Short-distance swing tensioning device of belt conveyor

Abstract

The utility model relates to a short-distance swing tensioning device of a belt conveyor. The short-distance swing tensioning device comprises an electro-hydraulic push rod, a swing arm, a swing arm roller assembly, a first turnabout roller and a second turnabout roller. The swing arm roller assembly is composed of a driving end roller, a middle roller and a swing end roller. The rubber belt sequentially bypasses the head wheel, the first turnabout drum, the swing end drum, the middle drum, the driving end drum, the second turnabout drum and the tail wheel to form a closed annular structure. According to the utility model, the return rubber belt of the belt conveyor is folded by swinging the tensioning device, so that the effect of tensioning the rubber belt is achieved; the positions of the head wheel and the tail wheel of the belt conveyor can be kept fixed, and automatic adjustment of the tension of the rubber belt can be achieved by monitoring the tension of the rubber belt and the stroke of the electro-hydraulic push rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to a belt conveyor technical field especially relates to a short distance belt conveyor swing tension device. BACKGROUND

[0002] The normal operation of the belt conveyor must be ensured that the conveyor belt has a certain tension, and the device that provides tension is the tension device. The tension device is to adjust the tension of the conveyor belt, and the device that generates the required friction driving tension. So-called "tension", has two meanings of absorbing the elongation of the conveyor belt and providing tension for the conveyor belt.

[0003] The function of the belt conveyor tension device is as follows: (1) the conveyor belt has enough tension to ensure that the driving force between the conveyor belt and the transmission drum is sufficient to prevent slipping; (2) to ensure that the tension of each point of the conveyor belt is not lower than a given value to prevent the conveyor belt from being too loose between the rollers to cause material scattering and increase the running resistance; (3) to compensate for the elastic and plastic deformation of the conveyor belt; (4) to provide the necessary travel for the conveyor belt rejoint.

[0004] Under normal circumstances, the belt conveyor belt tension device is divided into three types according to the arrangement: vertical tension device, vehicle tension device and spiral tension device. Among the three tension devices, the spiral tension device is a fixed tension, the manual adjustment range and the tension are limited, and it is suitable for short distance belt conveyor with a length of 30m or less and belt conveyor set on mobile equipment. For the belt conveyor that conveys light materials and has a very small conveying capacity, the machine length can be appropriately increased.

[0005] At present, the tension device of the short distance belt conveyor mostly adopts the spiral tension device, but the existing short distance belt conveyor spiral tension device has the following problems:

[0006] 1) Whether the spiral tension device is arranged at the tail or the head of the conveyor, the tail wheel or the head wheel position will change with the change of the tension travel. Especially for reversible belt conveyor, the head and tail need to be unloaded, and the displacement of the head wheel or tail wheel will change the material falling point of the downstream belt conveyor, resulting in the deviation of the material on the downstream belt conveyor, and ultimately leading to the deviation of the downstream belt conveyor.

[0007] 2) The spiral tensioning has the characteristics of simple structure and compact arrangement. However, the tension and travel range of the spiral tensioning manual adjustment are small, and the adjustment of the tensioning force size is only operated by experience and observation of the conveyor belt state, which cannot automatically maintain the constant pre-tension and needs to be adjusted manually.

[0008] In summary, if the tension of the belt conveyor can be automatically adjusted according to the operating condition of the belt conveyor, and the position of the tensioning roller can be automatically adjusted, the stable operation of the short-distance belt conveyor can be ensured. SUMMARY

[0009] The utility model provides a kind of short-distance belt conveyor swing tensioning device, and the return rubber belt of belt conveyor is folded by swing tensioning device, and the effect of tensioning rubber belt is played;It not only can make the head wheel and tail wheel of belt conveyor keep fixed, but also can realize the automatic regulation of rubber belt tension by rubber belt tension and electro-hydraulic push rod stroke monitoring.

[0010] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0011] A kind of short-distance belt conveyor swing tensioning device, be located below belt conveyor;Including electro-hydraulic push rod, swing arm, swing arm roller assembly, redirection cylinder one and redirection cylinder two;The swing arm roller assembly is composed of driving end roller, middle roller and swing end roller;Electro-hydraulic push rod is located at one side of swing arm, driving end roller is located at the driving end of swing arm, and the roller shaft of driving end roller is hinged with the extension end of electro-hydraulic push rod;Middle roller is located at the middle of swing arm, and the roller shaft of middle roller is hinged with the supporting leg of belt conveyor rack;Swing end roller is located at the swing end of swing arm;Redirection cylinder one is located on the upstream of swing tensioning device of rubber belt return path, and redirection cylinder two is located on the downstream of swing tensioning device of rubber belt return path;After rubber belt is sequentially wound around head wheel, redirection cylinder one, swing end roller, middle roller, driving end roller, redirection cylinder two and tail wheel, closed annular structure is formed.

[0012] A kind of short-distance belt conveyor swing tensioning device, further include control system;The control system is composed of main controller, travel switch, rubber belt tension monitoring device and clutch controller;The extension end outside of electro-hydraulic push rod is equipped with travel switch, and rubber belt tension monitoring device is equipped on the roller shaft of swing end roller;Tensioning self-locking mechanism is arranged between middle roller and swing rod, and the tensioning self-locking mechanism has clutch function and is controlled by clutch controller;The signal output end of travel switch and rubber belt tension monitoring device is respectively connected with control system, and the control end of electro-hydraulic push rod and clutch controller is additionally connected with control system.

[0013] Further, the tensioning self-locking mechanism is a ratchet pawl self-locking mechanism, and the clutch controller is an electromagnetic controller;The electromagnetic controller is used to control the pawl to be detached from the corresponding positioning groove in the ratchet wheel along the radial direction or axial direction.

[0014] Further, the electro-hydraulic push rod is arranged on the push rod support.

[0015] Further, the driving end roller has an initial working position, and a driving end roller support is arranged on the supporting leg of the belt conveyor frame at a position corresponding to the initial working position of the driving end roller; when the driving end roller is in the initial working position, the corresponding roller shaft is tightly arranged in the groove of the driving end roller support.

[0016] Further, a middle roller support is arranged on the supporting leg of the belt conveyor frame, and the roller shaft of the middle roller is hingedly connected to the middle roller support.

[0017] Further, the swing arm and the swing arm roller assembly are arranged in groups to form a swing assembly, a plurality of swing assemblies are arranged in the swing tensioning device, the roller shafts of the driving end rollers in the plurality of swing assemblies are connected through a connecting rod I, the roller shafts of the swing end rollers in the plurality of swing assemblies are connected through a connecting rod II; the plurality of swing assemblies are driven to synchronously act by one electro-hydraulic push rod; after the rubber belt passes through the head wheel and the redirection roller I, the rubber belt successively passes through the swing end rollers, the middle rollers and the driving end rollers in the swing assemblies, and then passes through the redirection roller II and the tail wheel, thereby forming a closed loop structure.

[0018] Compared with the prior art, the belt conveyor swing tensioning device has the following beneficial effects:

[0019] 1) The rubber belt tension of the belt conveyor can be automatically detected and adjusted, and the preset rubber belt tension can be kept constant; the electro-hydraulic push rod serving as the power source for adjusting the rubber belt tension does not need to continuously work, but only needs to act when the tension needs to be adjusted.

[0020] 2) Compared with the conventional tensioning device, the positions of the tail wheel and the head wheel of the belt conveyor can be fixed, and the positions of the head wheel and the tail wheel will not change with the change of the tensioning stroke; especially for the reversible belt conveyor, the fixed positions of the head wheel and the tail wheel will not change the material falling point of the downstream belt conveyor, and the material deviation of the downstream belt conveyor will not cause the deviation of the downstream belt conveyor.

[0021] 3) The belt conveyor swing tensioning device can be arranged in groups, and the tensioning stroke of the rubber belt of the belt conveyor can be doubled.

[0022] 4) The rubber belt tension and the stroke of the electro-hydraulic push rod are monitored to automatically adjust the rubber belt tension. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structure diagram of the belt conveyor swing tensioning device Figure 1 .

[0024] Figure 2 is an installation diagram of the belt conveyor swing tensioning device Figure 1 (the swing tensioning device is in an initial state).

[0025] Figure 3 is the installation schematic of the belt conveyor swing tensioning device Figure 2 (swing tensioning device is in working state).

[0026] Figure 4 is the schematic view of the swing arm roller assembly.

[0027] Figure 5 is the structural schematic view of the swing end roller.

[0028] Figure 6 is the control system schematic view of the belt conveyor swing tensioning device.

[0029] Figure 7 is the schematic view of the group setting of the belt conveyor swing tensioning device Figure 1 (combination swing tensioning device is in initial state).

[0030] Figure 8 is the schematic view of the group setting of the belt conveyor swing tensioning device Figure 2 (combination swing tensioning device is in working state).

[0031] In the figure: 1. electro-hydraulic push rod 2. travel switch 3. swing arm 4. middle roller support 5. drive end roller support 6. drive end roller 7. middle roller 8. swing end roller 9. ratchet pawl self-locking mechanism 10. clutch controller 11. redirection roller one 12. redirection roller two 13. belt DETAILED DESCRIPTION

[0032] The specific embodiment of the utility model is further explained in combination with the drawings:

[0033] As Figures 1-3 shown, the short distance belt conveyor swing tensioning device of the utility model is arranged below the belt conveyor; including electro-hydraulic push rod 1, swing arm 3, swing arm roller assembly, redirection roller one 11 and redirection roller two 12; as Figure 4 shown, the swing arm roller assembly is composed of drive end roller 6, middle roller 7 and swing end roller 8; electro-hydraulic push rod 1 is arranged at one side of swing arm 3, drive end roller 6 is arranged at the drive end of swing arm 3, and the roller shaft of drive end roller 6 is hinged with the extension end of electro-hydraulic push rod 1; middle roller 7 is arranged at the middle part of swing arm 3, and the roller shaft of middle roller 7 is hinged with the supporting leg of the rack of belt conveyor; swing end roller 8 (as Figure 5The swing end of the swing arm 3 is provided with a swing end roller 8; a redirection roller one 11 is provided on the swing tensioning device upstream of the return path of the belt 13, and a redirection roller two 12 is provided on the swing tensioning device downstream of the return path of the belt 13; the belt 13 is sequentially wound around a head roller, the redirection roller one 11, the swing end roller 8, the middle roller 7, the driving end roller 6, the redirection roller two 11 and a tail roller to form a closed loop structure.

[0034] The short-distance belt conveyor swing tensioning device also comprises a control system. Figure 1 、 Figure 6 The control system is composed of a main controller, a travel switch 2, a belt tension monitoring device and a clutch controller 10; the travel switch 2 is arranged on the outer side of the extension end of the electro-hydraulic push rod 1, and the belt tension monitoring device (such as a resistance strain type force sensor) is arranged on the roller shaft of the swing end roller 8; a tensioning self-locking mechanism is arranged between the middle roller 7 and the swing rod 3, the tensioning self-locking mechanism has a clutch function and is controlled by the clutch controller 10; the signal output ends of the travel switch 2 and the belt tension monitoring device are respectively connected to the control system, and the control system is additionally connected to the control ends of the electro-hydraulic push rod 1 and the clutch controller 10.

[0035] Further, the tensioning self-locking mechanism is a ratchet pawl self-locking mechanism 9, and the clutch controller 10 is an electromagnetic controller; the electromagnetic controller is used for controlling the pawl to be detached from the corresponding positioning groove in the ratchet wheel in the radial direction or the axial direction.

[0036] Further, the electro-hydraulic push rod 1 is arranged on the push rod support.

[0037] Further, the driving end roller 6 has an initial working position, and a driving end roller support 5 is arranged on the leg of the belt conveyor frame at a position corresponding to the initial working position of the driving end roller 6; when the driving end roller 6 is in the initial working position, the corresponding roller shaft is tightly arranged in the groove of the driving end roller support 5.

[0038] Further, a middle roller support 4 is arranged on the leg of the belt conveyor frame, and the roller shaft of the middle roller 7 is hinged to the middle roller support 4.

[0039] Further, as shown in Figure 7 、 Figure 8As shown, the utility model discloses a short distance belt conveyor swing tensioning device, swing arm 3 and swing arm roller assembly group setting group constitute swing assembly, be equipped with multiple swing assembly in swing tensioning device, the roller shaft of drive end roller 6 in multiple swing assembly is connected through connecting rod one, the roller shaft of swing end roller 8 in multiple swing assembly is connected through connecting rod two;Multiple swing assembly is driven synchronous action by one electro-hydraulic push rod 1;After passing head wheel, change direction roller one 11, in proper order, pass swing end roller 6 in each swing assembly, middle roller 7 and drive end roller 8 of rubber belt 13, again pass change direction roller two 12 and tail wheel, form the closed annular structure.

[0040] The control method of the short distance belt conveyor swing tensioning device is as follows:

[0041] 1) according to the belt width of belt conveyor, tape speed, traffic, rubber belt model, calculate the rubber belt tension range value required for the normal operation of belt conveyor, according to the calculated rubber belt tension range value in the main controller preset rubber belt tension upper limit value and rubber belt tension lower limit value;

[0042] 2) drive end roller 6 is located in initial working position, and the pre-tension value of rubber belt 13 after vulcanization on the belt conveyor is higher than the preset rubber belt tension lower limit value;

[0043] 3) the tension value of rubber belt 13 is detected in real time through the rubber belt tension monitoring device, and when the detection value is lower than the preset rubber belt tension lower limit value, the main controller controls the electro-hydraulic push rod 1 to start;

[0044] 4) the extension end of the electro-hydraulic push rod 1 is extended under the control of the main controller, and moves a set stroke unit in cooperation with the travel switch 2;When the detection value of the rubber belt tension monitoring device is higher than the preset rubber belt tension lower limit value, the main controller controls the electro-hydraulic push rod 1 to stop working;

[0045] 5) after the electro-hydraulic push rod 1 stops working, the swing arm 3 loses driving force, the tension of the rubber belt 13 makes the swing arm 3 reverse swing to drive the ratchet to reverse, and the pawl is clamped in the positioning groove in the ratchet, so that the swing arm 3 realizes position self-locking, thereby keeping the tension of the rubber belt 13 within the preset rubber belt tension range;

[0046] 6) the tension value of rubber belt 13 is detected in real time through the rubber belt tension monitoring device, and when the detection value is higher than the preset rubber belt tension upper limit value, the main controller sends instructions to the clutch controller 10 and the electro-hydraulic push rod 1, and the pawl is controlled by the clutch controller 10 to be separated from the positioning groove in the ratchet, and the extension end of the electro-hydraulic push rod 1 is retracted, and moves a set stroke unit in cooperation with the travel switch 2;

[0047] 7) repeat steps 3) to 6) when the belt conveyor works, so that the tension of the rubber belt 13 is always kept within the set rubber belt tension range value.

[0048] When the stroke of the electro-hydraulic push rod 1 reaches the preset maximum stroke of the stroke switch 2, and the detection value of the belt tension monitoring device reaches the preset lower limit value of the belt tension, the main controller alarms, and the belt conveyor stops working after the on-site worker confirms; the drive end drum 6 returns to the initial working position by manually issuing an instruction to the main controller and controlling the tension self-locking mechanism to disengage through the clutch controller 10, at this time the belt 13 is in a relaxed state, and the belt conveyor can be put into use again after the belt 13 is glued or replaced.

[0049] When the electro-hydraulic push rod 1 acts, the multiple sets of swing assemblies are driven to act synchronously through the connecting rod I and the connecting rod II when the swing tensioning device with multiple sets of swing assemblies is adopted; the belt tension value is detected in real time by the belt tension monitoring device arranged in any one set of swing assemblies.

[0050] The swing tensioning device can fold the return belt of the belt conveyor, tension the belt, and make the belt tension meet the working requirements of the belt conveyor. Compared with the existing belt tensioning device, the head wheel and the tail wheel position of the belt conveyor can be kept fixed, the action of the electro-hydraulic push rod can be controlled through the belt tension and the swing rod stroke, and the automatic adjustment of the belt pretension can be realized. The swing tensioning device can be set in groups, and the belt tensioning stroke of the belt conveyor can be doubled.

[0051] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A short distance belt conveyor swing tensioner, provided below the belt conveyor; characterized in that, The device comprises an electro-hydraulic push rod, a swing arm, a swing arm roller assembly, a redirection roller one and a redirection roller two; the swing arm roller assembly is composed of a driving end roller, a middle roller and a swing end roller; the electro-hydraulic push rod is arranged on one side of the swing arm, the driving end roller is arranged at the driving end of the swing arm, and the roller shaft of the driving end roller is hinged to the extension end of the electro-hydraulic push rod; the middle roller is arranged at the middle of the swing arm, and the roller shaft of the middle roller is hinged to the supporting leg of the belt conveyor frame; the swing end roller is arranged at the swing end of the swing arm; the redirection roller one is arranged upstream of the swing tensioning device of the belt return path, and the redirection roller two is arranged downstream of the swing tensioning device of the belt return path; the belt is sequentially wound around the head wheel, the redirection roller one, the swing end roller, the middle roller, the driving end roller, the redirection roller two and the tail wheel to form a closed loop structure.

2. A short distance belt conveyor swing tensioner according to claim 1, characterized in that The device further comprises a control system; the control system is composed of a main controller, a travel switch, a belt tension monitoring device and a clutch controller; the travel switch is arranged on the outside of the extension end of the electro-hydraulic push rod, and the belt tension monitoring device is arranged on the roller shaft of the swing end roller; a tensioning self-locking mechanism is arranged between the middle roller and the swing arm, the tensioning self-locking mechanism has a clutch function and is controlled by the clutch controller; the signal output ends of the travel switch and the belt tension monitoring device are respectively connected to the control system, and the control system is additionally connected to the control ends of the electro-hydraulic push rod and the clutch controller.

3. A short distance belt conveyor swing tensioning device according to claim 2, characterized in that The tensioning self-locking mechanism is a ratchet and pawl self-locking mechanism, and the clutch controller is an electromagnetic controller; the electromagnetic controller is used to control the pawl to be detached from the corresponding positioning groove in the ratchet along the radial direction or the axial direction.

4. A short distance belt conveyor swing tensioner according to claim 1, characterized in that The electro-hydraulic push rod is arranged on a push rod support.

5. A short distance belt conveyor swing tensioner as claimed in claim 1, characterized in that, The driving end roller has an initial working position, and a driving end roller support is arranged on the supporting leg of the belt conveyor frame at a position corresponding to the initial working position of the driving end roller; when the driving end roller is in the initial working position, the corresponding roller shaft is tightly arranged in the groove of the driving end roller support.

6. A short distance belt conveyor swing tensioner as claimed in claim 1, characterized in that A middle roller support is arranged on the supporting leg of the belt conveyor frame, and the roller shaft of the middle roller is hinged to the middle roller support.

7. A short distance belt conveyor swing tensioner as claimed in claim 1, characterized in that The swing arm and the swing arm roller assembly are arranged in groups to form a swing assembly, a plurality of swing assemblies are arranged in the swing tensioning device, the roller shafts of the driving end rollers in the plurality of swing assemblies are connected through a connecting rod one, and the roller shafts of the swing end rollers in the plurality of swing assemblies are connected through a connecting rod two; the plurality of swing assemblies are driven to move synchronously by one electro-hydraulic push rod; after the belt is wound around the head wheel and the redirection roller one, the belt is sequentially wound around the swing end rollers, the middle rollers and the driving end rollers in the swing assemblies, and then the belt is wound around the redirection roller two and the tail wheel to form a closed loop structure.

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