A pre-insulated T-connector drain clamp

Abstract

This utility model discloses a pre-insulated T-connector drain clamp, belonging to the field of power equipment technology. It includes a clamp body and a shell. The clamp body includes a semi-circular arc-shaped opening, a fixing plate, and a connecting post. The bottom of the semi-circular arc-shaped opening connects to the fixing plate. A fixing hole for accommodating a locking device is provided at the bottom of the fixing plate. The connecting post is inclined downwards at the bottom of the fixing plate, and a fixing hole for accommodating the locking device is provided on the connecting post. The locking device includes a locking bolt and a torque bolt. There are two locking bolts, spaced a certain distance apart. The locking bolts are connected to the bottom of the fixing plate, and an adjustment feature is provided at the bottom of the locking bolts. Through this utility model, by setting the semi-circular arc-shaped opening and the locking bolts, the semi-circular arc-shaped opening and the arc-shaped clamping block of the locking bolts together form an all-around clamping mechanism, eliminating the need to strip the insulation layer of the main line on-site. The serrated protrusions can easily cut through the oxide film on the surface of the conductor, ensuring good electrical contact and making construction faster and safer.

Description

Technical Field

[0001] This utility model relates to a pre-insulated T-connector lead wire clamp, belonging to the field of power equipment technology. Background Technology

[0002] In the construction and operation and maintenance of power distribution lines, T-clamps connect conductors and feed lines, allowing branch lines to draw power from the main line. By installing dedicated feed lines through openings or branches on the main line, power from the main line is drawn to the feed lines, thus supplying power to user terminals. Currently, T-clamps are widely used in urban and rural power distribution networks for low-voltage distribution network terminal branches and temporary power supply scenarios, and they are characterized by flexible construction and strong compatibility.

[0003] Traditional T-joint conductor clamps are mainly assembled from components such as a metal body, clamping bolts, insulating sleeves, and rubber gaskets. During installation, a certain length of insulation layer must first be stripped from the main conductor. The metal body of the clamp is then inserted into the bare conductor, and the clamp is crimped with bolts. Finally, insulating tape or heat-shrink tubing is applied to the joint for insulation protection. Some products also incorporate copper conductive plates or aluminum alloy bridging plates internally to enhance mechanical strength and conductivity, thereby reducing contact resistance and increasing current carrying capacity.

[0004] In existing technologies, when setting up T-junction drain clamps, it is necessary to first strip the insulation layer of the busbar, and then manually wrap insulating tape or install heat shrink tubing at the joint. This process is complex and inefficient. If the operation is not standardized, defects such as air gaps, looseness, or poor overlap can easily occur, leading to local electric field concentration, insulation aging, and the risk of leakage and short circuit. Using bolt crimping for connection has insufficient reliability. The bolt crimping structure is easily loosened by vibration, resulting in increased contact resistance, severe overheating, and even wire breakage. Traditional metal parts are mostly exposed structures, which are prone to arcing when energized, posing a serious threat to the safety of workers. Split structures have many parts (such as gaskets and bolts), which are prone to falling during high-altitude installation, potentially causing short circuits or personal injury.

[0005] Therefore, it is necessary to design a pre-insulated T-junction drain clamp to solve the problems of complex construction procedures, unstable connections, high risks of live-line work, and high difficulty of high-altitude work. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a pre-insulated T-connector drain clamp, which solves the problems of complex construction procedures, unstable connection, high risk of live work, and difficulty of high-altitude work.

[0007] The technical problem to be solved by this utility model is achieved by the following technical solution: a pre-insulated T-connector lead wire clamp, comprising...

[0008] The main body and outer shell of the wire clamp

[0009] The outer shell is provided on the outside of the clamp body, and the clamp body can connect the wire and the drain wire.

[0010] The main body of the wire clamp includes a semi-circular arc-shaped opening, a fixing plate, and a connecting post. The bottom of the semi-circular arc-shaped opening is connected to the fixing plate. A fixing hole for accommodating a locking device is provided at the bottom of the fixing plate. The connecting post is inclined downward at the bottom of the fixing plate. A fixing hole for accommodating the locking device is provided on the connecting post. The semi-circular arc-shaped opening is provided with serrated protrusions.

[0011] The locking device includes a locking bolt and a torque bolt. There are two locking bolts, which are set at a certain distance apart. The locking bolt is connected to the bottom of the fixing plate, and the torque bolt is set on the side of the connecting column. An adjusting ring is provided at the bottom of the locking bolt.

[0012] Preferably, a clamping block is provided on the top of the locking bolt.

[0013] Preferably, the top of the clamping block is arc-shaped, and the top of the clamping block is provided with serrated protrusions.

[0014] Preferably, the outer shell consists of two pieces, which are connected at the top by a hinge, and the bottom of the outer shell is provided with a buckle, so that the outer shell can wrap around the wire clamp body.

[0015] Preferably, a rubber sealing strip is provided between the two outer shells.

[0016] Preferably, the bottom of the locking bolt extends out of the housing.

[0017] Preferably, the locking bolt of the protruding portion is provided with a protective sleeve, the top of the protective sleeve is provided with a mounting plate, the mounting plate is disposed inside the housing, and the protective sleeve passes through the housing.

[0018] Preferably, the connecting post has a mounting hole in the middle to accommodate the drain wire, and the drain wire can pass through the outer shell and enter the mounting hole.

[0019] Preferably, the clamping block has symmetrically arranged fixing grooves for accommodating fixing pins in the middle of its side surface, and the top of the locking bolt has a boss with a shorter bottom diameter. The fixing pin can engage with the shorter bottom diameter of the boss, and the clamping block does not rotate with the locking bolt when the locking bolt rotates.

[0020] The beneficial effects of this utility model are:

[0021] This invention utilizes a semi-circular opening and a locking bolt. The semi-circular opening and the arc-shaped clamping block of the locking bolt together form an all-around clamping mechanism, eliminating the need to remove the insulation layer of the main line on-site. The serrated protrusions can easily cut through the oxide film on the surface of the conductor, ensuring good electrical contact and making construction faster and safer.

[0022] This invention utilizes an adjusting ring to control the clamping stroke of the main line and incorporates a conical elastic washer. After locking, a continuous pre-tightening force is applied, automatically compensating for stress relaxation caused by thermal expansion and contraction or vibration, preventing loosening and detachment. The drain line is fixed by torque bolts 32, which have a preset breaking torque. A single tightening achieves the standard clamping force, ensuring a constant contact pressure between the drain line and the connecting post over a long period.

[0023] This invention utilizes a one-piece injection molding technology for the outer shell 2. The hinge 22 and buckle 21 are designed for single-handed opening and closing, and the embedded rubber sealing strip 23 ensures overall internal waterproofing. It simplifies the various parts of traditional wire clamps, as the parts are pre-assembled into a single unit. On-site construction only requires positioning the outer shell on the main line and branch lines, tightening the two adjusting rings, and connecting the outer shell, thus simplifying the work process. Attached Figure Description

[0024] Figure 1 This is a side view diagram of the explosion of this utility model.

[0025] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0026] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0027] Figure 4 This is a schematic diagram of the installation of this utility model.

[0028] Figure 5 This is a schematic diagram and cross-sectional view of the locking bolt of this utility model.

[0029] In the diagram: 1-Cable clamp body, 11-Semi-circular opening, 12-Fixing plate, 13-Connecting post, 131-Mounting hole, 2-Outer shell, 21-Snap buckle, 22-Hinge, 23-Rubber sealing strip, 3-Locking device, 31-Locking bolt, 311-Clamping block, 3111-Fixing pin, 312-Adjusting ring, 313-Cylinder sleeve, 32-Torque bolt. Detailed Implementation

[0030] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments. Example 1

[0031] like Figures 1-5 As shown, a pre-insulated T-connector drain clamp includes a clamp body 1 and a housing 2. The housing 2 is provided on the outside of the clamp body 1. The clamp body 1 can connect the conductor and the drain line.

[0032] Reference Figure 1-3 The main body 1 of the wire clamp includes a semi-circular arc opening 11, a fixing plate 12, and a connecting post 13. The bottom of the semi-circular arc opening 11 is connected to the fixing plate 12. A fixing hole for accommodating the locking device 3 is provided directly below the fixing plate 12. The connecting post 13 is inclined downward at the bottom of the fixing plate 12 and has a fixing hole for accommodating the locking device 3.

[0033] The wire clamp body 1 is a one-piece structure. The top structure of the wire clamp body 1 is a semi-circular arc-shaped opening 11. The semi-circular arc-shaped opening 11 is a semi-circular groove with an inner diameter close to the outer diameter of the wire. The opening of the semi-circular groove is provided with rounded corners to protect the insulation layer of the wire. In this embodiment, the semi-circular groove is provided with serrated protrusions perpendicular to the direction of the wire. The serrated protrusions can fix the wire and scratch the oxide layer on the surface of the wire.

[0034] A fixing plate 12 is provided at one end of the semi-circular arc-shaped opening 11, tangent to the semi-circular arc-shaped opening 11 and located directly below it. The thickness of the fixing plate 12 is the same as the thickness of the semi-circular arc-shaped opening 11. A bend is provided at the bottom of the fixing plate 12, with the direction of the bend being the same as that of the semi-circular arc-shaped opening 11. A fixing hole for accommodating the locking device 3 is provided at the bend, with the hole diameter slightly larger than the outer diameter of the bolt. The inner wall of the hole is provided with internal threads or a metal nut can be embedded therein.

[0035] A connecting post 13 is provided at the end of the bend, facing downwards and inclined away from the fixing plate 12. A mounting hole 131 for accommodating the drain cable is provided in the middle of the connecting post 13. A locking device 3 can be provided on the side of the mounting hole 131. The cable can be fixed inside the mounting hole 131 by the locking device 3. In this embodiment, two fixing holes are provided at intervals on the connecting post 13, and the locking device 3 is fixed inside the fixing holes.

[0036] In this embodiment, the semi-circular opening 11 can be used to fix the main trunk line, and the fixing plate 12 and the locking device 3 can cooperate to fix the main trunk line. The connecting post 13 can fix the drain line through the locking device 3, and the drain line passes through the mounting hole 131 and is fixed in the connecting post 11.

[0037] In this embodiment, the fixing plate 12 is provided with two fixing holes at intervals, and each fixing hole can accommodate the locking device 3.

[0038] The locking device 3 includes a locking bolt 31 and a torque bolt 32. The locking bolt 31 is located at the bottom of the fixing plate 12, and the torque bolt 32 is located on the side of the connecting column 13. An adjusting ring 312 is provided at the bottom of the locking bolt 31.

[0039] In this embodiment, a clamping block 311 is provided on the top of the locking bolt 31. The top of the clamping block 311 is arc-shaped, and a serrated protrusion is provided on the top of the clamping block 311. The direction of the serrated protrusion is perpendicular to the arc direction and the same as the fixing direction of the cable. The serrated protrusion can fix the wire and scratch the oxide layer on the surface of the wire.

[0040] Reference Figure 5 In this embodiment, the bottom of the clamping block 311 is provided with a groove to accommodate the locking bolt 31, and symmetrical fixing grooves to accommodate the fixing pin 3111 are provided on the middle of the side of the clamping block. The top of the locking bolt 31 is provided with a boss, the bottom diameter of which is shorter, so that the fixing pin 3111 can engage with the shorter bottom diameter of the boss. This ensures that the clamping block 311 does not rotate with the locking bolt 31 during rotation. In this embodiment, a tapered elastic washer is provided on the locking bolt 31 to effectively compensate for stress relaxation during operation.

[0041] When assembling the locking bolt 31 and the clamping block 311, first place the locking bolt 31 in the groove at the bottom of the clamping block 311, and then connect the fixing pin 3111 in the fixing groove to ensure that the top of the locking bolt 31 is fixed inside the clamping block 311.

[0042] The entire locking bolt 31 is threaded, and the adjusting ring 312 is fixed to the bottom of the locking bolt 31. When the adjusting ring 312 rotates, the locking bolt 31 can rotate with the adjusting ring 312, and the rotation of the locking bolt 31 can be controlled by rotating the adjusting ring 312.

[0043] At the bottom of the locking bolt 31, a protective sleeve 313 is provided at the top of the adjusting ring 312. The protective sleeve 313 is a cylindrical structure, and its diameter is slightly larger than that of the locking bolt 31. The protective sleeve 313 has no internal threads. In this embodiment, there are two locking bolts 31 and only one protective sleeve 313. The protective sleeve 313 has two cylindrical structures, both of which can accommodate the locking bolts 31. The tops of the two cylindrical structures are connected by a mounting plate.

[0044] A torque bolt 32 is disposed on the side of the connecting post 13. Two fixing holes are spaced apart on the side of the connecting post 13, and threads are provided in the fixing holes. The torque bolt 13 can be fixed in the fixing holes on the side of the connecting post 13. In this embodiment, a commercially available torque bolt 13 is used. After a specified torque is applied to the torque bolt 13, the head of the torque bolt 13 can break, ensuring that the torque meets the set value.

[0045] In this embodiment, the locking bolt 31 is connected with the clamping block 311 to fix the main line; the drain line can be fixed in the mounting hole 131 of the connecting column 13 by the torque bolt 32.

[0046] When installing the locking bolt 31 onto the fixing plate 12, first connect the locking bolt 31 to the fixing plate 12, and then install the clamping block 311. Ensure that the distance between the clamping block 311 and the semi-circular opening 11 can be adjusted when the locking bolt 31 rotates. During the rotation of the locking bolt 31, the edge of the clamping block 311 is in contact with the edge of the fixing plate 12, and the clamping block 311 only slides and does not rotate with the locking bolt 31.

[0047] By rotating the locking bolt 31, the distance between the clamping block 311 and the semi-circular opening 11 is adjusted, and the main line can be fixed between the clamping block 311 and the semi-circular opening 11.

[0048] In this embodiment, a shell 2 is provided on the outer side of the wire clamp body 1. The shell 2 consists of two pieces, and the combined shell 2 can cover the wire clamp body 1. The top of the shell 2 is connected by three or more integrated plastic hinges, which can be rotated to control the angle. A latch 21 is symmetrically provided on the bottom of the shell 2. The shells 2 are connected by latches 21. A rubber sealing strip 23 is embedded in the opening and closing edge groove along the inner side of the shell 2, and the rubber sealing strip 23 can achieve waterproofing.

[0049] In this embodiment, two holes are provided on one side of the outer casing 2, and the positions of the holes correspond to the positions of the locking bolts 31. The locking bolts 31 can pass through the holes of the outer casing 2, and the protective sleeve 313 mounting plate is located inside the outer casing 2, with the cylindrical structure of the protective sleeve 313 passing through the outer casing 2.

[0050] A mounting hole 131 for accommodating the drain wire is provided in the middle of the connecting post 13, and the drain wire can pass through the outer casing 2 and enter the mounting hole 131.

[0051] After the outer shell 2 closes and locks in place at the bayonet 21, it encloses the wire clamp body 1 and the locking device 3, forming a safe space. Furthermore, the outer shell 2 is connected by the hinge 22, simplifying the high-altitude installation process. The rubber sealing strip 23 ensures long-term stable operation under different climatic conditions.

[0052] In this embodiment, the specific installation steps are as follows:

[0053] Assemble housing 2. The two housings 2 are connected by hinge 22. Rubber sealing strip 23 is placed inside housing 2. Protective sleeve 313 is placed inside housing 2, and wire clamp body 1 is placed inside housing 2.

[0054] Screw the locking bolt 31 into the bottom of the fixing plate 12. A clamping block 311 is installed on the top of the locking bolt 31. The clamping block 311 engages with the boss on the top of the locking bolt 31 via a fixing pin 3111, ensuring that the clamping block 311 does not rotate when the locking bolt 31 rotates. An adjusting pin 312 is installed at the bottom of the locking bolt 31. The other locking bolt 31 undergoes the same steps.

[0055] The clamp body 1 is placed on the main line, and the main line is fixed inside the clamp body 1 by rotating the adjusting ring 312. One end of the main line is connected to the semi-circular arc opening 11, and the other end is connected to the clamping block 311.

[0056] The drain line is installed in the mounting hole 131 of the connecting post 13 and fixed by the torque bolt 32.

[0057] Rotate the other outer shell 2 and connect the two outer shells 2 using the clip 21.

[0058] In this embodiment, the wire clamp body 1, through the structural arrangement of the semi-circular arc opening 11, the fixing plate 12, and the connecting post 13, can effectively compensate for its stress deformation, thereby effectively compensating for the stress relaxation caused by thermal expansion and contraction of the wire clamp and effectively preventing the wire clamp from loosening.

[0059] The clamping point adopts an arc-shaped structure to ensure maximum contact area and features serrated protrusions to easily pierce the oxide layer on the conductor surface, resulting in more reliable contact. The conductor is clamped vertically, so that the applied pressure acts directly on the conductor. The locking bolt 31 is equipped with a conical elastic washer to effectively compensate for stress relaxation during operation.

[0060] The drain line uses a torque bolt 32 locking method. During installation, you only need to unscrew the bolt head to ensure that the drain line receives constant contact pressure.

[0061] The outer shell 2 adopts one-piece injection molding technology, and the metal conductor is completely covered with plastic with excellent insulation and weather resistance to ensure its good contact performance.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pre-insulated T-connector drain clamp, comprising: The main body and outer shell of the wire clamp The outer shell is provided on the outside of the clamp body, and the clamp body can connect the wire and the drain wire. Its features are: The main body of the wire clamp includes a semi-circular arc-shaped opening, a fixing plate, and a connecting post. The bottom of the semi-circular arc-shaped opening is connected to the fixing plate. A fixing hole for accommodating a locking device is provided at the bottom of the fixing plate. The connecting post is inclined downward at the bottom of the fixing plate. A fixing hole for accommodating the locking device is provided on the connecting post. The semi-circular arc-shaped opening is provided with serrated protrusions. The locking device includes a locking bolt and a torque bolt. There are two locking bolts, which are set at a certain distance apart. The locking bolt is connected to the bottom of the fixing plate, and the torque bolt is set on the side of the connecting column. An adjusting ring is provided at the bottom of the locking bolt.

2. A pre-insulated T-junction tap, according to claim 1, characterised in that: A clamping block is provided at the top of the locking bolt.

3. A pre-insulated T-junction tap, according to claim 2, characterised in that: The top of the clamping block is arc-shaped, and the top of the clamping block is provided with serrated protrusions.

4. A pre-insulated T-junction tap, according to claim 1, characterized in that: The outer shell consists of two pieces, which are connected at the top by a hinge. The bottom of the outer shell is provided with a buckle, and the outer shell can wrap around the main body of the wire clamp.

5. A pre-insulated T-junction tap, according to claim 4, characterised in that: A rubber sealing strip is provided between the two outer shells.

6. A pre-insulated T-junction line tap according to claim 4, characterized in that: The bottom of the locking bolt extends out of the housing.

7. A pre-insulated T-connector lead clamp according to claim 6, characterized in that: The locking bolt of the protruding part is provided with a protective sleeve, and a mounting plate is provided on the top of the protective sleeve. The mounting plate is located inside the housing, and the protective sleeve passes through the housing.

8. A pre-insulated T-junction tap, according to claim 6, characterised in that: The connecting column has a mounting hole in the middle to accommodate the drain wire, which can pass through the outer shell and enter the mounting hole.

9. A pre-insulated T-junction line tap according to claim 2, characterized in that: The clamping block has symmetrically arranged fixing grooves for accommodating fixing pins on its side center. The top of the locking bolt has a boss with a shorter bottom diameter. The fixing pin can engage with the shorter bottom diameter of the boss. When the locking bolt rotates, the clamping block does not rotate with the locking bolt.

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