A cable hole plugging device for a distribution box

Abstract

The present invention relates to a cable hole plugging device for a distribution box, comprising a plugging layer, an air pump push rod, a cam link, and an auxiliary fixing part. When the link is in use, the linear reciprocating motion of the push rod drives the plugging layer to perform a rotational motion. The plugging layer includes an active plugging layer and a driven plugging layer. The movement of the active plugging layer drives the rotation of the cam, which in turn drives the spiral movement of the driven plugging layer, completing the motion conversion from linear motion to rotational motion. The blades of the active plugging layer and the driven plugging layer move along the spiral line simultaneously, and the planes of the inner and outer circles will open and close accordingly. By changing the stroke of the push rod, the size of the plugging hole can be changed. When it is completely closed, the center of the circle is the intersection point of the tips of the rotating blades. By applying pressure, the gap between the fireproof fabric and the cable is eliminated, so as to prevent external air and liquid from entering, and play the functions of fire prevention and waterproofing.

Description

Technical Field:

[0001] The present invention belongs to the technical field of power generation auxiliary equipment, and particularly relates to a cable hole plugging device for a distribution box. Background Art:

[0002] The plugging of cable holes in the distribution box is a key link for fire prevention, moisture prevention, and prevention of small animal intrusion in the substation. Due to the irregular shape of the plugging environment and the presence of many obstacles, it is very difficult to control the construction plugging quality. At the same time, when the cable holes in the distribution box are fixed, since the cable models often have different sizes, the plugging is often not tight during the plugging process. All these will lead to events such as small animal intrusion and equipment moisture during the operation of the equipment. Currently, the operation and maintenance cycle of unmanned substations is relatively long, and it is very difficult for operation and maintenance personnel to detect plugging loopholes and potential hazards in a timely manner. Generally, it can only be discovered after several days or even dozens of days, which brings great potential safety hazards.

[0003] Currently, during the electrical laying process, plugging mud is commonly used for cable plugging. Although the plugging mud is plastic and convenient for construction and maintenance, it is easily affected by temperature, and its shape will change with the environmental temperature. When heated, the plugging mud will soften and overflow glue. When cooled, the fireproof mud will harden and fall off, thus endangering the safe operation of the equipment. In addition, the plugging mud has a short life cycle and needs to be frequently replaced, resulting in great inconvenience in production and maintenance. Based on this, the present invention provides a cable hole plugging device for a distribution box to solve the above problems. Summary of the Invention:

[0004] The purpose of the present invention is to provide a cable hole plugging device for a distribution box in view of the deficiencies of the prior art. A rotating blade that can fit any circular hole shape is designed, and the conversion of the linear motion of the power source to the rotational motion of the blade can be achieved through a cam-link mechanism, achieving the purpose of motion form conversion; rubber-coated fiberglass cloth is selected as the fireproof fabric, which meets the waterproof requirements of the device while ensuring insulation; by using an air pump push rod device as the power source, the locking of the mechanism at any push rod stroke is realized, solving the sealing and fitting problems between the cable and the plugging device; by using a double-layer plugging structure, the stability and reliability of the cable hole plugging in the distribution box are improved.

[0005] The present invention adopts the following technical solutions:

[0006] A cable hole plugging device for a distribution box, comprising a driving device, a first plugging layer, a second plugging layer and an auxiliary fixing device; the first plugging layer includes a first rotating ring, a plurality of first blades and a first connecting rod; the second plugging layer includes a second rotating ring, a plurality of second blades and a second connecting rod; the auxiliary fixing device includes a connecting ring, and the connecting ring includes a first connecting ring and a second connecting ring; the first connecting ring, the first blades, the second connecting ring and the second blades are stacked in sequence; a plurality of hinge points are arranged on the first rotating ring along the circumferential direction, hinged with the first connecting rod, the first connecting rod is hinged with the first blade, the first blades are distributed between the first connecting ring and the second connecting ring, and are hinged with the first connecting ring and the second connecting ring at the same point, and a plurality of first blades can be spliced into a circular structure; a plurality of hinge points are arranged on the second rotating ring along the circumferential direction, hinged with the second connecting rod, the second connecting rod is hinged with the second blade; the second blade is hinged with the second connecting ring, and a plurality of second blades can be spliced into a circular structure; the driving device drives the first rotating ring to rotate clockwise / counterclockwise, drives the first connecting rod to move, and then drives the first blade to rotate; the driving device drives the second rotating ring to rotate counterclockwise / clockwise, drives the second connecting rod to move, and then drives the second blade to rotate, and the plugging hole sizes of the first plugging layer and the second plugging layer are adjusted by rotating the first blade and the second blade respectively, so as to adjust the size of the cable hole, and the plugging effect of cables with different sizes is realized.

[0007] Further, the driving device includes an air pump, a push rod, a second connecting ring, a first connecting ring, a first connecting rod, a second connecting rod and a receiving cam; the first connecting ring is fixedly connected with the first rotating ring, and the second connecting ring is fixedly connected with the second rotating ring; the push rod of the air pump is drivingly connected with the second connecting ring, both ends of the second connecting rod are hinged with the receiving cam and the second connecting ring respectively, and both ends of the first connecting rod are hinged with the receiving cam and the first connecting ring respectively; the push rod of the air pump drives the second connecting ring to move, drives the second rotating ring to rotate, and then drives the second connecting rod to move, thereby driving the receiving cam to rotate, and the receiving cam drives the first connecting rod to move, and finally drives the first connecting ring and the first rotating ring to rotate.

[0008] Further, the length of the first connecting rod is less than that of the second connecting rod. Under the same stroke of the push rod, the movement speed of the second rotating ring is less than that of the first rotating ring; the second blade is closer to the center of the device than the first blade.

[0009] Further, the receiving cam includes a circular cam, a first connecting member and a second connecting member, and the first connecting member and the second connecting member are respectively fixed at the edge of the circular cam; the second connecting rod is hinged with the second connecting member, and the first connecting rod is hinged with the first connecting member.

[0010] Further, a number of hinge points are provided on the first connecting member, and the first connecting rod is hinged to the hinge points at different positions to adjust the rotation speed of the first rotating ring.

[0011] Further, the first connecting rod has a linear structure, and the second connecting rod has an "L" - shaped structure.

[0012] Further, the auxiliary fixing device further includes a number of fixing rollers, which are arranged at the edges of the first rotating ring and the second rotating ring. The fixing rollers are provided with chutes adapted to the first rotating ring and the second rotating ring, and are slidably connected to the first rotating ring and the second rotating ring.

[0013] Further, the first rotating ring and the second rotating ring rotate in opposite directions.

[0014] Further, the centers of the first connecting ring, the second connecting ring, the first rotating ring, and the second rotating ring coincide; the first connecting ring and the second connecting ring have the same radius, which is R1, and the first rotating ring and the second rotating ring have the same radius, which is R2, and R2 > R1.

[0015] Further, the first blade and the second blade rotate around their respective hinge points as the centers, showing a spiral shape gradually approaching a circle. The more the number of blades, the closer the shape of the formed hole is to a circle. Considering the structural complexity and stability, without affecting the accuracy, the number of the first blade and the second blade in the present invention is five.

[0016] Further, to ensure the simultaneity of the movement of the first blade and the second blade, the first connecting ring, the first blade, the second connecting ring, and the second blade are all opened with holes along the same axis; the hinge points of the second blade and the second connecting ring, and the hinge points of the first blade and the first connecting ring and the second connecting ring are all located on the axis; a pin clearance connection is adopted between the second blade and the second connecting ring, and between the first blade and the first connecting ring and the second connecting ring; the inner edges of the first blade and the second blade are simultaneously in close contact with the cable.

[0017] Further, the first connecting ring and the second connecting ring are coated with fire - resistant fabric, and the tips of the first blade and the second blade are both connected to the fire - resistant fabric. When the first blade and the second blade rotate, they can drive the fire - resistant fabric to move; the fire - resistant fabric is selected as silicone - rubber - coated fiberglass cloth.

[0018] Further, in this device, the air pump, the first connecting ring, and the second connecting ring are fixed structures, and the circular cam, the fixing rollers, the first rotating ring, and the second rotating ring can only perform rotational motion around their geometric centers in the same plane.

[0019] The beneficial effects of the present invention:

[0020] A cable hole plugging device for a distribution box according to the present invention can obtain a cable hole plugging device for a distribution box that can be adjusted according to the cable size and can keep the plugging part in a sealed state for a long time through the cooperation of an active plugging layer, a driven plugging layer and a cam-link mechanism. Compared with the existing cable hole plugging devices for distribution boxes, its significant advantages are as follows:

[0021] (1) Compared with the traditional plugging device, since the plugging hole of the device of the present invention is adjustable, the applicability of the plugging device is improved and the plugging cost is reduced;

[0022] (2) The present invention uses an air pump as the power source, can apply a greater pressure to the plugging contact point, and can effectively meet the requirement of the tightness of the cable hole plugging;

[0023] (3) The plugging device of the present invention is more convenient to use and more miniaturized, is convenient to carry for outdoor operations, and can effectively improve the plugging efficiency of the cable holes of the distribution box. Description of the drawings:

[0024] Figure 1 is the principle block diagram of the present invention;

[0025] Figure 2 is the three-dimensional structure schematic diagram of the present invention;

[0026] Figure 3 is the cross-sectional view of the present invention;

[0027] Figure 4 is the rear view of the present invention;

[0028] Figure 5 is the front view of the present invention;

[0029] Figure 6 and Figure 7 is the working state diagram of the present invention;

[0030] The marks in the drawings are:

[0031] 1, air pump; 2, push rod; 3, second connection ring; 4, first connection ring; 5, first connecting rod; 6, second connecting rod; 7, receiving cam; 71, circular cam; 72, first connecting piece; 73, second connecting piece; 8, connecting ring; 81, first connecting ring; 82, second connecting ring; 9, first link; 10, first blade; 11, second blade; 12, second link; 13, fixed roller; 14, first swivel ring; 15, second swivel ring. Specific embodiments:

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] Referring to Figures 1 to 7 , this embodiment provides a cable hole plugging device for a distribution box, including a driving device, a first plugging layer, a second plugging layer, and an auxiliary fixing device; the first plugging layer includes a first rotating ring 14, a plurality of first blades 10, and a first connecting rod 9; the second plugging layer includes a second rotating ring 15, a plurality of second blades 11, and a second connecting rod 12; the first connecting rod 9 is a linear structure, and the second connecting rod 12 is an "L" - shaped structure; the auxiliary fixing device includes a connecting ring 8, and the connecting ring 8 includes a first connecting ring 81 and a second connecting ring 82; the first connecting ring 81, the first blades 10, the second connecting ring 82, and the second blades 11 are stacked in sequence.

[0035] Specifically, in this embodiment, five hinge points are evenly arranged along the circumferential direction on the first rotating ring 14, which are hinged to the first connecting rod 9. The first connecting rod 9 is hinged (spiral pair connection) to the first blades 10. The first blades 10 are distributed between the first connecting ring 81 and the second connecting ring 82 and are hinged (spiral pair connection) to the first connecting ring 81 and the second connecting ring 82 at the same point. A plurality of first blades 10 can be spliced into a circular structure; five hinge points are evenly arranged along the circumferential direction on the second rotating ring 15, which are hinged to the second connecting rod 12. The second connecting rod 12 is hinged (spiral pair connection) to the second blades 11; the second blades 11 are hinged (spiral pair connection) to the second connecting ring 82, and a plurality of second blades 11 can be spliced into a circular structure.

[0036] Among them, the centers of the first connecting ring 81, the second connecting ring 82, the first rotating ring 14, and the second rotating ring 15 coincide; the radii of the first connecting ring 81 and the second connecting ring 82 are the same, which is R1, and the radii of the first rotating ring 14 and the second rotating ring 15 are the same, which is R2, and R2 > R1.

[0037] In this embodiment, the first blade 10 and the second blade 11 rotate respectively around their corresponding hinge points in a spiral shape and gradually approach a circular shape. The more blades there are, the closer the shape of the formed hole is to a circle. Considering the structural complexity and stability, without affecting the accuracy, the number of the first blade 10 and the second blade 11 provided in the present invention is five (the five equal parts of a circle). In addition, to ensure the simultaneity of the movement of the first blade 10 and the second blade 11, the first connecting ring 81, the first blade 10, the second connecting ring 82, and the second blade 11 are all provided with holes on the same axis; the hinge points between the second blade 11 and the second connecting ring 82, and between the first blade 10 and the first connecting ring 81 and the second connecting ring 82 are all located on the axis; a pin clearance connection is adopted between the second blade 11 and the second connecting ring 82, and between the first blade 10 and the first connecting ring 81 and the second connecting ring 82, which protects the rotating blades while enhancing the movement stability of the rotating blades and bears most of the locking pressure for the rotating blades; the inner edges of the first blade 10 and the second blade 11 are simultaneously in close contact with the cable.

[0038] In this embodiment, the auxiliary fixing device further includes four groups of fixing rollers 13, which are evenly arranged at the edges of the first rotating ring 14 and the second rotating ring 15. The fixing rollers 13 are provided with chutes adapted to the first rotating ring 14 and the second rotating ring 15, and are slidably connected or rotatably connected to the first rotating ring 14 and the second rotating ring 15, making the movement more stable and less likely to vibrate, and playing the role of stabilizing the device and protecting the first rotating ring 14 and the second rotating ring 15. By adding lubricating oil to the gap between the rollers 13 and the first rotating ring 14 and the second rotating ring 15, the rolling pair diffuses the lubricating oil to the sealing layer, playing the functions of waterproofing and anti-oxidation, and can greatly extend the service life of the plugging device.

[0039] During application, the first rotating ring 14 and the second rotating ring 15 rotate in opposite directions. Specifically, the driving device drives the first rotating ring 14 to rotate clockwise / counterclockwise, drives the first connecting rod 9 to move, and then drives the first blade 10 to rotate; the driving device drives the second rotating ring 15 to rotate counterclockwise / clockwise, drives the second connecting rod 12 to move, and then drives the second blade 11 to rotate. By rotating the first blade 10 and the second blade 11, two cable installation holes that move simultaneously and have adjustable sizes can be obtained at the center of the device, and the plugging effect for cables of different sizes can be achieved.

[0040] Embodiment 2

[0041] The structure of this embodiment is substantially the same as that of Embodiment 1, except that the specific structure of the driving device is defined in this embodiment.

[0042] In this embodiment, the driving device includes an air pump 1, a push rod 2, a second connecting ring 3, a first connecting ring 4, a first connecting rod 5, a second connecting rod 6, and a receiving cam 7; the first connecting ring 4 is fixedly connected to the first rotating ring 14, and the second connecting ring 3 is fixedly connected to the second rotating ring 15; the push rod 2 of the air pump 1 is drivingly connected to the second connecting ring 3, both ends of the second connecting rod 6 are hinged to the receiving cam 7 and the second connecting ring 3 respectively, and both ends of the first connecting rod 5 are hinged to the receiving cam 7 and the first connecting ring 4 respectively; the push rod 2 of the air pump 1 drives the second connecting ring 3 to move, drives the second rotating ring 15 to rotate, further drives the second connecting rod 6 to move, thereby drives the receiving cam 7 to rotate, the receiving cam 7 drives the first connecting rod 5 to move, and finally drives the first connecting ring 4 and the first rotating ring 14 to rotate.

[0043] That is to say, in this embodiment, the second rotating ring 15 is the driving ring, which is mainly responsible for bearing the power of the air pump push rod and realizing the conversion from linear motion to rotational motion. The first rotating ring 14 is the driven ring, which rotates synchronously under the drive of the second rotating ring 15. The connection between the second rotating ring 15 and the first rotating ring 14 is realized by the first connecting rod 5, the second connecting rod 6, and the receiving cam 7. During application, the driving ring (the second rotating ring 15) drives several groups of second blades 11 to rotate simultaneously, which is responsible for approaching the shape of the cable hole in the active plugging layer of the distribution box hole, and realizes the plugging of the active layer; the driven ring (the first rotating ring 14) is responsible for bearing the rotational torque transmitted by the driving ring through the cam-link mechanism, realizes the simultaneous actuation of the rotating blades in the active layer and the driven layer, and the driven ring drives several groups of first blades 10 to rotate simultaneously, which is responsible for approaching the shape of the cable hole in the driven plugging layer of the distribution box hole, and realizes the plugging of the driven layer.

[0044] The locking and holding of this structure are mainly realized by the air pump 1. After the mechanism reaches the position, it can be held at the fixed stop position, effectively maintaining the pressure of the overall mechanical structure on the cable; the push rod 2 is piston-connected to the air pump 1. As the stroke of the push rod 1 changes, the size of the cable installation hole can be adjusted.

[0045] In this embodiment, the length of the first connecting rod 5 is less than that of the second connecting rod 6. When the push rod 2 moves the same stroke, the movement speed of the second rotating ring 15 is less than that of the first rotating ring 14; the second blade 11 is closer to the center of the device than the first blade 10.

[0046] In this embodiment, the receiving cam 7 includes a circular cam 71, a first connecting member 72, and a second connecting member 73. The first connecting member 72 and the second connecting member 73 are respectively fixed at the edge of the circular cam 71; the second connecting rod 6 is hinged to the second connecting member 73, and the first connecting rod 5 is hinged to the first connecting member 72. Four hinge points are provided on the first connecting member 72 to hinge the first connecting rod 5 at different hinge points to adjust the rotation speed of the first rotating ring 14.

[0047] Embodiment 3

[0048] The structure of this embodiment is substantially the same as that of Embodiment 2, except that: a fireproof fabric is also provided in the structure of this embodiment.

[0049] Specifically, the first connecting ring 81 and the second connecting ring 82 are coated with a fireproof fabric, and the tips of the first blade 10 and the second blade 11 are both connected to the fireproof fabric. When the first blade 10 and the second blade 11 rotate, they can drive the fireproof fabric to move; the fireproof fabric is selected as a silicone rubber-coated fiberglass cloth, which is made by calendering or impregnating a high-temperature-resistant, anti-corrosive, and high-strength fiberglass cloth with silicone rubber. It can withstand temperatures between -70°C and 230°C, has high insulation, is resistant to ozone, oxygen, light, and weather aging, has excellent weather resistance for outdoor use, and has a service life of up to ten years. The gap between the fireproof fabric on the outside of the first blade 10 and the second blade 11 and the cable is eliminated by pressure, so as to prevent external air and liquid from entering.

[0050] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should be regarded as within the protection scope of the present invention.

Claims

1. A cable hole plugging device for a distribution box, characterized in that it includes a driving device, a first plugging layer, a second plugging layer and an auxiliary fixing device; The first plugging layer includes a first rotating ring (14), a plurality of first blades (10) and a first connecting rod (9); the second plugging layer includes a second rotating ring (15), a plurality of second blades (11) and a second connecting rod (12); the auxiliary fixing device includes a connecting ring (8), and the connecting ring (8) includes a first connecting ring (81) and a second connecting ring (82); the first connecting ring (81), the first blades (10), the second connecting ring (82), and the second blades (11) are stacked in sequence; A plurality of hinge points are arranged on the first rotating ring (14) along the circumferential direction, which are hinged to the first connecting rod (9), the first connecting rod (9) is hinged to the first blade (10), the first blades (10) are distributed between the first connecting ring (81) and the second connecting ring (82), and are hinged to the first connecting ring (81) and the second connecting ring (82) at the same point, and a plurality of first blades (10) can be spliced into a circular structure; A plurality of hinge points are arranged on the second rotating ring (15) along the circumferential direction, which are hinged to the second connecting rod (12), the second connecting rod (12) is hinged to the second blade (11); the second blade (11) is hinged to the second connecting ring (82), and a plurality of second blades (11) can be spliced into a circular structure; The driving device drives the first rotating ring (14) to rotate clockwise / counterclockwise, drives the first connecting rod (9) to move, and further drives the first blade (10) to rotate; the driving device drives the second rotating ring (15) to rotate counterclockwise / clockwise, drives the second connecting rod (12) to move, and further drives the second blade (11) to rotate. By rotating the first blade (10) and the second blade (11), the sizes of the holes plugged by the first plugging layer and the second plugging layer are respectively adjusted, and further the size of the cable hole is adjusted to achieve the plugging effect for cables of different sizes.

2. The cable hole plugging device for a distribution box according to claim 1, characterized in that the driving device includes an air pump (1), a push rod (2), a second connecting ring (3), a first connecting ring (4), a first connecting rod (5), a second connecting rod (6) and a receiving cam (7); the first connecting ring (4) is fixedly connected to the first rotating ring (14), and the second connecting ring (3) is fixedly connected to the second rotating ring (15); The push rod (2) of the air pump (1) is drivingly connected to the second connecting ring (3), both ends of the second connecting rod (6) are respectively hinged to the receiving cam (7) and the second connecting ring (3), and both ends of the first connecting rod (5) are respectively hinged to the receiving cam (7) and the first connecting ring (4); The push rod (2) of the air pump (1) drives the second connecting ring (3) to move, drives the second rotating ring (15) to rotate, and further drives the second connecting rod (6) to move, thereby driving the receiving cam (7) to rotate. The receiving cam (7) drives the first connecting rod (5) to move, and finally drives the first connecting ring (4) and the first rotating ring (14) to rotate.

3. The cable hole plugging device for a distribution box according to claim 2, characterized in that The length of the first connecting rod (5) is less than that of the second connecting rod (6). When the push rod (2) moves the same stroke, the movement speed of the second swivel (15) is less than that of the first swivel (14). The second blade (11) is closer to the center of the device relative to the first blade (10).

4. The power distribution box cable hole plugging device according to claim 2, characterized in that The receiving cam (7) includes a circular cam (71), a first connecting member (72) and a second connecting member (73). The first connecting member (72) and the second connecting member (73) are respectively fixed at the edge of the circular cam (71); The second connecting rod (6) is hinged to the second connecting member (73), and the first connecting rod (5) is hinged to the first connecting member (72).

5. The power distribution box cable hole plugging device according to claim 4, characterized in that A number of hinge points are provided on the first connecting member (72) to hinge the first connecting rod (5) at different hinge points to adjust the rotation speed of the first swivel (14).

6. The power distribution box cable hole plugging device according to claim 1, characterized in that The first connecting rod (9) is of a linear structure, and the second connecting rod (12) is of an "L" - shaped structure.

7. The power distribution box cable hole plugging device according to claim 1, characterized in that The auxiliary fixing device further includes a number of fixing rollers (13). The fixing rollers (13) are arranged at the edges of the first swivel (14) and the second swivel (15). The fixing rollers (13) are provided with chutes adapted to the first swivel (14) and the second swivel (15), and are slidably connected to the first swivel (14) and the second swivel (15).

8. The power distribution box cable hole plugging device according to claim 1, characterized in that The first swivel (14) and the second swivel (15) rotate in opposite directions.

9. The power distribution box cable hole plugging device according to claim 1, characterized in that The centers of the first connecting ring (81), the second connecting ring (82), the first swivel (14) and the second swivel (15) coincide; The first connecting ring (81) and the second connecting ring (82) have the same radius, which is R1, and the first swivel (14) and the second swivel (15) have the same radius, which is R2, and R2 > R1.

10. The power distribution box cable hole plugging device according to claim 1, characterized in that The first connecting ring (81) and the second connecting ring (82) are coated with fire - proof fabric. The tips of the first blade (10) and the second blade (11) are both connected to the fire - proof fabric. When the first blade (10) and the second blade (11) rotate, they can drive the fire - proof fabric to move; The fire - proof fabric is selected as silicone rubber coated fiberglass cloth.

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