阅读说明：本技术 一种盾构机用退刀装置 (Cutter retracting device for shield machine ) 是由 胡俊 姚凯 于 2021-08-31 设计创作，主要内容包括：本发明提供一种盾构机用退刀装置,包括盾构机主体、刀盘、化冰机构、推动机构以及上位机,化冰机构包括圆筒壁、第一旋转电机、化冰管、高温盐水桶以及位移机构,推动机构包括千斤顶、反力机构以及钢垫板,在刀盘发生冻结时,首先将钢垫板安装到洞口周围的土体上,然后将千斤顶连接反力机构和钢垫板,完成推动机构的安装准备,通过位移机构将化冰管向刀盘方向推动,并使化冰管从刀盘的穿行孔中穿出到外部,并使化冰管位于冻结的土体一侧,由高温盐水桶向化冰管中通入高温盐水进行化冰,在化冰的过程中,千斤顶推动盾构机主体后退,实现刀盘退刀,通过化冰和外力脱困相结合的方式,可以减少化冰的时长,防止化冰过度导致洞口坍塌事故。(The invention provides a cutter withdrawing device for a shield machine, which comprises a shield machine main body, a cutter head, an ice melting mechanism, a pushing mechanism and an upper computer, wherein the ice melting mechanism comprises a cylindrical wall, a first rotating motor, an ice melting pipe, a high-temperature brine barrel and a displacement mechanism, the pushing mechanism comprises a jack, a counter-force mechanism and a steel backing plate, when the cutter head is frozen, the steel backing plate is firstly installed on soil around a hole, then the jack is connected with the counter-force mechanism and the steel backing plate to complete the installation preparation of the pushing mechanism, the ice melting pipe is pushed towards the cutter head direction by the displacement mechanism, the ice melting pipe penetrates out of a penetrating hole of the cutter head, the ice melting pipe is positioned at one side of the frozen soil, high-temperature brine is introduced into the ice melting pipe by the high-temperature brine barrel to melt ice, the cutter head is pushed to withdraw by the jack in the ice melting process, the cutter head withdrawal is realized, and the ice melting and the external force removal are combined, the time for melting ice can be reduced, and the accident of cave opening collapse caused by excessive melting ice can be prevented.)

1. The cutter retracting device for the shield machine is characterized by comprising a shield machine main body, a cutter head, an ice melting mechanism, a pushing mechanism and an upper computer, wherein the cutter head is arranged at the front end of the shield machine main body in the tunneling direction; the pushing mechanism comprises a jack, a counter-force mechanism and a steel backing plate, the counter-force mechanism is symmetrically arranged on two sides of the main body of the shield machine and comprises a horizontal counter-force support and an inclined counter-force support, the horizontal counter-force support is arranged in the middle of the outer side wall of the main body of the shield machine, the inclined counter-force support is symmetrically arranged on the outer side wall of the main body of the shield machine above and below the horizontal counter-force support, the steel backing plate is arranged on a soil body outside the excavation hole, the jack is arranged on the steel backing plate, and an output shaft of the jack is connected with the horizontal counter-force support and the inclined counter-force support; the utility model discloses a shield constructs the hole of crossing, including blade disc shell, hole and the inside intercommunication of shield structure main part, the hole of crossing is provided with the hole of crossing on the blade disc shell, the hole of crossing communicates with the shield structure main part, the mechanism of deicing includes cylinder wall, deicing pipe, high temperature salt water bucket and displacement mechanism, the cylinder wall rotates with shield structure main part inner wall to be connected, the deicing pipe sets up at cylinder wall terminal surface, the deicing pipe is located hole one side of crossing, high temperature salt water bucket sets up on cylinder wall inside wall, and it passes through water pump and deicing union coupling, displacement mechanism drive deicing pipe removes along the hole horizontal direction of crossing, the host computer is connected with displacement mechanism and water pump electricity respectively.

2. The cutter retracting device for the shield tunneling machine according to claim 1, wherein the deicing mechanism further comprises a rotating mechanism, the cylindrical wall comprises a first ring body and a second ring body which are concentrically arranged, the first ring body is wrapped outside the second ring body, the outer side wall of the first ring body is rotatably connected with the inner wall of the shield tunneling machine body, the outer side wall of the second ring body is slidably connected with the inner side wall of the first ring body, the deicing pipe is arranged on the end surface of the second ring body, the high-temperature brine barrel is arranged on the inner side wall of the second ring body, the displacement mechanism drives the second ring body to move along the inner side wall of the first ring body, and the rotating mechanism drives the first ring body and the second ring body to rotate.

3. The cutter retracting device for the shield tunneling machine according to claim 2, wherein a sliding groove is formed in the inner side wall of the first ring body, a sliding block is arranged on the outer side wall of the second ring body, and the sliding block is located in the sliding groove.

4. The cutter retracting device for the shield tunneling machine according to claim 2, wherein the displacement mechanism comprises a hydraulic rod, the hydraulic rod is arranged on the inner side wall of the first ring body, an output shaft of the hydraulic rod is connected with the second ring body, and the upper computer is electrically connected with the hydraulic rod.

5. The cutter retracting device for the shield tunneling machine according to claim 2, wherein an annular groove is formed in the inner wall of the shield tunneling machine body, and the first ring body is embedded into the annular groove.

6. The cutter retracting device for the shield tunneling machine according to claim 2, wherein the deicing mechanism further comprises a first rotating motor, a sleeve, a telescopic pipe and a telescopic mechanism, the first rotating motor is arranged inside the side wall of the second ring body, an output shaft of the first rotating motor extends out of the second ring body and is connected with the deicing pipe, the sleeve is connected with the end face of the second ring body and is sleeved outside the deicing pipe, the sleeve is located on one side of the through hole, the telescopic pipes are distributed on the outer wall of the deicing pipe, a plurality of through holes for the telescopic pipes to extend out are formed in the sleeve, the through holes are located on the rotating path of the telescopic pipes, the telescopic mechanism drives the telescopic pipes to extend and retract along the through holes, and the upper computer is electrically connected with the telescopic mechanism and the first rotating motor.

7. The shield tunneling machine tool retracting device according to claim 6, wherein the telescopic pipe comprises a corrugated telescopic section and a stress section, one end of the corrugated telescopic section is connected with the deicing pipe, the other end of the corrugated telescopic section is connected with the stress section, the telescopic mechanism comprises a metal plate, a telescopic spring and an electromagnet, the metal plate is arranged on the outer surface of the stress section, the telescopic spring is connected with the outer wall of the deicing pipe and the metal plate, the electromagnet is arranged on the outer surface of the deicing pipe and located on one side of the metal plate, and the upper computer is electrically connected with the electromagnet.

8. The shield constructs machine and moves back sword device of claim 6, a structure that melts ice still includes positioning mechanism, positioning mechanism includes annular plane of reflection and infrared geminate transistor, annular plane of reflection sets up on the side that the cutter head shell is close to the shield constructs the machine main part, and the distance of its center to cutter head center equals to the distance of walking hole center to cutter head center, infrared geminate transistor symmetry sets up on the sleeve pipe keeps away from one end of second ring body, and it includes infrared transmitting tube and the infrared receiver tube that the symmetry set up, infrared transmitting tube and infrared receiver tube incline towards each other, infrared transmitting tube and infrared receiver tube are the same apart from the distance of sleeve pipe terminal surface center, the host computer is connected with infrared transmitting tube and infrared receiver tube electricity respectively.

9. The tool retracting device for the shield tunneling machine according to claim 2, wherein the rotating mechanism comprises a second rotating motor, a driving gear and a rack, the rack is arranged on the inner side wall of the first ring body and distributed annularly, the second rotating motor is arranged inside the shield tunneling machine main body, an output shaft of the second rotating motor is connected with the driving gear, a driving gear is meshed with the rack, and the upper computer is electrically connected with the second rotating motor.

10. The cutter retracting device for the shield tunneling machine according to claim 7, wherein the deicing mechanism further comprises a pipeline system, the pipeline system comprises a water inlet pipe and a water outlet pipe, one end of the water inlet pipe is connected with the water pump, the other end of the water inlet pipe extends into the telescopic pipe through the inside of the deicing pipe and is connected with the inner wall of the stressed section, one end of the water outlet pipe is connected with the deicing pipe, and the other end of the water outlet pipe is connected with the high-temperature brine barrel.

Technical Field

The invention relates to the technical field of tunnel construction, in particular to a cutter retracting device for a shield tunneling machine.

Background

The common reinforcement methods of the shield tunnel end include a deep stirring method, a high-pressure jet grouting method, an SMW construction method, an artificial freezing method, a grouting method, a plain concrete cast-in-place pile method, a dewatering method and the like, the soil body reinforcement can adopt a reinforcement means combining one construction method or a plurality of construction methods, in coastal soft soil areas, particularly when the stratum at the end of the shield tunnel is a water-rich sand layer, the engineering requirements are difficult to be met by adopting the conventional chemical strengthening means, the phenomena of water leakage and sand leakage are often found seriously after the hole probing is chemically reinforced, at the moment, in order to improve the strength of the soil body at the end of the shield tunnel, fully stop water and ensure the safety of the shield in and out of the tunnel, an end soil body is usually reinforced at the end of the water-rich sand layer by adopting an artificial freezing method, and the conventional artificial freezing technology comprises the steps of driving a vertical freezing pipe into the ground of the end to implement vertical freezing reinforcement or driving a horizontal freezing pipe into the position of an excavation portal in a working well to implement horizontal freezing reinforcement.

After the freezing method is applied for reinforcement, when the shield machine cuts an end frozen soil curtain, a cutter head of the shield machine is easy to freeze, the cutter head can be frozen in the frozen soil curtain usually after stopping rotating for more than 20 minutes, the time for assembling a ring of pipe segments by the shield machine can generally exceed 20 minutes, and once the shield machine breaks down, the time for assembling the ring of pipe segments is two or three hours, so that the cutter head of the shield machine in the end frozen soil curtain is very likely to be frozen.

At present, the conventional treatment measure after the cutter head is frozen is to thaw frozen earth curtains on the cutter head part, so that the shield stops tunneling at the end for too long time, at this time, the enclosure structure (such as an underground continuous wall) of the portal part is broken, and in addition, the thawing degree is not well controlled, transitional thawing can cause water burst, sand burst and even collapse of the portal, and safety problems are caused.

Disclosure of Invention

Therefore, the invention provides a cutter retracting device for a shield machine, which realizes cutter retracting by adopting a freeze thawing and external force escaping mode, can shorten the use time of cutter retracting and avoids portal collapse caused by excessive ice thawing.

The technical scheme of the invention is realized as follows:

a cutter retracting device for a shield machine comprises a shield machine main body, a cutter head, an ice melting mechanism, a pushing mechanism and an upper computer, wherein the cutter head is arranged at the front end of the shield machine main body in the tunneling direction; the pushing mechanism comprises a jack, a counter-force mechanism and a steel backing plate, the counter-force mechanism is symmetrically arranged on two sides of the main body of the shield machine and comprises a horizontal counter-force support and an inclined counter-force support, the horizontal counter-force support is arranged in the middle of the outer side wall of the main body of the shield machine, the inclined counter-force support is symmetrically arranged on the outer side wall of the main body of the shield machine above and below the horizontal counter-force support, the steel backing plate is arranged on a soil body outside the excavation hole, the jack is arranged on the steel backing plate, and an output shaft of the jack is connected with the horizontal counter-force support and the inclined counter-force support; the utility model discloses a shield constructs the hole of crossing, including blade disc shell, hole and the inside intercommunication of shield structure main part, the hole of crossing is provided with the hole of crossing on the blade disc shell, the hole of crossing communicates with the shield structure main part, the mechanism of deicing includes cylinder wall, deicing pipe, high temperature salt water bucket and displacement mechanism, the cylinder wall rotates with shield structure main part inner wall to be connected, the deicing pipe sets up at cylinder wall terminal surface, the deicing pipe is located hole one side of crossing, high temperature salt water bucket sets up on cylinder wall inside wall, and it passes through water pump and deicing union coupling, displacement mechanism drive deicing pipe removes along the hole horizontal direction of crossing, the host computer is connected with displacement mechanism and water pump electricity respectively.

Preferably, the deicing mechanism further comprises a rotating mechanism, the cylindrical wall comprises a first ring body and a second ring body which are concentrically arranged, the first ring body is wrapped outside the second ring body, the outer side wall of the first ring body is rotatably connected with the inner wall of the shield machine main body, the outer side wall of the second ring body is slidably connected with the inner side wall of the first ring body, the deicing pipe is arranged on the end face of the second ring body, the high-temperature brine barrel is arranged on the inner side wall of the second ring body, the displacement mechanism drives the second ring body to move along the inner side wall of the first ring body, and the rotating mechanism drives the first ring body and the second ring body to rotate.

Preferably, the inner side wall of the first ring body is provided with a sliding groove, the outer side wall of the second ring body is provided with a sliding block, and the sliding block is located in the sliding groove.

Preferably, the displacement mechanism comprises a hydraulic rod, the hydraulic rod is arranged on the inner side wall of the first ring body, an output shaft of the hydraulic rod is connected with the second ring body, and the upper computer is electrically connected with the hydraulic rod.

Preferably, the inner wall of the shield tunneling machine body is provided with an annular groove, and the first ring body is embedded into the annular groove.

Preferably, the deicing mechanism still includes first rotating electrical machines, sleeve pipe, flexible pipe and telescopic machanism, first rotating electrical machines sets up inside second ring body lateral wall, and its output shaft stretches out the outside and deicing union coupling of second ring body, the sleeve pipe is connected with second ring body terminal surface to the cover is established outside the deicing pipe, the sleeve pipe is located hole one side of walking, flexible pipe distributes on the deicing pipe outer wall, be provided with a plurality of through-holes that supply flexible pipe to stretch out on the sleeve pipe, the through-hole is located the rotation route of flexible pipe, the flexible pipe of telescopic machanism drive is flexible along the through-hole, the host computer is connected with telescopic machanism and first rotating electrical machines electricity.

Preferably, flexible pipe includes flexible section of ripple and atress section, flexible section one end of ripple and the tube coupling that melts ice, the other end is connected with the atress section, telescopic machanism includes metal sheet, expanding spring and electro-magnet, the metal sheet sets up at atress section surface, expanding spring connects and melts ice outer wall of pipe and metal sheet, the electro-magnet sets up and is melting ice outside of tubes surface to be located metal sheet one side, the host computer is connected with the electro-magnet electricity.

Preferably, the deicing mechanism still includes positioning mechanism, positioning mechanism includes annular plane of reflection and infrared geminate transistor, the annular plane of reflection sets up on the side that the cutter head shell is close to the shield constructs quick-witted main part, and its central distance to the cutter head center equals the distance of walking hole center to the cutter head center, infrared geminate transistor symmetry sets up on the sleeve pipe keeps away from one end of second ring body, and it includes infrared transmitting tube and the infrared receiving tube that the symmetry set up, infrared transmitting tube and infrared receiving tube incline towards each other, infrared transmitting tube and infrared receiving tube are the same apart from the distance of sleeve pipe terminal surface center, the host computer is connected with infrared transmitting tube and infrared receiving tube electricity respectively.

Preferably, rotary mechanism includes second rotating electrical machines, driving gear and rack, the rack sets up on first ring body inside wall to be the annular and distribute, second rotating electrical machines sets up inside the shield constructs quick-witted main part, and its output shaft and driving gear are connected, the driving gear meshes with the rack, the host computer is connected with second rotating electrical machines electricity.

Preferably, the deicing mechanism still includes pipe-line system, pipe-line system includes inlet tube and outlet pipe, inlet tube one end is connected with the water pump, and the other end stretches into flexible pipe through deicing intraduct to with atress section inner wall connection, outlet pipe one end and deicing union coupling, the other end is connected with high temperature salt water bucket.

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

the invention provides a cutter withdrawing device for a shield machine, wherein when a cutter head is frozen, a steel base plate is installed, two ends of a jack are connected with the steel base plate and a counter-force support respectively, an ice melting pipe is driven by a displacement mechanism to penetrate through a through hole and move to the outside of the cutter head, a water pump can convey high-temperature saline water into the ice melting pipe, the ice melting pipe can transfer heat, a frozen soil body around the cutter head is melted, in the ice melting process, the jack drives a shield machine main body to withdraw to realize cutter withdrawing, the ice melting mode and an external force escaping mode are combined together, the cutter withdrawing time can be shortened, accidents such as cave opening collapse caused by excessive ice melting are prevented, and the shield excavation process can be normally carried out.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a cutter retracting device for a shield tunneling machine according to the present invention;

FIG. 2 is a schematic view of the internal structure of a cutter retracting device for a shield tunneling machine according to the present invention;

FIG. 3 is a schematic view of a connecting structure of an ice melting pipe and a sleeve of the cutter retracting device for the shield tunneling machine of the invention;

FIG. 4 is a schematic view of a connecting structure of an infrared pair tube and a sleeve of the cutter retracting device for the shield tunneling machine of the present invention;

in the figure, 1 is a shield machine main body, 2 is a cutter head, 3 is an upper computer, 4 is a jack, 5 is a steel pad plate, 6 is a horizontal counter-force support, 7 is an inclined counter-force support, 8 is a through hole, 9 is a cylindrical wall, 10 is a first rotating motor, 11 is an ice melting pipe, 12 is a high-temperature brine barrel, 13 is a water pump, 14 is a first ring body, 15 is a second ring body, 16 is a chute, 17 is a sliding block, 18 is a hydraulic rod, 19 is an annular groove, 20 is a sleeve, 21 is a telescopic pipe, 22 is a through hole, 23 is a corrugated telescopic section, 24 is a stressed section, 25 is a metal plate, 26 is a telescopic spring, 27 is an electromagnet, 28 is an annular reflecting surface, 29 is an infrared transmitting pipe, 30 is an infrared receiving pipe, 31 is a second rotating motor, 32 is a driving gear, 33 is a rack, 34 is a water inlet pipe, and 35 is a water outlet pipe.

Detailed Description

For a better understanding of the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described with reference to the accompanying drawings.

Referring to fig. 1 to 4, the cutter retracting device for the shield tunneling machine provided by the invention comprises a shield tunneling machine main body 1, a cutter head 2, an ice melting mechanism, a pushing mechanism and an upper computer 3, wherein the cutter head 2 is arranged at the front end of the shield tunneling machine main body 1 in the tunneling direction, the ice melting mechanism and the upper computer 3 are arranged inside the shield tunneling machine main body 1, and the pushing mechanism is arranged outside the shield tunneling machine main body 1 and used for pushing the shield tunneling machine main body 1 to move in the direction opposite to the cutter head 2; the pushing mechanism comprises jacks 4, a counter-force mechanism and a steel backing plate 5, the counter-force mechanism is symmetrically arranged on two sides of a shield machine main body 1 and comprises horizontal counter-force supports 6 and inclined counter-force supports 7, the horizontal counter-force supports 6 are arranged in the middle of the outer side wall of the shield machine main body 1, the inclined counter-force supports 7 are symmetrically arranged on the outer side wall of the shield machine main body 1 above and below the horizontal counter-force supports 6, the steel backing plate 5 is arranged on a soil body outside an excavation opening, the jacks 4 are arranged on the steel backing plate 5, and output shafts of the jacks are connected with the horizontal counter-force supports 6 and the side walls of the inclined counter-force supports 7; be provided with hole 8 of walking on 2 shells of blade disc, the hole 8 of walking and the inside intercommunication of shield structure machine main part 1, it includes cylinder wall 9, deicing pipe 11, high temperature salt water bucket 12 and displacement mechanism to melt ice mechanism, cylinder wall 9 rotates with the 1 inner wall of shield structure machine main part to be connected, it sets up at cylinder wall 9 terminal surface to melt ice pipe 11, it is located 8 one sides of hole of walking to melt ice pipe 11, high temperature salt water bucket 12 sets up on 9 inside walls of cylinder wall, and it is connected with deicing pipe 11 through water pump 13, displacement mechanism drives and melts ice pipe 11 and removes along 8 horizontal direction in the hole of walking, host computer 3 is connected with displacement mechanism and water pump 13 electricity respectively.

The cutter withdrawing device for the shield machine is used for emergency treatment when a cutter head 2 of the shield machine is frozen, and comprises an ice melting mechanism and a pushing mechanism, wherein when the cutter head 2 is frozen, the pushing mechanism is installed, then soil around the frozen cutter head 2 is melted by the ice melting mechanism, and after the ice is melted to a certain degree, a shield machine main body 1 is driven by the pushing mechanism to retreat to realize cutter withdrawing of the cutter head 2.

For the pushing mechanism, the pushing mechanism is mainly realized by a jack 4, reaction mechanisms are respectively arranged on two sides of the outer surface of the shield machine main body 1, each reaction mechanism comprises a horizontal reaction support 6 and two inclined reaction supports 7, the horizontal reaction supports 6 are arranged in parallel with a horizontal line, the inclined reaction supports 7 are positioned on the upper side and the lower side of the horizontal reaction support 6 and form an included angle of 30 degrees with the horizontal reaction supports 6, after a steel base plate 5 is installed on soil around an excavated opening, the output shafts of the steel base plate 5 arranged on the jack 4 are connected with the horizontal reaction supports 6 and the inclined reaction supports 7, namely the number of the jacks 4 is 6, the shield machine main body 1 and the cutter head 2 can be driven to integrally retreat by the pushing action of the jack 4 to realize cutter retreat, for the jack 4, a hydraulic driving mode is adopted, a hydraulic station is arranged in the shield machine main body 1, the upper computer 3 controls the hydraulic station to realize the driving control of the jack 4.

For the deicing mechanism, the deicing mechanism comprises a cylindrical wall 9, the cylindrical wall 9 is arranged inside a shield machine main body 1 and serves as a bearing mechanism of a deicing pipe 11, when a cutter head 2 is frozen, a worker controls a displacement mechanism through an upper computer 3 inside the shield machine main body 1 to drive the deicing pipe 11 to move towards the cutter head 2, a through hole 8 is formed in the cutter head 2, the deicing pipe 11 penetrates out of the through hole 8 in the moving process and is located on one side of a frozen soil body, at the moment, high-temperature brine in a high-temperature brine barrel 12 is conveyed into the deicing pipe 11 through a control water pump 13, deicing of the soil body is achieved, and in the process of unfreezing and deicing, the shield machine main body 1 can be driven to retreat through a pushing mechanism.

Preferably, the deicing mechanism further comprises a rotating mechanism, the cylindrical wall 9 comprises a first ring body 14 and a second ring body 15 which are concentrically arranged, the first ring body 14 is wrapped outside the second ring body 15, the outer side wall of the first ring body is rotationally connected with the inner wall of the shield machine main body 1, the outer side wall of the second ring body 15 is slidably connected with the inner side wall of the first ring body 14, the deicing pipe 11 is arranged on the end surface of the second ring body 15, the high-temperature brine barrel 12 is arranged on the inner side wall of the second ring body 15, the displacement mechanism drives the second ring body 15 to move along the inner side wall of the first ring body 14, and the rotating mechanism drives the first ring body 14 and the second ring body 15 to rotate.

The cylinder wall 9 is divided into two ring bodies, wherein the first ring body 14 is used for performing rotary motion, the second ring body 15 is used for performing linear motion, the shield machine has randomness when being frozen, and the positions of the through holes 8 formed in the shield machine are random, so that the position of the ice melting pipe 11 needs to be adjusted, the ice melting pipe 11 is arranged on the end face of the second ring body 15 and then drives the first ring body 14 and the second ring body 15 to integrally rotate, and after the ice melting pipe 11 is opposite to the through holes 8, the second ring body 15 is driven to perform linear motion through the displacement mechanism, so that the ice melting pipe 11 passes through the through holes 8.

Preferably, the inner side wall of the first ring body 14 is provided with a sliding groove 16, the outer side wall of the second ring body 15 is provided with a sliding block 17, and the sliding block 17 is located in the sliding groove 16.

When the displacement mechanism drives the second ring body 15 to do linear motion, the sliding block 17 can slide along the sliding groove 16, and simultaneously when the first ring body 14 is driven to rotate, the first ring body 14 can drive the second ring body 15 to synchronously rotate because the sliding block 17 is arranged in the sliding groove 16.

Preferably, the displacement mechanism comprises a hydraulic rod 18, the hydraulic rod 18 is arranged on the inner side wall of the first ring body 14, an output shaft of the hydraulic rod 18 is connected with the second ring body 15, and the upper computer 3 is electrically connected with the hydraulic rod 18.

A hydraulic rod 18 is provided to push the second ring 15 in a linear movement.

Preferably, the inner wall of the shield machine main body 1 is provided with an annular groove 19, and the first ring body 14 is embedded into the annular groove 19.

The annular groove 19 is arranged to enable the first ring body 14 to be in close contact with the inner wall of the shield tunneling machine main body 1, so that the rotating mechanism can drive the first ring body 14 and the second ring body 15 to rotate conveniently.

Preferably, the deicing mechanism further comprises a first rotating motor 10, a sleeve 20, a telescopic pipe 21 and a telescopic mechanism, the first rotating motor 10 is arranged inside the side wall of the second ring body 15, an output shaft of the first rotating motor extends out of the second ring body 15 and is connected with the deicing pipe 11, the sleeve 20 is connected with the end face of the second ring body 15 and is sleeved outside the deicing pipe 11, the sleeve 20 is located on one side of the through hole 8, the telescopic pipe 21 is distributed on the outer wall of the deicing pipe 11, a plurality of through holes 22 for the telescopic pipe 21 to extend out are formed in the sleeve 20, the through holes 22 are located on the rotating path of the telescopic pipe 21, the telescopic pipe 21 is driven by the telescopic mechanism to stretch along the through holes 22, and the upper computer 3 is electrically connected with the telescopic mechanism and the first rotating motor 10.

In order to improve the deicing efficiency, the outer wall of the deicing pipe 11 is provided with a plurality of extension pipes 21, the extension pipes 21 are accommodated in the sleeve 20 through the extension mechanisms in an initial state, when deicing is required, the sleeve 20 and the deicing pipe 11 firstly pass through the through hole 8 and move to the outside of the cutter head 2, the upper computer 3 drives the first rotating motor 10 to drive the deicing pipe 11 to rotate, after the extension pipes 21 rotate to the position of the through hole 22, the extension pipes 21 are driven by the extension mechanisms to extend out of the sleeve 20 from the through hole 22, and high-temperature saline water can flow into the deicing pipe 11 and the extension pipes 21, so that the deicing efficiency is improved.

Preferably, flexible pipe 21 includes flexible section 23 of ripple and atress section 24, flexible section 23 one end of ripple is connected with deicing pipe 11, and the other end is connected with atress section 24, telescopic machanism includes metal sheet 25, expanding spring 26 and electro-magnet 27, metal sheet 25 sets up at atress section 24 surface, 11 outer walls of deicing pipe and metal sheet 25 are connected to expanding spring 26, electro-magnet 27 sets up at deicing pipe 11 surface to be located metal sheet 25 one side, host computer 3 is connected with electro-magnet 27 electricity.

In an initial state, the extension tube 21 is accommodated in the sleeve 20, the electromagnet 27 is not powered on, the inner wall of the sleeve 20 abuts against the extension tube 21, when ice melting is required, the first rotating motor 10 can drive the ice melting tube 11 to rotate, so that the extension tube 21 rotates to the through hole 22, under the action of the extension spring 26, the metal plate 25 and the stress section 24 are driven to move to the outside of the sleeve 20 from the through hole 22, the corrugated expansion section 23 is stretched, after the ice melting is finished, the electromagnet 27 is controlled to be powered on through the upper computer 3, the electromagnet 27 carries out magnetic attraction on the metal plate 25, so that the stress section 24 moves to the inside of the sleeve 20 from the through hole 22, the corrugated expansion section 23 is contracted, then the first rotating motor 10 is driven to drive the ice melting tube 11 to rotate, the extension tube 21 leaves the through hole 22, the accommodation of the extension tube 21 is completed, then the power supply of the electromagnet 27 is cut off, and the waste of the electric energy caused by continuous power supply is avoided, in order to ensure that the magnetic attraction of the electromagnet 27 does not influence the extension spring 26, the extension spring 6 of the present invention is made of non-metallic material, and the elastic force of the extension spring 6 is smaller than the magnetic force of the electromagnet 27.

Preferably, the deicing mechanism still includes positioning mechanism, positioning mechanism includes annular plane of reflection 28 and infrared geminate transistors, annular plane of reflection 28 sets up on the side that shield constructs quick-witted main part 1 is close to the 2 shells of blade disc, and its center equals to the distance of passing hole 8 center to blade disc 2 center to the distance at blade disc 2 center, infrared geminate transistors symmetry sets up and is served at sleeve pipe 20 keeps away from one of second ring body 15, and it includes infrared transmitting tube 29 and the infrared receiving tube 30 that the symmetry set up, infrared transmitting tube 29 and the slope of infrared receiving tube 30 orientation each other, infrared transmitting tube 29 and infrared receiving tube 30 are the same apart from the distance at sleeve pipe 20 end face center, host computer 3 is connected with infrared transmitting tube 29 and infrared receiving tube 30 electricity respectively.

Because the freezing of the cutter head 2 is random, when the ice melting is carried out, the ice melting pipe 11 can move only by ensuring that the ice melting pipe 11 is opposite to the through hole 8, therefore, the invention is provided with a positioning mechanism, the positioning mechanism comprises an annular reflecting surface 28, the annular reflecting surface 28 is arranged on the side wall of the cutter head 2, the annular reflecting surface and the through hole 22 are positioned on the same circumference, simultaneously, the end part of each sleeve 20 is provided with two groups of infrared pair pipes, the infrared pair pipes are positioned at the edge of the end part of the sleeve 20 and are symmetrically arranged, each group of infrared pair pipes comprises an infrared transmitting pipe 29 and an infrared receiving pipe 30, all the infrared transmitting pipes 29 and the infrared receiving pipes 30 are positioned on the same circumference, when the rotating mechanism drives the first ring body 14 and the second ring body 15 to rotate, the infrared pair pipes can synchronously rotate, when the sleeve 20 is not aligned with the through hole 8, the infrared light emitted by the infrared transmitting pipes 29 is transmitted by the annular reflecting surface 28 and then received by the infrared receiving pipes 30, at this time, it is determined that the sleeve 20 is not aligned with the through hole 8, and only when the sleeve 20 is aligned with the through hole 8, the light emitted from the infrared emission tube 29 directly passes through the through hole 8 without being received by the infrared reception tube 30, and only when the infrared pair tubes on both sides are not triggered, it is determined that the sleeve 20 is opposite to the through hole 8, and at this time, the hydraulic rod 18 can drive the second ring body 15 to move, and the sleeve 20 passes through the through groove.

Preferably, the rotating mechanism includes a second rotating motor 31, a driving gear 32 and a rack 33, the rack 33 is disposed on the inner side wall of the first ring body 14 and is distributed annularly, the second rotating motor 31 is disposed inside the shield tunneling machine main body 1, an output shaft of the second rotating motor is connected with the driving gear 32, the driving gear 32 is engaged with the rack 33, and the upper computer 3 is electrically connected with the second rotating motor 31.

When the first ring body 14 and the second ring body 15 are driven to rotate, the second rotating motor 31 drives the driving gear 32 to rotate, so that the driving gear 32 drives the first ring body 14 to rotate, and the first ring body 14 can drive the second ring body 15 to rotate.

Preferably, the deicing mechanism still includes pipe-line system, pipe-line system includes inlet tube 34 and outlet pipe 35, inlet tube 34 one end is connected with water pump 13, and the other end stretches into in the flexible pipe 21 through deicing pipe 11 is inside to with stress section 24 inner wall connection, outlet pipe 35 one end is connected with deicing pipe 11, and the other end is connected with high temperature brine bucket 12.

High-temperature saline water is pumped into the water inlet pipe 34 through the water pump 13 and conveyed into the extension pipe 21, then flows out of the extension pipe 21 to the interior of the deicing pipe 11 and flows back into the high-temperature saline water barrel 12 through the water outlet pipe 35, the cyclic utilization of the saline water is realized, one end of the water inlet pipe 34 is fixed on the inner wall of the stress section 24, the water inlet pipe 34 can move in a telescopic mode along with the stress section 24, and the high-temperature saline water is guaranteed to be conveyed into the stress section and then flows back into the deicing pipe 11.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.