CN111682480A

CN111682480A - Self-locking strain clamp

Info

Publication number: CN111682480A
Application number: CN202010548796.XA
Authority: CN
Inventors: 李淑军
Original assignee: 李淑军
Current assignee: Jiangsu Jiangdong Power Equipment Co.,Ltd.
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-09-18
Anticipated expiration: 2040-06-16
Also published as: CN111682480B

Abstract

The invention relates to the technical field of strain clamps and discloses a self-locking strain clamp, wherein an outer circle wall surface of a limiting block is provided with an air hole which is a circular through hole, the air hole is clamped with a blocking block, five inner wall surfaces of a pentagon through part of an air bag are fixedly provided with scrapers which are in a rectangular structure, one side wall surface of each of the five scrapers close to each other is fixedly provided with a scraping block, each scraping block is a hollow rectangular pyramid, one side wall surface of each scraping block far away from the corresponding scraper is open, the scrapers can float along with the amount of the air in the air bag, the limiting block and an extension frame are clamped together by inserting a cable into the extension frame for fixing, a spring extrudes a connecting rod, the clamping block is pushed into a side hole by the spring, the connecting rod is clamped with a butt groove through the side hole, when the extension frame is disassembled, a motor is started, and a shaft of, the main ratchet wheel can drive the chain to rotate, and the chain rotates to drive the auxiliary ratchet wheel to rotate.

Description

Self-locking strain clamp

Technical Field

The invention relates to the technical field of strain clamps, in particular to a self-locking strain clamp.

Background

The strain clamp is a hardware fitting used for fixing a lead to bear the tension of the lead and hanging the lead to a strain insulator-string group or a tower;

when the strain clamp is used actually, the strain clamp is divided into a fixed type and a separated type, the separated type strain clamp is detachable when being used actually, but the adjusting part of the detachable strain clamp is exposed outside, so that the parts are extremely easy to corrode in a severe environment outside, the strain clamp adjusting part cannot be used, and a self-locking type strain clamp is needed for the purpose.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a self-locking strain clamp which has the advantages of preventing an adjusting part from being corroded and the like, and solves the problem that the traditional external adjusting part is easy to corrode.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a self-locking strain clamp comprises a fixed block, wherein the fixed block is of a rectangular structure, the fixed block is fixedly installed on external electric tower equipment, a fixed hole is formed in the front wall surface of the fixed block, the fixed hole is a pentagonal groove, an extension frame is arranged in the fixed hole and is of a hollow pentagonal prism structure, the front side wall surface and the rear side wall surface of the extension frame are both open, the extension frame is clamped with the fixed hole, a side hole is formed in the right wall surface of the extension frame and is a circular through hole, the number of the side holes is two, a puncture-proof groove is formed in the front wall surface of the extension frame and is an annular groove, the puncture-proof groove is communicated with the opening of the front wall surface of the extension frame, a top hole is formed in the upper wall surface of the fixed block and is a rectangular groove, a front groove is a rectangular groove which is communicated with the top hole, a low block is fixedly installed on the inner rear wall surface of the top hole and is, the inner rear wall surface of the top hole is fixedly provided with a high block, the upper wall surface of the low block is fixedly provided with a tension spring, the top hole is internally provided with a clamping block, the rear wall surface of the clamping block is fixedly provided with a clamping piece, the clamping piece is an integral body formed by two integrally-formed plates, one plate of the clamping piece is rectangular, the other plate of the clamping piece is S-shaped, the front groove is internally provided with a sliding block which is of an L-shaped structure, the sliding block is clamped with the front groove, the upper wall surface of the sliding block is provided with a clamping groove which is an S-shaped groove, the clamping groove is connected with a plate at the lower end of the clamping piece, the upper wall surface of the sliding block is fixedly provided with a motor, two motor motors are arranged, the outer circle wall surface of a shaft of the motor is fixedly provided with a main ratchet wheel, the inner left wall surface of the front groove, an inner groove is formed in the left wall surface of the connecting groove, the inner groove is a rectangular groove, a rotating groove is formed in the rear wall surface of the inner groove, the rotating groove is a T-shaped groove, the position of the rotating groove is the same as the axial position of the rope groove, a rotating shaft is arranged in the rotating groove, supporting rods are fixedly mounted on the outer circle wall surface of the rotating shaft and are in a strip shape, five rotating grooves are formed in each rotating groove, an auxiliary ratchet wheel is arranged in each inner groove, the inner circle wall surface of each auxiliary ratchet wheel is fixedly mounted with one end wall surface of each supporting rod away from the rotating shaft, a chain is arranged on each auxiliary ratchet wheel, a rope groove is formed in the right wall surface of the inner groove, each rope groove is an arc-shaped groove, a combining groove is formed in the upper wall surface of the inner groove and is a circular groove, the combining groove is communicated with the inner groove, the fixing hole and the rope groove, a spring is, be the circular recess to the groove, there are two to the groove, two correspond with two joint groove positions respectively to the groove position, fixed mounting has the combination pole on the left wall of spring, the right wall fixed mounting of combination pole has the rope, be provided with the stopper on the extension frame, the stopper is hollow cylindrical structure, the antetheca face of stopper has been seted up and has been scraped the groove, the movable groove has been seted up to the inside interior round wall of stopper, the movable groove is annular through-hole, the inside of stopper is provided with the gasbag, it has the jam piece to peg graft in the gas port on the gasbag, the jam piece is cylindrical structure, set up the gas pocket on the excircle wall of stopper, the gas pocket is circular through-hole, the gas pocket is in the same place with jam piece joint, equal fixed mounting has the scraper blade on five internal faces of pentagon through-plate part of gasbag, the scraper blade is.

Preferably, the combination rod is of a cylindrical structure, the combination rod is clamped with the combination groove, the combination rod is clamped with the butt groove, the positions of the two butt grooves correspond to the side holes, and the two combination rods are respectively clamped with the two side holes.

Preferably, the rope is sleeved with the spring, and the other end of the rope penetrates through the rope groove and the inner groove to be fixedly installed with the outer circle wall surface of the combination rod.

Preferably, the joint piece is L type structure, and the upper end and the apical pore joint of joint piece are in the same place, and the upper end rectangular block of joint piece and extension spring welding are in the same place, and the lower wall of joint piece and the inside lower wall laminating of preceding groove are in the same place, and the lower wall laminating of the upper end rectangular structure of joint piece is in the same place with the upper wall laminating of high piece.

Preferably, the high block is in a rectangular structure, the high block is positioned above the low block, and the length of the high block is half of that of the low block.

Preferably, the rotating shaft is of a special-shaped column structure, the cross section of the rotating shaft is T-shaped, and the rotating shaft is connected with the rotating groove in a clamping mode.

Preferably, the chain is connected with the auxiliary ratchet wheel and the main ratchet wheel simultaneously.

Preferably, the gasbag is hollow circular structure, and the central through part of gasbag is the pentagon, and the gasbag is in the same place with the inside joint of stopper, is provided with the gas port on the gasbag.

Preferably, the scraping block is a hollow rectangular pyramid, and the wall surface of one side of the scraping block, which is far away from the scraping plate, is open.

Preferably, the scraping groove is a pentagonal through hole and is clamped with the extension frame.

(III) advantageous effects

Compared with the prior art, the invention provides a self-locking strain clamp, which has the following beneficial effects:

1. the self-locking tension-resistant cable clamp is characterized in that a cable is fixedly inserted into an extension frame, a limiting block is clamped with the extension frame, a spring extrudes a combination rod, a clamping block is pushed into a side hole by the spring, the combination rod is clamped with a butt groove through a side hole, when the extension frame is disassembled, a motor is started, a shaft of the motor rotates to drive a main ratchet wheel to rotate, the main ratchet wheel can drive a chain to rotate, the chain rotates to drive an auxiliary ratchet wheel to rotate, the auxiliary ratchet wheel rotates to drive a rotating shaft to rotate, the rotating shaft rotates to drive a rope to rotate, the rope is wound on the rotating shaft, the rope pulls the combination rod to move rightwards, so that the combination rod is separated from the side hole, the clamping block is pulled upwards, lubricating oil is led into a sliding block from the top hole, the sliding block enters the sliding block, the lubricating oil lubricates a rotating part connected with the rotating part, the joint piece drives fastener and block groove joint together, through taking out the jam piece, to the inside gas that blasts of gasbag, the gasbag inflation drives the scraper blade and extrudees to five outer wall faces of extending the frame, and the back-and-forth movement stopper, stopper are at the outside back-and-forth movement that extends the frame, and the outside rust that the scraping piece will extend the frame is scraped out. Compared with the traditional equipment, the equipment has a built-in self-locking structure, the condition that the adjusting part is exposed outside is avoided, the condition that the adjusting part is corroded is avoided, and the service life of the equipment is prolonged.

2. The self-locking tension-resistant cable clamp is characterized in that a cable is fixedly inserted into an extension frame, a limiting block is clamped with the extension frame, a spring extrudes a combination rod, a clamping block is pushed into a side hole by the spring, the combination rod is clamped with a butt groove through a side hole, when the extension frame is disassembled, a motor is started, a shaft of the motor rotates to drive a main ratchet wheel to rotate, the main ratchet wheel can drive a chain to rotate, the chain rotates to drive an auxiliary ratchet wheel to rotate, the auxiliary ratchet wheel rotates to drive a rotating shaft to rotate, the rotating shaft rotates to drive a rope to rotate, the rope is wound on the rotating shaft, the rope pulls the combination rod to move rightwards, so that the combination rod is separated from the side hole, the clamping block is pulled upwards, lubricating oil is led into a sliding block from the top hole, the sliding block enters the sliding block, the lubricating oil lubricates a rotating part connected with the rotating part, the clamping block drives the clamping piece to be clamped with the clamping groove, so that the device can be used repeatedly, unnecessary troubles caused by operation of an operator at high altitude on the adjusting device are saved, and the adjusting efficiency is improved.

3. This from locking-type strain clamp, through upwards pulling joint piece, from the leading-in lubricating oil of apical pore to the sliding block, lubricating oil gets into the sliding block, it is lubricated that lubricating oil connects the rotating part on to the sliding block, the sliding block cools down the motor simultaneously, loosen the joint piece, the extension spring drives joint piece downstream, the joint piece drives fastener and block groove joint together to make this equipment convenient to detach and maintenance, the maintenance of being convenient for simultaneously, the running-in operating efficiency of part has been improved, lubricating oil leakage has been avoided simultaneously.

4. According to the self-locking strain clamp, gas is blown into the air bag, the air bag expands to drive the scraper to extrude five outer wall surfaces of the extension frame, the limiting block moves back and forth on the outer portion of the extension frame, and the scraping block scrapes out rust on the outer portion of the extension frame. Thereby make this equipment can manual regulation scraper blade and extend the extrusion force of frame for the stopper can be swift fix on extending the frame more, also can confirm the position of side opening at the fixed block according to the stopper simultaneously, and the shutting part of being convenient for inserts.

5. According to the self-locking strain clamp, gas is blown into the air bag, the air bag expands to drive the scraper to extrude five outer wall surfaces of the extension frame, the limiting block moves back and forth on the outer portion of the extension frame, and the scraping block scrapes out rust on the outer portion of the extension frame. Therefore, the equipment can scrape the rusted part of the outer wall surface of the extension frame as required, and the overall strength and the service life of the extension frame are improved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a schematic sectional front view of the structure of the present invention;

FIG. 4 is a schematic side cross-sectional view of the inventive structure;

FIG. 5 is a partial schematic view of A of FIG. 3;

fig. 6 is a partial schematic view of B in fig. 1.

In the figure: the device comprises a fixing block 1, a fixing hole 2, an extension frame 3, a side hole 4, a puncture-proof groove 5, a top hole 6, a front groove 7, a clamping block 8, a low block 9, a high block 10, a tension spring 11, a clamping piece 12, a sliding block 13, a clamping groove 14, a motor 15, a main ratchet wheel 16, a connecting groove 17, a rotating shaft 18, a chain 19, a supporting rod 20, an auxiliary ratchet wheel 21, a rotating groove 22, a rope 23, an inner groove 24, a rope groove 25, a combined groove 26, a spring 27, a combined rod 28, a groove pair 29, a limiting block 30, a groove scraping 31, a movable groove 32, a scraping plate 33, a scraping block 34, an air bag 35, a blocking block 36 and an air.

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. 1-6, the present invention is a self-locking strain clamp, including a fixing block 1, where the fixing block 1 is a rectangular structure, the fixing block 1 is fixedly installed on external electric tower equipment, a fixing hole 2 is formed on a front wall surface of the fixing block 1, the fixing hole 2 is a pentagonal groove, an extension frame 3 is disposed in the fixing hole 2, the extension frame 3 is a hollow pentagonal prism structure, front and rear side wall surfaces of the extension frame 3 are open, the extension frame 3 is fastened to the fixing hole 2, a side hole 4 is formed on a right wall surface of the extension frame 3, the side hole 4 is a circular through hole, two side holes 4 are provided, a stab-resistant groove 5 is formed on the front wall surface of the extension frame 3, the stab-resistant groove 5 is an annular groove, the stab-resistant groove 5 is communicated with an opening of the front wall surface of the extension frame 3, a top hole 6 is formed on an upper wall surface of the fixing block 1, the top hole 6 is a, the front groove 7 is a rectangular groove, the front groove 7 is communicated with the top hole 6, the rear wall surface inside the top hole 6 is fixedly provided with a low block 9, the low block 9 is of a rectangular structure, the rear wall surface inside the top hole 6 is fixedly provided with a high block 10, the high block 10 is of a rectangular structure, the high block 10 is positioned above the low block 9, the length of the high block 10 is half of the length of the low block 9, the upper wall surface of the low block 9 is fixedly provided with a tension spring 11, the tension spring 11 is of a conventional structure and is not described herein, the top hole 6 is internally provided with a clamping block 8, the clamping block 8 is of an L-shaped structure, the upper end of the clamping block 8 is clamped with the top hole 6, the rectangular block at the upper end of the clamping block 8 is welded with the tension spring 11, the lower wall surface of the clamping block 8 is attached with the lower wall surface inside the front groove 7, the lower wall surface of the rectangular structure at the upper end of the clamping block 8 is attached with the upper wall surface of the, the engaging member 12 is a whole body formed by two integrally formed plates, one plate of the engaging member 12 is rectangular, the other plate of the engaging member 12 is S-shaped, a sliding block 13 is arranged in the front groove 7, the sliding block 13 is of an L-shaped structure, the sliding block 13 is connected with the front groove 7 in a clamping manner, an engaging groove 14 is formed in the upper wall surface of the sliding block 13, the engaging groove 14 is an S-shaped groove, the engaging groove 14 is connected with the lower end plate of the engaging member 12 in a clamping manner, a motor 15 is fixedly mounted on the upper wall surface of the sliding block 13, the motor 15 is of a conventional structure, which is not described herein, the number of the motors 15 is two, a main ratchet 16 is fixedly mounted on the outer circumferential wall surface of a shaft of the motor 15, the main ratchet 16 is of a conventional structure, which is not described herein, the main ratchet 16 can rotate along with the shaft of the motor 15, a connecting groove 17 is formed in the left inner wall surface of the front groove 7, an inner groove 24 is formed in the left wall surface of the connecting groove 17, the inner groove 24 is a rectangular groove, a rotating groove 22 is formed in the rear wall surface of the inner groove 24, the rotating groove 22 is a T-shaped groove, the position of the rotating groove 22 is the same as the axial position of the rope groove 25, a rotating shaft 18 is arranged in the rotating groove 22, the rotating shaft 18 is of a special-shaped column structure, the cross section of the rotating shaft 18 is T-shaped, the rotating shaft 18 is connected with the rotating groove 22 in a clamped mode, the rotating shaft 18 can rotate in the rotating groove 22, supporting rods 20 are fixedly mounted on the outer circumferential wall surface of the rotating shaft 18, the supporting rods 20 are strip-shaped, five rotating grooves 22 are provided, an auxiliary ratchet 21 is arranged in the inner groove 24, the auxiliary ratchet 21 is of an existing structure, the redundant description is omitted, the chain 19 is connected with the auxiliary ratchet 21 and the main ratchet 16 at the same time, when the shaft of the motor 15 rotates to drive the main ratchet wheel 16 to rotate, the main ratchet wheel 16 can drive the chain 19 to rotate, the chain 19 rotates to drive the auxiliary ratchet wheel 21 to rotate, the auxiliary ratchet wheel 21 rotates to drive the rotating shaft 18 to rotate, the right wall surface of the inner groove 24 is provided with the rope groove 25, the rope groove 25 is an arc-shaped groove, the upper wall surface of the inner part of the inner groove 24 is provided with the combination groove 26, the combination groove 26 is a circular groove, the combination groove 26 is communicated with the inner groove 24, the fixing hole 2 and the rope groove 25, the right wall surface of the inner part of the rope groove 25 is fixedly provided with the spring 27, the spring 27 is of the prior structure and is not repeated herein, the spring 27 extends into the combination groove 26, the spring 27 is sleeved with the combination groove 26, the left wall surface of the inner part of the fixing hole 2 is provided with the opposite grooves 29, the opposite grooves 29 are circular grooves, two opposite grooves 29 are provided, the positions of the two opposite grooves 29 respectively, the combination rod 28 is a cylindrical structure, the combination rod 28 is connected with the combination groove 26 in a clamping manner, the combination rod 28 is connected with the opposite grooves 29 in a clamping manner, the positions of the two opposite grooves 29 correspond to the side holes 4, the two combination rods 28 are respectively connected with the two side holes 4 in a clamping manner, the right wall surface of the combination rod 28 is fixedly provided with the rope 23, the rope 23 is sleeved with the spring 27, the other end of the rope 23 penetrates through the rope groove 25 and the inner groove 24 to be fixedly arranged with the outer circle wall surface of the combination rod 28, the shaft of the rotating shaft 18 drives the rope 23 to rotate when rotating, so that the rope 23 is wound on the rotating shaft 18 or is unwound from the rotating shaft 18, the extension frame 3 is provided with a limiting block 30, the limiting block 30 is of a hollow cylindrical structure, the front wall surface of the limiting block 30 is provided with a scraping groove 31, the scraping groove 31 is a pentagonal through hole, the scraping groove 31, the movable groove 32 is an annular through hole, the air bag 35 is arranged inside the limiting block 30, the air bag 35 is of a conventional structure and is not described herein any more, the air bag 35 is filled with gas, the air bag 35 is of a hollow annular structure, the central through part of the air bag 35 is pentagonal, the air bag 35 is clamped with the inside of the limiting block 30, the air bag 35 is provided with an air port, a plugging block 36 is inserted into the air port on the air bag 35, the plugging block 36 is of a cylindrical structure, the outer circumferential wall surface of the limiting block 30 is provided with an air hole 37, the air hole 37 is a circular through hole, the air hole 37 is clamped with the plugging block 36, the five inner wall surfaces of the pentagonal through part of the air bag 35 are all fixedly provided with a scraping plate 33, the scraping plate 33 is of a rectangular structure, one side wall surface of the five scraping plates 33, which are close to each other, is all fixedly provided with a scraping, the flight 33 can float following the amount of gas in the air bag 35.

When the cable connecting device is used, a cable is inserted into the extension frame 3 to be fixed, the limiting block 30 is clamped with the extension frame 3, the spring 27 extrudes the connecting rod 28, the clamping block 8 is pushed into the side hole 4 by the spring 27, the connecting rod 28 is clamped with the opposite groove 29 through the side hole 4, when the extension frame 3 is disassembled, the motor 15 is started, the shaft of the motor 15 rotates to drive the main ratchet wheel 16 to rotate, the main ratchet wheel 16 can drive the chain 19 to rotate, the chain 19 rotates to drive the auxiliary ratchet wheel 21 to rotate, the auxiliary ratchet wheel 21 rotates to drive the rotating shaft 18 to rotate, the rotating shaft 18 rotates to drive the rope 23 to rotate, the rope 23 is wound on the rotating shaft 18, the rope 23 pulls the connecting rod 28 to move rightwards, the connecting rod 28 is separated from the side hole 4, the clamping block 8 is pulled upwards, lubricating oil is led into the sliding block 13 from the top hole 6, the lubricating oil enters the sliding block 13, simultaneously sliding block 13 cools down motor 15, loosen joint piece 8, extension spring 11 drives joint piece 8 and moves down, joint piece 8 drives fastener 12 and block groove 14 joint together, through taking out stifled jam 36, to the inside gas that blows of gasbag 35, gasbag 35 inflation drives scraper blade 33 and extrudees to five outer wall faces of extension frame 3, back-and-forth movement stopper 30, stopper 30 is in the outside back-and-forth movement of extension frame 3, outside rust that extension frame 3 was scraped out to scraping piece 34.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a from locking-type strain clamp, includes fixed block (1), fixed orifices (2) have been seted up on the preceding wall of fixed block (1), are provided with in fixed orifices (2) and extend frame (3), its characterized in that: the side hole (4) has been seted up to the right wall of extension frame (3), the preceding wall of extension frame (3) has been seted up and has been prevented thorn groove (5), apical pore (6) have been seted up to the last wall of fixed block (1), fore bay (7) have been seted up to the preceding wall of fixed block (1), the inside back wall fixed mounting of apical pore (6) has low piece (9), the inside back wall fixed mounting of apical pore (6) has high piece (10), the last wall fixed mounting of low piece (9) has extension spring (11), be provided with joint piece (8) in apical pore (6), the back wall fixed mounting of joint piece (8) has fastener (12), be provided with sliding block (13) in fore bay (7), block groove (14) has been seted up to the last wall of upper wall of sliding block (13), the last wall fixed mounting of sliding block (13) has motor (15), fixed mounting has main ratchet (16) on the axle excircle wall of motor, the inner left wall surface of the front groove (7) is provided with a connecting groove (17), the inner left wall surface of the connecting groove (17) is provided with an inner groove (24), the inner rear wall surface of the inner groove (24) is provided with a rotating groove (22), the rotating groove (22) is internally provided with a rotating shaft (18), the outer circle wall surface of the rotating shaft (18) is fixedly provided with a support rod (20), the inner groove (24) is internally provided with an auxiliary ratchet wheel (21), the auxiliary ratchet wheel (21) is provided with a chain (19), the inner right wall surface of the inner groove (24) is provided with a rope groove (25), the inner upper wall surface of the inner groove (24) is provided with a combining groove (26), the inner right wall surface of the rope groove (25) is fixedly provided with a spring (27), the inner left wall surface of the fixed hole (2) is provided with a butt groove (29), the left wall surface of the spring, be provided with stopper (30) on extending frame (3), scraping groove (31) have been seted up to the antetheca of stopper (30), movable groove (32) have been seted up to the inside interior round wall face of stopper (30), the inside of stopper (30) is provided with gasbag (35), it has jam piece (36) to peg graft in the gas port on gasbag (35), set up on the excircle wall face of stopper (30) and have gas pocket (37), equal fixed mounting has scraper blade (33) on five internal face of the pentagon through-hole part of gasbag (35), the equal fixed mounting of a lateral wall face that five scraper blades (33) are close to each other has scraping piece (34).

2. The self-locking strain clamp of claim 1, wherein: the combination rod (28) is connected with the combination groove (26) in a clamped mode, the combination rod (28) is connected with the opposite groove (29) in a clamped mode, the positions of the opposite grooves (29) correspond to the side holes (4), and the two combination rods (28) are connected with the two side holes (4) in a clamped mode respectively.

3. The self-locking strain clamp of claim 1, wherein: joint piece (8) are L type structure, and the upper end and apical pore (6) joint of joint piece (8) are in the same place, and the upper end rectangular block of joint piece (8) is in the same place with extension spring (11) welding, and the lower wall of joint piece (8) and the inside lower wall laminating of preceding groove (7) are in the same place, and the lower wall of the upper end rectangular structure of joint piece (8) is in the same place with the last wall laminating of high piece (10).

4. The self-locking strain clamp of claim 1, wherein: the rope (23) is sleeved with the spring (27), and the other end of the rope (23) penetrates through the rope groove (25) and the inner groove (24) to be fixedly installed with the outer circle wall surface of the combination rod (28).

5. The self-locking strain clamp of claim 1, wherein: the chain (19) is simultaneously connected with the auxiliary ratchet wheel (21) and the main ratchet wheel (16).

6. The self-locking strain clamp of claim 1, wherein: the high block (10) is positioned above the low block (9), and the length of the high block (10) is one half of that of the low block (9).

7. The self-locking strain clamp of claim 1, wherein: the cross section of the rotating shaft (18) is T-shaped, and the rotating shaft (18) is clamped with the rotating groove (22).

8. The self-locking strain clamp of claim 1, wherein: the scraping block (34) is a hollow rectangular pyramid, and the wall surface of one side, away from the scraping plate (33), of the scraping block (34) is open.

9. The self-locking strain clamp of claim 1, wherein: the scraping groove (31) is a pentagonal through hole, and the scraping groove (31) is connected with the extension frame (3) in a clamping mode.

10. The self-locking strain clamp of claim 1, wherein: the central through part of the air bag (35) is pentagonal, the air bag (35) is clamped with the inside of the limiting block (30), and an air port is formed in the air bag (35).