Three-way proportional pressure-reducing tensioning control loop of belt wrapper

Abstract

The utility model discloses a belt wrapper three-way proportional pressure reduction tensioning control loop which comprises a pump station and a tensioning hydraulic cylinder, two oil outlets are formed in the pump station and communicated with a piston rod cavity and a piston cavity of the tensioning hydraulic cylinder through two oil supply pipelines respectively, and the two oil supply pipelines are communicated with the two oil supply pipelines respectively. A shared reversing valve is arranged on the two oil supply pipelines, a three-way proportional pressure reducing valve and a pressure detection device are further arranged on the oil supply pipeline communicated with the piston cavity, and a one-way throttle valve is arranged on each of the two oil supply pipelines. According to the three-way proportional pressure reduction tensioning control loop of the belt wrapper, the three-way proportional pressure reduction valve is adopted to control the tensioning force of the belt tensioning hydraulic cylinder on the belt, a hydraulic control oil way is simple, work is stable and reliable, the control effect is good, the response speed of tensioning and removing is high, normal operation of the wrapper is not affected, the work efficiency is improved, and the cost is reduced. And meanwhile, the rolling effect and the product quality are also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control of aluminum strip cold rolling mill coiling, in particular to a three-way proportional pressure reduction and tensioning control circuit of a belt coiling aid. Background Art

[0002] In the non-ferrous metal cold rolling unit, during each rolling process, the strip is thick and hard, so the coiler needs to assist in winding the strip on the coiler with appropriate tightening force. After the strip is wound on the coiler for several turns and can withstand a certain tension, the coiler is withdrawn and normal rolling can begin. Due to different strip thicknesses, different material alloys, and different hardnesses, different tightening forces are required from the coiler, which requires the tension of the coiler belt to be preset according to the strip.

[0003] At present, there are three schemes for controlling the tension of the reel: 1. Using a manual pressure reducing valve to control the circuit, the tension is adjusted to a common state through the pressure reducing valve, and the reeling effect is not ideal in other states; 2. Using a high-low pressure switching circuit, thin materials and soft materials use a low-pressure tensioning circuit, and thick materials and hard materials use a high-pressure tensioning circuit. The oil circuit design is complex and the control is not ideal; 3. Using a two-way proportional pressure reducing valve to control the tension circuit. Although the control of the tension can meet the requirements, the tension removal speed is slow, which affects the operation of the reel. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a three-way proportional pressure reducing tensioning control circuit for a belt winder. A three-way proportional pressure reducing valve is used to control the tensioning force of the belt tensioning hydraulic cylinder on the belt. The hydraulic control oil circuit is simple, the operation is stable and reliable, and the control effect is good, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-way proportional pressure reducing tensioning control circuit of a belt winder, comprising a pump station and a tensioning hydraulic cylinder, wherein the pump station is provided with two oil outlets, and the two oil outlets are respectively connected to the piston rod chamber and the piston chamber of the tensioning hydraulic cylinder through two oil supply pipelines, and a common reversing valve is provided on the two oil supply pipelines, wherein a three-way proportional pressure reducing valve and a pressure detection device are also provided on the oil supply pipeline connected to the piston chamber.

[0006] As an optimal technical solution of the utility model, the pressure detection device includes a pressure measuring joint arranged on a pressure measuring branch connected to the oil supply pipeline and a pressure sensor connected to the pressure measuring joint. The pressure measuring branch is arranged between the tensioning hydraulic cylinder and the three-way proportional pressure reducing valve.

[0007] As a preferred technical solution of the utility model, a one-way throttle valve is respectively provided on the two oil supply pipelines.

[0008] As a preferred technical solution of the utility model, a ball valve is respectively provided on the two oil supply pipelines, and the ball valve is arranged between the tensioning hydraulic cylinder and the pressure measuring branch.

[0009] As a preferred technical solution of the present utility model, the ball valve is a high-pressure ball valve.

[0010] Compared with the prior art, the beneficial effects of the utility model are: the three-way proportional pressure reducing tensioning control circuit of the belt winder adopts a three-way proportional pressure reducing valve to control the tensioning force of the belt tensioning hydraulic cylinder on the belt. The hydraulic control oil circuit is simple, the operation is stable and reliable, the control effect is good, and the response speed is very fast whether it is tensioning or removing, which does not affect the normal operation of the winder, improves work efficiency, and at the same time the rolling effect and product quality are also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] In the figure: 1 pump station, 2 reversing valve, 3 one-way throttle valve, 4 three-way proportional pressure reducing valve, 5 pressure sensor, 6 pressure measuring joint, 7 ball valve, 8 tensioning hydraulic cylinder. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] See also Figure 1 The utility model provides a technical solution: a three-way proportional pressure reducing tensioning control circuit of a belt winding machine, comprising a pump station 1 and a tensioning hydraulic cylinder 8. The pump station 1 is provided with two oil outlets, and the two oil outlets are respectively connected with the piston rod cavity and the piston cavity of the tensioning hydraulic cylinder 8 through two oil supply pipelines. A common reversing valve 2 is arranged on the two oil supply pipelines, wherein a three-way proportional pressure reducing valve 4 is also arranged on the oil supply pipeline connected with the piston cavity. The three-way proportional pressure reducing valve 4 is adopted to control the tensioning force of the belt tensioning hydraulic cylinder 8 on the belt. The hydraulic control oil circuit is simple, the operation is stable and reliable, the control effect is good, and the response speed of tensioning or removing is very fast, which does not affect the normal operation of the winding machine, improves the work efficiency, and at the same time improves the rolling effect and product quality.

[0015] According to the preferred technical solution, a pressure detection device is also arranged on the oil supply pipeline connected to the piston chamber, and the pressure detection device includes a pressure measuring joint 6 arranged on a pressure measuring branch line connected to the oil supply pipeline and a pressure sensor 5 connected to the pressure measuring joint 6. The pressure measuring branch line is arranged between the tensioning hydraulic cylinder 8 and the three-way proportional pressure reducing valve 4. The pressure sensor 5 is used to detect the pressure of the oil supply pipeline, thereby detecting the value of the tensioning force and providing feedback, and correcting the given signal of the three-way proportional pressure reducing valve 4, thereby achieving precise control of the belt tensioning force and further improving the control effect.

[0016] A further preferred technical solution is that a one-way throttle valve 3 is respectively arranged on the two oil supply pipelines. When the oil of the pump station 1 enters the tensioning hydraulic cylinder 8 through the oil supply pipeline, it passes through the one-way valve in the one-way throttle valve 3, and when the oil in the tensioning hydraulic cylinder 8 returns through the oil supply pipeline, it returns through the throttle valve in the one-way throttle valve 3, so as to control its return flow rate; the three-way proportional pressure reducing valve 4 is connected to the oil supply pipeline connected to the piston chamber through a separate return oil pipeline and is close to the pump station 1, so as to quickly remove the tensioning force.

[0017] The three-way proportional pressure reducing valve 4 adopts a 4-20mA control signal, corresponding to a pressure of 0-PMPa (P system pressure). When the winding aid is working and the belt needs to be tensioned when the winding aid is in place, the electromagnet a of the reversing valve 2 is energized, and the pressure oil enters the piston chamber of the tensioning hydraulic cylinder 8 through the reversing valve 2, the one-way throttle valve 3, and the three-way proportional pressure reducing valve 4. The piston rod extends to tension the belt. Different tensioning forces can be set by giving a signal size to the three-way proportional pressure reducing valve 4. The value of the tensioning force is detected and fed back by the pressure sensor 5, and the given signal of the three-way proportional pressure reducing valve is corrected, thereby achieving a satisfactory control effect on the tensioning force.

[0018] When the winding aid returns, the tensioning force is first removed, the electromagnet b of the reversing valve 2 is energized, and the pressure oil enters the piston rod chamber of the tensioning hydraulic cylinder 8 through the reversing valve 2 and the one-way throttle valve 3, and the piston rod retracts. At this time, the three-way proportional pressure reducing valve 4 is not energized, and the oil in the piston of the tensioning hydraulic cylinder 8 returns to the oil tank through the T port of the three-way proportional pressure reducing valve 4, thereby realizing the rapid removal of the tensioning force.

[0019] The preferred technical solution is that a ball valve 7 is provided on each of the two oil supply pipelines, and the ball valve 7 is provided between the tensioning hydraulic cylinder 8 and the pressure measuring branch for easy maintenance. If any component such as the three-way proportional pressure reducing valve 4 is replaced, the ball valve 7 can be closed to reduce hydraulic oil leakage.

[0020] A further preferred technical solution is that the ball valve 7 is a high-pressure ball valve, which has the advantages of simple structure, small size, light weight, tight and reliable, good sealing, easy operation, rapid opening and closing, and only needs to be rotated 90° from fully open to fully closed, which is convenient for remote control and more convenient for maintenance.

[0021] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. A belt winding device three-way proportional pressure reducing tensioning control circuit, comprising a pump station (1) and a tensioning hydraulic cylinder (8), characterized in that: The pump station (1) is provided with two oil outlets, which are respectively connected to the piston rod chamber and the piston chamber of the tensioning hydraulic cylinder (8) through two oil supply pipelines, and a common reversing valve (2) is provided on the two oil supply pipelines, wherein the oil supply pipeline connected to the piston chamber is also provided with a three-way proportional pressure reducing valve (4) and a pressure detection device.

2. A belt winder three-way proportional pressure reduction and tensioning control circuit according to claim 1, characterized in that: The pressure detection device comprises a pressure measuring joint (6) arranged on a pressure measuring branch line connected to an oil supply pipeline and a pressure sensor (5) connected to the pressure measuring joint (6); the pressure measuring branch line is arranged between a tensioning hydraulic cylinder (8) and a three-way proportional pressure reducing valve (4).

3. A belt winder three-way proportional pressure reduction and tensioning control circuit according to claim 2, characterized in that: A one-way throttle valve (3) is respectively provided on the two oil supply pipelines.

4. A belt winder three-way proportional pressure reduction and tensioning control circuit according to claim 3, characterized in that: A ball valve (7) is provided on each of the two oil supply pipelines, and the ball valve (7) is provided between the tensioning hydraulic cylinder (8) and the pressure measuring branch.

5. A belt winder three-way proportional pressure reduction and tensioning control circuit according to claim 4, characterized in that: The ball valve (7) is a high-pressure ball valve.

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