Fire-fighting alarm wire harness laying anti-drag pulley block tool

Abstract

The utility model relates to the technical field of fire-fighting engineering, in particular to a fire-fighting alarm wire harness laying anti-drag pulley block tool which comprises a support and a supporting unit, the supporting unit comprises a supporting plate, a trapezoidal sliding seat, a connecting plate, an adjusting bolt, a rotating shaft, a limiting plate, a bevel wheel, a rolling assembly and a mounting assembly, and the limiting plate is fixedly connected with the rotating shaft. During use, the support is fixed into a bridge through the mounting assembly, the trapezoidal sliding seat is slid to move in the trapezoidal sliding groove and then is fixed in cooperation with the adjusting bolt, then the fire alarm wire harness sequentially bypasses the bevel wheel to make contact with the rolling assembly, the rolling assembly is used for reducing the friction coefficient of the fire alarm wire harness, and the friction coefficient of the fire alarm wire harness is reduced. When the fire alarm wire harness is pulled, the bevel wheel can rotate on the outer side wall of the rotating shaft, the pulling stability of the fire alarm wire harness is guaranteed, the contact between the fire alarm wire harness and the support is limited through the mode, the abrasion condition is reduced, and the service life of the fire alarm wire harness is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of fire protection engineering technology, and in particular to a drag-reducing pulley assembly for laying fire alarm wiring harnesses. Background Technology

[0002] Existing fire protection engineering requires the installation of fire alarm wiring harnesses. The installation method of fire alarm wiring harnesses is a "human wave tactic". When laying the main fire protection line, because the tensile strength of the fire protection low voltage line is low and the outer sheath of the wire is easily scratched and worn, a large number of workers need to be placed at the joints of the cable tray and the bends, which results in low work efficiency and a great waste of time and materials.

[0003] The prior art patent application with authorization publication number CN214087060U discloses a drag-reducing pulley assembly for laying fire alarm wiring harnesses. It includes a cable tray installed below the support beam, a wire trough inside the cable tray, supports at both ends of the bottom of the wire trough, a roller between the supports, an adjusting screw passing through the roller, and adjusting nuts at both ends of the adjusting screw. The adjusting nuts are located outside the supports. It is applicable to the construction range of laying wiring harnesses for automatic fire alarm systems. It has a simple structure and is easy to operate.

[0004] However, in the aforementioned prior art, the fire alarm wiring harness is prone to contact with the support when pulled, leading to wear and tear and affecting the service life of the fire alarm wiring harness. Utility Model Content

[0005] The purpose of this utility model is to provide a drag-reducing pulley assembly for laying fire alarm wiring harnesses, which aims to solve the problem in the prior art where the support of the fire alarm wiring harness is easily contacted when pulled, resulting in wear and affecting the service life of the fire alarm wiring harness.

[0006] To achieve the above objectives, this utility model provides a drag-reducing pulley assembly for laying fire alarm wiring harnesses, including a support and a support unit. The support unit includes a support plate, a trapezoidal slide, a connecting plate, an adjusting bolt, a rotating shaft, a limiting plate, an inclined wheel, a rolling assembly, and an installation assembly. The support unit is disposed on the inner wall of the support. The support plate is fixedly connected to the support and located on the inner wall of the support. The support plate has a trapezoidal groove that slides with the trapezoidal slide. Both ends of the connecting plate are fixedly connected to the support and the support plate, respectively. The adjusting bolt is threadedly connected to the trapezoidal slide and is located above the trapezoidal slide. The support plate has a strip-shaped hole, which is slidably engaged with the adjusting bolt. The rotating shaft is fixedly connected to the trapezoidal slide and is located below the trapezoidal slide. The inclined wheel is rotatably connected to the rotating shaft and is located on the outer side wall of the rotating shaft. The limiting plate is fixedly connected to the rotating shaft and is located below the rotating shaft, and the limiting plate is in contact with the inclined wheel. The rolling assembly is disposed on the inner bottom wall of the support, and the mounting assembly is disposed on the outer side wall of the support.

[0007] The rolling assembly includes a base, a rolling bearing, and a rolling roller. The base is fixedly connected to the support and is located on the inner bottom wall of the support. The rolling bearing is rotatably connected to the base and is located on the inner side wall of the base. The rolling roller is interference-fitted to the rolling bearing and is located on the inner side wall of the rolling bearing.

[0008] The rolling assembly further includes a limiting ring, which is fixedly connected to the rolling roller and located on the outer side wall of the rolling roller.

[0009] The mounting assembly includes an ear plate, a fixing seat, and a reinforcing rib. The ear plate is fixedly connected to the support and is located on the outer side wall of the support. The fixing seat is fixedly connected to the ear plate and is located below the ear plate. The two ends of the reinforcing rib are fixedly connected to the ear plate and the support, respectively. The ear plate has a round hole.

[0010] The mounting assembly further includes a slip ring and a spring. The slip ring is slidably connected to the fixed base and is located on the inner side wall of the fixed base. The two ends of the spring are fixedly connected to the slip ring and the ear plate, respectively.

[0011] This utility model discloses a drag-reducing pulley assembly for laying fire alarm wiring harnesses. In use, the support is fixed to the cable tray using the mounting assembly. The trapezoidal slide block is slidable within the trapezoidal groove and then secured with adjusting bolts. The fire alarm wiring harness is then passed sequentially around the inclined wheel until it contacts the rolling assembly. The rolling assembly reduces the friction coefficient of the fire alarm wiring harness. When the wiring harness is pulled, the inclined wheel rotates on the outer wall of the shaft, ensuring the stability of the wiring harness movement. This method limits contact between the fire alarm wiring harness and the support, reducing wear and extending the service life of the fire alarm wiring harness. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a structural schematic diagram of the drag-reducing pulley assembly for laying fire alarm wiring harnesses according to this utility model.

[0014] Figure 2 This is a top view of the fire alarm wiring harness laying drag-reducing pulley assembly of this utility model.

[0015] Figure 3 This is the utility model Figure 2 A sectional view along line AA.

[0016] Figure 4 This is the utility model Figure 3 Enlarged view of the local structure at point B.

[0017] 101-Support, 102-Support plate, 103-Trapezoidal slide, 104-Connecting plate, 105-Adjusting bolt, 106-Rotating shaft, 107-Limiting plate, 108-Inclined wheel, 109-Base, 110-Rolling bearing, 111-Rolling roller, 112-Limiting ring, 113-Ear plate, 114-Fixed seat, 115-Reinforcing rib, 116-Slip ring, 117-Spring, 118-Trapezoidal groove, 119-Strip hole, 120-Round hole. Detailed Implementation

[0018] Please see Figures 1 to 4 ,in, Figure 1 This is a structural schematic diagram of the drag-reducing pulley assembly for laying fire alarm wiring harnesses according to this utility model. Figure 2 This is a top view of the fire alarm wiring harness laying drag-reducing pulley assembly of this utility model. Figure 3 This is the utility model Figure 2 AA-line sectional view, Figure 4 This is the utility model Figure 3Enlarged view of the local structure at point B.

[0019] This utility model provides a drag-reducing pulley assembly for laying fire alarm wiring harnesses, including a support 101 and a support unit. The support unit includes a support plate 102, a trapezoidal slide 103, a connecting plate 104, an adjusting bolt 105, a rotating shaft 106, a limiting plate 107, an inclined wheel 108, a rolling assembly, and an installation assembly. The rolling assembly includes a base 109, a rolling bearing 110, a rolling roller 111, and a limiting ring 112. The installation assembly includes an ear plate 113, a fixing seat 114, a reinforcing rib 115, a slip ring 116, and a spring 117. The support plate 102 has a trapezoidal slide groove 118 and a strip hole 119. The ear plate 113 has a round hole 120.

[0020] The support unit is disposed on the inner side wall of the support 101; the support plate 102 is fixedly connected to the support 101 and located on the inner side wall of the support 101; the support plate 102 has a trapezoidal groove 118, which slidably engages with the trapezoidal slide block 103; both ends of the connecting plate 104 are fixedly connected to the support 101 and the support plate 102 respectively; the adjusting bolt 105 is threadedly connected to the trapezoidal slide block 103 and is located above the trapezoidal slide block 103; the support plate 102 has a strip-shaped hole 119. The strip hole 119 is slidably engaged with the adjusting bolt 105. The rotating shaft 106 is fixedly connected to the trapezoidal slide 103 and is located below the trapezoidal slide 103. The inclined wheel 108 is rotatably connected to the rotating shaft 106 and is located on the outer side wall of the rotating shaft 106. The limiting plate 107 is fixedly connected to the rotating shaft 106 and is located below the rotating shaft 106. The limiting plate 107 is in contact with the inclined wheel 108. The rolling assembly is disposed on the inner bottom wall of the support 101. The mounting assembly is disposed on the outer side wall of the support 101.

[0021] In this embodiment, during use, the support 101 is fixed to the cable tray using the mounting assembly. The trapezoidal slide 103 is slid to move within the trapezoidal groove 118 and then fixed with the adjusting bolt 105. Afterward, the fire alarm harness is sequentially passed around the inclined wheel 108 until it contacts the rolling assembly. The rolling assembly is used to reduce the friction coefficient of the fire alarm harness. When the fire alarm harness is pulled, the inclined wheel 108 rotates on the outer wall of the rotating shaft 106, ensuring the stability of the fire alarm harness pulling. In this way, the contact between the fire alarm harness and the support 101 is limited, reducing wear and extending the service life of the fire alarm harness.

[0022] Furthermore, the base 109 is fixedly connected to the support 101 and is located on the inner bottom wall of the support 101; the rolling bearing 110 is rotatably connected to the base 109 and is located on the inner side wall of the base 109; and the rolling roller 111 is interference-fitted to the rolling bearing 110 and is located on the inner side wall of the rolling bearing 110.

[0023] In this embodiment, the cooperation between the rolling bearing 110 and the rolling roller 111 reduces the friction coefficient of the fire alarm wiring harness, effectively improving the efficiency and quality of fire alarm wiring harness installation.

[0024] Furthermore, the limiting ring 112 is fixedly connected to the rolling roller 111 and is located on the outer side wall of the rolling roller 111.

[0025] In this embodiment, the limiting ring 112 is used to restrict the lateral movement of the rolling roller 111 and prevent the rolling roller 111 from sliding left and right within the base 109.

[0026] Furthermore, the ear plate 113 is fixedly connected to the support 101 and is located on the outer side wall of the support 101. The fixing seat 114 is fixedly connected to the ear plate 113 and is located below the ear plate 113. The two ends of the reinforcing rib 115 are fixedly connected to the ear plate 113 and the support 101 respectively. The ear plate 113 has a round hole 120.

[0027] In this embodiment, the support 101 is installed into the cable tray by using bolts that pass through the fixing seat 114 and the round hole 120, which facilitates operation and use by the staff.

[0028] Furthermore, the slip ring 116 is slidably connected to the fixed base 114 and is located on the inner side wall of the fixed base 114, and the two ends of the spring 117 are fixedly connected to the slip ring 116 and the ear plate 113 respectively.

[0029] In this embodiment, the slip ring 116 and the spring 117 work together to provide a reverse force to the locking bolt, thereby better securing the ear plate 113.

[0030] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments, and equivalent variations made in accordance with the claims of this application, still fall within the scope of this application.

Claims

1. A drag-reducing pulley assembly for laying fire alarm wiring harnesses, comprising a support, characterized in that, It also includes a support unit, which is disposed on the inner side wall of the support; The support unit includes a support plate, a trapezoidal slide, a connecting plate, an adjusting bolt, a rotating shaft, a limiting plate, an inclined wheel, a rolling assembly, and an installation assembly. The support plate is fixedly connected to the support and is located on the inner side wall of the support. The support plate has a trapezoidal groove that slides with the trapezoidal slide. The two ends of the connecting plate are fixedly connected to the support and the support plate, respectively. The adjusting bolt is threadedly connected to the trapezoidal slide and is located above the trapezoidal slide. The support plate has a strip hole that slides with the adjusting bolt. The rotating shaft is fixedly connected to the trapezoidal slide and is located below the trapezoidal slide. The inclined wheel is rotatably connected to the rotating shaft and is located on the outer side wall of the rotating shaft. The limiting plate is fixedly connected to the rotating shaft and is located below the rotating shaft, and the limiting plate contacts the inclined wheel. The rolling assembly is disposed on the inner bottom wall of the support, and the installation assembly is disposed on the outer side wall of the support.

2. The drag-reducing pulley assembly for laying fire alarm wiring harnesses as described in claim 1, characterized in that, The rolling assembly includes a base, a rolling bearing, and a rolling roller. The base is fixedly connected to the support and is located on the inner bottom wall of the support. The rolling bearing is rotatably connected to the base and is located on the inner side wall of the base. The rolling roller is interference-fitted to the rolling bearing and is located on the inner side wall of the rolling bearing.

3. The drag-reducing pulley assembly for laying fire alarm wiring harnesses as described in claim 2, characterized in that, The rolling assembly also includes a limiting ring, which is fixedly connected to the rolling roller and located on the outer side wall of the rolling roller.

4. The drag-reducing pulley assembly for laying fire alarm wiring harnesses as described in claim 3, characterized in that, The mounting assembly includes an ear plate, a fixing seat, and a reinforcing rib. The ear plate is fixedly connected to the support and is located on the outer side wall of the support. The fixing seat is fixedly connected to the ear plate and is located below the ear plate. The two ends of the reinforcing rib are fixedly connected to the ear plate and the support, respectively. The ear plate has a round hole.

5. The drag-reducing pulley assembly for laying fire alarm wiring harnesses as described in claim 4, characterized in that, The mounting assembly also includes a slip ring and a spring. The slip ring is slidably connected to the fixed base and is located on the inner side wall of the fixed base. The two ends of the spring are fixedly connected to the slip ring and the ear plate, respectively.

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