Tension detection device and tension control method for scraper chain of mining scraper conveyor

Abstract

The invention discloses a scraper chain tension detection device for a mining scraper conveyor and a tension control method. The scraper chain tension detection device comprises a connecting seat, a pressure detection assembly and a data processor, the connecting base is fixed to a U-shaped groove in the middle section of the machine tail side plate. The pressure detection assembly comprises a base, a floating block, a pressure sensor and a gland; the base is installed on the connecting base, one end of the gland is installed on the base, the other end of the gland extends towards one side of the scraper chain, so that the gland and the upper edge of the machine tail form a channel for the axe end of the scraper to run, the pressure sensor is installed on the lower end face of the gland, and the floating block is installed on the side, facing the scraper chain, of the base in a sliding mode. The floating block is located under the pressure sensor. And the data processor establishes communication connection with the pressure sensor. The positive pressure of the axe end of the scraper on the upper edge is detected through the pressure detection assembly installed on the upper edge of the machine tail, and then the tension condition of the scraper chain is judged by detecting the tension of the scraper chain on the upper portion of the machine tail and serves as the basis for adjusting the tension of the scraper chain.

Description

Technical Field

[0001] The present invention relates to the technical field of scraper conveyors, and particularly to a tension detection device and a tension control method for a scraper chain of a mine scraper conveyor. Background Art

[0002] During the coal transportation process in a coal mine, the scraper chain composed of a chain and scrapers running in the middle trough of the scraper conveyor in the underground working face of the coal mine gradually elongates under the action of force on the chain. The gap between the middle troughs also often changes. After the scraper chain elongates, it needs to be tensioned. Therefore, the telescopic tail of the scraper conveyor is designed as a telescopic structure, and the telescopic tail is tensioned by the configured telescopic push cylinder. With the development of coal mine intelligentization and the demand for efficient transportation of scraper conveyors, etc., it is required that the scraper conveyor can judge the state of the scraper chain in real time and can be tensioned in time to avoid problems such as hanging and jamming caused by the accumulation of the scraper chain, which affect the transportation efficiency.

[0003] At present, the tension of the scraper chain of the scraper conveyor is mainly judged by the pressure of the telescopic tail cylinder. Affected by the telescopic resistance of the telescopic tail and the change of the power of the tail drive motor, the pressure of the telescopic tail cylinder cannot directly reflect the tension of the scraper chain. Judging the tension of the scraper chain through the auxiliary means such as the change of the load of the scraper conveyor is an indirect judgment, and the deviation is relatively large. Summary of the Invention

[0004] In order to solve the technical problems existing in the above technology, in view of this, it is necessary to provide a tension detection device for a scraper chain of a mine scraper conveyor.

[0005] A tension detection device for a scraper chain of a mine scraper conveyor includes:

[0006] A connecting seat, fixed on the U-shaped groove in the middle section of the side plate of the tail;

[0007] A pressure detection assembly, including a base, a floating block, a pressure sensor, and a gland; the base is installed on the connecting seat, one end of the gland is installed on the base, and the other end of the gland extends towards the scraper chain side, so that a channel for the ax head of the scraper to run is formed between the gland and the upper edge of the tail. The pressure sensor is installed on the lower end surface of the gland. The floating block is slidably installed on the side of the base facing the scraper chain, and the floating block is located directly below the pressure sensor. When the ax head of the scraper squeezes the floating block, the floating block can move upward along the base to realize the top pressure on the pressure sensor, so as to detect the positive pressure of the scraper chain;

[0008] A data processor, which establishes a communication connection with the pressure sensor.

[0009] Preferably, a sunk groove for installing the pressure sensor is opened on the lower end surface of the gland.

[0010] Preferably, a sliding groove for the up and down movement of the floating block is opened on the side of the base facing the scraper chain.

[0011] Preferably, one end of the floating block has a slider adapted to the sliding groove, so that the slider can slide up and down along the sliding groove.

[0012] Preferably, on the side of the lower end face of the gland away from the base, there is a protrusion for limiting the floating block, and the protrusion and the sliding groove form a guide groove for the floating block to move up and down.

[0013] Preferably, a buffer pad is arranged at the bottom of the guide groove.

[0014] Preferably, the pressure sensor protrudes above the sunken groove, and a groove adapted to the size of the pressure sensor is provided on the upper end face of the floating block.

[0015] A method for controlling the tension of the scraper chain of a mining scraper conveyor, which uses the above-mentioned tension detection device for the scraper chain of the mining scraper conveyor for detection and control, includes the following steps.

[0016] Step S1: Obtain the normal pressure N formed by the axe end of the scraper on the pressure sensor.

[0017] Step S2: When the axe end of the scraper forms a normal pressure on the pressure sensor, obtain the angle A formed between the tensioned chains on both sides of the scraper; where the angle A is the angle formed by the center lines of a pair of standing rings and flat rings on both sides of the scraper when the scraper is below the pressure detection floating block.

[0018] Step S3: Calculate the tension F of the scraper chain based on the obtained pressure value N and angle A.

[0019] Step S4: According to the obtained tension F of the scraper chain, tighten the scraper chain through the telescopic tailstock cylinder.

[0020] Preferably, the tension F of the scraper chain is obtained through the following formula.

[0021]

[0022] Wherein, N is the normal pressure formed by the axe end on the pressure sensor; A is the angle formed between the tensioned chains on both sides of the scraper.

[0023] Preferably, the scraper chain is tightened in the following manner.

[0024] When the tension F of the scraper chain ≤ 0, the telescopic tailstock cylinder extends the cylinder to tighten the scraper chain to Wherein, B is the weight of three groups of scrapers and the connecting chains between the scrapers; the value range of P1 is 1.8 - 2.2.

[0025] When the tension of the scraper chain When, the telescopic tailstock cylinder retracts the cylinder to tighten the scraper chain to Among them, B is the weight of the three groups of scraper plates and the connecting chains between the scraper plates; the value range of P1 is 1.8 to 2.2; the value range of P2 is 3.8 to 4.2.

[0026] Compared with the prior art, the scraper chain tension detection device and the tension control method provided by the present invention, according to the characteristics of the scraper chain tension distribution during the raw coal transportation process of the scraper conveyor, etc., install a pressure detection component along the arc section on the tail of the machine to detect the positive pressure of the ax head of the scraper on the upper edge, and then detect the tension of the scraper chain. By detecting the tension of the scraper chain on the upper part of the tail of the scraper conveyor, it can be judged whether the tension of the scraper chain of the scraper conveyor is appropriate, which can be used as the basis for adjusting the tension of the scraper chain, and provides the most direct data support for the automatic control of the telescopic tail telescoping, and has achieved good results in the application of the coal mine underground working face. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of the present invention installed at the tail of the scraper conveyor.

[0029] Figure 2 For the present invention Figure 1 Top view structural diagram.

[0030] Figure 3 It is a schematic structural diagram of the tension detection device of the present invention.

[0031] Figure 4 For the present invention Figure 3 Top view structural diagram.

[0032] Figure 5 It is a schematic structural diagram of the floating block of the present invention.

[0033] Figure 6 It is a schematic structural diagram of the gland of the present invention.

[0034] In the figure: connecting seat 01, pressure detection component 02, base 21, chute 211, floating block 22, groove 221, slider 222, pressure sensor 23, gland 24, sink 241, protrusion 242, data processor 03, buffer pad 04, tension detection device 100, scraper 200, tail side plate 300, upper edge of the tail 400, chain 500. Detailed Embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc. indicating the orientation or position relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0037] Please refer to Figures 1 to 6 , in one embodiment, the present invention provides a tension detection device for a scraper chain of a mining scraper conveyor, including a connecting seat 01, a pressure detection component 02, and a data processor 03;

[0038] Among them, the connecting seat 01 is fixed on the U-shaped groove in the middle section of the tail side plate;

[0039] Among them, the pressure detection component 02 includes a base 21, a floating block 22, a pressure sensor 23, and a gland 24; the base 21 is installed on the connecting seat 01, one end of the gland 24 is installed on the base 21, and the other end of the gland 24 extends towards the scraper chain side, so that a channel for the axe end of the scraper to run is formed between the gland 24 and the upper edge of the tail. The pressure sensor 23 is installed on the lower end face of the gland 24, and the floating block 22 is slidably installed on the side of the base 21 facing the scraper chain, and the floating block 22 is located directly below the pressure sensor 23. When the axe end of the scraper squeezes the floating block 22, the floating block 22 can move upward along the base 21 to achieve the pressing of the pressure sensor 23 to detect the positive pressure of the scraper chain;

[0040] Among them, the data processor 03 establishes a communication connection with the pressure sensor 23. The data processor 03 receives the data transmitted by the pressure sensor 23, and the data processor 03 analyzes and processes it to calculate the positive pressure of the axe end of the scraper on the floating block 22.

[0041] In one way, a sunk groove 241 for installing the pressure sensor 23 is opened on the lower end face of the gland 24. Among them, when the pressure sensor 23 is installed in the sunk groove 241, the pressure sensor 23 protrudes from the sunk groove 241, and a groove 221 adapted to the size of the pressure sensor 23 is opened on the upper end face of the floating block 22.

[0042] In one way, a sliding groove 211 for the up and down movement of the floating block 22 is opened on the side of the base 21 facing the scraper chain.

[0043] Specifically, one end of the floating block 22 has a slider 222 adapted to the sliding groove 211, so that the slider 222 can slide up and down along the sliding groove 211. The bottom of the floating block 22 is inclined, that is, one end of the bottom of the floating block 22 close to the base 21 is higher than the end of the bottom of the floating block 22 away from the base 21.

[0044] In one way, on the side of the lower end face of the gland 24 away from the base 21, there is a protrusion 242 for limiting the floating block 22, and the protrusion 242 and the sliding groove 211 form a guide groove for the floating block 22 to move up and down.

[0045] In one way, a buffer pad 04 is arranged at the bottom of the guide groove. The buffer pad 04 can reduce the impact formed when the end of the scraper presses the pressure sensor 23, so as to reduce the vibration generated when the pressure sensor 23 is impacted.

[0046] In one embodiment, the present invention provides a method for controlling the tension of the scraper chain of a mining scraper conveyor. Using the tension detection device of the mining scraper conveyor for detection and control, it includes the following steps.

[0047] Step S1: Obtain the positive pressure N formed by the axe end of the scraper on the pressure sensor.

[0048] Step S2: When obtaining the positive pressure formed by the axe end of the scraper on the pressure sensor, obtain the angle A formed between the tensioned chains on both sides of the scraper; wherein, the angle A is the angle formed by the center lines of a pair of standing rings and flat rings on both sides of the scraper when the scraper is below the pressure detection floating block 22.

[0049] Step S3: Calculate the tension F of the scraper chain based on the obtained pressure value N and angle A.

[0050] Step S4: According to the obtained tension F of the scraper chain, tension the scraper chain through the telescopic tail cylinder.

[0051] Specifically, the tension F of the scraper chain is obtained through the following formula.

[0052]

[0053] Among them, N is the positive pressure formed by the axe end on the pressure sensor 23; A is the angle formed between the tensioned chains on both sides of the scraper.

[0054] Specifically, the scraper chain is tensioned in the following way.

[0055] When the tension F of the scraper chain ≤ 0, the telescopic tail cylinder extends the cylinder to tension the scraper chain to Among them, B is the weight of three groups of scrapers and the connecting chains between the scrapers; the value range of P1 is 1.8 - 2.2.

[0056] When the tension of the scraper chain is applied, the telescopic tail cylinder of the extensible tail retracts the cylinder, so that the scraper chain is tightened to wherein, B is the weight of three groups of scrapers and the connecting chains between the scrapers; the value range of P1 is 1.8 to 2.2; the value range of P2 is 3.8 to 4.2.

[0057] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand the whole or part of the processes of the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A tension detection device for the scraper chain of a mining scraper conveyor, characterized in that: including a connecting seat fixed on the U-shaped groove in the middle section of the tail side plate; a pressure detection assembly including a base, a floating block, a pressure sensor, and a gland; the base is installed on the connecting seat, one end of the gland is installed on the base, and the other end of the gland extends towards the side of the scraper chain, so that a channel for the ax end of the scraper to run is formed between the gland and the upper edge of the tail. The pressure sensor is installed on the lower end face of the gland. The floating block is slidably installed on the side of the base facing the scraper chain and is located directly below the pressure sensor. When the ax end of the scraper squeezes the floating block, the floating block can move upward along the base to press the pressure sensor to detect the positive pressure of the scraper chain; a data processor communicatively connected to the pressure sensor.

2. The scraper chain tension detection device for a mine scraper conveyor according to claim 1, wherein: A sink for installing the pressure sensor is provided on the lower end face of the gland.

3. The scraper chain tension detection device for a mine scraper conveyor according to claim 2, characterized in that: A chute for the floating block to move up and down is provided on the side of the base facing the scraper chain.

4. The scraper chain tension detection device for a mine scraper conveyor according to claim 3, characterized in that: One end of the floating block has a slider adapted to the chute, so that the slider can slide up and down along the chute.

5. The scraper chain tension detection device for a mine scraper conveyor according to claim 4, characterized in that: A protrusion for limiting the floating block is provided on the side of the lower end face of the gland away from the base, and the protrusion and the chute form a guide groove for the floating block to move up and down.

6. The scraper chain tension detection device for a mine scraper conveyor according to claim 5, characterized in that: A buffer pad is arranged at the bottom of the guide groove.

7. The scraper chain tension detection device for a mine scraper conveyor according to claim 4, characterized in that: The pressure sensor protrudes from the sink, and a groove adapted to the size of the pressure sensor is provided on the upper end face of the floating block.

8. A tension control method for the scraper chain of a mine scraper conveyor, which uses the mine scraper conveyor scraper chain tension detection device described in any one of claims 1-7 for detection and control, characterized in that: including the following steps Step S1: Obtain the positive pressure N formed by the ax end of the scraper on the pressure sensor; Step S2: Obtain the angle A formed between the chains tightened on both sides of the scraper when the ax end of the scraper forms a positive pressure on the pressure sensor; wherein, the angle A is the angle formed by the center lines of a pair of standing rings and flat rings on both sides of the scraper when the scraper is below the pressure detection floating block; Step S3: Calculate the tension F of the scraper chain based on the obtained pressure value N and angle A; Step S4: Tighten the scraper chain through the telescopic tail cylinder according to the obtained tension F of the scraper chain.

9. The scraper chain tension control method for a mine scraper conveyor according to claim 8, characterized in that: The tension F of the scraper chain is obtained through the following formula wherein, N is the positive pressure formed by the ax end on the pressure sensor; A is the angle formed between the chains tightened on both sides of the scraper.

10. The scraper chain tension control method for a mine scraper conveyor according to claim 9, characterized in that: The scraper chain is tightened in the following manner When the tension F of the scraper chain ≤ 0, the telescopic tail cylinder extends to tighten the scraper chain to where B is the weight of three groups of scrapers and the connecting chains between the scrapers; the value range of P1 is 1.8 - 2.2; When the tension of the scraper chain is reached, the telescopic tail cylinder retracts to tighten the scraper chain to where B is the weight of three groups of scrapers and the connecting chains between the scrapers; the value range of P1 is 1.8 - 2.2; the value range of P2 is 3.8 - 4.2.

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