A spiral tensioning device

Abstract

This utility model discloses a spiral tensioning device, relating to the field of belt tensioning technology. It includes a spiral support bracket with a slide rail on it. A movable sliding sleeve is placed on the slide rail and connected to a tensioning roller. The spiral support bracket also has a screw, which is threadedly connected to a nut on the sliding sleeve. This utility model enables the tensioning roller to move under the rotation of the screw, thereby tensioning the belt of a belt conveyor.

Description

Technical Field

[0001] This utility model relates to the field of tape tensioning technology, specifically a spiral tensioning device. Background Technology

[0002] One of the main functions of the tensioning device in a belt conveyor is to ensure that the belt has sufficient tension, thereby generating the necessary friction between the rollers and the belt to prevent slippage. It also limits the sag of the belt between the supporting rollers to ensure the normal operation of the conveyor. During use, the belt will elongate due to various factors (such as temperature changes and material properties), and the tensioning device can maintain the belt's tension. By properly adjusting the belt tension, the tensioning device can prevent belt slack, thereby reducing abnormalities such as belt slippage, deviation, and surge.

[0003] Currently, the national standard for screw tensioning devices in the belt conveyor industry is only applicable to traditional screw tensioning tail frames, which are connected to the screw tensioning tail frames via a slide. This can no longer meet the tensioning arrangement requirements in complex environments. Furthermore, in order to meet the tensioning stroke, the screw is usually designed to be long, which makes it prone to deformation and breakage during use. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a spiral tensioning device. Under the rotation of the screw, the sliding sleeve moves, which in turn moves the tensioning roller to achieve tensioning of the belt conveyor belt.

[0005] The purpose of this utility model is achieved through the following technical solution: a spiral tensioning device, the device including a spiral tensioning bracket, a slide rail provided on the spiral tensioning bracket, a movable sliding sleeve placed on the slide rail, the sliding sleeve being connected to a tensioning roller, and a screw provided on the spiral tensioning bracket, the screw being threadedly connected to the nut of the sliding sleeve. The position of the sliding sleeve is moved by rotating the screw. Since the screw is threadedly connected to the nut of the sliding sleeve, when the operator rotates the screw clockwise, the sliding sleeve moves to the right along the slide rail under the drive of the screw thread; when the operator rotates the screw counterclockwise, the sliding sleeve moves to the left along the slide rail under the drive of the screw thread.

[0006] The screw includes a handle, a rod, and a fixing part for fixing the screw support. The handle is for the worker to grip.

[0007] The vertical cross-section of the fixing part is I-shaped, and the top of the screw bracket is provided with two vertical plates, and the fixing part is fixedly connected to one of the vertical plates.

[0008] On one side of the vertical plate, there is a fixing plate for clamping the middle part of the fixing portion. The fixing plate and the vertical plate are fixed by bolts. The fixing plate can be two concave-shaped blocks with a similar "concave" cross-section. A semi-cylindrical groove is provided on one side of each of the two concave-shaped blocks. The semi-cylindrical grooves of the two concave-shaped blocks are placed opposite to each other. The middle part after the two concave-shaped blocks are placed opposite to each other consists of two semi-cylindrical grooves to form a cylindrical groove, and the two concave-shaped blocks are used to clamp the middle part of the fixing portion of the screw rod.

[0009] It further includes a tensioning frame. Multiple bolt holes are provided at the top of the tensioning frame. The screw tensioning bracket is fixedly connected to the tensioning frame through the bolt holes, which is convenient for increasing the adjustment range of the tensioning stroke. First, the fixed position of the screw tensioning bracket on the tensioning frame can be adjusted to tension the belt on the tensioning roller. If the length of the tensioning frame is still not enough to achieve the effect of belt tensioning, then rotate the screw rod to adjust the position of the sliding sleeve on the sliding rail, playing a role of double adjustment.

[0010] The multiple bolt holes are arranged equidistantly at the top of the tensioning frame. This distance can be set to be greater than the tensioning stroke by 500 mm. The specific length of the tensioning stroke is related to the length of the belt.

[0011] The sliding sleeve and the tensioning roller are fixed by fasteners.

[0012] The belt of the belt conveyor is sleeved outside the tensioning roller. By driving the sliding sleeve with the screw rod, the position of the tensioning roller is then moved to tension the belt.

[0013] The beneficial effects of the present utility model are as follows: 1. Under the rotation of the screw rod of the present utility model, the sliding sleeve drives the tensioning roller to move, realizing the tensioning of the belt of the belt conveyor.

[0014] 2. The present utility model can raise the sliding sleeve through the screw tensioning bracket, and can realize the installation of this screw tensioning device on a large steel tensioning frame.

[0015] 3. The present utility model realizes the fixation of the screw tensioning bracket at different positions by adjusting the bolt hole positions of the screw tensioning bracket on the tensioning frame, thereby fixing the position of the tensioning roller and increasing the adjustable range of the tensioning stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the present utility model; Figure 2 is Figure 1 the right view of Figure 3 is Figure 1 the top view of Figure 4 is a schematic structural view of the screw tensioning bracket; Figure 5A cross-sectional structural diagram showing the connection between the screw, the fixing plate, and the vertical plate of the screw support; Figure 6 This is a schematic diagram of the screw structure; In the diagram: 1-Tensioning roller, 2-Sliding sleeve, 3-Slide rail, 4-Screw, 5-Screw support bracket, 6-Tensioning frame, 7-Fixing plate, 8-Tape, 41-Handle, 42-Fixing part, 43-Rod part. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] In one embodiment of this application: like Figures 1 to 3 As shown, a spiral tensioning device includes two spiral brackets 5, each with a slide rail 3 welded on it. A movable sleeve 2 is placed on each slide rail 3, and the sleeve 2 can slide left and right along the slide rail 3. The two sleeves 2 are fixed to the bearing seats on the left and right sides of the tensioning roller 1 respectively using standard bolts or other fasteners. A screw 4 is also provided on the spiral bracket 5. A nut is fixed inside the sleeve 2, and the screw 4 is threadedly connected to the nut of the sleeve 2. The conveyor belt 8 is fitted onto the outside of the tensioning roller 1. When it is necessary to tension the conveyor belt 8, the operator holds the screw 4 and rotates it clockwise. The thread on the screw 4 drives the nut, which in turn drives the sleeve 2. The sleeve 2 then moves the tensioning roller 1 to the right. After the tensioning roller 1 reaches the target position, the screw 4 is stopped from rotating, thus fixing the position of the tensioning roller 1 and achieving the tensioning of the conveyor belt 8.

[0020] In the second embodiment of this application: like Figures 4-6As shown, based on the previous embodiment, in this embodiment, the screw rod 4 is improved. The screw rod 4 includes a handle 41, a rod portion 43, and a fixing portion 42 for fixing the screw tensioning bracket 5. The handle 41 is used for staff to grasp, and the rod portion 43 is provided with threads.

[0021] The vertical cross-section of the fixing portion 42 is a horizontal "I" shape. The fixing portion 42 is composed of two large cylinders and one small cylinder. The diameter of the middle part of the fixing portion 42 is smaller than that of both ends (that is, the small cylinder is sandwiched between the two large cylinders to form an integral body). As Figure 1 shown, there are two vertical plates on the top of the screw tensioning bracket 5. On the right side of the right vertical plate, there is a fixing plate 7 for clamping the middle part of the fixing portion 42. After the fixing plate 7 clamps the fixing portion 42 of the screw rod 4, the right vertical plate and the fixing plate 7 are fixed by bolts. The left and right ends of the slide rail 3 are respectively welded and fixed to the left and right vertical plates of the screw tensioning bracket 5. The rod portion 43 of the screw rod 4 is threadedly connected to the nut in the sliding sleeve 2.

[0022] The fixing plate 7 is composed of two concave-shaped blocks with a vertical cross-section similar to a "concave" shape. The two concave-shaped blocks are arranged oppositely, and a semi-cylindrical groove is provided on each of the opposite surfaces of the two concave-shaped blocks. The middle part of the fixing portion 42 of the screw rod 4 is clamped by the two semi-cylindrical grooves of the two concave-shaped blocks.

[0023] In the third embodiment of the present application: Based on the first or second embodiment, in this embodiment, the screw tensioning device is improved. The screw tensioning device further includes a tensioning frame 6. The tensioning frame 6 is composed of twelve rectangular parallelepiped columns. From Figure 1 it can be seen that X-shaped braces are provided on both the front and back sides of the tensioning frame 6 to reinforce the tensioning frame 6. A plurality of bolt holes or threaded holes are provided on the top of the tensioning frame 6. The screw tensioning bracket 5 and the tensioning frame 6 are fixedly connected by bolts passing through the bolt holes or screws passing through the threaded holes, which is convenient for staff to fix the position of the screw tensioning bracket 5 on the tensioning frame 6, thereby fixing the position of the tensioned tape. When it is necessary to tension the tape, the position of the screw tensioning bracket 5 on the tensioning frame 6 can be adjusted first. If it is still not enough, the position of the tensioning roller 1 can be adjusted by the screw rod 4, which can achieve double adjustment and increase the adjustment range of the tensioning stroke. In this structure, the rod portion 43 of the screw rod 4 can be shortened, so that the rod portion 43 of the screw rod 4 is not easily deformed under force.

[0024] The plurality of bolt holes or threaded holes are arranged at equal distances (it can be 1 cm, 5 cm, 10 cm, etc. between adjacent bolt holes or threaded holes) on the top of the tensioning frame 6. This distance can be set to be greater than the tensioning stroke of 500 mm. The tensioning stroke is Figure 1 as shown, and the specific stroke length is related to the length of the tape.

[0025] The above description is merely an embodiment of this utility model. It should be understood that this utility model is not limited to the form disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A screw tensioning device comprising a screw tension bracket (5), characterized in that: The screw pull support (5) is provided with a slide rail (3), the slide rail (3) is placed with a movable sliding sleeve (2), the sliding sleeve (2) is connected with a tensioning roller (1), the screw pull support (5) is further provided with a screw rod (4), and the screw rod (4) is threadedly connected with the nut of the sliding sleeve (2).

2. A helical tensioner as in claim 1, wherein: The screw rod (4) comprises a handle (41), a rod portion (43) and a fixing portion (42) for fixing the screw pull support (5).

3. A helical tensioner as in claim 2, wherein: The vertical section of the fixing portion (42) is in the shape of an I-beam, the top of the screw pull support (5) is provided with two vertical plates, and the fixing portion (42) is fixedly connected with one of the vertical plates.

4. A helical tensioner as in claim 3, wherein: One side of the vertical plate is provided with a fixing plate (7) for clamping the middle part of the fixing portion (42), and the fixing plate (7) is fixed with the vertical plate through bolts.

5. A helical tensioner as in claim 1, wherein: Further comprising a tensioning frame (6), the top of the tensioning frame (6) is provided with a plurality of bolt holes, and the screw pull support (5) is fixedly connected with the tensioning frame (6) through the bolt holes.

6. A helical tensioner as in claim 5, wherein: The plurality of bolt holes are equidistantly arranged on the top of the tensioning frame (6).

7. A helical tensioner as in claim 1, wherein: The sliding sleeve (2) is fixed with the tensioning roller (1) through fasteners.

8. A helical tensioner as in claim 1, wherein: The rubber belt (8) of the belt conveyor is sleeved outside the tensioning roller (1).

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