Limiting structure and long-shaft deep-well pump shaft seal packing taking-out device
By designing the limit structure, using the cooperation of sliders, limit blocks, push blocks and arc plates, the problem of inconvenient operation of the long-axis deep well pump shaft sealing packing remover in a narrow space is solved, and safe and efficient packing packing is achieved take out.
Patent Information
- Application Number
- CN202420915107.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The existing long-axis deep well pump shaft sealing and packing remover is inconvenient to operate in a narrow space, which can easily lead to packing breakage or slippage, posing safety hazards.
A limit structure is designed, including a moving unit and a clamping unit. Through the cooperation of sliders, limit blocks, push blocks and arc-shaped plates, the flexible adjustment and fixation of the packing hook is achieved, ensuring safe removal in a narrow space. Packing root.
It effectively solves the problem of inconvenient operation in a narrow space, improves the safety and convenience of the packing removal process, and avoids the risk of packing breakage and slippage.
Smart Images
Figure CN222494066U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of deep well pump maintenance, in particular to a limiting structure and a device for removing shaft seal packing of a long-shaft deep well pump. Background Art
[0002] A long-shaft deep well pump is a pump used to extract groundwater from deep wells. It is characterized by a long shaft system and is suitable for deep wells with deeper water levels. A long-shaft deep well pump is usually composed of an electric motor, a pump body, a shaft system, an impeller and other components. The motor drives the shaft to rotate, thereby generating centrifugal force on the impeller to pump groundwater to the surface.
[0003] Long-shaft deep-well pumps require regular maintenance or overall overhaul during use, during which the shaft seal packing of the long-shaft deep-well pump needs to be replaced; existing maintenance personnel use traditional hook packing extractors to remove the shaft seal packing; however, due to the small space at the shaft seal location, personnel can only pull the shaft seal packing obliquely, which is inconvenient for staff to operate, and the packing often breaks or suddenly slips off, posing certain safety hazards. Utility Model Content
[0004] In view of the above-mentioned prior art problems, the present utility model is proposed.
[0005] The utility model aims to provide a limiting structure, which aims to solve the problem that the existing packing extractor is inconvenient to operate in a narrow space.
[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a limiting structure, comprising: a moving unit, comprising a support frame, a slider arranged inside the support frame, a limiting block symmetrically arranged inside the slider, a push block arranged above the limiting block, and an arc plate arranged inside the slider;
[0007] The clamping unit comprises a threaded sliding block arranged on the inner side of the support frame, a clamping plate arranged inside the threaded sliding block, and a threaded compression sleeve sleeved on the outer side of the clamping plate.
[0008] As a preferred solution of the position limiting structure of the utility model, wherein: the support frame includes a slideway opened on its surface; the inner wall of the slideway is provided with multiple groups of position limiting holes distributed at equal distances;
[0009] The slider is adapted to the slideway; the slider is slidably connected to the support frame;
[0010] The limiting block is matched with the limiting hole; the end of the limiting block penetrates into the inner side of the limiting hole.
[0011] As a preferred solution of the position limiting structure of the utility model, wherein: the slider includes a cavity opened inside it; the cavity includes a slide rail opened on its surface, and a through hole penetrating the slider and extending to the outside thereof;
[0012] The limit block includes a connecting plate arranged at the bottom thereof, and a spring arranged at one side of the connecting plate;
[0013] The limit block passes through the through hole and extends to the outside thereof; the connecting plate is adapted to the slide rail; and two ends of the spring are respectively connected to the end of the connecting plate and the inner wall of the slide rail.
[0014] As a preferred solution of the position-limiting structure of the utility model, the position-limiting block further comprises an inclined slot provided on the top thereof; the push block comprises a quadrilateral sliding block provided on the end surface thereof;
[0015] The cross section of the limit block is an L-shaped structure; the inclined groove is adapted to the quadrilateral sliding block; and the limit block is slidably connected to the push block.
[0016] As a preferred solution of the limiting structure of the utility model, wherein: the arc plate includes a fixed plate arranged at the end; the fixed plate passes through the slider and extends to its outside; the arc plate is adapted to the cavity; the arc plate rotates along the axial direction of the cavity; the end of the arc plate contacts the end of the push block.
[0017] As a preferred solution of the limiting structure of the utility model, wherein: the support frame includes a vertical groove opened on its side wall; the threaded sliding block includes baffles symmetrically arranged at both ends thereof; the ends of the baffles are in contact with the side walls of the support frame; the threaded sliding block is adapted to the vertical groove; the threaded sliding block passes through the vertical groove and extends to its outside.
[0018] As a preferred solution of the position limiting structure of the utility model, wherein: the clamping plate includes a screw rod and an extrusion plate arranged at the end of the clamping plate;
[0019] The screw rod comprises a first thread matched with the threaded sliding block, and a second thread matched with the clamping plate; the clamping plate penetrates the threaded sliding block and extends to the outside thereof.
[0020] As a preferred solution of the limiting structure of the utility model, wherein: the threaded clamping sleeve includes a fixed disk arranged at its end; the interior of the fixed disk is a hollow structure, and the end of the fixed disk is in contact with the side wall of the support frame; the baffle is located on the inner side of the fixed disk.
[0021] The beneficial effects of the limiting structure of the utility model are as follows: the provided sliding block can flexibly adjust its position, and can flexibly adjust the contact position between the packing hook and the packing, thereby ensuring that the packing can be taken out in a narrow space; and the provided supporting frame cooperates with the limiting block, so that the sliding block can be fixed in a suitable position, which is convenient for the staff to operate to take out the packing.
[0022] Another object of the utility model is to provide a long-shaft deep well pump shaft seal packing removal device, which aims to solve the problem that the existing packing hook can only be pulled obliquely, resulting in packing breakage and potential safety hazards.
[0023] In order to solve the above technical problems, the utility model also provides the following technical solutions: a long-shaft deep-well pump shaft seal packing removal device, which includes a limiting structure; and a removal unit, including a hollow screw rod arranged on the inner side of the support frame, and a packing hook arranged inside the hollow screw rod;
[0024] The slider includes a screw hole penetrating therethrough; the hollow screw includes a first hexagonal column disposed at an end thereof;
[0025] The packing hook comprises a spiral hook arranged at the bottom thereof, a limiting plate arranged at the outer wall of the packing hook, and a second hexagonal column arranged at the top of the packing hook;
[0026] The hollow screw rod is threadably matched with the screw hole; the hollow screw rod penetrates the slider and extends to the bottom thereof.
[0027] As a preferred solution of the long-shaft deep-well pump shaft seal packing removal device of the utility model, wherein: the packing hook passes through the hollow screw rod and extends to its outside; the limit plate is arranged on the inner side of the first hexagonal column; the second hexagonal column is located above the first hexagonal column; and a ratchet wrench is arranged on the outside of the first hexagonal column.
[0028] The beneficial effects of the long-shaft deep-well pump shaft seal packing removal device of the utility model are as follows: the cooperation between the arranged hollow screw rod and the packing hook can better facilitate the operation of the staff; after the end of the packing hook is screwed into the packing, the hollow screw rod is then rotated to drive the packing hook to move; thereby, the packing can be removed in the vertical direction; thereby better facilitating the operation of the staff. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0030] Figure 1 It is a structural schematic diagram of the utility model.
[0031] Figure 2 It is a schematic diagram of the explosion structure in the utility model.
[0032] Figure 3 For the utility model Figure 2 A is a partial enlarged view of the
[0033] Figure 4 It is a cross-sectional view in the present utility model.
[0034] Figure 5 For the utility model Figure 4 A partial enlarged view of B.
[0035] Figure 6 It is a schematic diagram of the connection structure between the slider and the arc plate in the utility model.
[0036] Figure 7 It is a schematic diagram of the explosion structure of the limit block and the push block in the utility model. DETAILED DESCRIPTION
[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.
[0040] Example 1
[0041] Reference Figure 2-7 , which is the first embodiment of the utility model, and this embodiment provides a limiting structure, including, a moving unit 100, including a support frame 101, a slider 102 arranged on the inner side of the support frame 101, a limiting block 103 symmetrically arranged inside the slider 102, a pushing block 104 arranged above the limiting block 103, and an arc plate 105 arranged inside the slider 102.
[0042] Preferably, the structure of the support frame 101 is a concave structure, which can better pass through the pump body so that its side walls are located on both sides of the pump body; and the slider 102 is located inside the support frame 101 and slides, which can better facilitate the movement of the slider 102, thereby overcoming the inconvenience caused to the staff when the installation position of the support frame 101 cannot exactly correspond to the packing during use; and the limit block 103 is provided to pass through the slider 102, and the position between the limit block 103 and the support frame 101 corresponds, so that the position of the slider 102 can be fixed by using the limit block 103; and the movement of the push block 104 can drive the limit block 103 to move, so that the limit block 103 can pass through the outside of the slider 102, and the arc plate 105 is rotated, so that the end of the arc plate 105 can squeeze the end of the limit block 103, so that the arc plate 105 can push the push block 104 to move, and then the push block 104 can push the limit block 103 to move.
[0043] Furthermore, the support frame 101 includes a slide 101a opened on its surface; the inner wall of the slide 101a is opened with multiple groups of equally spaced limit holes 101a-1; the slider 102 is adapted to the slide 101a; the slider 102 is slidably connected to the support frame 101; the limit block 103 is adapted to the limit hole 101a-1; the end of the limit block 103 passes through the inner side of the limit hole 101a-1.
[0044] Preferably, a slideway 101a is provided at the center of the support frame 101, and a limiting plate is provided on the outer side of the slider 102, so that the slider 102 can move along the surface of the support frame 101; and a limiting block 103 is provided to pass through the slider 102 and extend outward; the limiting block 103 matches the limiting hole 101a-1; when the position of the limiting block 103 corresponds to that of the limiting hole 101a-1, the position of the slider 102 can be fixed on the inner side of the support frame 101.
[0045] Furthermore, the slider 102 includes a cavity 102b opened inside it; the cavity 102b includes a slide rail 102b-1 opened on its surface, and a through hole 102b-2 that passes through the slider 102 and extends to the outside thereof; the limit block 103 includes a connecting plate 103b arranged at the bottom thereof, and a spring 103c arranged on one side of the connecting plate 103b; the limit block 103 passes through the through hole 102b-2 and extends to the outside thereof; the connecting plate 103b is adapted to the slide rail 102b-1; and the two ends of the spring 103c respectively contact the end of the connecting plate 103b and the inner wall of the slide rail 102b-1.
[0046] Preferably, the cavity 102b is a circular ring structure, and the slide rail 102b-1 is arranged at the bottom of the inner wall of the cavity 102b; and a through hole 102b-2 is opened at a position corresponding to the slide rail 102b-1, and the connecting plate 103b is moved along the track inside the slide rail 102b-1; the limit block 103 can be pushed out of the slider 102 under normal conditions by the set spring 103c; the end of the limit block 103 extends to the inside of the limit hole 101a-1, so that the position of the slider 102 can be fixed; and the set spring 103c also plays a role in connecting the limit block 103 and the slider 102; one end of the spring 103c is fixedly connected to the connecting plate 103b, and the other end thereof is fixedly connected to the inner wall of the connecting plate 102b-1.
[0047] Furthermore, the limit block 103 also includes an inclined groove 103a opened on the top thereof; the push block 104 includes a quadrilateral slider 104a arranged on its end face; the cross section of the limit block 103 is an L-shaped structure; the inclined groove 103a is adapted to the quadrilateral slider 104a; the limit block 103 and the push block 104 are slidably connected.
[0048] Preferably, the inclined groove 103a is arranged to be inclined in the horizontal direction along the end of the limit block 103; and the inclined groove 103a is adapted to the quadrilateral slider 104a; while the push block 104 moves in the direction perpendicular to the limit block 103, the quadrilateral slider 104a can push the limit block 103 to move along the inside of the through hole 102b-2; thereby the push block 104 drives the limit block 103 to move.
[0049] Furthermore, the arc plate 105 includes a fixed plate 105a arranged at the end; the fixed plate 105a passes through the slider 102 and extends to its outside; the arc plate 105 is adapted to the cavity 102b; the arc plate 105 rotates along the axial direction of the cavity 102b; the end of the arc plate 105 contacts the end of the push block 104.
[0050] Preferably, the arc surface of the arc plate 105 is in close contact with the arc surface of the cavity 102b; and the fixed plate 105a extends to the outside of the slider 102; thereby, it is convenient for the staff to drive the arc plate 105 to move by pushing the fixed plate 105a; under normal circumstances, the two groups of fixed plates 105a are close to each other, the distance between the two groups of fixed plates 105a is increased, and then the arc plate 105 is driven to rotate along the arc surface of the cavity 102b; and then the end of the arc plate 105 squeezes the end of the push block 104, thereby pushing the push block 104 to move.
[0051] When in use, when the staff needs to adjust the position of the slider 102, the operator uses his fingers to push the two sets of fixed plates 105a away from each other, and as the fixed plate 105a moves, the arc plate 105 is driven to rotate along the arc surface of the cavity 102b; while the arc plate 105 moves, its end contacts the end of the push block 104 and pushes the push block 104 to move; as the push block 104 moves, the quadrilateral slider 104a slides along the track inside the inclined groove 103a; as the push block 104 moves, it can push the limit block 103 to move along the inner wall of the through hole 102b-2; and the provided connecting plate 103b moves with the movement of the limit block 103, and the limit block 103 moves close to the movement inside the slider 102; as the limit block 103 continues to move, the limit block 103 leaves the inside of the limit hole 101a-1; thereby, the locking limit of the slider 102 can be released; the connecting plate 1 03b continuously compresses spring 103c, so that spring 103c is in a compressed state; at this time, the slider 102 can be pushed to move along the inside of the slide 101a; when the slider 102 moves to the appropriate position; the hand pressing the fixed plate 105a is released, and at this time the rebound force of the spring 103c pushes the limit block 103 to move, so that the limit block 103 penetrates to the outside of the slider 102, and its end extends to the inside of the limit hole 101a-1; thereby, the position of the slider 102 can be fixed by the cooperation between the limit block 103 and the limit hole 101a-1; as the limit block 103 is reset, the push block 104 also returns to its original position; unlocking is achieved by opening the two sets of arc plates 105, which is contrary to the "pinching" action that people are accustomed to in daily life. To a certain extent, it can avoid accidental touch by the staff and ensure that the position of the slider 102 is fixed in the working state.
[0052] In summary, through the cooperation between the push block 104 and the limit block 103, the position of the slider 102 and the support frame 101 can be better fixed; thereby ensuring that the position of the slider 102 is fixed during operation; at the same time, after the support frame 101 is removed from both sides of the pump body, the position of the slider 102 and the support frame 101 is still fixed at this time, thereby ensuring that the slider 102 will not slip from the inside of the support frame 101, which can be more convenient for staff to use.
[0053] Example 2
[0054] Reference Figures 1 to 4 , which is the second embodiment of the utility model, includes a clamping unit 300, including a threaded sliding block 301 arranged on the inner side of the support frame 101, a clamping plate 302 arranged inside the threaded sliding block 301, and a threaded clamping sleeve 303 sleeved on the outer side of the clamping plate 302.
[0055] Preferably, the threaded sliding block 301 can support the clamping plate 302, and the clamping plate 302 and the threaded sliding block 301 are threadedly matched. By rotating the clamping plate 302, the clamping plate 302 can be rotated along the axial direction of the threaded sliding block 301 and move along the axial direction at the same time; and the threaded clamping sleeve 303 can be matched with the side wall of the support frame 101, so that the position of the support frame 101 can correspond to the position of the clamping plate 302.
[0056] Furthermore, the support frame 101 includes a vertical groove 101b opened on its side wall; the threaded sliding block 301 includes baffles 301a symmetrically arranged at both ends thereof; the ends of the baffles 301a are in contact with the side walls of the support frame 101; the threaded sliding block 301 is adapted to the vertical groove 101b; the threaded sliding block 301 passes through the vertical groove 101b and extends to its outside.
[0057] Preferably, a threaded hole is provided at the center of the threaded sliding block 301, and the threaded sliding block 301 can slide along the inside of the vertical groove 101b, so that the staff can adjust the height of the support frame 101 during use; and the baffle 301a is provided to limit the threaded sliding block 301, so that the threaded sliding block 301 can only move in the vertical direction along the vertical groove 101b.
[0058] Furthermore, the clamping plate 302 includes a screw rod 302a and an extrusion plate 302b arranged at the end of the clamping plate 302; the screw rod 302a includes a first thread 302a-1 adapted to the threaded sliding block 301, and a second thread 302a-2 adapted to the clamping plate 302; the clamping plate 302 passes through the threaded sliding block 301 and extends to its outside.
[0059] Preferably, the thread direction of the first thread 302a-1 is the same as that of the second thread 302a-2; thereby ensuring that the rotation direction of the extrusion plate 302b away from the threaded sliding block 301 is the same as the rotation direction of the threaded clamping sleeve 303 close to the threaded sliding block 301; it is more convenient for the staff to fix the position of the clamping plate 302 in advance, and then fix the position of the support frame 101.
[0060] Furthermore, the threaded compression sleeve 303 includes a fixing disk 303a disposed at its end; the interior of the fixing disk 303a is a hollow structure, and the end of the fixing disk 303a contacts the side wall of the support frame 101; the baffle 301a is located on the inner side of the fixing disk 303a.
[0061] Preferably, the fixed disk 303a is a hollow structure, and the diameter of the inner hole of the fixed disk 303a is slightly larger than the size of the baffle 301a, so that the baffle 301a can be completely embedded in the inner side of the fixed disk 303a.
[0062] When in use, the staff places the support frame 101 on both sides of the pump body, and then rotates the clamping plate 302, and uses the threaded connection between the first thread 302a-1 and the threaded sliding block 301 to push the extrusion plate 302b to contact the side wall of the pump body; after clamping both sides, the support frame 101 can be pre-fixed on both sides of the pump body. At this time, the sliding connection between the threaded sliding block 301 and the support frame 101 can be used to adjust the support frame 101 to a suitable height, and then the threaded clamping sleeve 303 is rotated, and the threaded clamping sleeve 303 and the second thread 302a-2 are threadedly matched, so that the threaded clamping sleeve 303 can contact the side wall of the support frame 101, thereby fixing the position between the support frame 101 and the threaded sliding block 301, so that the position of the support frame 101 can be fixed.
[0063] In summary, by adopting the method of fixing on both sides, the position and height of the support frame 101 can be adjusted more flexibly, which can be more convenient for the staff to use, bring convenience to the staff's work, and improve work efficiency.
[0064] Example 3
[0065] Reference Figure 1 to Figure 4 , which is the third embodiment of the utility model, and this embodiment further provides a long-axis deep-well pump shaft seal packing removal device, including, a removal unit 200, including a hollow screw rod 201 arranged on the inner side of a support frame 101, and a packing hook 202 arranged inside the hollow screw rod 201; the slider 102 includes a screw hole 102a passing through the interior thereof; the hollow screw rod 201 includes a first hexagonal column 201a arranged at an end thereof; the packing hook 202 includes a spiral hook 202a arranged at the bottom thereof, a limiting plate 202c arranged on the outer wall of the packing hook 202, and a second hexagonal column 202b arranged at the top of the packing hook 202.
[0066] Preferably, the hollow screw rod 201 is threadedly matched with the screw hole 102a, so that rotating the hollow screw rod 201 can drive the hollow screw rod 201 to move in the vertical direction of the axis of the screw hole 102a, and the packing hook 202 is located inside the hollow screw rod 201, and the horizontal positions of the hollow screw rod 201 and the packing hook 202 are fixed, and the packing hook 202 can only be located inside the hollow screw rod 201 and rotate.
[0067] Furthermore, the hollow screw rod 201 is threadedly matched with the screw hole 102a; the hollow screw rod 201 passes through the slider 102 and extends to its bottom, and the packing hook 202 passes through the hollow screw rod 201 and extends to its outside; the limit plate 202c is arranged on the inner side of the first hexagonal column 201a; the second hexagonal column 202b is located above the first hexagonal column 201a; and a ratchet wrench M is arranged on the outside of the first hexagonal column.
[0068] Preferably, the end of the packing hook 202 is penetrated to the outside of the hollow screw rod 201, and the spiral hook 202a is a spiral conical structure with a sharper end, which can be more conducive to piercing the inside of the packing; and the first hexagonal column 201a and the second hexagonal column 202b are both hexagonal structures, and can be operated by a ratchet wrench during use, and the hexagonal size of the second hexagonal column 202b is smaller than that of the first hexagonal column 201a; and the two ends of the ratchet wrench are respectively provided with ferrules that match the first hexagonal column 201a and the second hexagonal column 202b; so that the device can be better suitable for operation in small spaces.
[0069] When in use, the staff pre-fixes the position of the support frame 101 in the manner of fixing in the second embodiment; and during use of this device, it is mostly used in a manner of cooperating with two sets of devices; then adjust the position of the slider 102 and fix it in the manner of the first embodiment; then use the ratchet wrench to cover the outside of the second hexagonal column 202b; then move the ratchet wrench to drive the end of the spiral hook 202a to continuously penetrate into the packing, and as the spiral hook 202a continues to penetrate, the support frame 101 slides along the outside of the threaded sliding block 301; as the spiral hook 202a completely penetrates into the packing; then use the operating steps in the second embodiment to fix the position between the support frame 101 and the threaded sliding block 301; then put the ratchet wrench on the outside of the first hexagonal column 201a, and then drive the hollow screw 201 to move along the axis of the slider 102, and the two sets of devices are operated simultaneously, so that the hollow screw 201 can move upward to drive the packing hook 202 to move, so that the packing can be taken out from the inside of the pump body.
[0070] In summary, the cooperation between the hollow screw rod and the packing hook can better facilitate the operation of the staff; after the end of the packing hook is screwed into the packing, the hollow screw rod is rotated to drive the packing hook to move; thereby, the packing can be taken out in the vertical direction; thus, it is better convenient for the staff to operate.
[0071] It is important to note that the above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A limiting structure, characterized in that: include, The mobile unit (100) comprises a support frame (101), a slider (102) arranged inside the support frame (101), a limit block (103) symmetrically arranged inside the slider (102), a push block (104) arranged above the limit block (103), and an arc plate (105) arranged inside the slider (102); The clamping unit (300) comprises a threaded sliding block (301) arranged on the inner side of the support frame (101), a clamping plate (302) arranged inside the threaded sliding block (301), and a threaded compression sleeve (303) sleeved on the outer side of the clamping plate (302).
2. The limiting structure according to claim 1, characterized in that: The support frame (101) comprises a slideway (101a) provided on its surface; the inner wall of the slideway (101a) is provided with a plurality of groups of equally spaced limiting holes (101a-1); The slider (102) is adapted to the slideway (101a); the slider (102) is slidably connected to the support frame (101); The limiting block (103) is matched with the limiting hole (101a-1); and the end of the limiting block (103) penetrates into the inner side of the limiting hole (101a-1).
3. The limiting structure according to claim 2, characterized in that: The slider (102) comprises a cavity (102b) opened inside the slider; the cavity (102b) comprises a slide rail (102b-1) opened on the surface thereof, and a through hole (102b-2) penetrating the slider (102) and extending to the outside thereof; The limit block (103) comprises a connecting plate (103b) arranged at the bottom thereof, and a spring (103c) arranged at one side of the connecting plate (103b); The limit block (103) passes through the through hole (102b-2) and extends to the outside thereof; the connecting plate (103b) is adapted to the slide rail (102b-1); and two ends of the spring (103c) are respectively connected to the end of the connecting plate (103b) and the inner wall of the slide rail (102b-1).
4. The limiting structure according to claim 3, characterized in that: The limit block (103) further comprises an inclined groove (103a) provided on the top thereof; the push block (104) comprises a quadrilateral sliding block (104a) provided on the end surface thereof; The cross section of the limit block (103) is an L-shaped structure; the inclined groove (103a) is adapted to the quadrilateral sliding block (104a); and the limit block (103) is slidably connected to the push block (104).
5. The limiting structure according to claim 4, characterized in that: The arc plate (105) comprises a fixing plate (105a) arranged at an end; the fixing plate (105a) penetrates the slider (102) and extends to the outside thereof; the arc plate (105) is adapted to the cavity (102b); the arc plate (105) rotates along the axial direction of the cavity (102b); and the end of the arc plate (105) contacts the end of the push block (104).
6. The limiting structure according to any one of claims 1 or 5, characterized in that: The support frame (101) includes a vertical groove (101b) opened on the side wall thereof; the threaded sliding block (301) includes baffles (301a) symmetrically arranged at both ends thereof; the ends of the baffles (301a) are in contact with the side wall of the support frame (101); the threaded sliding block (301) is adapted to the vertical groove (101b); the threaded sliding block (301) passes through the vertical groove (101b) and extends to the outside thereof.
7. The limiting structure according to claim 6, characterized in that: The clamping plate (302) comprises a screw rod (302a) and an extrusion plate (302b) arranged at the end of the clamping plate (302); The screw rod (302a) comprises a first thread (302a-1) adapted to the threaded sliding block (301), and a second thread (302a-2) adapted to the clamping plate (302); the clamping plate (302) penetrates the threaded sliding block (301) and extends to the outside thereof.
8. The limiting structure according to claim 7, characterized in that: The threaded compression sleeve (303) comprises a fixing disk (303a) arranged at its end; the interior of the fixing disk (303a) is a hollow structure, and the end of the fixing disk (303a) is in contact with the side wall of the support frame (101); the baffle (301a) is located on the inner side of the fixing disk (303a).
9. A long-shaft deep-well pump shaft seal packing removal device, characterized in that: comprising the limiting structure according to any one of claims 1 to 8; and A taking-out unit (200) comprises a hollow screw rod (201) arranged inside the support frame (101), and a packing hook (202) arranged inside the hollow screw rod (201); The slider (102) includes a screw hole (102a) penetrating the interior thereof; the hollow screw rod (201) includes a first hexagonal column (201a) disposed at an end thereof; The packing hook (202) comprises a spiral hook (202a) arranged at the bottom thereof, a limiting plate (202c) arranged on the outer wall of the packing hook (202), and a second hexagonal column (202b) arranged at the top of the packing hook (202); The hollow screw rod (201) is threadably matched with the screw hole (102a); the hollow screw rod (201) passes through the slider (102) and extends to the bottom thereof.
10. The long-shaft deep-well pump shaft seal packing removal device according to claim 9, characterized in that: The packing hook (202) passes through the hollow screw rod (201) and extends to the outside thereof; the limiting plate (202c) is arranged inside the first hexagonal column (201a); the second hexagonal column (202b) is located above the first hexagonal column (201a); and a ratchet wrench (M) is arranged on the outside of the first hexagonal column.