A waterproof joint with good sealing

Abstract

This invention provides a waterproof connector with good sealing performance, relating to the field of waterproof connector technology, including cables; it also includes a waterproof mechanism, the waterproof mechanism comprising a first outer hexagonal ring, a locking ring on one side of the first outer hexagonal ring, three sets of spacer rings and three sets of intermediate rings between the first outer hexagonal ring and the locking ring, the three sets of spacer rings and the three sets of intermediate rings being staggered, three sets of hinge rods between adjacent sets of spacer rings, the three layers of hinge rods being staggered, three sets of connecting holes on the side wall of each set of intermediate rings, an external threaded ring connected to the other side wall of the locking ring, and nine sets of arc panels hinged to the hinge rods, arranged in three layers, the three layers of arc panels being staggered. This invention provides a waterproof mechanism that effectively prevents moisture from penetrating into the cable through the connection, extending the cable's service life and ensuring the long-term stable and reliable operation of the electrical system.

Description

Technical Field

[0001] This invention relates to the field of waterproof joint technology, and more specifically, to a waterproof joint with good sealing performance. Background Technology

[0002] In practical applications of electrical systems, cables, as the core carriers of power transmission and signal transmission, often need to be connected to various external devices, instruments, and control devices to extend circuits and expand functions. However, under current technological conditions, the connection between cables and external devices often becomes the weakest link in the entire electrical system, with poor sealing and waterproofing. When these cables are used in outdoor environments, underground facilities, damp workshops, ship cabins, or other places where they are easily exposed to moisture, rain, condensation, or other liquids, moisture can easily seep into the cable through tiny gaps at the connection, gradually eroding the cable's insulation layer and conductor core. Over time and with changes in ambient temperature, this seepage will intensify. The accumulation of moisture inside the cable not only reduces its insulation performance, causing electrical faults such as leakage and short circuits, but also accelerates the oxidation and corrosion of the metal conductors, leading to increased resistance, severe overheating, and ultimately cable damage.

[0003] Besides the direct hazards caused by insufficient sealing and waterproofing, the poor sealing at the joints allows corrosive substances such as dust, dirt, oil, and salt spray from the external environment to penetrate along with moisture, further accelerating the aging and degradation of the cable materials. This leads to a rapid decline in the cable's mechanical strength and electrical performance. In cold regions, the infiltrated moisture may even freeze and expand at low temperatures, causing mechanical damage to the cable's internal structure, resulting in insulation cracking and conductor breakage. Furthermore, the sealing failure at the joints is often insidious, making it difficult to detect in the early stages of the fault. By the time obvious abnormalities appear in the electrical system, the cable has often suffered irreversible damage, requiring complete replacement. This not only increases maintenance costs and downtime losses but may also lead to production interruptions, equipment shutdowns, and even safety accidents due to sudden failures. Frequent replacement of damaged cables and joints also increases the company's operating costs and maintenance workload, reducing equipment reliability and economy. Therefore, there is an urgent need to design a waterproof joint with good sealing performance to solve these problems. Summary of the Invention

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, the present invention provides a waterproof joint with good sealing performance to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A waterproof connector with good sealing performance includes a cable; it also includes a waterproof mechanism, the waterproof mechanism including a first external hexagonal ring, a locking ring on one side of the first external hexagonal ring, three sets of spacer rings and three sets of intermediate rings between the first external hexagonal ring and the locking ring, the three sets of spacer rings and the three sets of intermediate rings being staggered, three layers of hinge rods on the three spacer rings, three hinge rods equally spaced in each layer, the three layers of hinge rods being staggered, three sets of connecting holes on the side wall of each set of intermediate rings, an external threaded ring connected to the other side wall of the locking ring, and an arc panel hinged to the hinge rod, the arc panel having nine sets in three layers, the three layers of arc panels being staggered.

[0006] Preferably, the inner wall of the external threaded ring is threaded with an internal hexagonal ring, and the first external hexagonal ring is provided with a rubber sleeve.

[0007] Preferably, the inner wall of the rubber cylinder is provided with multiple sets of friction strips, and a pressure ring is sleeved on one end of the outer wall of the rubber cylinder. One side of the pressure ring abuts against the side wall of the hexagonal inner ring, and the other side abuts against the inner wall of the locking ring.

[0008] Preferably, the outer wall of the external threaded ring is rotatably connected to an abutment ring, and a second external hexagonal ring is connected to one side of the abutment ring. The second external hexagonal ring is rotatably connected to the outer wall of the locking ring.

[0009] Preferably, a rotating ring is connected to one side of the second outer hexagonal ring, and the inner sidewall of the rotating ring is provided with multiple sets of locking rods.

[0010] Preferably, the rotating ring has three sets of following rings, each set of following rings corresponding to each set of intermediate rings, and the outer wall of the following ring has multiple sets of locking grooves adapted to the locking rod, and the locking rod is embedded in the locking groove.

[0011] Preferably, each set of arc panels has a hinge hole at one end, the hinge rod is inserted into the hinge hole and rotatably connected to the hinge hole, and a barrier strip is provided on the side wall of the other end of the arc panel.

[0012] Preferably, each set of rotating rings has three sets of pressure rods on its inner sidewall, and the outer sidewall of the arc panel has a slot at one end, the slot being located on one side of the barrier strip, and the pressure rods are used in conjunction with the slot.

[0013] Preferably, one end of the outer wall of the first layer of three sets of arc panels is connected to a first variable pitch plate, one end of the outer wall of the second layer of three sets of arc panels is connected to a second variable pitch plate, and one end of the outer wall of the third layer of three sets of arc panels is connected to a third variable pitch plate. The lengths of the first, second, and third variable pitch plates increase progressively, and each of the first, second, and third variable pitch plates is used in conjunction with a corresponding pressure bar.

[0014] Preferably, each set of the arc panel has a push spring connected to its inner sidewall, the push spring passes through a connecting hole and is connected to a pressure plate, and the inner sidewall of the pressure plate abuts against the outer sidewall of the rubber cylinder.

[0015] (III) Beneficial Effects Compared with existing technologies, this invention provides a waterproof connector with good sealing performance, which has the following beneficial effects: This invention solves the problem of poor sealing at cable connections. By setting multiple sets of arc panels at different levels, and cooperating with push springs and pressure plates to form a multi-point, all-round compression and wrapping of the rubber cylinder, the rubber cylinder can tightly fit the outer surface of the cable, forming multiple sealing barriers around the cable. The multiple sets of friction strips set on the inner wall of the rubber cylinder further enhance the interlocking force with the cable surface, ensuring that there are no gaps between the sealing material and the cable. This multi-layer progressive sealing structure can effectively resist the intrusion of harmful substances such as external moisture, humidity, dust, and oil, effectively preventing moisture from penetrating into the cable through the connection, extending the service life of the cable, and ensuring the long-term stable and reliable operation of the electrical system.

[0016] This invention employs a progressive, layered pressurization structure. By configuring variable-pitch plates with increasing lengths and decreasing tilt angles for different levels of the arc panels, the three arc panels are subjected to compressive force sequentially when the operator rotates the outer hexagonal ring to move the pressure rod, rather than bearing all the pressure simultaneously. The advantage of this design is that it rationally decomposes the huge torque force that originally needed to be applied all at once into three consecutive small torque force stages. At each stage, the operator only needs to apply a relatively small and basically constant force to gradually complete the full compression of the rubber cylinder. The entire operation is easy and labor-saving, reducing labor intensity. At the same time, this segmented and progressive pressurization method also ensures the uniformity and symmetry of the force on the rubber cylinder, avoiding problems such as uneven deformation of the rubber material and poor sealing effect caused by local stress concentration. This makes the sealing pressure distribution around the cable more reasonable and the sealing quality more reliable and stable.

[0017] This invention achieves locking and anti-loosening functions for the waterproof connector through a mechanical transmission structure, ensuring a stable seal once installation and locking are completed. After the operator rotates multiple pressure rods into the slots for initial locking, rotating the outer hexagonal ring again causes the entire waterproof mechanism to rotate synchronously via the transmission chains of the intermediate ring, spacer ring, and locking ring, since the pressure rods are already embedded in the slots. At this time, the frictional resistance generated between the abutment ring and the outer wall of the equipment acts on the second outer hexagonal ring, requiring the continued rotation to overcome increasingly greater resistance. This resistance is transmitted to the arc panel through the barrier strip, applying additional clamping force to the push spring and further enhancing the clamping force of the rubber sleeve on the cable. Simultaneously, the cooperation between the locking rod and the locking groove, as well as the linkage mechanism between the rotating ring and the following ring, constitute multiple anti-loosening safeguards, ensuring that there is no relative displacement or loosening between the various transmission components. The entire waterproof connector structure is robust and reliable, providing a guarantee for the long-term safe operation of the cable connection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a waterproof connector with good sealing performance according to the present invention; Figure 2 This is a schematic diagram of the internal hexagonal ring and the swivel ring in this invention; Figure 3 In this invention Figure 2 A schematic diagram of the cross-sectional structure; Figure 4 In this invention Figure 2 A schematic diagram of the exploded structure; Figure 5 This is a cross-sectional view of the intermediate ring and the spacer ring in this invention. Figure 6 This is a schematic diagram of the structure of the rotating ring and the following ring in this invention; Figure 7 This is a cross-sectional view of the first external hexagonal ring and the external threaded ring in this invention; Figure 8 This is a cross-sectional view of the rubber cylinder and the rotating ring in this invention; Figure 9 This is a schematic diagram of the arc panel and pressure plate in this invention; Figure 10 This is a schematic diagram of the pressure plate and push spring in this invention; Figure 11 This is a schematic diagram of the structure of the first and second pitch plates in this invention.

[0019] In the diagram: 11. Cable; 21. First external hexagonal ring; 22. Locking ring; 23. Spacer ring; 24. Intermediate ring; 25. Hinge rod; 26. Connecting hole; 27. External threaded ring; 28. Arc panel; 29. ​​Internal hexagonal ring; 210. Rubber tube; 211. Friction strip; 212. Pressure ring; 213. Abutment ring; 214. Second external hexagonal ring; 215. Rotating ring; 216. Locking rod; 217. Rotating ring; 218. Locking groove; 219. Hinge hole; 220. Barrier strip; 221. Pressure rod; 222. Slot; 223. First pitch plate; 224. Second pitch plate; 225. Third pitch plate; 226. Push spring; 227. Pressure plate. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0023] Please see Figures 1-11A waterproof connector with good sealing performance includes a cable 11; it also includes a waterproof mechanism, which includes a first external hexagonal ring 21, a locking ring 22 on one side of the first external hexagonal ring 21, three sets of spacer rings 23 and three sets of intermediate rings 24 between the first external hexagonal ring 21 and the locking ring 22, the three sets of spacer rings 23 and the three sets of intermediate rings 24 are staggered, three layers of hinge rods 25 are provided on the three spacer rings 23, three hinge rods 25 are equally spaced in each layer, the three layers of hinge rods 25 are staggered, three sets of connecting holes 26 are opened on the side wall of each set of intermediate rings 24, an external threaded ring 27 is connected to the other side wall of the locking ring 22, and an arc panel 28 is hinged to the hinge rod 25. Nine sets of panels 28 are arranged in three layers, with the three layers of arc panels 28 staggered. An internal hexagonal ring 29 is threadedly connected to the inner wall of the external threaded ring 27. A rubber cylinder 210 is installed inside the first external hexagonal ring 21. Multiple friction strips 211 are provided on the inner wall of the rubber cylinder 210. A pressure ring 212 is fitted onto one end of the outer wall of the rubber cylinder 210. One side of the pressure ring 212 abuts against the side wall of the internal hexagonal ring 29, and the other side abuts against the inner wall of the locking ring 22. An abutment ring 213 is rotatably connected to the outer wall of the external threaded ring 27. A second external hexagonal ring 214 is connected to one side of the abutment ring 213. The second external hexagonal ring 214 is rotatably connected to the outer wall of the locking ring 22. A rotating ring 215 is connected to one side of the second external hexagonal ring 214. Multiple sets of locking rods 216 are provided on the inner sidewall of the rotating ring 215. Three sets of following rings 217 are provided inside the rotating ring 215, each corresponding to a middle ring 24. Multiple sets of locking grooves 218 adapted to the locking rods 216 are provided on the outer sidewall of the following rings 217. The locking rods 216 are embedded in the locking grooves 218. A hinge hole 219 is provided at one end of each set of curved panels 28. A hinge rod 25 is inserted into the hinge hole 219 and rotatably connected to it. A barrier strip 220 is provided on the other sidewall of the curved panel 28. Three sets of pressure rods 221 are provided on the inner sidewall of each set of following rings 217. A slot 222 is provided at one end of the outer sidewall of the curved panel 28, located on one side of the barrier strip 220. The pressure rods 221 and... The slot 222 is used in conjunction with the first layer of three sets of arc panels 28. One end of the outer wall of the first layer of three sets of arc panels 28 is connected to the first variable pitch plate 223. One end of the outer wall of the second layer of three sets of arc panels 28 is connected to the second variable pitch plate 224. One end of the outer wall of the third layer of three sets of arc panels 28 is connected to the third variable pitch plate 225. The lengths of the first variable pitch plate 223, the second variable pitch plate 224 and the third variable pitch plate 225 increase step by step. The first variable pitch plate 223, the second variable pitch plate 224 and the third variable pitch plate 225 are all used in conjunction with the corresponding pressure rod 221. The inner wall of each set of arc panels 28 is connected to the push spring 226. The push spring 226 passes through the connecting hole 26 and is connected to the pressure plate 227. The inner wall of the pressure plate 227 abuts against the outer wall of the rubber cylinder 210.

[0024] In this invention, the external threaded ring 27 is threaded to the equipment. First, the operator needs to pass the cable 11 through the rubber sleeve 210 and connect it to the equipment. Then, the operator uses an external tool to rotate the first external hexagonal ring 21. The first external hexagonal ring 21 drives the external threaded ring 27 to rotate synchronously through the intermediate ring 24, spacer ring 23, and locking ring 22, threading the external threaded ring 27 to the equipment until the abutment ring 213 abuts against the outer wall of the equipment without applying force. Afterward, the operator needs to hold the first external hexagonal ring 21 with one hand and use the other hand to... The tool rotates the second external hexagonal ring 214 in the opposite direction to the first external hexagonal ring 21. The second external hexagonal ring 214 drives the abutment ring 213 to rotate along the external thread ring 27, and also drives the rotating ring 215 to rotate. The rotating ring 215 drives three sets of rotating rings 217 to rotate synchronously through multiple sets of locking rods 216 on the inner side wall. The three sets of rotating rings 217 drive the three sets of pressure rods 221 connected to their inner side walls to rotate. Each set of pressure rods 221 abuts against the side wall of the corresponding arc panel 28. There are nine sets of curved panels 28 in total, with three sets forming a layer. Each layer of three sets of curved panels 28 is hinged to the corresponding hinge rods 25. Figure 8 It can be seen that as the rotating ring 217 drives the pressure rod 221 to rotate along the arc panel 28, according to Figure 11 It can be seen that the lengths of the first pitch plate 223, the second pitch plate 224, and the third pitch plate 225, which connect the upper and lower three-layer arc panel 28, increase sequentially, while their inclinations decrease sequentially. Therefore, the three-layer pressure bar 221 will contact the corresponding pitch plates one after another. Figure 9As can be seen, the three layers of arc panels 28 are staggered. The pressure rods 221 continuously move along the arc panels 28. The lowest pressure rod 221 first contacts the third pitch plate 225, and then compresses the lowest push spring 226. The pressure plate 227 at the other end of the push spring 226 is compressed and then compresses the outer wall of the rubber cylinder 210, so that the rubber cylinder 210 at this position wraps and clamps the cable 11. When the lowest pressure rod 221 moves along the inclined surface of the third pitch plate 225 to the highest point of the third pitch plate 225, the middle pressure rod 221 moves to the starting end of the second pitch plate 224. The pressure rods 221 continue to rotate, and the lowest pressure rod... 221 continues to move along the highest surface of the third pitch plate 225. The pressure rod 221 of the middle layer begins to move along the inclined surface of the second pitch plate 224, thereby compressing the push spring 226 of the middle layer. The pressure plate 227 at the other end of the push spring 226 is compressed and compresses the outer wall of the rubber cylinder 210, thereby causing the rubber cylinder 210 at this position to wrap and clamp the cable 11. This continues until the pressure rod 221 of the middle layer moves along the inclined surface of the second pitch plate 224 to the highest point of the second pitch plate 224. Similarly, the pressure rod 221 of the uppermost layer moves to the starting end of the first pitch plate 223. Then, the pressure rod 221 continues to rotate, and the pressure rod 221 of the lowermost layer moves to the starting end of the first pitch plate 223. 1. Continuing to move along the highest surface of the third pitch plate 225, the pressure rod 221 of the middle layer also continues to move along the highest surface of the second pitch plate 224. The uppermost pressure rod 221 begins to move along the inclined surface of the first pitch plate 223, thereby compressing the uppermost push spring 226. The pressure plate 227 at the other end of the push spring 226 is compressed, pressing the rubber cylinder 210, causing the rubber cylinder 210 at this position to wrap and clamp the cable 11, until the uppermost pressure rod 221 moves to the highest point of the first pitch plate 223. Finally, the pressure rod 221 is rotated so that all three layers of pressure rods 221 are inserted into the corresponding slots 222, thus completing the electrical... The sealing and locking of cable 11; the purpose of the staggered arrangement of the first pitch plate 223, the second pitch plate 224 and the third pitch plate 225 is to make it possible for the operator to rotate the second outer hexagonal ring 214 with less force. If the first pitch plate 223, the second pitch plate 224 and the third pitch plate 225 were the same, the operator would need to use three times the force to complete the wrapping and clamping of cable 11. The different inclination angles of the first pitch plate 223, the second pitch plate 224 and the third pitch plate 225 and the different lengths of the three are neutralized so that the force required by the operator to turn the second outer hexagonal ring 214 in the three stages is basically the same. Finally, the operator needs to rotate the first outer hexagonal ring 21 again. Since all the pressure rods 221 are engaged in the slots 222, the rotation of the first outer hexagonal ring 21 will also cause the second outer hexagonal ring 214 to rotate synchronously. Because the abutment ring 213 is in contact with the outer wall of the equipment, the rotation of the second outer hexagonal ring 214 will create frictional resistance between the abutment ring 213 and the equipment. This resistance will prevent the second outer hexagonal ring 214 from rotating. Therefore, the abutment ring 213 will become increasingly tighter against the outer wall of the equipment until it can no longer rotate. Simultaneously, because the nine pressure rods 221 abut against the corresponding barrier strips 220, at this time... The rotational torque is transmitted to the second external hexagonal ring 214 through the nine barrier bars 220. The barrier bars 220 provide additional thrust to the arc panel 28, causing the push spring 226 to further push the pressure plate 227 to clamp the rubber cylinder 210, thereby clamping the cable 11. In this invention, the operator can use an external tool to turn out the internal hexagonal ring 29, thereby releasing the lock on the pressure ring 212. Then the rubber cylinder 210 can be taken out and replaced. After inserting the new rubber cylinder 210, the internal hexagonal ring 29 is turned into the external threaded ring 27 to squeeze and fix the pressure ring 212, thereby locking the rubber cylinder 210.

[0025] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. They will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be elaborated upon in this invention. Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A waterproof connector with good sealing performance, comprising a cable (11); and further comprising a waterproof mechanism, said waterproof mechanism comprising a first external hexagonal ring (21), characterized in that: A locking ring (22) is provided on one side of the first external hexagonal ring (21). Three sets of spacer rings (23) and three sets of intermediate rings (24) are provided between the first external hexagonal ring (21) and the locking ring (22). The three sets of spacer rings (23) and the three sets of intermediate rings (24) are staggered. Three layers of hinge rods (25) are provided on the three spacer rings (23). Three hinge rods (25) are equally spaced in each layer. The three layers of hinge rods (25) are staggered. Three sets of connecting holes (26) are opened on the side wall of each set of intermediate rings (24). An external threaded ring (27) is connected to the other side wall of the locking ring (22). An arc panel (28) is hinged to the hinge rod (25). Nine sets of arc panels (28) are provided, divided into three layers. The three layers of arc panels (28) are staggered. An abutment ring (213) is rotatably connected to the outer side wall of the external threaded ring (27). One side of the abutment ring (213) A second external hexagonal ring (214) is connected, and a rotating ring (215) is connected to one side of the second external hexagonal ring (214). The inner wall of the rotating ring (215) is provided with multiple sets of locking rods (216). The rotating ring (215) is provided with three sets of rotating rings (217). The inner wall of each set of rotating rings (217) is provided with three sets of pressure rods (221). One end of the outer wall of the first layer of three sets of arc panels (28) is connected to a first variable pitch plate (223). The second layer of three One end of the outer wall of the arc panel (28) of the group is connected to a second variable pitch plate (224), and one end of the outer wall of the arc panel (28) of the third layer is connected to a third variable pitch plate (225). The lengths of the first variable pitch plate (223), the second variable pitch plate (224) and the third variable pitch plate (225) increase step by step. The first variable pitch plate (223), the second variable pitch plate (224) and the third variable pitch plate (225) are all used in conjunction with the corresponding pressure bar (221).

2. The waterproof joint with good sealing performance according to claim 1, characterized in that: The inner wall of the external threaded ring (27) is threaded with an internal hexagonal ring (29), and the first external hexagonal ring (21) is provided with a rubber cylinder (210).

3. A waterproof joint with good sealing performance according to claim 2, characterized in that: The inner wall of the rubber cylinder (210) is provided with multiple sets of friction strips (211), and one end of the outer wall of the rubber cylinder (210) is fitted with a pressure ring (212). One side of the pressure ring (212) abuts against the side wall of the inner hexagonal ring (29), and the other side abuts against the inner wall of the locking ring (22).

4. A waterproof joint with good sealing performance according to claim 3, characterized in that: The second outer hexagonal ring (214) is rotatably connected to the outer wall of the locking ring (22).

5. A waterproof joint with good sealing performance according to claim 4, characterized in that: Each set of the rotating ring (217) corresponds to each set of the intermediate ring (24). The outer wall of the rotating ring (217) is provided with multiple sets of locking grooves (218) adapted to the locking rod (216). The locking rod (216) is embedded in the locking groove (218).

6. A waterproof joint with good sealing performance according to claim 5, characterized in that: Each set of arc panel (28) has a hinge hole (219) at one end, and the hinge rod (25) is inserted into the hinge hole (219) and rotatedly connected to the hinge hole (219). The other side wall of the arc panel (28) is provided with a barrier strip (220).

7. A waterproof joint with good sealing performance according to claim 6, characterized in that: The outer side wall of the arc panel (28) is provided with a slot (222), which is located on one side of the barrier strip (220). The pressure rod (221) is used in conjunction with the slot (222).

8. A waterproof joint with good sealing performance according to claim 2, characterized in that: Each set of arc panel (28) has a push spring (226) connected to the inner wall. The push spring (226) passes through the connecting hole (26) and is connected to a pressure plate (227). The inner wall of the pressure plate (227) abuts against the outer wall of the rubber cylinder (210).

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