting box (8). The other end of the fixing column (10) passes through the mounting box (8). The inner side wall of the sealing box (4) is equipped with a sealing block (18). The sealing block (18) is in contact with the outer side wall of the valve body (1) and the pipe body (2).

2. The flow regulating valve for geological storage wells as described in claim 1, characterized in that: The mounting box (8) is provided with a locking mechanism, which includes a threaded column (11) rotatably connected to the upper and lower surfaces of the mounting box (8), a rotating column (19) rotatably connected to the middle section of the inner wall of the mounting box (8), a driving bevel gear (13) fixedly installed on the fixing block (9), a driven bevel gear (12) meshing with the upper and lower sides of the driving bevel gear (13), two driven bevel gears (12) fixedly connected to the two threaded columns (11) respectively, a threaded block (15) threadedly connected to the two threaded columns (11), a clamping piece (16) fixedly installed on the threaded block (15), and two clamping pieces (16) abutting against the two fixing columns (10) respectively.

3. The flow regulating valve for geological storage wells as described in claim 2, characterized in that: The fixed post (10) has an installation groove (17) at one end inside the mounting box (8), and the installation groove (17) is movably connected to the threaded post (11).

4. The flow regulating valve for geological storage wells as described in claim 3, characterized in that: The mounting box (8) has a groove (20) on the side near the fixing block (9), and the threaded block (15) is fixedly installed with a slider, which is slidably connected to the groove (20).

5. A flow regulating valve for geological storage wells as described in claim 4, characterized in that: The longitudinal section of the clamping piece (16) is semi-arc and fits against the outer arc wall of the mounting groove (17).

6. The flow regulating valve for geological storage wells as described in claim 5, characterized in that: The outer surface of the mounting box (8) is rotatably connected to a rotating handle (14), which passes through the mounting box (8) and is fixedly connected to the drive bevel gear (13).

7. A flow regulating valve for geological storage wells as described in claim 6, characterized in that: The sealing block (18) is made of silicone. Both the sealing block (18) and the sealing box (4) have through holes that match the outer arc wall of the tube body (2).

8. A flow regulating valve for geological storage wells as described in claim 7, characterized in that: A valve cover (3) is fixedly installed on the top of the valve body (1). A rotating ring (5) is provided on the top of the valve cover (3). A threaded rod (6) is fixedly installed at the bottom end of the rotating ring (5). The threaded rod (6) is threadedly connected to the valve cover (3) and passes through the valve body (1). An adjusting block (7) is fixedly installed at the bottom end of the threaded rod (6). The adjusting block (7) is located inside the pipe body (2) and is fitted with a rubber sleeve.

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