A kind of assembly type building structure connection device

By using an automated grouting and sealing device in prefabricated buildings, the grouting port and slurry outlet are automatically sealed using the pressure of grouting materials, and the overflowing grouting materials are collected, the problems of low construction efficiency and waste of resources are solved, and high efficiency is achieved construction and resource conservation.

CN118728004BActive Publication Date: 2024-12-31YIXIN CONSTR GRP CO LTD
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Patent Information

Application Number
CN202411228679.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-03
Publication Date
2024-12-31
Estimated Expiration
2044-09-03

AI Technical Summary

Technical Problem

In prefabricated buildings, the grouting sleeve sealing the grouting holes after grouting is grouting, resulting in low construction efficiency and inability to effectively collect and utilize grouting materials, wasting resources.

Method used

A device including a grouting sleeve, rubber plug and grouting sealing equipment is designed. The rubber plug is automatically pushed to seal the grouting port and slurry outlet through the pressure of grouting material circulation, and collect overflowing grouting material through the discharge pipe to achieve Automatic blockade and resource conservation.

Benefits of technology

It improves construction efficiency, reduces the need for manual sealing, realizes effective collection and reuse of grouting materials, and saves resources.

✦ Generated by Eureka AI based on patent content.

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    Figure CN118728004B_ABST
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Abstract

The present invention relates to the field of building structure connection, and in particular to an assembled building structure connection device. Aiming at the problem that blocking grouting outlets one by one in the prior art easily delays the construction process and is not conducive to saving resources, an assembled building structure connection device is proposed, wherein the lower side and the upper side of the surface of a grouting sleeve are respectively provided with a grouting port and a grouting outlet, and the grouting port and the grouting outlet are detachably connected to a grouting plugging device. When in use, the device can be connected through a connecting pipe, thereby simultaneously assisting multiple grouting sleeves to perform grouting, and automatically plugging the grouting ports and grouting outlets of multiple grouting sleeves, which can fully save manpower and effectively improve construction efficiency; the discharge pipe can be connected to a pipeline to collect overflowed grouting material to avoid waste, and the grouting material can be collected and placed back in a grouting machine for use, thereby saving resources.
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Description

Technical Field

[0001] The invention relates to the field of building structure component connection, and in particular to an assembled building structure component connection device. Background Art

[0002] As a product of the rapid development of modern industry and construction industry, prefabricated buildings have been rapidly promoted and developed in the process of practical application with its advantages of short construction time, high construction efficiency, low production level and high efficiency. At present, it has gradually replaced the traditional construction method and become a common construction method in modern construction. Prefabricated buildings are processed and manufactured in the factory. The building components and accessories are transported to the construction site and assembled and installed on site through reliable connection methods. It has a very high construction efficiency. At present, the assembly and connection of prefabricated parts are mainly carried out through grouting sleeves. Then, by using a grouting machine, grouting material is injected into the grouting port of the grouting sleeve. When the grouting material is discharged through the outlet, the grouting of the grouting sleeve is completed, so that the steel bars between the prefabricated parts are connected, which well solves the problem of longitudinal steel bar connection in the prefabricated structure and can effectively achieve the design requirement of "assembly equivalent to cast-in-place". At present, the grouting outlet holes need to be blocked after grouting the grouting sleeve. When grouting multiple grouting sleeves at one time, they need to be blocked one by one, which can easily delay the construction progress. In addition, the grouting material flowing out of the outlet during grouting cannot be collected and utilized, which is not conducive to saving resources. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a prefabricated building structural member connection device, which effectively solves the problems mentioned in the above background technology.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is:

[0005] An assembled building structural member connection device comprises a grouting sleeve and a rubber plug, wherein a grouting port and a grouting outlet are respectively arranged on the lower side and the upper side of the grouting sleeve surface, and the grouting port and the grouting outlet are detachably connected to a grouting plugging device;

[0006] The grouting plugging device includes two upper and lower installation tubes, the installation tubes are fixedly connected and connected to a receiving tube, a spring push assembly is installed inside the receiving tube, and a placement space for placing multiple rubber plugs is formed between the spring push assembly and the installation tubes on both sides;

[0007] The interior of the mounting tube is slidably connected with a displacement cylinder that can move forward and backward, a differential reset structure that can control the differential reset of the two displacement cylinders is installed between the upper and lower displacement cylinders, the rear ends of the displacement cylinders are fixedly connected with duckbill valves, a force storage spring is connected between the front end of the displacement cylinder and the mounting tube, a rectangular opening for entering the rubber plug is opened on the surface of the displacement cylinder, after the displacement cylinder moves forward so that the rectangular opening corresponds to the rubber plug, the rubber plug enters the displacement cylinder through the rectangular opening under the push of the spring push assembly, the interior of the displacement cylinder is slidably connected with a push rod that can only move axially, when the displacement cylinder moves forward, a structure can be formed in which the push rod moves forward inside the displacement cylinder, and the rubber plug entering the displacement cylinder is located at the rear side of the push rod;

[0008] The lower side of the upper installation pipe is connected to a discharge pipe, and the lower side of the lower installation pipe is connected to a feed pipe. The discharge pipe and the feed pipe can be opened alternately, and exhaust valves are respectively installed on the surfaces of the upper and lower installation pipes.

[0009] Preferably, the spring pushing assembly includes pushing springs located on the upper and lower sides of the accommodating tube, the inner ends of the two pushing springs are fixedly connected to a partition, the partition is fixedly connected to the inner wall of the accommodating tube, the outer ends of the two pushing springs are respectively fixedly connected to push plates, the push plates are respectively slidably connected to the inner walls of the accommodating tube, and the rubber plugs are respectively kept coaxially arranged with the mounting tube and vertically arranged at the outer ends of the two push plates.

[0010] Preferably, a rotating cylinder is rotatably connected to the front side of the displacement cylinder, a guide rod is provided at the front end of the displacement cylinder, the guide rod is fixedly connected to the inner wall of the mounting tube, mounting holes are respectively provided at the front and rear ends of the rotating cylinder, and the rotating cylinder is respectively sleeved on the push rod and the surface of the guide rod through the mounting holes at both ends; a second spiral groove is provided on the surface of the guide rod, and a second pin is fixedly connected to the inner wall of the mounting hole at the front end of the rotating cylinder, and the second pin is meshed with the second spiral groove, so that when the displacement cylinder moves to the front side, the engagement of the second pin with the second spiral groove can drive the rotating cylinder to rotate inside the displacement cylinder;

[0011] The front end of the push rod is fixedly connected with a matching plate, the circumferential surface of the matching plate is fixedly connected with a first pin shaft, and the first pin shaft is meshed with the first spiral groove.

[0012] Preferably, the lower side of the mounting tube is respectively fixedly connected and connected with a matching tube, the feed tube and the discharge tube are respectively fixedly connected and connected with the matching tube, the inside of the matching tube is respectively axially slidably connected with a valve core that can move up and down, the lower ends of the two valve cores are respectively fixedly connected with a vertically arranged follower plate, the follower plate is slidably connected with the matching tube, and when the upper valve core is blocked at the connection between the discharge tube and the matching tube, the lower valve core is located at the lower side of the connection between the feed tube and the matching tube.

[0013] Preferably, the corresponding ends of the two driven plates are respectively fixedly connected with driven racks, a reversing gear is respectively meshed between the two driven racks, the reversing gear is rotationally connected to the surface of the accommodating tube, and a shift plate is fixedly connected to the front end surface of the upper driven plate.

[0014] Preferably, a transmission shaft is fixedly connected to the middle part of the reversing gear, the front end of the transmission shaft is rotatably connected to the surface of the accommodating tube, a swing plate is fixedly connected to the surface of the transmission shaft and a limit plate is rotatably connected, the front end of the limit plate is fixedly connected to the surface of the accommodating tube, a groove is provided at the front end of the limit plate, an arc groove connected to the groove is coaxially provided at the rear end of the limit plate, a third pin is fixedly connected to the upper end of the swing plate, the third pin is slidably matched with the arc groove, a tension spring is arranged inside the groove, one end of the tension spring is fixedly connected to the third pin, and the other end is fixedly connected to the center lower side of the limit plate.

[0015] Preferably, a protective box is fixedly connected to the surface of the accommodating tube, a coil spring is arranged inside the protective box, one end of the coil spring is fixedly connected to the inner wall of the protective box, the inner end of the coil spring is fixedly connected to a connecting shaft, the connecting shaft is coaxially rotatably connected to the protective box, a winding wheel is fixedly connected to the surface of the connecting shaft at the rear end of the protective box, a cam is coaxially fixedly connected to the rear end of the winding wheel, a protrusion is fixedly connected to the lower end of the upper driven plate, the protrusion is slidably fitted on the lower side of the cam, a connecting rope is wound around the surface of the winding wheel, one end of the connecting rope is fixedly connected to the winding wheel, and the other end is fixedly connected to the push plate on the lower side.

[0016] Preferably, the differential reset structure comprises a mounting plate fixedly connected to the surface of the accommodation tube, the mounting plate is located between the two displacement cylinders, the corresponding surfaces of the upper and lower displacement cylinders are respectively fixedly connected with connecting plates, the connecting plates are respectively slidably connected to the surface of the mounting tube, and the inner ends of the two connecting plates are respectively slidably connected to the mounting plate;

[0017] The lower sides of the left and right ends of the upper connecting plate are respectively fixedly connected with ratchet blocks, and the left and right sides of the upper end of the mounting plate are respectively slidably connected with ratchet bars that can move outward, and the outer ends of the ratchet bars are respectively fixedly connected with first return springs, and the outer ends of the first return springs are respectively fixedly connected with the mounting plates, and the ratchet bars mesh with the ratchet blocks under the push of the first return springs, and the rear sides of the two ratchet bars are respectively fixedly connected with linking plates corresponding to the lower connecting plate, and the lower connecting plate drives the ratchet bars on both sides to move outward and disengage from the ratchet blocks by pushing the linking plate; an inclined surface is provided at one end of the linking plate corresponding to the connecting plate at the lower side.

[0018] Preferably, the surface of the accommodating tube is provided with movable grooves along the moving direction of the push plate, the inner walls of the movable grooves are slidably connected with auxiliary plates, the auxiliary plates are fixedly connected to the corresponding push plates, and the outer ends of the two movable grooves are provided with filling ports, and the rubber plug enters the interior of the accommodating tube through the filling ports.

[0019] Preferably, the exhaust valve includes a valve cylinder fixedly connected to the surface of the mounting tube and connected to the mounting tube, the valve cylinder and the matching cylinder are coaxially arranged, a hemispherical opening is opened at one end of the valve cylinder facing the inside of the mounting tube, a floating block is coaxially arranged at the hemispherical opening, a gap for ventilation is formed between the floating block and the inner wall of the hemispherical opening, a valve stem is coaxially arranged inside the valve cylinder, one end of the valve stem is fixedly connected to the floating block, the outer end of the valve stem is fixedly connected to a control plate, the control plate is located on the outside of the valve cylinder, the surface of the valve stem located inside the valve cylinder is respectively sleeved with a second reset spring, and the two ends of the second reset spring are respectively fixedly connected to the floating block and the inner wall of the valve cylinder.

[0020] The present invention has novel structure, ingenious design, simple and convenient operation, and has the following advantages compared with the prior art:

[0021] 1. When in use, the device can be connected to the grouting port and the grouting outlet of the grouting sleeve, and the pressure of the grouting material flowing through the grouting material is used to store force for the force storage spring, and then after the grouting sleeve is filled with grouting material, the rubber plug is automatically pushed into the grouting port and the grouting outlet in turn, so as to automatically block the grouting port and the grouting outlet after the grouting inside the grouting sleeve is completed, without the need for manual blocking by construction personnel;

[0022] 2. When in use, the device can be connected through a connecting pipe to simultaneously assist multiple grouting sleeves in grouting, and automatically block the grouting ports and grouting outlets of multiple grouting sleeves, which can fully save manpower and effectively improve construction efficiency;

[0023] 3. The discharge pipe can be connected to the pipeline to collect the overflowed grouting material to avoid waste. It can be collected and placed back into the grouting machine for use to save resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of the overall structure of an assembled building structural member connection device of the present invention.

[0025] Figure 2 The present invention is a schematic diagram of the combined structure of a prefabricated building structural member connection device.

[0026] Figure 3 The present invention is a schematic cross-sectional view of the internal structure of an installation tube and a receiving tube of an assembled building structure connection device.

[0027] Figure 4The present invention is a schematic cross-sectional view of the internal structure of a displacement tube of a prefabricated building structural member connection device.

[0028] Figure 5 The present invention is a schematic diagram of a push rod pushing structure of an assembled building structural component connection device.

[0029] Figure 6 The present invention is a schematic diagram of the connection structure between a connection plate and a mounting plate of an assembled building structure connection device.

[0030] Figure 7 The present invention is a schematic diagram of the meshing structure of a ratchet block and a ratchet bar of a prefabricated building structure connection device.

[0031] Figure 8 The present invention is a schematic diagram of the matching structure of a linkage plate and a connection plate of an assembled building structure connection device.

[0032] Fig. 9 The present invention is a schematic diagram of a valve core installation structure of an assembled building structural component connection device.

[0033] Fig.10 The present invention is a schematic diagram of a tension spring installation structure of an assembled building structural component connection device.

[0034] Fig.11 The present invention is a schematic diagram of the cam and protrusion matching structure of an assembled building structure connection device.

[0035] Fig.12 This is a first schematic diagram of the structure of an air release valve of an assembled building structural component connection device of the present invention.

[0036] Fig.13 This is a second schematic diagram of the air release valve structure of an assembled building structural component connection device of the present invention.

[0037] Numbers in the figure: 1-grouting sleeve, 2-grouting pipe, 3-grouting pipe, 4-installation pipe, 5-accommodating pipe, 6-filling port, 7-moving groove, 8-feeding pipe, 9-discharging pipe, 10-connecting pipe, 12-push plate, 13-pushing spring, 14-rubber plug, 15-displacement cylinder, 16-duckbill valve, 17-exhaust valve, 18-connecting ring, 19-guide rod, 20-storage spring, 21-rectangular opening, 22-push rod, 23-matching plate, 24-rotating cylinder, 25-first pin shaft, 26-auxiliary spring, 27-gasket, 28-limiting plate, 29-first spiral groove, 30-second pin shaft, 31-second spiral groove , 32-connecting plate, 33-mounting plate, 34-ratchet bar, 35-ratchet block, 36-mounting slider, 37-first return spring, 38-linking plate, 39-valve core, 41-driven plate, 42-driven rack, 43-reversing gear, 44-transmission shaft, 45-limit plate, 46-swing plate, 47-arc groove, 48-third pin shaft, 49-tension spring, 50-bump, 51-cam, 52-winding wheel, 53-connecting rope, 54-coil spring, 55-protective box, 56-valve cylinder, 57-floating block, 58-valve stem, 59-control plate, 60-second return spring, 61-vent, 63-support plate. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0039] like Figure 1-13 As shown, the present invention provides a prefabricated building structure connection device, including a grouting sleeve 1 and a rubber plug 14. The lower side and the upper side of the surface of the grouting sleeve 1 are respectively provided with a grouting port and a grouting outlet. The grouting port is a grouting pipe 3 of a tubular structure, and the grouting outlet is a grouting outlet 2 of a tubular structure. The grouting port and the grouting outlet are detachably connected to a grouting plugging device; the grouting plugging device is connected to a grouting machine, and the grouting material enters the grouting sleeve 1 through the grouting plugging device. After the grouting is completed, the grouting port and the grouting outlet can be automatically blocked, and the construction personnel do not need to manually block them one by one, thereby saving construction time. Figure 2 As shown, multiple grouting and plugging devices can be connected through the connecting pipe 10, thereby simultaneously assisting multiple grouting sleeves in grouting, and automatically plugging the grouting ports and grout outlets of multiple grouting sleeves 1, which can fully save manpower and effectively improve construction efficiency;

[0040] The grouting plugging device includes two upper and lower mounting tubes 4, and the surfaces of the two mounting tubes 4 are respectively fixedly connected with support plates 63, which are used to connect the two mounting tubes 4 and support the device to improve the stability of the device when in use. The mounting tubes 4 are fixedly connected and connected with a receiving tube 5, and a spring push component is installed inside the receiving tube 5. A placement space for placing multiple rubber plugs 14 is formed between the spring push component and the mounting tubes 4 on both sides;

[0041] The interior of the mounting tube 4 is slidably connected with a displacement cylinder 15 that can move forward and backward. A differential reset structure that can control the differential reset of the two displacement cylinders 15 is installed between the upper and lower displacement cylinders 15. The rear ends of the displacement cylinders 15 are fixedly connected with duckbill valves 16. The duckbill valves 16 have the effect of a one-way valve. Fluid from the outside cannot enter the duckbill valves 16. The rubber plug 14 can protrude to the outside of the duckbill valve 16 under the push of the push rod 22. When the rubber plug 14 is separated from the duckbill valve 16, the duckbill valve 16 is closed again, and the front end of the displacement cylinder 15 is connected to the mounting tube 4. A force storage spring 20 is connected therebetween, and a rectangular opening 21 for entering the rubber plug 14 is provided on the surface of the displacement cylinder 15. After the displacement cylinder 15 moves forward to make the rectangular opening 21 correspond to the rubber plug 14, the rubber plug 14 enters the displacement cylinder 15 through the rectangular opening 21 under the push of the spring push assembly. A push rod 22 that can only move axially is slidably connected inside the displacement cylinder 15. When the displacement cylinder 15 moves forward, a structure in which the push rod 22 moves forward inside the displacement cylinder 15 can be formed, and the rubber plug 14 entering the displacement cylinder 15 is located at the rear side of the push rod 22.

[0042] The lower side of the upper mounting tube 4 is connected to a discharge tube 9, and the lower side of the lower mounting tube 4 is connected to a feed tube 8. The discharge tube 9 and the feed tube 8 can be opened alternately. Exhaust valves 17 are respectively installed on the surfaces of the upper and lower mounting tubes 4. In the initial state, the feed tube 8 is in an open state, and the discharge tube 9 is in a closed state. When the device is in use, the feed tube 8 is connected to the grouting machine, and the grouting material can enter the lower mounting tube 4 through the feed tube 8. Under the obstruction of the duckbill valve 16, the grouting material cannot penetrate into the lower mounting tube 4, and can only enter the grouting sleeve 1, and enter the upper mounting tube 4 after filling the grouting sleeve 1. The grouting material acts as a fluid in the grouting sleeve 1 and the mounting tube 4. During internal circulation, the gas is discharged through the exhaust valve 17 to avoid the force of the formed air pressure on the displacement cylinder 15. The exhaust valve 17 can only discharge the gas, and the grouting material cannot be discharged through the exhaust valve 17; after the grouting material enters the upper installation tube 4, the thrust of the grouting material fluid gradually increases under the obstruction of the duckbill valve 16 on the upper side. The fluid cannot enter the displacement cylinder 15 under the obstruction of the duckbill valve 16, and will push the displacement cylinder 15 to move forward inside the installation tube 4, and squeeze the storage spring 20 through the displacement cylinder 15. In the process of the displacement cylinder 15 moving, the rectangular opening 21 gradually corresponds to the openings at both ends of the accommodating tube 5, so that the rubber plug 14 enters the displacement cylinder 15 under the push of the spring push component;

[0043] When the displacement cylinder 15 is moving, the push rod 22 is also moving inside the displacement cylinder 15. The push rod 22 is used as a driving force to push the rubber plug 14 away from the mounting tube 4. When the rubber plug 14 enters the displacement cylinder 15, the feed pipe 8 is controlled to be closed and the discharge pipe 9 is opened. When the discharge pipe 9 is opened, the fluid is discharged, and the excess grouting material fluid in the grouting sleeve 1 flows out through the discharge pipe 9. The pressure inside the grouting sleeve 1 disappears, and the displacement cylinder 15 is reset under the push of the storage spring 20. Under the control of the differential reset structure, the displacement cylinder 15 located at the lower side first moves backward and resets under the push of the storage spring 20, and after the reset, the internal rubber plug 14 protrudes the duckbill valve 16 under the push of the push rod 22, and is inserted into the grouting pipe 3 of the grouting sleeve 1 under the push of the push rod 22. When the rubber plug 14 is inserted into the grouting pipe 3 of the grouting sleeve 1, it can also push part of the grouting material entering the installation pipe 4 to flow out through the discharge pipe 9 to avoid condensation in the installation pipe 4. After the displacement cylinder 15 is reset, the upper displacement cylinder 15 starts to move backward and reset. After the upper displacement cylinder 15 is reset, the internal rubber plug 14 also protrudes the duckbill valve 16 under the push of the push rod 22 and is plugged into the slurry outlet pipe 2. During the movement of the rubber plug 14, the excess grouting material in the upper mounting pipe 4 can also overflow through the discharge pipe 9 under pressure, and it is convenient for the rubber plug 14 to enter the slurry outlet pipe 2. The diameters of the two ends of the rubber plug 14 are small, and the slurry outlet pipe 2 is just opened when the rubber plug 14 enters the slurry outlet pipe 2. Excessive grouting material inside can overflow through the gap formed between the end of the rubber plug 14 and the inner wall of the grouting pipe 2, and reduce the fluid pressure inside the grouting sleeve 1, so that enough space for the rubber plug 14 to enter the grouting pipe 2 is flowed out, and then the grouting pipe 2 is fully blocked after the rubber plug 14 is inserted into the grouting pipe 2; the duckbill valve 16 is opened during the movement of the rubber plug 14, so the grouting material can only enter the grouting sleeve 1 under the push of the rubber plug 14, and cannot enter the displacement tube 15;

[0044] The device accumulates force in the force storage spring 20 through the fluid pressure of the grouting material, and under the control of the differential reset structure, the displacement cylinder 15 is alternately reset under the push of the force storage spring 20, and the rubber plug 14 is pushed by the push rod 22 to first block the grouting pipe 3, and then block the grouting pipe 2. The excess grouting material can overflow through the discharge pipe 9 under the squeezing of the rubber plug 14, which plays a role in automatically blocking the grouting port and the grouting port of the grouting sleeve 1 after the grouting of the grouting sleeve 1 is completed. The use is simple and convenient, and can effectively improve the work efficiency. The discharge pipe 9 can be connected to the pipeline to collect the overflowed grouting material to avoid waste. The grouting material can be collected and placed in the grouting machine for use, saving resources; the ends of the installation pipe 4 connected to the grouting pipe 2 and the grouting pipe 3 are rotatably connected with the connecting ring 18, and the surfaces of the grouting pipe 2 and the grouting pipe 3 are respectively provided with threads, and the inner wall of the connecting ring 18 is provided with internal threads, which are respectively connected to the grouting pipe 2 and the grouting pipe 3 by threads through the internal threads, which are convenient for installation and disassembly.

[0045] The spring push assembly includes a push spring 13 located on the upper and lower sides of the accommodating tube 5. The inner ends of the two push springs 13 are fixedly connected to a partition, which is fixedly connected to the inner wall of the accommodating tube 5. The outer ends of the two push springs 13 are respectively fixedly connected to push plates 12, which are respectively slidably connected to the inner walls of the accommodating tube 5. When the rubber plug 14 enters the accommodating tube 5, the push plate 12 can be pushed to move inward and squeeze the push spring 13, so that the push spring 13 is in a force storage state. The rubber plugs 14 are respectively kept coaxially arranged with the mounting tube 4 and vertically arranged at the outer ends of the two push plates 12. When the rubber plug 14 is placed in the accommodating tube 5, the surface of the displacement tube 15 acts as a barrier. When the rectangular opening 21 is aligned with the two end openings of the accommodating tube 5, the rubber plug 14 located on the upper side can enter the displacement tube 15 under the push of the push spring 13, providing a blockage for blocking the grouting port and the slurry outlet.

[0046] like Figure 4 and Figure 5As shown, the front side of the displacement cylinder 15 is rotatably connected to a rotating cylinder 24, a guide rod 19 is provided at the front end of the displacement cylinder 15, and the guide rod 19 is fixedly connected to the inner wall of the mounting tube 4. The front and rear ends of the rotating cylinder 24 are respectively provided with mounting holes, and the rotating cylinder 24 is respectively sleeved on the push rod 22 and the surface of the guide rod 19 through the mounting holes at both ends; a second spiral groove 31 is provided on the surface of the guide rod 19, and a second pin shaft 30 is fixedly connected to the inner wall of the mounting hole at the front end of the rotating cylinder 24, and the second pin shaft 30 is meshed with the second spiral groove 31. When the displacement cylinder 15 moves to the front side, the meshing of the second pin shaft 30 and the second spiral groove 31 is performed. The rotating cylinder 24 can be driven to rotate inside the displacement cylinder 15; the front end of the push rod 22 is fixedly connected to a matching plate 23, and the circumferential surface of the matching plate 23 is fixedly connected to a first pin shaft 25, and the first pin shaft 25 is meshed with the first spiral groove 29. An auxiliary spring 26 is arranged inside the rotating cylinder 24, and the two ends of the auxiliary spring 26 are respectively fixedly connected to gaskets 27, and the gaskets 27 are respectively rotatably connected to the matching plate 23 and the inner wall of the rotating cylinder 24. When the rotating cylinder 24 rotates, the auxiliary spring 26 is not affected, and the auxiliary spring 26 can assist in pushing the push rod 22 to reset, providing resistance for the reset of the push rod 22; when the displacement cylinder 15 is pushed by the fluid The rotating cylinder 24 can be driven to move forward synchronously. When the rotating cylinder 24 moves forward, the first pin 25 is engaged with the first spiral groove 29, and the push rod 22 is also driven to move forward synchronously. At this time, the rotating cylinder 24 and the push rod 22 are in a relatively static state. Since the guide rod 19 is fixed, the rotating cylinder 24 can be driven to rotate by the engagement of the second pin 30 and the second spiral groove 31 when the rotating cylinder 24 moves. The rear side of the surface of the push rod 22 is fixedly connected to the limit plate 28. The inner wall of the displacement tube is provided with a limit groove slidably connected to the limit plate 28. Under the sliding cooperation between the limit plate 28 and the limit groove, the push rod 22 It can only move axially in the displacement tube. Therefore, when the rotating cylinder 24 rotates, the first pin shaft 25 and the first spiral groove 29 are engaged to drive the displacement rod to move inside the rotating cylinder 24, so as to store force on the push rod 22. After the rubber plug 14 is located at the rear end of the push rod 22, the displacement cylinder 15 moves backward and resets to drive the rotating cylinder 24 to reverse, and when the displacement cylinder 15 moves backward, it can also drive the rubber plug 14 to move backward at the same time. Then, after the displacement cylinder 15 is reset, the rubber plug 14 protrudes from the duckbill valve 16 under the push of the push rod 22, and is inserted into the slurry outlet pipe 2 and the grouting pipe 3, so as to block the slurry outlet pipe 2 and the grouting pipe 3.

[0047] like Fig. 9As shown, the lower side of the mounting tube 4 is respectively fixedly connected and connected with a matching tube, the feed tube 8 and the discharge tube 9 are respectively fixedly connected and connected with the matching tube, and the inside of the matching tube is respectively axially slidably connected with a valve core 39 that can move up and down, and the valve core 39 is used to block the connection between the feed tube 8 and the discharge tube 9 and the matching tube, so as to realize the opening and closing of the feed tube 8 and the discharge tube 9, and the lower ends of the two valve cores 39 are respectively fixedly connected with a vertically arranged driven plate 41, and the driven plate 41 is slidably connected with the matching tube. When the valve core 39 on the upper side is blocked at the outlet, the driven plate 41 is slidably connected with the matching tube. When the material pipe 9 is connected with the matching pipe, the valve core 39 on the lower side is located on the lower side of the connection between the feed pipe 8 and the matching pipe. At this time, the feed pipe 8 is in an open state and the discharge pipe 9 is in a closed state. After the grouting material enters the grouting sleeve 1, the fluid pressure can be continuously increased. By controlling the upper valve core 39 to move downward to release the blockage of the connection between the discharge pipe 9 and the matching pipe, and then the lower valve core 39 moves to the connection between the feed pipe 8 and the matching pipe, the feed pipe 8 can be blocked, and then the excess grouting material can overflow through the discharge pipe 9.

[0048] Furthermore, in order to facilitate the construction personnel to control the movement of the two valve cores 39, the corresponding ends of the two driven plates 41 are respectively fixedly connected with driven racks 42, and a reversing gear 43 is respectively meshed between the two driven racks 42. The reversing gear 43 is rotatably connected to the surface of the accommodating tube 5, and a gear shaft is fixedly connected to the middle part of the reversing gear 43, and the other end of the gear shaft is rotatably connected to the surface of the accommodating tube 5. The surface of the gear shaft is rotatably connected to the support plate 63 on the rear side, and a paddle plate is fixedly connected to the front end surface of the upper driven plate 41. By moving the paddle plate, the upper driven plate 41 can be driven to move downward, and under the meshing of the two driven racks 42 and the reversing gear 43, the two driven plates 41 can move synchronously relative to each other, and then the upper driven plate 41 can be driven to move upward while the lower driven plate 41 moves downward, so that the upper valve core 39 moves downward to open the discharge pipe 9, and then the lower valve core 39 moves upward to close the feed pipe 8.

[0049] In order to make the driven plate 41 remain stationary after moving, the valve core 39 can stay stably in the matching cylinder, such as Fig. 9 and Fig.10As shown, a transmission shaft 44 is fixedly connected to the middle part of the reversing gear 43, and the front end of the transmission shaft 44 is rotatably connected to the surface of the accommodating tube 5. A swing plate 46 is fixedly connected to the surface of the transmission shaft 44 and a stop plate 45 is rotatably connected. The front end of the stop plate 45 is fixedly connected to the surface of the accommodating tube 5, and a groove is provided at the front end of the stop plate 45. An arc groove 47 connected to the groove is coaxially provided at the rear end of the stop plate 45. A third pin 48 is fixedly connected to the upper end of the swing plate 46. The third pin 48 is slidably matched with the arc groove 47. A tension spring 49 is arranged inside the groove. One end of the tension spring 49 is fixedly connected to the third pin 48, and the other end is fixedly connected to the stop plate 45. The arc groove 47 can limit the swing plate 46 by sliding cooperation with the third pin shaft 48, and tilt the swing plate 46 to one side under the pull of the tension spring 49, and wait for the driven plate 41 on the upper side to move downward, and the reversing gear 43 is driven to rotate under the meshing of the driven rack 42 and the reversing gear 43, so as to drive the swing plate 46 to swing to the other side. During the swinging process, the tension spring 49 is stretched. When the swing plate 46 passes the axis, it can tilt to the other side under the pull of the tension spring 49, and provide resistance to the swing of the swing plate 46 under the elasticity of the tension spring 49, thereby improving the stability of the driven plate 41 accordingly, and then improving the stability of the valve core 39.

[0050] Furthermore, since multiple rubber plugs 14 can be placed inside the accommodating tube 5 for use, whenever the rubber plug 14 enters the displacement tube 15, the push plate 12 can be moved outward by an end distance under the push of the spring push assembly. In order to facilitate the construction personnel to control the opening and closing of the feed pipe 8, the rubber plug 14 can automatically block the grouting pipe 3 and the grouting pipe 2 after the grouting material fills the grouting sleeve 1, without the need for manual operation by the construction personnel, thereby improving the convenience of the device when in use. A protective box 55 is fixedly connected to the surface of the accommodating tube 5, and a coil spring 54 is arranged inside the protective box 55. One end of the coil spring 54 is fixedly connected to the inner wall of the protective box 55, and the inner end of the coil spring 54 is fixedly connected to a connecting shaft, which is coaxially rotatably connected to the protective box 55. A winding wheel 52 is fixedly connected to the surface of the connecting shaft at the rear end of the protective box 55, and a cam 51 is coaxially fixedly connected to the rear end of the winding wheel 52. The lower end of the plate 41 is fixedly connected with a protrusion 50, which slides in the lower side of the cam 51. A sliding groove is provided on the surface of the support plate 63 on the rear side. The lower end of the upper driven plate 41 is connected to the protrusion 50 through the sliding groove. The sliding groove can assist the driven plate to move downward to improve the stability during movement. A connecting rope 53 is wound around the surface of the winding wheel 52. One end of the connecting rope 53 is fixedly connected to the winding wheel 52, and the other end is fixedly connected to the lower push plate 12. Whenever the push plate 12 moves downward, it represents that the rubber plug 14 has entered the displacement cylinder 15. Then, when the push plate 12 moves downward, the winding wheel 52 can be driven to rotate under the drive of the connecting rope 53. When the winding wheel 52 rotates, the coil spring 54 can be driven to reel and store force under the transmission of the connecting shaft, and the cam 51 can be driven to rotate. The elastic force of the pushing spring 13 is greater than the elastic force of the coil spring 54. When the pushing spring 13 pushes the push plate 12 to move, the coil spring 54 can be fully driven to store force. Fig.11 As shown, when the cam 51 rotates, it can push the protrusion 50 to drive the upper driven plate 41 to move downward, and then drive the valve core 39 to move under the meshing and transmission of the connecting rack and the reversing gear 43, so that the feed pipe 8 is closed and the grouting material cannot be further injected. Then the discharge pipe 9 is opened, and the fluid pressure inside the grouting sleeve 1 disappears, so that the rubber plug 14 can be inserted into the grouting pipe 3 and the discharge pipe 2 under the push of the push rod 22. After the blocking is completed, the pull plate can be pushed upward to block the discharge pipe 9 again, the feed pipe 8 is opened, and then a new grouting sleeve 1 is connected for use. When the control push plate 12 moves upward to add a new rubber plug 14, the coil spring 54 can expand outward and drive the winding wheel 52 to rotate in the opposite direction to wind the connecting rope 53, which is convenient for next use.

[0051] The differential reset structure includes a mounting plate 33 fixedly connected to the surface of the accommodation tube 5, the mounting plate 33 is located between the two displacement cylinders 15, and the corresponding surfaces of the upper and lower displacement cylinders 15 are respectively fixedly connected with connecting plates 32, the connecting plates 32 are respectively slidably connected to the surface of the mounting tube 4, and the inner ends of the two connecting plates 32 are respectively slidably connected to the mounting plates 33;

[0052] The lower sides of the left and right ends of the upper connecting plate 32 are respectively fixedly connected with ratchet blocks 35, and the left and right sides of the upper end of the mounting plate 33 are respectively slidably connected with ratchet bars 34 that can move outward, and the front and rear sides of the lower end of the ratchet bar 34 are respectively fixedly connected with mounting slide blocks 36, and the surfaces of the mounting plates 33 corresponding to the mounting slide blocks 36 are respectively provided with mounting grooves, and the mounting slide blocks 36 are respectively slidably connected with the mounting grooves to improve the stability of the ratchet bar 34 when it moves, and the outer ends of the ratchet bar 34 are respectively fixedly connected with first reset springs The outer ends of the first return springs 37 are fixedly connected to the mounting plates 33, and the ratchet bars 34 are meshed with the ratchet blocks 35 under the push of the first return springs 37. The rear sides of the two ratchet bars 34 are fixedly connected with the linking plates 38 corresponding to the lower connecting plates 32, respectively. The lower connecting plates 32 drive the ratchet bars 34 on both sides to move outwards and disengage from the ratchet blocks 35 by pushing the linking plates 38. The linking plates 38 are provided with an inclined surface at one end corresponding to the lower connecting plate 32, which can be pushed when the connecting plate 32 is reset. The moving inclined surface forces the linkage plates 38 on both sides to move outward, thereby disengaging the ratchet bar 34 from the ratchet block 35, and the elastic force of the force storage spring 20 is greater than the elastic force of the first return spring 37. When the displacement cylinder 15 is reset under the push of the force storage spring 20, the connecting plate 32 can fully push the ratchet bar 34 to move outward and squeeze the first return spring 37; when the device is in use, when the displacement cylinder 15 moves outward, it can drive the connecting plate 32 to move outward synchronously, and the lower connecting plate 32 no longer squeezes the linkage plate 38 , the ratchet bar 34 can move inwardly under the push of the first return spring 37 to engage the ratchet block 35. Through the engagement of the ratchet bar 34 and the ratchet block 35, the displacement cylinder 15 on the upper side can move forward in one direction, and then cannot move backward, forming a situation in which the displacement cylinder 15 on the lower side moves backward and resets, and the ratchet plate is pushed away by the lower connecting plate 32, and the displacement cylinder 15 on the upper side can move backward and reset, forming a situation in which the grouting port on the lower side is blocked first, and then the grouting port on the upper side is blocked.

[0053] The surface of the accommodating tube 5 is respectively provided with movable grooves 7 along the moving direction of the push plate 12, and the inner walls of the movable grooves 7 are respectively slidably connected with auxiliary plates, and the auxiliary plates are respectively fixedly connected to the corresponding push plates 12. The auxiliary plates are used to facilitate construction personnel to control the movement of the push plates 12 so that space for placing the rubber plug 14 is reserved in the accommodating tube 5. The outer ends of the two movable grooves 7 are respectively provided with filling ports 6, and the rubber plug 14 enters the interior of the accommodating tube 5 through the filling ports 6, which is convenient for replenishing the rubber plug 14 and is conducive to the long-term use of the device.

[0054] The exhaust valve 17 includes a valve cylinder 56 fixedly connected to the surface of the mounting tube 4 and connected to the mounting tube 4. The valve cylinder 56 is coaxially arranged with the matching cylinder. A hemispherical opening is opened at one end of the valve cylinder 56 facing the inside of the mounting tube 4. A floating block 57 is coaxially arranged at the hemispherical opening. A gap for ventilation is formed between the floating block 57 and the inner wall of the hemispherical opening. A valve stem 58 is coaxially arranged inside the valve cylinder 56. One end of the valve stem 58 is fixedly connected to the floating block 57. A control plate 59 is fixedly connected to the outer end of the valve stem 58. The control plate 59 is located on the outside of the valve cylinder 56. Second return springs 60 are respectively sleeved on the surface of the valve stem 58 located inside the valve cylinder 56. The two ends of the second return spring 60 are respectively fixedly connected to the floating block 57 and the inner wall of the valve cylinder 56. The exhaust valve 17 is used to discharge internal gas when the grouting material is flowing to prevent the air pressure from pushing the displacement cylinder 15 to move in advance. When the grouting material flows, gas can pass through The air in the floating block 57 is then pushed outwards through the gap between the floating block 57 and the hemispherical opening. A plurality of air vents 61 are provided at the upper end of the valve cylinder 56 for exhausting air. The inner end opening of the hemispherical opening is larger than the outer end opening. The inner end of the floating block 57 is hemispherical. When the grouting material flows to the lower side of the floating block 57, the arc surface structure at the bottom of the floating block 57 can provide a contact surface for contacting the fluid in advance, so that the grouting material can push the floating block 57 to move upwards when flowing. When the floating ball moves upwards, the upper end opening of the valve cylinder 56 is blocked, so that the grouting material cannot overflow to the outside through the valve cylinder 56, so that the valve cylinder 56 can only exhaust air. The second reset spring 60 is used to support the floating ball and can assist in resetting the floating block 57. The control panel 59 is used to facilitate construction personnel to control the up and down movement of the floating block 57. When using the device, the construction personnel need to first move the control panel 59 up and down to drive the floating block 57 to move up and down to ensure that the floating block 57 can be used normally.

[0055] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A prefabricated building structural member connection device, comprising a grouting sleeve (1) and a rubber plug (14), wherein a grouting port and a grouting outlet are respectively arranged on the lower side and the upper side of the surface of the grouting sleeve (1), characterized in that: The grouting port and the grouting outlet are detachably connected to a grouting plugging device; The grouting and plugging device comprises two upper and lower mounting tubes (4), the mounting tubes (4) being fixedly connected and connected to a receiving tube (5), a spring pushing assembly being installed inside the receiving tube (5), and a placement space for placing a plurality of rubber plugs (14) being formed between the spring pushing assembly and the mounting tubes (4) on both sides; A displacement cylinder (15) that moves forward and backward is slidably connected to the interior of the mounting tube (4), a differential reset structure that controls the differential reset of the two displacement cylinders (15) is installed between the upper and lower displacement cylinders (15), a duckbill valve (16) is fixedly connected to the rear end of the displacement cylinder (15), a force storage spring (20) is connected between the front end of the displacement cylinder (15) and the mounting tube (4), a rectangular opening (21) for entering the rubber plug (14) is opened on the surface of the displacement cylinder (15), and a rubber plug (14) is inserted into the displacement cylinder (15). ) moves forward so that the rectangular opening (21) corresponds to the rubber plug (14), and then the rubber plug (14) enters the displacement cylinder (15) through the rectangular opening (21) under the push of the spring push assembly. The displacement cylinder (15) is slidably connected to a push rod (22) that can only move axially. When the displacement cylinder (15) moves forward, a structure is formed in which the push rod (22) moves forward inside the displacement cylinder (15), and the rubber plug (14) that enters the displacement cylinder (15) is located at the rear side of the push rod (22); The lower side of the upper mounting tube (4) is connected to a discharge tube (9), and the lower side of the lower mounting tube (4) is connected to a feed tube (8). The discharge tube (9) and the feed tube (8) are opened alternately, and exhaust valves (17) are respectively installed on the surfaces of the upper and lower mounting tubes (4); The front side of the displacement cylinder (15) is rotatably connected to a rotating cylinder (24); a guide rod (19) is provided at the front end of the displacement cylinder (15); the guide rod (19) is fixedly connected to the inner wall of the mounting tube (4); mounting holes are respectively provided at the front and rear ends of the rotating cylinder (24); the rotating cylinder (24) is respectively sleeved on the surfaces of the push rod (22) and the guide rod (19) through the mounting holes at the two ends; a second spiral groove (31) is provided on the surface of the guide rod (19); a second pin shaft (30) is fixedly connected to the inner wall of the mounting hole at the front end of the rotating cylinder (24); the second pin shaft (30) is meshed with the second spiral groove (31); when the displacement cylinder (15) moves toward the front side, the second pin shaft (30) is meshed with the second spiral groove (31), and the rotating cylinder (24) is driven to rotate inside the displacement cylinder (15); A matching plate (23) is fixedly connected to the front end of the push rod (22), a first pin shaft (25) is fixedly connected to the circumferential surface of the matching plate (23), and the first pin shaft (25) is meshed with the first spiral groove (29); The differential resetting structure comprises a mounting plate (33) fixedly connected to the surface of the accommodating tube (5), the mounting plate (33) being located between the two displacement cylinders (15), the corresponding surfaces of the upper and lower displacement cylinders (15) being respectively fixedly connected with connecting plates (32), the connecting plates (32) being respectively slidably connected to the surface of the mounting tube (4), and the inner ends of the two connecting plates (32) being respectively slidably connected to the mounting plates (33); The lower sides of the left and right ends of the upper connecting plate (32) are respectively fixedly connected with ratchet blocks (35); the left and right sides of the upper end of the mounting plate (33) are respectively slidably connected with ratchet bars (34) that move outward; the outer ends of the ratchet bars (34) are respectively fixedly connected with first return springs (37); the outer ends of the first return springs (37) are respectively fixedly connected with the mounting plate (33); the ratchet bars (34) mesh with the ratchet blocks (35) under the push of the first return springs (37); the rear sides of the two ratchet bars (34) are respectively fixedly connected with linkage plates (38) corresponding to the lower connecting plate (32); the lower connecting plate (32) drives the ratchet bars (34) on both sides to move outward and disengage from the ratchet blocks (35) by pushing the linkage plates (38); an inclined surface is provided at one end of the linkage plate (38) corresponding to the lower connecting plate (32); An auxiliary spring (26) is arranged inside the rotating cylinder (24), and gaskets (27) are fixedly connected to both ends of the auxiliary spring (26), respectively. The gaskets (27) are rotatably connected to the matching plate (23) and the inner wall of the rotating cylinder (24), respectively. The rear side of the surface of the push rod (22) is fixedly connected to a limit plate (28), and the inner wall of the displacement tube is provided with a limit groove slidably connected to the limit plate (28). After the displacement cylinder (15) is reset, the rubber plug (14) protrudes out of the duckbill valve (16) under the push of the push rod (22), and is inserted into the slurry outlet pipe (2) and the grouting pipe (3), thereby blocking the slurry outlet pipe (2) and the grouting pipe (3).

2. The assembly type building structure connection device according to claim 1, characterized in that: The spring push assembly comprises push springs (13) located at the upper and lower sides of the interior of the accommodating tube (5); the inner ends of the two push springs (13) are fixedly connected to a partition, the partition is fixedly connected to the inner wall of the accommodating tube (5); the outer ends of the two push springs (13) are respectively fixedly connected to push plates (12), the push plates (12) are respectively slidably connected to the inner wall of the accommodating tube (5); and the rubber plugs (14) are respectively maintained coaxially with the mounting tube (4) and are vertically arranged at the outer ends of the two push plates (12).

3. The assembly type building structure connection device according to claim 1, characterized in that: The lower side of the installation tube (4) is fixedly connected and connected to a matching tube, the feed tube (8) and the discharge tube (9) are fixedly connected and connected to the matching tube, the inside of the matching tube is axially slidably connected to a valve core (39) that moves up and down, the lower ends of the two valve cores (39) are fixedly connected to a vertically arranged driven plate (41), the driven plate (41) is slidably connected to the matching tube, and when the upper valve core (39) is blocked at the connection point between the discharge tube (9) and the matching tube, the lower valve core (39) is located at the lower side of the connection point between the feed tube (8) and the matching tube.

4. The assembly type building structure connection device according to claim 3, characterized in that: A driven rack (42) is fixedly connected to the corresponding ends of the two driven plates (41), a reversing gear (43) is meshed between the two driven racks (42), the reversing gear (43) is rotatably connected to the surface of the accommodating tube (5), and a shifting plate is fixedly connected to the front end surface of the upper driven plate (41).

5. The assembly type building structure connection device according to claim 4, characterized in that: A transmission shaft (44) is fixedly connected to the middle of the reversing gear (43), the front end of the transmission shaft (44) is rotatably connected to the surface of the accommodating tube (5), a swing plate (46) is fixedly connected to the surface of the transmission shaft (44) and a stop plate (45) is rotatably connected, the front end of the stop plate (45) is fixedly connected to the surface of the accommodating tube (5), a groove is provided at the front end of the stop plate (45), an arc groove (47) connected to the groove is coaxially provided at the rear end of the stop plate (45), a third pin shaft (48) is fixedly connected to the upper end of the swing plate (46), the third pin shaft (48) is slidably matched with the arc groove (47), a tension spring (49) is arranged inside the groove, one end of the tension spring (49) is fixedly connected to the third pin shaft (48), and the other end is fixedly connected to the central lower side of the stop plate (45).

6. The assembly type building structure connection device according to claim 3, characterized in that: A protective box (55) is fixedly connected to the surface of the accommodating tube (55), a coil spring (54) is arranged inside the protective box (55), one end of the coil spring (54) is fixedly connected to the inner wall of the protective box (55), the inner end of the coil spring (54) is fixedly connected to a connecting shaft, the connecting shaft is coaxially rotatably connected to the protective box (55), a winding wheel (52) is fixedly connected to the surface of the connecting shaft at the rear end of the protective box (55), the rear end of the winding wheel (52) is coaxially fixedly connected to a cam (51), a lower end of the upper driven plate (41) is fixedly connected to a protrusion (50), the protrusion (50) is slidably fitted on the lower side of the cam (51), a connecting rope (53) is wound around the surface of the winding wheel (52), one end of the connecting rope (53) is fixedly connected to the winding wheel (52), and the other end is fixedly connected to the lower push plate (12).

7. The assembly type building structure connection device according to claim 1, characterized in that: The surface of the housing tube (5) is provided with movable grooves (7) along the direction of movement of the push plate (12); the inner walls of the movable grooves (7) are slidably connected to auxiliary plates, which are fixedly connected to the corresponding push plates (12); the outer ends of the two movable grooves (7) are provided with filling ports (6), and the rubber plug (14) enters the interior of the housing tube (5) through the filling ports (6).

8. The assembly type building structure connection device according to claim 1, characterized in that: The exhaust valve (17) comprises a valve cylinder (56) fixedly connected to the surface of the mounting tube (4) and connected to the mounting tube (4); the valve cylinder (56) and the matching cylinder are arranged coaxially; a hemispherical opening is opened at one end of the valve cylinder (56) facing the inside of the mounting tube (4); a floating block (57) is arranged coaxially at the hemispherical opening; a gap for ventilation is formed between the floating block (57) and the inner wall of the hemispherical opening; a valve stem (58) is arranged coaxially inside the valve cylinder (56); one end of the valve stem (58) is fixedly connected to the floating block (57); the outer end of the valve stem (58) is fixedly connected to a control plate (59); the control plate (59) is located on the outer side of the valve cylinder (56); the surface of the valve stem (58) located inside the valve cylinder (56) is respectively sleeved with a second return spring (60); the two ends of the second return spring (60) are respectively fixedly connected to the floating block (57) and the inner wall of the valve cylinder (56).