阅读说明：本技术 一种六辊板带轧机上支撑辊平衡回路 (Upper support roller balance loop of six-roller plate and strip rolling mill ) 是由 魏志毅 魏维刚 徐利璞 苏明 计江 于 2019-11-19 设计创作，主要内容包括：本发明属于板带轧制技术领域,具体涉及一种六辊板带轧机上支撑辊平衡回路。本发明通过五个球阀、减压阀、测压组件、两个电磁换向阀、零泄漏电磁锁阀、溢流阀、两个二通流量控制阀、两个第一整流叠加板、叠加式溢流阀、两个压力继电器、两个操作侧上支撑辊平衡缸和两个传动侧上支撑辊平衡缸有机组合而成。本发明的操作侧上支撑辊平衡缸和传动侧上支撑辊平衡缸运动速度方便的实现了同步调整,上支撑辊平衡缸能够实现三种不同的平衡压力,减少了上支撑辊重量完全压在上中间辊上产生辊印的可能。在停机时,上支撑辊位置能够长期保持上支撑辊平衡位置,有效保证了轧制带材的成品质量。(The invention belongs to the technical field of strip rolling, and particularly relates to a support roller balancing loop on a six-roller strip rolling mill. The device is formed by organically combining five ball valves, a pressure reducing valve, a pressure measuring assembly, two electromagnetic directional valves, a zero-leakage electromagnetic lock valve, an overflow valve, two-way flow control valves, two first rectification superposed plates, a superposed overflow valve, two pressure relays, two supporting roller balance cylinders on an operating side and two supporting roller balance cylinders on a transmission side. The movement speeds of the supporting roller balance cylinder on the operating side and the supporting roller balance cylinder on the transmission side are conveniently and synchronously adjusted, the upper supporting roller balance cylinder can realize three different balance pressures, and the possibility that the weight of the upper supporting roller completely presses the upper middle roller to generate roller marks is reduced. When the machine is stopped, the upper supporting roller can be kept at the balance position for a long time, and the quality of the finished rolled strip is effectively ensured.)

1. The utility model provides a support roll balanced return circuit on six roll plate strip rolling mills which characterized in that: the device comprises a first electromagnetic directional valve (4-1), a zero-leakage electromagnetic lock valve (5), a first two-way flow control valve (7-1), a second two-way flow control valve (7-2), a first rectification superposition plate (8-1), a second rectification superposition plate (8-2), an operation side upper support roller balance cylinder, a transmission side upper support roller balance cylinder, a total oil supply port (Ps) and a total oil return port (T); the main oil supply port (Ps) is connected with an inlet of a zero-leakage electromagnetic lock valve (5) through a first electromagnetic directional valve (4-1), and an outlet of the zero-leakage electromagnetic lock valve (5) is respectively connected with a first rectifying and superposing plate (8-1) and a second rectifying and superposing plate (8-2); the first rectification superposition plate (8-1) is connected with a plug cavity of the supporting roller balance cylinder on the operation side through a first two-way flow control valve (7-1), the second rectification superposition plate (8-2) is connected with the plug cavity of the supporting roller balance cylinder on the transmission side through a second two-way flow control valve (7-2), a rod cavity of the supporting roller balance cylinder on the operation side and a rod cavity of the supporting roller balance cylinder on the transmission side are connected with a first electromagnetic reversing valve (4-1), and the total oil return port (T) is connected with the first electromagnetic reversing valve (4-1).

2. The support roll balancing circuit on a six roll strip mill as claimed in claim 1, wherein: the device also comprises a pressure reducing valve (2); an inlet of the pressure reducing valve (2) is connected with a main oil supply port (Ps), an outlet of the pressure reducing valve (2) is connected with the first electromagnetic directional valve (4-1), and an oil drainage port of the pressure reducing valve (2) is connected with a main oil return port (T).

3. A balance circuit for support rolls on a six-roll strip mill as claimed in any one of claims 2, wherein: the device also comprises a pressure measuring component (3); and the pressure measuring component (3) is connected with the pressure reducing valve (2) and is used for measuring the working pressure of the upper supporting roller balance loop.

4. The support roll balancing circuit on a six roll strip mill as claimed in claim 1, wherein: the ball valve also comprises a first ball valve (1-1), a second ball valve (1-2), a third ball valve (10-1), a fourth ball valve (10-2) and a fifth ball valve (10-3); the first ball valve (1-1) is connected to a pipeline connecting the main oil supply port (Ps) and the first electromagnetic directional valve (4-1); the second ball valve (1-2) is connected to the main oil return port (T); the third ball valve (10-1) is connected to a pipeline between the first rectifying superposition plate (8-1) and the supporting roller balance cylinder on the operation side, the fourth ball valve (10-2) is connected to a pipeline connected between the second rectifying superposition plate (8-2) and the supporting roller balance cylinder on the transmission side, and the fifth ball valve (10-3) is connected to a pipeline connected between a rod cavity of the supporting roller balance cylinder on the operation side and a rod cavity of the supporting roller balance cylinder on the transmission side and the first electromagnetic reversing valve (4-1).

5. A support roll balancing circuit on a six high strip mill as claimed in any one of claims 1 to 3, wherein: the electromagnetic reversing valve also comprises an overflow valve (6), a superposed overflow valve (9) and a second electromagnetic reversing valve (4-2); an inlet of the overflow valve (6) is connected with an outlet of the zero-leakage electromagnetic lock valve (5), an outlet of the overflow valve (6) is connected with a total oil return port (T), and an oil drainage port of the overflow valve (6) is connected with the second electromagnetic directional valve (4-2); and working oil ports A and B of the second electromagnetic directional valve (4-2) are connected with a main oil return port (T) through a superposition type overflow valve (9).

6. A support roll balancing circuit on a six high strip mill as claimed in any one of claims 1 to 3, wherein: the device also comprises a first pressure relay (11-1) and a second pressure relay (11-2); the first pressure relay (11-1) is arranged between the zero-leakage electromagnetic lock valve (5) and the first rectifying and superposing plate (8-1) and the second rectifying and superposing plate (8-2); and the second pressure relay (11-2) is arranged between the rod cavity of the supporting roller balancing cylinder on the operation side and the rod cavity of the supporting roller balancing cylinder on the transmission side and the first electromagnetic directional valve (4-1).

7. The support roll balancing circuit on a six roll strip mill as claimed in claim 1, wherein: the operating side upper supporting balance cylinder comprises a first operating side upper supporting roll balance cylinder (12-1) and a second operating side upper supporting roll balance cylinder (12-2); the first operation side upper supporting roller balance cylinder (12-1) and the second operation side upper supporting roller balance cylinder (12-2) are connected in parallel.

8. The support roll balancing circuit on a six roll strip mill as claimed in claim 1, wherein: the supporting roller balancing cylinder on the transmission side comprises a supporting roller balancing cylinder (12-3) on the first transmission side and a supporting roller balancing cylinder (12-4) on the second transmission side; the supporting roller balance cylinder (12-3) on the first transmission side and the supporting roller balance cylinder (12-4) on the second transmission side are connected in parallel.

9. The support roll balancing circuit on a six roll strip mill as claimed in claim 1, wherein: the pressure-reducing valve further comprises a pressure-reducing valve (2), a first ball valve (1-1), a second ball valve (1-2), a third ball valve (10-1), a fourth ball valve (10-2), a fifth ball valve (10-3), an overflow valve (6), a superposed overflow valve (9), a second electromagnetic directional valve (4-2), a pressure-measuring component (3), a first pressure relay (11-1) and a second pressure relay (11-2); an inlet of the pressure reducing valve (2) is connected with a main oil supply port (Ps), an outlet of the pressure reducing valve (2) is connected with the first electromagnetic directional valve (4-1), and an oil drainage port of the pressure reducing valve (2) is connected with a main oil return port (T); the first ball valve (1-1) is connected to a pipeline connecting the main oil supply port (Ps) and the first electromagnetic directional valve (4-1); the second ball valve (1-2) is connected to the main oil return port (T); the third ball valve (10-1) is connected to a pipeline between the first rectifying and overlaying plate (8-1) and the supporting roller balance cylinder on the operation side, the fourth ball valve (10-2) is connected to a pipeline connected between the second rectifying and overlaying plate (8-2) and the supporting roller balance cylinder on the transmission side, and the fifth ball valve (10-3) is connected to a pipeline connected between a rod cavity of the supporting roller balance cylinder on the operation side and a rod cavity of the supporting roller balance cylinder on the transmission side and the first electromagnetic reversing valve (4-1); an inlet of the overflow valve (6) is connected with an outlet of the zero-leakage electromagnetic lock valve (5), an outlet of the overflow valve (6) is connected with a total oil return port (T), and an oil drainage port of the overflow valve (6) is connected with the second electromagnetic directional valve (4-2); working oil ports A and B of the second electromagnetic directional valve (4-2) are connected with a main oil return port (T) through a superposed overflow valve (9); the pressure measuring assembly (3) is connected with the pressure reducing valve and used for measuring the working pressure of the upper supporting roller balance loop; the first pressure relay (11-1) is arranged between the zero-leakage electromagnetic lock valve (5) and the first rectifying and superposing plate (8-1) and the second rectifying and superposing plate (8-2); the second pressure relay (11-2) is arranged between the rod cavity of the supporting roller balancing cylinder on the operation side, the rod cavity of the supporting roller balancing cylinder on the transmission side and the first electromagnetic directional valve (4-1); the operating side upper support roll balancing cylinder comprises a first operating side upper support roll balancing cylinder (12-1) and a second operating side upper support roll balancing cylinder (12-2); the first operation side upper supporting roller balance cylinder (12-1) and the second operation side upper supporting roller balance cylinder (12-2) are connected in parallel; the supporting roller balancing cylinder on the transmission side comprises a supporting roller balancing cylinder (12-3) on the first transmission side and a supporting roller balancing cylinder (12-4) on the second transmission side; the supporting roller balance cylinder (12-3) on the first transmission side and the supporting roller balance cylinder (12-4) on the second transmission side are connected in parallel.

Technical Field

The invention belongs to the technical field of strip rolling, and particularly relates to a support roller balancing loop on a six-roller strip rolling mill.

Background

In the production process of a six-roller plate and strip rolling mill, the weight of the upper supporting roller is an interference factor for the control of the rolling mill, so the weight of the upper supporting roller needs to be balanced in the rolling process to reduce the influence on rolling. In the roll changing process, the upper supporting roll needs to be balanced or fall down according to the roll changing requirement, and the action of the upper supporting roll is controlled by an upper supporting roll balancing loop. The traditional upper supporting roller balance loop has the following defects:

1) the supporting roller balance cylinder on the operation side and the supporting roller balance cylinder on the transmission side are controlled simultaneously, working oil is directly distributed to the supporting roller balance cylinder on the operation side and the supporting roller balance cylinder on the transmission side through a tee joint, the supporting roller balance cylinder on the operation side and the supporting roller balance cylinder on the transmission side do not have independent adjusting functions, the supporting roller balance cylinder on the operation side and the supporting roller balance cylinder on the transmission side are asynchronous due to the influence of factors such as machining precision, and accidents such as inclination of the supporting roller can occur in the roller changing process.

2) The balance pressure of the upper supporting roller balance loop is fixed, the upper supporting roller balance cylinder falls down and is controlled by pressure oil introduced into a rod cavity of the upper supporting roller balance cylinder through the electromagnetic directional valve, and the weight of the upper supporting roller completely falls onto the upper middle roller after falling down, so that a roller mark is easily formed, and the quality of a rolled strip finished product is influenced.

3) When the machine is stopped, the position of the upper supporting roller is kept by adopting a common superposed hydraulic control one-way valve, the balance position of the upper supporting roller cannot be kept for a long time, and the upper supporting roller can naturally fall down after staying for a period of time and is contacted with the upper middle roller to form a roller mark, so that the quality of a rolled strip finished product is influenced.

Disclosure of Invention

The invention provides an upper supporting roll balancing loop of a six-roll plate strip rolling mill, and aims to provide the upper supporting roll balancing loop of the six-roll plate strip rolling mill, which can ensure the synchronization of the actions of an operating side and a transmission side in the roll changing process of an upper supporting roll and can realize different balancing forces of the upper supporting roll balancing loop; the second purpose is to provide a balance loop of the upper supporting roller of the six-roller plate strip rolling mill, which can keep the balance position of the upper supporting roller for a long time when the rolling mill is stopped, thereby effectively ensuring the quality of rolled strip finished products.

In order to achieve the purpose, the invention adopts the technical scheme that:

a supporting roll balancing loop on a six-roll plate strip rolling mill comprises a first electromagnetic directional valve, a zero-leakage electromagnetic lock valve, a first two-way flow control valve, a second two-way flow control valve, a first rectifying superposition plate, a second rectifying superposition plate, an operating side upper supporting roll balancing cylinder, a transmission side upper supporting roll balancing cylinder, a total oil supply port and a total oil return port; the main oil supply port is connected with an inlet of a zero-leakage electromagnetic lock valve through a first electromagnetic directional valve, and an outlet of the zero-leakage electromagnetic lock valve is respectively connected with a first rectification superposition plate and a second rectification superposition plate; the first rectification superposed plate is connected with a plug cavity of the supporting roller balance cylinder on the operation side through a first two-way flow control valve, the second rectification superposed plate is connected with a plug cavity of the supporting roller balance cylinder on the transmission side through a second two-way flow control valve, a rod cavity of the supporting roller balance cylinder on the operation side and a rod cavity of the supporting roller balance cylinder on the transmission side are connected with the first electromagnetic reversing valve, and the total oil return port is connected with the first electromagnetic reversing valve.

The device also comprises a pressure reducing valve; the inlet of the pressure reducing valve is connected with the main oil supply port, the outlet of the pressure reducing valve is connected with the first electromagnetic directional valve, and the oil drainage port of the pressure reducing valve is connected with the main oil return port.

The device also comprises a pressure measuring component; and the pressure measuring assembly is connected with the pressure reducing valve and is used for measuring the working pressure of the upper supporting roller balance loop.

The ball valve also comprises a first ball valve, a second ball valve, a third ball valve, a fourth ball valve and a fifth ball valve; the first ball valve is connected to a pipeline connecting the main oil supply port and the first electromagnetic directional valve; the second ball valve is connected to the main oil return port; the third ball valve is connected to a pipeline between the first rectification superposition plate and the supporting roller balance cylinder on the operation side, the fourth ball valve is connected to a pipeline between the second rectification superposition plate and the supporting roller balance cylinder on the transmission side, and the fifth ball valve is connected to a pipeline between a rod cavity of the supporting roller balance cylinder on the operation side and a rod cavity of the supporting roller balance cylinder on the transmission side and the first electromagnetic reversing valve.

The electromagnetic reversing valve also comprises an overflow valve, a superposed overflow valve and a second electromagnetic reversing valve; the inlet of the overflow valve is connected with the outlet of the zero-leakage electromagnetic lock valve, the outlet of the overflow valve is connected with the main oil return port, and the oil drainage port of the overflow valve is connected with the second electromagnetic directional valve; and working oil ports A and B of the second electromagnetic directional valve are connected with a main oil return port through a superposition type overflow valve.

The device also comprises a first pressure relay and a second pressure relay; the first pressure relay is arranged between the zero-leakage electromagnetic lock valve and the first rectifying and superposing plate as well as the second rectifying and superposing plate; and the second pressure relay is arranged between the rod cavity of the balance cylinder of the support roller on the operation side and the rod cavity of the balance cylinder of the support roller on the transmission side and the first electromagnetic directional valve.

The operating side upper supporting balance cylinder comprises a first operating side upper supporting roll balance cylinder and a second operating side upper supporting roll balance cylinder; the first operation side upper supporting roller balance cylinder and the second operation side upper supporting roller balance cylinder are connected in parallel.

The transmission side upper supporting roller balance cylinder comprises a first transmission side upper supporting roller balance cylinder and a second transmission side upper supporting roller balance cylinder; the supporting roller balance cylinder on the first transmission side and the supporting roller balance cylinder on the second transmission side are connected in parallel.

The pressure reducing valve, the first ball valve, the second ball valve, the third ball valve, the fourth ball valve, the fifth ball valve, the overflow valve, the overlapped overflow valve, the second electromagnetic directional valve, the pressure measuring assembly, the first pressure relay and the second pressure relay are further included; an inlet of the pressure reducing valve is connected with the main oil supply port, an outlet of the pressure reducing valve is connected with the first electromagnetic directional valve, and an oil drainage port of the pressure reducing valve is connected with the main oil return port; the first ball valve is connected to a pipeline connecting the main oil supply port and the first electromagnetic directional valve; the second ball valve is connected to the main oil return port; the third ball valve is connected to a pipeline between the first rectifying and overlaying plate and the supporting roller balance cylinder on the operation side, the fourth ball valve is connected to a pipeline connected between the second rectifying and overlaying plate and the supporting roller balance cylinder on the transmission side, and the fifth ball valve is connected to a pipeline connected between a rod cavity of the supporting roller balance cylinder on the operation side and a rod cavity of the supporting roller balance cylinder on the transmission side and the first electromagnetic reversing valve; the inlet of the overflow valve is connected with the outlet of the zero-leakage electromagnetic lock valve, the outlet of the overflow valve is connected with the main oil return port, and the oil drainage port of the overflow valve is connected with the second electromagnetic directional valve; working oil ports A and B of the second electromagnetic directional valve are connected with a main oil return port through a superposed overflow valve; the pressure measuring assembly is connected with the pressure reducing valve and is used for measuring the working pressure of the upper supporting roller balance loop; the first pressure relay is arranged between the zero-leakage electromagnetic lock valve and the first rectifying and superposing plate as well as the second rectifying and superposing plate; the second pressure relay is arranged between the rod cavity of the support roller balance cylinder on the operation side and the rod cavity of the support roller balance cylinder on the transmission side and the first electromagnetic directional valve; the operating side upper support roll balancing cylinder comprises a first operating side upper support roll balancing cylinder and a second operating side upper support roll balancing cylinder; the first operation side upper supporting roller balance cylinder and the second operation side upper supporting roller balance cylinder are connected in parallel; the transmission side upper supporting roller balance cylinder comprises a first transmission side upper supporting roller balance cylinder and a second transmission side upper supporting roller balance cylinder; the supporting roller balance cylinder on the first transmission side and the supporting roller balance cylinder on the second transmission side are connected in parallel.

Has the advantages that:

the device is formed by organically combining five ball valves, a pressure reducing valve, a pressure measuring assembly, two electromagnetic directional valves, a zero-leakage electromagnetic lock valve, an overflow valve, two-way flow control valves, two first rectification superposed plates, a superposed overflow valve, two pressure relays, two supporting roller balance cylinders on an operating side and two supporting roller balance cylinders on a transmission side. The upper supporting roller balance cylinder on the operation side and the upper supporting roller balance cylinder on the transmission side of the invention have convenient movement speed to realize synchronous adjustment, avoid the occurrence of accidents such as the inclination of the upper supporting roller and the like in the roller changing process, realize three different balance pressures, and reduce the possibility that the weight of the upper supporting roller is completely pressed on the upper middle roller to generate roller marks. When the machine is stopped, the upper supporting roller can be kept at the balance position for a long time, and the quality of the finished rolled strip is effectively ensured.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic diagram of the present invention.

In the figure: 1-1, a first ball valve; 1-2, a second ball valve; 2-a pressure reducing valve; 3-a pressure measuring assembly; 4-1, a first electromagnetic directional valve; 4-2, a second electromagnetic directional valve; 5. a zero leakage solenoid lock valve; 6. an overflow valve; 7-1, a first two-way flow control valve; 7-2, a second two-way flow control valve; 8-1, a first rectifying and superposing plate; 8-2, a second rectifying and superposing plate; 9. a superposed overflow valve; 10-1, a third ball valve; 10-2, a fourth ball valve; 10-3, a fifth ball valve; 11-1, a first pressure relay; 11-2, a second pressure relay; 12-1, a support roll balancing cylinder on the first operating side; 12-2, a support roll balancing cylinder on the second operating side; 12-3, a support roll balancing cylinder on the first drive side; 12-4, a support roll balancing cylinder on the second drive side; ps-total oil supply port; t-total oil return port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.