CN111376204A

CN111376204A - Threading and retreating device and threading and retreating system

Info

Publication number: CN111376204A
Application number: CN202010302210.1A
Authority: CN
Inventors: 郑超; 戴振宇; 罗俊杰
Original assignee: Guodian Daduhe Maintenance & Installation Co ltd
Current assignee: Guodian Daduhe Maintenance & Installation Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-07-07

Abstract

The invention provides a penetration and retreat device and a penetration and retreat system, wherein the penetration and retreat device is used for penetrating and retreating a piece to be pushed which is arranged on a fixed piece, and the penetration and retreat device comprises: the bracket is connected with the fixing piece and comprises at least two bracket bodies; and the pushing device is arranged on the bracket, wherein the two bracket bodies are connected through the pushing device and rotate by taking the pushing device as a center. The problem of round pin axle wear to move back the degree of difficulty big is solved. The penetration and retreat device is used for rapid penetration and retreat of the gate pull rod and the pin shaft, shortens penetration and retreat time, and improves penetration and retreat efficiency; the safety of the operating personnel in the process of penetrating and withdrawing is ensured, the damage to the pull rod and the pin shaft in the process of penetrating and withdrawing is avoided, and the service life of the pull rod and the pin shaft is prolonged.

Description

Threading and retreating device and threading and retreating system

Technical Field

The invention belongs to the technical field of disassembling tools, and particularly relates to a penetrating and retreating device and a penetrating and retreating system.

Background

Many gates and trash racks in the hydropower station are opened or closed by matching a movable portal crane with a plurality of sections of pull rods, and the pull rods are connected through pin shafts. The phenomena of corrosion, sludge blockage and the like can occur due to the fact that the pull rod and the pin shaft are soaked in water for a long time, and therefore great difficulty is brought to the penetrating and retreating work of the pin shaft. At present, the solution to the problems is mainly to knock metal objects such as a sledge hammer, a copper bar and the like, on one hand, mechanical damage to a pull rod and a pin shaft is easily caused by metal knocking, and the service life of the pull rod and the pin shaft is influenced; on the other hand, the operator stands on the edge of the orifice of the gate slot for a long time to swing and throw the sledgehammer, and the safety risk is huge.

Disclosure of Invention

The invention aims to provide a penetration and retreat device and a penetration and retreat system, and solves the problem of high penetration and retreat difficulty of a pin shaft.

The technical scheme adopted by the invention is as follows:

in a first aspect, the present disclosure provides a penetration and retraction device for penetrating and retracting a to-be-pushed member mounted on a fixed member, the penetration and retraction device including:

the bracket is connected with the fixing piece and comprises at least two bracket bodies; and

the pushing device is arranged on the bracket, and at least part of the pushing device can move relative to the bracket, so that at least part of the pushing device is connected with the part to be pushed until the part to be pushed penetrates and retreats from the fixing piece;

wherein, the bracket bodies are connected through the pushing device and rotate by taking the pushing device as the center.

The penetration and retreat device avoids manual penetration and retreat, improves the penetration and retreat efficiency of the to-be-pushed piece, ensures the stability of force application in the penetration and retreat process, avoids the damage to the to-be-pushed piece in the penetration and retreat process, and avoids potential safety hazards caused by manual penetration and retreat; the rotatable support is arranged, so that the penetration and retreat device is connected with the to-be-pushed pieces of different sizes, the application range of the penetration and retreat device is enlarged, and the market popularization is facilitated.

Preferably, the bracket body comprises a transverse plate, a vertical plate connected with the transverse plate and support legs positioned on the vertical plate, and the transverse plate is connected with the pushing device;

and the adjacent support bodies form a clamping space through the vertical plate, and when the pushing piece is pushed back, the fixing piece is positioned in the clamping space and is abutted against the support leg.

Preferably, there are two vertical plates, and one end of each vertical plate is connected with the end part of the transverse plate, and the other end of each vertical plate is connected with the support leg.

Preferably, the support also includes the coupling assembling of the contained angle between the adjacent stake body of regulation, coupling assembling can dismantle the setting on the support.

Preferably, the connecting assembly comprises a connecting plate, a sliding groove on the connecting plate and a connecting structure arranged in the sliding groove in a sliding manner;

one end of the connecting plate is a fixed end fixedly connected with one bracket body, and the other end of the connecting plate is a movable end movably connected with the adjacent bracket body;

the connecting structure penetrates through the sliding groove to be connected with the bracket body.

Preferably, the pushing device comprises a pushing rod and a hinge part connecting the pushing rod and the bracket, and a hole body matched with the pushing rod is arranged on the hinge part.

Preferably, the catch bar includes the first body of rod and with the second body of rod that links to each other can be dismantled to the first body of rod, and the first body of rod slides and sets up in the hole is internal, the second body of rod is located the below of the first body of rod.

Preferably, the pushing device further comprises a driver, and the driver is fixed on the bracket and connected with the pushing rod.

In a second aspect, the present disclosure further provides a penetration and retraction system, including the penetration and retraction device;

the penetration and retreat system also comprises a power transmission device connected with the driver.

The power source of the penetration and retreat device is optimized by the penetration and retreat system, the force application stability in the penetration and retreat process is ensured, and the possibility that the part to be pushed is damaged is reduced.

Preferably, the power transmission device comprises a pipe body and a pump station which are connected in sequence, and the pipe body is also connected with the driver.

The invention has the beneficial effects that:

the penetration and retreat device is used for rapid penetration and retreat between the belt pushing piece and the fixing piece, such as a gate pull rod and a pin shaft, so that the penetration and retreat time is shortened, and the penetration and retreat efficiency is improved; the safety of the operating personnel in the process of penetrating and retreating is ensured, the damage to the pull rod and the pin shaft in the process of penetrating and retreating is avoided, and the service life of the pull rod and the pin shaft is prolonged; the size in centre gripping space is adjusted through the setting of a plurality of stake bodies, and then satisfies wearing of the pull rod of different models and moves back, has increased this application scope who wears to move back the device.

The penetration and retreat system is additionally provided with the power transmission device on the basis of the penetration and retreat device, the power transmission device provides power for the driver, the stability of acting force applied when the penetration and retreat device works is ensured, the penetration and retreat efficiency is ensured, and the damage of a piece to be pushed is reduced.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.

FIG. 1 is a schematic view of a threading and withdrawing device;

FIG. 2 is a top view of the threading and retracting device and the member to be pushed;

FIG. 3 is a schematic view of a partial enlarged structure at A;

FIG. 4 is a schematic view of the engagement between the penetration and retraction device and the member to be pushed from the first perspective;

FIG. 5 is a schematic view of the engagement between the penetration and retraction device and the member to be pushed from the second perspective;

fig. 6 is a schematic structural diagram of a penetration and retreat system.

In the figure: 1-a scaffold; 11-a stent body; 111-a transverse plate; 112-a riser; 113-leg; 12-a connecting assembly; 121-connecting plate; 122-a sliding groove; 123-a linking structure; 13-a clamping space; 2-a pushing device; 21-a push rod; 211-a first stick body; 212-a second rod; 22-a hinge; 23-a driver; 3-a member to be pushed; 4-a power transmission device; 41-a tube body; 42-a pump station; 5-fixing the part.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.

It will be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly adjacent" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.

It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.

In the following description, specific details are provided to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.

Example 1:

as shown in fig. 1 to 5, a penetration and retraction device of the present embodiment is used for penetrating and retracting a to-be-pushed member 3 mounted on a fixed member 5, and the penetration and retraction device includes:

the bracket 1 is connected with the fixing piece 5, and the bracket 1 comprises at least two bracket bodies 11; and

the pushing device 2 is arranged on the bracket 1, and at least part of the pushing device 2 can move relative to the bracket 1, so that the at least part of the pushing device 2 is connected with the part to be pushed 3 until the part to be pushed 3 passes through and retreats from the fixing piece 5;

wherein, the two bracket bodies 11 are connected through the pushing device 2 and rotate by taking the pushing device 2 as a center.

The penetration and retraction device is designed for solving the problem of high penetration and retraction difficulty of the pin shaft, is used for quickly penetrating and retracting the gate pull rod and the pin shaft, shortens the penetration and retraction time and improves the penetration and retraction efficiency; the safety of the operating personnel in the process of penetrating and retreating is ensured, the damage to the pull rod and the pin shaft in the process of penetrating and retreating is avoided, and the service life of the pull rod and the pin shaft is prolonged; the size of the clamping space 13 is adjusted through the arrangement of the plurality of support bodies 11, so that the pull rods of different models can be penetrated and retracted, and the application range of the penetrating and retracting device is widened.

The working process of the threading and retracting device will now be described with reference to the specific structure of the threading and retracting device, for example, the threading and retracting device is used for threading and retracting a gate pull rod and a pin shaft, the to-be-pushed member 3 is a pin shaft, the fixing member 5 is a pull rod, the size of the clamping space 13 is adapted to the size of the current pull rod by adjusting the included angle between the bracket bodies 11, and then the pull rod is placed in the clamping space 13 and the pin shaft is aligned with the pushing device 2.

Pushing equipment 2 moves and with round pin axle butt, and pushing equipment 2 and then applys the effort to the round pin axle, and because round pin axle and pushing equipment 2 are in on the same straight line, has avoided the round pin axle atress on the horizontal direction, has guaranteed that the round pin axle is wearing to move back the in-process and keep at vertical state to mechanical damage that the in-process of knocking from pull rod and round pin axle caused has effectively been avoided.

Preferably, the penetrating and retreating device can also be used for penetrating and retreating other devices, such as a shaft and a bearing, a shaft and a gear and the like.

The process of moving the pushing member 3 through and back will be described with reference to the specific structure of each component of the moving device.

In the specific embodiments provided by the present disclosure, the stent 1 may be configured in any suitable configuration. Alternatively, the bracket body 11 comprises a horizontal plate 111, a vertical plate 112 connected with the horizontal plate 111, and a support leg 113 positioned on the vertical plate 112, wherein the horizontal plate 111 is connected with the pushing device 2;

the adjacent bracket bodies 11 form a clamping space 13 by surrounding a vertical plate 112, and when the pushing part 3 is pushed back, the fixing part 5 is positioned in the clamping space 13 and is abutted against the support leg 113.

Explaining the structure of the bracket 1, wherein the bracket 1 is composed of a plurality of bracket bodies 11, introducing the structure of a single bracket body 11, specifically, arranging a through hole on the transverse plate 111, matching the size of the through hole with the size of the hinged member 22, and arranging a plurality of transverse plates 111 together, wherein the through holes on different transverse plates 111 are coaxially arranged, thereby facilitating the connection of the plurality of bracket bodies 11.

The vertical plate 112 is connected with the transverse plate 111, the vertical plates 112 of the support bodies 11 are mutually matched to further form a clamping space 13, the support bodies 11 clamp the fixing piece 5, the clamping space 13 limits the degree of freedom of the fixing piece 5 in the penetrating and withdrawing process, the fixing piece 5 is prevented from moving in the penetrating and withdrawing process, the possibility that the pushing piece 3 and the fixing piece 5 are damaged by machinery in the penetrating and withdrawing process is reduced, and the pushing piece 3 is completely taken out.

The supporting leg 113 is matched with the vertical plate 112 to limit the degree of freedom of the fixing piece 5, so that the fixing piece 5 is prevented from moving in the penetrating and retreating process, mechanical damage to the pushing piece 3 and the fixing piece 5 is reduced, balance of stress is guaranteed, turnover and damage caused by overall stress unbalance are avoided to treat the pushing piece 3, and the safety of the penetrating and retreating process is improved.

Preferably, a structural form of the bracket body 11 is now given, as an option, one end of the vertical plate 112 is connected with the end of the transverse plate 111, and the other end of the vertical plate 112 is connected with the support leg 113;

the vertical plates 112 are two and are respectively located at two ends of the transverse plate 111.

Now, the structure of the bracket 1 will be described, after the plurality of bracket bodies 11 are connected together by the hinge 22, a single bracket body 11 can rotate around the hinge 22 and adjust the included angle between adjacent bracket bodies 11, thereby achieving the purpose of adjusting the size of the clamping space 13.

In the specific embodiments provided by the present disclosure, the stent 1 may be configured in any suitable configuration. As an option, the bracket 1 further comprises a connecting assembly 12 for adjusting an included angle between the adjacent bracket bodies 11, and the connecting assembly 12 is detachably arranged on the bracket 1.

Now, complement the concrete structure of support 1, wherein, because the activity degree of freedom of stake body 11 lacks the restriction, stake body 11 probably appears wearing under the exogenic action and moves back the in-process pivoted phenomenon, lead to wearing to move back the device atress unbalance, the condition of overturning appears easily, it treats impeller 3 very easily to harm, the event has set up coupling assembling 12 and has been used for restricting the degree of freedom of stake body 11, guarantee stake body 11 and wearing the stability of moving back the in-process, the contained angle between the adjacent stake body 11 is unchangeable promptly, improve the security of wearing the process of moving back, the mechanical damage who treats impeller 3 and mounting 5 and received has been reduced.

Preferably, a structural form of the connecting assembly 12 is now given, and as an option, the connecting assembly 12 includes a connecting plate 121, a sliding groove 122 on the connecting plate 121, and a connecting structure 123 slidably disposed in the sliding groove 122;

one end of the connecting plate 121 is a fixed end fixedly connected with one support body 11, and the other end of the connecting plate 121 is a movable end movably connected with the adjacent support body 11;

the connecting structure 123 passes through the sliding groove 122 to be connected with the bracket body 11.

Now, the use of the connecting assembly 12 will be described with reference to the structural form of the connecting assembly 12, wherein when the included angle between the adjacent bracket bodies 11 needs to be adjusted, the connection relationship between the movable end of the connecting plate 121 and the bracket bodies 11 is released, so that the included angle between the adjacent bracket bodies 11 is in an adjustable state, and then one of the bracket bodies 11 is rotated, taking as an example the bracket body 11 connected to the fixed end of the connecting plate 121 is rotated, the connecting plate 121 moves along with the bracket bodies 11, the connecting structure 123 remains relatively stationary, and the sliding groove 122 on the connecting plate 121 moves, thereby changing the position of the connecting structure 123 in the sliding groove 122, and when the included angle between the adjacent bracket bodies 11 is at a required angle, the connection relationship between the movable end of the connecting plate 121 and the bracket body 11 is fixed, so that the included angle between the adjacent bracket bodies 11 remains unchanged.

For the connection of the movable end of the connecting plate 121 and the support body 11, the connection is realized through the connecting structure 123, specifically, as an option, the connecting structure 123 realizes the connection of the connecting plate 121 and the support body 11 through a bolt connection mode, specifically, the connecting structure 123 includes a bolt, a nut is connected to the bolt, the bolt head is abutted to the support body 11, the distance between the nut and the connecting plate 121 is adjusted by loosening or tightening the nut, and then the clamping force between the nut and the connecting plate 121 is adjusted.

Preferably, the connection structure 123 is a pin connection, a flange connection, or a key connection, which can be detachably connected to connect the connection plate 121 and the support body 11, and is within the protection scope of the present invention.

In the specific embodiments provided by the present disclosure, the pushing device 2 may be configured in any suitable configuration. As an option, the pushing device 2 includes a pushing rod 21 and a hinge 22 connecting the pushing rod 21 and the bracket 1, and a hole body matched with the pushing rod 21 is arranged on the hinge 22.

The use of the pushing device 2 will now be described with reference to the specific structure of the pushing device 2, wherein the pushing device 2 is used for applying an acting force to the to-be-pushed piece 3, so as to shorten the time of the threading and retreating process and improve the threading and retreating efficiency.

Specifically, the push rod 21 directly contacts the member to be pushed 3, thereby applying a force to the member to be pushed 3. The function of the hinge 22 has already been explained in connection with the bracket 1 and will not be described in detail here.

Preferably, a form of construction of the pushing device 2 is now given, as an option, the pushing rod 21 includes a first rod 211 and a second rod 212 detachably connected to the first rod 211, the first rod 211 is slidably disposed in the hole, and the second rod 212 is located below the first rod 211.

Now, the use of the push rod 21 will be described with reference to the specific structure of the push rod 21, wherein there are a plurality of second rod bodies 212, adjacent second rod bodies 212 are detachably connected, and the second rod bodies 212 are used for adjusting the penetration depth by increasing or decreasing, so as to facilitate the penetration and the retraction of fixing members 5 with different sizes.

Preferably, the pushing device 2 further comprises a driver 23, and the driver 23 is fixed on the bracket 1 and connected with the pushing rod 21.

The structure of the pushing device 2 is now supplemented, wherein the driver 23 is connected to the push rod 21 and drives the push rod 21 to move, so that the pushing member 3 to be pushed is pushed in and pushed out. The arrangement of the driver 23 improves the efficiency of the threading and retreating process and enlarges the application range of the threading and retreating device.

More preferably, it is within the scope of the present invention for the drive 23 to be a hydraulic pump, an electric motor, or the like.

Example 2:

in this embodiment, the use of the penetrating and retracting device is described based on embodiment 1, and a penetrating and retracting system using the penetrating and retracting device described in embodiment 1 is further described.

As shown in fig. 1 to 6, a penetration and retraction system of the present embodiment includes the penetration and retraction device;

the penetration and retraction system further comprises a power transmission device 4 connected with the driver 23.

Now, the penetration and retreat system is described, wherein, on the basis of the penetration and retreat device, the power transmission device 4 is added, the power transmission device 4 provides power for the driver 23, the stability of the acting force applied when the penetration and retreat device works is ensured, the penetration and retreat efficiency is ensured, and the damage of the member to be pushed 3 is reduced.

Preferably, a practical solution of the penetration and retraction system will now be described, as an alternative, the power transmission means 4 comprises a tube 41 and a pump station 42 connected in series, the tube 41 being further connected to the drive 23.

The driver 23 is a hydraulic jack, the power transmission device 4 connects the pump station 42 and the hydraulic jack through the pipe body 41, the pump station 42 can provide hydraulic power and pneumatic power with certain pressure and flow, for the penetrating and withdrawing system, the pump station 42 provides hydraulic power, the hydraulic power is transmitted to the hydraulic jack through the pipe body 41, and then the sliding of the push rod 21 and the penetrating and withdrawing of the to-be-pushed piece 3 are realized.

For the pipe body 41, the pipe body 41 is a hose, the hose is convenient to bend and arrange, the requirements of the penetrating and withdrawing system on the use environment are reduced, meanwhile, the hose is convenient to carry, and the transportation requirements are reduced.

More preferably, the actuator 23 is a double-acting hydraulic jack, which is compact and flat in structure and has many applications; the handle is arranged, so that the carrying is convenient; the mounting holes facilitate the fixation, and the baking finish surface has stronger corrosion resistance; all models contain quick connectors and dust caps.

More preferably, the pumping station 42 is an electric hydraulic pump station, and the electric hydraulic pump station can be a gear pump, a vane pump or a plunger pump according to different actual construction conditions.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.

Claims

1. Wear to move back the device for wear to move back and install treating impeller (3) on mounting (5), its characterized in that, wear to move back the device and include:

the bracket (1) is connected with the fixing piece (5), and the bracket (1) comprises at least two bracket bodies (11); and

the pushing device (2) is arranged on the bracket (1), and at least part of the pushing device (2) can move relative to the bracket (1) so that at least part of the pushing device (2) is connected with the to-be-pushed piece (3) and pushes the to-be-pushed piece (3) to penetrate and retreat from the fixing piece (5);

wherein, the bracket bodies (11) are connected with each other through the pushing device (2) and rotate by taking the pushing device (2) as a center.

2. A pull-through device according to claim 1, wherein: the support body (11) comprises a transverse plate (111), a vertical plate (112) connected with the transverse plate (111) and support legs (113) positioned on the vertical plate (112), and the transverse plate (111) is connected with the pushing device (2);

the adjacent support bodies (11) form a clamping space (13) through vertical plates (112), and when the pushing piece (3) is pushed back, the fixing piece (5) is positioned in the clamping space (13) and is abutted against the support leg (113).

3. A pull-through device according to claim 2, wherein: one end of the vertical plate (112) is connected with the end part of the transverse plate (111), and the other end of the vertical plate (112) is connected with the support leg (113);

the vertical plates (112) are two and are respectively positioned at two ends of the transverse plate (111).

4. A pull-through device according to claim 1, wherein: the support (1) further comprises a connecting assembly (12) for adjusting an included angle between adjacent support bodies (11), and the connecting assembly (12) is detachably arranged on the support (1).

5. A pull-through device according to claim 4, wherein: the connecting assembly (12) comprises a connecting plate (121), a sliding groove (122) positioned on the connecting plate (121), and a connecting structure (123) arranged in the sliding groove (122) in a sliding manner;

one end of the connecting plate (121) is a fixed end fixedly connected with one bracket body (11), and the other end of the connecting plate (121) is a movable end movably connected with the adjacent bracket body (11);

the connecting structure (123) penetrates through the sliding groove (122) to be connected with the support body (11).

6. A pull-through device according to claim 1, wherein: the pushing device (2) comprises a pushing rod (21) and a hinge piece (22) connected with the pushing rod (21) and the support (1), and a hole body matched with the pushing rod (21) is formed in the hinge piece (22).

7. A pull-through device according to claim 6, wherein: the push rod (21) comprises a first rod body (211) and a second rod body (212) detachably connected with the first rod body (211), the first rod body (211) is arranged in the hole in a sliding mode, and the second rod body (212) is located below the first rod body (211).

8. A pull-through device according to claim 6, wherein: the pushing device (2) further comprises a driver (23), and the driver (23) is fixed on the support (1) and connected with the pushing rod (21).

9. Wear to move back system, its characterized in that: comprising a pull-through device according to any one of claims 1 to 8;

the penetration and retreat system also comprises a power transmission device (4) connected with the driver (23).

10. The rethreading system of claim 9, wherein: the power transmission device (4) comprises a pipe body (41) and a pump station (42) which are connected in sequence, and the pipe body (41) is also connected with the driver (23).