Hollow cylinder

Abstract

The utility model discloses a hollow air cylinder and relates to a piston rod, the piston rod is hollow, can extend out of air cylinder flange covers at two ends of an air cylinder barrel and can retract, one end of the hollow piston rod is provided with a connecting flange used for being connected with a pressure water pipe, and the other end of the hollow piston rod is provided with pipe threads used for installing a nozzle. The beneficial effects of the utility model are that: spray stretches out during cooling and retracts after spraying is stopped, and is not easy to damage; the device can be industrially produced, is high in automation degree, convenient to arrange, good in spray cooling, safe, reliable and convenient to maintain and replace, and reduces the production cost.

Description

Technical Field

[0001] This utility model relates to a pneumatic actuator, specifically a medium-capacity air cylinder. Its piston rod is hollow, used to pass media such as water and air. Background Technology

[0002] Existing methods for cooling blast furnaces by spraying water mist on the furnace top mostly involve fixed spraying devices installed at the furnace throat or above the furnace top steel ring. Because these nozzles are easily damaged by the impact of falling ore and coal during the blast furnace charging process, frequent replacements are not only costly but also disrupt production, making improvement essential. Summary of the Invention

[0003] In view of the shortcomings and deficiencies of the above-mentioned blast furnace top spray cooling equipment, this utility model provides a medium-air cylinder that extends during spray cooling and retracts after spraying stops, making it less prone to damage; it can be factory-produced, has a high degree of automation, is easy to arrange, provides good spray cooling, and is safe and reliable.

[0004] To achieve the above objectives, the technical solution of this utility model is a medium-capacity air cylinder, involving a piston rod, characterized in that: the piston rod is a hollow cylinder flange cover that can extend out of both ends of the cylinder barrel and can retract; one end of the piston rod is provided with a connecting flange for connecting a pressure water pipe, and the other end is provided with a pipe thread for installing a nozzle.

[0005] The advantages of this invention are that it extends during spray cooling and retracts after spraying stops, making it less prone to damage; it can be factory-produced, has a high degree of automation, is easy to arrange, provides good spray cooling, is safe and reliable, is easy to maintain and replace, and reduces production costs. Attached Figure Description

[0006] Figure 1 This is the front view of the present utility model.

[0007] Figure 2 This is a schematic diagram of the on-site assembly of this utility model.

[0008] In the picture:

[0009] 1. Piston rod;

[0010] 2. Flange cover;

[0011] 3. Cylinder barrel;

[0012] 4. Connecting screw;

[0013] 5. Install flange on end face;

[0014] 6. Sealing ring;

[0015] 7. Compressed air inlet and outlet;

[0016] 8. Connecting flange

[0017] 9. Pipe threads;

[0018] 10. Water pipes;

[0019] 11. Pneumatic solenoid valve connector;

[0020] 12. Install the flange;

[0021] 13. Blast furnace throat area (furnace shell);

[0022] 14. Nozzle. Detailed Implementation

[0023] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1 and Figure 2 As shown, this utility model discloses a medium-air cylinder, which is an improvement and innovation of a common cylinder. It includes a cylinder barrel 3, a piston rod 1, a connecting screw 4, a flange cover 2, a compressed air inlet and outlet 7, a sealing ring 6, and an end face mounting flange 5. The piston rod is hollow and can extend out of the cylinder flange cover 3 at both ends of the cylinder barrel and retract. One end of the hollow piston rod is provided with a connecting flange 8 for connecting a pressure water pipe 10, and the other end is provided with a pipe thread 9 for installing a nozzle 14.

[0026] This invention changes the solid piston rod of a conventional cylinder to a hollow one, enabling it to play a particularly effective role in specific situations.

[0027] This utility model is installed on the furnace shell 13 at the throat of the blast furnace via the end face mounting flange 5 and the mounting flange 12. Its hollow piston rod can extend into the furnace shell. A solenoid valve is connected to the pneumatic solenoid valve connector 11 to control the operation of the cylinder.

[0028] This utility model is used for spray cooling on the top of blast furnaces. It extends during spray cooling and retracts after spraying stops, making it less prone to damage and reducing production costs. It can be mass-produced in factories, has a high degree of automation, is easy to arrange, provides good spray cooling, and is safe and reliable.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air cylinder, relating to a piston rod, characterized in that: The piston rod is hollow and can extend out of the cylinder flange cover at both ends of the cylinder barrel and can retract. One end of the piston rod is provided with a connecting flange for connecting a pressure water pipe, and the other end is provided with a pipe thread for installing a nozzle.

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