Cable combination device for electromechanical installation

Abstract

The invention discloses a cable combination device for mechanical and electrical installation, and belongs to the technical field of motor installation, the cable combination device comprises a first connecting mechanism and a second connecting mechanism matched with the first connecting mechanism, and the first connecting mechanism and the second connecting mechanism comprise copper wire rods arranged at the middle positions of the back surfaces of an internal thread sleeve and an external thread sleeve; the arc-shaped rubber seats are distributed at equal intervals by taking the copper wire rod as a circle center to form a barrel structure, and the arc-shaped rubber seats can move outwards along the copper wire rod in a diffusion manner; the sliding rods are distributed on the outer side of the arc-shaped rubber base at equal intervals with the copper wire rod as the circle center and connected with the inner threaded sleeve through bearings, the other ends of the sliding rods are connected with the fixing ring, and the sliding rods are symmetrically sleeved with sliding sleeves. According to the invention, through mutual cooperation between the arc-shaped rubber seats, cables with different thicknesses can be combined conveniently, and meanwhile, the cables are spirally arranged on the inner sides of the arc-shaped rubber seats, so that the cables are prevented from falling off under the action of axial force, and the connection firmness is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of motor installation, and in particular to a cable assembly device for electromechanical installation. Background Art

[0002] Electromechanical equipment refers to machinery, electrical appliances and electrical automation equipment. When installing electromechanical equipment, cables need to be sorted and routed. When the electromechanical equipment is far away from the power supply area, multiple cables need to be combined, so a cable combination device is required.

[0003] An existing cable assembly device, such as a cable assembly device for electromechanical installation shown in authorization announcement number CN117810900B, clamps the cable by a limit assembly, and fixes the cable sheath and the arc block to each other by heating. However, in this process, on the one hand, the cable sheath is damaged, which poses a safety hazard to the cable during actual use; on the other hand, only cables of fixed thickness can be connected, and cables of different thicknesses cannot be connected. Therefore, the present invention provides a cable assembly device for electromechanical installation. Summary of the invention

[0004] The main purpose of the present application is to provide a cable combination device for electromechanical installation, which facilitates the combination of cables of different thicknesses through the mutual cooperation between the arc-shaped rubber seats. At the same time, by spirally arranging the cables on the inner side of the arc-shaped rubber seats, it prevents them from falling off under the action of axial force, thereby ensuring the firmness of the connection.

[0005] To achieve the above-mentioned object, the present application provides a cable assembly device for electromechanical installation, comprising a first connecting mechanism and a second connecting mechanism that cooperates with the first connecting mechanism, wherein the ends of the first connecting mechanism and the second connecting mechanism are respectively provided with an internal thread sleeve and an external thread sleeve that cooperate with each other, and a connecting head and a connecting sleeve that cooperate with each other are respectively fixed at the middle position inside the internal thread sleeve and the external thread sleeve, and the first connecting mechanism and the second connecting mechanism include: A copper wire rod is arranged at a middle position between the inner thread sleeve and the back of the outer thread sleeve, and is fixed to the connector and the connecting sleeve; The arc-shaped rubber seat is evenly spaced with the copper wire rod as the center to form a cylindrical structure, and the arc-shaped rubber seat can move outward along the copper wire rod in a diffused manner, and a hinge seat is fixedly connected at the middle position of the outer side of the arc-shaped rubber seat; The sliding rod is evenly distributed on the outside of the arc-shaped rubber seat with the copper wire rod as the center, and is connected to the internal threaded sleeve through a bearing, and the other end of the sliding rod is connected to a fixed ring. The sliding rod is symmetrically sleeved with sliding sleeves, and the two sliding sleeves are hinged to the hinge seat through a hinge rod, and a compression spring is sleeved on the sliding rod on the side of the sliding sleeve close to the bearing and the fixed ring.

[0006] Preferably, a built-in groove is provided inside the arc-shaped rubber seat, and an arc-shaped rubber sheet sliding along the built-in groove is arranged inside the built-in groove, and a threaded rubber strip is fixed inside the cylinder formed by the arc-shaped rubber seat along its axial direction.

[0007] Preferably, the slide rod is connected to the inner ring of the bearing, and the internal threaded sleeve is connected to the outer ring of the bearing, and a slideway corresponding to the arc-shaped rubber seat is provided on the inner ring of the bearing, and the arc-shaped rubber seat slides along the slideway.

[0008] Preferably, arc-shaped protective strips are symmetrically arranged on the outer side of the slide rod, and sliding grooves are opened at both ends of the arc-shaped protective strip, and a liquid inlet groove is opened at the middle position inside the arc-shaped protective strip, and sliding grooves are opened at both ends of the liquid inlet groove.

[0009] Preferably, sliding blocks sliding along the inside of the sliding groove are fixed on both sides of the sliding sleeve, and a sliding rod sliding along the inside of the sliding groove is fixedly connected to one side of the sliding block.

[0010] Preferably, a fixing sleeve is provided at the middle position of the sliding rod, and a telescopic rod connected to the center position of the hinge seat is fixed on one side of the fixing sleeve, and a connecting hose connected to the liquid inlet tank is connected to the bottom of one side of the telescopic rod sleeve.

[0011] Preferably, a fixing seat is fixed on the outer side of the fixing ring at equal intervals along its circumferential direction, and a threaded hole cooperating with the threaded rod is provided on the fixing seat, and a rubber sealing block is connected to one end of the threaded rod, and grooves for sliding of the arc-shaped rubber sealing strip are provided on both sides of the rubber sealing block.

[0012] The benefits of the present application are as follows: first, when the cable is inserted into the first connecting mechanism and the second connecting mechanism, the copper wire rod is driven to rotate by rotating the internal threaded sleeve and the external threaded sleeve, and the cable moves along the threaded groove of the copper wire rod to the inside of the cylinder formed by the arc-shaped rubber seat, so that the cable is spirally wound around the copper wire rod, and at the same time, the spiral groove formed by the threaded rubber strip inside the cylinder corresponds to the threaded groove, so that the cable can be spirally located inside the cylinder along the spiral groove and the inside of the threaded groove, and at the same time, the articulated seat and the threaded rubber strip are used to wrap and clamp the cable, so that during the use of the electromechanical equipment, the cable is spirally arranged inside the cylinder, which prevents it from falling off under the action of axial force, thereby ensuring the firmness of the connection; Secondly, since the thickness of the cables is also different, when the cables enter the cylinder, the cables will be squeezed to push each arc-shaped rubber seat to move, so that the cylinder will expand, and the gap formed between two adjacent arc-shaped rubber seats after expansion will be filled by the arc-shaped rubber sheet. During the movement of the arc-shaped rubber seat, since the hinge seat and the two sliding sleeves are hinged by the hinge rod, the sliding sleeves are pushed to move along the sliding rod to both ends, thereby squeezing the compression spring. At the same time, the rebound force of the compression spring is used to ensure that the arc-shaped rubber seat always wraps around the cable, which is convenient for limiting the clamping of cables of different thicknesses and improving practical performance. Finally, during the movement of the arc-shaped rubber seat, the hydraulic oil inside the telescopic rod is squeezed, so that the hydraulic oil inside the telescopic rod is introduced into one of the liquid inlet grooves through one of the connecting hoses, and enters into the other liquid inlet groove through the conduit, and then enters into the sliding groove to push the sliding rod and the slider fixed on the sliding sleeve to move. In this process, since the telescopic rod is in a vertical state and contacts the arc-shaped rubber seat, the arc-shaped rubber seat will not tilt during the movement, ensuring the stability of the cylinder during expansion, and using the telescopic rod and the two hinged rods to form two right-angled triangles, thereby further improving the stability during clamping, and since the slider and the sliding rod move the sliding sleeve under the push of the hydraulic oil, the hydraulic oil is used to contact the compression spring, thereby improving the stability during the cable clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a schematic diagram of an overall partial cross-section of the present invention.

[0015] Figure 3 It is a schematic diagram of the overall structure of the first connecting mechanism of the present invention.

[0016] Figure 4 yes Figure 3 A in the figure is an enlarged structural diagram.

[0017] Figure 5 It is a schematic cross-sectional view of the local structure of the first connecting mechanism of the present invention.

[0018] Figure 6 yes Figure 5 Schematic diagram of the local structure.

[0019] Figure 7 It is a schematic diagram of the outer structure of the fixing ring of the present invention.

[0020] In the above figure, 100, the first connecting mechanism; 101, the internal threaded sleeve; 102, the connecting head; 103, the bearing; 104, the sliding rod; 105, the sliding sleeve; 106, the arc-shaped protective strip; 107, the connecting hose; 108, the hinged rod; 109, the fixing ring; 110, the telescopic rod; 111, the hinged seat; 112, the arc-shaped rubber seat; 113, the arc-shaped rubber sheet; 114, the slide; 115, the copper wire rod; 116, the compression spring; 117, the threaded rubber strip; 118, the fixing sleeve; 119, the sliding block; 120, the liquid inlet groove; 121, the sliding groove; 122, the sliding rod; 123, the sliding groove; 124, the threaded rod; 125, the fixing seat; 126, the rubber sealing block; 127, the arc-shaped rubber sealing strip; 200, the second connecting mechanism; 201, the external threaded sleeve; 202, the connecting sleeve. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0023] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0024] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0025] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] See also Figure 1-Figure 7As shown, this embodiment provides a cable assembly device for electromechanical installation, including a first connecting mechanism 100 and a second connecting mechanism 200 that cooperates with the first connecting mechanism 100, wherein the ends of the first connecting mechanism 100 and the second connecting mechanism 200 are respectively provided with an internal thread sleeve 101 and an external thread sleeve 201 that cooperate with each other, and a connecting head 102 and a connecting sleeve 202 that cooperate with each other are respectively fixed at the middle position inside the internal thread sleeve 101 and the external thread sleeve 201, and the first connecting mechanism 100 and the second connecting mechanism 200 include: The copper wire rod 115 is arranged at the middle position between the inner thread sleeve 101 and the back of the outer thread sleeve 201, and is fixed to the connector 102 and the connector sleeve 202; The arc-shaped rubber seat 112 is evenly spaced with the copper wire rod 115 as the center to form a cylindrical structure, and the arc-shaped rubber seat 112 can move outward along the copper wire rod 115 in a diffused manner, and a hinge seat 111 is fixedly connected to the middle position of the outer side of the arc-shaped rubber seat 112; The slide rod 104 is evenly spaced and distributed on the outside of the arc-shaped rubber seat 112 with the copper wire rod 115 as the center, and is connected to the internal threaded sleeve 101 through the bearing 103, and the other end of the slide rod 104 is connected to the fixed ring 109. The slide sleeves 105 are symmetrically sleeved on the slide rod 104, and the two slide sleeves 105 are hinged to the hinge seat 111 through the hinge rod 108, and a compression spring 116 is sleeved on the slide rod 104 on the side of the slide sleeve 105 close to the bearing 103 and the fixed ring 109.

[0028] In this embodiment, a built-in groove is provided inside the arc-shaped rubber seat 112, and an arc-shaped rubber sheet 113 sliding along the built-in groove is provided inside the built-in groove, and a threaded rubber strip 117 is fixed along the axial direction inside the cylinder formed by the arc-shaped rubber seat 112. When in use, under the squeezing effect of the cable, each arc-shaped rubber seat 112 is pushed to move, so that the cylinder expands, and the gap formed between two adjacent arc-shaped rubber seats 112 after expansion is filled by the arc-shaped rubber sheet 113. At the same time, the spiral groove formed by the threaded rubber strip 117 inside the cylinder corresponds to the thread groove, so that the cable can be spirally located inside the cylinder along the spiral groove and the inside of the thread groove. At the same time, the hinged seat 111 and the threaded rubber strip 117 are used to wrap and clamp the cable. During the use of the electromechanical equipment, the cable is spirally arranged inside the cylinder, which prevents it from falling off under the action of the axial force, thereby ensuring the firmness of the connection.

[0029] like Figure 6As shown, in this embodiment, the slide rod 104 is connected to the inner ring of the bearing 103, and the internal threaded sleeve 101 is connected to the outer ring of the bearing 103, and a slideway 114 corresponding to the arc-shaped rubber seat 112 is provided on the inner ring of the bearing 103, and the arc-shaped rubber seat 112 slides along the slideway 114.

[0030] In this embodiment, arc-shaped protection strips 106 are symmetrically arranged on the outer side of the sliding rod 104, and sliding grooves 123 are opened at both ends of the arc-shaped protection strip 106, and a liquid inlet groove 120 is opened at the middle position inside the arc-shaped protection strip 106, and sliding grooves 121 are opened at both ends of the liquid inlet groove 120.

[0031] In this embodiment, sliders 119 sliding along the inside of the sliding groove 123 are fixed on both sides of the sliding sleeve 105, and a sliding rod 122 sliding along the inside of the sliding groove 121 is fixedly connected to one side of the slider 119. When in use, the sliding rod 122 is pushed to slide along the inside of the sliding groove 121 under the left and right sides of the hydraulic oil, and the slider 119 slides along the inside of the sliding groove 123 synchronously.

[0032] In this embodiment, a fixed sleeve 118 is fixedly provided at the middle position of the slide rod 104, and a telescopic rod 110 connected to the center position of the hinge seat 111 is fixed on one side of the fixed sleeve 118, and a connecting hose 107 connected to the liquid inlet tank 120 is connected to the bottom of one side of the sleeve of the telescopic rod 110. When in use, the hydraulic oil inside the telescopic rod 110 is squeezed, so that the hydraulic oil inside the telescopic rod 110 is introduced into the liquid inlet tank 120 through the connecting hose 107, and then enters the interior of the sliding groove 121 to push the sliding rod 122 and the fixed sleeve 105. The slider 119 moves, and during this process, since the telescopic rod 110 is in a vertical state and contacts the arc-shaped rubber seat 112, the arc-shaped rubber seat 112 will not tilt during the movement, ensuring the stability of the cylinder when it expands, and the telescopic rod 110 and the two hinged rods 108 form two right-angled triangles, thereby further improving the stability during clamping, and because the slider 119 and the sliding rod 122 move the sleeve 105 under the push of hydraulic oil, the hydraulic oil is used to contact the compression spring 116, thereby improving the stability during the cable clamping process.

[0033] In this embodiment, the liquid inlet grooves 120 inside the two symmetrically arranged arc-shaped protective strips 106 are connected to each other through a conduit, and a one-way valve is installed on the connecting hose 107 connecting the two arc-shaped protective strips 106, and the flow directions of the two one-way valves are opposite. When in use, the hydraulic oil inside the telescopic rod 110 is introduced into the interior of one of the liquid inlet grooves 120 through one of the connecting hoses 107, and enters the interior of the other liquid inlet groove 120 through the conduit.

[0034] like Figure 7 As shown, in this embodiment, a fixing seat 125 is fixed to the outer side of the fixing ring 109 at equal intervals along its circumferential direction, and a threaded hole that cooperates with the threaded rod 124 is opened on the fixing seat 125, and one end of the threaded rod 124 is connected to a rubber sealing block 126, and grooves for sliding of an arc-shaped rubber sealing strip 127 are opened on both sides of the rubber sealing block 126. When in use, after the cable connection is completed, the threaded rod 124 is manually rotated to move the rubber sealing block 126 toward the inner side of the fixing ring 109, so that the cable can be clamped at the same time, and the ring body formed by multiple rubber sealing blocks 126 and multiple arc-shaped rubber sealing strips 127 can also be used to seal the end of the cylinder formed by the arc-shaped rubber seat 112 and the arc-shaped rubber sheet 113.

[0035] In summary: First, two cables on the electromechanical device are respectively inserted into the first connecting mechanism 100 and the second connecting mechanism 200, and then the two cables are butted together by the threaded fit between the internal threaded sleeve 101 and the external threaded sleeve 201, and the connector 102 and the connecting sleeve 202 are simultaneously butted together, thereby connecting the device; When the cable is inserted into the first connection mechanism 100 and the second connection mechanism 200, the copper wire rod 115 is driven to rotate by rotating the internal threaded sleeve 101 and the external threaded sleeve 201. Under the friction effect of the inner wall of the cylinder, the cable moves along the threaded groove of the copper wire rod 115 to the inside of the cylinder formed by the arc-shaped rubber seat 112, so that the cable is spirally wound around the copper wire rod 115. At the same time, the spiral groove formed by the threaded rubber strip 117 inside the cylinder corresponds to the threaded groove, so that the cable can be spirally located inside the cylinder along the spiral groove and the inside of the threaded groove. At the same time, the articulated seat 111 and the threaded rubber strip 117 are used to wrap and clamp the cable. During the use of the electromechanical equipment, the cable is spirally arranged inside the cylinder, which prevents it from falling off under the action of axial force, thereby ensuring the firmness of the connection. At the same time, since the thickness of the cables is also different, for thicker cables, when the cables enter the cylinder, the arc-shaped rubber seats 112 are pushed to move under the squeezing effect of the cables, so that the cylinder expands, and the gaps formed between the two adjacent arc-shaped rubber seats 112 after expansion are filled by the arc-shaped rubber sheets 113. During the movement of the arc-shaped rubber seats 112, since the hinged seat 111 and the two sliding sleeves 105 are hinged by the hinged rod 108, the sliding sleeves 105 are pushed to move toward both ends along the sliding rod 104, thereby squeezing the compression spring 116. At the same time, the rebound force of the compression spring 116 is used to ensure that the arc-shaped rubber seats 112 always wrap and clamp the cables, which is convenient for limiting and clamping cables of different thicknesses, thereby improving practical performance. At the same time, during the movement of the arc-shaped rubber seat 112, the hydraulic oil inside the telescopic rod 110 is squeezed, so that the hydraulic oil inside the telescopic rod 110 is introduced into one of the liquid inlet grooves 120 through one of the connecting hoses 107, and enters into the other liquid inlet groove 120 through the conduit, and then enters into the sliding groove 121 to push the sliding rod 122 and the slider 119 fixed on the sliding sleeve 105 to move. In this process, since the telescopic rod 110 is in a vertical state and conflicts with the arc-shaped rubber seat 112, the arc-shaped rubber seat 112 will not tilt during the movement process, ensuring the stability of the cylinder when expanding. The telescopic rod 110 and the two hinged rods 108 are used to form two right triangles, thereby further improving the stability during clamping. The slider 119 and the sliding rod 122 move the sleeve 105 under the push of the hydraulic oil, so that the hydraulic oil is used to resist the compression spring 116, thereby improving the stability of the cable clamping process. At the same time, it is explained that in the process of the cylinder expanding outward, the telescopic rod 110 and the sleeve 105 cooperate with each other using hydraulic oil, so that when the connecting device shakes, the negative pressure effect formed by the hydraulic oil will not cause the cylinder to shake during the shaking of the connecting device.

Claims

1. A cable assembly device for electromechanical installation, comprising a first connection mechanism (100) and a second connection mechanism (200) cooperating with the first connection mechanism (100), wherein: The ends of the first connecting mechanism (100) and the second connecting mechanism (200) are respectively provided with an internal thread sleeve (101) and an external thread sleeve (201) that match each other, and a connecting head (102) and a connecting sleeve (202) that match each other are respectively fixed at the middle position inside the internal thread sleeve (101) and the external thread sleeve (201), and the first connecting mechanism (100) and the second connecting mechanism (200) include: A copper wire rod (115) is disposed at a middle position between the inner thread sleeve (101) and the back of the outer thread sleeve (201), and is fixed to the connecting head (102) and the connecting sleeve (202); The arc-shaped rubber seat (112) is evenly spaced with the copper wire rod (115) as the center to form a cylindrical structure, and the arc-shaped rubber seat (112) can move outward along the copper wire rod (115) in a diffuse manner, and a hinge seat (111) is fixedly connected at a middle position outside the arc-shaped rubber seat (112); The slide rod (104) is evenly spaced and distributed on the outer side of the arc-shaped rubber seat (112) with the copper wire rod (115) as the center of the circle, and is connected to the internal threaded sleeve (101) through the bearing (103), and the other end of the slide rod (104) is connected to the fixed ring (109), the slide sleeves (105) are symmetrically sleeved on the slide rod (104), and the two slide sleeves (105) are hinged to the hinge seat (111) through the hinge rod (108), and a compression spring (116) is sleeved on the slide rod (104) on the side of the slide sleeve (105) close to the bearing (103) and the fixed ring (109).

2. A cable assembly device for electromechanical installation according to claim 1, characterized in that: The arc-shaped rubber seat (112) is provided with an internal groove, and an arc-shaped rubber sheet (113) is arranged inside the internal groove to slide along the internal groove, and a threaded rubber strip (117) is fixed inside the cylinder formed by the arc-shaped rubber seat (112) along its axial direction.

3. A cable assembly device for electromechanical installation according to claim 1, characterized in that: The slide rod (104) is connected to the inner ring of the bearing (103), and the internal threaded sleeve (101) is connected to the outer ring of the bearing (103). A slideway (114) corresponding to the arc-shaped rubber seat (112) is provided on the inner ring of the bearing (103), and the arc-shaped rubber seat (112) slides along the slideway (114).

4. A cable assembly device for electromechanical installation according to claim 1, characterized in that: The outer sides of the slide bars (104) are symmetrically provided with arc-shaped protection strips (106), and sliding grooves (123) are provided at both ends of the arc-shaped protection strips (106). A liquid inlet groove (120) is provided at a middle position inside the arc-shaped protection strip (106), and sliding grooves (121) are provided at both ends of the liquid inlet groove (120).

5. A cable assembly device for electromechanical installation according to claim 4, characterized in that: Slide blocks (119) that slide along the inside of the slide groove (123) are fixed to both sides of the slide sleeve (105), and a slide rod (122) that slides along the inside of the slide groove (121) is fixedly connected to one side of the slide block (119).

6. A cable assembly device for electromechanical installation according to claim 4, characterized in that: A fixing sleeve (118) is fixedly provided at the middle position of the sliding rod (104), and a telescopic rod (110) connected to the center position of the hinge seat (111) is fixedly provided on one side of the fixing sleeve (118), and a connecting hose (107) in communication with the liquid inlet tank (120) is connected to the bottom of one side of the sleeve of the telescopic rod (110).

7. A cable assembly device for electromechanical installation according to claim 1, characterized in that: The outer side of the fixing ring (109) is fixed with fixing seats (125) at equal intervals along the circumferential direction thereof, and the fixing seats (125) are provided with threaded holes that cooperate with the threaded rod (124), one end of the threaded rod (124) is connected to a rubber sealing block (126), and grooves for sliding an arc-shaped rubber sealing strip (127) are provided on both sides of the rubber sealing block (126).

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