Fixed-length flying shear and brake pneumatic control device thereof

Abstract

The utility model provides a fixed-length flying shear and a pneumatic control device of a brake of the fixed-length flying shear. The brake pneumatic control device of the fixed-length flying shear comprises a pressure increasing valve, an air storage tank and an electromagnetic valve which are sequentially connected through a pipeline, an outlet of the electromagnetic valve is connected with an air inlet of a brake, the air storage tank is used for storing compressed air, and the air inlet end of the pressure increasing valve is connected with an air source. According to the pneumatic control device of the brake, gas is stored in the gas storage tank after being pressurized through the pressure increasing valve, so that when the brake is used, the gas storage tank can provide more high-pressure gas, rated pressure can be achieved only when a cavity in the brake is filled with the high-pressure gas, and time is needed for the gas to enter the cavity of the brake. When the air enters, the air pressure needs time to be built, the brake can build pressure more quickly through the air storage tank, and therefore the braking precision and the braking speed are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for shearing machines, in particular to a fixed-length flying shear and a pneumatic control device for its brake. Background Art

[0002] At present, in the strip steel production and processing line in the metallurgical industry, the need for fixed-length shearing of strip steel is extensive, especially the shearing accuracy for high-precision fixed-length shearing is getting higher and higher. The shearing accuracy of a fixed-length flying shear is highly related to the control accuracy of the clutch and the brake.

[0003] In the prior art, electric brakes are usually adopted for fixed-length flying shears. However, electric brakes have problems such as poor braking accuracy and long braking time. Although some flying shears adopt pneumatic brakes, the existing pneumatic brakes also have the problem of long braking time. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a fixed-length flying shear and a pneumatic control device for its brake, aiming to improve the braking speed and braking accuracy of the flying shear brake.

[0005] To achieve the above purpose, the utility model provides a pneumatic control device for the brake of a fixed-length flying shear, which includes a pressure-increasing valve, an air storage tank, and a solenoid valve connected in sequence through pipelines. The outlet of the solenoid valve is connected to the air inlet of the brake. The air storage tank is used for storing compressed air, and the air inlet end of the pressure-increasing valve is connected to the air source.

[0006] Preferably, the pneumatic control device for the brake of the fixed-length flying shear further includes a quick exhaust valve installed at the air source outlet of the brake for quickly releasing the gas in the brake.

[0007] Preferably, the pneumatic control device for the brake of the fixed-length flying shear further includes a pneumatic triple unit located on the inlet side of the pressure-increasing valve. The pneumatic triple unit includes an air filter, a pressure-reducing valve, and an oiler connected in sequence.

[0008] Preferably, the pneumatic control device for the brake of the fixed-length flying shear further includes a pressure-reducing valve for reducing the pressure in the pipeline, and the pressure-reducing valve is located between the air storage tank and the solenoid valve.

[0009] Preferably, the pneumatic control device for the brake of the fixed-length flying shear further includes a pressure switch for detecting the pressure in the pipeline.

[0010] Preferably, the pressure switch is located between the brake and the solenoid valve.

[0011] Preferably, the gas storage capacity of the air storage tank is not less than four times the gas volume required for the brake to act.

[0012] Preferably, the pneumatic control device of the fixed-length flying shear further includes a controller, which is electrically connected to the solenoid valve and the pressure switch.

[0013] The present utility model also proposes a fixed-length flying shear, which includes a flying shear body and a brake connected to the flying shear body, and also includes the above-mentioned pneumatic control device of the brake, and the pneumatic control device of the brake is connected to the brake.

[0014] In the pneumatic control device of the brake proposed by the present utility model, after being pressurized by a pressure increasing valve, the gas is stored in the air storage tank. In this way, when the brake is in use, the air storage tank can provide a relatively large amount of high-pressure gas. Only when the cavity in the brake is filled with high-pressure gas can the rated pressure be achieved. Since it takes time for the gas to enter the cavity of the brake and it takes time for the air pressure to build up as the gas enters, the air storage tank enables this brake to build pressure faster, thereby improving the braking accuracy and braking speed (braking can only be achieved after the braking pressure is built up. If only a pneumatic pipeline supplies gas, it takes a longer time to build pressure, and the process of building pressure cannot be calculated, or it cannot be calculated accurately at all. If the time to build pressure is inaccurate, the braking accuracy will not be so accurate). In addition, the pneumatic control device of this brake has the advantages of simple structure, stable and reliable operation, and easy implementation. Brief Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a preferred embodiment of the pneumatic control device of the brake of the fixed-length flying shear of the present utility model.

[0016] In the figure, 1 - pneumatic triple unit, 2 - pressure increasing valve, 3 - air storage tank, 4 - pressure reducing valve, 5 - solenoid valve, 6 - pressure switch, 7 - brake, 8 - quick exhaust valve.

[0017] The realization, functional characteristics and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0018] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0020] The present utility model provides a pneumatic control device for the brake of a fixed-length flying shear.

[0021] Referring to Figure 1 , in this preferred embodiment, a pneumatic control device for the brake of a fixed-length flying shear includes a pressure increasing valve 2, an air storage tank 3, and an electromagnetic valve 5 connected in sequence through a pipeline. The outlet of the electromagnetic valve 5 is connected to the air inlet of the brake 7. The air storage tank 3 is used to store compressed air, and the air inlet end of the pressure increasing valve 2 is connected to the air source.

[0022] The braking torque of the brake 7 is proportional to the air pressure. The rated air pressure of the brake 7 is generally higher than the main line air supply pressure. By setting the pressure increasing valve 2 in front of the air storage tank 3, the air pressure of the brake 7 is increased. The pressure increasing valve 2 generally doubles or quadruples the inlet air pressure.

[0023] Furthermore, the pneumatic control device for the brake of this fixed-length flying shear further includes a quick exhaust valve 8 installed on the air source outlet of the brake 7 for quickly releasing the gas in the brake 7.

[0024] Furthermore, the pneumatic control device for the brake of this fixed-length flying shear further includes a pneumatic triple unit 1 located on the inlet side of the pressure increasing valve 2. The pneumatic triple unit 1 includes an air filter, a pressure reducing valve 4, and an oiler connected in sequence. By setting the pneumatic triple unit 1, a clean air source is provided for the brake 7.

[0025] Furthermore, the pneumatic control device for the brake of this fixed-length flying shear further includes a pressure reducing valve 4 for reducing the pressure in the pipeline. The pressure reducing valve 4 is located between the air storage tank 3 and the electromagnetic valve 5. By adjusting the pressure reducing valve 4, the braking torque of the brake 7 can be adjusted.

[0026] The rated air pressure of the brake 7 is 0.7 Mpa, the braking torque is 70 kN, the maximum allowable air pressure is 1 Mpa. The air source in the steel mill is generally between 0.4 and 0.6 MPa, which is related to the air source configuration of the steel mill and also has a certain relationship with the distance between the user point and the air source. Therefore, a double-increasing valve is adopted. After pressurization, the pressure in the air storage tank 3 is between 0.8 and 1.2 MPa. (This is determined according to the rated pressure or the operating pressure of the brake. The conventional air source configuration in the steel mill is between 0.4 and 0.6 MPa, so only pressurization can meet the usage requirements.) Therefore, the pressure reducing valve 4 at the outlet of the air storage tank adjusts the pressure to 0.7 Mpa.

[0027] Furthermore, the pneumatic control device of the fixed-length flying shear for the brake further includes a pressure switch 6 for detecting the pressure in the pipeline. The pressure switch 6 is located between the brake 7 and the solenoid valve 5. The pressure switch 6 is an inspection element for detecting the pipeline pressure and also an auxiliary element for confirming the completion of the action of the brake 7 (judging whether the ability of the brake 7 has been fully exerted by detecting the pressure).

[0028] Furthermore, the gas storage capacity of the air storage tank 3 is not less than four times the gas volume required for the action of the brake 7. For example, the rated restart volume of the brake 7 is 5 L, so the volume of the selected air storage tank 3 is 20 L. The brake 7 needs to be refilled with 5 L of gas to achieve the rated load.

[0029] Furthermore, the pneumatic control device of the fixed-length flying shear for the brake further includes a controller, and the controller is electrically connected to the solenoid valve 5 and the pressure switch 6. Automatic control is achieved by setting the controller.

[0030] The working principle of this pneumatic control device for the brake is as follows: The gas provided by the air source is purified by the pneumatic triple unit 1 and then enters the air storage tank 3 for storage through the adjustment of the pressure increasing valve 2 and the pressure reducing valve 4. When the brake 7 needs to act, the solenoid valve 5 is opened to enable the gas in the air storage tank 3 to quickly enter the brake 7, thereby achieving fast and precise braking of the flying shear. When the braking is over, the solenoid valve 5 acts to cut off the air supply, and the gas in the brake 7 is quickly released through the quick exhaust valve 8, and the brake 7 cancels the braking.

[0031] The brake pneumatic control device proposed in this embodiment pressurizes the gas through the pressure booster valve 2 and then stores the gas in the gas storage tank 3. In this way, when the brake 7 is in use, the gas storage tank 3 can provide a relatively large amount of high-pressure gas. Only when the cavity in the brake is filled with high-pressure gas can the rated pressure be achieved. Since it takes time for the gas to enter the cavity of the brake and for the air pressure to build up as the gas enters, the gas storage tank 3 enables this brake to build pressure faster, thereby improving the braking accuracy and braking speed (braking can only be achieved after the braking pressure is built up. If only a pneumatic pipeline supplies gas, the time to build pressure is longer, and the process of building pressure cannot be calculated, or it cannot be calculated accurately at all. If the time to build pressure is inaccurate, the braking accuracy will not be so accurate). In addition, the brake pneumatic control device of the present invention has the advantages of simple structure, stable and reliable operation, and easy implementation.

[0032] The present utility model further proposes a fixed-length flying shear.

[0033] In this preferred embodiment, a fixed-length flying shear includes a flying shear body and a brake connected to the flying shear body, and further includes a brake pneumatic control device, and the brake pneumatic control device is connected to the brake. For the specific structure and beneficial effects of the brake pneumatic control device, refer to the above embodiment and will not be elaborated here.

[0034] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A pneumatic control device for a brake of a fixed-length flying shear, characterized in that: It includes a boosting valve, an air tank and a solenoid valve connected in sequence through a pipeline, the outlet of the solenoid valve is connected to the air inlet of the brake, the air tank is used to store compressed air, the air inlet end of the boosting valve is connected to the air source, and the brake pneumatic control device also includes a quick exhaust valve installed on the brake air source outlet for quickly releasing the gas in the brake; the brake pneumatic control device also includes a pneumatic triplet located on the inlet side of the boosting valve, the pneumatic triplet includes an air filter, a pressure reducing valve and an oil mist collector connected in sequence; the brake pneumatic control device also includes a pressure reducing valve for reducing the pressure in the pipeline, and the pressure reducing valve is located between the air tank and the solenoid valve; the brake pneumatic control device also includes a pressure switch for detecting the pressure in the pipeline.

2. The pneumatic control device for the brake of the fixed-length flying shear according to claim 1, characterized in that: It also includes a pneumatic triplet located at the inlet side of the boost valve, and the pneumatic triplet includes an air filter, a pressure reducing valve and an oil mist collector which are connected in sequence.

3. The pneumatic control device for the brake of the fixed-length flying shear according to claim 1, characterized in that: The pressure switch is located between the brake and the solenoid valve.

4. The pneumatic control device for the brake of a fixed-length flying shear according to any one of claims 1 to 3, characterized in that: The gas storage capacity of the gas storage tank is not less than four times the gas volume required for the brake action.

5. The pneumatic control device for the brake of the fixed-length flying shear according to claim 1, characterized in that: The device also includes a controller which is electrically connected to the solenoid valve and the pressure switch.

6. A fixed-length flying shear, comprising a flying shear body and a brake connected to the flying shear body, characterized in that: It also includes a brake pneumatic control device as described in any one of claims 1 to 5, and the brake pneumatic control device is connected to the brake.

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