CN113279717A

CN113279717A - Drill bit fishing device capable of simply grasping and lifting rear lever

Info

Publication number: CN113279717A
Application number: CN202110572845.8A
Authority: CN
Inventors: 周梦娇
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-08-20

Abstract

The invention discloses a drill bit fishing device capable of simply grasping and lifting a rear lever, which comprises a supporting plate, wherein a first lifting rope is connected to the middle position of the top of the supporting plate, a fishing plate is arranged in parallel under the supporting plate, a pair of connecting plates which are arranged in parallel are vertically welded between the fishing plate and the supporting plate, and a movable gap is formed between the connecting plates at two sides. According to the invention, the first guide fixing rod and the second guide fixing rod are respectively arranged between the two sides of the fixing sleeve at the two ends, and the lever is hinged to the bottom end of the fixing sleeve, so that on one hand, the first guide fixing rod and the second guide fixing rod can lock the fixing sleeve after clamping a drill bit, and avoid slipping in the fishing and pulling process, on the other hand, the guide wheel can provide an effect of gathering the lever inwards, so that the lever pulling is prevented from influencing the clamping of the fixing sleeve, and a part of tightening effect of the fixing sleeve can be provided, so that the double clamping and fixing effect generated by matching with the fixing sleeve is better in stability and is not easy to slip.

Description

Drill bit fishing device capable of simply grasping and lifting rear lever

Technical Field

The invention relates to the technical field of building construction, in particular to a drill bit fishing device with a simple grabbing back lever lifting function.

Background

During the drilling process of the cast-in-situ bored pile, accidents such as separation of a drill bit from a drill rod and breakage of a drill rod body occur occasionally, and the drill bit falls to the bottom of a hole. In case the condition that the drill bit drops appears, must in time salvage out the drill bit, otherwise the pore wall opens for a long time and leads to the pore wall to collapse easily, probably causes the drill bit to take out and scrap on the one hand, and on the other hand still needs to take other complicated technical measure and continues the drilling construction, can cause the pile foundation to scrap and change the design even when serious, not only delays the time limit for a project, also can lead to huge economic loss.

At present, current drill bit salvage mode roughly divide into machinery and salvage and artifical salvage two kinds, and artifical salvage needs rely on the manual work to dive and carry out after the degree of depth of drill bit whereabouts that steel wire rope's bundle fix after with the drill bit salvage the drill bit through the haulage equipment on ground, but the pore wall opens for a long time and leads to the pore wall to collapse easily, and artifical salvage danger factor is great, so some salvage place select for use mechanical device to salvage.

At present, most of the existing mechanical fishing devices drag and submerge a mechanically driven fishing head to the depth of falling of a drill bit for fishing, the fixed lifting mode of fishing is mainly to grab and fix or look for a protrusion part and a recess part which are beneficial to the top end of the drill bit for fixing the fishing head, the aim is to firmly fix the fishing head with the drill bit and then drag and fish the fishing head upwards, however, the position and shape of the drill bit after falling off the inside of the drill hole are uncertain, the fracture depth and position are difficult to judge when the drill bit falls off, the fishing head driven by a machine is difficult to find a suitable position capable of stably grasping, the fishing head is vertically pulled upwards after being fixedly grasped, and a large amount of particles such as silt exist at the holding part, so that the locking effect of holding and fixing is easily influenced, even if the drill bit is grabbed, the risk of secondary falling is easily caused, and therefore the drill bit fishing device which is convenient and easy to grab and lift by utilizing the lever is provided.

Disclosure of Invention

The invention aims to provide a drill bit fishing device with a simple grabbing back lever lifting function, and aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a drill bit fishing device capable of simply grasping and lifting a rear lever comprises a supporting plate, wherein a first lifting rope is connected to the middle position of the top of the supporting plate, fishing plates are arranged in parallel under the supporting plate, a pair of connecting plates which are arranged in parallel are perpendicularly welded between the fishing plates and the supporting plate, movable gaps are formed between the connecting plates on two sides, movable grooves are formed in the edge positions of two sides of the outer side wall of each fishing plate, grabbing rods are hinged to the tops of the fishing plates at the positions of the movable grooves on two sides, the grabbing rods are symmetrically arranged in an arc-shaped opposite direction, the tops of the grabbing rods penetrate through the movable gaps and are arranged in a staggered mode, the bottoms of the grabbing rods extend to the lower portion of the fishing plates and are hinged to fixing sleeves, driving assemblies for driving the grabbing rods on two sides to grab and release the grabbing rods are arranged on the fishing plates, and the fixing sleeves are in an arc-shaped plate shape, the inboard intermediate position department of fixed cover lateral wall all is equipped with the recess, the recess is on a parallel with the extending direction of fixed cover and arranges, and the both ends of recess extend to the terminal surface position department of fixed cover respectively, fixed cover bottom in the same vertical plane of recess articulates there is the lever, the both ends that the lever is close to the articulated shaft position are ">" form and arrange, the one end of lever extends to fixed cover inside and with recess looks adaptation, the other end of lever extends to fixed cover outside and is connected with lift rope two, the bilateral symmetry of backup pad lateral wall has a pair of mounting groove that supplies lift rope two to wear to establish the use, two the inboard of mounting groove all installs a pair of leading wheel of mutually supporting through the bearing, and two one end of keeping away from the lever of both sides lift rope are alternates respectively between the leading wheel of both sides and are upwards drawn and arrange, all outside welding has the direction dead lever about the fixed cover both sides lateral wall position department of salvage board bottom one end all perpendicularly The fishing plate comprises a fishing plate body, a fishing plate body and a fishing plate body, wherein the fishing plate body is provided with two fixing rods, the two fixing rods are arranged on the two fixing rods, and the two fixing rods are arranged on the two fixing rods.

Preferably, the horizontal distance between the guide wheel and the vertical plane of the center point of the support plate is smaller than the horizontal distance between the end point of the other end of the lever and the vertical plane of the center point of the support plate when one end of the lever is attached to the inner side of the groove in the holding state.

Preferably, the drive assembly includes that slidable mounting is in the lift cover at clearance position, be equipped with the slide rail that supplies the lift cover to go up and down to use on the connecting plate, the inside level of slide rail arrange with grab the spacing axle of pole looks adaptation, spacing axle runs through both sides perpendicularly and grabs the pole and arranges, the top of grabbing the pole is equipped with and supplies spacing axle to wear to establish the logical groove that the back slided and uses, hydraulic cylinder one is all installed to salvage board top both sides of lift cover below, and the output of hydraulic cylinder one is connected with the lift cover.

Preferably, the locking assembly comprises a second hydraulic cylinder which is parallel to the second guiding fixing rod and is arranged on the outer side of the sliding seat, and a connecting rod is hinged between the output end of the second hydraulic cylinder and the second guiding fixing rod which is positioned on the same side and is arranged above and below the second hydraulic cylinder.

Preferably, the inner sides of the fixed sleeves outside the grooves are provided with anti-skid teeth at equal intervals from top to bottom.

Preferably, the bottom end of the grabbing rod is provided with a connecting groove for mounting and movably using the hinge shaft of the fixing sleeve, and the hinge position of the fixing sleeve and the grabbing rod is located at the middle upper position in the middle vertical plane of the outer side wall of the fixing sleeve.

Preferably, two that lie in same one side that two outside walls of guide fixing pole kept away from each other all is the inclined plane form of symmetrical arrangement, two the incline direction of outside wall of guide fixing pole all outwards expands by fixed cover one side and arranges, and lie in two that lie in same one side that an outside wall of guide fixing pole is close to each other all is the inclined plane form with guide fixing pole looks adaptation.

Compared with the prior art, the invention has the beneficial effects that:

1: the invention arranges the grabbing rods into a circular arc shape, the top end of the outer side wall of the fixed sleeve is hinged at the bottom end of the grabbing rods, the grabbing rods are arranged in a circular arc shape, the driving assembly for driving the grabbing rods at two sides to gather or unfold is arranged at the position above the hinged shaft of the grabbing rods and the fishing plate, the pulling force applied in the grabbing rod lifting process is borne by the hinged shaft part, the stress influence on the driving assembly is avoided, the grabbing and fixing stability is improved, the fixed sleeve at the bottom end of the grabbing rod is in an unfolded state, because the hinged shaft is close to the middle upper part, the fixed sleeves at two sides can droop outwards from the weight, the large bottom end space and the small top end space of the splayed shape are kept to be clamped, the levers on the fixed sleeves at two sides can form the guiding and judging bit position function of the large bottom end space and the small top end space of the splayed shape on the inner side of the fixed sleeve under the clamping state by the traction of the lifting rope II, for example, the lifting rope II is continuously and repeatedly pulled and loosened in the grabbing process, the one end that drives the lever and extend to fixed cover inboard strikes the drill bit outer wall to can judge the position of drill bit under water, be favorable to fixing the outside of locating the drill bit with grabbing pole and fixed cover smoothly cover.

2: according to the invention, the first guide fixing rod and the second guide fixing rod are respectively arranged between the two sides of the fixing sleeve at the two ends, and the lever is hinged at the bottom end of the fixing sleeve, so that on one hand, the first guide fixing rod and the second guide fixing rod can lock the fixing sleeve after clamping a drill bit, and avoid slipping in the fishing and pulling process, on the other hand, the lever not only plays a role in guiding and judging before grasping, but also can provide upward traction force by utilizing the lever in the fishing and pulling process, the guide wheel used in the lever pulling can also provide an effect of gathering the lever inwards, so that the lever pulling is prevented from influencing the clamping of the fixing sleeve, and a part of tightening effect of the fixing sleeve can be provided, and the double clamping and fixing effect generated by matching with the fixing sleeve is better in stability and is not easy to slip.

Drawings

FIG. 1 is a schematic view of the internal structure of the fishing and gripping device of the present invention in elevation;

FIG. 2 is a schematic view of the front view of the internal structure of the fishing and submerging device of the present invention;

FIG. 3 is a schematic view of an enlarged interior of the fishing plate of the present invention in elevation;

fig. 4 is a schematic top view of the fixing cover of the present invention;

fig. 5 is a schematic diagram of the structure of two sides of the guiding fixing rod of the present invention.

In the figure: 1. a support plate; 2. salvaging a plate; 3. a second lifting rope; 4. a first lifting rope; 5. a slide rail; 6. a clearance for movement; 7. a limiting shaft; 8. a guide wheel; 9. a first hydraulic cylinder; 10. a grab bar; 11. a lever; 12. connecting grooves; 13. anti-slip teeth; 14. a second guide fixing rod; 15. a first guide fixing rod; 16. fixing a sleeve; 17. a movable groove; 18. a connecting plate; 19. a through groove; 20. a lifting sleeve; 21. mounting grooves; 22. a connecting rod; 23. a slide base; 24. a second hydraulic cylinder; 25. and (4) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, an embodiment of the present invention is shown: a drill bit fishing device capable of simply grasping and lifting a rear lever comprises a supporting plate 1, wherein the supporting plate 1 is a circular plate, a lifting rope I4 is connected to the middle position of the top of the supporting plate 1, the lifting rope I4 is driven by a ground traction mechanism such as a winch to lift, a fishing plate 2 is arranged in parallel under the supporting plate 1, a pair of connecting plates 18 which are arranged in parallel are vertically welded between the fishing plate 2 and the supporting plate 1, the fishing plate 2 is also a circular plate, the two connecting plates 18 are symmetrically arranged on the axis of the fishing plate 2, a movable gap 6 is formed between the connecting plates 18 at two sides, movable grooves 17 are arranged at the edge positions of two sides of the outer side wall of the fishing plate 2, grabbing rods 10 are hinged to the tops of the fishing plates 2 at the positions of the movable grooves 17 at two sides, the movable grooves 17 are used for the grabbing rods 10 to move when turning over, the two grabbing rods 10 are symmetrically arranged in an arc shape, the tops of the two grabbing rods 10 penetrate through the movable gaps 6 and are arranged in a staggered mode, the bottom ends of the two grabbing rods 10 extend to the lower part of the salvaging plate 2 and are hinged with a fixing sleeve 16, the upper part and the lower part of a hinged shaft of the grabbing rods 10 form a structure similar to a seesaw, a driving component for driving the grabbing rods 10 at two sides to grasp and loosen for use is arranged on the salvaging plate 2, the top ends of the grabbing rods 10 are driven to overturn by the driving component to realize the grasping or loosening action of the bottom ends of the grabbing rods 10, so that the grabbing rods 10 and a drill bit are clamped and fixed, the fixing sleeve 16 is arc-shaped plate-shaped, grooves 25 are arranged at the middle positions of the inner side of the outer side wall of the fixing sleeve 16, the grooves 15 are arranged in parallel to the extending direction of the fixing sleeve 16, the two ends of the grooves 15 respectively extend to the upper end face position and the lower end face position of the fixing sleeve 16, the shape of the fixing sleeve 16 is consistent with the shape of the outer side wall of the top end of the drill bit, the radian of the fixing sleeve 16 is semicircular arc or minor arc, and the bottom of the fixing sleeve 16 in the same vertical plane of the grooves 15 is hinged with a lever 11, the two ends of the lever 11 close to the hinge shaft are arranged in a '>' shape, one end of the lever 11 extends into the fixing sleeve 16 and is matched with the groove 25, the lever can be completely turned over and then is hidden in the groove 25, the other end of the lever 11 extends to the outer side of the fixing sleeve 16 and is connected with the lifting rope II 3, the lifting rope II 3 can drive one end of the lever 11 hidden in the groove 25 to be turned inwards to be turned out of the groove 25 to abut against the side wall of the drill bit clamped at the inner side of the fixing sleeve 16 after being pulled and stretched, therefore, in actual use, the lever 11 can stably and pryingly clamp and fix the drill bit no matter whether the fixing sleeve 16 is completely attached to the outer wall of the drill bit to clamp or not, only two supporting points supported on the side wall of the drill bit are required to be fixed, the fixing sleeve 16 cannot be turned over between the two points, and support the fixing of the lever 11, thereby greatly improving the clamping success rate of the underwater drill bit, the larger the gravity of the drill bit is, the stronger the clamping fixing force generated by prying, but the better the fishing effect generated by completely wrapping the fixed sleeve 16 on the outer side wall at the top end of the drill bit in a normal clamping state, so the fixed sleeve 16 is completely attached to the drill bit to be fixed before fishing and clamping as much as possible, a pair of mounting grooves 21 for the penetration of the second lifting rope 3 are symmetrically arranged at two sides of the outer side wall of the support plate 1, a pair of guide wheels 8 which are mutually matched are arranged at the inner sides of the two mounting grooves 21 through bearings, one ends of the second lifting ropes 3 at two sides, far away from the lever 11, are respectively penetrated between the guide wheels 8 at two sides and are upwards drawn and arranged, the second lifting rope 3 is drawn by a ground winch, the guide fixing rods one 15 are perpendicularly welded outwards at the upper and lower positions of the outer side walls at two sides of the fixed sleeve 16 at one end of the bottom of the fishing plate 2, the upper and lower positions of the outer side walls of the two sides of the fixed sleeve 16 at the other end of the bottom of the salvaging plate 2 are vertically and outwards connected with a second guiding fixing rod 14 in a sliding manner, the outer side walls of the two sides of the fixed sleeve 16 at the position of the second guiding fixing rod 14 are respectively provided with a sliding seat 23 used for installing the second guiding fixing rod 14, one end of the second guiding fixing rod 14 is provided with a sliding block matched with the sliding seat 23, the second guiding fixing rod 14 can expand or contract in a first guiding fixing rod 15, the sliding seats 23 at the two sides are respectively provided with a locking component used for driving the second guiding fixing rod 14 to move along opposite directions, the locking component can drive the second guiding fixing rod 14 to expand or contract in the first guiding fixing rod 15, the encircling effect generated by the fixed sleeve 16 due to the abutting of the second guiding fixing rod 14 and the first guiding fixing rod 15 during expansion is used for locking, and the lever 11 is prevented from being displaced during prying and lifting, when the size is reduced, the fixed sleeves 16 between the two side grab bars 1 are conveniently sleeved and matched.

In this embodiment, the horizontal distance between the guide wheel 8 and the vertical plane of the central point of the support plate 1 is smaller than the horizontal distance between the end of the other end of the lever 11 and the vertical plane of the central point of the support plate 1 when one end of the lever 11 is attached to the inner side of the groove 25 in the grasping state, and the purpose is to draw the guide wheel 8 to the axis position of the support plate 1 as much as possible, because the guide wheel 8 is used for drawing and guiding the lifting rope two 3, the guide wheel 8 can generate a larger turning movement amount of the lever 11 by drawing after being drawn together, so as to realize a larger range during prying and clamping, and the guide wheel 8 is inwardly drawn and arranged to drive the lever 11 to be located at one end of the outer side of the fixing sleeve 16 to be drawn together to the axis position of the support plate 1, so as to wrap the fixing sleeve 16 for drawing, so as to avoid the interference effect of clamping the fixing sleeve 16, and improve the clamping stability of the fixing sleeve 16.

In this embodiment, drive assembly includes slidable mounting in the lifting sleeve 20 at the 6 positions in movable gap, be equipped with on the connecting plate 18 and supply the lifting sleeve 20 to go up and down slide rail 5 of use, can adopt the pulley mode to slide between lifting sleeve 20 and the slide rail 5, the effect of just meeting centre gripping is risen to cooperation lifting sleeve 20, reduce the influence of submarine silt, slide rail 5's inside level is arranged and is grabbed spacing axle 7 of pole 10 looks adaptation with grabbing, spacing axle 7 runs through both sides grab bar 10 perpendicularly and arranges, the top of grabbing bar 10 is equipped with and supplies spacing axle 7 to wear to establish the logical groove 19 of back sliding use, spacing axle 7 rises inside logical groove 19 and drives grab bar 10 top and outwards expand, the bottom drives fixed cover 16 and contracts and realizes the centre gripping, pneumatic cylinder 9 is all installed to 2 top both sides of salvage board of lifting sleeve 20 below, and the output of pneumatic cylinder 9 is connected with lifting sleeve 20.

In this embodiment, the locking assembly includes a second hydraulic cylinder 24 parallel to the second guiding fixing rod 14 and mounted on the outer side of the sliding base 23, and a connecting rod 22 is hinged between the output end of the second hydraulic cylinder 24 and the second guiding fixing rod 14 located on the same side and located above and below the same side, the second hydraulic cylinder 24 and the first hydraulic cylinder 9 are simultaneously subjected to the hydraulic action of the ground hydraulic pump to achieve expansion, and the second hydraulic cylinder 24 expands to drive the second guiding fixing rod 14 to stretch and gather or push and expand for locking.

In this embodiment, the anti-slip teeth 13 are arranged on the inner side of the fixing sleeve 16 outside the groove 25 at equal intervals from top to bottom, so as to increase the stability of the fixing sleeve 16 after clamping the drill bit and reduce the slip effect of silt.

In this embodiment, the bottom end of the grab bar 10 is provided with a connecting groove 12 for the fixed sleeve 16 to be mounted and movably used by a hinge shaft, the hinge position of the fixed sleeve 16 and the grab bar 10 is located at the middle upper position in the middle vertical plane of the outer side wall of the fixed sleeve 16, because the fixed sleeve 16 is mounted only through the hinge shaft, the fixed sleeve 16 can receive the self weight in the sinking process to cause the top end to be light and the bottom end to be heavy, the fixed sleeves 16 at the two ends are arranged in a shape like the Chinese character 'ba' when not clamped to be conveniently sleeved outside the drill bit, and can be conveniently adjusted according to the shape of the outer wall of the clamping part of the drill bit, the effect of two-point support or complete-fit back support with the drill bit can be realized in various modes, the angle of the fixed sleeve 16 can be outwards expanded and adjusted in an angle after being pulled by the lever 11 and the lifting rope two 3, and the clamping can be maintained in a symmetrical mode as much as possible.

In this embodiment, the one side that two 14 lateral walls of direction dead lever that lie in same one side keep away from each other all is the inclined plane form of symmetrical arrangement, the incline direction of two 14 lateral walls of direction dead lever all is arranged by fixed cover 16 one side outwards expansion, and lie in one side that two 15 lateral walls of direction dead lever that lie in same one side are close to each other all be with the inclined plane form of two 14 looks adaptations of direction dead lever, utilize the inclined plane form of looks adaptation about the lateral wall laminate, utilize the inclined plane direction to carry out the effect of one-way locking after the centre gripping locking, locking moves back.

The working principle is as follows: when the drill bit needs to be salvaged, the hydraulic cylinder I9 is in a contracted state, the grabbing rods 10 on the two sides are kept to be unfolded, the guide fixing rods II 14 are contracted by the hydraulic cylinder II 24 to be driven to form an overlapped state, the device is integrally sunk into a drill hole by utilizing the traction of the lifting rope I4, the grabbing rods 10 are unfolded and can smoothly extend downwards from the two sides of the drill bit along the hole wall of the drill hole, the horizontally arranged salvaging plate 2 explores the top end of the drill bit, the bottom end of the salvaging plate 2 props against the top end of the drill bit when the salvaging plate is settled to the depth of the drill bit, the hydraulic pump can be used for driving the hydraulic cylinder I9 to extend, the hydraulic cylinder I9 extends to drive the bottom ends of the grabbing rods 10 on the two sides to inwards gather and grab, the salvaging plate 2 is integrally regulated along with the position to be clamped and fixed at the top end of the drill bit due to the fact that the fixing sleeve 16 is arc-shaped, the guide fixing rods I15 and the guide fixing sleeve 14 on the two sides are in an outwards expanded state to play a role in guiding, after the first hydraulic cylinder 9 is stretched and fixed, the fixing sleeve 16 is fixed on the outer side of the top end of the drill bit, at the moment, the second hydraulic cylinder 24 is stretched to drive the second guiding fixing rod 24 to expand to be abutted against the first guiding fixing rods 15 on the two sides for locking, the inclined-plane-shaped side walls between the first guiding fixing rods 15 and the second guiding fixing rods 24 are used for anti-skidding fixing, after the fixing, the second lifting rope 3 is used for drawing one end of the outer side of the lever 11, the inner end of the sleeve is turned out from the groove 25 inside the fixing sleeve 16 to interfere with the outer wall of the drill bit, while the fixed sleeve 16 is clamped by the first hydraulic cylinder 9 on one hand and the first guide fixing rod 15 and the second guide fixing rod 24 on the other hand, the traction force of the second lifting rope 3 only can generate the clamping force of the lever 11 on the drill bit, and the fixed sleeve 16 is not easy to be separated, and the drill bit is pulled upwards by matching with the lifting rope I4, so that the water surface fishing operation of the drill bit can be completed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The utility model provides a bit fishing device that back lever promoted is simply grabbed, its characterized in that: the fishing plate comprises a supporting plate (1), a first lifting rope (4) is connected to the middle position of the top of the supporting plate (1), fishing plates (2) are arranged in parallel under the supporting plate (1), a pair of connecting plates (18) which are arranged in parallel are perpendicularly welded between each fishing plate (2) and the supporting plate (1), movable gaps (6) are formed between the connecting plates (18) on two sides, movable grooves (17) are arranged at the edge positions of two sides of the outer side wall of each fishing plate (2), grabbing rods (10) are hinged to the tops of the fishing plates (2) on the positions of the movable grooves (17) on two sides, the grabbing rods (10) are symmetrically arranged in opposite arc shapes, the tops of the grabbing rods (10) penetrate through the movable gaps (6) and are arranged in a staggered mode, the bottoms of the grabbing rods (10) extend to the lower side of the fishing plate (2) and are hinged to a fixing sleeve (16), and be equipped with on salvage board (2) and be used for driving both sides grab bar (10) and grasp and relax the drive assembly who uses, fixed cover (16) are the arc platelike, the inboard intermediate position department of fixed cover (16) lateral wall all is equipped with recess (25), recess (15) are on a parallel with the extending direction of fixed cover (16) and arrange, and the both ends of recess (15) extend to the terminal surface position department of fixed cover (16) respectively, fixed cover (16) bottom in the same vertical plane of recess (15) articulates there is lever (11), the both ends that lever (11) are close to the articulated shaft position are "the form and arrange, the one end of lever (11) extends to fixed cover (16) inside and with recess (25) looks adaptation, the other end of lever (11) extends to fixed cover (16) outside and is connected with lift rope two (3), the bilateral symmetry of backup pad (1) lateral wall has been arranged a pair of confession lift rope two (3) and has worn to establish the ann's drive assembly who uses The fishing device comprises a mounting groove (21), a pair of guide wheels (8) which are matched with each other are mounted on the inner sides of the two mounting grooves (21) through bearings, one ends, far away from levers (11), of two lifting ropes (3) on the two sides are respectively inserted between the guide wheels (8) on the two sides and are arranged in an upward traction manner, a first guide fixing rod (15) is perpendicularly welded outwards at the upper and lower positions of the outer side walls on the two sides of a fixing sleeve (16) at one end of the bottom of a fishing plate (2), a second guide fixing rod (14) is perpendicularly and outwards slidably connected with the upper and lower positions of the outer side walls on the two sides of the fixing sleeve (16) at the other end of the bottom of the fishing plate (2), sliding seats (23) used for mounting the second guide fixing rod (14) are arranged on the outer side walls on the two sides of the fixing sleeve (16) at the position of the second guide fixing rod (14), and sliding blocks matched with the sliding seats (23) are arranged at one ends of the second guide fixing rod (14), and the sliding seats (23) at the two sides are provided with locking components for driving the upper and lower guide fixing rods (14) to move along opposite directions.

2. The simple grip rear lever lifting bit fishing device according to claim 1, wherein: the horizontal distance between the guide wheel (8) and the vertical plane of the center point of the support plate (1) is smaller than the horizontal distance between the end point of the other end of the lever (11) and the vertical plane of the center point of the support plate (1) when one end of the lever is attached to the inner side of the groove (25) in a holding state.

3. The simple grip rear lever lifting bit fishing device according to claim 1, wherein: the drive assembly includes that slidable mounting is in lift cover (20) at clearance (6) position, be equipped with on connecting plate (18) and supply lift cover (20) to go up and down slide rail (5) of using, the inside level of slide rail (5) is arranged and is grabbed spacing axle (7) of pole (10) looks adaptation, spacing axle (7) run through both sides perpendicularly and grab pole (10) and arrange, the top of grabbing pole (10) is equipped with and supplies spacing axle (7) to wear to establish logical groove (19) that the back slided and use, hydraulic cylinder (9) are all installed to salvage board (2) top both sides of lift cover (20) below, and the output of hydraulic cylinder (9) is connected with lift cover (20).

4. The simple grip rear lever lifting bit fishing device according to claim 1, wherein: the locking assembly comprises a second hydraulic cylinder (24) which is parallel to the second guiding fixing rod (14) and is arranged on the outer side of the sliding seat (23), and connecting rods (22) are hinged between the output end of the second hydraulic cylinder (24) and the second guiding fixing rod (14) which is positioned on the same side and is arranged above and below.

5. The simple grip rear lever lifting bit fishing device according to claim 1, wherein: the inner sides of the fixed sleeves (16) on the outer sides of the grooves (25) are provided with anti-skidding teeth (13) at equal intervals from top to bottom.

6. The simple grip rear lever lifting bit fishing device according to claim 1, wherein: the bottom of the grabbing rod (10) is provided with a connecting groove (12) for mounting and movably using a hinge shaft of the fixing sleeve (16), and the hinged position of the fixing sleeve (16) and the grabbing rod (10) is located at the middle upper position in the vertical plane in the middle of the outer side wall of the fixing sleeve (16).

7. The simple grip rear lever lifting bit fishing device according to claim 1, wherein: the two sides, located the same side, of the outer side walls of the second guiding fixing rods (14) are both in the shape of inclined planes which are symmetrically arranged, the two inclined directions of the outer side walls of the second guiding fixing rods (14) are both outwards expanded from one side of the fixing sleeve (16), and the two sides, located the same side, of the outer side walls of the first guiding fixing rods (15) are both in the shape of inclined planes matched with the second guiding fixing rods (14).