A rubber conveyor belt resistance test device

Abstract

The present invention discloses a rubber conveyor belt resistance test device, which belongs to the field of resistance measurement devices, and includes a belt cover plate fixedly connected to the bottom of a suspension component, a spacing component fixedly connected to the bottom of the belt cover plate, and an arc-shaped contact plate provided at the bottom of the spacing component. The present invention provides an anti-seismic plate, and when the anti-seismic plate contacts the conveyor belt with a small resistance point at the bottom of the arc-shaped contact plate and contracts, the arc-shaped contact plate can cooperate with a reaction plate and a ventilation hole to repeatedly support the side of the central rotating arm rod in a piston motion. First, it can prevent the arc-shaped contact plate from contracting quickly and hitting the conveyor belt to produce a large vibration that affects the accuracy of subsequent resistance detection results. Second, it can reduce the vibration amplitude of the arc-shaped contact plate to reduce the impact on the piston resistance rod, and avoid the resistance detection spring connected to the piston resistance rod from being affected by vibration, resulting in large fluctuations in the detection results, thereby affecting the average value of the detection results.

Description

Technical Field

[0001] The invention relates to the technical field of resistance measuring devices, and in particular to a resistance testing device for a rubber conveyor belt. Background Art

[0002] Rubber belts are widely used in the transportation of objects due to their excellent physical properties. When testing the resistance of rubber conveyor belts, sliding friction is often used as the maximum static friction. The existing resistance testing device pulls the counterweight at a constant speed, and reflects the resistance on the surface of the rubber belt according to the dynamic changes of the tension testing device connected to the counterweight. Due to the limitations of the conveyor belt manufacturing process, the smoothness and flatness of the conveyor belt surface are different. When testing the resistance, the conveyor belt needs to be rotated at a constant speed to use the sliding friction of the counterweight per unit area as the maximum static friction. Therefore, the resistance value at each position on the conveyor belt surface is different, which causes the counterweight to shake during movement. When the counterweight contacts conveyor belts with different resistance surfaces, the resistance detection device will experience numerical fluctuations when the counterweight shakes, thereby affecting the accuracy of the detection results of the resistance detection device. Summary of the invention

[0003] The purpose of the present invention is to solve the problem in the prior art that the counterweight block will shake during movement due to the different smoothness and flatness of the conveyor belt surface, thereby affecting the accuracy of the detection result of the resistance detection device, and to propose a rubber conveyor belt resistance test device.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A rubber conveyor belt resistance test device comprises a belt cover plate fixedly connected to the bottom of a suspension assembly, the bottom of the belt cover plate is fixedly connected to a spacing assembly, the bottom of the spacing assembly is provided with an arc-shaped contact plate, the thickness of the arc-shaped contact plate gradually decreases from the bottom end to the top end, the top of the arc-shaped contact plate is connected to the spacing assembly through a front-end rotating assembly and a terminal pressing assembly, the inner wall of the front-end rotating assembly is hinged with a connecting frame through an axis, one end of the connecting frame is fixed with a piston resistance rod, one end of the piston resistance rod is sleeved with an air plug shell, a resistance detection spring is fixedly connected between the inner wall of one end of the air plug shell and the piston resistance rod, and the air plug shell has a plurality of holes on the inner wall of the piston resistance rod. One end of the plug shell is provided with a plurality of ventilation holes in a circular array, a reaction force plate is inserted into the inner wall of the air plug shell at one end of the ventilation hole, a return spring is fixed between one side of the reaction force plate and the inner wall of the air plug shell, an air supply component is fixedly connected to the end of the air plug shell located at the reaction force plate, one end of the air supply component passes through the connecting frame and is fixedly connected to a fixed box, a downward pressure rod is fixed to the top inner wall of the fixed box, a touch plate is fixed to the side of the downward pressure rod, a push rod is tightly fitted on the inclined surface of one end of the touch plate, an anti-seismic plate is fixed to one end of the push rod, and a tension spring is fixedly connected to the side of the push rod and one end of the fixed box.

[0006] Preferably, a support arm is fixedly connected to one side of the fixed box, and transverse axis rods are inserted into both sides of the air plug shell.

[0007] Preferably, the suspension assembly comprises a front arm bar and a rear arm bar fixed to both sides of the top end of the belt cover plate, the top ends of the front arm bar and the rear arm bar are hinged with a connecting block through an axis, and a pressure assembly is provided on the top of the connecting block.

[0008] Preferably, the pressure assembly includes a telescopic rod fixed to the top of the connecting block, the top of the telescopic rod is sleeved with a pressure tube, the top inner wall of the pressure tube is threadedly connected with a pressure increasing and decreasing bolt, and two symmetrically arranged external plates are fixed to the outside of the pressure tube.

[0009] Preferably, the front end rotating assembly includes a central pivot arm rod hinged to both sides of the upper surface of the bottom end of the arc-shaped contact plate through an axis, a front axle rod is inserted into the top end of the central pivot arm rod, a cross bar is fixed to one side of the central pivot arm rod, and the inner wall of the groove of the cross bar is hinged to one end of the connecting frame through an axis.

[0010] Preferably, the terminal pressing assembly comprises a pressing rotating rod hinged to both sides of the upper surface of the top end of the arc-shaped contact plate through an axis, and the top end of the pressing rotating rod is plugged with the terminal shaft.

[0011] Preferably, the air supply assembly comprises a conical air hood fixed to the outside of a port of the air plug housing, an air guide tube is fixed to one end of the conical air hood, and one end of the air guide tube is fixed to the top of the fixed box.

[0012] Preferably, the spacer assembly includes a connecting suspension plate fixed to the bottom of the belt cover plate, a spacer cover is fixed to the bottom of the connecting suspension plate, and one end of the front axle rod, the downward pressure rotating rod, the support arm and the horizontal axis rod are all fixed to the inner wall of the spacer cover.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention provides an anti-vibration plate. When the bottom of the arc-shaped contact plate contacts the small resistance point of the conveyor belt and contracts, the arc-shaped contact plate can cooperate with the reaction plate and the ventilation hole to repeatedly support the side of the central rotating arm rod in a piston motion. Firstly, it can prevent the arc-shaped contact plate from quickly contracting and hitting the conveyor belt to generate large vibrations that affect the accuracy of subsequent resistance detection results. Secondly, it can reduce the vibration amplitude of the arc-shaped contact plate to reduce the impact on the piston resistance rod, and avoid the resistance detection spring connected to the piston resistance rod from being affected by vibration, resulting in large fluctuations in the detection results, thereby affecting the average value of the detection results.

[0015] 2. The present invention sets a ventilation hole, which can ensure smooth replacement of gas in the gas plug shell when the piston resistance rod slides smoothly, and can drive the reaction plate to move when the piston resistance rod moves greatly, thereby repeatedly pushing the anti-vibration plate to the side of the center rotating arm rod to offset the range of the center rotating arm rod shaking, so as to reduce the impact on the accuracy of conveyor belt surface resistance detection.

[0016] 3. The present invention sets a reaction force plate. When the arc-shaped contact plate transitions from a high resistance surface to a low resistance surface and rotates rapidly, the reaction force plate will move under the action of the piston resistance rod, thereby pushing the anti-vibration plate to reduce the movement range and vibration of the arc-shaped contact plate, so as to improve the accuracy of the detection result of the resistance detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a rubber conveyor belt resistance test device proposed by the present invention;

[0018] Figure 2 A schematic cross-sectional structure diagram of a rubber conveyor belt resistance test device proposed by the present invention;

[0019] Figure 3 A schematic diagram of the explosion structure of a rubber conveyor belt resistance test device proposed by the present invention;

[0020] Figure 4 This is a schematic structural diagram of a center rotating arm of a rubber conveyor belt resistance test device proposed by the present invention;

[0021] Figure 5 A schematic diagram of the cross-sectional structure of a rubber conveyor belt resistance test device at a spacer cover proposed by the present invention;

[0022] Figure 6 A schematic cross-sectional structure diagram of the air plug housing of a rubber conveyor belt resistance test device proposed by the present invention;

[0023] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0024] In the figure: 1. belt cover plate; 2. arc contact plate; 3. connecting frame; 4. piston resistance rod; 5. air plug shell; 6. resistance detection spring; 7. ventilation hole; 8. reaction force plate; 9. reset spring; 10. fixed box; 11. down-pressure rod; 12. touch plate; 13. propulsion rod; 14. anti-vibration plate; 15. tension spring; 16. support arm; 17. transverse axis rod; 18. front arm rod; 19. rear arm rod; 20. connecting block; 21. telescopic rod; 22. pressure cylinder; 23. pressure increase and decrease bolt; 24. external plate; 25. center rotating arm rod; 26. front axle rod; 27. cross bar; 28. down-pressure rotating rod; 29. ​​end shaft; 30. conical air cover; 31. air guide tube; 32. connecting suspension plate; 33. spacer cover. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example, see Figures 1 to 7 A rubber conveyor belt resistance testing device includes a belt cover plate 1 fixedly connected to the bottom of a suspension assembly. Further, the suspension assembly includes a front arm rod 18 and a rear arm rod 19 fixed on both sides of the top of the belt cover plate 1. The top ends of the front arm rod 18 and the rear arm rod 19 are hinged with a connecting block 20 through an axis.

[0029] The further advantage of adopting the above method is that the belt cover plate 1 and the connecting block 20 are connected by the front arm rod 18 and the rear arm rod 19 to ensure the stability of the belt cover plate 1 pressing on the surface of the conveyor belt, and avoid the connection position being compressed and bent to affect the stability of the pressure on the conveyor belt;

[0030] A pressure assembly is provided at the top of the connecting block 20. Furthermore, the pressure assembly includes a telescopic rod 21 fixed to the top of the connecting block 20. A pressure tube 22 is sleeved on the top of the telescopic rod 21. A pressure increasing and decreasing bolt 23 is threadedly connected to the inner wall of the top of the pressure tube 22. Two symmetrically arranged external plates 24 are fixed to the outer side of the pressure tube 22.

[0031] A further advantage of adopting the above method is that the telescopic rod 21 can be driven to rise or fall by rotating the pressure increasing and decreasing bolt 23, so as to change the pressure of the bottom end of the arc-shaped contact plate 2 contacting the conveyor belt.

[0032] The bottom of the belt cover plate 1 is fixedly connected with a spacer assembly. Furthermore, the spacer assembly includes a connecting suspension plate 32 fixed to the bottom of the belt cover plate 1, a spacer cover 33 is fixed to the bottom of the connecting suspension plate 32, and one end of the front axle rod 26, the downward pressure rotating rod 28, the support arm 16 and the horizontal axis rod 17 are all fixed to the inner wall of the spacer cover 33.

[0033] A further advantage of adopting the above method is that multiple arc-shaped contact plates 2 can contact the conveyor belt at the same time through the spacer cover 33, and the conveyor belt can be detected at multiple points based on unit area, thereby facilitating the detection of resistance values ​​at different positions on the conveyor belt surface.

[0034] An arc-shaped contact plate 2 is provided at the bottom of the spacing component, and the thickness of the arc-shaped contact plate 2 gradually decreases from the bottom end to the top end. The top of the arc-shaped contact plate 2 is connected to the spacing component through a front-end rotating component and an end pressing component. Furthermore, the front-end rotating component includes a central pivot arm rod 25 hinged to both sides of the upper surface of the bottom end of the arc-shaped contact plate 2 through an axis, a front axis rod 26 is inserted at the top end of the central pivot arm rod 25, a cross bar 27 is fixed to one side of the central pivot arm rod 25, and the inner wall of the groove of the cross bar 27 is hinged to one end of the connecting frame 3 through an axis.

[0035] A further advantage of adopting the above method is that the central rotating arm 25 can cause the bottom end of the arc contact plate 2 to rotate around the central axis of the spacer cover 33, so as to facilitate the downward pressing of the rotating rod 28 to drive the top end of the arc contact plate 2 to be driven by the central rotating arm 25 to rotate and then move downward, so that after the arc contact plate 2 is driven to rotate at a uniform speed by the conveyor belt, the height of the bottom surface of the arc contact plate 2 is always on the same horizontal plane.

[0036] Furthermore, the terminal pressing assembly includes a pressing rod 28 hinged to both sides of the upper surface of the top end of the arc-shaped contact plate 2 through an axis, and a terminal shaft 29 is inserted into the top end of the pressing rod 28 .

[0037] A further advantage of adopting the above method is that the downward pressing rod 28 can drive the top of the arc contact plate 2 to press downward when the bottom end of the arc contact plate 2 is driven to rotate by the forearm rod 18, so as to detect conveyor belts with different resistances by changing the pressure of the arc contact plate 2 on the conveyor belt.

[0038] The inner wall of the front end rotating assembly is hinged with a connecting frame 3 through an axis, a piston resistance rod 4 is fixed to one end of the connecting frame 3, and an air plug shell 5 is sleeved on one end of the piston resistance rod 4, a resistance detection spring 6 is fixedly connected between the inner wall of one end of the air plug shell 5 and the piston resistance rod 4, and one end of the air plug shell 5 is provided with a plurality of ventilation holes 7 in a circular array, a reaction force plate 8 is inserted into the inner wall of the air plug shell 5 at one end of the ventilation hole 7, a reset spring 9 is fixed between one side of the reaction force plate 8 and the inner wall of the air plug shell 5, and an air supply assembly is fixedly connected to one end of the air plug shell 5 located at the reaction force plate 8. Furthermore, the air supply assembly includes a conical air hood 30 fixed to the outside of a port of the air plug shell 5, an air guide pipe 31 is fixed to one end of the conical air hood 30, and one end of the air guide pipe 31 is fixed to the top of the fixed box 10.

[0039] A further advantage of adopting the above method is that the piston resistance rod 4 moves quickly inside the air plug shell 5, and a large air pressure is generated inside the air plug shell 5 because the air exchange hole 7 cannot quickly discharge the gas, which will drive the reaction force plate 8 to move. The air guide pipe 31 then transports the gas squeezed out by the reaction force plate 8 in the air plug shell 5 to the inside of the fixed box 10, thereby driving the touch plate 12 connected to the down-pressing rod 11 to move downward and push the anti-vibration plate 14 to the side of the center rotating arm rod 25, thereby gradually reducing the range of movement of the center rotating arm rod 25 and reducing the vibration amplitude of the center rotating arm rod 25 after being hit by the anti-vibration plate 14, thereby reducing the influence on the resistance detection spring 6, improving the accuracy and stability of the resistance detection result of the detection device, and the size of the surface resistance value of the conveyor belt can be obtained through the telescopic length of the resistance detection spring 6.

[0040] One end of the air supply assembly passes through the connecting frame 3 and is fixedly connected to a fixed box 10, one side of the fixed box 10 is fixedly connected to a support arm 16, and horizontal axis rods 17 are inserted on both sides of the air plug shell 5. A downward pressure rod 11 is fixed to the inner wall of the top end of the fixed box 10, and a touch plate 12 is fixed to the side of the downward pressure rod 11. The inclined surface of one end of the touch plate 12 is tightly fitted with a push rod 13, and an anti-vibration plate 14 is fixed to one end of the push rod 13. A tension spring 15 is fixedly connected to the side of the push rod 13 and one end of the fixed box 10. Compared with the traditional spring shock absorption method, the pneumatic shock absorption of this solution will reduce the vibration amplitude.

[0041] The present invention is used as Figure 1 As shown, rotating the pressure increasing and decreasing bolt 23 can drive the telescopic rod 21 connected to the pressure cylinder 22 to move up and down, thereby changing the pressure as shown in FIG. Figure 3 The pressure value of the bottom of the arc-shaped contact plate 2 on the conveyor belt surface is shown;

[0042] During the test, the conveyor belt is rotated at a constant speed. Figure 4 The bottom of the arc contact plate 2 shown is pressed against the surface of the conveyor belt. During the uniform rotation of the conveyor belt, the arc contact plate 2 is driven to rotate partially in the direction of the conveyor belt movement. When the arc contact plate 2 contacts a point with large resistance on the surface of the conveyor belt, the arc contact plate 2 is driven to continue rotating. At this time, the piston resistance rod 4 is driven to compress the resistance detection spring 6 through the center rotating arm rod 25, indicating that the resistance is large. On the contrary, when the arc contact plate 2 contacts a point with small resistance on the surface of the conveyor belt, the piston resistance rod 4 is driven to stretch the resistance detection spring 6 through the center rotating arm rod 25.

[0043] When the central rotating arm 25 is in transition from the large resistance point to the small resistance point, it will move rapidly under the drive of the arc-shaped contact plate 2. Figure 6 and Figure 7As shown, the piston resistance rod 4 moves rapidly toward the direction of the reaction force plate 8. Since the exhaust speed of the air exchange hole 7 is limited, the air pressure inside the air plug shell 5 increases, which further pushes the reaction force plate 8 to move, and sends the gas inside the air plug shell 5 into the interior of the fixed box 10 through the air guide pipe 31. At this time, the lower pressure rod 11 moves downward under the influence of the air pressure, driving the touch plate 12 to squeeze the push rod 13, so that the anti-seismic plate 14 hits the center rotating arm rod 25. After being hit by the anti-seismic plate 14, the center rotating arm rod 25 will move in the opposite direction and continue to move toward the anti-seismic plate 14. At this time, the ventilation hole 7 can limit the movement of the central rotating arm 25 due to the limited ventilation volume, and after the central rotating arm 25 is set to limit the rotation amplitude as mentioned above, the fluctuation range of the resistance detection spring 6 after being squeezed can be reduced, which is beneficial for the arc contact plate 2 to continue to detect the resistance on the surface of the conveyor belt, and avoid the subsequent resistance detection value being affected by the large shaking amplitude of the arc contact plate 2. On the contrary, when the central rotating arm 25 moves rapidly toward the anti-seismic plate 14, the above-mentioned action will continue to be repeated to push the anti-seismic plate 14 toward the center rotating arm 25, thereby reducing the activity range of the arc contact plate 2.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rubber conveyor belt resistance test device, comprising a belt cover plate (1) fixedly connected to the bottom of a suspension assembly, characterized in that: The bottom of the belt cover plate (1) is fixedly connected to a spacing component, the bottom of the spacing component is provided with an arc-shaped contact plate (2), the thickness of the arc-shaped contact plate (2) gradually decreases from the bottom to the top, the top of the arc-shaped contact plate (2) is connected to the spacing component via a front-end rotating component and a terminal pressing component, the inner wall of the front-end rotating component is hinged with a connecting frame (3) via an axis, one end of the connecting frame (3) is fixed with a piston resistance rod (4), one end of the piston resistance rod (4) is sleeved with an air plug shell (5), a resistance detection spring (6) is fixedly connected between the inner wall of one end of the air plug shell (5) and the piston resistance rod (4), one end of the air plug shell (5) is provided with a plurality of ventilation holes (7) in a ring array, the air plug shell (5) is located at the ventilation hole. A reaction force plate (8) is inserted into the inner wall of one end of the air hole (7), a return spring (9) is fixed between one side of the reaction force plate (8) and the inner wall of the air plug shell (5), an air supply component is fixedly connected to the end of the air plug shell (5) located at the reaction force plate (8), one end of the air supply component passes through the connecting frame (3) and is fixedly connected to a fixed box (10), a downward pressure rod (11) is fixed to the inner wall of the top end of the fixed box (10), a touch plate (12) is fixed to the side of the downward pressure rod (11), a propulsion rod (13) is tightly fitted on the inclined surface of one end of the touch plate (12), an anti-vibration plate (14) is fixed to one end of the propulsion rod (13), and a tension spring (15) is fixedly connected to the side of the propulsion rod (13) and one end of the fixed box (10).

2. A rubber conveyor belt resistance test device according to claim 1, characterized in that: A support arm (16) is fixedly connected to one side of the fixed box (10), and transverse shaft rods (17) are inserted into both sides of the air plug housing (5).

3. A rubber conveyor belt resistance test device according to claim 1, characterized in that: The suspension assembly comprises a front arm rod (18) and a rear arm rod (19) fixed to both sides of the top end of the belt cover plate (1); the top ends of the front arm rod (18) and the rear arm rod (19) are hingedly connected to a connecting block (20) via an axis; and a pressure assembly is provided on the top of the connecting block (20).

4. A rubber conveyor belt resistance test device according to claim 3, characterized in that: The pressure-applying assembly comprises a telescopic rod (21) fixed to the top of a connecting block (20); a pressure-applying tube (22) is sleeved on the top of the telescopic rod (21); a pressure-increasing and decreasing bolt (23) is threadedly connected to the inner wall of the top of the pressure-applying tube (22); and two symmetrically arranged external plates (24) are fixed to the outer side of the pressure-applying tube (22).

5. A rubber conveyor belt resistance test device according to claim 2, characterized in that: The front end rotating assembly comprises a central rotating arm rod (25) hinged to both sides of the upper surface of the bottom end of the arc-shaped contact plate (2) through an axis, a front axis rod (26) is inserted into the top end of the central rotating arm rod (25), a cross bar (27) is fixed to one side of the central rotating arm rod (25), and the inner wall of the groove of the cross bar (27) is hinged to one end of the connecting frame (3) through an axis.

6. A rubber conveyor belt resistance test device according to claim 5, characterized in that: The terminal pressing assembly comprises a pressing rotating rod (28) hinged to both sides of the upper surface of the top end of the arc-shaped contact plate (2) via an axis, and a terminal shaft (29) is inserted into the top end of the pressing rotating rod (28).

7. A rubber conveyor belt resistance test device according to claim 6, characterized in that: The air supply assembly comprises a conical air hood (30) fixed to the outside of a port of an air plug housing (5), an air guide tube (31) being fixed to one end of the conical air hood (30), and one end of the air guide tube (31) being fixed to the top end of a fixing box (10).

8. A rubber conveyor belt resistance test device according to claim 7, characterized in that: The spacing assembly comprises a connecting hanging plate (32) fixed to the bottom of the belt cover plate (1), a spacing cover (33) is fixed to the bottom of the connecting hanging plate (32), and one end of the front axle rod (26), the downward pressing rotating rod (28), the support arm (16) and the transverse axis rod (17) are all fixed to the inner wall of the spacing cover (33).

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