Pneumatic control system of rotary table of continuous casting machine

Abstract

The utility model discloses a pneumatic control system of a rotary table of a continuous casting machine, and belongs to the field of pneumatic systems. Comprising a brake cylinder, a rotary table locking cylinder and a pneumatic motor, the first valve group is used for controlling the brake cylinder and comprises a first pneumatic valve, a first electromagnetic valve, a second pneumatic valve and a first pneumatic logic valve; the second valve group is used for controlling the rotary table locking cylinder and comprises a third pneumatic valve, a second electromagnetic valve, a fourth pneumatic valve and a second pneumatic logic valve; the third valve group is used for controlling the pneumatic motor and comprises a fifth pneumatic valve, a third electromagnetic valve and a fourth electromagnetic valve; and outlets of the third electromagnetic valve and the fourth electromagnetic valve are communicated with pneumatic control ports of the third pneumatic valve and the fourth pneumatic valve through a third pneumatic logic valve. The pneumatic control system provided by the utility model can operate normally in a power failure state.

Description

Technical Field

[0001] The utility model relates to the field of air control systems, in particular to an air control system for a rotary table of a continuous casting machine. Background Art

[0002] On the continuous casting machine in the metallurgical industry, the rotating table is responsible for moving the molten steel from the converter to the tundish pouring position. When a power outage occurs, the ladle on the rotating table must be immediately transferred from the tundish pouring position to the emergency ladle position, otherwise the tundish liquid level will be full and the equipment will be burned. Therefore, the control gas control system of the large ladle rotating table must be able to operate normally under both normal working conditions and special working conditions (such as power outage conditions). Therefore, it is necessary to provide a gas control system with power outage emergency function. Utility Model Content

[0003] To this end, the utility model proposes a gas control system for a continuous casting machine rotary table, which can operate normally in a power outage state.

[0004] In view of the above technical problems, the utility model provides the following technical solutions:

[0005] A pneumatic control system for a continuous casting machine turntable, comprising: a brake cylinder, a turntable locking cylinder and a pneumatic motor; a first valve group for controlling the brake cylinder, the first valve group comprising a first pneumatic valve, a first solenoid valve, a second pneumatic valve and a first pneumatic logic valve, the outlet of the first pneumatic valve being connected to the brake cylinder; the first solenoid valve and the second pneumatic valve being connected in parallel, the outlets of the first solenoid valve and the second pneumatic valve being connected to the pneumatic control port of the first pneumatic valve through the first pneumatic logic valve; a second valve group for controlling the turntable locking cylinder, the second valve group comprising a third pneumatic valve, a second solenoid valve, a fourth pneumatic valve and a second pneumatic logic valve, the outlet of the third pneumatic valve being connected to the turntable The turntable locking cylinder is connected; the second solenoid valve is connected in parallel with the fourth pneumatic valve, and the outlets of the second solenoid valve and the fourth pneumatic valve are connected to the air control port of the third pneumatic valve through the second pneumatic logic valve; the third valve group that controls the pneumatic motor, the third valve group includes a fifth pneumatic valve, a third solenoid valve and a fourth solenoid valve, the outlet of the fifth pneumatic valve is connected to the pneumatic motor, the outlet of the third solenoid valve is connected to the first air control port of the fifth pneumatic valve, and the outlet of the fourth solenoid valve is connected to the second air control port of the fifth pneumatic valve; wherein, the outlets of the third solenoid valve and the fourth solenoid valve are connected to the air control ports of the third pneumatic valve and the fourth pneumatic valve through the third pneumatic logic valve.

[0006] Some implementations of the utility model further include a fifth solenoid valve, the outlet of the fifth solenoid valve being connected to the inlet of the third solenoid valve and the fourth solenoid valve.

[0007] In some embodiments of the utility model, the first solenoid valve and the second solenoid valve are two-position three-way valves, the second pneumatic valve and the fourth pneumatic valve are two-position three-way valves, and the first pneumatic logic valve and the second pneumatic logic valve are two-position three-way valves; in the initial state, the first solenoid valve and the second solenoid valve are located in the isolation position, the second pneumatic valve and the fourth pneumatic valve are two-position three-way valves located in the isolation position, and the first pneumatic logic valve and the second pneumatic logic valve are located in the isolation position; in the normal working state, the first solenoid valve and the second solenoid valve are located in the conduction position, the first pneumatic logic valve and the second pneumatic logic valve are located in the conduction position, and the second pneumatic valve and the fourth pneumatic valve are located in the isolation position; in the emergency state, the first solenoid valve and the second solenoid valve are located in the isolation position, the first pneumatic logic valve and the second pneumatic logic valve are located in the conduction position, and the second pneumatic valve and the fourth pneumatic valve are located in the conduction position.

[0008] In some embodiments of the utility model, the first pneumatic valve is a two-position three-way valve. When the first pneumatic logic valve is in the isolation position, the first pneumatic valve is in the isolation position; when the first pneumatic logic valve is in the conduction position, the first pneumatic valve is in the conduction position.

[0009] In some embodiments of the utility model, the third pneumatic valve is a two-position five-way valve. When the second pneumatic logic valve is in the isolation position, the third pneumatic valve is in the first working position, and the turntable locking cylinder controls the turntable to be in an unlocked state; when the first pneumatic logic valve is in the conduction position, the third pneumatic valve is in the second working position, and the turntable locking cylinder controls the turntable to be in a locked state.

[0010] In some embodiments of the utility model, the third solenoid valve and the fourth solenoid valve are respectively two-position three-way valves. In an initial state, the third solenoid valve and the fourth solenoid valve are located in an isolated position; in an emergency state, one of the third solenoid valve and the fourth solenoid valve is in a conducting position, and the other remains in an isolated position.

[0011] In some embodiments of the utility model, the fifth pneumatic valve is a three-position five-way valve. When the fifth pneumatic valve is located in the first working position, the pneumatic motor rotates in the first direction. When the fifth pneumatic valve is located in the second working position, the pneumatic motor rotates in the second direction. When the fifth pneumatic valve is located in the third working position, the pneumatic motor stops rotating.

[0012] In some implementations of the utility model, when the third solenoid valve is in the on position, the fifth pneumatic valve is in the first working position, and when the fourth solenoid valve is in the on position, the fifth pneumatic valve is in the second working position.

[0013] In some embodiments of the utility model, the third pneumatic logic valve is a two-position five-way valve, the third solenoid valve controls the first air control port of the third pneumatic logic valve, the fourth solenoid valve controls the second air control port of the third pneumatic logic valve, when the third solenoid valve is in the on position, the third pneumatic logic valve is in the first working position and the air circuit is connected, when the fourth solenoid valve is in the on position, the third pneumatic logic valve is in the second working position and the air circuit is connected.

[0014] In some implementation modes of the utility model, the fifth solenoid valve is a two-position two-way valve. In an initial state, the fifth solenoid valve is in an isolation position. In an emergency state, the fifth solenoid valve is in a conduction position.

[0015] The technical solution of the utility model has the following technical effects compared with the prior art:

[0016] In the pneumatic control system of the continuous casting machine turntable provided by the utility model, the first valve group for controlling the brake cylinder and the second valve group for controlling the turntable locking cylinder both have pneumatic logic valves, which can be selectively connected to the first solenoid valve / the second solenoid valve or the second pneumatic valve / the fourth pneumatic valve to achieve reliable control of the brake cylinder and the turntable locking cylinder in both normal working and emergency states; at the same time, the third solenoid valve and the fourth solenoid valve in the third valve group for controlling the pneumatic motor can be driven by a backup power supply in an emergency, so that the pneumatic motor can operate reliably in an emergency state. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0018] Figure 1 The present invention is a system configuration diagram of the pneumatic control system of the continuous casting machine rotary table provided by the present invention. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] like Figure 1 The figure shows a specific implementation of the pneumatic control system of the continuous casting machine turntable provided by the utility model (hereinafter referred to as the pneumatic control system), which includes a brake cylinder 10, a turntable locking cylinder 20 and a pneumatic motor 30; specifically, under normal working conditions, the brake cylinder 10 is used to drive the brake to be in a released or braking state, wherein the brake is used for braking control of the turntable. The turntable locking cylinder 20 drives the turntable to be in a locked or released state, so that the turntable remains in a locked or released state; the pneumatic motor 30 is in a stopped state. Under emergency conditions, it is necessary to control the pneumatic motor 30 to rotate forward or reverse to make the turntable rotate forward or reverse, the turntable locking cylinder 20 drives the turntable to be in an unlocked state, and the brake cylinder 10 drives the brake to be in a released state, so that the equipment is in a non-braking state.

[0024] The pneumatic control system comprises a first valve group for controlling the brake cylinder 10, a second valve group for controlling the turntable locking cylinder 20, and a third valve group for controlling the pneumatic motor 30; and an air source assembly 40 for providing pressurized gas to the pneumatic system.

[0025] Among them, the first valve group includes a first pneumatic valve 501, a first solenoid valve 502, a second pneumatic valve 503 and a first pneumatic logic valve 512, and the outlet of the first pneumatic valve 501 is connected to the brake cylinder 10; the first solenoid valve 502 and the second pneumatic valve 503 are connected in parallel, and the outlets of the first solenoid valve 502 and the second pneumatic valve 503 are connected to the air control port of the first pneumatic valve 501 through the first pneumatic logic valve 512.

[0026] The second valve group includes a third pneumatic valve 504, a second solenoid valve 505, a fourth pneumatic valve 506 and a second pneumatic logic valve 507. The outlet of the third pneumatic valve 504 is connected to the turntable locking cylinder 20; the second solenoid valve 505 and the fourth pneumatic valve 506 are connected in parallel, and the outlets of the second solenoid valve 505 and the fourth pneumatic valve 506 are connected to the air control port of the third pneumatic valve 504 through the second pneumatic logic valve 507.

[0027] The third valve group includes a fifth pneumatic valve 508, a third solenoid valve 509 and a fourth solenoid valve 510, the outlet of the fifth pneumatic valve 508 is connected to the pneumatic motor 30, the outlet of the third solenoid valve 509 is connected to the first air control port of the fifth pneumatic valve 508, and the outlet of the fourth solenoid valve 510 is connected to the second air control port of the fifth pneumatic valve 508; wherein, the outlets of the third solenoid valve 509 and the fourth solenoid valve 510 are connected to the air control ports of the third pneumatic valve 504 and the fourth pneumatic valve 506 through the third pneumatic logic valve 513.

[0028] In the above-mentioned pneumatic system, the first valve group controlling the brake cylinder 10 and the second valve group controlling the turntable locking cylinder 20 both have pneumatic logic valves, which can be selectively connected to the first solenoid valve 502 / the second solenoid valve 505 or the second pneumatic valve 503 / the fourth pneumatic valve 506 to achieve reliable control of the brake cylinder 10 and the turntable locking cylinder 20 in both normal working conditions and emergency conditions (such as power outages); at the same time, the third solenoid valve 509 and the fourth solenoid valve 510 in the third valve group controlling the pneumatic motor 30 can be driven by a backup power supply in an emergency, so that the pneumatic motor 30 can operate reliably in an emergency state.

[0029] Specifically, in an optional embodiment, the gas control system further includes a fifth solenoid valve 511 for opening or cutting off the air intake pipeline of the third solenoid valve 509 and the fourth solenoid valve 510, that is, the outlet of the fifth solenoid valve 511 is connected to the inlet of the third solenoid valve 509 and the fourth solenoid valve 510. More specifically, the fifth solenoid valve 511 is used as a main switch valve of the emergency pipeline, and the fifth solenoid valve 511 is a two-position two-way valve. In the initial state, the fifth solenoid valve 511 is in the isolation position, and in the emergency state, the fifth solenoid valve 511 is in the conduction position.

[0030] Specifically, in an optional embodiment, the first solenoid valve 502 and the second solenoid valve 505 are respectively two-position three-way valves, the second pneumatic valve 503 and the fourth pneumatic valve 506 are respectively two-position three-way valves, and the first pneumatic logic valve 512 and the second pneumatic logic valve 507 are respectively two-position three-way valves; the outlets of the first solenoid valve 502 and the second pneumatic valve 503 are respectively connected to the inlet and the air control port of the first pneumatic logic valve 512, and the outlets of the second solenoid valve 505 and the fourth pneumatic valve 506 are respectively connected to the inlet and the air control port of the second pneumatic logic valve 507.

[0031] In the initial state, the first solenoid valve 502 and the second solenoid valve 505 are in the isolation position, the second pneumatic valve 503 and the fourth pneumatic valve 506 are two-position three-way valves in the isolation position, and the first pneumatic logic valve 512 and the second pneumatic logic valve 507 are in the isolation position; in the normal working state, the first solenoid valve 502 and the second solenoid valve 505 are energized and in the conduction position, the first pneumatic logic valve 512 and the second pneumatic logic valve 507 are in the conduction position, and the second pneumatic valve 503 and the fourth pneumatic valve 506 are in the isolation position; in the emergency state, the first solenoid valve 502 and the second solenoid valve 505 are in the isolation position, the first pneumatic logic valve 512 and the second pneumatic logic valve 507 are in the conduction position, and the second pneumatic valve 503 and the fourth pneumatic valve 506 are in the conduction position. Through the use of the above-mentioned first pneumatic logic valve 512 and the second pneumatic logic valve 507, the conduction between the first solenoid valve 502 / the second solenoid valve 505 and the first pneumatic valve 501 / the third pneumatic valve 504 is achieved in the working state, and the conduction between the second pneumatic valve 503 / the fourth pneumatic valve 506 and the first pneumatic valve 501 / the third pneumatic valve 504 is achieved in the emergency state.

[0032] Specifically, in an optional embodiment, the brake cylinder 10 is a single-acting cylinder, and the first pneumatic valve 501 is a two-position three-way valve, whose outlet is connected to a chamber on one side of the brake cylinder 10 where no spring is provided, and the outlet of the first pneumatic logic valve 512 is connected to the air control port of the first pneumatic valve 501. When the first pneumatic logic valve 512 is in an isolation position, the first pneumatic valve 501 is in the isolation position, and the brake cylinder 10 is in an initial position under the action of the spring; when the first pneumatic logic valve 512 is in a conduction position, the first pneumatic valve 501 is in the conduction position, and the brake cylinder 10 is actuated under the action of pressurized gas to switch the brake to a released state.

[0033] Specifically, in an optional embodiment, the turntable locking cylinder 20 is a double-acting cylinder, the third pneumatic valve 504 is a two-position five-way valve, and when the second pneumatic logic valve 507 is in the isolation position, the third pneumatic valve 504 is in the first working position, and the turntable locking cylinder 20 is actuated (extended or retracted) to control the turntable to be in an unlocked state; when the first pneumatic logic valve 512 is in the conduction position, the third pneumatic valve 504 is in the second working position, and the turntable locking cylinder 20 (retracted or extended) controls the turntable to be in a locked state.

[0034] Specifically, in an optional embodiment, the fifth pneumatic valve 508 is a three-position five-way valve. When the fifth pneumatic valve 508 is located in the first working position, the pneumatic motor 30 rotates in the first direction. When the fifth pneumatic valve 508 is located in the second working position, the pneumatic motor 30 rotates in the second direction. When the fifth pneumatic valve 508 is located in the third working position, the pneumatic motor 30 stops rotating. When the third solenoid valve 509 is in the conducting position, the fifth pneumatic valve 508 is in the first working position. When the fourth solenoid valve 510 is in the conducting position, the fifth pneumatic valve 508 is in the second working position.

[0035] Specifically, the third solenoid valve 509 and the fourth solenoid valve 510 are respectively two-position three-way valves. In the initial state, the third solenoid valve 509 and the fourth solenoid valve 510 are located in the isolation position; in the emergency state, one of the third solenoid valve 509 and the fourth solenoid valve 510 is in the conduction position, and the other remains in the isolation position. For example, when the motor is required to rotate in a first direction, the third solenoid valve 509 is controlled to be energized so that the third solenoid valve 509 is connected to the first air control port of the fifth pneumatic valve 508 to drive the pneumatic motor 30 to rotate in the first direction; when the motor is required to rotate in the second direction, the fourth solenoid valve 510 is controlled to be energized so that the fourth solenoid valve 510 is connected to the second air control port of the fifth pneumatic valve 508 to drive the pneumatic motor 30 to rotate in the second direction.

[0036] Specifically, the third pneumatic logic valve 513 is a two-position five-way valve, the third solenoid valve 509 controls the first air control port of the third pneumatic logic valve 513, and the fourth solenoid valve 510 controls the second air control port of the third pneumatic logic valve 513. Specifically, one path of the outlet pipeline of the third solenoid valve 509 is connected to the first inlet of the third pneumatic logic valve 513, and the other path is connected to the first air control port of the third pneumatic logic valve 513; one path of the outlet pipeline of the fourth solenoid valve 510 is connected to the second inlet of the third pneumatic logic valve 513, and the other path is connected to the second air control port of the third pneumatic logic valve 513.

[0037] When the third solenoid valve 509 is in the on position, the third pneumatic logic valve 513 is in the first working position and the gas circuit is connected; when the fourth solenoid valve 510 is in the on position, the third pneumatic logic valve 513 is in the second working position and the gas circuit is connected.

[0038] The working process of the above gas control system is as follows:

[0039] In the normal working state, in one case, the first solenoid valve 502 and the second solenoid valve 505 are energized and are in the conducting position respectively; the first pneumatic logic valve 512 and the second pneumatic logic valve 507 are in the conducting position respectively, and then the first pneumatic valve 501 and the third pneumatic valve 504 are in the conducting position, the brake cylinder 10 and the turntable locking cylinder 20 are actuated, so that the brake is in the released state and the turntable is in the locked position. In another case, the first solenoid valve 502 loses power, the first pneumatic logic valve 512 is in the disconnected position, and then the first pneumatic valve 501 is in the disconnected position, the brake cylinder 10 returns to the initial position under the action of the spring, and the brake is in the braking state; the second solenoid valve 505 loses power, the second pneumatic logic valve 507 is in the disconnected position, the third pneumatic valve 504 is in the disconnected position, and the turntable locking cylinder 20 is actuated, so that the turntable is in the unlocked position.

[0040] When a power outage occurs, the pneumatic control system is in an emergency state, at which time, the first solenoid valve 502 and the second solenoid valve 505 are powered off. The fifth solenoid valve 511 of the backup power supply supplies power, and selectively supplies power to the third solenoid valve 509 and the fourth solenoid valve 510, so that the pneumatic motor 30 rotates in the first direction or the second direction. Since the third solenoid valve 509 or the fourth solenoid valve 510 is powered, the third pneumatic logic valve 513 can achieve air circuit conduction, which can drive the second pneumatic valve 503 and the fourth pneumatic valve 506 to be in a conducting state, and then continue to control the brake cylinder 10 and the turntable locking cylinder 20 to operate, so that the brake is in a released state and the turntable is in an unlocked state.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A gas control system for a continuous casting machine rotary table, characterized in that: include: Brake cylinder, turntable locking cylinder and pneumatic motor; A first valve group for controlling the brake cylinder, the first valve group comprising a first pneumatic valve, a first solenoid valve, a second pneumatic valve and a first pneumatic logic valve, the outlet of the first pneumatic valve being connected to the brake cylinder; the first solenoid valve and the second pneumatic valve being connected in parallel, the outlets of the first solenoid valve and the second pneumatic valve being connected to the air control port of the first pneumatic valve through the first pneumatic logic valve; A second valve group for controlling the turntable locking cylinder, wherein the second valve group includes a third pneumatic valve, a second solenoid valve, a fourth pneumatic valve and a second pneumatic logic valve, wherein the outlet of the third pneumatic valve is connected to the turntable locking cylinder; the second solenoid valve is connected in parallel with the fourth pneumatic valve, and the outlets of the second solenoid valve and the fourth pneumatic valve are connected to the air control port of the third pneumatic valve through the second pneumatic logic valve; a third valve group for controlling the pneumatic motor, the third valve group comprising a fifth pneumatic valve, a third solenoid valve and a fourth solenoid valve, the outlet of the fifth pneumatic valve being in communication with the pneumatic motor, the outlet of the third solenoid valve being in communication with the first air control port of the fifth pneumatic valve, and the outlet of the fourth solenoid valve being in communication with the second air control port of the fifth pneumatic valve; The outlets of the third solenoid valve and the fourth solenoid valve are connected to the air control ports of the third pneumatic valve and the fourth pneumatic valve through the third pneumatic logic valve.

2. The pneumatic control system for a continuous casting machine turntable according to claim 1, characterized in that: The system further comprises a fifth solenoid valve, wherein an outlet of the fifth solenoid valve is in communication with an inlet of the third solenoid valve and an inlet of the fourth solenoid valve.

3. The pneumatic control system for a continuous casting machine turntable according to claim 2, characterized in that: The first solenoid valve and the second solenoid valve are two-position three-way valves, the second pneumatic valve and the fourth pneumatic valve are two-position three-way valves, and the first pneumatic logic valve and the second pneumatic logic valve are two-position three-way valves; In the initial state, the first solenoid valve and the second solenoid valve are located in the isolation position, the second pneumatic valve and the fourth pneumatic valve are two-position three-way valves located in the isolation position, and the first pneumatic logic valve and the second pneumatic logic valve are located in the isolation position; Under normal working conditions, the first solenoid valve and the second solenoid valve are in the conducting position, the first pneumatic logic valve and the second pneumatic logic valve are in the conducting position, and the second pneumatic valve and the fourth pneumatic valve are in the isolation position; In an emergency state, the first solenoid valve and the second solenoid valve are located in an isolation position, the first pneumatic logic valve and the second pneumatic logic valve are located in a conduction position, and the second pneumatic valve and the fourth pneumatic valve are located in a conduction position.

4. The pneumatic control system for a continuous casting machine turntable according to claim 3, characterized in that: The first pneumatic valve is a two-position three-way valve. When the first pneumatic logic valve is in the isolation position, the first pneumatic valve is in the isolation position. When the first pneumatic logic valve is in the conduction position, the first pneumatic valve is in the conduction position.

5. The pneumatic control system for a continuous casting machine turntable according to claim 3, characterized in that: The third pneumatic valve is a two-position five-way valve. When the second pneumatic logic valve is in the isolation position, the third pneumatic valve is in the first working position, and the turntable locking cylinder controls the turntable to be in an unlocked state; when the first pneumatic logic valve is in the conduction position, the third pneumatic valve is in the second working position, and the turntable locking cylinder controls the turntable to be in a locked state.

6. The pneumatic control system for a continuous casting machine turntable according to claim 1, characterized in that: The third solenoid valve and the fourth solenoid valve are respectively two-position three-way valves. In an initial state, the third solenoid valve and the fourth solenoid valve are located in an isolated position. In an emergency state, one of the third solenoid valve and the fourth solenoid valve is in a conducting position, and the other remains in an isolated position.

7. The pneumatic control system for a continuous casting machine turntable according to claim 1, characterized in that: The fifth pneumatic valve is a three-position five-way valve. When the fifth pneumatic valve is located in the first working position, the pneumatic motor rotates in the first direction. When the fifth pneumatic valve is located in the second working position, the pneumatic motor rotates in the second direction. When the fifth pneumatic valve is located in the third working position, the pneumatic motor stops rotating.

8. The pneumatic control system for a continuous casting machine turntable according to claim 7, characterized in that: When the third solenoid valve is in the on position, the fifth pneumatic valve is in the first working position, and when the fourth solenoid valve is in the on position, the fifth pneumatic valve is in the second working position.

9. The gas control system for the continuous casting machine turntable according to claim 8, characterized in that: The third pneumatic logic valve is a two-position five-way valve. The third solenoid valve controls the first air control port of the third pneumatic logic valve, and the fourth solenoid valve controls the second air control port of the third pneumatic logic valve. When the third solenoid valve is in the on position, the third pneumatic logic valve is in the first working position and the air circuit is connected. When the fourth solenoid valve is in the on position, the third pneumatic logic valve is in the second working position and the air circuit is connected.

10. The gas control system for the continuous casting machine turntable according to claim 2, characterized in that: The fifth solenoid valve is a two-position, two-way valve. In an initial state, the fifth solenoid valve is in an isolation position. In an emergency state, the fifth solenoid valve is in a conduction position.

Images