Cold contraction intermediate joint with enhanced mechanical protection

Abstract

The utility model discloses a cold shrink intermediate joint with enhanced mechanical protection, which relates to the field of cold shrink intermediate joints, and comprises a cold shrink intermediate joint and a first shell, and the top of the first shell is respectively provided with a through hole and a movable assembly. By arranging the movable assembly, when one worker injects glue into the first shell and the second shell through the through holes, the other worker can pull the pull rod in a reciprocating mode, the pull rod can drive the two pistons in the sleeve to move in a reciprocating mode, and when the pistons move rightwards, the second one-way valve located on the second air pipe on the right side is closed at the moment; when the piston moves rightwards, the first one-way valve on the first air pipe on the right side is opened, air is exhausted through the first air pipe, the second one-way valve on the second air pipe on the left side is opened, the first one-way valve on the first air pipe on the left side is closed, and air on the left side of the first shell can be sucked into the sleeve due to the fact that the piston moves rightwards; at the moment, the glue flows towards the left side of the first shell, and the flowing efficiency of the glue is improved.

Description

Technical Field

[0001] The utility model relates to the field of cold shrinkage middle joints, in particular to a cold shrinkage middle joint with enhanced mechanical protection. Background Art

[0002] The cable is made of one or more mutually insulated conductors and an outer insulating protective layer. It is a wire that transmits electricity or information from one place to another. It is usually a rope-like cable formed by twisting several or several groups of wires (at least two in each group). Each group of wires is insulated from each other and are often twisted around a center. The entire outside is covered with a highly insulating covering. The cable has the characteristics of internal electrification and external insulation. The common method on the market is to install the cold shrink intermediate joint on the cable according to the requirements of the installation instructions, and then wrap the waterproof tape and armor tape around the outside before use.

[0003] According to a Chinese patent with publication number CN209088510U, a 10kV cold shrink intermediate joint with enhanced mechanical protection is disclosed. The 10kV cold shrink intermediate joint with enhanced mechanical protection has a mesh structure box body that can absorb energy and buffer when the cable explodes. The box body, which is formed with flame-retardant polyester resin as the matrix and glass fiber as the reinforcing material, has good rigidity and plays a role in strengthening mechanical protection. The waterproof glue is poured with a greenhouse curing agent. Therefore, the overall structure has the functions of flame retardancy, waterproofness, explosion-proofness and enhanced mechanical protection. There is no need to make a cable trench or a cable protection tube for protection, and it can be immersed in water for a long time.

[0004] With respect to the above-disclosed patent content, a glue injection hole is provided on the shell so that glue can be injected into the shell through the glue injection hole to fill the gap between the shell and the cold shrink intermediate joint, thereby achieving sealing. However, after the glue flows into the shell during glue injection, due to the poor fluidity of the glue, it is difficult for the glue to quickly flow around the inside of the shell and quickly fill the gap between the shell and the cold shrink intermediate joint, thereby reducing the filling effect of the glue. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a cold shrink intermediate joint with enhanced mechanical protection to solve the technical problem that the gap between the shell and the cold shrink intermediate joint is difficult to fill quickly due to the poor fluidity of the glue.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cold shrink intermediate joint with enhanced mechanical protection, comprising a cold shrink intermediate joint and a first shell, the top of the first shell is respectively provided with a through hole and a movable component, and the movable component comprises a second air pipe installed on both sides of the top of the first shell, a sleeve is installed between the two second air pipes, and two pistons are arranged inside the sleeve, a pull rod extending to the outside of the sleeve is installed on one side of one of the pistons, first air pipes are installed on both sides of the top of the sleeve, and a first one-way valve is installed on the first air pipe, and a second one-way valve is installed on the second air pipe.

[0007] By adopting the above technical solution, when one worker injects glue into the first shell and the second shell through the through hole, another worker can pull the pull rod back and forth, and the pull rod will cause the two pistons inside the sleeve to move back and forth.

[0008] Furthermore, a sealing ring is provided between the sleeve and the pull rod, and a pull plate is installed at one end of the pull rod.

[0009] By adopting the above technical solution, the provision of the sealing ring can improve the sealing between the pull rod and the sleeve, and prevent the air inside the sleeve from being discharged through the gap between the pull rod and the sleeve.

[0010] Furthermore, a connecting rod is installed between the two pistons, and the outer wall of the piston is tightly fitted with the inner wall of the sleeve.

[0011] By adopting the above technical solution, when one piston moves, it will drive the connecting rod to move, and drive the other piston to move through the connecting rod.

[0012] Furthermore, the first shell is connected to the second shell via a pin shaft, and the shrinkage intermediate joint is located inside the cylinder formed by the first shell and the second shell.

[0013] By adopting the above technical solution, the arrangement of the pin shaft facilitates the rotation of the second shell, thereby enabling the first shell and the second shell to be closed or opened.

[0014] Furthermore, the second shell and the first shell are both provided with connecting plates, and locking bolts are installed between the two connecting plates.

[0015] By adopting the above technical solution, when the second shell and the first shell are closed, the two connecting plates will fit together, and at this time, the locking bolts are screwed into the inside of the connecting plates to fix the second shell and the first shell.

[0016] Furthermore, a sealing groove is provided in the first shell, and a sealing strip extending to the inside of the sealing groove is installed on the second shell.

[0017] By adopting the above technical solution, when the second shell and the first shell are closed, it will drive the sealing strip to rotate into the sealing groove, thereby improving the sealing performance of the closed portion of the second shell and the first shell.

[0018] Furthermore, the outer walls of the first shell and the second shell are both provided with a first annular groove, the ends of the first shell and the second shell are both sleeved with a plastic ring, and the inner wall of the plastic ring is provided with an iron ring.

[0019] By adopting the above technical solution, the plastic ring can be sleeved on the ends of the first shell and the second shell, and the iron ring can be inserted into the first annular groove.

[0020] Furthermore, a second annular groove is provided on the outer wall of the plastic ring, and a clamp is clamped in the second annular groove.

[0021] By adopting the above technical solution, the clamp can be conveniently clamped inside the second annular groove, thereby fixing the plastic ring.

[0022] Furthermore, a rubber ring is provided on the inner wall of the plastic ring, and the iron ring is located inside the first annular groove.

[0023] By adopting the above technical solution, the provision of the rubber ring can improve the sealing between the cable and the first shell and the second shell.

[0024] Furthermore, cables are inserted into the interior of the first shell and the second shell, and the interior of the first shell and the second shell is filled with greenhouse-cured waterproof glue.

[0025] By adopting the above technical solution, after the greenhouse-cured waterproof glue enters the first shell and the second shell, the gap between the cold shrinkage intermediate joint and the first shell and the second shell can be filled to play a waterproof role.

[0026] In summary, the utility model mainly has the following beneficial effects:

[0027] The utility model is provided with a movable component. When a worker injects glue into the first shell and the second shell through the through hole, another worker can pull the pull rod back and forth, and the pull rod will drive the two pistons inside the sleeve to move back and forth. When the piston moves to the right, the second one-way valve on the right second air pipe is closed, and the first one-way valve on the right first air pipe is opened, and the air is discharged through the first air pipe, while the second one-way valve on the left second air pipe is opened, and the first one-way valve on the left first air pipe is closed. As the piston moves to the right, the air on the left side of the first shell will be sucked into the sleeve, and the glue will flow to the left side of the first shell. Flow, and when the piston moves to the left, the second one-way valve on the right second air pipe opens, and the first one-way valve on the right first air pipe closes, and at the same time the second one-way valve on the left second air pipe closes, and the first one-way valve on the left first air pipe opens. At this time, the air inside the first shell will enter the sleeve through the right second air pipe, and the glue will flow to the right side of the first shell. This reciprocating process can make the injected glue flow quickly inside the first shell, thereby improving the flow efficiency of the glue, so that the glue can quickly fill the gap between the first shell and the second shell and the shrinkage intermediate joint, thereby improving the filling effect of the glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0029] Figure 2 It is a schematic diagram of the overall front section structure of the utility model;

[0030] Figure 3 This is a schematic diagram of the three-dimensional structure of the first shell of the utility model;

[0031] Figure 4 It is a schematic diagram of the side section structure of the first shell of the utility model;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the piston of the utility model.

[0033] In the figure: 1. shrinkage intermediate joint; 2. first shell; 3. cable; 4. first annular groove; 5. iron ring; 6. plastic ring; 7. rubber ring; 8. second annular groove; 9. movable component; 901. sleeve; 902. piston; 903. connecting rod; 904. pull rod; 905. sealing ring; 906. first air pipe; 907. first one-way valve; 908. second one-way valve; 909. second air pipe; 910. pull plate; 10. clamp; 11. second shell; 12. pin shaft; 13. through hole; 14. sealing strip; 15. sealing groove; 16. connecting plate; 17. locking bolt; 18. greenhouse curing waterproof glue. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0035] The following describes an embodiment of the utility model based on its overall structure.

[0036] Embodiment 1:

[0037] A cold shrink intermediate joint with enhanced mechanical protection, such as Figure 1-Figure 5 As shown, it includes a cold shrinkage intermediate joint 1 and a first shell 2, the top of the first shell 2 is respectively provided with a through hole 13 and a movable component 9, the first shell 2 is connected to the second shell 11 through a pin 12, the cold shrinkage intermediate joint 1 is located inside the cylinder composed of the first shell 2 and the second shell 11, the arrangement of the pin 12 facilitates the rotation of the second shell 11, and then the first shell 2 and the second shell 11 can be closed or opened, the second shell 11 and the first shell 2 are both provided with a connecting plate 16, and a locking bolt 17 is installed between the two connecting plates 16, when the second shell 11 and the first shell 2 are closed, the two connecting plates 16 will The locking bolts 17 are screwed into the connecting plate 16 to fix the second shell 11 and the first shell 2. The cables 3 are inserted into the first shell 2 and the second shell 11. The first shell 2 and the second shell 11 are filled with greenhouse curing waterproof glue 18. After the greenhouse curing waterproof glue 18 enters the first shell 2 and the second shell 11, it can fill the gap between the cold shrinkage intermediate joint 1 and the first shell 2 and the second shell 11 to play a waterproof role. The setting of the first shell 2 and the second shell 11 can play a role in strengthening mechanical protection, so as to protect the cold shrinkage intermediate joint 1.

[0038] Specifically, the movable component 9 includes second air pipes 909 installed on both sides of the top of the first shell 2, a sleeve 901 is installed between the two second air pipes 909, and two pistons 902 are arranged inside the sleeve 901, a pull rod 904 extending to the outside of the sleeve 901 is installed on one side of one piston 902, and a connecting rod 903 is installed between the two pistons 902. The outer wall of the piston 902 is tightly fitted with the inner wall of the sleeve 901. When one piston 902 moves, it will drive the connecting rod 903 to move, and drive the other piston 902 to move through the connecting rod 903.

[0039] Specifically, a first air pipe 906 is installed on both sides of the top of the sleeve 901, and a first one-way valve 907 is installed on the first air pipe 906, and a second one-way valve 908 is installed on the second air pipe 909. When a staff member injects glue into the first shell 2 and the second shell 11 through the through hole 13, another staff member can pull the pull rod 904 back and forth, and the pull rod 904 will move the two pistons 902 inside the sleeve 901 back and forth. A pull plate 910 is installed at one end of the pull rod 904, and a sealing ring 905 is provided between the sleeve 901 and the pull rod 904. The setting of the sealing ring 905 can improve the sealing between the pull rod 904 and the sleeve 901, and prevent the air inside the sleeve 901 from being discharged through the gap between the pull rod 904 and the sleeve 901.

[0040] See also Figure 5 A sealing groove 15 is provided in the first shell 2, and a sealing strip 14 extending to the inside of the sealing groove 15 is installed on the second shell 11. The sealing strip 14 is adapted to the sealing groove 15. When the second shell 11 and the first shell 2 are closed, the sealing strip 14 will be driven to rotate into the inside of the sealing groove 15, thereby improving the sealing performance of the closed portion of the second shell 11 and the first shell 2.

[0041] Embodiment 2:

[0042] On the basis of the above-mentioned first embodiment, in order to improve the sealing performance between the ends of the cable and the first shell 2 and the second shell 11, the following structure is provided.

[0043] See also Figure 1-Figure 3 The outer walls of the first shell 2 and the second shell 11 are both provided with a first annular groove 4, and the ends of the first shell 2 and the second shell 11 are both sleeved with a plastic ring 6, and the inner wall of the plastic ring 6 is provided with an iron ring 5, the plastic ring 6 can be sleeved on the ends of the first shell 2 and the second shell 11, and the iron ring 5 can be snapped into the first annular groove 4, the outer wall of the plastic ring 6 is provided with a second annular groove 8, and a clamp 10 is snapped into the second annular groove 8, which is convenient for the clamp 10 to be snapped into the second annular groove 8, and then the plastic ring 6 can be fixed, and the inner wall of the plastic ring 6 is also provided with a rubber ring 7, the inner wall of the rubber ring 7 is in contact with the outer wall of the cable 3, and the setting of the rubber ring 7 can improve the sealing between the cable 3 and the first shell 2 and the second shell 11, and the iron ring 5 is located inside the first annular groove 4.

[0044] The working principle of the utility model is as follows: first, the cable 3 is inserted into the cold shrink intermediate joint 1, and then the first shell 2 and the second shell 11 are wrapped around the outer wall of the cold shrink intermediate joint 1 through the pin shaft 12. At this time, the connecting plates 16 on the first shell 2 and the second shell 11 are aligned, and then the user screws the locking bolt 17 into the connecting plate 16 to limit and fix the first shell 2 and the second shell 11, and then the two plastic rings 6 are sleeved on the ends of the first shell 2 and the second shell 11, and the iron ring 5 is clamped into the first annular groove 4, and at the same time, one end of the rubber ring 7 is tightly fitted with the ends of the first shell 2 and the second shell 11, and the inner wall of the rubber ring 7 is fitted with the cable 3, and then the user clamps the clamp 10 into the second annular groove 8, so as to fix the plastic ring 6;

[0045] Then, one worker injects the greenhouse curing waterproof glue 18 through the through hole 13, and another worker can reciprocate by pulling the pull rod 904, and the pull rod 904 will cause the two pistons 902 inside the sleeve 901 to move back and forth, and when the piston 902 moves to the right, the second one-way valve 908 on the right second air pipe 909 is closed, and the first one-way valve 907 on the right first air pipe 906 is opened, and the air is discharged through the first air pipe 906, while the second one-way valve 908 on the left second air pipe 909 is opened, and the first one-way valve 907 on the left first air pipe 906 is closed. Since the piston 902 moves to the right, the air on the left side of the first shell 2 will be sucked into the sleeve 901, and the glue will flow to the left side of the first shell 2, and when the piston 902 moves to the left , the second one-way valve 908 on the right second air pipe 909 is opened, and the first one-way valve 907 on the right first air pipe 906 is closed. At the same time, the second one-way valve 908 on the left second air pipe 909 is closed, and the first one-way valve 907 on the left first air pipe 906 is opened. At this time, the air inside the first shell 2 will enter the sleeve 901 through the right second air pipe 909. At this time, the glue will flow to the right side of the first shell 2. This reciprocating process can make the injected glue flow quickly inside the first shell 2, so that the glue can quickly fill the gap between the first shell 2 and the second shell 11 and the shrinkage intermediate joint 1, thereby playing a waterproof role. The setting of the first shell 2 and the second shell 11 can play a mechanical protection role for the shrinkage intermediate joint.

[0046] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A cold shrink intermediate joint with enhanced mechanical protection, comprising a cold shrink intermediate joint (1) and a first shell (2), characterized in that: The top of the first shell (2) is respectively provided with a through hole (13) and a movable component (9), and the movable component (9) comprises second air pipes (909) installed on both sides of the top of the first shell (2), a sleeve (901) is installed between the two second air pipes (909), and two pistons (902) are arranged inside the sleeve (901), and a pull rod (904) extending to the outside of the sleeve (901) is installed on one side of one of the pistons (902), first air pipes (906) are installed on both sides of the top of the sleeve (901), and a first one-way valve (907) is installed on the first air pipe (906), and a second one-way valve (908) is installed on the second air pipe (909).

2. A cold shrink intermediate joint with enhanced mechanical protection according to claim 1, characterized in that: A sealing ring (905) is provided between the sleeve (901) and the pull rod (904), and a pull plate (910) is installed at one end of the pull rod (904).

3. A cold shrink intermediate joint with enhanced mechanical protection according to claim 1, characterized in that: A connecting rod (903) is installed between the two pistons (902), and the outer wall of the piston (902) is tightly fitted with the inner wall of the sleeve (901).

4. A cold shrink intermediate joint with enhanced mechanical protection according to claim 1, characterized in that: The first shell (2) is connected to the second shell (11) via a pin shaft (12), and the shrinkage intermediate joint (1) is located inside the cylinder formed by the first shell (2) and the second shell (11).

5. A cold shrink intermediate joint with enhanced mechanical protection according to claim 4, characterized in that: The second shell (11) and the first shell (2) are both provided with connecting plates (16), and a locking bolt (17) is installed between the two connecting plates (16).

6. A cold shrink intermediate joint with enhanced mechanical protection according to claim 4, characterized in that: A sealing groove (15) is provided in the first shell (2), and a sealing strip (14) extending into the interior of the sealing groove (15) is installed on the second shell (11).

7. The cold shrink intermediate joint with enhanced mechanical protection according to claim 1, characterized in that: The outer walls of the first shell (2) and the second shell (11) are both provided with a first annular groove (4), the ends of the first shell (2) and the second shell (11) are both sleeved with a plastic ring (6), and the inner wall of the plastic ring (6) is provided with an iron ring (5).

8. A cold shrink intermediate joint with enhanced mechanical protection according to claim 7, characterized in that: The outer wall of the plastic ring (6) is provided with a second annular groove (8), and a clamp (10) is clamped in the second annular groove (8).

9. The cold shrink intermediate joint with enhanced mechanical protection according to claim 7, characterized in that: The inner wall of the plastic ring (6) is also provided with a rubber ring (7), and the iron ring (5) is located inside the first annular groove (4).

10. The cold shrink intermediate joint with enhanced mechanical protection according to claim 4, characterized in that: The first shell (2) and the second shell (11) are internally inserted with a cable (3), and the first shell (2) and the second shell (11) are internally filled with greenhouse-cured waterproof glue (18).

Images