Sealing packing box capable of automatically adjusting deviation

Abstract

The utility model provides an automatic deviation-adjusting sealing packing box. The automatic deviation-adjusting sealing packing box comprises a high-pressure ball valve, a plurality of groups of packing structures, an eccentric structure and a gas cap structure, the high-pressure ball valve is sleeved on the outer surface of the sucker rod; the multiple sets of packing structures are tightly arranged on the outer surface of the sucker rod in a sleeving mode and installed on the top of the high-pressure ball valve. The eccentric structure sleeves the outer surface of the sucker rod, the first end of the eccentric structure is tightly connected with a field pipeline, and the second end of the eccentric structure is tightly connected to the bottom of the high-pressure ball valve; and the gas cap structure is tightly mounted at the bottom of the packing structure. When the sucker rod obliquely moves, the eccentric structure can automatically adjust the position of the sucker rod; in addition, when the packing structure needs to be maintained or replaced, the packing structure is detached, the gas cap structure can eject the packing in the packing structure out by injecting high-pressure gas flow, the detaching efficiency is improved, the problems that the packing structure is damaged and a sucker rod is scratched cannot be caused, it is ensured that the sealing face is always kept sealed, and the service life of the sucker rod is prolonged. Therefore, petroleum is effectively prevented from leaking outwards from the on-site pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum extraction, in particular to an automatic deviation-adjusting sealing packing box. Background Art

[0002] In oil production operations, a packing seal device is installed at the wellhead, and the sealing box device plays a vital role in oil production operations;

[0003] Under normal circumstances, the packing box needs to be inspected and repaired according to the prescribed period. However, the packing fits tightly with the polished rod and the box body. When disassembling, it needs to be hooked and pulled with a sharp object. This method is inefficient and can easily damage the packing structure and scratch the sucker rod, creating a production safety hazard. When the sucker rod moves up and down, axial deviation will occur. The traditional packing box cannot automatically adjust the tilt and deviation, resulting in irregular friction between the polished rod and the seal, and leakage on the sealing surface. In addition, the currently used packing is generally made of nitrile rubber. During use, the material is prone to aging, resulting in damage to the polished rod sealing surface, and leakage, bubbling, dripping, and leakage at the wellhead, which pollutes the environment and wastes oilfield resources.

[0004] Therefore, there is an urgent need for a device to solve the above problems in the prior art. Utility Model Content

[0005] The main purpose of the utility model is to provide an automatic deflection-adjusting sealing packing box, so as to at least solve the problem in the prior art that the packing structure is easily damaged and the pumping rod is easily scratched when the packing is disassembled.

[0006] In order to achieve the above-mentioned objectives, the utility model provides an automatically eccentric sealing packing box, comprising a high-pressure ball valve, multiple groups of packing structures, an eccentric structure and an air cap structure; the high-pressure ball valve is sleeved on the outer surface of the sucker rod; the multiple groups of packing structures are tightly sleeved on the outer surface of the sucker rod and installed on the top of the high-pressure ball valve, and the packing structure is used to prevent oil leakage; the eccentric structure is sleeved on the outer surface of the sucker rod, the first end of the eccentric structure is tightly connected to the on-site pipeline, and the second end of the eccentric structure is tightly connected to the bottom of the high-pressure ball valve; the eccentric structure is used to prevent oil from leaking out from the on-site pipeline when the sucker rod drives the high-pressure ball valve and the packing structure to move tiltedly; the air cap structure is tightly installed at the bottom of the packing structure, and the air cap structure is used to push out the packing in the packing structure through airflow when the packing structure is disassembled.

[0007] Optionally, the plurality of packing structures further include:

[0008] a first packing structure, wherein a bottom end of the first packing structure is tightly connected to the high-pressure ball valve;

[0009] A second packing structure is provided above the first packing structure.

[0010] Optionally, the first packing structure includes:

[0011] a first joint, wherein a first end of the first joint is tightly mounted on the top of the high-pressure ball valve;

[0012] a first spiral packing, the first spiral packing being placed inside the second end of the first joint, wherein when the first spiral packing is compressed, an inner surface of the first spiral packing is in close contact with an outer surface of the sucker rod;

[0013] a first compression ring, the first compression ring being mounted on the top of the first spiral packing, wherein the bottom surface of the first compression ring contacts the top surface of the first spiral packing;

[0014] a first pressing groove, wherein the inner surface of the first end of the first pressing groove is connected to the outer surface of the first joint via a thread; the inner end surface of the first pressing groove is in contact with the top surface of the first clamping ring;

[0015] When the first pressing groove is locked with the first joint under the action of external force, the inner end surface of the first pressing groove moves downward, driving the first clamping ring to gradually press the first spiral packing onto the second end of the first joint.

[0016] Optionally, the second packing structure includes:

[0017] a second joint, the second joint being fixed to the top of the first joint, the inner surface of the first end of the second joint being in contact with the outer surface of the sucker rod;

[0018] a second spiral packing, the second spiral packing being placed inside the second end of the second joint, wherein when the second spiral packing is compressed, an inner surface of the second spiral packing is in close contact with an outer surface of the sucker rod;

[0019] a second compression ring, the second compression ring being mounted on the top of the second spiral packing, the bottom surface of the second compression ring being aligned with the top surface of the second spiral packing;

[0020] a second pressing groove, wherein the inner surface of the first end of the second pressing groove is connected to the outer surface of the second joint via a thread; and the inner end surface of the second pressing groove is in contact with the top surface of the second clamping ring;

[0021] When the second pressing groove is locked with the second joint under the action of external force, the inner end surface of the second pressing groove moves downward, driving the second clamping ring to gradually press the second spiral packing onto the second end of the second joint.

[0022] Optionally, the inner surface of the first joint is provided with a first boss extending toward the central axis along the circumferential direction, and the first packing structure further comprises:

[0023] a first compression spring, the first compression spring being disposed between the first boss and the first spiral packing;

[0024] When the first spiral packing is gradually pressed against the second end of the first joint, the first compression spring is compressed; when the first compression groove is loosened from the first joint under the action of external force, the first compression spring is released, and the first compression spring lifts the first spiral packing.

[0025] Optionally, the second pressing groove is provided with a first threaded hole perpendicular to the central axis of the second pressing groove, and the automatic deflection-adjusting sealing packing box further comprises:

[0026] a handle, wherein a first end of the handle is engaged with the first threaded hole;

[0027] When the second end of the handle is subjected to external force, the handle drives the second pressing groove to rotate to tighten or loosen the second pressing ring.

[0028] Optionally, the first pressing groove and the second pressing groove are cast as one piece.

[0029] Optionally, the eccentric structure includes:

[0030] A spherical connection structure, wherein the inner surface of the first end of the spherical connection structure is tightly connected to the on-site pipeline through a thread; the inner surface of the second end of the spherical connection structure is a first concave spherical surface;

[0031] A spherical eccentric seat, wherein the outer surface of the first end of the spherical eccentric seat is a convex spherical surface, and the convex spherical surface is tightly matched with the first concave spherical surface; the inner surface of the second end of the spherical eccentric seat is tightly connected to the bottom of the high-pressure ball valve;

[0032] Among them, the outer surface of the first end of the spherical eccentric seat is provided with a clamping platform, and the top of the inner surface of the second end of the spherical connection structure is provided with a clamping ring; the clamping ring acts on the clamping platform to press the spherical eccentric seat into the spherical connection structure; when the sucker rod moves, it drives the spherical eccentric seat to rotate relative to the spherical connection structure; during the rotation of the spherical eccentric seat, the convex spherical surface is always tightly matched with the inner surface of the spherical connection structure.

[0033] Optionally, a gap is reserved between the first boss and the sucker rod, and the gas cap structure includes:

[0034] a one-way valve installed at the first end of the first joint and communicating with the interior space of the first joint; the one-way valve is used to allow gas to be introduced from the outside into the interior space of the first joint when the first spiral packing is removed, so that the gas pushes the first spiral packing out;

[0035] an exhaust ball valve, mounted on the first end of the first joint and in communication with the interior space of the first joint; the exhaust ball valve is used to exhaust the gas in the interior space of the first joint when the first spiral packing is installed;

[0036] The sleeve gas connection short circuit has a first end connected to the one-way valve and a second end connected to the gas supply device; the sleeve gas connection short circuit is used to pass the gas in the gas supply device into the internal space of the first joint through the one-way valve.

[0037] Optionally, the first spiral packing and the second spiral packing are made of carbon fiber nitrile rubber composite materials.

[0038] An automatic deflection-adjusting sealing packing box using the technical solution of the utility model comprises a high-pressure ball valve, multiple groups of packing structures, an eccentric structure and an air cap structure; the high-pressure ball valve is sleeved on the outer surface of the sucker rod; the multiple groups of packing structures are tightly sleeved on the outer surface of the sucker rod and installed on the top of the high-pressure ball valve, and the packing structure is used to prevent oil leakage; the eccentric structure is sleeved on the outer surface of the sucker rod, the first end of the eccentric structure is tightly connected to the on-site pipeline, and the second end of the eccentric structure is tightly connected to the bottom of the high-pressure ball valve; the eccentric structure is used to prevent oil from leaking out of the on-site pipeline when the sucker rod drives the high-pressure ball valve and the packing structure to move obliquely; the air cap structure is tightly installed at the bottom of the packing structure, and the air cap structure is used to push the packing in the packing structure out by airflow when the packing structure is disassembled. Therefore, when the sucker rod tilts and moves, the eccentric structure can automatically adjust its position; in addition, when the packing structure needs to be disassembled for maintenance or replacement, the air cap structure can eject the packing in the packing structure by injecting high-pressure airflow, thereby improving the disassembly efficiency and causing no damage to the packing structure or scratches on the sucker rod, ensuring that the sealing surface always remains sealed, thereby effectively preventing oil from leaking out of the on-site pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 This is a schematic diagram of an automatic deviation-adjusting sealing packing box according to an embodiment of the present utility model;

[0041] Figure 2This is a schematic diagram of an automatic deflection-adjusting sealing packing box tilting leftward following the sucker rod according to an embodiment of the present utility model;

[0042] Figure 3 This is a schematic diagram of an automatic deflection-adjusting sealing packing box tilting rightward following the sucker rod according to an embodiment of the present utility model;

[0043] Figure 4 This is a schematic diagram of an optional air cap structure lifting a first spiral packing according to an embodiment of the present utility model.

[0044] The above drawings include the following reference numerals:

[0045] 1. High-pressure ball valve; 2. Packing structure; 21. First packing structure; 211. First joint; 212. First spiral packing; 213. First clamping ring; 214. First pressure groove; 215. First compression spring; 216. Straightening bushing; 22. Second packing structure; 221. Second joint; 222. Second spiral packing; 223. Second clamping ring; 224. Second pressure groove; 225. Second compression spring; 3. Eccentric structure; 31. Spherical connection structure; 311. Spherical joint; 312. Adjusting pressure cap; 32. Spherical eccentric seat; 4. Gas cap structure; 41. One-way valve; 42. Exhaust ball valve; 43. Short-circuit of sleeve gas connection; 50. Handle. DETAILED DESCRIPTION

[0046] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0047] like Figure 1 As shown, an automatic deflection-adjusting sealing packing box includes a high-pressure ball valve 1, multiple groups of packing structures 2, an eccentric structure 3 and an air cap structure 4; the high-pressure ball valve 1 is sleeved on the outer surface of the sucker rod; the multiple groups of packing structures 2 are tightly sleeved on the outer surface of the sucker rod and installed on the top of the high-pressure ball valve 1, and the packing structure 2 is used to prevent oil leakage; the eccentric structure 3 is sleeved on the outer surface of the sucker rod, the first end of the eccentric structure 3 is tightly connected to the on-site pipeline, and the second end of the eccentric structure 3 is tightly connected to the bottom of the high-pressure ball valve 1; the eccentric structure 3 is used to prevent oil from leaking out from the on-site pipeline when the sucker rod drives the high-pressure ball valve 1 and the packing structure 2 to move tiltedly; the air cap structure 4 is tightly installed at the bottom of the packing structure 2, and the air cap structure 4 is used to push out the packing in the packing structure 2 through airflow when the packing structure 2 is disassembled.

[0048] Specifically, the high-pressure ball valve 1 fits snugly around the outer surface of the sucker rod, maintaining a stable seal even under high pressure. In emergencies, such as a rod break, it quickly shuts off oil flow and prevents spills. Multiple packing structures 2, the core components of the sealing system, fit tightly around the outer surface of the sucker rod and are mounted on top of the high-pressure ball valve 1. The effective sealing performance of these multiple packing structures further reduces oil leakage. Each packing structure 2 fits snugly around the sucker rod surface. Even if one packing structure 2 becomes worn or degraded, the remaining packing structures 2 continue to function, ensuring a comprehensive seal. The eccentric structure 3 fits snugly around the outer surface of the sucker rod. One end of the eccentric structure 3 is tightly connected to the on-site pipeline, while the other end is securely attached to the bottom of the high-pressure ball valve 1. As the sucker rod tilts and moves, the eccentric structure automatically adjusts its position, ensuring a consistent seal at all times, effectively preventing oil leakage from the on-site pipeline. The air cap structure 4 is tightly mounted on the bottom of the packing structure 2. When the packing structure 2 needs to be disassembled for maintenance or replacement, the air cap structure 4 can easily push out the packing in the packing structure by injecting high-pressure airflow, which not only improves the disassembly efficiency, but also avoids the problems of packing structure damage and sucker rod scratches that may be caused by traditional disassembly methods, providing a strong guarantee for the safety and smooth progress of oil extraction operations.

[0049] In one possible implementation, the multiple packing structures 2 further include:

[0050] A first packing structure 21, the bottom end of which is tightly connected to the high-pressure ball valve 1;

[0051] The second packing structure 22 is arranged above the first packing structure 21 .

[0052] Specifically, the first packing structure 21 is tightly connected to the top of the high-pressure ball valve 1, forming a primary sealing barrier. The second packing structure 22, positioned above the first packing structure 21, serves as a secondary sealing barrier, further enhancing sealing reliability. Spiral packing is elastic and compressible, primarily relying on its elasticity and compressibility to achieve sealing. When installed and compressed within the sealing area, the spiral packing deforms, filling the tiny gap between the pump rod and the pump, thereby preventing oil leakage.

[0053] In one possible implementation, the first packing structure 21 includes:

[0054] A first connector 211, a first end of which is tightly mounted on the top of the high-pressure ball valve 1;

[0055] A first spiral packing 212 is placed inside the second end of the first joint 211. When the first spiral packing 212 is compressed, the inner surface of the first spiral packing 212 is tightly fitted to the outer surface of the sucker rod;

[0056] A first compression ring 213 is installed on the top of the first spiral packing 212, and the bottom surface of the first compression ring 213 contacts the top surface of the first spiral packing 212;

[0057] A first pressing groove 214, wherein the inner surface of the first end of the first pressing groove 214 is connected to the outer surface of the first joint 211 via a thread; the inner end surface of the first pressing groove 214 is in contact with the top surface of the first clamping ring 213;

[0058] When the first pressing groove 214 is locked with the first joint 211 under the action of external force, the inner end surface of the first pressing groove 214 moves downward, driving the first clamping ring 213 to gradually press the first spiral packing 212 against the second end of the first joint 211.

[0059] Specifically, the first end of the first joint 211 is tightly connected to the high-pressure ball valve 1. There is a space between the first end of the first joint 211 and the high-pressure ball valve 1 and the sucker rod. The first spiral packing 212 is tightly combined with the sucker rod, and the space is in a sealed state. The bottom surface of the first clamping ring 213 contacts the top surface of the first spiral packing 212. The inner end surface of the first pressure groove 214 fits the top surface of the first clamping ring 213. The internal space at the second end of the first joint 211 is larger at the top and smaller at the bottom. When the first joint 211 rotates and is thread-locked with the first joint 211 under the action of external force, the inner end surface of the first pressure groove 214 moves downward, directly driving the first clamping ring 213 to move downward, thereby compressing the first spiral packing 212 through the downward pressure of the first clamping ring 213 to fit tightly with the sucker rod, thereby achieving a sealing effect.

[0060] The inner surface of the second end of the first compression groove 214 is in contact with the sucker rod, so that the inner end surface of the first compression groove 214 presses the first clamping ring 213 downward along the sucker rod. A centering ring 216 is also mounted on the inner surface of the first clamping ring 213. The inner surface of the centering ring 216 mates with the outer surface of the sucker rod, and the top surface of the centering ring 216 is flush with the top surface of the first clamping ring 213. When the first compression groove 214 presses the first clamping ring 213 downward, the centering ring 216 centeringly supports the sucker rod, preventing the sucker rod from tilting during the downward pressure process. A sealing ring is provided between the first compression groove 214 and the outer surface of the first joint 211, and a sealing ring is provided between the inner end surface of the first joint 211 and the top surface of the first clamping ring 213.

[0061] In one possible embodiment, the second packing structure 22 includes:

[0062] A second joint 221, the second joint 221 is fixed on the top of the first joint 211, and the inner surface of the first end of the second joint 221 is in contact with the outer surface of the sucker rod;

[0063] The second spiral packing 222 is placed inside the second end of the second joint 221. When the second spiral packing 222 is compressed, the inner surface of the second spiral packing 222 is tightly fitted to the outer surface of the sucker rod;

[0064] A second compression ring 223 is installed on the top of the second spiral packing 222, and the bottom surface of the second compression ring 223 contacts the top surface of the second spiral packing 222;

[0065] A second pressing groove 224, wherein the inner surface of the first end of the second pressing groove 224 is connected to the outer surface of the second joint 221 via a thread; the inner end surface of the second pressing groove 224 is in contact with the top surface of the second clamping ring 223;

[0066] When the second pressing groove 224 is locked with the second joint 221 under the action of external force, the inner end surface of the second pressing groove 224 moves downward, driving the second clamping ring 223 to gradually press the second spiral packing 222 against the second end of the second joint 221 .

[0067] Specifically, the inner surface dimensions of the first end of the second joint 221 are identical to the inner surface dimensions of the second end of the first compression groove 214. The bottom surface of the second compression ring 223 contacts the top surface of the second spiral packing 222. The inner end surface of the second compression groove 224 fits in contact with the top surface of the second compression ring 223. The internal space at the second end of the second joint 221 is larger at the top and smaller at the bottom. When the second joint 221 rotates and is threadedly locked to the second joint 221 under the action of an external force, the inner end surface of the second compression groove 224 moves downward, directly driving the second compression ring 223 downward. The downward pressure of the second compression ring 223 compresses the second spiral packing 222, tightly fitting it against the sucker rod to achieve a sealing effect. A sealing ring is provided between the outer surface of the second compression groove 224 and the second joint 221, and a sealing ring is provided between the inner end surface of the second compression groove 224 and the top surface of the second compression ring 223.

[0068] In a possible embodiment, the inner surface of the first joint 211 is provided with a first boss extending toward the central axis along the circumferential direction, and the first packing structure 21 further includes:

[0069] A first compression spring 215 , which is disposed between the first boss and the first spiral packing 212 ;

[0070] When the first spiral packing 212 is gradually pressed against the second end of the first joint 211, the first compression spring 215 is compressed; when the first compression groove 214 is loosened from the first joint 211 under the action of external force, the first compression spring 215 is released, and the first compression spring 215 pushes up the first spiral packing 212.

[0071] Specifically, when the first compression ring 213 is pressed downward, the first spiral packing 212 is pressed downward, compressing the first compression spring 215. The first compression spring 215 exerts an upward reaction force on the first spiral packing 212. After being subjected to the combined compression force of the first compression ring 213 and the first compression spring 215, the first spiral packing 212 is tightly attached to the surface of the sucker rod, forming an effective sealing layer. In addition, when it is necessary to remove the first spiral packing 212, the force applied by the first compression ring 213 to the first spiral packing 212 and the first compression spring 215 is released when the first compression groove 214 is released. The first compression spring 215 lifts the first spiral packing 212, making it easier to remove.

[0072] Similarly, a second compression spring 225 is disposed between the inner end surface of the second joint 221 and the second spiral packing 222. The second compression ring 223 and the second compression spring 225 jointly compress the second spiral packing 222, tightly fitting it against the surface of the sucker rod. The second compression spring 225 also facilitates removal of the second spiral packing 222.

[0073] In a possible implementation, the second pressing groove 224 is provided with a first threaded hole perpendicular to the central axis of the second pressing groove 224 , and the automatic deflection-adjusting sealing packing box further includes:

[0074] The handle 50, the first end of the handle 50 is engaged with the first threaded hole;

[0075] When the second end of the handle 50 is subjected to external force, the handle (50) drives the second pressing groove 224 to rotate to tighten or loosen the second pressing ring 223.

[0076] Specifically, the handle 50 is fixedly connected to the second pressure groove 224 through the first threaded hole, and the operator can more easily rotate the second pressure groove 224 through the handle 50 without using other tools or applying excessive force. Using the handle 50 for rotation operation can achieve the tightening or loosening of the second clamping ring 223 more quickly, thereby improving the installation, disassembly and maintenance efficiency of the entire sealing device.

[0077] In addition, the first pressing groove 214 is provided with a second threaded hole perpendicular to the central axis of the first pressing groove 214. The second threaded hole is the same as the first threaded hole. In this way, the handle 50 can also be connected to the first pressing groove 214 to achieve the tightening or loosening of the first pressing groove 214, thereby enhancing the versatility of the components and further reducing costs.

[0078] In a possible implementation, the first indentation groove 214 and the second indentation groove 224 are integrally cast.

[0079] Specifically, the integral casting means that there is no connection gap or weak point between the first pressing groove 214 and the second pressing groove 224, thereby improving the strength and stability of the entire structure and reducing the risk of leakage or damage caused by problems in the connection structure.

[0080] In a possible implementation, the eccentric structure 3 includes:

[0081] The spherical connection structure 31 has an inner surface at a first end thereof tightly connected to the on-site pipeline via a thread; the inner surface at a second end thereof is a first concave spherical surface;

[0082] The spherical eccentric seat 32 has a convex spherical surface at its first end, and the convex spherical surface is tightly fitted with the first concave spherical surface; the inner surface at its second end is tightly connected to the bottom of the high-pressure ball valve 1;

[0083] Among them, a clamping platform is provided on the outer surface of the first end of the spherical eccentric seat 32, and a clamping ring is provided on the top of the inner surface of the second end of the spherical connecting structure 31; the clamping ring acts on the clamping platform to press the spherical eccentric seat 32 tightly into the spherical connecting structure 31; when the sucker rod moves, it drives the spherical eccentric seat 32 to rotate relative to the spherical connecting structure 31; during the rotation of the spherical eccentric seat 32, the convex spherical surface is always tightly matched with the inner surface of the spherical connecting structure 31.

[0084] Specifically, the eccentric structure 3 allows the spherical eccentric seat 32 to rotate to a certain extent within the spherical connection structure 31, thereby adapting to the angular changes and displacement requirements that may occur during the movement of the sucker rod, ensuring the stable operation of the oil extraction or transportation system and reducing the risk of failure caused by stiff connection components. The provision of a sealing ring ensures a leak-proof seal between the spherical connection structure 31 and the spherical eccentric seat 32.

[0085] The spherical connection structure 31 includes a spherical joint 311 and an adjusting pressure cap 312. The inner surface of the first end of the spherical joint 311 is tightly connected to the on-site pipeline via a thread. The inner surface of the second end of the spherical joint 311 is a first concave spherical surface, which is tightly fitted with the lower half of the convex spherical surface of the first end of the spherical eccentric seat 32. The inner surface of the first end of the adjusting pressure cap 312 is tightly connected to the outer surface of the first end of the spherical joint 311 via a thread. The inner surface of the second end of the adjusting pressure cap 312 is a second concave spherical surface, which is tightly fitted with the upper half of the convex spherical surface of the first end of the spherical eccentric seat 32. In addition, as Figure 2 and Figure 3 As shown, when the sucker rod moves up and down, and experiences left-right wobbling, the spherical joint 311 and the adjusting cap 312 rotate relative to the spherical eccentric seat 32. The multiple packing structures 2 are always synchronized with the center of the sucker rod, slowing wear of the sealing components. A sealing ring is positioned within the first concave spherical surface, sealingly engaging both the first concave spherical surface and the convex spherical surface. The sealing ring prevents oil from leaking outward from between the first concave and convex spherical surfaces.

[0086] In a possible embodiment, a gap is reserved between the first boss and the sucker rod, and the gas cap structure 4 includes:

[0087] A one-way valve 41 is installed at the first end of the first connector 211 and communicates with the interior space of the first connector 211. The one-way valve 41 is used to allow gas to flow from the outside into the interior space of the first connector 211 when the first spiral packing 212 is removed, so that the gas pushes the first spiral packing 212 out.

[0088] The exhaust ball valve 42 is installed at the first end of the first joint 211 and is in communication with the interior space of the first joint 211. The exhaust ball valve 42 is used to exhaust the gas in the interior space of the first joint 211 when the first spiral packing 212 is installed.

[0089] The casing gas connection short circuit 43 has a first end connected to the one-way valve 41 and a second end connected to the gas supply device; the casing gas connection short circuit 43 is used to pass the gas in the gas supply device into the internal space of the first joint 211 through the one-way valve 41.

[0090] Specifically, the one-way valve 41 is installed at the first end of the first joint 211 and communicates with the internal space of the first joint 211. The one-way valve 41 allows gas from outside to flow into the internal space of the first joint 211. That is, when gas pressure is applied to the one-way valve 41 from the outside, the valve will open to allow gas to enter, and when the gas in the internal space of the first joint 211 tries to flow out, the valve will close tightly to prevent gas leakage. Figure 4As shown, when removing the first spiral packing 212 , the operator only needs to introduce gas into the inner space of the first joint 211 through the one-way valve 41 , and the gas pressure will push out the first spiral packing 212 , without the need to use traditional tools for laborious removal.

[0091] The exhaust ball valve 42, mounted opposite the check valve 41, is also connected to the interior of the first joint 211. This allows the operator to conveniently control the exhaust of gas from the interior of the first joint 211. Before installing the new first spiral packing 212, the operator can open the exhaust ball valve 42 to completely exhaust the gas from the interior of the first joint 211, ensuring that no gas remains during installation. This allows the operator to compress the first spiral packing 212 while simultaneously venting air from the interior of the first joint 211, ensuring a tight installation.

[0092] The jacket gas connection short 43 safely and efficiently transfers gas from the gas supply device to the one-way valve 41 through a short, sturdy connecting pipe, and then into the internal space of the first connector 211. The jacket gas connection short 43 not only ensures a stable supply of gas, but also prevents leakage and loss of gas during the transmission process through its sturdy structure and tight connection.

[0093] In a possible implementation, the first spiral packing 212 and the second spiral packing 222 are made of a carbon fiber nitrile rubber composite material.

[0094] Specifically, the first spiral packing 212 and the second spiral packing 222 are made of a new type of carbon fiber nitrile rubber composite material, which ensures the sealing effect while greatly improving the wear resistance, temperature stability and chemical corrosion resistance of the seal.

[0095] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automatic deviation-adjusting sealing packing box, characterized in that: include: A high-pressure ball valve (1) is sleeved on the outer surface of the sucker rod; Multiple packing structures (2) are tightly fitted on the outer surface of the sucker rod and installed on the top of the high-pressure ball valve (1), and the packing structures (2) are used to prevent oil leakage; An eccentric structure (3) is sleeved on the outer surface of the sucker rod, wherein the first end of the eccentric structure (3) is tightly connected to the on-site pipeline, and the second end of the eccentric structure (3) is tightly connected to the bottom of the high-pressure ball valve (1); the eccentric structure (3) is used to prevent oil from leaking outward from the on-site pipeline when the sucker rod drives the high-pressure ball valve (1) and the packing structure (2) to tilt and move; An air cap structure (4) is tightly mounted on the bottom of the packing structure (2), and the air cap structure (4) is used to eject the packing in the packing structure (2) through air flow when the packing structure (2) is disassembled.

2. The automatic deviation-adjusting sealing packing box according to claim 1, characterized in that: The plurality of packing structures (2) further include: a first packing structure (21), wherein the bottom end of the first packing structure (21) is tightly connected to the high-pressure ball valve (1); A second packing structure (22), wherein the second packing structure (22) is arranged above the first packing structure (21).

3. The automatic deviation-adjusting sealing packing box according to claim 2, characterized in that: The first packing structure (21) comprises: A first connector (211), wherein a first end of the first connector (211) is tightly mounted on the top of the high-pressure ball valve (1); a first spiral packing (212), the first spiral packing (212) being placed inside the second end of the first joint (211), wherein when the first spiral packing (212) is compressed, the inner surface of the first spiral packing (212) is in close contact with the outer surface of the sucker rod; a first compression ring (213), the first compression ring (213) being installed on the top of the first spiral packing (212), the bottom surface of the first compression ring (213) being in contact with the top surface of the first spiral packing (212); a first pressing groove (214), wherein the inner surface of the first end of the first pressing groove (214) is connected to the outer surface of the first joint (211) via a thread; and the inner end surface of the first pressing groove (214) is in contact with the top surface of the first clamping ring (213); During the process of locking the first pressing groove (214) with the first joint (211) under the action of an external force, the inner end surface of the first pressing groove (214) moves downward, driving the first clamping ring (213) to gradually press the first spiral packing (212) onto the second end of the first joint (211).

4. The automatic deviation-adjusting sealing packing box according to claim 3, characterized in that: The second packing structure (22) comprises: a second joint (221), the second joint (221) being fixed on the top of the first joint (211), the inner surface of the first end of the second joint (221) being in contact with the outer surface of the sucker rod; a second spiral packing (222), the second spiral packing (222) being placed inside the second end of the second joint (221), and when the second spiral packing (222) is compressed, the inner surface of the second spiral packing (222) is in close contact with the outer surface of the sucker rod; A second compression ring (223), the second compression ring (223) is installed on the top of the second spiral packing (222), and the bottom surface of the second compression ring (223) is aligned with the top surface of the second spiral packing (222); A second pressing groove (224), wherein the inner surface of the first end of the second pressing groove (224) is connected to the outer surface of the second joint (221) through a thread; the inner end surface of the second pressing groove (224) is in contact with the top surface of the second clamping ring (223); During the process of locking the second pressing groove (224) with the second joint (221) under the action of an external force, the inner end surface of the second pressing groove (224) moves downward, driving the second clamping ring (223) to gradually press the second spiral packing (222) onto the second end of the second joint (221).

5. The automatic deviation-adjusting sealing packing box according to claim 3, characterized in that: The inner surface of the first joint (211) is provided with a first boss extending toward the central axis in a circumferential direction, and the first packing structure (21) further comprises: a first compression spring (215), the first compression spring (215) being disposed between the first boss and the first spiral packing (212); When the first spiral packing (212) is gradually pressed against the second end of the first joint (211), the first compression spring (215) is compressed; when the first compression groove (214) is loosened from the first joint (211) under the action of an external force, the first compression spring (215) is released, and the first compression spring (215) lifts the first spiral packing (212).

6. The automatic deviation-adjusting sealing packing box according to claim 4, characterized in that: The second pressing groove (224) is provided with a first threaded hole perpendicular to the central axis of the second pressing groove (224), and the automatic deflection-adjusting sealing packing box further comprises: a handle (50), wherein a first end of the handle (50) is engaged with the first threaded hole; When the second end of the handle (50) is subjected to external force, the handle (50) drives the second pressing groove (224) to rotate to tighten or loosen the second pressing ring (223).

7. The automatic deviation-adjusting sealing packing box according to claim 4, characterized in that: The first pressing groove (214) and the second pressing groove (224) are cast as one piece.

8. The automatic deviation-adjusting sealing packing box according to claim 1, characterized in that: The eccentric structure (3) comprises: A spherical connection structure (31), wherein the inner surface of the first end of the spherical connection structure (31) is tightly connected to the on-site pipeline through a thread; the inner surface of the second end of the spherical connection structure (31) is a first concave spherical surface; A spherical eccentric seat (32), wherein the outer surface of the first end of the spherical eccentric seat (32) is a convex spherical surface, and the convex spherical surface is tightly matched with the first concave spherical surface; the inner surface of the second end of the spherical eccentric seat (32) is tightly connected to the bottom of the high-pressure ball valve (1); The outer surface of the first end of the spherical eccentric seat (32) is provided with a clamping platform, and the top of the inner surface of the second end of the spherical connection structure (31) is provided with a clamping ring; the clamping ring acts on the clamping platform to press the spherical eccentric seat (32) into the spherical connection structure (31); when the sucker rod moves, the spherical eccentric seat (32) is driven to rotate relative to the spherical connection structure (31); during the rotation of the spherical eccentric seat (32), the convex spherical surface is always tightly matched with the inner surface of the spherical connection structure (31).

9. The automatic deviation-adjusting sealing packing box according to claim 5, characterized in that: A gap is reserved between the first boss and the sucker rod, and the gas cap structure (4) includes: a one-way valve (41) installed at the first end of the first joint (211) and communicating with the internal space of the first joint (211); the one-way valve (41) is used to allow gas to be introduced from the outside into the internal space of the first joint (211) when the first spiral packing (212) is disassembled, so that the gas pushes out the first spiral packing (212); an exhaust ball valve (42), installed at the first end of the first joint (211) and communicating with the internal space of the first joint (211); the exhaust ball valve (42) is used to exhaust the gas in the internal space of the first joint (211) when the first spiral packing (212) is installed; A casing gas connection short circuit (43) is provided, wherein a first end of the casing gas connection short circuit (43) is connected to the one-way valve (41), and a second end of the casing gas connection short circuit (43) is connected to the gas supply device; the casing gas connection short circuit (43) is used to pass the gas in the gas supply device into the internal space of the first joint (211) through the one-way valve (41).

10. The automatic deviation-adjusting sealing packing box according to claim 4, characterized in that: The first spiral packing (212) and the second spiral packing (222) are made of carbon fiber nitrile rubber composite material.

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