Intelligent continuous counter-pull assembly of negative-ring-free starting device

Abstract

The invention relates to the technical field of shield tunneling machines, in particular to an intelligent continuous counter-pull assembly of a non-negative-ring starting device, which comprises a hollow hydraulic cylinder, a track shaft fixedly arranged with the hollow hydraulic cylinder, and a reciprocating lock seat sleeved on the track shaft in a limiting manner, and the reciprocating lock seat can slide in a reciprocating manner along the axis direction of the track shaft; an extrusion locking block is arranged in the reciprocating lock seat, and when the extrusion locking block is in extrusion contact with a traction steel bar, the reciprocating lock seat and the traction steel bar can be locked; when the shield tunneling machine achieves non-negative-ring launching through traction of the traction steel bar, the assembly automatically locks the traction steel bar to conduct counter pulling when the hollow hydraulic cylinder stretches out, and when the hollow hydraulic cylinder contracts, automatic unlocking is conducted to follow forward, and continuous launching operation is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of shield machines, in particular to an intelligent continuous reverse pulling component without a negative ring starting device. Background Art

[0002] The propulsion of the shield machine depends on the top thrust of the cylinder, but it has not yet entered the stratum at the time of starting and cannot be driven by the reaction force of the soil. Under traditional technology, a reaction frame is established to support the negative ring segments to provide reverse thrust for the shield machine during the starting process. With the development of technology, a negative ring-free starting device has been produced, which can improve operating efficiency by eliminating the need to establish negative ring segments. The negative ring-free starting device mainly uses traction steel bars and hollow hydraulic cylinders to reversely push the shield machine.

[0003] The working process is that when the telescopic tube of the hollow hydraulic cylinder is extended, it is locked with the traction steel bar to achieve reverse pull and push. When the telescopic tube of the hollow hydraulic cylinder is retracted, the traction steel bar needs to be unlocked and separated from the telescopic tube to update the reverse pull position. In this process, traditional technology requires workers to tighten nuts to unlock and lock. However, due to the large number of traction steel bars, the workers' operation is inefficient, resulting in long downtime for each distance the shield machine moves, poor continuity and low efficiency. Summary of the Invention

[0004] The object of the present invention is to provide an intelligent continuous back-pull assembly without a negative ring initiating device, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an intelligent continuous reverse pull assembly without a negative ring starting device, comprising a hollow hydraulic cylinder, a track shaft fixedly mounted on the hollow hydraulic cylinder, and a reciprocating lock seat with a limit sleeve mounted on the track shaft, wherein the reciprocating lock seat can slide back and forth along the axis of the track shaft; The reciprocating lock seat is provided with an extrusion lock block inside, and when the extrusion lock block is in extrusion contact with the traction steel bar, the reciprocating lock seat and the traction steel bar can be locked; A lever pressing piece is rotatably provided on the reciprocating lock seat, and an oblique push sleeve is fixedly installed on the telescopic tube of the hollow hydraulic cylinder. When the hollow hydraulic cylinder drives the oblique push sleeve to move axially toward the direction of the reciprocating lock seat, the oblique push sleeve will be in compression contact with one end of the lever pressing piece and apply axial thrust and expansion rotational force to the lever pressing piece through the oblique surface. The lever pressing piece amplifies the expansion rotational force through the lever principle and drives the extrusion locking block to make the extrusion locking block come into extrusion contact with the traction steel bar.

[0006] The outer sleeve of the track shaft is provided with a support reverse thrust spring, which applies elastic pressure to the reciprocating lock seat, so that the reciprocating lock seat has a tendency to move toward the direction where the hollow hydraulic cylinder is located; A track base ring is fixedly provided at one end of the track shaft, and an end connecting block frame is provided at the other end. The track shaft is fixedly installed with the hollow hydraulic cylinder through the track base ring, and the end connecting block frame blocks and limits the support reverse thrust spring.

[0007] A safety explosion chamber is provided inside the lever pressure piece, solid gunpowder particles are provided in the safety explosion chamber, an arc igniter is provided on one side of the safety explosion chamber, and a laser displacement sensor is provided in the reciprocating lock seat to monitor the relative displacement between the reciprocating lock seat and the traction steel bar. When the hollow hydraulic cylinder extends and propels, a certain relative displacement occurs between the reciprocating lock seat and the traction steel bar, and the arc igniter is energized to generate an arc to detonate the solid gunpowder particles. The explosion pressure is ejected through the safety explosion chamber, increasing the expansion rotational force of the lever pressure piece.

[0008] A blocking rod is provided inside the safety explosion chamber to block and limit the solid gunpowder particles; The lever pressure piece has an interior with a receiving side cavity and an insert slot. The receiving side cavity is provided with an array of solid gunpowder pellets. The insert slot is provided with a filling insert that can move up and down. The outside of the filling insert is provided with a delayed unlocking mechanism, which locks the filling insert through the delayed unlocking mechanism. When the solid powder grains in the safety explosion chamber are detonated, the delayed unlocking mechanism unlocks the filling plug after a certain period of time. The filling plug moves up and down once, pushing the solid powder grains in the accommodating side chamber into the safety explosion chamber for replenishment. The delayed unlocking mechanism locks the filling plug again after a certain period of time.

[0009] The delayed unlocking mechanism includes a buffer gas tank, a one-way valve and an unlocking drive chamber. The buffer gas tank is fixedly mounted on the lever pressure piece. The buffer gas tank and the safety explosion chamber are connected via a one-way valve. The one-way valve allows the gas in the safety explosion chamber to flow in one direction toward the buffer gas tank. The unlocking drive chamber is opened in the lever pressure piece.

[0010] A piston disc is provided in the unlocking drive chamber, and a sliding sealing contact is formed between the unlocking drive chamber and the piston disc. A locking shaft is fixedly provided on one side of the piston disc. The locking shaft seal passes through the end position of the unlocking drive chamber and extends into the filling plug to limit and lock the filling plug. A primary beam gas path is provided between the unlocking drive cavity and the buffer gas tank, and the gas in the buffer gas tank enters the unlocking drive cavity through the primary beam gas path, driving the piston disk to move so that the filling plug in the locking shaft is pulled out and unlocked; a secondary beam hole is opened through the piston disk, and both the primary beam gas path and the secondary beam hole can limit the flow of gas passing through, and the flow cross-sectional area of the secondary beam hole is smaller than the flow cross-sectional area of the primary beam gas path.

[0011] A return spring is provided on the side of the piston disc away from the locking shaft, and an exhaust hole is provided through the end of the unlocking drive cavity away from the filling plug.

[0012] A magnetic top plate is fixedly provided on the filling plug, and a traction spring is connected to the magnetic top plate, and an elastic pulling force is applied to the magnetic top plate toward the direction where the lever pressure piece is located through the traction spring; An electromagnet module is provided on the outside of the magnetic top plate. When the electromagnet module is energized to generate magnetic force, it can attract the magnetic top plate to move away from the lever pressure piece. An extension bracket is fixedly provided on the outside of the lever pressure piece, and the electromagnet module is fixedly installed by the extension bracket.

[0013] The lever pressure piece is provided with a detachable loading and pressing fastener. When the loading and pressing fastener is removed, the accommodating side cavity will be opened, so that the solid gunpowder particles in the accommodating side cavity can be replenished and filled; the accommodating side cavity is provided with a powder pushing spring, which applies elastic pressure to the solid gunpowder particles through the powder pushing spring, so that the solid gunpowder particles have an elastic tendency to move toward the plug slot.

[0014] The surface of the extrusion locking block is provided with anti-slip grooves, and the outside of the extrusion locking block is provided with an annular spring piece; the extrusion locking block contacts the traction steel bar through the anti-slip grooves, and the annular spring piece enables the extrusion locking block to have an elastic movement tendency away from the traction steel bar; An expansion oblique push plane is provided on the surface of the oblique push sleeve, and an axial thrust and an expansion rotational force are applied to the lever pressing piece through the expansion oblique push plane.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The intelligent continuous reverse pulling component of the present invention can cooperate with the telescopic activity of the hollow hydraulic cylinder when the shield machine realizes negative ring starting by pulling the steel bars, so that when the hollow hydraulic cylinder is extended, the component automatically locks the pulling steel bars for reverse pulling, and when the hollow hydraulic cylinder is retracted, it automatically unlocks and follows forward, thereby eliminating the need for workers to perform unlocking and locking operations, thereby realizing continuous starting operations.

[0016] The present invention cooperates with the laser displacement sensor, the safety explosion chamber and the delayed unlocking mechanism, etc., and can cause the safety explosion chamber to produce an explosive shock once the relative displacement between the traction steel bar and the reciprocating lock seat is detected during the extension process of the hollow hydraulic cylinder, driving the lever pressure piece to expand instantly and vigorously, and further amplifying the torque through the lever principle of the lever pressure piece to forcefully squeeze the extrusion lock block, so that the extrusion lock block prints a groove on the surface of the traction steel bar through the anti-slip groove. The axial limiting resistance between the extrusion lock block and the traction steel bar is increased by the groove, thereby ensuring the locking between the extrusion lock block and the traction steel bar, and at the same time, an alarm prompt is issued to realize intelligent protection control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the non-negative ring starting device.

[0018] Figure 2 This is a schematic diagram of the intelligent continuous back-pull component of the present invention.

[0019] Figure 3 This is a schematic diagram of the explosion of the intelligent continuous back-pull component of the present invention.

[0020] Figure 4 This is a three-dimensional half-section diagram of the intelligent continuous reverse pull component of the present invention.

[0021] Figure 5 This is a three-dimensional half-section front view of the intelligent continuous reverse pull component of the present invention.

[0022] Figure 6 This is a three-dimensional half-section diagram of the lever pressure piece of the present invention.

[0023] Figure 7 This is a three-dimensional half-section partial structure front view of the lever pressure piece of the present invention.

[0024] Figure: 1, hollow hydraulic cylinder; 2, track shaft; 3, reciprocating lock seat; 4, extrusion lock block; 5, lever pressure piece; 6, inclined push sleeve; 7, safety explosion chamber; 8, solid gunpowder pellets; 9, arc igniter; 10, blocking rod; 11, receiving side chamber; 12, laser displacement sensor; 701, plug slot; 702, filling plug; 703, buffer gas tank; 704, one-way valve; 705, unlocking drive chamber; 706, piston plate; 707, locking shaft; 708, first-stage beam gas path; 70 9. Secondary beam hole; 710. Return spring; 711. Exhaust hole; 712. Magnetic top plate; 713. Traction spring; 714. Electromagnet module; 715. Extension bracket; 716. Loading press fastener; 717. Charge push spring; 201. Track base ring; 202. End connection block; 203. Support reverse thrust spring; 401. Anti-slip groove; 402. Annular spring; 601. Expansion oblique thrust plane; 301. Side wing bushing; 302. Limit support arm; 501. Fulcrum shaft. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1 to 7, the present invention provides a technical solution: an intelligent continuous back-pull component without a negative ring starting device, such as Figure 2 As shown in the figure, it includes a hollow hydraulic cylinder 1, a track shaft 2 fixedly arranged with the hollow hydraulic cylinder 1, and a reciprocating lock seat 3 with a limiting sleeve arranged on the track shaft 2.

[0027] The non-negative ring starting device under the background technology is as follows Figure 1 As shown in the figure, it includes structures such as a traction frame and traction steel bars. The traction steel bars are interspersed through the intelligent continuous reverse pulling component. The intelligent continuous reverse pulling component pushes the shield machine to start moving by reverse pulling the traction steel bars.

[0028] The reciprocating lock seat 3 of the present invention can slide back and forth along the axis of the track shaft 2. The hollow hydraulic cylinder 1 is a special hydraulic cylinder known in the prior art. An extrusion lock block 4 is provided within the reciprocating lock seat 3. When the extrusion lock block 4 contacts the traction steel bar, the reciprocating lock seat 3 and the traction steel bar are locked.

[0029] A lever pressing piece 5 is rotatably provided on the reciprocating lock seat 3, and an oblique push sleeve 6 is fixedly installed on the telescopic tube of the hollow hydraulic cylinder 1. When the hollow hydraulic cylinder 1 drives the oblique push sleeve 6 to move axially in the direction of the reciprocating lock seat 3, the oblique push sleeve 6 will be squeezed into contact with one end of the lever pressing piece 5, and apply axial thrust and expansion rotational force to the lever pressing piece 5 through the inclined surface; the lever pressing piece 5 amplifies the expansion rotational force through the lever principle, and squeezes and drives the squeezing lock block 4, so that the squeezing lock block 4 is squeezed into contact with the traction steel bar.

[0030] The outer sleeve of the track shaft 2 is provided with a support reverse thrust spring 203, which applies elastic pressure to the reciprocating lock seat 3, so that the reciprocating lock seat 3 has a tendency to move toward the direction of the hollow hydraulic cylinder 1; one end of the track shaft 2 is fixedly provided with a track base ring 201, and the other end is provided with an end connecting frame 202. The track shaft 2 is fixedly installed with the hollow hydraulic cylinder 1 through the track base ring 201, and the end connecting frame 202 blocks and limits the support reverse thrust spring 203.

[0031] The lever pressing piece 5 is provided with a safety explosion chamber 7 inside which solid gunpowder particles 8 are arranged. Figure 7 As shown in FIG, solid powder particles 8 are cylindrical solid powder with chamfered ends, and are detonated by an electric arc. An arc igniter 9 is disposed on one side of the safety explosion chamber 7, and a laser displacement sensor 12 is disposed in the reciprocating lock seat 3. The laser displacement sensor 12 monitors the relative displacement between the reciprocating lock seat 3 and the traction steel bar. When the hollow hydraulic cylinder 1 extends and propels the reciprocating lock seat 3 and the traction steel bar, the arc igniter 9 is energized, generating an arc that detonates the solid powder particles 8. The explosive pressure is ejected through the safety explosion chamber 7, increasing the expansion and rotational force of the lever pressure piece 5.

[0032] A blocking rod 10 is provided inside the safety explosion chamber 7 to block and limit the solid gunpowder particles 8; the blocking rod 10 is made of a metal rod.

[0033] The interior of the lever pressure piece 5 is provided with a accommodating side cavity 11 and an insert slot 701. The accommodating side cavity 11 is provided with an array of solid gunpowder grains 8. The insert slot 701 is provided with a filling insert 702 that can move up and down. The outside of the filling insert 702 is provided with a delayed unlocking mechanism, and the filling insert 702 is locked by the delayed unlocking mechanism; when the solid gunpowder grains 8 in the safety explosion cavity 7 are detonated, the delayed unlocking mechanism unlocks the filling insert 702 after a certain period of time, and the filling insert 702 moves up and down once to push the solid gunpowder grains 8 in the accommodating side cavity 11 into the safety explosion cavity 7 for replenishment. The delayed unlocking mechanism locks the filling insert 702 again after a certain period of time.

[0034] The delayed unlocking mechanism includes a buffer gas tank 703, a one-way valve 704 and an unlocking drive chamber 705. The buffer gas tank 703 is fixedly mounted on the lever pressure piece 5. The buffer gas tank 703 and the safety explosion chamber 7 are connected through the one-way valve 704. The one-way valve 704 allows the gas in the safety explosion chamber 7 to flow in one direction toward the buffer gas tank 703. The unlocking drive chamber 705 is opened in the lever pressure piece 5.

[0035] A piston disc 706 is provided in the unlocking drive chamber 705. The unlocking drive chamber 705 and the piston disc 706 are in sliding and sealing contact with each other. A locking shaft 707 is fixedly provided on one side of the piston disc 706. The locking shaft 707 passes through the end position of the unlocking drive chamber 705 in a sealing manner and extends into the filling plug 702 to limit and lock the filling plug 702. A first-level beam gas path 708 is provided between the unlocking drive chamber 705 and the buffer gas tank 703. The gas in the buffer gas tank 703 enters the unlocking drive chamber 705 through the first-level beam gas path 708, driving the piston disk 706 to move so that the filling plug 702 in the locking shaft 707 is pulled out and unlocked; a second-level beam hole 709 is opened through the piston disk 706, and both the first-level beam gas path 708 and the second-level beam hole 709 can limit the flow of gas passing through, and the flow cross-sectional area of the second-level beam hole 709 is smaller than the flow cross-sectional area of the first-level beam gas path 708.

[0036] A return spring 710 is provided on the side of the piston disc 706 away from the locking shaft 707 , and an exhaust hole 711 is formed through the end of the unlocking drive chamber 705 away from the filling plug 702 .

[0037] A magnetic top plate 712 is fixedly provided on the filling plug 702, and a traction spring 713 is connected to the magnetic top plate 712, and an elastic pulling force is applied to the magnetic top plate 712 toward the direction of the lever pressure piece 5 through the traction spring 713; an electromagnet module 714 is provided on the outside of the magnetic top plate 712, and when the electromagnet module 714 is energized to generate magnetic force, it can attract the magnetic top plate 712 to move away from the lever pressure piece 5, and an extension bracket 715 is fixedly provided on the outside of the lever pressure piece 5, and the electromagnet module 714 is fixedly installed by the extension bracket 715.

[0038] The lever pressing piece 5 is provided with a detachable loading pressing fastener 716. When the loading pressing fastener 716 is removed, the accommodating side cavity 11 will be opened, so that the solid gunpowder particles 8 in the accommodating side cavity 11 can be replenished and filled; a powder pushing spring 717 is provided in the accommodating side cavity 11, and the powder pushing spring 717 applies elastic pressure to the solid gunpowder particles 8, so that the solid gunpowder particles 8 have an elastic tendency to move toward the plug slot 701.

[0039] The surface of the extrusion lock block 4 is provided with anti-slip grooves 401, and the outside of the extrusion lock block 4 is provided with an annular spring piece 402; the extrusion lock block 4 contacts the traction steel bar through the anti-slip grooves 401, and the annular spring piece 402 enables the extrusion lock block 4 to have an elastic movement tendency away from the traction steel bar; An expansion oblique push plane 601 is provided on the surface of the oblique push sleeve 6 , and an axial thrust and an expansion rotational force are applied to the lever pressing piece 5 through the expansion oblique push plane 601 .

[0040] like Figure 2 As shown in FIG, wing shaft sleeves 301 are symmetrically provided on both sides of the reciprocating lock seat 3, and the track shaft 2 passes through the wing shaft sleeves 301 to limit the reciprocating lock seat 3.

[0041] like Figure 4 As shown in FIG, a limit support arm 302 is fixedly provided on the reciprocating lock seat 3, and the limit support arm 302 is used to limit and support the lever pressing piece 5 so that the end of the lever pressing piece 5 close to the oblique push sleeve 6 will not be excessively closed.

[0042] like Figure 4As shown in FIG, a fulcrum shaft 501 is fixedly provided in the reciprocating lock seat 3. The fulcrum shaft 501 serves as a fulcrum and passes through the lever pressing member 5. The distance between the end of the lever pressing member 5 close to the oblique thrust sleeve 6 and the fulcrum shaft 501 is much greater than the distance between the end of the lever pressing member 5 close to the extrusion lock block 4 and the fulcrum shaft 501. As a result, when the oblique thrust sleeve 6 is in compression contact with the lever pressing member 5 through the expansion oblique thrust plane 601, it generates an expansion rotational component force that drives the lever pressing member 5 to rotate around the fulcrum shaft 501 while generating an axial driving force. Moreover, by controlling the inclined angle of the expansion oblique thrust plane 601 and the lever ratio, the locking force generated between the extrusion lock block 4 and the traction steel bar under the compression of the lever pressing member 5 is greater than the axial driving force applied by the oblique thrust sleeve 6 to the lever pressing member 5, thereby ensuring the locking effect and cooperating with the support reverse thrust spring 203 to provide an elastic reverse thrust during initial locking.

[0043] Specifically, in the process of the hollow hydraulic cylinder 1 pushing the oblique thrust sleeve 6 out through the telescopic tube, initially, the elastic reverse thrust is provided by the support reverse thrust spring 203, so that the reciprocating lock seat 3 maintains the same position. At this time, the propulsion of the oblique thrust sleeve 6 drives the lever pressure piece 5 to rotate and expand, squeezing the extrusion lock block 4 so that the extrusion lock block 4 contacts the traction steel bar. Once the extrusion lock block 4 contacts the traction steel bar, the friction resistance generated will make the position of the reciprocating lock seat 3 more stable relative to the traction steel bar. At this time, the propulsion drive of the oblique thrust sleeve 6 produces more separation to drive the lever pressure piece 5 to rotate and expand, so that the reciprocating lock seat 3 and the traction steel bar are completely locked.

[0044] When the reciprocating lock seat 3 and the traction steel bar are completely locked, the continued extension of the oblique push sleeve 6 will push the lever pressure piece 5, the reciprocating lock seat 3 and the traction steel bar to move synchronously, perform reverse traction, and drive the shield machine to move.

[0045] When the hollow hydraulic cylinder 1 extends to the limit, the oblique thrust sleeve 6 is controlled to retract. After the oblique thrust sleeve 6 retracts, the reciprocating lock seat 3 is driven to follow the movement through the elastic force of the supporting reverse thrust spring 203, and the cycle is repeated to achieve continuous reverse pulling.

[0046] During the above process, the relative displacement between the reciprocating lock seat 3 and the traction steel bar is monitored by the laser displacement sensor 12. When and only when relative displacement occurs between the reciprocating lock seat 3 and the traction steel bar during the process of the hollow hydraulic cylinder 1 driving the inclined push sleeve 6 to extend, the arc igniter 9 is powered.

[0047] like Figure 6 and Figure 7As shown in the figure, an arc is generated by the arc igniter 9 to detonate the solid gunpowder particles 8, and the explosion pressure is ejected vertically downward through the safety explosion chamber 7. Since the lower outlet of the safety explosion chamber 7 is blocked by the expansion oblique push plane 601, the reverse thrust will drive the lever pressure piece 5 to expand and rotate, so that the extrusion lock block 4 is subjected to a huge instantaneous extrusion force. The extrusion lock block 4 prints a groove on the surface of the traction steel bar through the anti-slip groove 401, and the groove print coincides with the anti-slip groove 401. The axial limiting resistance between the extrusion lock block 4 and the traction steel bar is increased by the groove print, ensuring the locking between the reciprocating lock seat 3 and the traction steel bar, so that the locking can be remedied in time when relative displacement occurs between the reciprocating lock seat 3 and the traction steel bar.

[0048] like Figure 7 As shown in FIG, when the explosion of the solid gunpowder particles 8 causes a transient high pressure in the safety explosion chamber 7, the delayed unlocking mechanism locks the filling plug 702, thereby preventing the filling plug 702 from being pushed by the gas pressure. During the transient high pressure in the safety explosion chamber 7, the pressure in the safety explosion chamber 7 enters the buffer gas tank 703 through the one-way valve 704, causing a certain amount of high-pressure gas to be stored in the buffer gas tank 703. The high-pressure gas slowly flows into the unlocking drive chamber 705 due to the flow restriction of the primary beam gas path 708, pushing the piston disk 706 to move, causing the locking shaft 707 to be pulled out of the filling plug 702, thereby unlocking the filling plug 702. Due to the flow restriction effect of the primary beam gas path 708, it takes a certain amount of time for the locking shaft 707 to be pulled out of the filling plug 702 and unlocked, thereby delaying the unlocking. The filling plug 702 can only be completely unlocked after the high pressure in the safety explosion chamber 7 dissipates.

[0049] When the filling block 702 is unlocked, the electromagnet module 714 is powered on for a moment and then turned off. When determining whether the filling block 702 is unlocked or not and controlling the electromagnet module 714, the position of the locking shaft 707 can be detected by a displacement sensor, or it can be determined based on time. When the electromagnet module 714 is powered on, the magnetic top plate 712 is driven by magnetic force to move toward the electromagnet module 714, as shown in FIG. Figure 7 As shown in , at this time, the filling plug 702 moves upward so that the solid gunpowder particles 8 in the accommodating side cavity 11 are pushed into the plug slot 701 by the powder pushing spring 717. After the magnetic force of the electromagnet module 714 disappears, the traction spring 713 pulls the filling plug 702 downward to reset. At this time, the solid gunpowder particles 8 are pushed into the safety explosion cavity 7 by the filling plug 702 to complete the replenishment, and the accommodating side cavity 11 is closed at the same time.

[0050] As secondary beam aperture 709 continues to vent, once the pressurized gas in buffer gas tank 703 and unlocking drive chamber 705 is completely exhausted to the atmosphere through secondary beam aperture 709, the locking shaft 707, pushed by the elastic force of reset spring 710, is reinserted into filler plug 702, locking the device automatically. Because the cross-sectional area of secondary beam aperture 709 is much smaller than that of primary beam gas path 708, while some gas will continue to escape through secondary beam aperture 709 as piston disc 706 moves axially due to gas pressure, the relatively small amount of gas does not affect the displacement of piston disc 706.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent continuous reverse pull assembly without a negative ring starting device, comprising a hollow hydraulic cylinder, a track shaft fixed to the hollow hydraulic cylinder, and a reciprocating lock seat with a limit sleeve mounted on the track shaft, characterized in that: The reciprocating lock seat can slide back and forth along the axis of the track shaft; The reciprocating lock seat is provided with an extrusion lock block inside, and when the extrusion lock block is in extrusion contact with the traction steel bar, the reciprocating lock seat and the traction steel bar can be locked; A lever pressing piece is rotatably provided on the reciprocating lock seat, and an oblique push sleeve is fixedly installed on the telescopic tube of the hollow hydraulic cylinder. When the hollow hydraulic cylinder drives the oblique push sleeve to move axially toward the direction of the reciprocating lock seat, the oblique push sleeve will be in compression contact with one end of the lever pressing piece and apply axial thrust and expansion rotational force to the lever pressing piece through the oblique surface. The lever pressing piece amplifies the expansion rotational force through the lever principle and drives the extrusion locking block to make the extrusion locking block come into extrusion contact with the traction steel bar.

2. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 1 is characterized in that: The outer sleeve of the track shaft is provided with a support reverse thrust spring, which applies elastic pressure to the reciprocating lock seat, so that the reciprocating lock seat has a tendency to move toward the direction where the hollow hydraulic cylinder is located; A track base ring is fixedly provided at one end of the track shaft, and an end connecting block frame is provided at the other end. The track shaft is fixedly installed with the hollow hydraulic cylinder through the track base ring, and the end connecting block frame blocks and limits the support reverse thrust spring.

3. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 1 is characterized in that: A safety explosion chamber is provided inside the lever pressure piece, solid gunpowder particles are provided in the safety explosion chamber, an arc igniter is provided on one side of the safety explosion chamber, and a laser displacement sensor is provided in the reciprocating lock seat to monitor the relative displacement between the reciprocating lock seat and the traction steel bar. When the hollow hydraulic cylinder extends and propels, a certain relative displacement occurs between the reciprocating lock seat and the traction steel bar, and the arc igniter is energized to generate an arc to detonate the solid gunpowder particles. The explosion pressure is ejected through the safety explosion chamber, increasing the expansion rotational force of the lever pressure piece.

4. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 3 is characterized by: A blocking rod is provided inside the safety explosion chamber to block and limit the solid gunpowder particles; The lever pressure piece has an interior with a receiving side cavity and an insert slot. The receiving side cavity is provided with an array of solid gunpowder pellets. The insert slot is provided with a filling insert that can move up and down. The outside of the filling insert is provided with a delayed unlocking mechanism, which locks the filling insert through the delayed unlocking mechanism. When the solid powder grains in the safety explosion chamber are detonated, the delayed unlocking mechanism unlocks the filling plug after a certain period of time. The filling plug moves up and down once, pushing the solid powder grains in the accommodating side chamber into the safety explosion chamber for replenishment. The delayed unlocking mechanism locks the filling plug again after a certain period of time.

5. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 4 is characterized in that: The delayed unlocking mechanism includes a buffer gas tank, a one-way valve and an unlocking drive chamber. The buffer gas tank is fixedly mounted on the lever pressure piece. The buffer gas tank and the safety explosion chamber are connected via a one-way valve. The one-way valve allows the gas in the safety explosion chamber to flow in one direction toward the buffer gas tank. The unlocking drive chamber is opened in the lever pressure piece.

6. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 5, characterized in that: A piston disc is provided in the unlocking drive chamber, and a sliding sealing contact is formed between the unlocking drive chamber and the piston disc. A locking shaft is fixedly provided on one side of the piston disc. The locking shaft seal passes through the end position of the unlocking drive chamber and extends into the filling plug to limit and lock the filling plug. A primary beam gas path is provided between the unlocking drive cavity and the buffer gas tank, and the gas in the buffer gas tank enters the unlocking drive cavity through the primary beam gas path, driving the piston disk to move so that the filling plug in the locking shaft is pulled out and unlocked; a secondary beam hole is opened through the piston disk, and both the primary beam gas path and the secondary beam hole can limit the flow of gas passing through, and the flow cross-sectional area of the secondary beam hole is smaller than the flow cross-sectional area of the primary beam gas path.

7. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 6, characterized in that: A return spring is provided on the side of the piston disc away from the locking shaft, and an exhaust hole is provided through the end of the unlocking drive cavity away from the filling plug.

8. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 4, characterized in that: A magnetic top plate is fixedly provided on the filling plug, and a traction spring is connected to the magnetic top plate, and an elastic pulling force is applied to the magnetic top plate toward the direction where the lever pressure piece is located through the traction spring; An electromagnet module is provided on the outside of the magnetic top plate. When the electromagnet module is energized to generate magnetic force, it can attract the magnetic top plate to move away from the lever pressure piece. An extension bracket is fixedly provided on the outside of the lever pressure piece, and the electromagnet module is fixedly installed by the extension bracket.

9. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 4, characterized in that: The lever pressure piece is provided with a detachable loading and pressing fastener. When the loading and pressing fastener is removed, the accommodating side cavity will be opened, so that the solid gunpowder particles in the accommodating side cavity can be replenished and filled; the accommodating side cavity is provided with a powder pushing spring, which applies elastic pressure to the solid gunpowder particles through the powder pushing spring, so that the solid gunpowder particles have an elastic tendency to move toward the plug slot.

10. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 1, characterized in that: The surface of the extrusion locking block is provided with anti-slip grooves, and the outside of the extrusion locking block is provided with an annular spring piece; the extrusion locking block contacts the traction steel bar through the anti-slip grooves, and the annular spring piece makes the extrusion locking block have an elastic movement tendency away from the traction steel bar.

11. The intelligent continuous reverse pull assembly of the negative ring-free starting device according to claim 10, characterized in that: An expansion oblique push plane is provided on the surface of the oblique push sleeve, and an axial thrust and an expansion rotational force are applied to the lever pressing piece through the expansion oblique push plane.

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