Cable bridge for test site

Abstract

The invention discloses a cable bridge for a testing site, and particularly relates to the field of radio testing. Comprising a plurality of U-shaped fixing frameworks, and the bottom of each fixing framework is supported by a vertical rod; the first flexible rope sequentially penetrates through one side wall of each fixing framework; the second flexible rope sequentially penetrates through the other side walls of all the fixed frameworks; a plurality of U-shaped first trunking frameworks are distributed between two adjacent fixed frameworks, and two side walls of each first trunking framework are respectively connected with a first flexible rope and a second flexible rope; wherein the plurality of fixed skeletons and the plurality of first wire duct skeletons form a cable supporting groove along the extension direction of the cable. The cable supporting groove enables the cable to be placed in the cable supporting groove in the cable arrangement direction and not to fall to the ground. The accumulation of outdoor rain, snow and field sundries in the wire duct is avoided, so that the maintenance difficulty is reduced; in addition, only the fixed framework needs to be provided with the vertical rods for supporting, so that the use amount of plates for processing conventional cable bearing grooves and the number of the vertical rods are reduced, and the cost of materials, processing, installation and the like is saved.

Description

Technical Field

[0001] This application relates to the field of radio testing, and particularly to a cable tray for a test site. Background Art

[0002] In application scenarios such as radio testing and microwave far-field testing, it is often necessary to detect the radiation characteristics of a DUT (Device Under Test) at various angles in space. Some DUTs are not convenient to be installed on a test turntable. When using the turntable to rotate the DUT, it is only possible to consider fixing the radiator and making the test equipment move in a circular motion within the corresponding angles of the test range with the radiation source as the center and a certain distance as the radius to measure physical quantities such as electromagnetic radiation. Generally, the test equipment is installed on a test vehicle that operates under control. The collected test data needs to be transmitted to the control center of the test site, and the operating parameter data of the test vehicle also needs to be controlled by the control center. For some DUTs, due to specific requirements such as anti-interference and confidentiality, a wired transmission must be used between the test vehicle and the control center, and the cables cannot touch the ground.

[0003] In a relatively small test site, the conventional method is to erect a steel structure arc-shaped overhead cable trough along the outer side of the test arc. The cable trough is generally formed by bending metal or non-metal plates into a trough shape with an open upper end and is spliced into a complete cable trough frame in sections. However, in a large test site, using the above conventional method will bring many disadvantages such as high cost and difficult maintenance. Summary of the Invention

[0004] The main purpose of this application is to provide a cable tray for a test site, aiming to solve the problems of high cost and difficult maintenance existing in the existing overhead cable troughs.

[0005] To achieve the above purpose, this application provides a cable tray for a test site, including: a plurality of U-shaped fixed skeletons arranged in parallel and at intervals in sequence, a first flexible rope, a second flexible rope, and a plurality of U-shaped first cable trough skeletons. The bottom of each fixed skeleton is supported by a vertical rod; the first flexible rope passes through one side wall of all the fixed skeletons in sequence; the second flexible rope passes through the other side wall of all the fixed skeletons in sequence; a plurality of U-shaped first cable trough skeletons are distributed between two adjacent fixed skeletons, and the two side walls of each first cable trough skeleton are respectively connected to the first flexible rope and the second flexible rope; wherein, the plurality of fixed skeletons and the plurality of first cable trough skeletons form a cable support trough along the cable extension direction.

[0006] Optionally, it further includes a second cable trough skeleton; there are a plurality of first cable trough skeletons between two adjacent fixed skeletons, and the second cable trough skeletons are distributed at intervals among the plurality of first cable trough skeletons; wherein, the width of the bottom end of the second cable trough skeleton is smaller than the width of the bottom end of the first cable trough skeleton.

[0007] Optionally, the second wire groove skeleton is located between the first wire groove skeleton and the fixed skeleton, and the width of the bottom end of the second wire groove skeleton is smaller than the width of the bottom end of the fixed skeleton.

[0008] Optionally, the first wire groove skeleton and the second wire groove skeleton have the same material and shape; the first wire groove skeleton is wound by a semi-rigid material, and during the winding process, rope passing holes are reserved at both ends of the side wall of the first wire groove skeleton.

[0009] Optionally, there are two first flexible ropes, and both of the two first flexible ropes sequentially pass through the fixed skeleton and one side wall of the first wire groove skeleton; there are two second flexible ropes, and both of the two second flexible ropes sequentially pass through the fixed skeleton and the other side wall of the first wire groove skeleton.

[0010] Optionally, the width of the open end of the fixed skeleton is greater than the bottom width, and the width of the open end of the first wire groove skeleton is greater than the bottom width.

[0011] Optionally, it further includes a wire guiding arm, and the outlet of the wire guiding arm is located above the fixed skeleton for guiding the cable.

[0012] Optionally, the wire guiding arm includes: a support rod; a wire pipe supporting plate fixed on the top of the support rod; a wire pipe fixed on the wire pipe supporting plate, with one end located above the cable outlet of the cable winding and unwinding device and the other end located above the cable tray for guiding the cable.

[0013] Optionally, the wire guiding arm further includes: guiding rings connected to both ends of the wire pipe.

[0014] Optionally, the wire pipe is fixed on the wire pipe supporting plate by a hoop.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: The cable tray in the test site of the present invention, compared with the cable trough formed by bending metal or non-metal plates into a trough shape with an open upper end and spliced in sections, in this application, vertical rods are used to support and fix the fixed skeleton, and then the second flexible rope and the first flexible rope are fixed through the fixed skeleton. Multiple first wire trough skeletons are connected by the first flexible rope and the second flexible rope, and cables are horizontally supported between the vertical rods, so that the cables are placed along the cable laying direction into the cable supporting trough without touching the ground; it avoids the accumulation of outdoor rain, snow and field debris in the wire trough, thereby reducing the difficulty of maintenance; and only the fixed skeleton needs to be provided with vertical rod supports, reducing the usage amount of sheet materials for processing conventional cable supporting troughs and the number of vertical rods, saving costs such as materials, processing and installation; in the summer sun exposure environment, the contact area between the bottom of the flexible cable trough and the cable is extremely small, and the ventilation is good, avoiding the high temperature of the large-area bottom plate of the conventional cable trough formed by bending plates from roasting the cables placed on it and shortening the cable life; a wire guiding arm is provided to guide the cables from the outlet of the cable winding and unwinding equipment to the cable supporting trough, further ensuring that the cables accurately enter the cable tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a cable tray in a test site of the present application; Figure 2 It is a schematic structural diagram of the fixed skeleton in a cable tray in a test site of the present application; Figure 3 It is a diagram of the position change of the first wire trough skeleton in a cable tray in a test site of the present application; Figure 4 It is another schematic structural diagram of a cable tray in a test site of the present application; Figure 5 It is a schematic structural diagram of the first wire trough skeleton in a cable tray in a test site of the present application; Figure 6 It is a schematic structural diagram of the second wire trough skeleton in a cable tray in a test site of the present application; Figure 7 It is a working scenario diagram of a cable tray in a test site of the present application; Figure 8 It is a schematic diagram of two arc trajectories in a cable tray in a test site of the present application; Figure 9 It is a schematic structural diagram of the wire guiding arm in a cable tray in a test site of the present application.

[0017] The realization of the purpose, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions and advantages of this application more clear, the following will describe the technical solutions in this application clearly and completely in combination with the accompanying drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0019] The first embodiment of the present invention provides a cable tray for a test site, as Figure 1-2 shown, which includes a plurality of U-shaped fixed skeletons 1, a plurality of U-shaped first wire groove skeletons 2, a first flexible rope 3 and a second flexible rope 4. Among them, the bottom of each fixed skeleton 1 is supported by a vertical rod 6; a U-shaped first wire groove skeleton 2 is arranged between two adjacent fixed skeletons 1, and a plurality of fixed skeletons 1 and a plurality of first wire groove skeletons 2 form a cable supporting groove along the cable extension direction; the first flexible rope 3 sequentially passes through one side wall of all the fixed skeletons 1 and the first wire groove skeletons 2; the second flexible rope 4 is parallel to the first flexible rope 3 and sequentially passes through the other side wall of all the fixed skeletons 1 and the first wire groove skeletons 2.

[0020] In an exemplary embodiment, the fixed skeleton 1 is formed by welding channel steel profiles and serves as the layout node of the steel wire rope wire groove. The width of the open end of the fixed skeleton 1 is greater than the width of the bottom, and the width of the open end of the first wire groove skeleton 2 is greater than the width of the bottom, which is convenient for supporting cables.

[0021] In this embodiment, compared with the cable trough formed by bending metal or non-metal plates into a trough shape with an open upper end and splicing them in sections, in this application, the fixed skeleton 1 is supported by the vertical rod 6, and then the second flexible rope 4 and the first flexible rope 3 are fixed through the fixed skeleton 1. The first flexible rope 3 and the second flexible rope 4 are used to connect a plurality of first wire groove skeletons 2 to horizontally support the cables between the vertical rods 6, so that the cables are placed in the cable supporting groove along the wiring direction without touching the ground; it avoids the accumulation of outdoor rain, snow and field debris, thereby reducing the difficulty of maintenance; and only the fixed skeleton 1 needs to be supported by the vertical rod 6, reducing the area of the cable supporting groove and the number of vertical rods 6, saving a large amount of material, processing and installation costs.

[0022] Furthermore, if the first wire groove skeleton 2 slides and displaces along the steel wire rope, forming the state as Figure 3 shown, resulting in too large a distance between the two wire groove skeletons, the cable will fall from the gap between the two enlarged wire groove skeletons and cannot be correctly placed in the wire groove. To solve this problem, each first wire groove skeleton 2 needs to be fixed in its designed position. However, if each first wire groove skeleton 2 is bundled and fixed with four flexible ropes, the workload of the entire wire groove construction will be very large and the cost will increase. Therefore, the second wire groove skeleton 5 is provided in this embodiment, specifically as follows.

[0023] As shown Figure 4 in the figure, it further includes a second wire groove skeleton 5. There are multiple first wire groove skeletons 2 between two adjacent fixed skeletons 1. The second wire groove skeletons 5 are distributed at intervals among the multiple first wire groove skeletons 2. Among them, the width of the open end of the second wire groove skeleton 5 is equal to the width of the open ends of the first wire groove skeleton 2 and the fixed skeleton 1, and the width of the bottom end of the second wire groove skeleton 5 is smaller than the width of the bottom end of the first wire groove skeleton 2. The second wire groove skeleton 5 is located between the first wire groove skeleton 2 and the fixed skeleton 1, and the width of the bottom end of the second wire groove skeleton 5 is smaller than the width of the bottom end of the fixed skeleton 1.

[0024] In this embodiment, the second wire groove skeleton 5 is smaller than the bottom widths of the first wire groove skeleton 2 and the fixed skeleton 1. Both sides of the bottom of each of the first wire groove skeleton 2 and the fixed skeleton 1 are restricted by the first flexible rope 3 and the second flexible rope 4 and cannot slide left and right, solving the problem of restricting their sliding and shifting along the first flexible rope 3 and the second flexible rope 4. At the same time, the upper opening size remains unchanged, and it does not affect the smooth placement of the first flexible rope 3 and the second flexible rope 4.

[0025] It should be noted that the number of the first wire groove skeletons 2 and the second wire groove skeletons 5 between two adjacent fixed skeletons 1 is not limited to one and can be adjusted according to the actual situation. The spacing between the fixed skeleton 1 and the first wire groove skeleton 2 and between two first wire groove skeletons 2 can be set according to actual needs. Specifically, considering the flexibility of the supported cables, if the cables are relatively rigid and have a large bending radius, the spacing of the wire groove skeletons can be enlarged; otherwise, it can be reduced. In this example, the vertical pole 6 is installed by the on-site assembly method using expansion bolts. When installing the vertical pole 6, it is ensured that it is plumb to the ground. Then, the fixed skeleton 1 at the top of the vertical pole 6 is assembled. The first flexible rope 3 and the second flexible rope 4 are respectively passed through the two side walls of the fixed skeleton 1. A total of 50 wire groove wire rope skeletons (25 first flexible ropes 3 and 25 second wire groove skeletons 5) are alternately inserted between every two vertical poles 6 and are evenly distributed at an interval of 0.5 m. In addition, a rope passing hole for passing through the first flexible rope 3 and the second flexible rope 4 is opened in the fixed skeleton 1 to facilitate the connection of the first flexible rope 3 and the second flexible rope 4.

[0026] As shown Figure 5-6 in the figure, the first wire groove skeleton 2 and the second wire groove skeleton 5 are made of the same material and have the same shape; the first wire groove skeleton 2 is wound by a semi-rigid material. During the winding process, rope passing holes are reserved at both ends of the side wall of the first wire groove skeleton 2.

[0027] It can be understood that the semi-rigid material is a rigid bendable material, such as a single thick steel wire. In this embodiment, the semi-rigid material is used to wind the first wire trough skeleton 2 and the second wire trough skeleton 5, which not only plays a role in supporting the cables, but also reduces the weight, thereby preventing the first wire trough skeleton 2 and the second wire trough skeleton 5 from being too heavy and causing the wire trough between the two columns to sag excessively.

[0028] Further, in order to ensure stability, the first flexible rope 3 may include two, and the two first flexible ropes 3 are both connected to the side walls of the fixed frame 1 and the first wire trough frame 2; the second flexible rope 4 includes two, and the two second flexible ropes 4 are both connected to the side walls of the fixed frame 1 and the first wire trough frame 2. Specifically, the first flexible rope 3 and the second flexible rope 4 connected above the fixed frame 1 are parallel, and the first flexible rope 3 and the second flexible rope 4 connected below the fixed frame 1 are symmetrically arranged.

[0029] Exemplarily, the first flexible rope 3 and the second flexible rope 4 can be stainless steel wire ropes. The fixed frame 1 is provided with wire rope threading holes. The four threading holes on the fixed frame 1 are used to pass stainless steel wire ropes with an outer diameter of 3 mm.

[0030] The cable tray of the present invention is described below with a specific example. The following example is designed based on a test distance of 260m and an angle of 100 degrees.

[0031] like Figure 7 As shown, the source under test is located at the origin O, and arc R1 (radius 260m) is the arc of the running track of the sensor head of the test equipment on the test vehicle; with the origin O as the center, the arc (arc R2) with a radius of 260m and an equidistant distance of 2.5m outward and an angle of 100° with the origin is the arc where the test cable tray installation point is located, and the running track of the test vehicle is on the arc between R1 and R2. The cable tray upright 6 is installed on the cable laying track R2, and the length of this part of the arc is 458.1m. Note: The 2.5m here is based on the preliminary determination that the width of the test vehicle is not greater than 2m. If the width of the test vehicle changes, this value and the dimensions related to this value need to be readjusted.

[0032] Based on meeting functional requirements, simple construction and cost control considerations, the vertical pole setting is designed with an angle of 5° between the two vertical poles 6 and the center of the arc (straight-line spacing 22.9m).

[0033] The test vehicle travels along the arc between arcs R1 and R2, and the conductor arm outlet of the test vehicle travels along arc R2, but the cable tray steel wire rope duct runs along a straight line between the two cable tray poles 6, so the straight line between the two poles 6 does not overlap with the arc trajectory. Figure 8As shown, the point with the maximum deviation between the two trajectories is located at point H in the middle of the two vertical rods 6, and the maximum deviation between the two trajectories is 0.25 meters. To accommodate this trajectory deviation, the opening sizes of the fixed skeleton 1 and the first wire groove skeleton 2 (wire groove) need to be appropriately enlarged to ensure that the cable can always be reliably placed into the upper opening of the wire groove. Given that the above deviation is always unidirectional towards the inner side of the arc, theoretically, the opening size of the wire groove only needs to be larger than the above deviation size. Considering other installation errors and other factors, the upper opening size of the wire groove is enlarged to 0.38 meters, which can ensure that when the test vehicle travels along the arc, the cable at the cable outlet of the wire guiding arm can always be reliably placed into the upper opening of the wire groove.

[0034] Figure 7 For the entire test trajectory section shown, 21 vertical rods 6 need to be installed, two types of wire rope groove skeletons (500 each, a total of 1000) need to be installed (the installation spacing is calculated at 0.5 meters), and approximately 1850 meters of wire rope.

[0035] Furthermore, in actual use, the cable tray of the present invention is used in conjunction with the cable winding and unwinding device on the top of the test vehicle. The height of the cable outlet of the cable winding and unwinding device from the ground is approximately 2.2 meters, and the height of the cable groove opening of the cable tray from the ground is approximately 3 meters. To facilitate the cable to go from the outlet of the cable winding and unwinding device to the cable groove of the cable tray, a wire guiding arm is provided to guide the cable above the opening of the cable groove of the cable tray. The specific structure of the wire guiding arm is as follows.

[0036] It further includes a wire guiding arm, and the outlet of the wire guiding arm is located above the fixed skeleton 1 for guiding the cable. Specifically, as Figure 9 shown, the wire guiding arm includes a support rod 7, a wire pipe support plate 8, and a wire pipe 9; the wire pipe support plate 8 is fixed to the top of the support rod 7; the wire pipe 9 is fixed on the wire pipe support plate 8, one end is located above the cable outlet of the cable winding and unwinding device, and the other end is located above the cable tray for guiding the cable. The wire pipe 9 is fixed to the wire pipe support plate 8 through a hoop 10. The wire guiding arm further includes a guiding ring 11, and the guiding ring 11 is connected to both ends of the wire pipe 9.

[0037] During use, a cable winding and unwinding device is installed on the test vehicle, and the side of the cable winding and unwinding device close to the cable outlet faces the outer side of the arc of the test vehicle travel trajectory, that is, towards the cable tray. A wire guiding arm mounting seat 12 is installed at the center position of this side of the cable winding and unwinding device. The support rod 7 is installed in the wire guiding arm mounting seat 12 and can slide and lock vertically along the wire guiding arm mounting seat 12. The support rod 7 is a square steel pipe profile with an outer dimension of 60 and a wall thickness of 4, having sufficient structural rigidity. When installing the wire pipe 9, the left and right positions shown are adjustable, so that the distance between the cable outlet and the cable winding and unwinding device is adjustable, to ensure that after the device is installed, the cable can always accurately fall into the cable support groove along the wire guiding arm.

[0038] In this embodiment, the guiding ring 11 has an arc-shaped cross-section along the axis with a radius of 80 to ensure that the cable is not bent or damaged when guided through. At the connection end of the guiding ring 11 and the wire pipe 9, the inner side of the opening is rounded to ensure that the cable passes smoothly through the joint. During retraction, loosen the locking screw of the support rod 7 on the mounting base, and the support rod 7 slides down; loosen the hoop screw of the wire pipe 9 and slide the wire pipe 9 to the right. There is a certain distance between the guiding ring 11 and the cable supporting groove and the wire outlet of the cable winding and unwinding device respectively. It is deliberately designed to make the cable open in this interval without being restricted, so as to ensure that the yaw angle of the cable at the entrances of the two guiding rings 11 is as small as possible, that is, the bending angle of the cable at these two places can be as small as possible. Thus, the friction force of the cable passing through is reduced, the wire passing is smooth, and at the same time, the bending angle of the cable is reduced to protect the cable.

[0039] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A cable tray for a test site, characterized in that Including: A plurality of U-shaped fixed skeletons arranged in parallel and spaced in sequence, and the bottom of each fixed skeleton is supported by a vertical rod; A first flexible rope passing through one side wall of all the fixed skeletons in sequence; A second flexible rope passing through the other side wall of all the fixed skeletons in sequence; A plurality of U-shaped first wire groove skeletons distributed between two adjacent fixed skeletons, and two side walls of each first wire groove skeleton are respectively connected to the first flexible rope and the second flexible rope; Wherein, the plurality of fixed skeletons and the plurality of first wire groove skeletons form a cable support groove along the cable extension direction.

2. The cable tray of the test site according to claim 1, characterized in that, It further includes a second wire groove skeleton; there are a plurality of first wire groove skeletons between two adjacent fixed skeletons, and the second wire groove skeletons are spaced and distributed among the plurality of first wire groove skeletons; Wherein, the bottom end width of the second wire groove skeleton is smaller than the bottom end width of the first wire groove skeleton.

3. The cable tray of the test site according to claim 2, characterized in that, The second wire groove skeleton is located between the first wire groove skeleton and the fixed skeleton, and the bottom end width of the second wire groove skeleton is smaller than the bottom end width of the fixed skeleton.

4. The cable tray of the test site according to claim 2, characterized in that, The first wire groove skeleton and the second wire groove skeleton are of the same material and shape; The first wire groove skeleton is wound by a semi-rigid material, and during the winding process, rope passing holes are reserved at both ends of the side wall of the first wire groove skeleton.

5. The cable tray of the test site according to claim 2, wherein There are two first flexible ropes, and both of the two first flexible ropes pass through one side wall of the fixed skeleton and the first wire groove skeleton in sequence; There are two second flexible ropes, and both of the two second flexible ropes pass through the other side wall of the fixed skeleton and the first wire groove skeleton in sequence.

6. The cable tray of the test site according to claim 1, characterized in that The opening end width of the fixed skeleton is greater than the bottom width, and the opening end width of the first wire groove skeleton is greater than the bottom width.

7. The cable tray of the test site according to claim 1, wherein, It further includes a wire guiding arm, and the outlet of the wire guiding arm is located above the fixed skeleton for guiding the cable.

8. The cable tray of the test site according to claim 7, characterized in that, The wire guiding arm includes: A support rod; A wire pipe support plate fixed on the top of the support rod; A wire pipe fixed on the wire pipe support plate, with one end located above the cable outlet of the cable winding and unwinding device and the other end located above the cable tray for guiding the cable.

9. The cable tray of the test site according to claim 8, characterized in that, The wire guiding arm further includes: A guiding ring connected to both ends of the wire pipe.

10. The cable tray of the test site according to claim 8, characterized in that, The wire pipe is fixed on the wire pipe support plate by a hoop.

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