A rubber connector and a method of manufacturing the same

Abstract

The present application relates to the technical field of rubber connecting piece, especially relates to a rubber connecting piece and a manufacturing method thereof, which comprises a connecting valve, wire connection ports are rotatably installed at both ends of the connecting valve, a hard pipe sleeve is rotatably installed at the wire connection port on the right side, a connecting valve mechanism is arranged in the connecting valve, a sealing sleeve is movably installed at the rear end of the connecting outer pipe, a fixed square pipe is fixedly installed at the rear end of the connecting cone pipe, a movable sleeve is movably installed at the rear end of the fixed square pipe, a worm gear mechanism is fixedly installed on one side surface between the fixed square pipe and the movable sleeve, and a ratchet anti-reverse mechanism is fixedly installed on the other side surface between the fixed square pipe and the movable sleeve. The worm gear mechanism and the ratchet anti-reverse mechanism are adopted, the angle needs to be adjusted according to the working environment when the equipment is installed or maintained, the hard support connected in sections can flexibly adjust the direction of the connecting line, the stability of the connection is ensured, and the angle adjustment is more stable due to the integrated ratchet anti-reverse mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber connectors, in particular to a rubber connector and a manufacturing method thereof. BACKGROUND

[0002] In industrial automation production lines, equipment connection lines need to connect various sensors, actuators and controllers. These connection lines will be stressed due to mechanical vibration, frequent movement or relocation of equipment.

[0003] Automation production lines often need to perform high-strength work, and the robot arm equipment will vibrate when running, causing the connection line to loosen or be damaged. In addition, the production line is equipped with different equipment, and the complex mechanical structure will limit the wiring space of the connection line. Multiple devices are placed together, which makes the installation or maintenance limited by angle, resulting in irregular space layout.

[0004] The existing rubber connector has the following disadvantages:

[0005] 1. The equipment cable is mostly wrapped around the battery core with bare rubber material. Due to the high production intensity of the automation production line, the traditional rubber connector will undergo irreversible deformation, affecting its compensation displacement and shock absorption function. In addition, it will accelerate aging in high-temperature or low-temperature environments, leading to performance degradation and corrosion aging.

[0006] 2. There are a large number of mechanical parts and sharp edges in the industrial environment. The bare rubber cable is worn or scratched due to friction and collision, causing damage to the insulation layer, and thus causing short circuit or electric leakage. Frequent mechanical movement will cause the cable to be excessively stretched and bent, damaging the internal battery core and affecting signal transmission and power supply stability.

[0007] 3. In the industrial automation production line, the industrial robot arm will move and adjust the position frequently. The fixed support structure cannot adapt to such dynamic changes, which will cause the cable to be damaged due to excessive stretching, bending and twisting. When the production line needs to be adjusted and optimized, the cable of the fixed support structure is difficult to rearrange, increasing the adjustment cost and time. In addition, the common vibration and impact in the industrial environment will cause stress concentration of the cable at the fixed point, thereby accelerating the wear and damage of the cable.

[0008] Therefore, according to the above disadvantages, a rubber connector and a manufacturing method thereof are proposed. SUMMARY

[0009] The purpose of the present application is to solve the disadvantages in the background art and propose a rubber connector and a manufacturing method thereof.

[0010] In order to achieve the above object, the technical scheme adopted by the present application is as follows: a rubber connecting piece and a manufacturing method thereof, comprising a connecting valve, wire connection ports are rotatably installed at both ends of the connecting valve, a hard pipe sleeve is rotatably installed at the right wire connection port, a connecting outer pipe is rotatably installed at the rear end of the hard pipe sleeve, a sealing sleeve pipe is movably installed at the rear end of the connecting outer pipe, a sealing inner pipe is movably installed inside the connecting outer pipe, a connecting cone pipe is fixedly installed at the rear end of the sealing sleeve pipe, a fixed square pipe is fixedly installed at the rear end of the connecting cone pipe, a movable sleeve pipe is movably installed at the rear end of the fixed square pipe, a worm and gear mechanism is fixedly installed on one side surface between the fixed square pipe and the movable sleeve pipe, and a ratchet wheel anti-reverse mechanism is fixedly installed on the other side surface between the fixed square pipe and the movable sleeve pipe.

[0011] Preferably, the connecting valve mechanism comprises rotating seats fixedly installed on both sides of the outer surface of the connecting valve, a bent arm is rotatably installed between every two rotating seats, an empty groove is formed at the lower end of the bent arm on the outer surface of the connecting valve, and a limiting clamp is rotatably installed at one end of one side of the bent arm.

[0012] Preferably, a rubber inner pipe is fixedly installed inside the hard pipe sleeve, a metal woven mesh is fixedly installed between the rubber inner pipe and the hard pipe sleeve, a connecting thread is fixedly installed at the rear end of the hard pipe sleeve, and an embedded thread groove is arranged on the inner wall of the front end of the hard pipe sleeve.

[0013] Preferably, the worm and gear mechanism comprises a semicircular groove formed on one side surface of the movable sleeve pipe, a driving motor is fixedly installed at one end of the semicircular groove, a worm is fixedly installed at the output end of the driving motor, a fixed rotating table is rotatably installed at the center position of the semicircular groove, a worm wheel is arranged between the fixed rotating table and the semicircular groove, and the worm wheel is engaged with the worm.

[0014] Preferably, the ratchet wheel anti-reverse mechanism comprises a second circular groove formed on the other surface of the movable sleeve pipe, a crank is rotatably installed at the center position of the second circular groove, a clamping plate is fixedly installed at the lower end of the crank, a ratchet wheel is rotatably installed at the lower end of the second circular groove, and the ratchet wheel is engaged with the clamping plate.

[0015] Preferably, the sealing sleeve pipe is located at the lower end of the outer surface of the connecting outer pipe, through grooves are formed at the same positions of the sealing sleeve pipe, the connecting outer pipe and the sealing inner pipe, a bolt is installed through the three through grooves, and a sealing ring is arranged between the sealing inner pipe and the connecting outer pipe.

[0016] Preferably, wire connection ports are rotatably installed at both ends of the connecting valve, a clamping groove is formed at one end of the connecting valve inside each wire connection port, the clamping groove is in close contact with one side of the bent arm, and a port thread is fixedly installed on the outer side of each wire connection port.

[0017] Preferably, the upper and lower surfaces of the movable sleeve are fixedly provided with rotating arms, the rotating arms are rotatably installed at the rear end of the fixed square tube, and the rear ends of the plurality of movable sleeves are connected to a plurality of groups of movable sleeves through the rotating arms.

[0018] A rubber connector manufacturing method is performed by using the above connector, and includes the following steps.

[0019] S1, a rubber inner tube is preformed by extrusion, two wire connection ports are rotatably installed on both sides through a connecting valve, a hard pipe sleeve is rotatably installed on one side of the wire connection port, a cable is arranged in the hard pipe sleeve, and a metal braid is woven along the outer layer of the rubber inner tube;

[0020] S2, the hard pipe sleeve is quickly connected to the equipment through the connecting valve, the rear end is movably connected to the outer pipe and the sealing inner pipe through a bolt, and a sealing channel of the equipment cable end is formed;

[0021] S3, the movable sleeve is rotatably installed at the rear end of the fixed square tube through the rotating arm, and the rear ends of the plurality of movable sleeves are connected to the rear end of the previous movable sleeve through the rotating arm.

[0022] Compared with the prior art, the rubber connector and the manufacturing method thereof have the following beneficial effects:

[0023] The rubber connector and the manufacturing method thereof adopt a triple composite protection system of rubber, metal braid and hard pipe sleeve, the rubber adheres to the inner tube to play a sealing and shock-absorbing role, the metal braid on the outer layer provides axial tensile and torsional resistance, the hard pipe sleeve on the outermost layer cooperates with the worm gear mechanism and the ratchet anti-reverse mechanism to perform angle fine adjustment of the hard pipe sleeve, so as to adapt to complex working environments;

[0024] The rubber connector and the manufacturing method thereof adopt a double-head quick connector, which is convenient for operators to quickly connect the equipment with external cables, is suitable for high-frequency multi-axis motion, and has dynamic interference risk between the cable and the mechanical structure. The segmented structure can effectively reduce the influence of vibration, and the complex mechanical structure can limit the wiring space of the connecting line. The segmented support structure can better adapt to irregular space layout.

[0025] The rubber connector and the manufacturing method thereof adopt a worm gear mechanism and a ratchet anti-reverse mechanism. The equipment needs to be adjusted in angle according to the working environment during installation or maintenance. The segmented hard support can flexibly adjust the direction of the connecting line to ensure the stability of the connection. The integrated ratchet anti-reverse mechanism makes the angle adjustment more stable. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure schematic view of the rubber connector and the manufacturing method thereof;

[0027] Figure 2 It is a metal braid structure schematic view of the rubber connector and the manufacturing method thereof;

[0028] Figure 3 A schematic diagram of the hard sleeve structure of the rubber connecting piece and the manufacturing method thereof of the present application;

[0029] Figure 4 A sectional view of the rubber connecting piece and the manufacturing method thereof of the present application;

[0030] Figure 5 A schematic diagram of the connecting valve structure of the rubber connecting piece and the manufacturing method thereof of the present application;

[0031] Figure 6 A schematic diagram of the worm and gear mechanism structure of the rubber connecting piece and the manufacturing method thereof of the present application;

[0032] Figure 7 A schematic diagram of the ratchet anti-reverse mechanism structure of the rubber connecting piece and the manufacturing method thereof of the present application;

[0033] Figure 8 A schematic diagram of the Figure 6 enlarged view of A in the rubber connecting piece and the manufacturing method thereof of the present application;

[0034] Figure 9 A schematic diagram of the Figure 7 enlarged view of A in the rubber connecting piece and the manufacturing method thereof of the present application.

[0035] 1, connecting valve; 2, wiring port; 3, clamping groove; 4, port thread; 5, adapter cone tube; 6, fixed square tube; 7, movable sleeve; 8, latch; 9, rotating arm; 10, adapter thread; 101, rubber inner tube; 102, metal braid; 103, hard sleeve; 104, embedded thread groove; 105, sealing inner tube; 106, connecting outer tube; 107, sealing ring; 108, sealing sleeve; 109, through groove; 201, empty groove; 202, bent arm; 203, rotating seat; 204, limiting clamping piece; 301, driving motor; 302, worm; 303, worm gear; 304, semicircular groove; 305, fixed rotating table; 401, second circular groove; 402, crank; 403, clamping plate; 404, ratchet. DETAILED DESCRIPTION

[0036] The following description is provided to enable any person skilled in the art to practice the present application. The preferred embodiments of the present application described below are only examples of the present application and other obvious variants can be thought of by those skilled in the art.

[0037] As Figures 1-9The rubber connector and its manufacturing method are shown. The connector includes a connecting valve 1, with wiring ports 2 rotatably mounted at both ends. A rigid sleeve 103 is rotatably mounted at the right wiring port 2. A connecting valve mechanism is provided inside the connecting valve 1. A connecting outer tube 106 is rotatably mounted at the rear end of the rigid sleeve 103. A sealing sleeve 108 is movably mounted at the rear end of the connecting outer tube 106. A sealing inner tube 105 is movably mounted inside the connecting outer tube 106. A connecting tapered tube 5 is fixedly mounted at the rear end of the sealing sleeve 108. A fixed square tube 6 is fixedly mounted at the rear end of the connecting tapered tube 5. A movable sleeve 7 is movably mounted at the rear end of the fixed square tube 6. A worm gear mechanism is fixedly mounted on one side of the fixed square tube 6 and the movable sleeve 7. A ratchet anti-reverse mechanism is fixedly mounted on the other side of the fixed square tube 6 and the movable sleeve 7.

[0038] like Figure 2 , Figure 3 As shown, a rubber inner tube 101 is fixedly installed inside the rigid sleeve 103. A metal braided mesh 102 is fixedly installed between the rubber inner tube 101 and the rigid sleeve 103. A connecting thread 10 is fixedly installed at the rear end of the rigid sleeve 103. A fitting threaded groove 104 is provided on the inner wall of the front end of the rigid sleeve 103. The metal braided mesh 102 wraps around the outside of the rubber inner tube 101, forming an effective wrapping layer on the outer surface of the rubber inner tube 101, providing axial tensile and torsional resistance. The outermost rigid sleeve 103 provides the most direct protection, avoiding cable damage caused by long-term processing.

[0039] like Figure 4 As shown, the sealing sleeve 108 is located at the lower end of the outer surface of the connecting outer tube 106. The sealing sleeve 108, the connecting outer tube 106 and the sealing inner tube 105 are all provided with through grooves 109 at the same position. The three through grooves 109 are connected by pins 8. A sealing ring 107 is provided between the sealing inner tube 105 and the connecting outer tube 106. The sealing sleeve 108, the connecting outer tube 106 and the sealing inner tube 105 are limited and fixed by the pins 8. When disassembly is required, the pins 8 can be removed to disassemble. The sealing ring 107 forms a seal between the rubber inner tube 101 and the sealing inner tube 105.

[0040] like Figure 5 As shown, the connecting valve mechanism includes rotating seats 203 fixedly installed on both sides of the outer surface of the connecting valve 1. A bent arm 202 is rotatably installed between every two rotating seats 203. A slot 201 is opened at the lower end of the bent arm 202 on the outer surface of the connecting valve 1. A limiting clip 204 is rotatably installed at one end of one side of the bent arm 202. The wiring ports 2 on both sides are inserted into the interior of the connecting valve 1. By rotating the bent arm 202, the lower end of the clip moves along the slot 201 and is limited after fitting into the slot 3.

[0041] The connecting valve 1 is rotatably installed with a connecting port 2 at both ends, each connecting port 2 is provided with a clamping groove 3 at one end close to the inside of the connecting valve 1, and the clamping groove 3 is in close contact with one side of the bending arm 202, and each connecting port 2 is fixedly installed with a port thread 4 on the outside, and the hard pipe sleeve 103 is fixedly installed on one side of the connecting valve 1 by rotating the fitting thread groove 104 to cooperate with the port thread 4.

[0042] The upper and lower surfaces of the movable sleeve 7 are fixedly installed with a rotating arm 9 at the front end, and the rotating arm 9 is rotatably installed at the rear end of the fixed square tube 6, and a plurality of movable sleeves 7 are connected in sequence through the rotating arm 9 according to the length of the equipment cable, and are adjusted in angle by the worm and gear mechanism and the ratchet anti-reverse mechanism.

[0043] As shown in Figure 8 , the worm and gear mechanism includes a semicircular groove 304 provided on one side surface of the movable sleeve 7, one end of the semicircular groove 304 is fixedly installed with a driving motor 301, the output end of the driving motor 301 is fixedly installed with a worm 302, the center position of the semicircular groove 304 is rotatably installed with a fixed turntable 305, a worm gear 303 is arranged between the fixed turntable 305 and the semicircular groove 304, the worm gear 303 is engaged with the worm 302, the movable sleeve 7 is rotatably installed at the rear end of the fixed square tube 6 through the rotating arm 9, the driving motor 301 drives the worm 302 to rotate, the worm gear 303 on one side is engaged to rotate, so that the movable sleeve 7 rotates along the upper end of the semicircular groove 304, and the cable is placed in the movable sleeve 7, and the angle can be adjusted according to the use.

[0044] As shown in Figure 7 , Figure 9 , the ratchet anti-reverse mechanism includes a second circular groove 401 provided on the other surface of the movable sleeve 7, a crank 402 is rotatably installed at the center position of the second circular groove 401, a clamping plate 403 is fixedly installed at the lower end of the crank 402, a ratchet wheel 404 is rotatably installed at the lower end of the second circular groove 401, the ratchet wheel 404 is engaged with the clamping plate 403, when the device is in a static state, the clamping plate 403 is engaged with the ratchet wheel 404, and the cable is in a fixed state, the movable sleeve 7 provides rigid support, and the angle is adjusted through the worm and gear mechanism, the ratchet wheel 404 limits the clamping plate 403, avoids reverse rotation, and makes the angle adjustment more stable, and when it is necessary to release, the operator controls the crank 402 to drive the clamping plate 403 to rotate.

[0045] A manufacturing method of a rubber connecting piece is adopted by the connecting piece, comprising the following steps:

[0046] S1, the rubber inner tube 101 is pre-pressed into shape, and is woven along the outer layer of the rubber inner tube 101;

[0047] S2, the hard sleeve 103 is connected with the equipment through the connecting valve 1, the rear end is movably installed and connected with the outer pipe 106 and the sealing inner pipe 105 through the bolt 8, and a sealed channel is formed;

[0048] S3, the movable sleeve 7 is rotatably installed to the rear end of the fixed square pipe 6 through the rotating arm 9, and the rear end of each movable sleeve 7 is connected to the rear end of the previous movable sleeve 7 through the rotating arm 9.

[0049] Working principle: the cable on one side of the equipment is sleeved and then inserted into the connecting valve 1 through the wiring port 2, after the cable is inserted into the connecting valve 1, the operator rotates the bending arm 202 along the rotating seat 203, one side of the bending arm 202 is a clamping block structure, one side of the bending arm 202 is rotated along the clamping groove 3, and the two sides are limited and fixed through the bending arm 202, and the limiting clamp 204 rotatably installed on the upper end of one side of the bending arm 202 is secondarily limited, so that the two wiring ports 2 are prevented from being separated.

[0050] The port thread 4 is fixedly installed at the rear end of the wiring port 2, the inner wall of the hard sleeve 103 close to one side of the wiring port 2 is provided with a matching embedded thread groove 104, so that the hard sleeve 103 is fixedly installed on one side of the wiring port 2, the metal woven net 102 is woven in the hard sleeve 103, the rubber inner pipe 101 is fixedly installed in the metal woven net 102, and the metal woven net 102 provides anti-torque for the rubber inner pipe 101. Especially, the robot arm will generate high-frequency multi-axis motion when working, the equipment cable is wrapped by strengthening, and wear, collision and scratching in the industrial environment are effectively avoided. The outermost hard sleeve 103 wraps the rubber inner pipe 101 and the metal woven net 102 together to form a seal, so that a large amount of dust in the industrial environment is prevented from entering the equipment cable end.

[0051] The connecting outer pipe 106 is provided with a matching thread 10 at the inner wall of the front end, the hard sleeve 103 and the connecting outer pipe 106 are fixedly connected by rotating, the sealing inner pipe 105 is slidably installed in the connecting outer pipe 106, the sealing ring 107 is arranged between the sealing inner pipe 105 and the connecting outer pipe 106, the sealing ring 107 forms a closed space in the inner space of the front end of the connecting outer pipe 106, so that dust is prevented from entering the connecting piece, the sealing sleeve 108 is arranged at the lower end of the outer side of the connecting outer pipe 106, the bolt 8 is arranged at the same position of the sealing sleeve 108, the connecting outer pipe 106 and the sealing inner pipe 105, and the bolt 8 is fixedly connected.

[0052] The sealing sleeve 108 is fixedly installed with the matching taper pipe 5 at the rear end, the matching taper pipe 5 is a transition connection between the cable itself and the port, the fixed square pipe 6 is fixedly installed at the rear end of the matching taper pipe 5, the fixed square pipe 6 is the end of the equipment and provides secondary support for the cable, and a plurality of movable sleeves 7 are connected according to the length of the equipment cable at the rear end of the fixed square pipe 6. The plurality of movable sleeves 7 provide adjustable support for the cable.

[0053] Each two active sleeve 7 is connected by the swing arm 9, one side surface is installed with worm gear mechanism, as the rotation driving part of active sleeve 7, through driving motor 301 to drive worm 302 to rotate, worm 302 drives worm gear 303 to rotate along with fixed turntable 305 to drive swing arm 9, so that active sleeve 7 rotates along with the front end active sleeve 7.

[0054] The other side surface is provided with ratchet anti-reverse mechanism, the upper end of swing arm 9 is provided with ratchet 404 to provide anti-reverse effect, when the angle adjustment is completed and needs to be kept fixed, clamping plate 403 is clamped to one side of ratchet 404, when the angle needs to be adjusted or released, crank 402 is rotated along with second circular groove 401 to release ratchet 404, the operator adjusts the angle according to the working environment, and the gap is left between the plurality of active sleeves 7, which provides more flexible wiring space to better adapt to irregular space layout.

[0055] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A rubber connector, comprising a connecting valve (1), characterized in that: Both ends of the connecting valve (1) are rotatably equipped with wiring ports (2). The wiring port (2) on the right side is rotatably equipped with a rigid sleeve (103). The connecting valve (1) is equipped with a connecting valve mechanism. The rear end of the rigid sleeve (103) is rotatably equipped with a connecting outer tube (106). The rear end of the connecting outer tube (106) is movably equipped with a sealing sleeve (108). The interior of the connecting outer tube (106) is movably equipped with a sealing inner tube (105). The rear end of the sealing sleeve (108) is fixedly equipped with a connecting tapered tube (5). The rear end of the connecting tapered tube (5) is fixedly equipped with a fixed square tube (6). The rear end of the fixed square tube (6) is movably equipped with a movable sleeve (7). A worm gear mechanism is fixedly installed on one side surface between the fixed square tube (6) and the movable sleeve (7). A ratchet anti-reverse mechanism is fixedly installed on the other side surface between the fixed square tube (6) and the movable sleeve (7). The worm gear mechanism includes a semi-circular groove (304) formed on one side surface of the movable sleeve (7). A drive motor (301) is fixedly installed at one end of the semi-circular groove (304), and a worm (302) is fixedly installed at the output end of the drive motor (301). A fixed turntable (305) is rotatably installed at the center of the semi-circular groove (304). A worm wheel (303) is provided between the fixed turntable (305) and the semi-circular groove (304), and the worm wheel (303) meshes with the worm (302). The ratchet anti-reverse mechanism includes a second circular groove (401) on the other surface of the movable sleeve (7). A crank (402) is rotatably mounted at the center of the second circular groove (401). A retaining plate (403) is fixedly mounted at the lower end of the crank (402). A ratchet (404) is rotatably mounted at the lower end of the second circular groove (401). The ratchet (404) engages with the retaining plate (403).

2. The rubber connector according to claim 1, characterized in that: The connecting valve mechanism includes rotating seats (203) fixedly installed on both sides of the outer surface of the connecting valve (1). A bent arm (202) is rotatably installed between each two rotating seats (203). A slot (201) is opened at the lower end of the bent arm (202) on the outer surface of the connecting valve (1), and a limit clamp (204) is rotatably installed at one end of one side of the bent arm (202).

3. A rubber connector according to claim 1, characterized in that: A rubber inner tube (101) is fixedly installed inside the rigid tube sleeve (103). A metal braided mesh (102) is fixedly installed between the rubber inner tube (101) and the rigid tube sleeve (103). A connecting thread (10) is fixedly installed at the rear end of the rigid tube sleeve (103). A fitting thread groove (104) is provided on the inner wall of the front end of the rigid tube sleeve (103).

4. A rubber connector according to claim 3, characterized in that: The sealing sleeve (108) is located at the lower end of the outer surface of the connecting outer tube (106). The sealing sleeve (108), the connecting outer tube (106) and the sealing inner tube (105) are all provided with through grooves (109) at the same position. The three through grooves (109) are connected by pins (8). A sealing ring (107) is provided between the sealing inner tube (105) and the connecting outer tube (106).

5. A rubber connector according to claim 2, characterized in that: Both ends of the connecting valve (1) are rotatably installed with wiring ports (2). Each wiring port (2) has a slot (3) at one end inside the connecting valve (1) that is close to it. The slot (3) fits against one side of the bent arm (202). Each wiring port (2) has a port thread (4) fixedly installed on its outer side.

6. A rubber connector according to claim 1, characterized in that: The upper and lower surfaces of the movable sleeve (7) are fixedly equipped with rotating arms (9), which are rotatably installed at the rear end of the fixed square tube (6). Multiple movable sleeves (7) are connected in sequence through rotating arms (9).

7. A method for manufacturing a rubber connector, using a rubber connector as described in any one of claims 1-6, characterized in that: Includes the following steps: S1. The rubber inner tube (101) is pre-extruded and molded. The two wiring ports (2) are rotated and installed to both sides through the connecting valve (1). The rigid tube sleeve (103) is rotated and installed to one side of the wiring port (2). The cable is placed in it and the metal braided mesh (102) is woven along the outer layer of the rubber inner tube (101). S2. The rigid tube sleeve (103) is quickly connected to the equipment through the connecting valve (1). The rear end is connected to the outer tube (106) and the sealed inner tube (105) through the pin (8) to form a sealed channel at the end of the equipment cable. S3. The movable sleeve (7) is rotated and installed to the rear end of the fixed square tube (6) via the rotating arm (9). The movable sleeves (7) connected to the rear end in sequence are all connected to the rear end of the previous movable sleeve (7) via the rotating arm (9).

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