Cold rolling partition cooling injection valve testing device

Abstract

The utility model relates to a cold rolling partition cooling injection valve testing device, and belongs to the technical field of rolling mill equipment maintenance devices. According to the technical scheme, an injection valve (10) is installed in a valve block (11), an air pipe connecting block (6) is installed at the front end of the valve block (11), a nozzle connecting block (7) is installed at the rear end of the valve block (11), the air pipe connecting block (6) is connected with a pneumatic reversing valve (2) through an air pipe (5), and a PLC (1) is connected with the pneumatic reversing valve (2) through a control line (3). The utility model has the beneficial effects that the injection valve is tested by adopting the valve block with the air pipe connecting block and the nozzle connecting block, the structure is simple, the use is convenient, and the multi-zone cooling injection valve which is repaired after being off-machine can be used again after passing an off-line injection test and being qualified.

Description

Technical Field

[0001] The utility model relates to a cold rolling partition cooling injection valve testing device, belonging to the technical field of rolling mill equipment maintenance devices. Background Technique

[0002] During the cold rolling of strip steel, in order to cool the rolling rolls and reduce the rolling force, emulsion needs to be injected during rolling. In rolling, in order to improve the plate shape, generally the emulsion partition cooling control technology is adopted. The working principle of the partition cooling technology is to utilize the principle of thermal expansion and contraction, and by changing the emulsion injection amount in different areas, to achieve the purpose of accurately controlling the plate shape point by point. The emulsion partition cooling system is mainly composed of E and F series nozzles. Among them, the E series nozzles are distributed on the upper and lower spray beams. 40 groups of injection valves are installed on each spray beam, and their lengths respectively correspond to the roll body lengths of the upper and lower working rolls. The F series nozzles are also divided into upper and lower spray beams. 40 groups of injection valves are installed on each spray beam to mainly control the partition cooling of the rolled strip. The injection valve is installed in the emulsion spray beam, an air pipe connection block is installed behind the injection valve, and a nozzle connection block is installed at the front end. The emulsion enters the injection valve through the holes in the spray beam. When it is necessary to cut off this injection valve, the control air pipe is ventilated, the air pressure acts on the valve core, and the combined action of the air pressure makes the valve core act reversely to cut off the emulsion, so as to achieve the purpose of accurately controlling the emulsion injection amount in different areas. However, it is found in use that during the operation of the multi-zone cooling system, the valve core seal is extremely easy to be damaged, resulting in the emulsion pouring back to the air pipe side, and further causing the failure of the emulsion multi-zone cooling control. In order to ensure the normal opening and closing of the injection valve core. Before the injection valve is installed on the machine, the action of each injection valve needs to be tested, and it can be installed on the machine only after passing the test, so as to avoid the instability of the emulsion partition cooling system control caused by quality problems in the processing and assembly of the injection valve, which seriously affects the plate shape control. Content of the Utility Model

[0003] The purpose of the utility model is to provide a cold rolling partition cooling injection valve testing device. By using a valve block with an air pipe connection block and a nozzle connection block to test the injection valve, the structure is simple and easy to use, and it can ensure that the multi-zone cooling injection valve after being repaired offline can be reinstalled on the machine only after passing the offline injection test; at the same time, according to the need, one pneumatic reversing valve can be used to control multiple injection valves, or one pneumatic reversing valve can be used to control one injection valve, so as to realize the pre-installation test of the pneumatic reversing valve while testing the injection valve, thus avoiding the instability of the emulsion partition cooling system control caused by quality problems in the processing and assembly of the injection valve and the pneumatic reversing valve, which affects the plate shape control and further affects the efficient operation of the cold rolling mill production, and solves the above problems existing in the background technique.

[0004] The technical solution of the present utility model is: a cold rolling partition cooling spray valve testing device, which includes a PLC controller, a pneumatic reversing valve, a power control line, an air pipe, an air pipe connection block, a nozzle connection block, a spray valve and a valve block. The spray valve is installed in the valve block, the air pipe connection block is installed at the front end of the valve block, the nozzle connection block is installed at the rear end of the valve block, the air pipe connection block and the pneumatic reversing valve are connected through an air pipe, and the PLC controller and the pneumatic reversing valve are connected through a control line.

[0005] The valve block is of a hollow structure, and an emulsion liquid inlet joint is installed at the upper end of the valve block, and the emulsion liquid inlet joint is communicated with the hollow part.

[0006] The valve block is provided with holes, and the structural dimensions of the holes are matched with the structural dimensions of the spray valve installed on the emulsion liquid spray beam. The spray valve is installed in the valve block through the holes.

[0007] There are twelve such holes.

[0008] It also includes an air pipe connection block installation threaded hole and a valve block connection block threaded hole. The air pipe connection block installation threaded hole is arranged at the front end of the valve block, and the valve block connection block threaded hole is arranged at the rear end of the valve block. The air pipe connection block is installed in the air pipe connection block installation threaded hole using screws, and the nozzle connection block is fixed in the valve block connection block threaded hole using screws.

[0009] The air pipe connection block is provided with an exhaust muffler and an air source joint, and the exhaust muffler and the air source joint are arranged at the bottom of the air pipe connection block.

[0010] The beneficial effect of the present utility model is: by using a valve block with an air pipe connection block and a nozzle connection block to test the spray valve, the structure is simple and easy to use, which can ensure that the multi-zone cooling spray valve after repair can be reinstalled on the machine only after passing the offline spray test; at the same time, according to needs, one pneumatic reversing valve can be used to control multiple spray valves, or one pneumatic reversing valve can be used to control one spray valve, so as to realize the pre-installation test of the pneumatic reversing valve while testing the spray valve, thus avoiding the instability of the emulsion liquid partition cooling system control caused by quality problems in the processing and assembly of the spray valve and the pneumatic reversing valve, resulting in unstable plate shape control and affecting the efficient operation of the cold rolling mill production. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the installation of the spray valve in the spray beam of the rolling mill in the background technology of the present utility model;

[0012] Figure 2 is a schematic overall structural diagram of the present utility model;

[0013] Figure 3 is a schematic installation diagram of the spray valve 10 in the valve block 11 of the present utility model;

[0014] In the figure: PLC controller 1, pneumatic reversing valve 2, power control line 3, exhaust muffler 4, air pipe 5, air pipe connection block 6, nozzle connection block 7, air source connector 8, inlet emulsion liquid connector 9, injection valve 10, valve block 11, air pipe connection block installation threaded hole 12, valve block connection block threaded hole 13, nozzle 14, control air pipe 15. Specific implementation method

[0015] In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments. Obviously, the described embodiments are a small part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present utility model.

[0016] A cold rolling sectional cooling injection valve test device includes a PLC controller 1, a pneumatic reversing valve 2, a power control line 3, an air pipe 5, an air pipe connection block 6, a nozzle connection block 7, an injection valve 10 and a valve block 11. The injection valve 10 is installed in the valve block 11. The air pipe connection block 6 is installed at the front end of the valve block 11, and the nozzle connection block 7 is installed at the rear end of the valve block 11. The air pipe connection block 6 and the pneumatic reversing valve 2 are connected through the air pipe 5, and the PLC controller 1 and the pneumatic reversing valve 2 are connected through the control line 3.

[0017] The valve block 11 is of a hollow structure. An inlet emulsion liquid connector 9 is installed at the upper end of the valve block 11, and the inlet emulsion liquid connector 9 is communicated with the hollow part.

[0018] The valve block is provided with holes, and the structural dimensions of the holes match the structural dimensions of the injection valve installed on the emulsion liquid spray beam. The injection valve 10 is installed in the valve block 11 through the holes.

[0019] There are twelve such holes.

[0020] It also includes an air pipe connection block installation threaded hole 12 and a valve block connection block threaded hole 13. The air pipe connection block installation threaded hole 12 is arranged at the front end of the valve block 11, and the valve block connection block threaded hole 13 is arranged at the rear end of the valve block 11. The air pipe connection block 6 is installed in the air pipe connection block installation threaded hole 12 using screws, and the nozzle connection block 7 is fixed in the valve block connection block threaded hole 13 using screws.

[0021] An exhaust muffler 4 and an air source connector 8 are provided on the air pipe connection block 6, and the exhaust muffler 4 and the air source connector 8 are arranged at the bottom of the air pipe connection block 6.

[0022] In practical applications, the valve block 11 can simultaneously install and test twelve injection valves. One pneumatic reversing valve can be used to control multiple injection valves, or one pneumatic reversing valve can be used to control one injection valve. The injection valve 10 is installed in the valve block 11, and the air pipe connection block 6 and the nozzle pressing block 7 are fixed to the front and rear sides of the valve block 11 with screws. The valve block 11 is a hollow structure. The emulsion enters the valve block 11 from the emulsion inlet joint 9 at the top of the valve block 11 and is ejected from the nozzle connected to the nozzle connection block 7. During the test, the PLC controller 1 can send out pulse signals to control the opening and closing of the pneumatic reversing valve 6, thereby completing the test work of the injection valve.

Claims

1. A cold rolling partition cooling spray valve test device, characterized in that: It includes a PLC controller (1), a pneumatic reversing valve (2), a power control line (3), an air pipe (5), an air pipe connection block (6), a nozzle connection block (7), an injection valve (10) and a valve block (11). The injection valve (10) is installed in the valve block (11). The air pipe connection block (6) is installed at the front end of the valve block (11), and the nozzle connection block (7) is installed at the rear end of the valve block (11). The air pipe connection block (6) and the pneumatic reversing valve (2) are connected through the air pipe (5), and the PLC controller (1) and the pneumatic reversing valve (2) are connected through the control line (3).

2. The cold rolling zone cooling injection valve testing device according to claim 1, characterized in that: The valve block (11) is of a hollow structure, and an emulsion inlet joint (9) is installed at the upper end of the valve block (11), and the emulsion inlet joint (9) communicates with the hollow part.

3. The cold rolling zone cooling injection valve testing device according to claim 1, characterized in that: The valve block is provided with holes, and the structural dimensions of the holes match the structural dimensions of the injection valves installed on the emulsion spray beam. The injection valve (10) is installed in the valve block (11) through the holes.

4. The cold rolling partition cooling injection valve testing device according to claim 3, characterized in that: There are twelve such holes.

5. The cold rolling zone cooling injection valve testing device according to claim 1, wherein: It also includes an air pipe connection block installation threaded hole (12) and a valve block connection block threaded hole (13). The air pipe connection block installation threaded hole (12) is arranged at the front end of the valve block (11), and the valve block connection block threaded hole (13) is arranged at the rear end of the valve block (11). The air pipe connection block (6) is installed in the air pipe connection block installation threaded hole (12) using screws, and the nozzle connection block (7) is fixed in the valve block connection block threaded hole (13) using screws.

6. The cold rolling partition cooling injection valve testing device according to claim 1, characterized in that: The air pipe connection block (6) is provided with an exhaust muffler (4) and a gas source joint (8), and the exhaust muffler (4) and the gas source joint (8) are arranged at the bottom of the air pipe connection block (6).

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