A freezing refrigeration device for shield section freezing construction

Abstract

The present invention belongs to the field of refrigeration technology, and discloses a freezing refrigeration device for shield section freezing construction, including a freezing pipe assembly, wherein a refrigerant external pipe assembly and a one-way locking assembly are arranged at the end of the freezing pipe assembly, the refrigerant external pipe assembly feeds refrigerant into the freezing pipe assembly, and the refrigerant external pipe assembly is connected with an external refrigerant circulation device, cooperates with the one-way locking of the one-way locking assembly, and the refrigerant external pipe assembly is installed at the end of the freezing pipe assembly in a press-fitting manner. As the refrigerant external pipe assembly continuously feeds refrigerant into the freezing pipe assembly, a follow-up vacuum heat insulation and vacuum refrigeration protection structure is formed in the inner cavity at the end of the freezing pipe assembly. The present invention realizes the follow-up formation of a vacuum protection layer and a cold storage protection layer during the refrigerant feeding process, and this formation does not require the aid of external force, and forms a double-layer protection for the joint between the freezing pipe assembly and the refrigerant external pipe assembly, thereby further avoiding energy loss at the joint.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigeration, and in particular relates to a freezing refrigeration device for shield section freezing construction. Background Art

[0002] In the foundation reinforcement project of the underground excavation construction of the subway shield section communication channel, the commonly used methods are mixing piles, rotary jet piles, pressure grouting, etc. However, in the water-rich fine sand stratum, it is difficult to control the loss of cement slurry, and the above construction methods often fail to achieve the expected reinforcement effect; the communication channel is generally located below the road surface of the busy street, and the ground traffic is busy, so it is impossible to occupy the road surface for drilling and pile construction, so the freezing method has become a better choice for foundation reinforcement.

[0003] The prior art has the following problems: during shield construction and freezing construction, a trench is excavated during construction, and then a freezing pipe is placed in the trench. At the same time, the freezing pipe is connected to an external refrigeration device. In this way, freezing is achieved around the freezing pipe. However, during use, we found the following problems. On the one hand, the way the freezing pipe is connected to the outside is relatively complicated, which causes a lot of manpower and time to be wasted in this procedure. On the other hand, when the freezing pipe is connected to the external pipeline, the port cannot form good protection, specifically protection to reduce the loss of cold air. This results in a gap in the connection between the freezing pipe and the external pipeline during actual use, where cold air is lost. Therefore, it is urgent to solve this problem. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a freezing refrigeration device for shield section freezing construction, which has the characteristic of convenient docking.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a freezing refrigeration device for shield section freezing construction, comprising a freezing pipe assembly, wherein a refrigerant external pipe assembly and a one-way locking assembly are arranged at the end of the freezing pipe assembly, the refrigerant external pipe assembly feeds refrigerant into the freezing pipe assembly and the refrigerant external pipe assembly is connected to an external refrigerant circulation device, and in conjunction with the one-way locking of the one-way locking assembly, the refrigerant external pipe assembly is installed at the end of the freezing pipe assembly in a press-fitting manner, and as the refrigerant external pipe assembly continues to feed refrigerant into the freezing pipe assembly, the inner cavity at the end of the freezing pipe assembly forms a follow-up vacuum insulation and vacuum refrigeration protection structure.

[0006] In a preferred embodiment of a freezing refrigeration device for shield section freezing construction, the freezing pipe assembly includes a freezing bottom pipe, a joint end pipe is fixedly arranged on the top of the freezing bottom pipe, an inner ring arm and an inner seat inner platform are fixedly arranged in the inner cavity of the joint end pipe, the inner ring arm is located outside the inner seat inner platform, an inlet groove and an outlet groove are opened on the inner seat inner platform, a fixed inner ring platform is fixedly arranged between the inner seat inner platform and the joint end pipe, a second ventilation pipe is arranged on the fixed inner ring platform between the inner ring arm and the joint end pipe, and a second ventilation pipe is also arranged on the fixed inner ring platform between the inner seat inner platform and the inner ring arm, a first fixed side platform and a second fixed side platform are fixedly arranged on the outer wall of the joint end pipe, and an inner side arm platform is fixedly arranged on the inner wall of the joint end pipe, a plurality of transverse grooves and an arc groove are opened on the top of the joint end pipe, vertical grooves are opened on the joint end pipe and the inner ring arm, a driving shaft is rotatably arranged inside the joint end pipe, and air intake pipes are fixedly arranged at both ends of the outer wall of the joint end pipe. The first and second annular pistons are rotatably arranged on the driving shaft by a crank arm and a piston arm, and a first ventilation pipe is arranged on the first and second annular pistons, and a one-way valve is arranged on the first and second ventilation pipes, and a fin is arranged on the driving shaft, and a ventilation straight pipe and an inner cavity disk with a disk groove are arranged on the intake pipe, and an inner cavity slide rod is slidably arranged through the inner cavity disk, and a sealed piston and an inner cavity push disk are fixedly arranged at both ends of the inner cavity slide rod, and a push spring is sleeved on the inner cavity slide rod, and a first circulation groove and a second circulation groove are opened inside the freezing bottom pipe, and a first spiral guide plate and a second spiral guide plate are arranged in the first circulation groove and the second circulation groove, respectively, a first inner cavity is formed between the inner ring arm and the inner seat inner platform, a second inner cavity is formed between the inner ring arm and the joint end tube, an isolation cavity is formed between the inner seat inner platform, the inner ring arm and the fixed inner ring platform, and a water storage cavity is formed between the joint end tube, the inner ring arm and the fixed inner ring platform;

[0007] The refrigerant external pipe assembly comprises a double-way external pipe, the end of which is provided with a handle and a locking end platform, and the end surface of which is provided with an inlet pipe and an outlet pipe;

[0008] The one-way locking assembly includes a geared ring and a reset seat cap, the outer periphery of the geared ring is geared with a plurality of geared wheels, the top of the geared wheel is geared with a geared arm, a locking arc plate is fixedly provided at the front end of the geared arm, one end of the outer periphery of the geared ring is geared with a first locking gear through a second locking gear, a ratchet and a driving column shaft are fixedly provided on the first locking gear through a vertical shaft rod, a spiral guide rail groove is provided on the driving column shaft, a guide rail boss is fixedly provided on the inner wall of the reset seat cap, and a plurality of cross frame rods are fixedly provided on the outer arm of the reset seat cap through an outer ring frame, an inner ring frame is fixedly provided at the ends of the plurality of cross frame rods, a plurality of vertical frame rods are fixedly provided on the inner ring frame, the ratchet wheel is in contact with and geared with the ratchet arm through a top pressure spring, and a reset spring is fixedly provided at the bottom of the reset seat cap.

[0009] In a preferred embodiment of a freezing refrigeration device for shield section freezing construction, the driving shaft is rotatably connected to the inner seat, inner platform, inner ring arm and joint end pipe, the fin is located in the inlet groove, the second annular piston moves up and down in the first inner cavity, the first annular piston moves up and down in the second inner cavity, and the second annular piston and the first annular piston are located above the fixed inner ring platform.

[0010] In a preferred embodiment of a freezing refrigeration device for shield section freezing construction, one end of the push spring abuts against the inner cavity disk, and the other end of the push spring abuts against the inner cavity push disk. Through the pushing of the push spring, the closed piston seals the disk groove, and the ventilation straight pipe on one of the air inlet pipes is inserted into the water holding cavity, and the ventilation straight pipe on the other air inlet pipe is inserted into the isolation cavity.

[0011] In a preferred embodiment of a freezing refrigeration device for shield section freezing construction, a through groove is opened between the second circulation groove and the first circulation groove, the outlet pipe and the inlet pipe are respectively inserted into the outlet groove and the inlet groove, and the outlet pipe and the inlet pipe are directly opposite to the two second circulation grooves.

[0012] In a preferred embodiment of a freezing refrigeration device for shield section freezing construction, the bottom of the geared ring is rotatably set on the top surface of the inner ring arm, the geared wheel is rotatably set on the inner arm platform, the ratchet arm, the second locking gear and the first locking gear are rotatably set on the first fixed side platform, the geared arm slides in the horizontal groove, the horizontal frame rod slides in the vertical groove, and the inner ring frame is located in the first inner cavity.

[0013] In a preferred embodiment of a freezing refrigeration device for shield section freezing construction, the reset seat cap is sleeved on the outside of the driving column shaft, the guide rail boss is inserted in the spiral guide rail groove, the bottom of the reset spring is fixed on the second fixed side platform, and the two ends of the top pressure spring are fixed on the ratchet arm and the outer wall of the joint end tube.

[0014] In a preferred embodiment of a freezing refrigeration device for shield section freezing construction, the locking end platform is inserted into the first inner cavity, and the locking end platform presses downward against the vertical frame rod, and the bottom of the locking arc plate presses against the top of the locking end platform.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the refrigerant external pipe assembly feeds refrigerant into the freezing pipe assembly and the refrigerant external pipe assembly is connected to an external refrigerant circulation device, cooperates with the one-way lock of the one-way lock assembly, and the refrigerant external pipe assembly is installed at the end of the freezing pipe assembly in a press-fit manner. As the refrigerant external pipe assembly continues to feed refrigerant into the freezing pipe assembly, a follow-up vacuum insulation and vacuum refrigeration protection structure is formed in the inner cavity at the end of the freezing pipe assembly. The present invention realizes the follow-up formation of the vacuum protection layer and the refrigeration protection layer during the refrigerant feeding process. This formation does not require the aid of external force, and A double layer of protection is formed at the joint of the components to further avoid energy loss at the joint. When the refrigerant external pipe assembly of the present invention is installed between the freezing pipe assembly, the outlet pipe and the inlet pipe at one end of the double-way external pipe are respectively inserted into the outlet groove and the inlet groove, and the insertion and pressing are continued. At this time, the locking end platform moves downward in the first inner cavity, and the bottom end of the locking end platform faces the vertical frame rod to form a downward pressing pressure. When the vertical frame rod moves downward, it drives the reset seat cap to move downward on the outside of the driving column shaft. During the downward movement, the guide rail protrusion and the spiral guide rail groove cooperate with each other. At this time, the vertical shaft rod rotates on the first fixed side platform. At this time, the rotation of the vertical shaft rod drives the first locking gear to rotate, and the first A locking gear drives a geared ring to rotate through a second locking gear, and the geared ring drives a geared wheel to rotate, and the geared wheel forms an inward pulling force on the geared arm. When the refrigerant external pipe assembly is assembled and docked at the end of the freezing pipe assembly, multiple geared arms drive multiple locking arc plates to move to the top of the locking end platform. At this time, the refrigerant external pipe assembly and the freezing pipe assembly are assembled and docked. In simple terms, it is only necessary to continuously dock and press the refrigerant external pipe assembly at the port of the freezing pipe assembly to achieve the connection and docking of the freezing pipe assembly and the port of the refrigerant external pipe assembly. The present invention is provided with a ratchet on the top of the first locking gear, and a There is a ratchet arm cooperating with it, and through the cooperation of the ratchet wheel and the ratchet arm, the first locking gear can only rotate in one direction, that is, the gear arm can only be pushed inward, that is, when the refrigerant external pipe assembly is pressed and docked at the freezing pipe assembly, at this time, multiple gear arms drive multiple locking arc plates to push inward toward the top of the locking end platform. This push is a one-way action when the freezing pipe assembly and the refrigerant external pipe assembly are spliced ​​at the port. That is, it ensures that when the freezing pipe assembly and the refrigerant external pipe assembly are docked in place, the one-way locking of the one-way locking assembly can achieve the reliability and convenience of the docking installation of the freezing pipe assembly and the refrigerant external pipe assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A perspective view of the present invention;

[0017] Figure 2 An exploded view of the present invention;

[0018] Figure 3 A three-dimensional diagram of a freezing pipe assembly of the present invention;

[0019] Figure 4 It is an exploded view of the freezing bottom pipe of the present invention;

[0020] Figure 5 is a cross-sectional view of a joint end pipe of the present invention;

[0021] Figure 6 An exploded view of the drive shaft of the present invention;

[0022] Figure 7 is a cross-sectional view of an air intake pipe of the present invention;

[0023] Figure 8 is a three-dimensional diagram of the refrigerant external pipe assembly of the present invention;

[0024] Fig. 9 is a three-dimensional diagram of a one-way locking assembly of the present invention;

[0025] Fig.10 An exploded view of a partial structure of a one-way locking assembly of the present invention;

[0026] In the figure: 100, freezing pipe assembly; 101, freezing bottom pipe; 102, joint end pipe; 103, first circulation groove; 104, second circulation groove; 105, first spiral guide plate; 106, second spiral guide plate; 107, first inner cavity; 108, inner ring arm; 109, second inner cavity; 110, outlet groove; 111, inner seat and inner platform; 112, inlet groove; 113, air inlet pipe; 114, vertical groove; 115, horizontal groove Groove; 116, arc groove; 117, first fixed side platform; 118, inner arm platform; 119, first ventilation pipe; 120, one-way valve; 121, second fixed side platform; 122, second ventilation pipe; 123, drive shaft; 124, fixed inner ring platform; 125, water chamber; 126, isolation chamber; 127, piston arm; 128, first annular piston; 129, second annular piston; 130, fin; 131, crank arm ; 132, inner cavity disk; 133, disk groove; 134, inner cavity slide rod; 135, inner cavity push disk; 136, push spring; 137, closed piston; 138, ventilation straight pipe; 200, refrigerant external pipe assembly; 201, two-way external pipe; 202, handle; 203, agent outlet pipe; 204, agent inlet pipe; 205, locking end platform; 300, one-way locking assembly; 301, gear ring; 302, gear arm; 303 , locking arc plate; 304, geared wheel; 305, inner ring frame; 306, outer ring frame; 307, horizontal frame rod; 308, vertical frame rod; 309, reset spring; 310, reset seat cap; 311, driving column shaft; 312, first locking gear; 313, ratchet; 314, ratchet arm; 315, pressure spring; 316, second locking gear; 317, vertical shaft rod; 318, guide rail boss; 319, spiral guide rail groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 10As shown, the present invention provides a freezing refrigeration device for shield section freezing construction, including a freezing pipe assembly 100, wherein a refrigerant external pipe assembly 200 and a one-way locking assembly 300 are arranged at the end of the freezing pipe assembly 100, the refrigerant external pipe assembly 200 feeds refrigerant into the freezing pipe assembly 100 and the refrigerant external pipe assembly 200 is connected with an external refrigerant circulation device, and cooperates with the one-way locking of the one-way locking assembly 300. The refrigerant external pipe assembly 200 is installed at the end of the freezing pipe assembly 100 in a splicing and docking manner. As the refrigerant external pipe assembly 200 continues to feed refrigerant into the freezing pipe assembly 100, the inner cavity at the end of the freezing pipe assembly 100 forms a follow-up vacuum insulation and vacuum refrigeration protection structure.

[0029] In a preferred embodiment, please refer to Figure 3-Figure 7The freezing pipe assembly 100 includes a freezing bottom pipe 101, a joint end pipe 102 is fixedly arranged on the top of the freezing bottom pipe 101, an inner ring arm 108 and an inner seat inner platform 111 are fixedly arranged in the inner cavity of the joint end pipe 102, the inner ring arm 108 is located outside the inner seat inner platform 111, an inlet groove 112 and an outlet groove 110 are opened on the inner seat inner platform 111, a fixed inner ring platform 124 is fixedly arranged between the inner seat inner platform 111 and the joint end pipe 102, a second ventilation pipe 122 is arranged on the fixed inner ring platform 124 between the inner ring arm 108 and the joint end pipe 102, a second ventilation pipe 122 is also arranged on the fixed inner ring platform 124 between the inner seat inner platform 111 and the inner ring arm 108, and a first fixed side platform 117 is fixedly arranged on the outer wall of the joint end pipe 102 and a second fixed side platform 121, and an inner arm platform 118 is fixedly arranged on the inner wall of the joint end tube 102, a plurality of transverse grooves 115 and an arc groove 116 are opened on the top of the joint end tube 102, vertical grooves 114 are opened on the joint end tube 102 and the inner ring arm 108, a driving shaft 123 is rotatably arranged inside the joint end tube 102, and an air intake pipe 113 is fixedly arranged on both ends of the outer wall of the joint end tube 102, a first annular piston 128 and a second annular piston 129 are rotatably arranged on the driving shaft 123 through a crank arm 131 and a piston arm 127, a first ventilation pipe 119 is arranged on the first ventilation pipe 119 and the second ventilation pipe 122 are arranged on the driving shaft 1 The fin 130 is arranged on the top of the freezing bottom pipe 101, the air inlet pipe 113 is provided with a ventilation straight pipe 138 and an inner cavity disk 132 with a disk groove 133, an inner cavity slide rod 134 is slidably arranged on the inner cavity disk 132, a closed piston 137 and an inner cavity push disk 135 are fixedly arranged at both ends of the inner cavity slide rod 134, and a push spring 136 is sleeved on the inner cavity slide rod 134, a first circulation groove 103 and a second circulation groove 104 are opened inside the freezing bottom pipe 101, a first spiral guide plate 105 and a second spiral guide plate 106 are respectively arranged in the first circulation groove 103 and the second circulation groove 104, a first inner cavity 107 is formed between the inner ring arm 108 and the inner seat inner platform 111, a second inner cavity 109 is formed between the inner ring arm 108 and the joint end pipe 102, and a first inner cavity 109 is formed between the inner ring arm 108 and the joint end pipe 102. An isolation chamber 126 is formed between the platform 111, the inner ring arm 108 and the fixed inner ring platform 124, a water storage chamber 125 is formed between the joint end tube 102, the inner ring arm 108 and the fixed inner ring platform 124, the driving shaft 123 is rotatably connected with the inner seat inner platform 111, the inner ring arm 108 and the joint end tube 102, the fin 130 is located in the inlet groove 112, the second annular piston 129 moves up and down in the first inner cavity 107, the first annular piston 128 moves up and down in the second inner cavity 109, the second annular piston 129 and the first annular piston 128 are located above the fixed inner ring platform 124, one end of the push spring 136 abuts against the inner cavity disk 132, and the other end of the push spring 136 abuts against the inner cavity push disk 135, through the push of the push spring 136,The sealing piston 137 seals the disc groove 133, and the ventilation straight pipe 138 on one air inlet pipe 113 is inserted into the water storage chamber 125, and the ventilation straight pipe 138 on the other air inlet pipe 113 is inserted into the isolation chamber 126.

[0030] In a preferred embodiment, please refer to Figure 8 The refrigerant external pipe assembly 200 includes a two-way external pipe 201, a handle 202 and a locking end platform 205 are provided at the end of the two-way external pipe 201, and an inlet pipe 204 and an outlet pipe 203 are provided on the end surface of the two-way external pipe 201, a through groove is opened between the second circulation groove 104 and the first circulation groove 103, the outlet pipe 203 and the inlet pipe 204 are respectively inserted into the outlet groove 110 and the inlet groove 112, and the outlet pipe 203 and the inlet pipe 204 are opposite to the two second circulation grooves 104.

[0031] In a preferred embodiment, please refer to Fig. 9 and Fig.10 The one-way locking assembly 300 includes a geared ring 301 and a reset seat cap 310. The outer periphery of the geared ring 301 is meshed with a plurality of geared wheels 304. The top of the geared wheel 304 is meshed with a geared arm 302. A locking arc plate 303 is fixedly arranged at the front end of the geared arm 302. A first locking gear 312 is meshed with a second locking gear 316 at one end of the outer periphery of the geared ring 301. A ratchet 313 and a second locking gear 316 are fixedly arranged on the first locking gear 312 via a vertical shaft 317. The driving column shaft 311 is provided with a spiral guide rail groove 319, the inner wall of the reset seat cap 310 is fixedly provided with a guide rail protrusion 318, and the outer arm of the reset seat cap 310 is fixedly provided with a plurality of cross-frame rods 307 through the outer ring frame 306, the ends of the plurality of cross-frame rods 307 are fixedly provided with an inner ring frame 305, and the inner ring frame 305 is fixedly provided with a plurality of vertical frame rods 308, the ratchet 313 is in contact with the ratchet arm 314 through the top pressure spring 315, and the reset A return spring 309 is fixedly arranged at the bottom of the seat cap 310, the bottom of the gear ring 301 is rotatably arranged on the top surface of the inner ring arm 108, the gear wheel 304 is rotatably arranged on the inner arm platform 118, the ratchet arm 314, the second locking gear 316 and the first locking gear 312 are rotatably arranged on the first fixed side platform 117, the gear arm 302 slides in the horizontal groove 115, the horizontal frame rod 307 slides in the vertical groove 114, and the inner ring frame 305 is located in the first inner cavity 107. The reset seat cap 310 is sleeved on the outside of the driving column shaft 311, the guide rail boss 318 is inserted in the spiral guide rail groove 319, the bottom of the reset spring 309 is fixed on the second fixed side platform 121, and the two ends of the top pressure spring 315 are fixed on the ratchet arm 314 and the outer wall of the joint end tube 102, the locking end platform 205 is inserted in the first inner cavity 107, and the locking end platform 205 presses the vertical frame rod 308 downward, and the bottom of the locking arc plate 303 presses on the top of the locking end platform 205.

[0032] In summary, in actual use, the freezing pipe assembly 100 is inserted into the slot hole of the shield section freezing construction, and then the refrigerant external pipe assembly 200 is connected to the end of the freezing pipe assembly 100. At this time, the rear end of the refrigerant external pipe assembly 200 is connected to the external refrigerant circulation device, and the refrigerant circulation device circulates the refrigerant in the freezing pipe assembly 100 through the refrigerant external pipe assembly 200. Through the refrigeration of the freezing pipe assembly 100, the construction soil of the shield section is frozen and a hard frozen wall is formed. After freezing, a closed frozen soil curtain is formed near the hole. When the shield breaks the wall, the frozen soil curtain can withstand water and soil pressure to prevent soil collapse and surface subsidence. The refrigerant of the present invention circulates in the freezing bottom pipe 101. Specifically, the refrigerant circulates in the first circulation groove 103 and the second circulation groove 104. By setting the first spiral guide plate 105 and the second spiral guide plate 106, the refrigerant spirally guides and circulates. In this way, the residence time of the refrigerant in the freezing bottom pipe 101 is increased, thereby maximizing the freezing effect.

[0033] On the basis of the above, during the process of the refrigerant being fed into the freezing pipe assembly 100 through the refrigerant external pipe assembly 200, the high-pressure refrigerant passes through the impact fin 130 to realize the rotation of the driving shaft 123. When the driving shaft 123 rotates, the crank arm 131 drives the first annular piston 128 and the second annular piston 129 to reciprocate up and down in the second inner cavity 109 and the first inner cavity 107 through the piston arm 127. When the second annular piston 129 reciprocates up and down in the first inner cavity 107, the second annular piston 129 is set on the fixed inner ring platform 12 4, a second vent pipe 122 is arranged on the fixed inner ring stage 124, and a one-way valve is arranged on the second vent pipe 122, which only allows the gas in the isolation chamber 126 to enter the first inner chamber 107, and the one-way valve on the second annular piston 129 only allows the gas below the second annular piston 129 to be discharged to the top of the first inner chamber 107, that is, when the second annular piston 129 reciprocates in the first inner chamber 107, the isolation chamber 126 will be evacuated, and a vacuum will be formed in the isolation chamber 126, and a vacuum will be formed at the periphery of the end. By this vacuum, the conduction of heat is blocked, and the loss of cold air at the joint of the freezing pipe assembly 100 and the refrigerant external pipe assembly 200 can be reduced. At the same time, when the first annular piston 128 of the present invention reciprocates up and down in the second inner cavity 109, the first annular piston 128 performs a vacuum treatment on the water holding cavity 125. It should be emphasized that the water holding cavity 125 of the present invention contains water. In order to facilitate the addition of water, a water adding pipe with a cover is provided on one side of the water holding cavity 125. When a vacuum is formed in the water holding cavity 125, the greater the vacuum degree, the water in the water holding cavity 125 will be under vacuum. , the boiling point is lowered, and with the occurrence of vacuum, the water in the water chamber 125 evaporates at a low temperature. At this time, evaporation absorbs heat, and a cold storage protection layer is formed on the periphery of the isolation chamber 126, further forming a cold storage protection for the joint of the freezing pipe assembly 100 and the refrigerant external pipe assembly 200 to prevent the loss of cold air. In simple terms, the vacuum protection layer and the cold storage protection layer are formed in accompaniment during the refrigerant delivery process. This formation does not require the aid of external force, and forms a double-layer protection for the joint of the freezing pipe assembly 100 and the refrigerant external pipe assembly 200 to further prevent energy loss at the joint.

[0034] On the basis of the above, the vacuum protection layer and the refrigeration protection layer are formed as the fins 130 rotate. In order to avoid affecting the rotation of the fins 130, that is, if the vacuum degree in the isolation chamber 126 and the water chamber 125 is too large, the fins 130 will hinder the refrigerant from being delivered. At this time, the isolation chamber 126 and the water chamber 125 of the present invention are respectively connected to the air inlet pipe 113. When the vacuum degree of the isolation chamber 126 and the water chamber 125 reaches the rated value, the negative pressure adsorbs the sealed piston 137 and drives the sealed piston 137 to move backward in the air inlet pipe 113. At this time, the sealed piston 137 releases the blockage of the disc groove 133. At this time, the external air is replenished in the isolation chamber 126 and the water chamber 125. In this way, the isolation chamber 126 and the water chamber 125 are prevented from being too large in vacuum, which affects the rotation of the fins 130, thereby preventing the refrigerant from being affected by the fins 130 and delivering it into the freezing bottom tube 101.

[0035] On the basis of the above, when the refrigerant external pipe assembly 200 of the present invention is installed between the freezing pipe assembly 100, the outlet pipe 203 and the inlet pipe 204 at one end of the double-way external pipe 201 are respectively inserted into the outlet groove 110 and the inlet groove 112, and the insertion and pressing continue. At this time, the locking end platform 205 moves downward in the first inner cavity 107, and the bottom end of the locking end platform 205 faces the vertical frame rod 308 to form a downward pressing pressure. When the vertical frame rod 308 moves downward, it drives the reset seat cap 310 to move downward outside the driving column shaft 311. During the downward movement, through the cooperation of the guide rail protrusion 318 and the spiral guide rail groove 319, the vertical shaft rod 317 rotates on the first fixed side platform 117. At this time, the rotation of the vertical shaft rod 317 drives the first locking gear 312 rotates, the first locking gear 312 drives the geared ring 301 to rotate through the second locking gear 316, the geared ring 301 drives the geared wheel 304 to rotate, and the geared wheel 304 forms an inward pulling force on the geared arm 302. When the refrigerant external pipe assembly 200 is assembled and docked at the end of the freezing pipe assembly 100, the multiple geared arms 302 drive the multiple locking arc plates 303 to move to the top of the locking end platform 205. At this time, the refrigerant external pipe assembly 200 and the freezing pipe assembly 100 are assembled and docked. In simple terms, the refrigerant external pipe assembly 200 only needs to be continuously docked and pressed at the port of the freezing pipe assembly 100 to achieve the connection and docking of the ports of the freezing pipe assembly 100 and the refrigerant external pipe assembly 200.

[0036] On the basis of the above, the present invention is provided with a ratchet 313 on the top of the first locking gear 312, and a ratchet arm 314 cooperating therewith is provided on one side of the ratchet 313. Through the cooperation of the ratchet 313 and the ratchet arm 314, the first locking gear 312 can only rotate in one direction, that is, only the gear arm 302 can be pushed inward, that is, when the refrigerant external pipe assembly 200 is pressed and docked at the freezing pipe assembly 100, at this time, multiple gear arms 302 drive multiple locking arc plates 303 to push inward toward the top of the locking end platform 205. This pushing is a unidirectional action when the freezing pipe assembly 100 and the refrigerant external pipe assembly 200 are spliced ​​at the port, that is, when the freezing pipe assembly 100 and the refrigerant external pipe assembly 200 are spliced ​​at the port, this inward pushing movement is a unidirectional action, that is, it is ensured that when the freezing pipe assembly 100 and the refrigerant external pipe assembly 200 are docked in place, the reliability and convenience of the docking installation of the freezing pipe assembly 100 and the refrigerant external pipe assembly 200 can be achieved through the unidirectional locking of the unidirectional locking assembly 300.

[0037] In another embodiment of the present invention, the space of the isolation chamber 126 and the water storage chamber 125 can be set larger, so as to optimally wrap the ends of the joint end pipe 102 and the two-way external pipe 201.

[0038] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A freezing refrigeration device for shield tunneling section freezing construction, comprising a freezing pipe assembly (100), characterized in that: The end of the freezing pipe assembly (100) is provided with a refrigerant external pipe assembly (200) and a one-way locking assembly (300); the refrigerant external pipe assembly (200) feeds refrigerant into the freezing pipe assembly (100) and the refrigerant external pipe assembly (200) is connected to an external refrigerant circulation device; in conjunction with the one-way locking of the one-way locking assembly (300), the refrigerant external pipe assembly (200) is butt-jointed and installed at the end of the freezing pipe assembly (100); as the refrigerant external pipe assembly (200) continues to feed refrigerant into the freezing pipe assembly (100), the inner cavity of the end of the freezing pipe assembly (100) forms a follow-up vacuum insulation and vacuum refrigeration protection structure; The freezing pipe assembly (100) comprises a freezing bottom pipe (101), a joint end pipe (102) is fixedly arranged on the top of the freezing bottom pipe (101), an inner ring arm (108) and an inner seat inner platform (111) are fixedly arranged in the inner cavity of the joint end pipe (102), the inner ring arm (108) is located outside the inner seat inner platform (111), an inlet groove (112) and an outlet groove (110) are opened on the inner seat inner platform (111), a fixed inner ring platform (124) is fixedly arranged between the inner seat inner platform (111) and the joint end pipe (102), a second ventilation pipe (122) is arranged on the fixed inner ring platform (124) located between the inner ring arm (108) and the joint end pipe (102), and a second ventilation pipe (122) is arranged on the inner seat inner platform A second ventilation pipe (122) is also provided on the fixed inner ring platform (124) between the joint end tube (102) and the inner ring arm (108); a first fixed side platform (117) and a second fixed side platform (121) are fixedly provided on the outer wall of the joint end tube (102); an inner arm platform (118) is fixedly provided on the inner wall of the joint end tube (102); a plurality of transverse grooves (115) and an arc groove (116) are provided on the top of the joint end tube (102); vertical grooves (114) are provided on the joint end tube (102) and the inner ring arm (108); a driving shaft (123) is rotatably provided inside the joint end tube (102); and air intake pipes (113) are fixedly provided at both ends of the outer wall of the joint end tube (102); A first annular piston (128) and a second annular piston (129) are rotatably provided on the rod (123) via a crank arm (131) and a piston arm (127); the bottoms of a plurality of piston arms (127) are rotatably connected to the first annular piston (128) and the second annular piston (129); the tops of a plurality of piston arms (127) are rotatably connected to the crank arm (131); a first ventilation pipe (119) is provided on the first annular piston (128) and the second annular piston (129); a one-way valve (120) is provided on the first ventilation pipe (119) and the second ventilation pipe (122); a fin (130) is provided on the drive shaft (123); and a ventilation straight pipe is provided on the intake pipe (113). (138) and an inner cavity disk (132) with a disk groove (133), an inner cavity slide rod (134) is slidably arranged on the inner cavity disk (132), a sealed piston (137) and an inner cavity push disk (135) are fixedly arranged at both ends of the inner cavity slide rod (134), and a push spring (136) is sleeved on the inner cavity slide rod (134), a first circulation groove (103) and a second circulation groove (104) are opened inside the freezing bottom pipe (101), a first spiral guide plate (105) and a second spiral guide plate (106) are respectively arranged in the first circulation groove (103) and the second circulation groove (104), a first inner cavity (107) is formed between the inner ring arm (108) and the inner seat inner platform (111),A second inner cavity (109) is formed between the inner ring arm (108) and the joint end tube (102); an isolation cavity (126) is formed between the inner seat inner platform (111), the inner ring arm (108) and the fixed inner ring platform (124); and a water storage cavity (125) is formed between the joint end tube (102), the inner ring arm (108) and the fixed inner ring platform (124); The driving shaft (123) is rotatably connected to the inner seat inner platform (111), the inner ring arm (108) and the joint end tube (102); the fin (130) is located in the inlet groove (112); the second annular piston (129) moves up and down in the first inner cavity (107); the first annular piston (128) moves up and down in the second inner cavity (109); the second annular piston (129) and the first annular piston (128) are located above the fixed inner ring platform (124); One end of the push spring (136) abuts against the inner cavity disk (132), and the other end of the push spring (136) abuts against the inner cavity push disk (135). Through the pushing of the push spring (136), the sealing piston (137) seals the disk groove (133), and the ventilation straight pipe (138) on one of the air inlet pipes (113) is inserted into the water storage cavity (125), and the ventilation straight pipe (138) on the other air inlet pipe (113) is inserted into the isolation cavity (126).

2. A freezing refrigeration device for shield section freezing construction according to claim 1, characterized in that: The refrigerant external pipe assembly (200) comprises a two-way external pipe (201), the end of the two-way external pipe (201) being provided with a handle (202) and a locking end platform (205), and the end surface of the two-way external pipe (201) being provided with a feed pipe (204) and a discharge pipe (203); The one-way locking assembly (300) comprises a geared ring (301) and a reset seat cap (310); a plurality of geared wheels (304) are gearedly arranged on the periphery of the geared ring (301); the top of the geared wheel (304) is gearedly arranged with a geared arm (302); a locking arc plate (303) is fixedly arranged at the front end of the geared arm (302); a first locking gear (312) is gearedly arranged on one end of the periphery of the geared ring (301) via a second locking gear (316); a ratchet (313) and a driving column shaft (311) are fixedly arranged on the first locking gear (312) via a vertical shaft (317); A spiral guide rail groove (319) is provided on the movable column shaft (311), a guide rail boss (318) is fixedly provided on the inner wall of the reset seat cap (310), and a plurality of cross-frame rods (307) are fixedly provided on the outer arm of the reset seat cap (310) through an outer ring frame (306), an inner ring frame (305) is fixedly provided at the ends of the plurality of cross-frame rods (307), a plurality of vertical frame rods (308) are fixedly provided on the inner ring frame (305), the ratchet wheel (313) is in contact and meshing engagement with the ratchet arm (314) via a pressure spring (315), and a reset spring (309) is fixedly provided at the bottom of the reset seat cap (310).

3. A freezing refrigeration device for shield section freezing construction according to claim 2, characterized in that: A through groove is provided between the second circulation groove (104) and the first circulation groove (103); the drug outlet pipe (203) and the drug inlet pipe (204) are respectively inserted into the outlet groove (110) and the inlet groove (112); and the drug outlet pipe (203) and the drug inlet pipe (204) are directly opposite to the two second circulation grooves (104).

4. A freezing refrigeration device for shield section freezing construction according to claim 2, characterized in that: The bottom of the geared ring (301) is rotatably mounted on the top surface of the inner ring arm (108); the geared wheel (304) is rotatably mounted on the inner arm platform (118); the ratchet arm (314), the second locking gear (316) and the first locking gear (312) are rotatably mounted on the first fixed side platform (117); the geared arm (302) slides in the horizontal groove (115); the horizontal frame rod (307) slides in the vertical groove (114); and the inner ring frame (305) is located in the first inner cavity (107).

5. A freezing refrigeration device for shield section freezing construction according to claim 2, characterized in that: The reset seat cap (310) is sleeved on the outside of the driving column shaft (311), the guide rail boss (318) is inserted into the spiral guide rail groove (319), the bottom of the reset spring (309) is fixed on the second fixed side platform (121), and the two ends of the top pressure spring (315) are fixed on the ratchet arm (314) and the outer wall of the joint end tube (102).

6. A freezing refrigeration device for shield section freezing construction according to claim 2, characterized in that: The locking end platform (205) is inserted into the first inner cavity (107), and the locking end platform (205) presses downward against the vertical frame rod (308), and the bottom of the locking arc plate (303) presses against the top of the locking end platform (205).

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