Power supply cable maintenance device

Abstract

A power supply cable maintenance device disclosed by the present invention comprises a split type cable outer frame, an adjusting type driver, a visual inspection assembly and a repairing mechanism, the split type cable outer frame comprises two groups of symmetrically arranged half-cylinder shells and a splicing assembly arranged between the two groups of half-cylinder shells, a guide groove is formed between the two groups of half-cylinder shells, and the adjusting type driver is arranged in the guide groove. The splicing assembly comprises four groups of plugging ports formed in the end part of one group of semi-cylindrical shells and four groups of plugging rods mounted at the end part of the other group of semi-cylindrical shells, the plugging rods are correspondingly inserted into the plugging ports in a penetrating manner, limiting ports are formed in the outer ends of the plugging rods, limiting bolts are inserted into the limiting ports in a threaded manner, and the limiting bolts are inserted into the semi-cylindrical shells in a penetrating manner; adjusting grooves are formed in the surfaces of the half-cylinder shells. According to the high-altitude power supply cable maintenance device designed by the invention, the high-altitude cable can be automatically detected and repaired, an automatic operation mode is adopted, and the repair efficiency and safety of the power supply cable are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of cable maintenance, in particular to a power supply cable maintenance device. Background Art

[0002] Power supply cable is an electrical device used to transmit electricity. It is usually made of one or more strands twisted together and protected by an insulating layer. These cables are used to transmit electricity inside buildings, industrial facilities, power transmission systems, communication systems and other places. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of power systems, including 1-500kV and above various voltage levels, various insulated power cables. According to the installation method, cables can be divided into aerial cables, buried cables, bridge cables, underwater cables, etc., among which aerial cables are installed at a higher height to ensure their safety during operation.

[0003] However, the existing high-altitude power supply cables have the following problems in daily use: Affected by temperature, rainy and snowy weather and birds, the high-altitude power supply cables may have damaged cable insulation, such as corrosion and cracks, which require staff to maintain and repair the cables. However, due to the high height of the cable installation, the maintenance and repair of the cable insulation is very inconvenient and there is a lag. Therefore, it is necessary to design corresponding technical solutions to solve the existing technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a power supply cable maintenance device, which solves the problem that the insulation surface of the high-altitude power supply cable may be damaged due to the influence of temperature, rainy and snowy weather and birds, for example, corrosion and cracks occur, and workers are required to maintain and repair the cable. However, due to the high installation height of the cable, the maintenance and inspection operations of the cable insulation surface are very inconvenient and there is a lag, which is a technical problem.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power supply cable maintenance device, including a split cable outer frame, an adjustable driver, a visual detection component and a repair mechanism, the split cable outer frame includes two groups of symmetrically arranged half-cylinder shells and a splicing component arranged between the two groups of half-cylinder shells, a guide groove is formed between the two groups of half-cylinder shells, the splicing component includes four groups of plug interfaces opened at the end of one group of half-cylinder shells and four groups of plug rods installed at the end of the other group of half-cylinder shells, the plug rods are correspondingly inserted into the plug interfaces, wherein the The outer end of the plug rod is provided with a limit opening, a limit bolt is inserted through the inner thread of the limit opening, the limit bolt is inserted into the semi-cylinder shell, an adjustment groove is provided on the surface of the semi-cylinder shell, the adjustable driver is divided into two groups and respectively inserted into the two groups of adjustment grooves, the visual detection components are divided into two groups and respectively installed in the two groups of semi-cylinder shells, the repair mechanism is divided into two groups and is located on the inner side of the visual detection component, and a battery is also installed in the semi-cylinder shell, and the battery is used to supply power for the operation of the adjustable driver, the visual detection component and the repair mechanism;

[0006] The adjustable driver comprises a positioning adjuster, a clamping ring, a mounting frame, a roller and a driving motor, wherein the positioning adjuster is inserted into the adjusting groove and the inner end is connected to the clamping ring, the mounting frame is fixed in the clamping ring, the roller is rotatably mounted on the mounting frame, the driving motor is fixed to one side of the mounting frame and the power output end is connected to the roller, and the roller is in contact with the power supply cable;

[0007] The visual detection component includes a semi-ring, a fill light bar and a camera, the semi-ring is installed at the end of the guide groove, the fill light bar is divided into two groups and symmetrically installed on both sides of the semi-ring, the camera is divided into several groups and evenly distributed on the semi-ring, the camera is connected to a controller through a line, and the controller is connected to an adjustable driver and a repair mechanism through a line;

[0008] The repair mechanism includes a material storage container, a stirring hot melter, a material guide pipe, a valve and a repair pipe. The material storage container is located directly above the semi-cylinder shell and the lower end is connected to the repair pipe through the material guide pipe. The repair pipe is built into the guide groove, the stirring hot melter is installed inside the material storage container, and the valve is installed on the material guide pipe.

[0009] As a preferred embodiment of the present invention, the positioning adjuster includes a guide block, a sliding rod, a ball and a limit nut. The guide blocks are divided into two groups and are symmetrically installed on the inner wall of the adjustment groove. A sliding groove is formed between the two groups of guide blocks. The sliding rod is inserted into the sliding groove and passes through the ball. The ball contacts the inner wall of the guide block. The limit nut is threaded on the outer end of the sliding rod and conflicts with the semi-cylinder shell.

[0010] As a preferred embodiment of the present invention, the outer side of the guide block is formed into a plane structure and the inner side is formed into an inclined structure, and the thickness of one end of the guide block is smaller than the thickness of the other end.

[0011] As a preferred embodiment of the present invention, the roller includes a wheel body and a rubber jacket wrapped around the wheel body, and a surface of the rubber jacket is processed to form a plurality of groups of anti-skid bumps, and the anti-skid bumps are in contact with the power supply cable.

[0012] As a preferred embodiment of the present invention, the material storage container comprises a container body and a cover arranged on the top of the container body, the interior of the container body is filled with repair material and the bottom is connected to the repair pipe through a pipeline.

[0013] As a preferred embodiment of the present invention, the stirring hot melter includes a motor, a driving gear, a driven gear, an outer tube, a conductive rod and an electric heating plate. The motor is installed on the inner side of the cover and the power output end is connected to the driving gear. The driving gear is meshed with the driven gear. The outer tube is fixed on the driven gear. The conductive rod is built into the outer tube and connected to an external circuit. The electric heating plate is divided into several groups and is evenly installed on the outer tube.

[0014] As a preferred embodiment of the present invention, the inner ends of several groups of the electric heating plates are in contact with the conductive rods and are distributed in a spiral shape.

[0015] As a preferred embodiment of the present invention, the repair pipe includes an arc-shaped outer shell, an arc-shaped inner tube, a branch pipe, a nozzle and a valve body, the arc-shaped outer shell is fixed on the inner wall of the guide groove, the arc-shaped inner tube is built into the arc-shaped outer shell, the branch pipes are divided into several groups and are evenly installed on the arc-shaped inner tube, the nozzle is installed on the end of the branch pipe, and the valve body is installed on the branch pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention designs a device for maintaining high-altitude power supply cables, the high-altitude power supply cable maintenance device comprises a split cable outer frame, an adjustable driver, a visual detection component and a repair mechanism. When a section of the high-altitude cable needs to be inspected and maintained, the staff can install the split cable outer frame on the cable and adjust the adjustable driver so that the driver can contact the cable and drive the high-altitude power supply cable maintenance device to move laterally along the cable. During the movement, the visual detection component is used to visually monitor the insulating outer layer of the cable. When the cable insulation layer is found to be damaged, the liquid cable insulation layer material is applied to the damaged position through the repair mechanism, so as to achieve the purpose of quickly repairing the cable insulation layer.

[0018] 2. The high-altitude power supply cable maintenance device designed by the present invention can realize automatic detection and repair of high-altitude cables, and adopts an automated operation method, which greatly improves the efficiency and safety of power supply cable repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall structure diagram of the present invention;

[0020] Figure 2 This is a structural diagram of the adjustable driver installation of the present invention;

[0021] Figure 3 This is a structural diagram of the positioning regulator of the present invention;

[0022] Figure 4 This is a structural diagram of the stirring hot melter of the present invention;

[0023] Figure 5 This is a structural diagram of the repair pipe described in the present invention.

[0024] In the figure: 1, half-cylinder shell; 2, guide groove; 3, plug interface; 4, plug rod; 5, limit port; 6, limit bolt; 7, adjustment slot; 8, battery; 9, positioning regulator; 10, clamping ring; 11, mounting frame; 12, roller; 13, driving motor; 14, half ring; 15, fill light strip; 16, camera; 17, controller; 18, storage container; 19, stirring hot melter; 20, guide pipe; 21, valve; 22, Repair pipe; 23. Guide block; 24. Slide rod; 25. Ball; 26. Limit nut; 27. Slide groove; 28. Wheel body; 29. ​​Rubber jacket; 30. Anti-skid bump; 31. Container body; 32. Cover; 33. Motor; 34. Drive gear; 35. Driven gear; 36. Outer tube; 37. Conductive rod; 38. Electric heating plate; 39. Arc-shaped outer shell; 40. Arc-shaped inner tube; 41. Branch pipe; 42. Sprinkler; 43. Valve body. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-5The present invention provides a technical solution: a power supply cable maintenance device, including a split cable outer frame, an adjustable driver, a visual detection component and a repair mechanism, the split cable outer frame includes two groups of half-cylinder shells 1 symmetrically arranged and a splicing component arranged between the two groups of half-cylinder shells 1, a guide groove 2 is formed between the two groups of half-cylinder shells 1, the splicing component includes four groups of plug interfaces 3 opened at the end of one group of half-cylinder shells 1 and four groups of plug rods 4 installed at the end of the other group of half-cylinder shells 1, the plug rods 4 are correspondingly inserted into the plug interfaces 3, wherein the plug The outer end of the connecting rod 4 is provided with a limit opening 5, and a limit bolt 6 is inserted through the inner thread of the limit opening 5. The limit bolt 6 is inserted into the semi-cylinder shell 1. The surface of the semi-cylinder shell 1 is provided with an adjustment groove 7. The adjustable driver is divided into two groups and is respectively inserted into the two groups of adjustment grooves 7. The visual detection components are divided into two groups and are respectively installed in the two groups of semi-cylinder shells 1. The repair mechanism is divided into two groups and is located on the inner side of the visual detection component. A battery 8 is also installed in the semi-cylinder shell 1. The battery 8 is used to supply power for the operation of the adjustable driver, the visual detection component and the repair mechanism.

[0027] The adjustable driver includes a positioning adjuster 9, a snap ring 10, a mounting frame 11, a roller 12 and a driving motor 13. The positioning adjuster 9 is inserted into the adjusting groove 7 and the inner end is connected to the snap ring 10. The mounting frame 11 is fixed in the snap ring 10. The roller 12 is rotatably mounted on the mounting frame 11. The driving motor 13 is fixed to one side of the mounting frame 11 and the power output end is connected to the roller 12. The roller 12 is in contact with the power supply cable.

[0028] The visual inspection component includes a semi-ring 14, a fill light bar 15 and a camera 16. The semi-ring 14 is installed at the end of the guide groove 2. The fill light bar 15 is divided into two groups and symmetrically installed on both sides of the semi-ring 14. The camera 16 is divided into several groups and evenly distributed on the semi-ring 14. The camera 16 is connected to the controller 17 through a line. The controller 17 is connected to the adjustable driver and the repair mechanism through the line. The camera 16 performs visual image recognition on the cable surface. When the surface of the cable is found to be damaged, the signal can be transmitted to the controller 17, and the controller 17 controls the repair mechanism to perform repair processing;

[0029] The repair mechanism includes a storage container 18, a stirring hot melter 19, a material guide pipe 20, a valve 21 and a repair pipe 22. The storage container 18 is located directly above the semi-cylinder shell 1 and the lower end is connected to the repair pipe 22 through the material guide pipe 20. The repair pipe 22 is built into the guide groove 2. The stirring hot melter 19 is installed in the storage container 18. The valve 21 is installed on the material guide pipe 20. The repair material is hot-melted by the stirring hot melter 19 and the molten repair material is guided outward.

[0030] Further improvement, such as Figure 3As shown, the positioning adjuster 9 includes a guide block 23, a slide rod 24, a ball 25 and a limit nut 26. The guide blocks 23 are divided into two groups and are symmetrically installed on the inner wall of the adjustment groove 7. A slide groove 27 is formed between the two groups of guide blocks 23. The slide rod 24 is inserted into the slide groove 27 and passes through the ball 25. The ball 25 contacts the inner wall of the guide block 23. The limit nut 26 is threadedly arranged on the outer end of the slide rod 24 and contacts the semi-cylinder shell 1. The slide rod 24 is pulled to move laterally. When the slide rod 24 moves laterally along the slide groove 27, the slide rod 24 can be moved inward and outward synchronously, so that the roller 12 can contact the cable.

[0031] Further improvement, such as Figure 3 As shown, the outer side of the guide block 23 is processed into a flat structure and the inner side is processed into an inclined structure. The thickness of one end of the guide block 23 is less than the thickness of the other end. This design makes it easy for the slide bar 24 to move laterally during the movement, thereby adjusting the position of the roller 12 so that the roller 12 can contact the cable.

[0032] Further improvement, such as Figure 2 As shown, the roller 12 includes a wheel body 28 and a rubber jacket 29 wrapped around the wheel body 28. The surface of the rubber jacket 29 is processed to have several groups of anti-skid protrusions 30. The anti-skid protrusions 30 are in contact with the power supply cable. This design makes it easy for the roller 12 to move along the power supply cable.

[0033] Further improvement, such as Figure 4 As shown, the storage container 18 includes a container body 31 and a cover 32 arranged on the top of the container body 31. The interior of the container body 31 is filled with repair materials and the bottom is connected to the repair pipe 22 through a pipeline. The repair materials are used to repair the damaged surface of the cable.

[0034] Further improvement, such as Figure 4 As shown, the stirring hot melter 19 includes a motor 33, a driving gear 34, a driven gear 35, an outer tube 36, a conductive rod 37 and an electric heating plate 38. The motor 33 is installed on the inner side of the cover 32 and the power output end is connected to the driving gear 34. The driving gear 34 is meshed with the driven gear 35. The outer tube 36 is fixed on the driven gear 35. The conductive rod 37 is built into the outer tube 36 and is connected to the external circuit. The electric heating plate 38 is divided into several groups and is evenly installed on the outer tube 36. The driving gear 34 is driven to rotate by the motor 33. The driving gear 34 drives the driven gear 35 to rotate during the rotation process. The driven gear 35 drives the outer tube 36 and the electric heating plate 38 to rotate. At the same time, the conductive rod 37 is energized to heat the electric heating plate 38.

[0035] Further improvement, such as Figure 4As shown, the inner ends of several groups of electric heating plates 38 are in contact with the conductive rods 37 and are distributed in a spiral shape. The electric heating plates 38 are energized for heating and perform hot-melt stirring treatment on the repairing materials during the rotation process.

[0036] Specifically, the repair pipe 22 includes an arc-shaped outer shell 39, an arc-shaped inner tube 40, a branch pipe 41, a nozzle 42 and a valve body 43. The arc-shaped outer shell 39 is fixed on the inner wall of the guide groove 2, the arc-shaped inner tube 40 is built in the arc-shaped outer shell 39, the branch pipes 41 are divided into several groups and are evenly installed on the arc-shaped inner tube 40, the nozzle 42 is installed at the end of the branch pipe 41, and the valve body 43 is installed on the branch pipe 41. The melted repair material is guided through the arc-shaped inner tube 40 and drained to the nozzle 42 through the branch pipe 41, and the nozzle 42 repairs the damaged cable insulation layer.

[0037] During use: When it is necessary to maintain the high-altitude cable, the staff climbs to a high altitude and engages the two sets of half-cylinder shells 1 on the high-altitude cable, so that the plug-in rod 4 is inserted into the plug-in interface 3 and the two sets of half-cylinder shells 1 are locked by the limit bolt 6. After the installation is completed, the staff pulls the slide bar 24 to move laterally. When the slide bar 24 moves laterally along the slide groove 27, the slide bar 24 can be moved inward synchronously so that the roller 12 can contact the cable. At this time, the battery 8 is turned on to power the device, and the driving motor 13 drives the roller 12 to rotate. The roller 12 moves laterally along the cable during the rotation process. During the movement, the camera 16 is used to visualize the surface of the cable. Identification, when it is found that the surface of the cable is damaged, a signal can be transmitted to the controller 17, and the controller 17 controls the adjustable driver to continue to move forward a distance so that the repair tube 22 of the repair mechanism is located opposite the damaged part. At this time, the adjustable driver stops operating and the motor 33 drives the driving gear 34 to rotate. The driving gear 34 drives the driven gear 35 to rotate during the rotation process. The driven gear 35 drives the outer tube 36 and the electric heating plate 38 to rotate. At the same time, the conductive rod 37 is energized to heat the electric heating plate 38, and the melted repair material is guided through the arc inner tube 40 and drained to the nozzle 42 through the branch pipe 41. The nozzle 42 repairs the damaged cable insulation layer.

[0038] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0040] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power supply cable maintenance device, characterized in that: The invention comprises a split cable outer frame, an adjustable driver, a visual detection component and a repair mechanism. The split cable outer frame comprises two groups of symmetrically arranged half-cylinder shells (1) and a splicing component arranged between the two groups of half-cylinder shells (1). A guide groove (2) is formed between the two groups of half-cylinder shells (1). The splicing component comprises four groups of plug interfaces (3) opened at the end of one group of half-cylinder shells (1) and four groups of plug rods (4) installed at the end of the other group of half-cylinder shells (1). The plug rods (4) are correspondingly inserted into the plug interfaces (3). The outer ends of the plug rods (4) are provided with limiting openings (5). The limiting opening (5) is internally threaded with a limiting bolt (6), the limiting bolt (6) is inserted into the semi-cylinder shell (1), the surface of the semi-cylinder shell (1) is provided with an adjustment groove (7), the adjustable driver is divided into two groups and is respectively inserted into the two groups of adjustment grooves (7), the visual detection components are divided into two groups and are respectively installed in the two groups of semi-cylinder shells (1), the repair mechanism is divided into two groups and is located on the inner side of the visual detection component, and a battery (8) is also installed in the semi-cylinder shell (1), and the battery (8) is used to supply power for the operation of the adjustable driver, the visual detection component and the repair mechanism; The adjustable driver comprises a positioning adjuster (9), a snap ring (10), a mounting frame (11), a roller (12) and a driving motor (13); the positioning adjuster (9) is inserted into the adjusting groove (7) and the inner end is connected to the snap ring (10); the mounting frame (11) is fixed in the snap ring (10); the roller (12) is rotatably mounted on the mounting frame (11); the driving motor (13) is fixed to one side of the mounting frame (11) and the power output end is connected to the roller (12); and the roller (12) is in contact with a power supply cable; The visual detection component comprises a semi-ring (14), a fill light bar (15) and a camera (16); the semi-ring (14) is mounted at the end of the guide groove (2); the fill light bar (15) is divided into two groups and symmetrically mounted on both sides of the semi-ring (14); the camera (16) is divided into a plurality of groups and evenly distributed on the semi-ring (14); the camera (16) is connected to a controller (17) via a line; and the controller (17) is connected to an adjustable driver and a repair mechanism via a line; The repair mechanism comprises a material storage container (18), a stirring hot melter (19), a material guide pipe (20), a valve (21) and a repair pipe (22); the material storage container (18) is located directly above the semi-cylinder shell (1) and the lower end is connected to the repair pipe (22) through the material guide pipe (20); the repair pipe (22) is built into the guide groove (2); the stirring hot melter (19) is installed in the material storage container (18); and the valve (21) is installed on the material guide pipe (20).

2. A power supply cable maintenance device according to claim 1, characterized in that: The positioning adjuster (9) comprises a guide block (23), a slide rod (24), a ball (25) and a limit nut (26). The guide blocks (23) are divided into two groups and are symmetrically installed on the inner wall of the adjustment groove (7). A slide groove (27) is formed between the two groups of guide blocks (23). The slide rod (24) is inserted into the slide groove (27) and passes through the ball (25). The ball (25) contacts the inner wall of the guide block (23). The limit nut (26) is threadedly arranged on the outer end of the slide rod (24) and contacts the semi-cylinder shell (1).

3. A power supply cable maintenance device according to claim 2, characterized in that: The outer side of the guide block (23) is machined into a plane structure and the inner side is machined into an inclined structure. The thickness of one end of the guide block (23) is smaller than the thickness of the other end.

4. A power supply cable maintenance device according to claim 1, characterized in that: The roller (12) comprises a wheel body (28) and a rubber jacket (29) wrapped around the wheel body (28); a plurality of groups of anti-skid bumps (30) are formed on the surface of the rubber jacket (29); and the anti-skid bumps (30) are in contact with the power supply cable.

5. A power supply cable maintenance device according to claim 1, characterized in that: The material storage container (18) comprises a container body (31) and a cover (32) arranged on the top of the container body (31); the interior of the container body (31) is filled with repair material and the bottom is connected to the repair pipe (22) through a pipeline.

6. A power supply cable maintenance device according to claim 1, characterized in that: The stirring hot melter (19) comprises a motor (33), a driving gear (34), a driven gear (35), an outer tube (36), a conductive rod (37) and an electric heating plate (38); the motor (33) is installed on the inner side of the cover (32) and the power output end is connected to the driving gear (34); the driving gear (34) is meshed with the driven gear (35); the outer tube (36) is fixed on the driven gear (35); the conductive rod (37) is built into the outer tube (36) and connected to an external circuit; the electric heating plate (38) is divided into a plurality of groups and is evenly installed on the outer tube (36).

7. A power supply cable maintenance device according to claim 6, characterized in that: The inner ends of the plurality of groups of electric heating plates (38) are in contact with the conductive rods (37) and are distributed in a spiral shape.

8. A power supply cable maintenance device according to claim 5, characterized in that: The repair pipe (22) comprises an arc-shaped outer shell (39), an arc-shaped inner tube (40), a branch pipe (41), a nozzle (42) and a valve body (43); the arc-shaped outer shell (39) is fixed on the inner wall of the guide groove (2); the arc-shaped inner tube (40) is built in the arc-shaped outer shell (39); the branch pipes (41) are divided into a plurality of groups and are evenly installed on the arc-shaped inner tube (40); the nozzle (42) is installed on the end of the branch pipe (41); and the valve body (43) is installed on the branch pipe (41).

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