Temporary butt joint device for drainage belt used for construction site drainage

Abstract

This invention belongs to the field of building construction drainage technology, specifically providing a temporary docking device for drainage belts used in building construction sites. It includes a connecting ring, a magnetic expansion mechanism, and a bidirectional synchronous clamping and pulling nesting mechanism. The magnetic expansion mechanism is rotatably arranged in a ring-shaped, equally spaced array on the edge of the connecting ring's sidewall, while the bidirectional synchronous clamping and pulling nesting mechanism is located on the circumferential sidewall of the connecting ring. This invention utilizes the array distribution and magnetic variations to change the structural state, effectively solving the contradiction of needing to use larger connectors to match the size of the connector and drainage belt for improved sealing, while also using smaller connectors for easier docking operations. This significantly reduces the difficulty of installing the drainage belt and improves the reliability of the drainage belt connection.

Description

Technical Field

[0001] This invention belongs to the field of building construction drainage technology, specifically referring to a temporary docking device for drainage belts used in building construction sites. Background Technology

[0002] Drainage hoses are widely used in various drainage fields due to their lightweight and easy-to-store characteristics. During the construction phase, construction sites usually do not have a complete drainage system. In case of rainy weather, a large amount of rainwater will accumulate on the construction site. Therefore, it is necessary to temporarily deploy water pumps and drainage hoses to drain the rainwater. However, the length of a single drainage hose is often insufficient to meet the needs of use. Therefore, it is necessary to connect and assemble multiple drainage hoses. For drainage hoses with built-in connectors, the connection and assembly are relatively convenient. It is only necessary to snap the connectors together. However, for drainage hoses without connectors or with connectors that have fallen off or been lost, it is more difficult to connect and assemble them.

[0003] For drainage hoses without connectors or with lost or detached connectors, assemblers typically use a rigid short pipe with a smaller diameter as a bridging hub to connect the drainage hose to both ends. This connection method has low reliability, resulting in folds at the connection point, poor sealing, and the rigid short pipe significantly impacts the pipe's flow area. The drainage hose is also prone to detachment due to increased water pressure. When using a rigid short pipe with a diameter slightly smaller than the drainage hose's inner diameter as a bridging hub, it is difficult for operators to fit the end of the drainage hose onto the outer wall of the rigid short pipe, making the connection laborious. Existing technology cannot reconcile the contradiction between the ease of operation and the reliability of the drainage hose connector, making it difficult to perform quick on-site connection and assembly for this type of drainage hose. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a temporary docking device for drainage hoses used in construction sites. It addresses the challenge of balancing convenient and reliable drainage hose connections—that is, using larger connectors to match the hose size for improved sealing while also using smaller connectors for easier operation. By employing a magnetic expansion mechanism, the device allows for variable-size fitting and expansion of the drainage hose, ensuring the inner diameter of the hose matches the outer wall size of the connecting ring. This significantly reduces the difficulty of fitting the drainage hose and improves the reliability of the connection.

[0005] The technical solution adopted by this invention is as follows: This solution provides a temporary docking device for drainage belts used in construction sites, including a connecting ring, a magnetic expansion mechanism, and a bidirectional synchronous clamping and pulling nesting mechanism. The magnetic expansion mechanism is rotatably arranged in a ring-shaped, equally spaced array on the edge of the connecting ring sidewall. The bidirectional synchronous clamping and pulling nesting mechanism is located on the circumferential sidewall of the connecting ring. The magnetic expansion mechanism utilizes the array distribution and magnetic changes to change the structural state, effectively solving the contradiction of needing to use a larger connector to match the size of the connector and the drainage belt to improve the tightness of the docking, while also needing to use a smaller connector to make the docking operation more convenient. The bidirectional synchronous clamping and pulling nesting mechanism includes a fixed-center clamping device, a bidirectional synchronous contraction and pulling device, and a pulling power component. The bidirectional synchronous contraction and pulling device is located on the outer circumferential sidewall of the connecting ring, the fixed-center clamping device is slidably arranged in a ring-shaped array on the inner wall of the bidirectional synchronous contraction and pulling device, and the pulling power component is located on the outer circumferential sidewall of the connecting ring.

[0006] Furthermore, the magnetic expansion mechanism includes magnetic expansion and drag-reducing wheels, expansion rods, and an electrical connection turntable. The electrical connection turntable is arranged in a ring-shaped, equally spaced array and rotates on both edges of the connecting ring sidewall. The expansion rods are fixedly mounted on the circumferential sidewalls of the electrical connection turntable. The magnetic expansion and drag-reducing wheels are rotatably mounted on the end sidewalls of the expansion rods away from the electrical connection turntable. Columnar electromagnetic blocks are fixedly installed inside the magnetic expansion and drag-reducing wheels. The magnetic expansion mechanism achieves a synchronous gathering effect by utilizing the magnetic expansion and drag-reducing wheels with embedded columnar electromagnetic blocks, thereby forming a ring-shaped structure that facilitates the installation of the drainage belt and significantly reduces the difficulty of installing the drainage belt.

[0007] Furthermore, the bidirectional synchronous contraction and traction device includes an arc-shaped contraction rod and a contraction guide rod. The contraction guide rod is symmetrically distributed and fixed on the outer circumference of the connecting ring. The arc-shaped contraction rod is symmetrically distributed and slidably disposed on the contraction guide rod. The arc-shaped contraction rod is disposed outside the magnetic expansion support mechanism. The inner wall of the arc-shaped contraction rod is provided with an arc-shaped slot in an annular array. The side wall of the arc-shaped contraction rod is provided with a threaded hole in an annular array. The side wall of the arc-shaped contraction rod is provided with a guide hole in a symmetrical array. The contraction guide rod is slidably disposed through the guide hole.

[0008] Furthermore, the center-fixed clamping device includes an arc-shaped steering rod and a Y-shaped pneumatic finger. The arc-shaped steering rod is slidably engaged in the arc-shaped slot, and the Y-shaped pneumatic finger is fixedly mounted on the arc-shaped inner wall of the arc-shaped steering rod. The arrangement in which the position of the end of the Y-shaped pneumatic finger away from the arc-shaped steering rod after clamping coincides with the center of the arc of the arc-shaped steering rod ensures that the pulling point of the Y-shaped pneumatic finger on the edge of the drainage strip does not change with the sliding of the arc-shaped steering rod, so that the drainage strip still maintains a size match with the connecting retainer when pulled.

[0009] Furthermore, the traction power assembly includes a nested motor and a nested bidirectional screw. The nested motor is arranged in a ring array and fixedly disposed on the outer wall of the connecting ring. The nested bidirectional screw is helically engaged with the opposite side wall of the arc-shaped contraction rod. Both ends of the nested bidirectional screw are respectively engaged with the inner wall of the screw hole. The nested bidirectional screw and the screw hole are respectively meshed. The output end of the nested motor is coaxially fixedly provided with a nested power gear. The middle part of the nested bidirectional screw is coaxially fixedly provided with a nested driven gear. The nested power gear and the nested driven gear mesh.

[0010] Furthermore, the connecting ring sidewall edge is provided with annular array of expansion grooves, the electrical connection turntable is rotatably disposed on the inner wall of the expansion groove, the connecting ring outer circumference outer wall is provided with symmetrical annular clamping grooves, the connecting ring lower wall is fixedly provided with a base, the connecting ring outer circumference outer wall is fixedly provided with a magnetic reversing button and a control board, the magnetic reversing button and the columnar electromagnetic block are electrically connected, and the Y-type pneumatic finger and the nested motor are electrically connected to the control board respectively.

[0011] Furthermore, a rubber sleeve is fitted on the outer wall of the magnetically extended drag-reducing wheel.

[0012] Furthermore, a hydraulic generator is provided on the inner wall of the connecting ring, and a storage battery is fixed inside the connecting ring. The hydraulic generator and the storage battery are electrically connected, and the storage battery is electrically connected to the Y-type pneumatic finger, the nested motor, and the columnar electromagnetic block.

[0013] Furthermore, the magnetically extended drag-reducing wheel is preferably made of an insulating material.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows:

[0015] (1) The magnetic expansion support mechanism uses the array distribution and magnetic changes to change the structural state, which effectively solves the contradiction between using a larger joint to match the size of the joint and the drainage belt to improve the tightness of the connection and using a smaller joint to make the connection operation more convenient.

[0016] (2) The magnetic expansion mechanism achieves the effect of synchronous gathering by means of the magnetic expansion and drag reduction wheel with embedded columnar electromagnetic blocks, thereby forming a ring structure that is easy to install the drainage belt, which significantly reduces the difficulty of installing the drainage belt.

[0017] (3) The magnetic expansion and drag reduction wheel utilizes the magnetic exchange characteristics of the columnar electromagnetic block to achieve synchronous gathering and synchronous dispersion, thereby enabling the equipment to automatically expand the installed drainage belt, so that the inner diameter of the drainage belt and the outer wall size of the connecting ring match.

[0018] (4) The setting method in which the position of the end of the Y-type pneumatic finger away from the arc-shaped steering rod after clamping coincides with the center of the arc of the arc-shaped steering rod ensures that the pulling point of the Y-type pneumatic finger on the edge of the drainage belt does not change with the sliding of the arc-shaped steering rod, so that the drainage belt still maintains size matching with the connecting ring when pulled.

[0019] (5) The magnetic expansion and drag reduction wheel reduces the resistance during the pulling process of the drainage belt, effectively preventing the drainage belt from being scratched or damaged during the expansion and pulling process;

[0020] (6) The annular clamping groove and the Y-shaped pneumatic finger make the connection between the drainage belt and the connecting ring more robust through the double connection effect, effectively avoiding the breakage and leakage of the drainage belt during use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a temporary docking device for drainage belts used in construction site drainage proposed in this invention.

[0022] Figure 2 This is a schematic diagram of the connecting ring and magnetic expansion mechanism proposed in this invention. Figure 1 ;

[0023] Figure 3 This is a schematic diagram of the magnetic expansion mechanism proposed in this invention;

[0024] Figure 4 This is a side sectional view of the magnetically extended drag-reducing wheel proposed in this invention;

[0025] Figure 5 This is a schematic diagram of the bidirectional synchronous contraction and traction device proposed in this invention;

[0026] Figure 6 This is a schematic diagram of the structure of the fixed-center clamping device proposed in this invention;

[0027] Figure 7 This is a schematic diagram of the traction power assembly proposed in this invention;

[0028] Figure 8 This is a schematic diagram of the connecting ring and magnetic expansion mechanism proposed in this invention. Figure 2 .

[0029] Among them, 1. Connecting ring, 11. Expansion groove, 12. Annular clamping groove, 13. Base, 14. Magnetic reversing button, 15. Control board, 16. Hydroelectric generator, 17. Battery, 2. Magnetic expansion mechanism, 21. Magnetic expansion drag reduction wheel, 211. Columnar electromagnetic block, 212. Rubber sleeve, 22. Expansion rod, 23. Electrical connection turntable, 3. Bidirectional synchronous clamping and traction nesting mechanism, 31. Fixed circle center clamping device, 311. Arc-shaped steering rod, 312. Y-type pneumatic finger, 32. Bidirectional synchronous retraction traction device, 321. Arc-shaped retraction rod, 3210. Arc-shaped slot, 3211. Screw hole, 3212. Guide hole, 322. Retraction guide rod, 33. Traction power component, 331. Nested motor, 3310. Nested power gear, 332. Nested bidirectional screw, 3320. Nested driven gear.

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Example: Please refer to Figures 1-7A temporary docking device for drainage belts used in construction sites includes a connecting ring 1, a magnetic expansion mechanism 2, and a bidirectional synchronous clamping and pulling nesting mechanism 3. The magnetic expansion mechanism 2 is rotatably arranged in a ring-shaped, equally spaced array on the edge of the side wall of the connecting ring 1. The bidirectional synchronous clamping and pulling nesting mechanism 3 is located on the circumferential side wall of the connecting ring 1. The bidirectional synchronous clamping and pulling nesting mechanism 3 includes a fixed-center clamping device 31, a bidirectional synchronous retraction and pulling device 32, and a pulling power component 33. The bidirectional synchronous retraction and pulling device 32 is located on the outer circumferential side wall of the connecting ring 1, and the fixed-center clamping device 31 is arranged in a ring-shaped array. The array is slidably disposed on the inner wall of the bidirectional synchronous contraction traction device 32, and the traction power component 33 is disposed on the outer circumferential outer wall of the connecting ring 1; the magnetic expansion mechanism 2 includes magnetic expansion drag-reducing wheels 21, expansion rods 22 and an electric connection turntable 23. The electric connection turntable 23 is rotatably disposed in an annular array at equal intervals on both edges of the side wall of the connecting ring 1. The expansion rods 22 are fixedly disposed on the circumferential side wall of the electric connection turntable 23. The magnetic expansion drag-reducing wheels 21 are rotatably disposed on the end side wall of the expansion rods 22 away from the electric connection turntable 23. A columnar electromagnetic block 211 is fixedly disposed inside the magnetic expansion drag-reducing wheels 21.

[0034] The bidirectional synchronous contraction and traction device 32 includes an arc-shaped contraction rod 321 and a contraction guide rod 322. The contraction guide rod 322 is symmetrically distributed and fixed on the outer circumference of the connecting ring 1. The arc-shaped contraction rod 321 is symmetrically distributed and slidably disposed on the contraction guide rod 322. The arc-shaped contraction rod 321 is disposed outside the magnetic expansion and support mechanism 2. The inner wall of the arc-shaped contraction rod 321 is provided with an arc-shaped slot 3210 distributed in an annular array. The side wall of the arc-shaped contraction rod 321 is provided with a threaded hole 3211 distributed in an annular array. The side wall of the arc-shaped contraction rod 321 is provided with a guide hole 3212 symmetrically distributed and slidably disposed through the guide hole 3212. The contraction guide rod 322 is respectively disposed through the guide hole 3212.

[0035] The centering clamping device 31 includes an arc-shaped steering rod 311 and a Y-shaped pneumatic finger 312. The arc-shaped steering rod 311 is slidably engaged in the arc-shaped slot 3210, and the Y-shaped pneumatic finger 312 is fixedly disposed on the arc-shaped inner wall of the arc-shaped steering rod 311. The position of the end of the Y-shaped pneumatic finger 312 away from the arc-shaped steering rod 311 after clamping coincides with the center position of the arc of the arc-shaped steering rod 311.

[0036] The traction power assembly 33 includes a nested motor 331 and a nested bidirectional screw 332. The nested motor 331 is arranged in a ring array and fixed on the outer circumference of the connecting ring 1. The nested bidirectional screw 332 is helically engaged with the opposite sidewall of the arc-shaped contraction rod 321. Both ends of the nested bidirectional screw 332 are respectively engaged with the inner wall of the screw hole 3211. The nested bidirectional screw 332 and the screw hole 3211 are respectively meshed. The output end of the nested motor 331 is coaxially fixed with a nested power gear 3310. The middle part of the nested bidirectional screw 332 is coaxially fixed with a nested driven gear 3320. The nested power gear 3310 and the nested driven gear 3320 are meshed.

[0037] Please see Figure 1-7 The connecting ring 1 has annularly arranged expansion grooves 11 on its sidewall edge. The electrically connected turntable 23 is rotatably mounted on the inner wall of the expansion groove 11. The connecting ring 1 has symmetrically arranged annular clamping grooves 12 on its outer circumference. The connecting ring 1 has a base 13 fixedly mounted on its lower wall. The connecting ring 1 has a magnetic reversing button 14 and a control board 15 fixedly mounted on its outer circumference. The magnetic reversing button 14 and the columnar electromagnetic block 211 are electrically connected. The Y-shaped pneumatic finger 312 and the nested motor 331 are electrically connected to the control board 15.

[0038] Please see Figure 3 , Figure 4 The outer wall of the magnetic expansion and drag reduction wheel 21 is fitted with a rubber sleeve 212.

[0039] Please see Figures 1-8 A hydroelectric generator 16 is provided on the inner wall of the connecting ring 1. A storage battery 17 is fixed inside the connecting ring 1. The hydroelectric generator 16 and the storage battery 17 are electrically connected. The storage battery 17 is electrically connected to the Y-type pneumatic finger 312, the nested motor 331 and the columnar electromagnetic block 211.

[0040] Preferably, the magnetically extended drag-reducing wheel 21 is made of insulating material.

[0041] The implementation principle of this embodiment:

[0042] When the magnetic expansion mechanism 2 is in a gathered state, it forms a small nested ring. At this time, the drainage belt can be easily fitted onto the outside of the magnetic expansion mechanism 2. After the magnetic expansion mechanism 2 expands synchronously under the action of magnetism, the drainage belt is supported. The bidirectional synchronous clamping and pulling nesting mechanism 3 uses the fixed circle center clamping device 31 to clamp the edge of the drainage belt, and uses the bidirectional synchronous contraction and pulling device 32 and the pulling power component 33 to synchronously clamp, contract and pull the drainage belts on both sides of the connecting ring 1, so that the drainage belt is simultaneously fitted onto the outer wall of the connecting ring 1. The operator reinforces and locks the drainage belt to complete the docking of the drainage belt.

[0043] The specific implementation method of this embodiment is as follows: When connecting the drainage belts, the drainage belts are first laid out according to a predetermined route, and the distance between adjacent drainage belts is just enough to achieve connection. The operator places the temporary connection device for drainage belts for construction site drainage proposed in this solution at the connection point of the drainage belts. In the initial state, the columnar electromagnetic block 211 is in the de-energized state, the arc-shaped retractable rod 321 is in a position close to each other, the arc-shaped retractable rod 321 is located outside the annular clamping groove 12, and the position of the arc-shaped steering rod 311 in the arc-shaped slot 3210 makes the end of the Y-shaped pneumatic finger 312 located inside the arc-shaped slot 3210.

[0044] When nesting the drainage belt, the operator controls the columnar electromagnetic blocks 211 to be energized synchronously via the control panel 15. At this time, the columnar electromagnetic blocks 211 attract each other and are brought together by mutual magnetic attraction, so that the magnetic expansion and drag reduction wheel 21 forms a small circle on the side of the connecting ring 1. The operator puts the drainage belt on the outside of the magnetic expansion and drag reduction wheel 21. After the belt is put on, the operator controls the columnar electromagnetic blocks 211 to switch magnetically synchronously via the magnetic reversal button 14. The columnar electromagnetic blocks 211 change from a state of mutual attraction to a state of mutual repulsion. The columnar electromagnetic blocks 211 drive the expansion rod 22 and the electrical connection turntable 23 to rotate and disperse towards the outside of the side wall of the connecting ring 1 through the magnetic expansion and drag reduction wheel 21. During this process, the magnetic expansion and drag reduction wheel 21 synchronously expands the drainage belt from the inner wall of the drainage belt, so that the inner diameter of the drainage belt matches the outer wall size of the connecting ring 1.

[0045] After the drainage belt is nested, it is simultaneously pulled to the outer wall of the connecting snap ring 1. The operator controls the nesting motor 331 via the control panel 15. The nesting motor 331 drives the nesting power gear 3310 to rotate. The nesting power gear 3310 drives the nesting bidirectional screw 332 to rotate via the nesting driven gear 3320. The nesting bidirectional screw 332 causes the arc-shaped retractable rod 321 to slide synchronously along the retractable guide rod 322 and move away from each other through the screw hole 3211. During this process, the operator pauses the nesting motor 331 and pushes the arc-shaped steering rod 311, so that the Y-shaped pneumatic finger 312 moves away from the end of the arc-shaped steering rod 311. At this time, the Y-shaped pneumatic finger 312... 12. With the end of the Y-shaped pneumatic finger 312 away from the arc-shaped steering rod 311 and simultaneously facing the edge of the drainage strip, the nested motor 331 continues to start. When the end of the Y-shaped pneumatic finger 312 away from the arc-shaped steering rod 311 reaches the edge of the drainage strip, the nested motor 331 stops running and the Y-shaped pneumatic finger 312 starts running. The Y-shaped pneumatic finger 312 simultaneously clamps the edge of the drainage strip. After clamping, the drainage strip begins to be pulled, and the nested motor 331 begins to run in the opposite direction. During this process, the Y-shaped pneumatic finger 312 is subjected to the reverse force of the edge of the drainage strip. The Y-shaped pneumatic finger 312 transmits this force to the arc-shaped steering rod 311. Because the end of the Y-shaped pneumatic finger 312 away from the arc-shaped steering rod 311 is in a different position after clamping... The center of the arc where the arc-shaped steering rod 311 is located coincides with the center of the arc. The reverse force exerted by the drainage belt on the Y-shaped pneumatic finger 312 points towards the center of the arc-shaped steering rod 311. Therefore, the sliding amplitude of the arc-shaped steering rod 311 along the inner wall of the arc-shaped groove 3210 is very small. The arc-shaped contraction rods 321 move closer together again when the nested motor 331 runs in the opposite direction, thereby pulling the drainage belt. During this process, the magnetic expansion and drag-reducing wheel 21 rotates due to the pull of the drainage belt. The magnetic expansion and drag-reducing wheel 21 reduces the resistance during the pulling motion of the drainage belt, effectively preventing the drainage belt from being scratched or damaged during the expansion and pulling process. When the arc-shaped contraction rods 321 move closer together and their respective... When the backs of the arc-shaped steering rods 311 touch each other, the arc-shaped steering rods 311 begin to slide along the inner wall of the arc-shaped groove 3210 and move the Y-shaped pneumatic fingers 312. The movement trajectory of the edge of the Y-shaped pneumatic fingers 312 clamping the drainage belt remains unchanged. During this process, the arc-shaped retraction rod 321 can continue to approach. When the edge of the Y-shaped pneumatic fingers 312 clamping the drainage belt reaches between the annular clamping grooves 12, the pulling ends. The operator locks the drainage belt at the position of the annular clamping grooves 12 with fastening material. The annular clamping grooves 12 and the Y-shaped pneumatic fingers 312 make the connection between the drainage belt and the connecting ring 1 more solid through the double connection, effectively avoiding the breakage and leakage of the drainage belt during use.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0048] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A temporary docking device for drainage hoses used in construction sites, comprising a connecting snap ring (1), characterized in that: The connecting ring (1) has a magnetic expansion mechanism (2) arranged in an annular array at equal intervals on the sidewall edge. The connecting ring (1) has a bidirectional synchronous clamping and pulling nesting mechanism (3) on its circumferential sidewall. The bidirectional synchronous clamping and pulling nesting mechanism (3) includes a fixed-center clamping device (31), a bidirectional synchronous contraction pulling device (32), and a pulling power component (33). The bidirectional synchronous contraction pulling device (32) is located on the outer circumferential sidewall of the connecting ring (1). The fixed-center clamping device (31) is arranged in an annular array and slidably located on the inner wall of the bidirectional synchronous contraction pulling device (32). The pulling power component (33) is located on the outer circumferential sidewall of the connecting ring (1). The magnetic expansion mechanism (2) includes a magnetic expansion drag-reducing wheel (21), an expansion rod (22), and an electrical connection turntable (23). The electrical connection turntable (23) is arranged in a ring-shaped array with equal spacing and is rotatably disposed on the two edges of the side wall of the connecting ring (1). The expansion rod (22) is fixedly disposed on the circumferential side wall of the electrical connection turntable (23). The magnetic expansion drag-reducing wheel (21) is rotatably disposed on the end side wall of the expansion rod (22) away from the electrical connection turntable (23). A columnar electromagnetic block (211) is fixedly disposed inside the magnetic expansion drag-reducing wheel (21). The bidirectional synchronous contraction and traction device (32) includes an arc-shaped contraction rod (321) and a contraction guide rod (322). The contraction guide rod (322) is symmetrically distributed and fixed on the outer circumference of the connecting ring (1). The arc-shaped contraction rod (321) is symmetrically distributed and slidably disposed on the contraction guide rod (322). The arc-shaped contraction rod (321) is disposed outside the magnetic expansion support mechanism (2). The inner wall of the arc-shaped retractable rod (321) is provided with an arc-shaped slot (3210) arranged in an annular array. The fixed-center clamping device (31) includes an arc-shaped steering rod (311) and a Y-shaped pneumatic finger (312). The arc-shaped steering rod (311) is slidably engaged in the arc-shaped slot (3210). The Y-shaped pneumatic finger (312) is fixedly disposed on the arc-shaped inner wall of the arc-shaped steering rod (311). The end of the Y-shaped pneumatic finger (312) away from the arc-shaped steering rod (311) coincides with the center position of the arc of the arc where the arc-shaped steering rod (311) is located.

2. A temporary connection device for drainage hoses used in construction site drainage according to claim 1, characterized in that: The arc-shaped retractable rod (321) has screw holes (3211) arranged in an annular array on its side wall, and guide holes (3212) are symmetrically distributed on its side wall. The retractable guide rods (322) are respectively slidably arranged through the guide holes (3212).

3. A temporary connection device for drainage hoses used in construction site drainage according to claim 2, characterized in that: The traction power assembly (33) includes a nested motor (331) and a nested bidirectional screw (332). The nested motor (331) is arranged in a ring array and fixed on the outer circumference of the connecting ring (1). The nested bidirectional screw (332) is spirally rotated and engaged with the opposite side wall of the arc-shaped contraction rod (321). The two ends of the nested bidirectional screw (332) are respectively engaged with the inner wall of the screw hole (3211). The nested bidirectional screw (332) and the screw hole (3211) are respectively meshed. The output end of the nested motor (331) is coaxially fixed with a nested power gear (3310). The middle part of the nested bidirectional screw (332) is coaxially fixed with a nested driven gear (3320). The nested power gear (3310) and the nested driven gear (3320) mesh.

4. A temporary connection device for drainage hoses used in construction site drainage according to claim 3, characterized in that: The connecting ring (1) has an annular array of expansion grooves (11) distributed along its sidewall edge. The electric connecting turntable (23) is rotatably mounted on the inner wall of the expansion groove (11). The connecting ring (1) has an annular clamping groove (12) symmetrically arranged on its outer circumference. The connecting ring (1) has a base (13) fixedly mounted on its lower wall. The connecting ring (1) has a magnetic reversing button (14) and a control board (15) fixedly mounted on its outer circumference. The magnetic reversing button (14) and the columnar electromagnetic block (211) are electrically connected. The Y-shaped pneumatic finger (312) and the nested motor (331) are electrically connected to the control board (15).

5. A temporary connection device for drainage hoses used in construction site drainage according to claim 4, characterized in that: The outer wall of the magnetic expansion and drag reduction wheel (21) is fitted with a rubber sleeve (212).

6. A temporary connection device for drainage hoses used in construction site drainage according to claim 5, characterized in that: The inner wall of the connecting ring (1) is provided with a hydroelectric generator (16), and a storage battery (17) is fixed inside the connecting ring (1). The hydroelectric generator (16) and the storage battery (17) are electrically connected. The storage battery (17) is electrically connected to the Y-type pneumatic finger (312), the nested motor (331), and the columnar electromagnetic block (211).

7. A temporary connection device for drainage hoses used in construction site drainage according to claim 6, characterized in that: The magnetically extended drag-reducing wheel (21) is made of insulating material.

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