CN214788288U - Hydraulic control valve group of high-pressure water descaling valve - Google Patents
Hydraulic control valve group of high-pressure water descaling valve Download PDFInfo
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- CN214788288U CN214788288U CN202120598550.3U CN202120598550U CN214788288U CN 214788288 U CN214788288 U CN 214788288U CN 202120598550 U CN202120598550 U CN 202120598550U CN 214788288 U CN214788288 U CN 214788288U
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Abstract
The utility model discloses a water under high pressure descaling valve hydraulic control valve group, it includes two the control unit, respectively with control rolling mill secondary descaling device's last descaling valve pneumatic cylinder with lower descaling valve pneumatic cylinder corresponding, every the control unit includes stack formula relief pressure valve and electromagnetic directional valve, electromagnetic directional valve's P mouth supplies oil pipe to be connected through stack formula relief pressure valve and pump station, T mouth and oil return pipe connection, and A mouth and last descaling valve pneumatic cylinder or the rodless chamber of descaling valve pneumatic cylinder down are connected, and B mouth and last descaling valve pneumatic cylinder or the pole chamber that has of descaling valve pneumatic cylinder down are connected. The utility model discloses can adjust the opening pressure of descaling valve control pneumatic cylinder to the settlement within range, can effectively prevent that the descaling valve action from appearing hysteresis because of the oil pressure is undulant, can avoid the pneumatic cylinder to take place the oil leak trouble again to improve descaling device's operational reliability, reduced equipment failure rate, guaranteed going on smoothly of rolling mill production.
Description
Technical Field
The utility model relates to a hydraulic control valves for slab band rolling mill water under high pressure descaling valve can realize the adjustment at any time of descaling valve control pneumatic cylinder opening pressure, belongs to hydraulic technical field.
Background
The high-pressure water descaling device is key production equipment of a wide and thick plate rolling mill and is divided into a primary descaling device and a secondary descaling device of the rolling mill. The primary descaling device is provided with two groups of descaling valves, namely an east group and a west group, the steel billet is heated in the heating furnace, the surface of the steel billet generates thicker scale, and the scale of the steel billet is removed by the primary descaling device; the secondary descaling device of the rolling mill is divided into a front descaling device and a rear descaling device, wherein the front descaling device and the rear descaling device are respectively and independently controlled by two groups of descaling valves, one group of descaling valves controls upward spraying, the other group of descaling valves controls downward spraying, and the secondary descaling device of the rolling mill mainly removes iron scales generated in the process of waiting for temperature of steel plate rolling.
Each descaling valve control hydraulic cylinder is controlled by an independent hydraulic valve group, and the hydraulic cylinders mainly control the opening and closing of the descaling valves. The existing descaling valve control hydraulic cylinder has a separate hydraulic system, and the system pressure is 9 PMa. Due to the limitation of the structure or the installation space, the pump stations of some hydraulic systems are far away from the descaling valve group, the arrangement of pipelines is long, the pressure fluctuation at the tail end of the pipelines is large, the action of the descaling valve is often delayed, and the reliability of the descaling device is seriously influenced. In order to solve the problems, hydraulic systems with pump stations far away from the descaling valve group adopt rolling mill auxiliary hydraulic oil supply to increase the system pressure to 16MPa, but after the system pressure is increased, the descaling valve control hydraulic cylinder often has oil leakage faults, the reliability of the descaling device can be reduced, the fault treatment is time-consuming and labor-consuming, and the smooth production of the rolling mill is influenced. Therefore, how to effectively improve the reliability of the descaling device becomes a problem for technicians.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a water under high pressure descaling valve hydraulic control valve group to the drawback of prior art to improve descaling device's reliability, guarantee going on smoothly of rolling mill production.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a high pressure water descaling valve hydraulic control valve group, includes two the control unit, respectively with control rolling mill secondary descaling device's last descaling valve pneumatic cylinder with lower descaling valve pneumatic cylinder corresponding, every the control unit includes stack formula relief pressure valve and electromagnetic directional valve, electromagnetic directional valve's P mouth is through stack formula relief pressure valve and pump station oil supply line connection, T mouth and oil return line connection, and A mouth and last descaling valve pneumatic cylinder or the rodless chamber of descaling valve pneumatic cylinder down are connected, and B mouth and last descaling valve pneumatic cylinder or the pole chamber that has of descaling valve pneumatic cylinder down are connected.
In the hydraulic control valve group of the high-pressure water descaling valve, the port B of the electromagnetic directional valve is provided with the pressure relay.
In the hydraulic control valve group of the high-pressure water descaling valve, the electromagnetic directional valve and the superposed pressure reducing valve are fixed on the valve block through bolts.
In the hydraulic control valve group of the high-pressure water descaling valve, the pressure at the output end of the superposition type reducing valve is controlled to be 8-9 bar.
The utility model discloses a two relatively independent control oil circuit control rolling mill secondary descaling device upper and lower descaling valve pneumatic cylinder respectively to reduce the opening pressure of descaling valve control pneumatic cylinder through stack formula relief pressure valve, avoid the system pressure to improve and cause adverse effect to the pneumatic cylinder.
The utility model discloses can adjust the opening pressure of descaling valve control pneumatic cylinder to the settlement within range, can effectively prevent that the descaling valve action from appearing hysteresis because of the oil pressure is undulant, can avoid the pneumatic cylinder to take place the oil leak trouble again to improve descaling device's operational reliability, reduced equipment failure rate, guaranteed going on smoothly of rolling mill production.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a hydraulic control schematic diagram of the present invention;
fig. 2 is the utility model discloses an injection valve hydrovalve piece assembly drawing.
The reference numbers in the figures are: 1. the device comprises a ball valve, 2, a superposition type pressure reducing valve, 3, an electromagnetic directional valve, 4, a pressure relay, 5, an upper descaling valve hydraulic cylinder, 6, a lower descaling valve hydraulic cylinder, 7 and a valve block.
Detailed Description
The utility model provides a water under high pressure descaling valve hydraulic control valve group has realized that descaling valve pneumatic cylinder opening pressure is adjustable, can open the pressure with descaling valve pneumatic cylinder and adjust to the settlement within range, reduces the equipment fault rate, guarantees going on smoothly of production.
The utility model provides a water under high pressure descaling valve hydraulic control valve group, it adopts two relatively independent the control unit, controls rolling mill secondary descaling device's upper and lower descaling valve pneumatic cylinder respectively, through solenoid directional valve P mouth stack relief pressure valve to reduce descaling valve control pneumatic cylinder opening pressure, avoid the emergence of pneumatic cylinder oil leak accident, thereby improved descaling device's reliability, reduced the equipment failure rate, guaranteed going on smoothly of production.
Referring to fig. 1 and 2, the present invention includes two relatively independent control units, which respectively control the upper and lower hydraulic cylinders 5 and 6 of the secondary descaling device of the rolling mill, and each control unit includes a ball valve 1, a stacked pressure reducing valve 2, an electromagnetic directional valve 3 and a pressure relay 4.
The P port of the electromagnetic directional valve 3 is connected with an oil supply pipeline of the pump station through a superposition type pressure reducing valve 2, and a ball valve 1 is arranged on the P port of the oil supply pipeline; a T port of the electromagnetic directional valve 3 is connected with an oil return pipeline; the port A of the electromagnetic directional valve 3 is connected with a rodless cavity of the upper descaling valve hydraulic cylinder 5 or the lower descaling valve hydraulic cylinder 6, the port B is connected with a rod cavity of the upper descaling valve hydraulic cylinder 5 or the lower descaling valve hydraulic cylinder 6, and the port B of the electromagnetic directional valve 3 is provided with a pressure relay 4; the electromagnetic directional valve 3 and the superposition type pressure reducing valve 2 are fixedly connected to the valve block 7 through bolts.
The opening pressure of the upper descaling valve hydraulic cylinder 5 or the lower descaling valve hydraulic cylinder 6 is controlled to be 8-9bar by the overlapped reducing valve 2, and the pressure relay 4 is used for detecting the rod cavity pressure of the upper descaling valve hydraulic cylinder 5 or the lower descaling valve hydraulic cylinder 6.
The utility model discloses a working process:
the hydraulic cylinder action process of the upper descaling valve:
a control coil of the electromagnetic directional valve 3 is electrified, a port P of the electromagnetic directional valve 3 is communicated with a port B, a port A is communicated with a port T, pressure oil passes through the ball valve 1 and the superposition type pressure reducing valve 2 to reach a rod cavity of an upper descaling valve hydraulic cylinder 5, the descaling valve is opened, a pressure relay 4 is used for detecting the opening pressure of the descaling valve, and rodless cavity oil of the upper descaling valve hydraulic cylinder 5 passes through the port A to the port T of the electromagnetic directional valve 3 and returns to an oil tank; the control coil of the electromagnetic directional valve 3 is powered off, the port P of the electromagnetic directional valve 3 is communicated with the port A, the port B is communicated with the port T, pressure oil passes through the ball valve 1 and the superposition type pressure reducing valve 2 to reach a rodless cavity of an upper descaling valve hydraulic cylinder 5, the descaling valve is closed, and rod cavity oil of the upper descaling valve hydraulic cylinder 5 passes through the port B of the electromagnetic directional valve 3 to reach a port T oil return tank; and a complete hydraulic action process of the upper descaling valve is realized.
The action process of the hydraulic cylinder of the lower descaling valve is the same as that of the hydraulic cylinder of the upper descaling valve.
The overlapped type pressure reducing valve 2 is used for controlling the opening pressure of the upper descaling valve hydraulic cylinder 5 or the lower descaling valve hydraulic cylinder 6, and the opening pressure of the hydraulic cylinders is adjustable.
The pressure relay 4 is used for detecting the pressure of a rod cavity of the upper descaling valve hydraulic cylinder 5 or the lower descaling valve hydraulic cylinder 6, the output signal of the pressure relay is connected to the alarm device, and when the pressure of the rod cavity is lower than a set lowest value or higher than a set highest value, the alarm device sends out an audible and visual alarm signal to prompt maintenance personnel to search and remove faults in time and ensure the normal operation of the descaling device.
The utility model discloses utilize two sets of independent hydraulic control return circuits, descaling valve pneumatic cylinder and lower descaling valve pneumatic cylinder independent control on realizing, two descaling valve pneumatic cylinders can realize the independent action. The opening pressures of the upper descaling valve hydraulic cylinder 5 and the lower descaling valve hydraulic cylinder 6 are controlled by setting the pressure of the stacked reducing valve, and the pressure relay is used for detecting the opening pressure of the descaling valve hydraulic cylinder to ensure that the descaling valve hydraulic cylinder acts normally. The utility model discloses a to descaling valve pneumatic cylinder hydraulic system's improvement, effectively solved the oil leak problem of descaling valve pneumatic cylinder, prolonged pneumatic cylinder life, reduced equipment trouble rate and maintainer working strength, guaranteed the smooth operation of production and equipment.
The valve bank has the advantages of simple structure, convenience in operation and low fault rate, realizes automatic control, can improve the operational reliability of the secondary descaling device of the rolling mill, and ensures the stable operation of equipment.
Claims (4)
1. The utility model provides a high pressure water descaling valve hydraulic control valve group, characterized by includes two the control unit, respectively with control rolling mill secondary descaling device's last descaling valve pneumatic cylinder (5) and lower descaling valve pneumatic cylinder (6) corresponding, every the control unit includes stack formula relief pressure valve (2) and solenoid directional valve (3), the P mouth of solenoid directional valve (3) is connected with pump station fuel feeding line through stack formula relief pressure valve (2), and the T mouth is connected with oil return line, and A mouth and last descaling valve pneumatic cylinder (5) or the no pole chamber of descaling valve pneumatic cylinder (6) are connected down, and B mouth and last descaling valve pneumatic cylinder (5) or the pole chamber of descaling valve pneumatic cylinder (6) are connected down.
2. The hydraulic control valve group of the high-pressure water descaling valve according to the claim 1, characterized in that a pressure relay (4) is arranged on the port B of the electromagnetic directional valve (3).
3. The hydraulic control valve group of the high-pressure water descaling valve according to claim 1 or 2, wherein the electromagnetic directional valve (3) and the superposition type pressure reducing valve (2) are fixed on the valve block (7) through bolts.
4. A hydraulic control valve group of a high-pressure water descaling valve according to claim 3, characterized in that the pressure at the output of the stack pressure reducing valve (2) is controlled at 8-9 bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120598550.3U CN214788288U (en) | 2021-03-24 | 2021-03-24 | Hydraulic control valve group of high-pressure water descaling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120598550.3U CN214788288U (en) | 2021-03-24 | 2021-03-24 | Hydraulic control valve group of high-pressure water descaling valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214788288U true CN214788288U (en) | 2021-11-19 |
Family
ID=78666736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120598550.3U Active CN214788288U (en) | 2021-03-24 | 2021-03-24 | Hydraulic control valve group of high-pressure water descaling valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214788288U (en) |
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2021
- 2021-03-24 CN CN202120598550.3U patent/CN214788288U/en active Active
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