Retractable Slide Spear

Abstract

The invention discloses a retractable slider spear, relates to the field of mining equipment, and solves the problem that the slips of the existing retractable slider spear are prone to get stuck when in use. The invention comprises an upper joint, a spear fishing mechanism and an exit mechanism, wherein one end of the upper joint is fixedly connected with a spear rod, the spear fishing mechanism comprises a sliding frame, a slip and a sleeve pipe, a guide groove is provided on the side of the spear rod, and the exit mechanism comprises a sliding block, a limiting member and a driving pipe. The retractable slider spear is convenient for synchronously driving multiple groups of sliding frames to be lifted and lowered by lifting and lowering the sleeve pipe, so that the sliding frames can tilt and slide in the guide grooves, control the distance between the slips and the inner wall of the fish falling, and realize automatic clamping and salvaging operation. When the driving pipe is pulled to move the sleeve pipe, the limiting member is preferentially controlled to release the limit on the sliding block, and then the sliding block and the slip are synchronously driven to slide horizontally to a side away from the fish falling by a set distance, and after the interference between the slips and the fish falling is released, the sleeve pipe is controlled to move upward to complete the exit operation.

Description

Technical Field

[0001] The invention relates to the technical field of mining equipment, in particular to a retractable slider spear. Background Art

[0002] The slider spear is a commonly used salvage tool in well repair operations at oil production sites. It is used to salvage downhole pipes and other objects with inner holes (generally referred to as fish) such as drill pipes, oil pipes, casing milling pipes, village pipes, packers, distributors, and production distributors. It can also be used to reverse the stuck objects or be used in conjunction with other tools. When the top of the fish in the well is intact and the situation of the objects is clear, the slider spear has the advantages of simple operation and high success rate of salvage compared to other salvage tools. After the objects are salvaged, they can be unstuck by large-load up and down activities, or reversed.

[0003] Some existing retractable slider spears directly control the slips to move upward when they are retracted. At this time, although the slips have a certain tendency to move away from the fish, the direction of this movement trend is relatively inclined. When the inner wall of the fish is not smooth and there are some protrusions blocking the movement direction, the slips will be stuck inside the fish, making it difficult to separate the spear from the fish later. To this end, we propose a retractable slider spear. Summary of the invention

[0004] The object of the present invention is to provide a retractable slider spear which is convenient for improving the withdrawal efficiency and avoiding the jamming situation, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a retractable sliding block spear, comprising an upper joint, a spear catching mechanism and an exit mechanism, one end of the upper joint is fixedly connected to a spear rod, and the end of the spear rod away from the upper joint is fixedly connected to a top block, the upper joint, the spear rod and the top block are all provided with water holes that are interconnected, the spear catching mechanism comprises a plurality of sliding frames installed on the side of the spear rod, the sliding frame is provided with slips, a plurality of guide grooves are evenly provided on the side of the spear rod, the guide grooves are inclined, the sliding frame is slidably connected to the inner wall of the guide groove, the outer wall of the spear rod is movably sleeved with a sleeve tube, the sleeve tube is provided with a plurality of sliding grooves that can be slidably connected to the sliding frame in a horizontal direction, and the plurality of sliding frames are driven to rise and fall synchronously through the lifting and lowering of the sleeve tube, so that the sliding frames are The guide groove is tilted and slides to control the distance between the slippery body and the inner wall of the fallen fish, so as to realize the automatic clamping and salvaging operation. The exit mechanism comprises a sliding block which is slidably connected to the inner wall of the sliding frame in a horizontal direction, and the slippery body is fixedly connected to one end of the sliding block. A limiting member for limiting the position of the sliding block is provided in the sliding frame, and a driving tube is slidably connected to the outer wall of the sleeve tube, which is used to preferentially control the limiting member to release the limit on the sliding block when the driving tube is pulled to move the sleeve tube, and then drive the sliding block and the slippery body to synchronously slide horizontally to the side away from the fallen fish for a set distance. After the conflict between the slippery body and the fallen fish is released, the sleeve tube is controlled to move upward, so as to drive the sliding frame to move tiltedly as a whole, and complete the exit operation, so as to improve the exit efficiency and avoid jamming.

[0006] Preferably, the limiting member includes a fixed frame fixedly installed in the sliding frame, a driving plate is slidably connected to the fixed frame in a vertical direction, one side of the driving plate is fixedly connected to a first tension spring fixedly connected to the fixed frame, a side of the driving plate away from the first tension spring is fixedly connected to a first spring, an end of the first spring away from the driving plate is fixedly connected to a first beveled tooth block slidably connected to the fixed frame in a vertical direction, the sliding block is slidably connected to an outer wall of the fixed frame, and a side of the sliding block is provided with a beveled tooth groove that can be engaged with the first beveled tooth block, so as to facilitate limiting the position of the sliding block.

[0007] Preferably, the exit mechanism also includes a sliding plate connected to the inner wall of the sliding frame in a horizontal sliding direction, one side of the sliding plate is fixedly connected to a second spring fixedly connected to the sliding frame, and the side of the sliding plate away from the second spring is fixedly connected to a second tension spring fixedly connected to the sliding block, and the sliding plate is provided with a control member for controlling the engagement state of the first bevel tooth block and the bevel tooth groove, so that when the driving tube is pulled to move the sleeve tube, the limit member is preferentially controlled to release the limit on the sliding block, and then the sliding block and the cava are synchronously driven to slide horizontally a set distance to the side away from the fallen fish, and after the conflict between the cava and the fallen fish is released, the sleeve tube is controlled to move upward, driving the sliding frame as a whole to tilt and move, thereby completing the exit operation.

[0008] Preferably, the control member includes a pushing block fixedly mounted on the sliding plate, the pushing block is slidably connected to the fixed frame in a horizontal direction, a side surface of the pushing block is provided with a first inclined surface, a side surface of the driving plate is provided with a second inclined surface that can slide in contact with the first inclined surface, and a driving member for controlling the position state of the sliding plate is provided on the driving tube, so as to facilitate controlling the engagement state of the first bevel tooth block and the bevel tooth groove.

[0009] Preferably, the driving member includes a rotating disk rotatably connected to the top end of the driving tube, a plurality of groups of connecting rods are evenly arranged on the rotating disk, a connecting rope is fixedly connected to the connecting rod, the connecting rope passes through the lance rod and is slidably connected to the inner wall of the lance rod, an end of the connecting rope away from the connecting rod is fixedly connected to one side of the sliding plate, a lifting groove is provided on the lance rod and is slidably connected to the connecting rod along the vertical direction, and a third tension spring fixedly connected to the driving tube is fixedly connected to the upper end of the sleeve tube, so as to facilitate controlling the position state of the sliding plate.

[0010] Preferably, the side surface of the lance rod is provided with a plurality of groups of engaging grooves respectively connected with the top ends of the lifting grooves, and the connecting rod can be rotatably engaged with the engaging grooves, so as to limit the positions of the connecting rod and the rotating disk.

[0011] Preferably, the spear scooping mechanism further comprises a limit block fixedly mounted on the side of the sliding frame, and a limit slot slidably connected to the limit block is provided in the guide slot, so as to facilitate guiding the sliding frame.

[0012] Preferably, an oil filling pipe connected to the limiting groove is provided on the side surface of the bottom end of the lance rod, so as to facilitate the injection of lubricating oil into the limiting groove and improve the smoothness.

[0013] Preferably, a plurality of groups of second beveled tooth blocks are evenly and fixedly connected to the side surface of the cava, and the bevel of the second beveled tooth block is tilted downward to reduce the thrust on the inner wall of the fallen fish when moving downward and increase the pulling friction on the inner wall of the fallen fish when moving upward.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The retractable slider spear provided by the present invention solves the problem that the existing retractable slider spear is prone to getting stuck when the slip is tilted and withdrawn during use. It is convenient to synchronously drive multiple groups of sliding frames to rise and fall through the lifting and lowering of the sleeve tube, so that the sliding frames can tilt and slide in the guide groove, control the distance between the slip and the inner wall of the fish, and realize automatic clamping and salvaging operation. When the withdrawal operation is required, the driving tube is pulled to move the sleeve tube, and the limit member is preferentially controlled to release the limit on the sliding block, and then the sliding block and the slip are driven to synchronously slide horizontally to the side away from the fish for a set distance. After the conflict between the slip and the fish is released, the sleeve tube is controlled to move upward, and the sliding frame is driven to tilt and move as a whole to complete the withdrawal operation. The surface structure of the device is relatively flat, which is easy to use and clean. At the same time, the operation is convenient and efficient. The purpose of automatically releasing the stuck state and completing the withdrawal operation can be achieved by pulling the driving tube, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the partial structure of the spear fishing mechanism of the present invention;

[0018] Figure 3 for Figure 2 A magnified image of the middle A area;

[0019] Figure 4 It is a partial structural cross-sectional view of the spear fishing mechanism of the present invention;

[0020] Figure 5 for Figure 4 Enlarged view of area B;

[0021] Figure 6 for Figure 4 Enlarged view of area C in the middle;

[0022] Figure 7 It is a partial structural schematic diagram of the exit mechanism of the present invention;

[0023] Figure 8 It is a partial structural cross-sectional view of the exit mechanism of the present invention;

[0024] Fig. 9 for Figure 8 Enlarged view of area D in the middle;

[0025] Fig.10 It is an exploded view of the local structure of the exit mechanism of the present invention.

[0026] In the figure: 1-upper joint; 2-spear rod; 3-top block; 4-water eye; 5-spear fishing mechanism; 6-sliding frame; 7-slip; 8-guide groove; 9-sleeve tube; 10-sliding groove; 11-exit mechanism; 12-sliding block; 13-limiting member; 14-driving pipe; 15-fixed frame; 16-driving plate; 17-first tension spring; 18-first spring; 19-first oblique tooth block; 20-oblique tooth groove; 21-sliding plate; 22-second spring; 23-second tension spring; 24-control member; 25-pushing block; 26-first inclined surface; 27-second inclined surface; 28-driving member; 29-rotating disk; 30-connecting rod; 31-connecting rope; 32-lifting groove; 33-third tension spring; 34-limiting block; 35-limiting groove; 36-clamping groove; 37-oil filling pipe; 38-second oblique tooth block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figure 1-Figure 10 The retractable slider spear shown in the figure includes an upper joint 1, a spear catching mechanism 5 and an exit mechanism 11. One end of the upper joint 1 is fixedly connected to a spear rod 2, and the end of the spear rod 2 away from the upper joint 1 is fixedly connected to a top block 3. The upper joint 1, the spear rod 2 and the top block 3 are all provided with interconnected water holes 4, through which the top of the fish can be washed to avoid being blocked by impurities during the docking process. The spear catching mechanism 5 includes a plurality of sliding frames 6 installed on the side of the spear rod 2, and a slip 7 is provided on the sliding frame 6. The side of the slip 7 is evenly and fixedly connected with a plurality of second beveled tooth blocks. 38. The inclined surface of the second bevel tooth block 38 is tilted downward, and a plurality of guide grooves 8 are evenly arranged on the side of the spear rod 2. The guide grooves 8 are tilted, and the sliding frame 6 is slidably connected to the inner wall of the guide groove 8. The outer wall of the spear rod 2 is movably sleeved with a sleeve tube 9, and the sleeve tube 9 is provided with a plurality of sliding grooves 10 that can be slidably connected to the sliding frame 6 in the horizontal direction, which is used to synchronously drive the plurality of sliding frames 6 to rise and fall through the lifting and lowering of the sleeve tube 9, so that the sliding frame 6 tilts and slides in the guide groove 8, controls the distance between the slip 7 and the inner wall of the fish, and realizes the automatic clamping and salvaging operation.

[0030] The exit mechanism 11 includes a sliding block 12 which is slidably connected to the inner wall of the sliding frame 6 in a horizontal direction, and the cava 7 is fixedly connected to one end of the sliding block 12. A limit piece 13 for limiting the position of the sliding block 12 is provided in the sliding frame 6. A driving tube 14 is slidably connected to the outer wall of the sleeve tube 9, which is used to preferentially control the limit piece 13 to release the limit on the sliding block 12 when the driving tube 14 is pulled to move the sleeve tube 9, and then drive the sliding block 12 and the cava 7 to slide horizontally to the side away from the fallen fish for a set distance synchronously. After the conflict between the cava 7 and the fallen fish is released, the sleeve tube 9 is controlled to move upward, driving the sliding frame 6 to tilt as a whole to complete the exit operation.

[0031] The limiting member 13 includes a fixed frame 15 fixedly installed in the sliding frame 6, a driving plate 16 is slidably connected in the fixed frame 15 along the vertical direction, a first tension spring 17 fixedly connected to the fixed frame 15 is fixedly connected to one side of the driving plate 16, a first spring 18 is fixedly connected to the side of the driving plate 16 away from the first tension spring 17, and an end of the first spring 18 away from the driving plate 16 is fixedly connected to a first beveled tooth block 19 slidably connected to the fixed frame 15 along the vertical direction, the sliding block 12 is slidably connected to the outer wall of the fixed frame 15, and a beveled tooth groove 20 that can be engaged with the first beveled tooth block 19 is opened on the side of the sliding block 12.

[0032] The exit mechanism 11 also includes a sliding plate 21 which is slidably connected to the inner wall of the sliding frame 6 in a horizontal direction. A second spring 22 which is fixedly connected to the sliding frame 6 is fixedly connected to one side of the sliding plate 21. A second tension spring 23 which is fixedly connected to the sliding block 12 is fixedly connected to the side of the sliding plate 21 away from the second spring 22. A control member 24 for controlling the engagement state of the first bevel tooth block 19 and the bevel tooth groove 20 is provided on the sliding plate 21.

[0033] The control member 24 includes a pushing block 25 fixedly mounted on the sliding plate 21. The pushing block 25 is slidably connected to the fixed frame 15 in a horizontal direction. A first inclined surface 26 is provided on the side of the pushing block 25. A second inclined surface 27 that can slide and fit with the first inclined surface 26 is provided on the side of the driving plate 16. A driving member 28 for controlling the position state of the sliding plate 21 is provided on the driving tube 14.

[0034] The driving member 28 includes a rotating disk 29 rotatably connected to the top end of the driving tube 14, and a plurality of connecting rods 30 are evenly arranged on the rotating disk 29. A connecting rope 31 is fixedly connected to the connecting rod 30. The connecting rope 31 passes through the lance rod 2 and is slidably connected to the inner wall of the lance rod 2. One end of the connecting rope 31 away from the connecting rod 30 is fixedly connected to one side of the sliding plate 21. The lance rod 2 is provided with a lifting groove 32 slidably connected to the connecting rod 30 in a vertical direction. The upper end of the sleeve tube 9 is fixedly connected to a third tension spring 33 fixedly connected to the driving tube 14.

[0035] When the top of the fish falls, the sliding frame 6 is pushed upward, thereby driving the sleeve pipe 9 to make all the sliding frames 6 move upward synchronously. During the process of tilting and moving upward in the guide groove 8, the sliding frame 6 will gradually shrink inward, so that the slip 7 gradually fits the top of the fish and slides horizontally until it can move down into the cavity of the fish. After that, the top of the fish releases the support of the sliding frame 6, and the tip of the second oblique tooth block 38 of the slip 7 fits the inner wall of the fish and moves downward. After reaching the required position, the upper joint 1 is pulled to drive the spear rod 2 to move upward. The upper end of the second oblique tooth block 38 is a horizontal plane, which can better fit the inner wall of the fish and get stuck. During the pulling process, the inner wall of the fish drives the slip 7 to move downward, so that the sliding frame 6 has a tendency to slide down in the guide groove 8, thereby ensuring that the slip 7 is continuously pushed outward during the pulling process, and is tightly engaged and in conflict with the inner wall of the fish until the fish is salvaged.

[0036] Before salvaging, the sleeve tube 9 drives the driving tube 14 to fall naturally to the bottom end, and the bottom of the sleeve tube 9 conflicts with the top surface of the top block 3. At this time, the sliding frame 6 is at the bottom of the guide groove 8, and the slip 7 is at the maximum displacement position away from the spear rod 2. At this time, the second spring 22 pushes the sliding plate 21 to move with the sliding block 12, and the sliding frame 6 lifts the first bevel tooth block 19 until the first bevel tooth block 19 is engaged with the bevel tooth groove 20, completing the position limitation of the sliding block 12 and the slip 7, so that the positions of the sliding block 12 and the sliding frame 6 are relatively fixed during normal salvage, and no relative sliding occurs. In the process of the sleeve tube 9 driving the sliding frame 6 to rise and fall, the connecting rope 31 and the rotating disk 29 are also lifted and lowered synchronously.

[0037] When it is necessary to exit, pull up the drive tube 14, and the drive tube 14 drives the third tension spring 33 to move upward, thereby driving the sleeve tube 9 to move upward. At this time, if the second bevel tooth block 38 is not directly stuck with the inner wall of the fish falling wall, the sleeve tube 9 will directly drive the sliding frame 6 to slide upward, thereby causing the cava 7 and the second bevel tooth block 38 to tilt upward and release the stuck connection with the inner wall of the fish falling wall.

[0038] If the second bevel gear block 38 is stuck, it is difficult for the second bevel gear block 38 to slide out obliquely upward. At this time, the position of the sleeve tube 9 is stuck, and the driving tube 14 continues to pull up, driving the rotating disk 29 to move up. The rotating disk 29 drives the connecting rod 30 to pull one end of the connecting rope 31, so that the sliding plate 21 slides toward the second spring 22. The sliding plate 21 drives the push block 25 to slide, and the push block 25 gradually releases the resistance to the top surface of the driving plate 16, so that the driving plate 16 moves upward under the pull of the first tension spring 17. The driving plate 1 6 drives the first spring 18 to pull the first oblique tooth block 19 upward to release the clamping of the oblique tooth groove 20. After that, the sliding plate 21 continues to slide to pull the second tension spring 23 to make the sliding block 12 slide horizontally toward the inner wall of the sliding frame 6, driving the slip 7 to slide horizontally to release the stuck state between the second oblique tooth block 38 and the inner wall of the fish falling. After that, the third tension spring 33 can continue to pull the sleeve tube 9 upward, so that the sliding frame 6 and the slip 7 slide obliquely upward and continue to move away from the fish falling. The spear rod 2 is pulled out to complete the exit operation.

[0039] Afterwards, the driving tube 14 is released, the third tension spring 33 is pulled back and reset, and the rotating disk 29 is close to the top of the sleeve tube 9, which can reduce the tension of the connecting rope 31, and the second spring 22 rebounds, pushing the sliding plate 21 and the pushing block 25 to move, and the first inclined surface 26 and the second inclined surface 27 slide in contact with each other, pushing the driving plate 16 to move downward, and the first tension spring 17 is stretched, and the driving plate 16 pushes the first spring 18 and the first bevel gear block 19 to move downward and reset. At the same time, the sliding plate 21 also pushes the sliding block 12 to move. During the movement of the sliding block 12, it continuously contacts the first bevel gear block 19 to move up and compress the first spring 18 until the bevel tooth groove 20 and the position of the first bevel gear block 19 are engaged to complete the limit, and then it can be used next time.

[0040] It is worth noting that the horizontal movement distance of the slips 7 and the sliding block 12 in the sliding frame 6 is relatively short, with a maximum displacement of 1 cm, and there will be no unstable situations such as excessive sliding distance and insufficient internal support strength of the sliding frame 6.

[0041] Example 2

[0042] See also Figure 1-Figure 10 Embodiment 2 is described. This embodiment further describes Embodiment 1. The spear catching mechanism 5 shown in the figure further includes a limit block 34 fixedly mounted on the side of the sliding frame 6. A limit groove 35 slidably connected to the limit block 34 is provided in the guide groove 8. A plurality of groups of engaging grooves 36 respectively connected to the top of the lifting groove 32 are provided on the side of the spear rod 2. The connecting rod 30 can be rotatably engaged with the engaging groove 36. An oil filling pipe 37 connected to the limit groove 35 is provided on the side of the bottom end of the spear rod 2.

[0043] In this embodiment, injecting lubricating oil into the limit groove 35 through the oil filling pipe 37 can effectively reduce the friction between the limit block 34 and the limit groove 35, so that the sliding frame 6 can slide more smoothly inside the guide groove 8, avoiding the sliding frame 6 from getting stuck in the guide groove 8. When the equipment is not in use, the rotating disk 29 can also be moved to the end close to the upper joint 1, and the rotating disk 29 can be rotated so that the connecting rod 30 is rotated into the clamping groove 36 for clamping and limiting. At this time, the extended length of the cava 7 is the shortest, and the outer wall of the second bevel tooth block 38 is flush with the outer wall of the sleeve 9, so that the surface of the device is relatively smooth, avoiding the position of the cava 7 from being hit or worn.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A retractable slider spear, comprising an upper joint (1), one end of the upper joint (1) being fixedly connected to a spear rod (2), an end of the spear rod (2) away from the upper joint (1) being fixedly connected to a top block (3), the upper joint (1), the spear rod (2) and the top block (3) all having water holes (4) in communication with each other, characterized in that: Also includes: A spear catching mechanism (5), the spear catching mechanism (5) comprising a plurality of sliding frames (6) mounted on the side of the spear rod (2), a slip (7) being provided on the sliding frame (6), a plurality of guide grooves (8) being evenly arranged on the side of the spear rod (2), the guide grooves (8) being inclined, the sliding frame (6) being slidably connected to the inner wall of the guide groove (8), a sleeve tube (9) being movably sleeved on the outer wall of the spear rod (2), the sleeve tube (9) being provided with a plurality of sliding grooves (10) capable of being slidably connected to the sliding frame (6) in a horizontal direction, and being used for synchronously driving the plurality of sliding frames (6) to be raised and lowered by the sleeve tube (9), so that the sliding frame (6) slides obliquely in the guide groove (8), controlling the distance between the slip (7) and the inner wall of the fish, and realizing an automatic clamping and catching operation; An exit mechanism (11), the exit mechanism (11) comprising a sliding block (12) slidably connected to the inner wall of the sliding frame (6) in a horizontal direction, the slip (7) being fixedly connected to one end of the sliding block (12), the sliding frame (6) being provided with a limiting member (13) for limiting the position of the sliding block (12), the outer wall of the sleeve tube (9) being slidably connected with a driving tube (14), for preferentially controlling the limiting member (13) to release the limit on the sliding block (12) when the driving tube (14) is pulled to move the sleeve tube (9), and then driving the sliding block (12) and the slip (7) to synchronously slide horizontally to a side away from the falling fish by a set distance, and after releasing the conflict between the slip (7) and the falling fish, controlling the sleeve tube (9) to move upward, driving the sliding frame (6) as a whole to move in an inclined manner, thereby completing the exit operation; The limiting member (13) comprises a fixed frame (15) fixedly installed in the sliding frame (6); a driving plate (16) is slidably connected to the fixed frame (15) in a vertical direction; a first tension spring (17) fixedly connected to the fixed frame (15) is fixedly connected to one side of the driving plate (16); a first spring (18) is fixedly connected to the side of the driving plate (16) away from the first tension spring (17); an end of the first spring (18) away from the driving plate (16) is fixedly connected to a first beveled tooth block (19) slidably connected to the fixed frame (15) in a vertical direction; the sliding block (12) is slidably connected to an outer wall of the fixed frame (15); and a beveled tooth groove (20) capable of engaging with the first beveled tooth block (19) is provided on a side of the sliding block (12).

2. The retractable slider spear according to claim 1, characterized in that: The exit mechanism (11) further comprises a sliding plate (21) connected to the inner wall of the sliding frame (6) in a horizontal sliding direction, a second spring (22) fixedly connected to the sliding frame (6) is fixedly connected to one side of the sliding plate (21), a second tension spring (23) fixedly connected to the sliding block (12) is fixedly connected to the side of the sliding plate (21) away from the second spring (22), and a control member (24) for controlling the engagement state of the first bevel tooth block (19) and the bevel tooth groove (20) is provided on the sliding plate (21).

3. The retractable slider spear according to claim 2, characterized in that: The control member (24) comprises a pushing block (25) fixedly mounted on the sliding plate (21); the pushing block (25) is slidably connected to the fixed frame (15) in a horizontal direction; a first inclined surface (26) is provided on a side surface of the pushing block (25); a second inclined surface (27) capable of slidingly engaging with the first inclined surface (26) is provided on a side surface of the driving plate (16); and a driving member (28) for controlling the position state of the sliding plate (21) is provided on the driving tube (14).

4. The retractable slider spear according to claim 3, characterized in that: The driving member (28) comprises a rotating disk (29) rotatably connected to the top end of the driving tube (14); a plurality of connecting rods (30) are evenly arranged on the rotating disk (29); a connecting rope (31) is fixedly connected to the connecting rod (30); the connecting rope (31) passes through the lance rod (2) and is slidably connected to the inner wall of the lance rod (2); an end of the connecting rope (31) away from the connecting rod (30) is fixedly connected to one side of the sliding plate (21); a lifting groove (32) is arranged on the lance rod (2) and is slidably connected to the connecting rod (30) in a vertical direction; and a third tension spring (33) fixedly connected to the driving tube (14) is fixedly connected to the upper end of the sleeve tube (9).

5. The retractable slider spear according to claim 4, characterized in that: The side surface of the spear rod (2) is provided with a plurality of groups of engaging grooves (36) respectively connected to the top ends of the lifting grooves (32), and the connecting rod (30) can be rotatably engaged with the engaging grooves (36).

6. The retractable slider spear according to claim 1, characterized in that: The spear catching mechanism (5) further comprises a limit block (34) fixedly mounted on the side of the sliding frame (6), and a limit groove (35) slidably connected to the limit block (34) is provided in the guide groove (8).

7. The retractable slider spear according to claim 6, characterized in that: An oil injection pipe (37) connected to the limiting groove (35) is provided on the side surface of the bottom end of the lance (2).

8. The retractable slider spear according to claim 1, characterized in that: The side surfaces of the slips (7) are evenly and fixedly connected with a plurality of groups of second bevel gear blocks (38), and the bevel surfaces of the second bevel gear blocks (38) are arranged to be inclined downward.

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