Pre-insulated parallel groove clamp

Abstract

The invention discloses a pre-insulation parallel groove clamp which comprises an upper insulation shell, a lower insulation shell and a protection mechanism, the upper insulation shell and the lower insulation shell are detachably connected, and the upper insulation shell and the lower insulation shell define a cavity for a cable to penetrate through. Conductive clamping plates used for clamping and fixing a cable are arranged in the upper insulating shell and the lower insulating shell. The protection mechanisms are located at the two ends of the upper insulating shell and the two ends of the lower insulating shell and used for blocking dirt. The pre-insulation parallel groove clamp is simple in structure and reasonable in design, and through the upper insulation shell, the lower insulation shell and the protection mechanism, when the pre-insulation parallel groove clamp operates in rainy days, rainwater, dust and other dirt are not prone to being transmitted to the conductive clamping plates in the upper insulation shell and the lower insulation shell, so that a cable is not prone to being corroded, the service life of the cable is prolonged, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of parallel groove line clamps, and in particular to a pre-insulated parallel groove line clamp. Background Art

[0002] Pre-insulated parallel groove clamps are hardware used for paralleling, branching, or jumpering insulated conductors in power distribution lines. Pre-insulated parallel groove clamps are characterized by a pre-coated insulating material coating on the metal clamp. No additional insulation treatment is required during installation, allowing them to be used directly for connecting live or dead conductors while ensuring both electrical insulation and mechanical strength.

[0003] Deficiencies of existing technology: The above-mentioned pre-insulated parallel groove wire clamp is easily exposed to the air for a long time, and is easily exposed to moisture, oxygen and dust in the air, so that dirt such as moisture and dust can be easily transmitted into the wire clamp inside the pre-insulated parallel groove wire clamp, which can easily corrode the cable, affect the service life of the cable, and cause safety hazards. Summary of the Invention

[0004] The object of the present invention is to provide a pre-insulated parallel groove clamp to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A pre-insulated parallel groove wire clamp comprises an upper insulating shell, a lower insulating shell and a protective mechanism. The upper insulating shell and the lower insulating shell are detachably connected, and the upper insulating shell and the lower insulating shell together form a cavity for the cable to pass through. Conductive clamps for clamping and fixing the cable are provided in the upper insulating shell and the lower insulating shell. The protective mechanism is located at both ends of the upper insulating shell and the lower insulating shell to block dirt.

[0006] Preferably, the protection mechanism includes: An upper protective sleeve, wherein the upper protective sleeves are provided in plurality and are divided into two groups, wherein the upper protective sleeves in each group are respectively located on both sides of the upper insulating shell and connected to the upper insulating shell, each upper protective sleeve is sleeved on the side wall of the cable, and the outer contour of each upper protective sleeve gradually decreases in a direction away from the upper insulating shell; The lower protective sleeve has multiple lower protective sleeves and corresponds one to one with the upper protective sleeve. Each lower protective sleeve is located at the bottom of the upper protective sleeve. Each lower protective sleeve is sleeved on the side wall of the cable and connected to the side wall of the lower insulating shell. The outer contour of each lower protective sleeve gradually decreases in the direction away from the lower insulating shell, and the side of the lower protective sleeve close to the upper protective sleeve extends to the inner side of the upper protective sleeve.

[0007] Preferably, a drainage groove is provided at the bottom of each lower protective sleeve, and an inwardly protruding water retaining bar is provided on the inner side wall of the upper protective sleeve and the lower protective layer. The water retaining bar is located on the side of the drainage groove close to the lower insulating shell.

[0008] Preferably, a plurality of drainage holes are formed through the lower insulating shell.

[0009] Preferably, a plurality of fixing bolts are provided in the upper insulating shell, and the fixing bolts are evenly distributed along the length direction of the cable. The two ends of each fixing bolt are sleeved with insulating torque caps, and the two insulating torque caps are respectively connected to the top of the upper insulating shell and the bottom of the lower insulating shell. A guide hole is provided in the upper insulating shell, and a plurality of guide columns are provided in the lower insulating shell. The guide columns correspond one-to-one to the fixing bolts, and each guide column is used to be plugged into the guide hole. A vertical hole for a fixing screw to pass through is coaxially provided on each guide column.

[0010] Preferably, the cross section of the guide hole is fan-shaped, and when the guide hole is used to fix two cables of different diameters, the upper insulating shell and the lower insulating shell are deflected.

[0011] Preferably, a plurality of reinforcing ribs are provided on the top of the upper insulating shell and the bottom of the lower insulating shell, and the plurality of reinforcing ribs correspond one-to-one to a plurality of insulating torque caps, and each of the reinforcing ribs is located at the top or bottom of the fixing bolt.

[0012] Preferably, there are multiple conductive clamps, and the multiple conductive clamps are distributed along the length direction of the cable. Both ends of each conductive clamp are provided with fixing grooves for clamping the cable core, and the groove walls of the fixing grooves are provided with teeth, which are used to abut against the side walls of the cable.

[0013] Preferably, a sealing mechanism is provided on both sides of each of the conductive splints, and each of the sealing mechanisms comprises: An arc-shaped block, the arc-shaped block is located on one side of the conductive clamping plate, the concave arc side of the arc-shaped block faces the side wall of the cable and is used to abut against the side wall of the cable, and the side wall of the arc-shaped block is slidably connected to the inner side wall of the upper insulating shell or the lower insulating shell; a second airbag, wherein the second airbag is connected to a side of the arc-shaped block away from the cable, and a side wall of the second airbag on the side away from the cable is connected to an inner side wall of the upper insulating shell or the lower insulating shell; The first airbag is located on the side of the conductive splint close to the arc block, one side of the first airbag is in contact with the side wall of the conductive splint, the bottom of the first airbag is connected with the bottom of the second airbag, the first airbag is arc-shaped, and the concave arc side of the first airbag is used to wrap the cable on one side of the conductive splint. The curvature of the outer side wall of each first airbag is greater than 180 degrees, and the first airbag is made of soft silicone rubber.

[0014] Preferably, the curvature of the outer side wall of each of the first airbags is greater than 180 degrees, and the first airbags are made of soft silicone rubber, and each of the second airbags are made of hard EPDM rubber.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This pre-insulated parallel groove wire clamp has protective mechanisms on the upper and lower insulating shells, which prevents moisture, dust and other contaminants from being transmitted into the upper and lower insulating shells, thereby reducing damage to the wire clamp caused by contaminants. It also makes the cable less likely to corrode in the pre-insulated parallel groove wire clamp, thereby protecting the cable, extending the service life of the cable, and reducing safety hazards. 2. This pre-insulated parallel groove wire clamp is provided with a sealing mechanism. When the upper insulating shell and the lower insulating shell move in a direction approaching each other, the cable is clamped and limited by the arc block, and the arc blocks located on both sides of the conductive clamping plate are squeezed between the upper insulating shell and the lower insulating shell, so that the arc blocks on both sides of the conductive clamping plate move synchronously with the cable, thereby squeezing the arc blocks away from the second air bag on one side of the cable, so that the gas in the second air bag is transmitted to the first air bag under the action of pressure, and the first air bag is deformed. When the upper insulating shell and the lower insulating shell are in contact, the first air bag in the upper insulating shell abuts against the corresponding first air bag in the lower insulating shell and wraps the cable located at the conductive clamping plate in a circular shape, thereby forming an insulating seal, so that moisture, dust and other dirt are not easily transmitted to the connection part between the conductive clamping plate and the cable, so that the cable is not easily corroded, further reducing safety hazards and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an exploded schematic diagram of a part of the structure of the present invention, mainly showing the teeth; Figure 3 It is an exploded schematic diagram of a part of the structure of the present invention, mainly showing the fixing bolts; Figure 4 It is a cross-sectional schematic diagram of a part of the structure of the present invention, mainly showing the fracture groove; Figure 5 It is an exploded schematic diagram of a part of the structure of the present invention, mainly showing the guide column; Figure 6It is a partial structural diagram of the present invention, mainly showing the arc block; Figure 7 It is a partial structural diagram of the present invention, mainly showing the sealing mechanism.

[0017] In the figure: 11. Upper insulating shell; 12. Lower insulating shell; 13. Conductive splint; 14. Drain hole; 2. Protective mechanism; 21. Upper protective cover; 22. Lower protective cover; 31. Drain groove; 32. Water retaining bar; 41. Fixing bolt; 42. Insulating torque cap; 43. Guide hole; 44. Guide column; 45. Vertical hole; 5. Reinforcement rib; 6. Fixing groove; 61. Teeth; 7. Sealing mechanism; 71. First airbag; 72. Second airbag; 73. Arc block; 8. Gasket; 9. Fracture groove. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to 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, rather than indicating or implying 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.

[0020] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "disposed" should be understood broadly. For example, they can refer to fixed connection or disposition, detachable connection or disposition, or integrated connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0022] Example 1: See also Figure 1-5 As shown, the present invention provides a pre-insulated parallel groove clamp technical solution: A pre-insulated parallel groove clamp includes an upper insulating shell 11 and a lower insulating shell 12. The upper insulating shell 11 and the lower insulating shell 12 together form a cavity for the cable to pass through. Several fixing bolts 41 are installed in the upper insulating shell 11. Specifically, there are two fixing bolts 41, and the two fixing bolts 41 are distributed along the length of the cable. Both ends of each fixing bolt 41 are sleeved on an insulating torque cap 42. The horizontally arranged insulating torque cap 42 is located at the top of the upper insulating shell 11 or the bottom of the lower insulating shell 12 and is rotatably connected to the top of the upper insulating shell 11 or the bottom of the lower insulating shell 12. Each torque cap is provided with a breaking groove 9, which breaks when tightened to a set torque. A gasket 8 is installed at the bottom of each insulating torque cap 42, and the bottom of the gasket 8 abuts the top of the upper insulating shell 11. A guide hole 43 is vertically opened in the insulating shell, and the guide hole 43 is coaxially arranged with the fixing bolt 41. Several guide posts 44 are installed in the lower insulating shell 12. Specifically, there are two guide posts 44, and the two guide posts 44 correspond one-to-one with the two fixing bolts 41. Each guide post 44 is used to plug into the guide hole 43. Specifically, the cross-section of the guide hole 43 is fan-shaped. When the two cables on the conductive clamping plate 13 are different, the upper insulating shell 11 and the lower insulating shell 12 are deflected through the guide hole 43 to accommodate two cables of different diameters, expanding the scope of use. Each guide post 44 is coaxially opened with a vertical hole 45 for the fixing bolt 41 to pass through. Several reinforcing ribs 5 are installed on the top of the upper insulating shell 11 and the bottom of the lower insulating shell 12 to strengthen the structural strength, making it difficult for the fixing bolt 41 to crush the upper insulating shell 11.

[0023] When the upper insulating shell 11 is connected to the lower insulating shell 12, the staff inserts the fixing bolt 41 into the vertical hole 45, so that the guide column 44 is plugged into the guide hole 43. At this time, the staff rotates the two insulating torque caps 42. When the fixing bolt 41 is rotated to the set torque, the insulating torque cap 42 is disconnected from the breaking groove 9, thereby reminding the staff that the upper insulating shell 11 and the lower insulating shell 12 have been transferred to the set position and improving the uniformity of the installation.

[0024] A plurality of drainage holes 14 are provided at the bottom of the lower insulating shell 12. Protective mechanisms 2 are installed on the two side walls of the upper insulating shell 11 and the lower insulating shell 12 close to the cable. There are four protective mechanisms 2, and the four protective mechanisms 2 are divided into two groups. Each protective mechanism 2 includes an upper protective sleeve 21 and a lower protective layer. Each upper protective sleeve 21 is sleeved on the side wall of the cable and fixedly connected to the side wall of the upper insulating shell 11. The inner diameter of the circular ring on the vertical surface where the outer contour of each upper protective sleeve 21 is located gradually decreases in the direction away from the upper insulating shell 11. The lower protective sleeve 22 is located at the bottom of the upper protective sleeve 21, and each lower protective sleeve 22 is sleeved on the side wall of the cable and fixedly connected to the side wall of the lower insulating shell 12. The inner diameter of the circular ring on the vertical surface where the outer contour of each lower protective sleeve 22 is located gradually decreases in the direction away from the lower insulating shell 12, and the side of the lower protective sleeve 22 close to the upper protective sleeve 21 extends to the inner side of the upper protective sleeve 21. Each lower protective cover 22 is provided with a drainage groove 31 , and an inwardly protruding water retaining bar 32 is installed on the inner side wall of each upper protective cover 21 and lower protective cover 22 . The water retaining bar 32 is located on a side of the drainage groove 31 close to the lower insulating shell 12 .

[0025] When the pre-insulated parallel groove clamp is used to connect the cable on a rainy day, the rainwater is not easily transmitted to the upper insulating shell 11 and the lower insulating shell 12 after passing through the upper protective sleeve 21 and the lower protective sleeve 22. At the same time, if the rainwater is transmitted along the cable to the upper protective sleeve 21 and the lower protective sleeve 22, the inwardly protruding water retaining bar 32 blocks the rainwater, so that the rainwater is blocked on the side away from the upper insulating shell 11 and the lower insulating shell 12. Driven by its own gravitational potential energy, the rainwater passes through the drainage groove 31 and separates from the lower protective sleeve 22, further making it difficult for the rainwater to be transmitted to the upper insulating shell 11 and the lower insulating shell 12. In addition, when the rainwater is transmitted to the lower insulating shell 12, the rainwater is separated from the lower insulating shell 12 through the drainage hole 14, thereby making it difficult to corrode the cable, protecting the cable and extending the service life of the cable.

[0026] Multiple conductive clamps 13 are installed in the upper insulating shell 11 and the lower insulating shell 12. The conductive clamps 13 are distributed along the transmission direction of the cable. The conductive clamps 13 in the upper insulating shell 11 and the conductive clamps 13 in the lower insulating shell 12 are arranged opposite to each other. Both ends of each conductive clamp 13 are provided with fixing grooves 6 for clamping the cable core, and the side walls of each fixing groove 6 are installed with teeth 61, which are used to abut against the side walls of the cable.

[0027] When this embodiment is in use, the staff transmits the cable to the conductive clamping plate 13 on the lower insulating shell 12 and the upper insulating shell 11. The staff adjusts the fixing bolt 41 so that the fixing bolt 41 passes through the vertical hole 45. Then, the staff adjusts the insulating torque cap 42 so that the upper insulating shell 11 and the lower insulating shell 12 move in a direction approaching each other until the upper insulating shell 11 and the lower insulating shell 12 are connected. On rainy days, rainwater is not easily transmitted into the upper insulating shell 11 and the lower insulating shell 12 after passing through the upper protective cover 21 and the lower protective cover 22. At the same time, when rainwater is transmitted along the cable into the upper protective cover 21 and the lower protective cover 22, the inwardly protruding water retaining bar 32 blocks the rainwater, so that the rainwater is blocked on the side away from the upper insulating shell 11 and the lower insulating shell 12. After passing through the drainage groove 31, the rainwater is separated from the lower protective cover 22, further making it difficult for rainwater or dust and other dirt to be transmitted into the upper insulating shell 11 and the lower insulating shell 12, so that rainwater is not easily in contact with the wire clamp and corrodes the wire clamp and the cable, thereby protecting the cable and extending the service life of the cable.

[0028] Example 2: A pre-insulated parallel groove clamp, such as Figure 6 and Figure 7 In order to seal the cable at the conductive clamping plate 13, this embodiment makes the following improvements based on the embodiment 1: Both the upper and lower insulating shells 11, 12 are equipped with sealing mechanisms 7. There are multiple sealing mechanisms 7, each comprising a first airbag 71, a second airbag 72, and an arc-shaped block 73. There are multiple vertically arranged first airbags 71, located on either side of each conductive clamping plate 13 within the upper or lower insulating shell 11, 12, and abutting the sidewalls of the conductive clamping plates 13. Each first airbag 71 is arc-shaped, with the concave side of the first airbag 71 facing the sidewall of the cable and abutting against it. The first airbags 71 are made of a soft rubber such as silicone rubber. The outer wall of each first airbag 71 has a curvature greater than 180 degrees, while the inner wall of each first airbag 71 has a curvature no greater than 180 degrees. The two ends of the first airbag 71 are soft areas, while the rest of the first airbag 71 is hard. When the ends of the corresponding two first airbags 71 abut against each other, the soft area of the first airbag 71 undergoes a larger elastic deformation, and the hard area of the first airbag 71 undergoes a smaller elastic deformation, so that the corresponding two first airbags 71 tightly wrap the cable located at the conductive clamp 13 in a circular shape.

[0029] The horizontally arranged second airbag 72 is located on the side of the first airbag 71 away from the conductive splint 13, and the second airbag 72 and the first airbag 71 form an L shape, that is, the second airbag 72 is the horizontal part of the L shape, and the first airbag 71 is the vertical part of the L shape. The bottom of the second airbag 72 is connected with the bottom of the first airbag 71, so that the gas in the second airbag 72 is easily transmitted to the first airbag 71, and because the bottom of the second airbag 72 is connected with the bottom of the first airbag 71, when the second airbag 72 is deformed, the side of the first airbag 71 close to the second airbag 72 is not easy to bend or deflect with the first airbag 71, so that the first airbag 71 can only deform in the vertical direction, so that the corresponding two first airbags 71 are circularly wrapped around the cable at the conductive splint 13. In addition, the second airbag 72 is made of hard rubber such as EPDM rubber, so that the second airbag 72 undergoes smaller deformation when deformed, and more gas in the second airbag 72 is transmitted to the first airbag 71, thereby causing the first airbag 71 to undergo larger deformation.

[0030] There are several arc blocks 73, and each arc block 73 is located on the side of the first airbag 71 away from the conductive clamping plate 13. The arc block 73 is located on the side of the second airbag 72 close to the cable and is fixedly connected to the second airbag 72. The concave arc side of the arc block 73 faces the side wall of the cable and abuts against the side wall of the cable, thereby clamping and limiting the cable. The bottom of each arc block 73 located in the upper insulating shell 11 is used to abut the top of the corresponding arc block 73 located in the lower insulating shell 12. When the upper insulating shell 11 and the lower insulating shell 12 approach each other, the corresponding arc block 73 moves along the side close to the second airbag 72 under the pressure of the cable, thereby squeezing the second airbag 72. After the gas in the second airbag 72 is transferred to the first airbag 71, the first airbag 71 is deformed, so that the corresponding two first airbags 71 wrap around the cable in a circular shape.

[0031] When the staff uses the pre-insulated parallel groove clamp, the upper insulating shell 11 and the lower insulating shell 12 approach each other, thereby adjusting the distance between the upper insulating shell 11 and the lower insulating shell 12, thereby squeezing the arc block 73, and the arc block 73 moves along the side close to the second air bag 72, so that the gas in the second air bag 72 is squeezed into the first air bag 71, and through the soft area and hard area of the first air bag 71, the two corresponding first air bags 71 are wrapped in a circular ring shape around the cables on both sides of the conductive splint 13, thereby sealing the conductive splint 13, making it difficult for dirt to be transmitted to the conductive splint 13, and making it difficult for dirt to accumulate and cause poor contact between the cable and the conductive splint 13, so that it is not easy to cause a fire due to excessive local resistance, thereby improving safety. At the same time, the outer curvature of each first airbag 71 exceeds 180 degrees, so that when the ends of the two first airbags 71 abut against each other, the soft area of each first airbag 71 is deformed, and the side wall of the cable is completely and fully wrapped, making it difficult for the cable to detach from the first airbag 71 at will, thereby improving the stability of the cable. On the other hand, the pressure between the side wall of the cable and the arc block 73 increases, further increasing the friction between the side wall of the cable and the side wall of the arc block 73, further making it difficult for the cable to detach from the arc block 73. In addition, the elastic deformation of the arc block 73 generates centripetal force, and the surface of the cable is subjected to uniform pressure, so that the cable is not easily damaged due to excessive local pressure, thereby extending the service life of the cable.

[0032] When using this embodiment, the staff transfers the cable to the conductive clamping plate 13 on the lower insulating shell 12 and the upper insulating shell 11, and clamps and positions the cable through the arc block 73 to improve the stability of the cable. The upper insulating shell 11 and the lower insulating shell 12 move in a direction close to each other, thereby squeezing the arc block 73. The arc block 73 moves in a direction close to the second airbag 72, thereby causing the second airbag 72 to deform, and part of the gas in the second airbag 72 is squeezed into the first airbag 71. The first airbag 71 is deformed, so that the two first airbags 71 gradually merge from two semicircular rings into a circular ring and then wrap the cable on the conductive clamping plate 13. When the arc block 73 in the upper insulating shell 11 abuts against the end of the arc block 73 in the corresponding lower insulating shell 12, Through the soft area and hard area of the first airbag 71, two annular first airbags 71 are formed to fit tightly with the conductive clamping plate 13, thereby sealing the conductive clamping plate 13 and the cable, so that the dust in the upper insulating shell 11 and the dust in the lower insulating shell 12 are not easily transferred to the conductive clamping plate 13 after passing through the first airbag 71, so that dirt is not easy to accumulate and cause poor contact between the cable and the conductive clamping plate 13, so that it is not easy to cause a fire due to excessive local resistance, thereby improving safety. At the same time, it makes the cable less likely to be corroded, thereby protecting the cable and extending the service life of the cable.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-insulated parallel groove clamp, characterized by: The utility model comprises an upper insulating shell (11), a lower insulating shell (12) and a protective mechanism (2), wherein the upper insulating shell (11) and the lower insulating shell (12) are detachably connected, and the upper insulating shell (11) and the lower insulating shell (12) together form a cavity for a cable to pass through, and the upper insulating shell (11) and the lower insulating shell (12) are both provided with a conductive clamping plate (13) for clamping and fixing the cable, and the protective mechanism (2) is located at both ends of the upper insulating shell (11) and the lower insulating shell (12) for blocking dirt.

2. The pre-insulated parallel groove clamp according to claim 1, characterized in that: The protection mechanism (2) comprises: An upper protective sleeve (21), wherein there are a plurality of upper protective sleeves (21), and the plurality of upper protective sleeves (21) are divided into two groups, each group of upper protective sleeves (21) is respectively located on both sides of the upper insulating shell (11) and connected to the upper insulating shell (11), each upper protective sleeve (21) is sleeved on the side wall of the cable, and the outer contour of each upper protective sleeve (21) is gradually reduced in a direction away from the upper insulating shell (11); A lower protective sleeve (22), wherein there are a plurality of lower protective sleeves (22) and the lower protective sleeves (22) correspond one to one with the upper protective sleeve (21), each lower protective sleeve (22) is located at the bottom of the upper protective sleeve (21), each lower protective sleeve (22) is sleeved on the side wall of the cable and connected to the side wall of the lower insulating shell (12), the outer contour of each lower protective sleeve (22) gradually decreases in a direction away from the lower insulating shell (12), and the side of the lower protective sleeve (22) close to the upper protective sleeve (21) extends to the inner side of the upper protective sleeve (21).

3. The pre-insulated parallel groove clamp according to claim 2, characterized in that: A drainage groove (31) is provided at the bottom of each lower protective sleeve (22), and an inwardly protruding water retaining strip (32) is provided on the inner side wall of the upper protective sleeve (21) and the lower protective layer. The water retaining strip (32) is located on a side of the drainage groove (31) close to the lower insulating shell (12).

4. The pre-insulated parallel groove clamp according to claim 1, characterized in that: A plurality of drainage holes (14) are provided through the lower insulating shell (12).

5. The pre-insulated parallel groove clamp according to claim 1, characterized in that: A plurality of fixing bolts (41) are provided in the upper insulating shell (11), and the fixing bolts (41) are evenly distributed along the length direction of the cable. Both ends of each fixing bolt (41) are sleeved with insulating torque caps (42), and the two insulating torque caps (42) are respectively connected to the top of the upper insulating shell (11) and the bottom of the lower insulating shell (12). A guide hole (43) is provided in the upper insulating shell (11), and a plurality of guide columns (44) are provided in the lower insulating shell (12). The guide columns (44) correspond to the fixing bolts (41) one by one, and each guide column (44) is used to be plugged into the guide hole (43). Each guide column (44) is coaxially provided with a vertical hole (45) for the fixing screw (41) to pass through.

6. The pre-insulated parallel groove clamp according to claim 5, characterized in that: The cross section of the guide hole (43) is fan-shaped. When the guide hole (43) is used to fix two cables of different diameters, the upper insulating shell (11) and the lower insulating shell (12) are deflected.

7. The pre-insulated parallel groove clamp according to claim 5, characterized in that: A plurality of reinforcing ribs (5) are provided on the top of the upper insulating shell (11) and the bottom of the lower insulating shell (12), the plurality of reinforcing ribs (5) correspond one-to-one to the plurality of insulating torque caps (42), and each of the reinforcing ribs (5) is located at the top or bottom of the fixing bolt (41).

8. The pre-insulated parallel groove clamp according to claim 1, characterized in that: There are a plurality of conductive clamps (13), and the plurality of conductive clamps (13) are distributed along the length direction of the cable. Both ends of each conductive clamp (13) are provided with a fixing groove (6) for clamping the cable core. The groove wall of the fixing groove (6) is provided with teeth (61), and the teeth (61) are used to abut against the side wall of the cable.

9. The pre-insulated parallel groove clamp according to claim 8, characterized in that: A sealing mechanism (7) is provided on both sides of each conductive clamping plate (13), and each sealing mechanism (7) comprises: An arc block (73), the arc block (73) being located on one side of the conductive clamping plate, the concave arc side of the arc block (73) facing the side wall of the cable and being used to abut against the side wall of the cable, the side wall of the arc block (73) being slidably connected to the inner side wall of the upper insulating shell (11) or the lower insulating shell (12); a second airbag (72), the second airbag (72) being connected to a side of the arc block (73) away from the cable, and a side wall of the second airbag (72) away from the cable being connected to an inner side wall of the upper insulating shell (11) or the lower insulating shell (12); A first airbag (71), the first airbag (71) is located on a side of the conductive clamp (13) close to the arc block (73), one side of the first airbag (71) abuts against the side wall of the conductive clamp (13), the bottom of the first airbag (71) is connected to the bottom of the second airbag (72), the first airbag (71) is in an arc shape, and the concave arc side of the first airbag (71) is used to wrap the cable on one side of the conductive clamp (13).

10. The pre-insulated parallel groove clamp according to claim 9, characterized in that: The curvature of the outer side wall of each first airbag (71) is greater than 180 degrees, and the first airbag (71) is made of soft silicone rubber, and each second airbag (72) is made of hard EPDM rubber.

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