Wire antenna sling tensioning device

Abstract

The utility model discloses a wire antenna sling tensioning device, which comprises a pulley assembly arranged at the upper end part of an antenna support frame and an adjusting bracket assembly arranged at the lower end part of the antenna support frame, the pulley assembly comprises a single-linkage fixed pulley, a duplex fixed pulley and a multi-linkage pulley, the single-linkage fixed pulley is provided with a pulley groove, the duplex fixed pulley is provided with two pulley grooves, and the multi-linkage pulley is provided with a multi-linkage pulley. The A end of the multi-linkage pulley is provided with three pulley grooves, and the B end of the multi-linkage pulley is provided with one pulley groove. The sling tensioning device disclosed by the utility model has a self-adjusting function, and the sag of the antenna curtain is not obvious along with seasonal variation by enabling the cable net of the antenna curtain to keep constant tension, so that the consistency of an array antenna is improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical structure and shortwave communication, in particular to a wire antenna sling tensioning device in the field. Background Art

[0002] Shortwave communication systems have always played an important role in politics, military affairs, diplomacy, economy, security, etc., due to their low investment and strong anti-destruction capabilities. Even with the increasing development of satellite communications, ultra-shortwave communications, and optical fiber communications, shortwave communication still accounts for more than 30% of the means of obtaining intelligence in peacetime. Especially in wartime, shortwave communication is an indispensable means of timely and accurate intelligence, and still plays an important role in intelligence production.

[0003] The shortwave antenna structure must adapt to various environmental conditions, and its antenna support structure must meet the requirements of the antenna curtain's forming and stress. Especially when the environment and site size are limited, it is necessary to reduce the structural size and increase the force of the flexible cable to adjust the antenna structure. At the same time, it is also necessary to meet the requirements of various loads, such as the antenna support and antenna curtain, to have sufficient strength and rigidity to meet the requirements of wind and earthquake resistance. In addition, due to changes in temperature and wind force, the antenna curtain will expand and contract with changes in temperature, and change its stress with changes in wind force, which affects the forming sag and stress of the antenna curtain. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a labor-saving wire antenna suspension cable tensioning device, which has a self-adjusting function so that the sag of the antenna curtain does not change significantly with the seasons, and reduces the force of the antenna curtain on the supporting structure, thereby achieving the purpose of reducing costs and increasing efficiency.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A wire antenna sling tensioning device, the improvement of which is that it includes a pulley assembly at the upper end of an antenna support frame and an adjusting bracket assembly at the lower end, the pulley assembly includes a single fixed pulley, a double fixed pulley and a multi-link pulley, the single fixed pulley has a pulley groove, the double fixed pulley has two pulley grooves, the A end of the multi-link pulley has three pulley grooves, and the B end has a pulley groove, the single fixed pulley and the double fixed pulley are both installed on the antenna support frame, and the double fixed pulley is above the single fixed pulley, the front end of the pulley rope passes around the pulley groove of the single fixed pulley, and then passes around the first pulley groove of the A end of the multi-link pulley, the first pulley groove of the double fixed pulley, and the multi-link pulley in sequence After the second pulley groove at the A end, the second pulley groove of the double fixed pulley, and the third pulley groove at the A end of the multi-linkage pulley, it is connected to the top of the antenna support frame, and the end of the cable net wire rope of the antenna curtain is passed through the pulley groove at the B end of the multi-linkage pulley; the adjustment bracket assembly includes two upper and lower fixed frames installed on the antenna support frame, and more than one pair of limiting cables are installed between the two fixed frames. Each pair of limiting cables is passed through two upper and lower limiting plates that can slide along the limiting cables. The two limiting plates of the same pair of limiting cables are connected by a counterweight pull rod, and a counterweight block is installed on the counterweight pull rod. After the rear end of the pulley rope of the pulley assembly is divided into the same number of roots as the number of pairs of limiting cables, they are respectively connected to each upper limit plate.

[0007] Furthermore, the single-jointed fixed pulley and the double-jointed fixed pulley are insulated and connected to the antenna support frame through a pull rod and an insulating pull plate respectively.

[0008] Furthermore, the front end of the pulley rope is connected to the tower top frame on the top of the antenna support frame.

[0009] Furthermore, the number of the limiting cables is two pairs, and the rear end of the pulley rope is divided into two, which are respectively connected to the upper limit plates of the two pairs of limiting cables.

[0010] The beneficial effects of the utility model are:

[0011] The cable tensioning device disclosed in the utility model has a self-adjusting function. By maintaining a constant tension in the cable net of the antenna curtain, the sag of the antenna curtain does not change significantly with the seasons, thereby increasing the consistency of the array antenna. Through the cooperation of a single-link fixed pulley, a double-link fixed pulley and a multi-link pulley, the cable tensioning device becomes a labor-saving device, which not only reduces the force of the antenna curtain on the supporting structure, but also facilitates the erection, disassembly and maintenance of the antenna curtain.

[0012] The sling tensioning device disclosed by the utility model has a simple principle, is technically feasible, and is convenient to use. It can ensure the safety of the antenna and the stability of the electrical performance, and facilitates the installation, disassembly, and maintenance of the antenna.

[0013] The sling tensioning device disclosed in the utility model uses fewer types and quantities of parts, has a simple and compact structure, is easy and fast to install, requires fewer operators, and has high installation efficiency. It can be used not only in the antenna structure industry, but also in other mechanical structure fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the installation position of the sling tensioning device disclosed in Example 1 of the utility model on the antenna support frame;

[0015] Figure 2 It is a structural schematic diagram of a pulley assembly in a sling tensioning device disclosed in Example 1 of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the adjusting bracket assembly in the sling tensioning device disclosed in Example 1 of the utility model;

[0017] Figure 4 yes Figure 3 AA section view;

[0018] Figure 5 It is a schematic diagram of the main structure of a single-link fixed pulley in the sling tensioning device disclosed in Example 1 of the utility model;

[0019] Figure 6 It is a top view structural schematic diagram of a single-link fixed pulley in the sling tensioning device disclosed in Example 1 of the utility model;

[0020] Figure 7 It is a schematic diagram of the main structure of the double fixed pulley in the sling tensioning device disclosed in Example 1 of the utility model;

[0021] Figure 8 It is a schematic diagram of the top view of the structure of the double fixed pulley in the sling tensioning device disclosed in Example 1 of the utility model;

[0022] Fig. 9 It is a schematic diagram of the main structure of the multi-linkage pulley in the sling tensioning device disclosed in Example 1 of the utility model;

[0023] Fig.10 It is a schematic diagram of the top view of the structure of the multi-linkage pulley in the sling tensioning device disclosed in Example 1 of the utility model.

[0024] Figure numerals: 1—pulley assembly, 2—adjusting bracket assembly, 3—antenna supporting frame, 11—single fixed pulley, 12—double fixed pulley, 13—multi-linked pulley, 14—pulley rope, 21—fixing frame, 22—limiting rope, 23—limiting plate, 24—counterweight pull rod, 25—counterweight block, 31—tower top frame. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] Embodiment 1, this embodiment discloses a wire antenna sling tensioning device, such as Figure 1 As shown, it includes a pulley assembly 1 at the upper end of the antenna support frame 3 and an adjustment bracket assembly 2 at the lower end, as shown in FIG. Figure 2 As shown, the pulley assembly includes a single fixed pulley 11, a double fixed pulley 12 and a multi-link pulley 13. Figure 5 , 6, the single fixed pulley has a pulley groove, such as Figure 7 , as shown in Figure 8, the double fixed pulley has two pulley grooves, such as Fig. 9 As shown in 10, the A end of the multi-link pulley has three pulley grooves and the B end has one pulley groove. The single fixed pulley and the double fixed pulley are insulated and connected to the antenna support frame through a pull rod and an insulating pull plate respectively, and the double fixed pulley is above the single fixed pulley. After the front end of the pulley rope 14 passes around the pulley groove of the single fixed pulley, it passes around the first pulley groove of the A end of the multi-link pulley, the first pulley groove of the double fixed pulley, the second pulley groove of the A end of the multi-link pulley, the second pulley groove of the double fixed pulley, and the third pulley groove of the A end of the multi-link pulley in sequence, and then is connected to the tower top frame 31 at the top of the antenna support frame, and the end of the cable net wire rope of the antenna curtain is passed through the pulley groove at the B end of the multi-link pulley; as shown in Figure 3 4, the adjustment bracket assembly includes two upper and lower fixing frames 21 installed on the antenna support frame, one or more pairs of limit cables 22 are installed between the two fixing frames, and each pair of limit cables is penetrated with two upper and lower limit plates 23 that can slide along the limit cables. The two limit plates of the same pair of limit cables are connected by a counterweight pull rod 24, and a counterweight block 25 is installed on the counterweight pull rod. The rear end of the pulley rope of the pulley assembly is divided into the same number of pairs of limit cables and connected to each upper limit plate respectively.

[0027] In this embodiment, there are two pairs of limit ropes, and the rear end of the pulley rope is divided into two, which are respectively connected to the upper limit plates of the two pairs of limit ropes to keep the tension of each section of the pulley rope the same.

[0028] Specifically, the rear end of the pulley rope is pulled down parallel to the antenna support frame tower to the lower end and then split into two ropes, which are respectively connected to the upper limit plates of the two pairs of limit ropes, and then connected to the counterweight. The self-adjustment function is achieved by sliding the counterweight up and down, so that the cable net of the antenna curtain maintains a constant tension, and the counterweight can only slide up and down along the limit rope with the limit plate, which can effectively prevent the pulley rope from driving the counterweight to swing back and forth in strong winds, preventing damage to the antenna support frame tower and the counterweight.

[0029] The material of the pulley block is mainly stainless steel (304), and the pulley rope is stainless steel wire rope (material 304). The fixed frame, tower top frame and other structural parts are made of carbon steel, which are hot-dip galvanized after machining and coated with heavy anti-corrosion paint.

Claims

1. A wire antenna sling tensioning device, characterized in that: The invention comprises a pulley assembly at the upper end of the antenna support frame and an adjusting bracket assembly at the lower end, wherein the pulley assembly comprises a single fixed pulley, a double fixed pulley and a multi-link pulley, wherein the single fixed pulley has a pulley groove, the double fixed pulley has two pulley grooves, the A end of the multi-link pulley has three pulley grooves and the B end has a pulley groove, wherein the single fixed pulley and the double fixed pulley are both installed on the antenna support frame, and the double fixed pulley is above the single fixed pulley, and the front end of the pulley rope passes around the pulley groove of the single fixed pulley, and then passes around the first pulley groove of the A end of the multi-link pulley, the first pulley groove of the double fixed pulley, the second pulley groove of the A end of the multi-link pulley, After the second pulley groove of the double fixed pulley and the third pulley groove of the multi-link pulley A end, they are connected to the top of the antenna support frame, and the end of the cable net wire rope of the antenna curtain is passed through the pulley groove at the B end of the multi-link pulley; the adjustment bracket assembly includes two upper and lower fixed frames installed on the antenna support frame, and more than one pair of limiting cables are installed between the two fixed frames. Each pair of limiting cables is passed through two upper and lower limiting plates that can slide along the limiting cables. The two limiting plates of the same pair of limiting cables are connected by a counterweight pull rod, and a counterweight block is installed on the counterweight pull rod. After the rear end of the pulley rope of the pulley assembly is divided into the same number of roots as the number of pairs of limiting cables, they are respectively connected to each upper limit plate.

2. The wire antenna suspension cable tensioning device according to claim 1, characterized in that: The single-joint fixed pulley and the double-joint fixed pulley are insulated and connected to the antenna support frame through a pull rod and an insulating pull plate respectively.

3. The wire antenna suspension cable tensioning device according to claim 1, characterized in that: The front end of the pulley rope is connected to the tower top frame on the top of the antenna support frame.

4. The wire antenna suspension cable tensioning device according to claim 1, characterized in that: There are two pairs of limit cables, and the rear end of the pulley rope is divided into two, which are respectively connected to the upper limit plates of the two pairs of limit cables.

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