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CN-224198527-U - Tensioning device, conveyor and heading machine

CN224198527UCN 224198527 UCN224198527 UCN 224198527UCN-224198527-U

Abstract

The application relates to the technical field of heading machines, in particular to a tensioning device, a conveyor and a heading machine, wherein the tensioning device comprises tensioning oil cylinders, a tensioning device and a tensioning device, wherein the tensioning oil cylinders are arranged at two sides of the conveyor and are used for tensioning scraper chains of the conveyor; the hydraulic control device comprises a tensioning oil cylinder, an oil supply mechanism and a pressure control mechanism, wherein the oil supply mechanism is connected with an oil inlet of the tensioning oil cylinder through a pipeline and used for continuously providing hydraulic oil for the tensioning oil cylinder, and the pressure control mechanism is connected with an oil return port of the tensioning oil cylinder through a pipeline and used for controlling the pressure of the tensioning oil cylinder to be kept within a preset threshold range. The pressure control mechanism is used for enabling the hydraulic oil to keep the pressure of the tensioning oil cylinder in real time and dynamically adjusting the stroke of the tensioning oil cylinder, so that the tensioning oil cylinder can automatically adjust the tightness of a scraper chain of a first conveyor of the heading machine according to the load.

Inventors

  • XI YABING
  • LI WENLONG
  • ZHAO YONGLE

Assignees

  • 三一重型装备有限公司
  • 三一智能装备有限公司

Dates

Publication Date
20260505
Application Date
20250530

Claims (10)

  1. 1. A tensioning device, comprising: The tensioning oil cylinders (1) are arranged at two sides of the conveyor and are used for tensioning scraper chains of the conveyor; The oil supply mechanism (2) is connected with an oil inlet of the tensioning oil cylinder (1) through a pipeline and is used for continuously providing hydraulic oil for the tensioning oil cylinder (1); The pressure control mechanism (3) is connected with an oil return port of the tensioning oil cylinder (1) through a pipeline and is used for controlling the pressure of the tensioning oil cylinder (1) to be kept within a preset threshold range.
  2. 2. A tensioning device according to claim 1, further comprising a one-way valve (4) arranged on a pipeline of an oil inlet of the tensioning cylinder (1), the one-way valve (4) being used for conducting the pipeline unidirectionally from the oil supply mechanism (2) to the oil inlet of the tensioning cylinder (1).
  3. 3. The tensioning device according to claim 1, wherein the oil supply mechanism (2) comprises an oil pump motor (21) and a hydraulic pump (22), the output end of the oil pump motor (21) is connected with the hydraulic pump (22), and the hydraulic pump (22) is connected with an oil inlet of the tensioning oil cylinder (1) through a pipeline.
  4. 4. A tensioning device according to claim 3, characterized in that the hydraulic pump (22) is a gear pump.
  5. 5. A tensioning device as claimed in claim 1, characterized in that the pressure control means (3) is a back pressure valve.
  6. 6. A tensioning device as claimed in claim 1, characterized in that the pressure control means (3) are electro-hydraulic proportional valves.
  7. 7. A tensioning device according to claim 1, characterized in that the tensioning cylinder (1) comprises a cylinder body (11), a cylinder rod (12) and a spring seat (13), wherein the cylinder rod (12) is arranged in the cylinder body (11), the spring seat (13) is arranged at the output end of the cylinder rod (12), the cylinder body (11) is arranged on a rear chute of the conveyor, the spring seat (13) is arranged on a driving device of the conveyor, and the cylinder rod (12) is extended by providing hydraulic oil through the oil supply mechanism (2) so as to enable the driving device to slide, thereby tensioning a scraper chain of the conveyor.
  8. 8. The tensioning device according to claim 7, wherein the spring seat (13) comprises a spacer bush (131), a tensioning spring (132) and a shell (133), the spacer bush (131) is arranged at the output end of the oil cylinder rod (12), the tensioning spring (132) is arranged on the spacer bush (131), and the shell (133) is used for accommodating the spacer bush (131) and the tensioning spring (132).
  9. 9. A conveyor for transporting articles of manufacture, characterized by comprising the following steps: a tensioning device as defined in any one of claims 1 to 8.
  10. 10. A heading machine comprising a conveyor as claimed in claim 9.

Description

Tensioning device, conveyor and heading machine Technical Field The application relates to the technical field of heading machines, in particular to a tensioning device, a conveyor and a heading machine. Background The heading machine, also called as a heading and anchoring machine, is comprehensive engineering mechanical equipment integrating tunneling and anchoring operation, and is mainly used in tunnel construction in the fields of coal mine, tunnel, underground engineering and the like. In the use process of the heading machine, the scraper chain is loosened and tightened due to the lifting of the shovel plate, and chain jump frequently occurs, so that the scraper chain tensioning device is arranged at the rear end of the first conveyor. One end of the tensioning device is fixed on the rear chute, the other end of the tensioning device is fixed on the driving device, the driving device is fixed on the rear chute and moves on a slideway parallel to the transportation direction, the position of the driving chain wheel can be adjusted by adjusting the moving mechanism of the tensioning device and the displacement of the driving device along the slideway direction, and then the tightness degree of the scraper chain is adjusted and the effects of vibration reduction and the like are achieved. The first conveyor tensioning device of the heading machine disclosed in China patent application No. 201320550571. X can prevent the opening locking plate from falling off by arranging the opening locking plate in a covering or partial covering mode, and the opening locking plate can be exposed when the front edge of the boss abuts against the front wall of the radial groove by taking down the fixing bolt, so that the opening gasket and the opening locking plate can be conveniently installed and detached. However, in the conventional tensioning device, after the first conveyor chain is tensioned through the piston rod, the piston rod is required to be clamped by the opening locking plate, so that the piston rod is prevented from returning, at the moment, only the tensioning spring is slightly moved under the action of external load, the general rigidity coefficient of the tensioning spring is fixed, the spring is very hard, when the scraper encounters resistance change, the damping effect is not obvious due to the fact that the rigidity coefficient of the spring is large, the damping effect is poor, and the tensioning degree of the chain cannot be automatically adjusted according to the condition of the scraper load. Disclosure of utility model The present application aims to solve at least one of the technical problems existing in the prior art or related art. Therefore, the application provides the tensioning device, which utilizes hydraulic oil to maintain the pressure of the tensioning oil cylinder in real time, dynamically adjusts the stroke of the tensioning oil cylinder, and can automatically adjust the tightness of the scraper chain of the first conveyor of the heading machine according to the load. The application also provides a conveyor and a heading machine comprising the tensioning device. The tensioning device comprises tensioning oil cylinders, scraper chains, an oil supply mechanism and a pressure control mechanism, wherein the tensioning oil cylinders are arranged on two sides of a conveyor and are used for tensioning scraper chains of the conveyor, the oil supply mechanism is connected with an oil inlet of each tensioning oil cylinder through a pipeline and is used for continuously providing hydraulic oil for the tensioning oil cylinders, and the pressure control mechanism is connected with an oil return port of each tensioning oil cylinder through a pipeline and is used for controlling the pressure of each tensioning oil cylinder to be kept within a preset threshold range. Optionally, the tensioning device further comprises a one-way valve arranged on a pipeline of the oil inlet of the tensioning oil cylinder, wherein the one-way valve is used for enabling the pipeline to be conducted unidirectionally from the oil supply mechanism to the oil inlet of the tensioning oil cylinder. Optionally, the oil supply mechanism comprises an oil pump motor and a hydraulic pump, wherein the output end of the oil pump motor is connected with the hydraulic pump, and the hydraulic pump is connected with the oil inlet of the tensioning oil cylinder through a pipeline. Optionally, the hydraulic pump is a gear pump. Optionally, the pressure control mechanism is a back pressure valve. Optionally, the pressure control mechanism is an electro-hydraulic proportional valve. The tensioning oil cylinder comprises a cylinder body, an oil cylinder rod and a spring seat, wherein the oil cylinder rod is arranged in the cylinder body, the spring seat is arranged at the output end of the oil cylinder rod, the cylinder body is arranged on a rear chute of the conveyor, the spring seat is arranged on a driving device of the conveyor, a