A tensioning protection device for a coal conveying belt

Abstract

The application discloses a tension protection device for a coal conveying belt and belongs to the technical field of coal conveying belt protection. The tension protection device is characterized in that a buffer bottom plate with a buffering function is additionally arranged below a traditional weight tension device, guide side plates for vertically guiding a tension roller shaft are arranged on both sides of the upper end of the buffer bottom plate, the tension roller shaft cooperates with a counterweight hammer assembly to form a weight tension structure, when the belt is accidentally broken, the counterweight hammer assembly falls together with the tension roller shaft, in the falling process, the cooperation of the elastic sheet and the supporting belt pulls the falling tension roller shaft to play a first buffering action, which helps to reduce the falling speed of the counterweight hammer assembly, thereby reducing the impact force caused by the falling of the counterweight hammer assembly on the buffer bottom plate, and the buffer bottom plate with multiple buffer pads cooperates with a tension assembly to play a second buffering action on the counterweight hammer assembly falling on the end face of the buffer bottom plate, effectively reducing the damage degree of the falling weight to itself and surrounding facilities, and improving the safety.

Description

Technical Field

[0001] This invention relates to the field of coal conveyor belt protection technology, and more specifically, to a tensioning protection device for coal conveyor belts. Background Technology

[0002] Coal conveyor belts are used in coal conveying workshops of coal-fired power plants to transport coal. Over time, the belts can become loose, causing the conveyors to malfunction. Power plants typically install tensioning devices under the conveyor belt frame, using counterweights to tighten the belt and enable it to run in a circular motion under the drive of the drive unit.

[0003] The area beneath the counterweight tensioning device is usually hardened ground. If a conveyor belt breaks during the coal feeding process, the counterweight will fall due to gravity, causing significant equipment damage or damaging surrounding facilities.

[0004] To address this, we propose a tensioning protection device for coal conveyor belts. By installing a buffer structure below the traditional tensioning device, the damage caused by the falling hammer is effectively reduced, thus improving safety. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of significant equipment damage or damage to surrounding facilities caused by the falling counterweight when a belt breaks during the coal conveying process. Compared with existing technologies, this invention provides a tensioning protection device for coal conveying belts. By adding a buffer base plate below the traditional counterweight tensioning device, and setting guide side plates on both sides of the upper part of the buffer base plate for vertically guiding the tensioning roller shaft, when the belt breaks unexpectedly, the counterweight assembly and the tensioning roller shaft fall. The elastic sheet and the supporting belt work together to provide primary buffering for the fall of the tensioning roller shaft, which helps to reduce the falling speed of the counterweight assembly, thereby reducing the impact force caused by the counterweight assembly falling onto the buffer base plate. The buffer base plate with multiple buffer pads, together with the tensioning assembly, provides secondary buffering for the counterweight assembly, effectively reducing the damage to itself and surrounding facilities caused by the falling counterweight and improving safety.

[0006] The objective of this invention can be achieved through the following technical solution: a tensioning protection device for a coal conveyor belt, comprising a pair of positioning side plates fixed on the ground, each of the pair of positioning side plates being fixedly connected to a guide side plate, a tensioning roller shaft for belt tensioning being installed between the top ends of the pair of guide side plates, and a steering roller shaft for belt guidance being provided on both sides of the top of the tensioning roller shaft, a guide post extending to both ends of the tensioning roller shaft being inserted through the tensioning roller shaft, a guide groove being provided on each of the pair of guide side plates along its vertical direction, a guide disc being fixedly sleeved on both ends of the guide post through a pair of guide grooves and extending outward, and connecting rods being fixedly connected to the bottom walls on both sides of the guide post at the outer end of the tensioning roller shaft, and a counterweight assembly being fixedly installed at the bottom end of the pair of connecting rods;

[0007] A buffer base plate located below the counterweight assembly is slidably connected between a pair of positioning side plates. Multiple buffer pads in contact with the ground are distributed at the bottom of the buffer base plate. Tensioning components that are fixedly connected to the ground are fixedly connected to both the left and right end walls of the buffer base plate. A support belt is sleeved and connected to the lower end of the guide column located inside the guide groove. Hollow grooves are opened in the vertical direction inside both the left and right ends of the guide side plate. Elastic sheets are fixedly connected to both sides of the upper end of the support belt through the top of the hollow groove and extending downward. The bottom end of the elastic sheet is fixedly connected to the bottom wall of the hollow groove.

[0008] Furthermore, the counterweight assembly consists of multiple single-hole fitting counterweight plates and double-hole fitting counterweight plates that are staggered and inserted into each other. The single-hole fitting counterweight plates are fixedly connected to the bottom ends of a pair of connecting rods.

[0009] Furthermore, the single-port counterweight plate has one fitting port, and the double-port counterweight plate has two symmetrically distributed fitting ports. The end walls of the single-port and double-port counterweight plates at the fitting ends, as well as the inner end walls of the fitting ports, are equipped with magnetic layers that attract each other. This enables magnetic positioning of the single-port and double-port counterweight plates after they are fitted together, improving the stability of the fitting connection. By fitting different numbers of single-port and double-port counterweight plates together, the magnitude of the counterweight force can be changed, thereby obtaining different tension forces to adjust the tension of the belt. Note that during counterweighting, both the top and bottom are single-port counterweight plates, which improves the overall balance of the counterweight assembly and enhances the overall tension of the belt.

[0010] Furthermore, the tensioning assembly includes a fixed base fixedly connected to the ground, with a tensioning cylinder rotatably installed inside the fixed base. One end of the tensioning cylinder is fixedly connected to the inner wall of the fixed base via a torsion spring. A traction cable is wound around the tensioning cylinder, and the other end of the traction cable is fixedly connected to the buffer base plate. When the counterweight assembly falls accidentally, the counterweight assembly falls onto the buffer base plate, and the buffer base plate and the buffer pad work together to provide primary buffer protection. The traction cable, which has a traction and tensioning effect, helps to improve the stability of the buffer base plate when it deforms up and down, thereby improving the buffer performance of the buffer base plate.

[0011] Furthermore, the vertical length of the hollow groove is greater than the vertical length of the guide groove, and the initial length of the support belt inside the hollow groove is greater than the vertical length of the guide groove. The support belt is long enough that after the tension roller shaft falls accidentally with the counterweight assembly, the guide column slides down along the end wall of the guide groove and, under the combined traction of the elastic sheet and the support belt, buffers the fall of the tension roller shaft, which helps to reduce the falling speed of the counterweight assembly, thereby reducing the impact force caused by the counterweight assembly falling on the upper surface of the buffer base plate.

[0012] Furthermore, an air cushion located inside a pair of positioning side plates is fixedly installed on the top of the buffer base plate, and an air pump connected to the air cushion is provided on the outside of the positioning side plates.

[0013] Furthermore, in its initial uninflated state, the upper surface of the air cushion is concave downwards, reducing the overall area of ​​the air cushion and preventing the tensioning protection device from snagging or bumping during normal use.

[0014] Furthermore, a tension detector is installed at the bottom of a pair of elastic plates located inside the guide side plate and is fixedly connected to the bottom wall of the hollow groove. A controller connected to the tension detector is located on one side of the positioning side plate. The controller is also connected to the air pump. By installing a tension detector below the elastic plate, when the belt breaks unexpectedly, the counterweight assembly drives the tension roller to fall rapidly. At this time, the tension detector detects that the tension value is greater than the preset safety range value and transmits the danger signal to the controller. The controller controls the air pump to quickly inflate the air cushion. The inflated air cushion further improves the buffering effect on the counterweight assembly and reduces the impact on the buffer base plate, thereby providing further protection for the ground and surrounding facilities.

[0015] Compared with the prior art, the advantages of this invention are:

[0016] (1) This solution adds a buffer base plate with a buffering function below the traditional counterweight tensioning device, and sets guide side plates on both sides of the upper end of the buffer base plate for vertically guiding the tensioning roller shaft. The tensioning roller shaft and the counterweight assembly cooperate to form a counterweight tensioning structure. When the belt breaks accidentally, the counterweight assembly and the tensioning roller shaft fall. During the fall, the elastic sheet and the supporting belt cooperate to provide a primary buffering effect on the fall of the tensioning roller shaft, which helps to reduce the falling speed of the counterweight assembly, thereby reducing the impact force caused by the counterweight assembly falling on the upper end of the buffer base plate. The buffer base plate with multiple buffer pads, together with the tensioning assembly, provides a secondary buffering effect on the counterweight assembly falling to its end face, effectively reducing the damage to itself and the surrounding facilities caused by the fall of the counterweight, and improving safety.

[0017] (2) This solution uses a tension detector installed under the elastic sheet. When the belt breaks unexpectedly, the counterweight assembly drives the tension roller to fall quickly. At this time, the tension detector detects the danger signal and transmits the signal to the controller. The controller controls the air pump to quickly inflate the air cushion. The inflated air cushion further improves the buffering effect of the counterweight assembly and reduces the impact force of the counterweight assembly on the buffer base plate, thus providing further protection for the ground and surrounding facilities. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure at the junction of the tension roller shaft and the counterweight assembly of the present invention;

[0020] Figure 3 This is a schematic diagram of the bottom structure of the buffer base plate of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure at the junction of the buffer base plate and the tensioning assembly of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the inflatable pad of the present invention;

[0023] Figure 6 This is a partial cross-sectional view of the junction between the tension roller shaft and the guide side plate of the present invention;

[0024] Figure 7 This is an internal cross-sectional view of the guide side plate of the present invention;

[0025] Figure 8 This is a schematic diagram of the state of the belt when it breaks according to the present invention. Figure 1 ;

[0026] Figure 9 This is a schematic diagram of the state of the belt when it breaks according to the present invention. Figure 2 ;

[0027] Figure 10 This is a schematic diagram of the structure of the counterweight assembly of the present invention after it falls onto the inflatable pad.

[0028] Explanation of the labels in the diagram:

[0029] 1. Positioning side plate; 2. Guide side plate; 201. Guide groove; 202. Hollow groove; 3. Tensioning roller shaft; 31. Guide column; 32. Guide disc; 4. Steering roller shaft; 5. Connecting rod; 6. Counterweight assembly; 61. Single-port fitting counterweight plate; 62. Double-port fitting counterweight plate; 7. Buffer base plate; 8. Buffer pad; 9. Fixed seat; 10. Rotary drum; 101. Torsion spring; 11. Traction cable; 12. Inflatable cushion; 13. Air pump; 14. Support belt; 15. Elastic sheet; 16. Tensile testing instrument. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Example 1:

[0032] This invention discloses a tension protection device for coal conveyor belts. Please refer to [link / reference]. Figures 1-6 The system includes a pair of positioning side plates 1 fixed to the ground, each of which is fixedly connected to a guide side plate 2. A tensioning roller 3 for belt tensioning is installed between the top ends of the pair of guide side plates 2. The belt is driven and conveyed by an existing belt conveyor, which is prior art. The top two sides of the tensioning roller 3 are also provided with guide rollers 4 for belt guidance. The guide rollers 4 are rotated and positioned by an existing support frame. Guide posts 31 extending to both ends are inserted through the tensioning roller 3. Each of the pair of guide side plates 2 has a guide groove 201 along its vertical direction. Guide discs 32 are fixedly fitted at both ends of the guide posts 31 through the guide grooves 201 and extending outward. Connecting rods 5 are fixedly connected to the bottom walls on both sides of the guide posts 31 at the outer end of the tensioning roller 3. A counterweight assembly 6 is fixedly installed at the bottom of the pair of connecting rods 5. The counterweight assembly 6 and the pair of guide rollers 4 work together to tension and guide the belt on the belt conveyor.

[0033] Please see Figures 1-2 The counterweight assembly 6 consists of multiple single-hole fitting counterweight plates 61 and double-hole fitting counterweight plates 62, which are staggered and interlocked. The single-hole fitting counterweight plates 61 are fixedly connected to the bottom ends of a pair of connecting rods 5. Each single-hole fitting counterweight plate 61 has one fitting opening, and each double-hole fitting counterweight plate 62 has two symmetrically distributed fitting openings. The end walls of both the single-hole and double-hole fitting counterweight plates 61 and 62 at the fitting ends, as well as the inner end walls of the fitting openings, are provided with magnetic layers that attract each other, enabling the single-hole fitting counterweight plates 61 and 62 to interact with each other. The magnetic positioning after embedding improves the stability of the embedding connection. By embedding and cooperating different numbers of single-hole embedding counterweight plates 61 and double-hole embedding counterweight plates 62, the magnitude of the counterweight force can be changed, thereby obtaining different magnitudes of tension force to adjust the tightness of the belt. Note that when adding counterweight, the top and bottom can both be single-hole embedding counterweight plates 61, and the number of single-hole embedding counterweight plates 61 and double-hole embedding counterweight plates 62 set on the left and right should be kept as consistent as possible. This can improve the overall balance of the counterweight assembly 6 and improve the overall tension effect on the belt.

[0034] Please see Figure 1 and Figures 3-4A buffer base plate 7 located below the counterweight assembly 6 is slidably connected between a pair of positioning side plates 1. Sliding grooves are provided on the opposite end walls of the pair of positioning side plates 1 to slidably connect with the buffer base plate 7. Multiple buffer pads 8 in contact with the ground are distributed at the bottom of the buffer base plate 7. Tensioning components are fixedly connected to the ground on both the left and right end walls of the buffer base plate 7. The tensioning components include a fixed seat 9 fixedly connected to the ground, and a tensioning cylinder 10 is rotatably installed inside the fixed seat 9. One end of the tensioning cylinder 10 is connected to a torsion spring. 101 is fixedly connected to the inner wall of the fixed base 9. A traction cable 11 is wound around the tensioning cylinder 10. The other end of the traction cable 11 is fixedly connected to the buffer base plate 7. When the counterweight assembly 6 falls accidentally, the counterweight assembly 6 falls onto the buffer base plate 7. The buffer base plate 7 and the buffer pad 8 work together to provide primary buffer protection. The traction cable 11, which has a traction and tensioning effect, helps to improve the stability of the buffer base plate 7 when it deforms up and down, thereby improving the buffer performance of the buffer base plate 7.

[0035] Please see Figures 6-9 The lower end of the guide post 31 located inside the guide groove 201 is fitted with a support belt 14. Hollow grooves 202 are opened in the interior of both the left and right ends of the guide side plate 2 along its vertical direction. The upper ends of the support belt 14 pass through the top of the hollow groove 202 on both sides and extend downward to be fixedly connected to elastic sheets 15. The bottom end of the elastic sheet 15 is fixedly connected to the inner bottom wall of the hollow groove 202. The vertical length of the hollow groove 202 is greater than the vertical length of the guide groove 201. The initial length of the support belt 14 inside the hollow groove 202 is greater than the vertical length of the guide groove 201. The support belt 14 is long enough that after the tension roller 3 falls accidentally with the counterweight assembly 6, the guide post 31 slides down along the end wall of the guide groove 201 and, under the combined traction of the elastic sheet 15 and the support belt 14, buffers the fall of the tension roller 3, which helps to reduce the falling speed of the counterweight assembly 6, thereby reducing the impact force caused by the counterweight assembly 6 falling on the upper surface of the buffer base plate 7.

[0036] Example 2:

[0037] Based on Example 1, this embodiment adds a tension detector 16 to the bottom of the elastic sheet 15 and an air cushion 12 with an air pump 13 to the top of the buffer base plate 7. When the belt breaks unexpectedly, the change in tension generated by the movement of the counterweight assembly 6 and the supporting belt 14 is used to obtain a danger signal that the counterweight assembly 6 is about to fall. The controller then performs further buffering operations on the danger signal of the counterweight assembly 6 falling, as follows:

[0038] Please see Figure 1 and Figure 5An air cushion 12 located inside a pair of positioning side plates 1 is fixedly installed at the top of the buffer base plate 7. An air pump 13 connected to the air cushion 12 is provided on the outside of the positioning side plate 1. In order to improve the simplification of the facility, the technician can install the air pump 13 inside the buffer base plate 7, with the air inlet exposed outside the buffer base plate 7. In the initial state of not being inflated, the upper surface of the air cushion 12 is concave downward, reducing the overall area of ​​the air cushion 12, so that the tensioning protection device will not snag during normal use.

[0039] Please see Figures 6-10 A pair of elastic plates 15 located inside the guide side plate 2 are each equipped with a tension detector 16 at their bottom ends, which is fixedly connected to the bottom wall of the hollow groove 202. A controller connected to the tension detector 16 is provided on one side of the positioning side plate 1. The controller is also connected to the air pump 13. By setting the tension detector 16 below the elastic plate 15, when the belt breaks unexpectedly, the counterweight assembly 6 drives the tension roller 3 to fall rapidly. At this time, the tension detector 16 detects that the tension value is greater than the preset safety range value and transmits the danger signal to the controller. The controller controls the air pump 13 to quickly inflate the air cushion 12. The inflated air cushion 12 further improves the buffering effect on the counterweight assembly 6 and reduces the impact force of the counterweight assembly 6 on the buffer base plate 7, thereby providing further protection for the ground and surrounding facilities.

[0040] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A tensioning protection device for a coal conveyor belt, comprising a pair of positioning side plates (1) fixed to the ground, characterized in that: A pair of positioning side plates (1) are fixedly connected to guide side plates (2). A tensioning roller shaft (3) for belt tensioning is installed between the top ends of the pair of guide side plates (2). A steering roller shaft (4) for belt guidance is also provided on both sides of the top of the tensioning roller shaft (3). A guide post (31) extending to both ends of the tensioning roller shaft (3) is inserted through the tensioning roller shaft (3). A guide groove (201) is opened in the vertical direction of the pair of guide side plates (2). A guide plate (32) is fixedly sleeved on both ends of the guide post (31) through a pair of guide grooves (201) and extending outward. A connecting rod (5) is fixedly connected to the bottom wall of both sides of the guide post (31) located at the outer end of the tensioning roller shaft (3). A counterweight assembly (6) is fixedly installed at the bottom end of the pair of connecting rods (5). A buffer base plate (7) located below the counterweight assembly (6) is slidably connected between a pair of positioning side plates (1). Multiple buffer pads (8) in contact with the ground are distributed at the bottom of the buffer base plate (7). Tensioning components that are fixedly connected to the ground are fixedly connected to both the left and right end walls of the buffer base plate (7). A support belt (14) is sleeved and connected to the lower end of the guide column (31) located inside the guide groove (201). Hollow grooves (202) are opened in the left and right ends of the guide side plate (2) along its vertical direction. Elastic sheets (15) are fixedly connected to both sides of the upper end of the support belt (14) through the top of the hollow groove (202) and extending downward. The bottom end of the elastic sheet (15) is fixedly connected to the bottom wall of the hollow groove (202). The top of the buffer base plate (7) is also fixedly installed with an air cushion (12) located inside a pair of positioning side plates (1). An air pump (13) connected to the air cushion (12) is provided on the outside of the positioning side plate (1). In the initial state of the air cushion (12) when it is not inflated, its upper surface is concave downward. A pair of elastic sheets (15) located inside the guide side plate (2) are each equipped with a tensile tester (16) fixedly connected to the bottom wall of the hollow groove (202). A controller connected to the tensile tester (16) is provided on one side of the positioning side plate (1). The controller is also connected to the air pump (13).

2. The tensioning protection device for a coal conveyor belt according to claim 1, characterized in that: The counterweight assembly (6) is composed of multiple single-hole fitting counterweight plates (61) and double-hole fitting counterweight plates (62) that are staggered and inserted into each other. The single-hole fitting counterweight plate (61) is fixedly connected to the bottom end of a pair of connecting rods (5).

3. A tensioning protection device for a coal conveyor belt according to claim 2, characterized in that: The single-port fitting counterweight plate (61) has a fitting port, and the double-port fitting counterweight plate (62) has two fitting ports that are symmetrically distributed vertically. The end walls of the single-port fitting counterweight plate (61) and the double-port fitting counterweight plate (62) at the fitting end and the inner end walls of the fitting ports are all provided with magnetic layers that are magnetically attracted to each other.

4. A tensioning protection device for a coal conveyor belt according to claim 1, characterized in that: The tensioning assembly includes a fixed base (9) fixedly connected to the ground. A tensioning cylinder (10) is rotatably installed inside the fixed base (9). One end of the tensioning cylinder (10) is fixedly connected to the inner wall of the fixed base (9) through a torsion spring (101). A traction cable (11) is wound around the tensioning cylinder (10). The other end of the traction cable (11) is fixedly connected to the buffer base plate (7).

5. A tensioning protection device for a coal conveyor belt according to claim 1, characterized in that: The vertical length of the hollow groove (202) is greater than the vertical length of the guide groove (201), and the initial length of the supporting belt (14) inside the hollow groove (202) is greater than the vertical length of the guide groove (201).

Images