Regional emergency power supply compartment

Abstract

The utility model discloses a regional emergency power supply carriage, which belongs to the field of emergency power supply carriages and is provided with a carriage with a separating frame, the separating frame can play a role in reinforcing the carriage and hanging articles when being arranged in the carriage, and a supporting plate can be unfolded for placing and supporting when being separated. According to the utility model, a plurality of separating frames are arranged at different positions, wiring supporting can be carried out, wiring tapping can be carried out through the arranged junction box, power supply lines and joints cannot be arranged on the ground, regional wiring and wiring can be conveniently carried out through the combination of the separating frames at different positions, and meanwhile, the wiring efficiency is improved. The combined rod and the wire coiling rod arranged on the separating frame can coil and stretch wiring, stability of overhead line erecting is better guaranteed, safety of power supply is guaranteed, wire arranging annular grooves are further formed in the combined rod and the wire coiling rod, messy wire coiling is prevented, weight adjustment of the combined rod is facilitated through an inner groove and a sealing cover arranged on the combined rod, and the wire coiling efficiency is improved. Damage to wires is reduced while tensioning is guaranteed, and the equipment can be used for regional emergency lighting due to the lighting design of the separation frame.

Description

Technical Field

[0001] The utility model belongs to the field of emergency power supply carriages, in particular to a regional emergency power supply carriage. Background Art

[0002] Special vehicles refer to vehicles that exceed the design vehicle limits in terms of external dimensions and weight and are used for special purposes. They are specially made or specially modified, equipped with fixed devices and equipment, and their main function is not to carry people or goods. Among them, emergency power supply vehicles are a type of special vehicles. Emergency power supply vehicles: special vehicles equipped with power supply devices, which can be equipped with battery packs, diesel generator sets, gas generator sets, etc., can realize functions such as power generation, equipment maintenance, conference support, and field operations. The special compartment of the emergency power supply vehicle is the emergency power supply compartment. With the rapid development of science and technology, it has also been improved technically, but the existing technology is in use. When the power supply needs to be connected from the carriage, when regional power supply is carried out, if there is no pole on site for wiring, a large number of power supply lines will be laid on the ground. When the power supply line is not long enough or the power supply area needs to branch the line, the connector is placed directly on the ground, and the line is prone to bumping, crushing, water ingress, etc., resulting in low power supply safety. At the same time, when the line of some power supply points is too long after branching, the line is simply coiled and placed on one side, which easily causes the line to be tangled, which is inconvenient. Moreover, when the existing technology is used, power supply can only be connected to the power supply point that needs power supply, with a single function and high usage limitations. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In order to overcome the shortcomings of the existing technology, a regional emergency power supply carriage is proposed to solve the problem that when the existing technology is used, since the power supply needs to be connected to the carriage, when the regional power supply is carried out, if there is no pole body for wiring on site, a large number of power supply lines will be laid on the ground. When the power supply line is not long enough or the power supply area needs to tap the line, the joint is also placed directly on the ground, and the line is prone to bumping, rolling, water ingress, etc., resulting in low power supply safety. At the same time, when the line of some power supply points is too long after tapping, the line is simply coiled and placed on one side, which is easy to cause the line to be messy and tangled, which is inconvenient.

[0005] Secondly, it solves the problem that the existing technology can only supply power by wiring to the power supply point where power is needed, has a single function and is highly limited in use.

[0006] (II) Technical solution

[0007] The utility model is realized by the following technical scheme: the utility model proposes a regional emergency power supply carriage, the structure of which includes a carriage body, wherein a box slot is provided in the carriage body;

[0008] Inside the car body, there are also limit slots, which are arranged at two sides perpendicular to the front of the car body at the bottom of the box slot and communicate with the box slot. A separation rack is assembled in the box slot. The separation rack is in a U-shaped with the opening facing downwards. The side of the separation rack is attached to the car body, and the bottom of the separation rack is assembled in the limit slot;

[0009] The separation rack is composed of a support plate, a rack body, a junction box, a first combined rod, a combined rod slot, a wiring hole, a wire coiling rod, a second combined rod, a baffle, and a baffle slot. The rack body is in a U-shaped with the opening facing downwards. Combined rod slots are provided on the opposite sides of the side rods of the rack body. The first combined rod and the second combined rod are respectively received in the combined rod slots on the two side rods of the rack body. The first combined rod and the second combined rod can be combined into a rod body. Baffle slots are also provided on the opposite sides of the side rods of the rack body. The baffle is arranged in the baffle slot and one end is hinged to the rack body. The baffle is used for limiting when the first combined rod and the second combined rod are received. Junction boxes are inlaid and assembled on the mutually remote sides of the side rods of the rack body. The wiring hole is arranged in the rack body and is used to connect the junction boxes on the two side rods of the rack body. Support plates are inlaid and hinged to the bottom of the side rods of the rack body except for the opposite sides. The wire coiling rod is inlaid and assembled on the upper side between the side rods of the rack body.

[0010] Further, the length of the rod body formed by combining the first combined rod and the second combined rod is less than the maximum distance between the combined rod slots on the two sides of the rack body, and the length of the rod body formed by combining the first combined rod and the second combined rod is greater than the minimum distance between the combined rod slots on the two sides of the rack body.

[0011] Further, the hinge position between the support plate and the rack body is at the bottom of the rack body. The bottom of the support plate is flush with the bottom of the rack body after being perpendicular to the rack body and unfolded. A rubber ring is also coated on the shaft rod where the support plate is hinged to the rack body.

[0012] Further, the side of the baffle away from the rack body is flush with the side of the rack body.

[0013] Further, the first combined rod, the wire coiling rod, and the second combined rod are all rod bodies with a circular cross-section, and wire arranging ring grooves are provided on the first combined rod, the wire coiling rod, and the second combined rod.

[0014] Further, a lighting lamp is hinged to the bottom of the top rod of the rack body. A rubber ring is also coated on the shaft rod where the lighting lamp is hinged to the rack body. The lighting lamp is electrically connected to the junction box.

[0015] Further, a lighting lamp switch is provided on the junction box.

[0016] Furthermore, the first combination rod is composed of a docking ring, a handle groove, a cover, a combination rod body, an inner groove, a limit ring and a first pair of joints. The combination rod body is cocentrically provided with an inner groove, one end of the inner groove penetrates one end of the combination rod body, the combination rod body is inlaid and locked with a cover at the end penetrated by the inner groove, the cover is used to block the inner groove penetrating the combination rod body, the cover is provided with a handle groove at the end away from the inner groove, the combination rod body is fixed with a first pair of joints at the end away from the cover, the first docking head is sleeved with a docking ring, the first pair of joints are covered and fixed with a limit ring on the side away from the combination rod body, the limit ring is used to limit the docking ring, and the docking ring is used for combined docking of the first combination rod and the second combination rod.

[0017] Furthermore, the second combination rod is composed of the same handle groove, cover, combination rod body and inner groove as the first combination rod, and a second pair of joints different from the first combination rod. The combination rod body of the second combination rod is fixed with a second pair of joints on the side away from the cover. The second pair of joints are externally threaded screws, and the docking ring is an internally threaded ring. The docking ring can be covered on the second docking head and threadedly connected to the second pair of joints.

[0018] (III) Beneficial effects

[0019] One of the above technical solutions has the following advantages or beneficial effects:

[0020] 1) To solve the problem that when the prior art is used, since the power supply needs to be connected to the carriage, when regional power supply is carried out, if there is no pole body for wiring on site, a large number of power supply lines will be laid on the ground. When the power supply line is not long enough or the power supply area needs to tap the line, the joint is also placed directly on the ground, and the line is prone to bumping, rolling, water ingress, etc., resulting in low power supply safety. At the same time, when the line of some power supply points is too long after tapping, the line is simply coiled and placed on one side, which is easy to cause the line to be messy and tangled, which is inconvenient. A carriage with a separation frame is provided. The separation frame can play a role in strengthening the carriage and hanging objects and cables when it is in the carriage. When separated, the separation frame is separated After separation, the support plate can be unfolded for placement and support, and the wiring can be supported and the wiring can be branched through the junction box, so that the power supply lines and connectors will not be laid on the ground, and multiple separation racks at different positions can be combined to facilitate regional wiring. At the same time, the combination rods and winding rods on the separation racks can also be used for winding and tensioning of wiring, so as to better ensure the stability of the aerial lines, thereby better ensuring the safety of power supply. The combination rods and winding rods are also provided with wire management ring grooves, so that the excess wires can be coiled on the combination rods and winding rods in an orderly manner. The inner grooves and covers of the combination rods are convenient for adding different materials inside to adjust the weight of the combination rods, ensuring tensioning while reducing damage to the wires.

[0021] 2) In order to solve the problem that the power supply of the prior art can only be achieved by wiring to the power supply point where power is required, the function is single and the use is highly limited, a lighting lamp is also provided on the separation frame, so that when the equipment is laying the line through the separation frame, the line can be switched through the junction box of the separation frame, and the lighting lamp can be turned on for lighting through the switch on the junction box, so that the equipment can not only perform the functions of aerial wiring and tensioning coils, but also be used for regional emergency lighting with the layout of the separation frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0023] Figure 1 This is a structural schematic diagram of a regional emergency power supply compartment of the utility model;

[0024] Figure 2 It is a cross-sectional structural diagram of the front view of the separation rack combined rods of the utility model when they are stored;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model when the separation rack combination rods are stored;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the front view of the combined rods of the separation rack of the utility model when they are combined;

[0027] Figure 5 For this utility model Figure 4 A is a schematic diagram of the enlarged structure of the middle part;

[0028] Figure 6 For this utility model Figure 4 Schematic diagram of the enlarged structure of B;

[0029] Figure 7 It is a schematic diagram of the cross-sectional structure of the utility model when the separation frame assembly rods are assembled;

[0030] In the figure: carriage body -1, box slot -2, limit slot -3, separation frame -4, support plate -4a, frame body -4b, junction box -4c, first combination rod -4d, combination rod slot -4e, wiring hole -4f, winding rod -4g, second combination rod -4h, baffle -4i, baffle slot -4j, wire management ring slot -4k, lighting -4l, docking ring -4d1, handle slot -4d2, cover -4d3, combination rod body -4d4, inner slot -4d5, limit ring -4d6, first pair of joints -4d7, second pair of joints -4h1. DETAILED DESCRIPTION

[0031] The present utility model will be further described in detail below in conjunction with embodiments, but the implementation manners of the present utility model are not limited thereto.

[0032] The present utility model provides a regional emergency power supply carriage, the structure of which includes a carriage main body 1, and a box groove 2 is arranged inside the carriage main body 1;

[0033] A limiting groove 3 is further arranged inside the carriage main body 1, and the limiting groove 3 is arranged at two side edges perpendicular to the vehicle head at the bottom of the box groove 2 and is communicated with the box groove 2. A separation rack 4 is assembled inside the box groove 2. The separation rack 4 is in a U-shaped with an opening facing downwards. The side edges of the separation rack 4 are attached to the carriage main body 1, and the bottom of the separation rack 4 is assembled inside the limiting groove 3;

[0034] The separation rack 4 is composed of a support plate 4a, a rack body 4b, a junction box 4c, a first combined rod 4d, a combined rod groove 4e, a wiring hole 4f, a wire coiling rod 4g, a second combined rod 4h, a baffle 4i and a baffle groove 4j. The rack body 4b is in a U-shaped with an opening facing downwards. Combined rod grooves 4e are arranged on the opposite sides of the side rods of the rack body 4b. The first combined rod 4d and the second combined rod 4h are respectively received inside the combined rod grooves 4e on the two side rods of the rack body 4b. The first combined rod 4d and the second combined rod 4h can be combined into a rod body. Baffle grooves 4j are also arranged on the opposite sides of the side rods of the rack body 4b. The baffle 4i is arranged inside the baffle groove 4j and one end thereof is hinged to the rack body 4b. The baffle 4i is used for limiting when the first combined rod 4d and the second combined rod 4h are received. Junction boxes 4c are respectively and inlaid and assembled on the mutually remote sides of the side rods of the rack body 4b. The wiring hole 4f is arranged inside the rack body 4b. The wiring hole 4f is used for communicating the junction boxes 4c on the two side rods of the rack body 4b. Support plates 4a are respectively and inlaid and hinged at the bottoms of the side rods of the rack body 4b except for the opposite sides. The wire coiling rod 4g is inlaid and assembled above the side rods of the rack body 4b.

[0035] Wherein, the length of the rod body formed by combining the first combined rod 4d and the second combined rod 4h is less than the maximum distance between the combined rod grooves 4e on the two sides of the rack body 4b, and the length of the rod body formed by combining the first combined rod 4d and the second combined rod 4h is greater than the minimum distance between the combined rod grooves 4e on the two sides of the rack body 4b.

[0036] Wherein, the hinge position between the support plate 4a and the rack body 4b is at the bottom of the rack body 4b. The bottom of the support plate 4a is flush with the bottom of the rack body 4b after being unfolded perpendicular to the rack body 4b. A rubber ring is also coated on the shaft rod where the support plate 4a is hinged to the rack body 4b.

[0037] Wherein, the side of the baffle 4i away from the rack body 4b is flush with the side edge of the rack body 4b.

[0038] The first combination rod 4d, the cable winding rod 4g and the second combination rod 4h are rod bodies with circular cross sections, and the first combination rod 4d, the cable winding rod 4g and the second combination rod 4h are all provided with a cable management ring groove 4k.

[0039] The bottom of the top rod of the frame 4b is hinged with a lighting lamp 41, and the shaft of the lighting lamp 41 hinged with the frame 4b is also covered with a rubber ring. The lighting lamp 41 is electrically connected to the junction box 4c.

[0040] Wherein, the junction box 4c is provided with a lighting lamp 41 switch.

[0041] The first combination rod 4d is composed of a docking ring 4d1, a handle groove 4d2, a cover 4d3, a combination rod body 4d4, an inner groove 4d5, a limit ring 4d6 and a first joint 4d7. The combination rod body 4d4 is provided with an inner groove 4d5 cocentrically. One end of the inner groove 4d5 penetrates one end of the combination rod body 4d4. The combination rod body 4d4 is embedded and locked with a cover 4d3 at the end penetrated by the inner groove 4d5. The cover 4d3 is used to block the inner groove 4d5 from penetrating the combination rod body 4d4. At d4, a handle groove 4d2 is provided at the end of the cover 4d3 away from the inner groove 4d5, and a first pair of joints 4d7 is fixed to the end of the combination rod body 4d4 away from the cover 4d3, and a docking ring 4d1 is sleeved on the first pair of joints 4d7. A limiting ring 4d6 is fixed to the side of the first pair of joints 4d7 away from the combination rod body 4d4, and the limiting ring 4d6 is used for limiting the docking ring 4d1, and the docking ring 4d1 is used for combined docking of the first combination rod 4d and the second combination rod 4h.

[0042] Among them, the second combination rod 4h is composed of the handle groove 4d2, the cover 4d3, the combination rod body 4d4 and the inner groove 4d5 which are the same as the first combination rod 4d, and the second pair of joints 4h1 which is different from the first combination rod 4d. The combination rod body 4d4 of the second combination rod 4h is fixed with the second pair of joints 4h1 on the side away from the cover 4d3. The second pair of joints 4h1 is an externally threaded screw, and the docking ring 4d1 is an internally threaded ring. The docking ring 4d1 can be covered on the second pair of joints 4h1 and threadedly connected with the second pair of joints 4h1.

[0043] Implementation plan: During the use of the equipment, when the carriage is in normal use, the separation frame 4 can enhance the stability of the carriage body 1, and the limit groove 3 can ensure that the separation frame 4 will not move arbitrarily in the box groove 2. When the power supply and wiring are used, the separation frame 4 can be separated. After the separation frame 4 is separated from the carriage body 1, the support plates 4a of the two side rods can be unfolded at a fixed position. After the support plates 4a are unfolded, they can be pressed by heavy objects to facilitate the stable placement of the frame 4b. Then, when wiring, if only the separation frame 4 is used for auxiliary support of aerial wiring, the cable can be directly passed through the winding rod 4g for laying. In order to ensure the tension of the wire, the baffle 4i can be rotated first, and then the first combination rod 4d and the second combination rod 4h are taken out from the combination rod groove 4e, and the ends of the first combination rod 4d and the second combination rod 4h provided with the cover 4d3 are placed in the combination rod groove 4e. After the rods are put into the combined rod groove 4e, the ends of the first combined rod 4d and the second combined rod 4h provided with the docking ring 4d1 and the second docking joint 4h1 are combined. The first combined rod 4d and the second combined rod 4h after being combined can slide up and down in the combined rod groove 4e, so that the laid cables can be wrapped around the combined rod and the coiling rod 4g for a circle before continuing to be laid, so that the combined rod can tighten the laid cables by its own weight. At this time, if the dead weight is not enough, the cover 4d3 of the first combined rod 4d and the second combined rod 4h can be unscrewed before the combined rods are combined, and different materials can be added into the inner groove 4d5 to adjust the weight, so as to ensure the appropriate tensioning dead weight, reduce the damage to the line, and realize the aerial laying and routing of the power line of the equipment, which can avoid the bumping, rolling, water ingress and other situations that are easy to occur when the line is laid on the ground, and ensure the safety of power supply;

[0044] At the same time, junction boxes 4c are also provided on both sides of the frame 4b of the separation frame 4 of the equipment, so that the equipment can connect the laid lines to the junction box 4c, and then branch them through the junction box 4c, avoiding the inconvenience of laying the joints on the ground, and also enabling the separation frame 4 to perform better regional wiring combinations. The separation frame 4 can be laid out at different positions for regional wiring and power supply, which is more convenient for power supply. After the lighting lamp 4l on the separation frame 4 is connected to the junction box 4c, it can be controlled and used by the switch on the junction box 4c (not shown in the figure), so that the equipment can also be used for regional emergency lighting according to the regional layout of the separation frame 4, with diversified functions and high practicality.

[0045] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0047] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A regional emergency power supply carriage, whose structure includes a carriage body (1), and a box groove (2) is arranged inside the carriage body (1); Features: A limiting groove (3) is further arranged inside the carriage body (1), and the limiting groove (3) is arranged at two side edges perpendicular to the vehicle head at the bottom of the box groove (2) and communicates with the box groove (2). A separating frame (4) is assembled inside the box groove (2). The separating frame (4) is in a U-shaped with an opening downward. The side edges of the separating frame (4) are attached to the carriage body (1), and the bottom of the separating frame (4) is assembled inside the limiting groove (3); The separating frame (4) is composed of a support plate (4a), a frame body (4b), a junction box (4c), a first combined rod (4d), a combined rod groove (4e), a wiring hole (4f), a wire coiling rod (4g), a second combined rod (4h), a baffle (4i), and a baffle groove (4j). The frame body (4b) is in a U-shaped with an opening downward. Combined rod grooves (4e) are arranged on the opposite sides of the side rods of the frame body (4b). The first combined rod (4d) and the second combined rod (4h) are respectively received in the combined rod grooves (4e) on the two side rods of the frame body (4b). The first combined rod (4d) and the second combined rod (4h) can be combined into a rod body. Baffle grooves (4j) are also arranged on the opposite sides of the side rods of the frame body (4b). The baffle (4i) is arranged inside the baffle groove (4j) and one end of the baffle (4i) is hinged to the frame body (4b). The baffle (4i) is used for limiting when the first combined rod (4d) and the second combined rod (4h) are received. Junction boxes (4c) are inlaid and assembled on the mutually remote sides of the side rods of the frame body (4b). The wiring hole (4f) is arranged inside the frame body (4b), and the wiring hole (4f) is used for communicating the junction boxes (4c) on the two side rods of the frame body (4b). Support plates (4a) are inlaid and hinged to the side rods of the frame body (4b) except at the opposite sides of the bottom. The wire coiling rod (4g) is inlaid and assembled on the upper side between the side rods of the frame body (4b).

2. A regional emergency power supply carriage according to claim 1, characterized in that: The length of the rod body formed by combining the first combined rod (4d) and the second combined rod (4h) is less than the maximum distance between the combined rod grooves (4e) on the two sides of the frame body (4b), and the length of the rod body formed by combining the first combined rod (4d) and the second combined rod (4h) is greater than the minimum distance between the combined rod grooves (4e) on the two sides of the frame body (4b).

3. A regional emergency power supply carriage according to claim 1, characterized in that: The hinge position between the support plate (4a) and the frame body (4b) is at the bottom of the frame body (4b). When the support plate (4a) is perpendicular to the frame body (4b) and unfolded, the bottom of the support plate (4a) is flush with the bottom of the frame body (4b). A rubber ring is also coated on the shaft rod where the support plate (4a) is hinged to the frame body (4b).

4. A regional emergency power supply carriage according to claim 1, characterized in that: The side of the baffle (4i) away from the frame body (4b) is flush with the side edge of the frame body (4b).

5. The regional emergency power supply carriage according to claim 1, characterized in that: The first combined rod (4d), the wire coiling rod (4g), and the second combined rod (4h) are all rod bodies with a circular cross-section. Wire management ring grooves (4k) are arranged on the first combined rod (4d), the wire coiling rod (4g), and the second combined rod (4h).

6. A regional emergency power supply carriage according to claim 1, characterized in that: A lighting lamp (41) is hingedly connected to the bottom of the top rod of the frame (4b); a rubber ring is also coated on the shaft of the lighting lamp (41) and the frame (4b) being hingedly connected; and the lighting lamp (41) is electrically connected to the junction box (4c).

7. A regional emergency power supply carriage according to claim 6, characterized in that: The junction box (4c) is provided with a lighting lamp (41) switch.

8. The regional emergency power supply carriage according to claim 1, characterized in that: The first combination rod (4d) is composed of a docking ring (4d1), a handle groove (4d2), a cover (4d3), a combination rod body (4d4), an inner groove (4d5), a limit ring (4d6) and a first pair of joints (4d7); the combination rod body (4d4) is provided with an inner groove (4d5) cocentrically inside; one end of the inner groove (4d5) penetrates one end of the combination rod body (4d4); the combination rod body (4d4) is embedded and locked with a cover (4d3) at the end penetrated by the inner groove (4d5); the cover (4d3) is used to block the inner groove (4d5) from penetrating the combination rod body (4d4); d4), the end of the cover (4d3) away from the inner groove (4d5) is provided with a handle groove (4d2), the end of the combination rod body (4d4) away from the cover (4d3) is fixed with a first pair of joints (4d7), a docking ring (4d1) is sleeved on the first pair of joints (4d7), and a limiting ring (4d6) is fixedly wrapped on the side of the first pair of joints (4d7) away from the combination rod body (4d4), the limiting ring (4d6) is used for limiting the position of the docking ring (4d1), and the docking ring (4d1) is used for combined docking of the first combination rod (4d) and the second combination rod (4h).

9. A regional emergency power supply carriage according to claim 8, characterized in that: The second combination rod (4h) is composed of a handle groove (4d2), a cover (4d3), a combination rod body (4d4) and an inner groove (4d5) which are the same as those of the first combination rod (4d), and a second pair of joints (4h1) which is different from that of the first combination rod (4d); a second pair of joints (4h1) is fixed to the combination rod body (4d4) of the second combination rod (4h) on the side away from the cover (4d3); the second pair of joints (4h1) is an externally threaded screw; the docking ring (4d1) is an internally threaded ring; the docking ring (4d1) can be covered on the second pair of joints (4h1) and threadedly connected to the second pair of joints (4h1).

Images