Device for stably controlling plate shape of copper and copper alloy strip

Abstract

The utility model relates to the technical field of copper and copper alloy cold rolling processing, in particular to a device for stably controlling the plate shape of a copper and copper alloy strip, which comprises an oil injector and a cooling oil supply system, and the cooling oil supply system is used for injecting cooling oil into the oil injector; the oil sprayer comprises a shell and a valve element, and an inner hole is formed in the shell; a cooling oil spraying hole is formed in one end of the inner hole, a hydraulic oil inlet and outlet hole is formed in the other end of the inner hole, and a cooling oil inlet hole is formed in the side portion of the shell and close to the cooling oil spraying hole. The hydraulic oil supply system and the cooling oil supply system supply oil independently, so that the valve element in the oil sprayer slides smoothly, the oil sprayer can be opened smoothly to supply cooling oil to plates, the plate shape is effectively controlled, the product quality is improved, meanwhile, the independent oil supply design enables the electromagnetic reversing valve not to be damaged easily, and the service life of the electromagnetic reversing valve is prolonged. And the maintenance intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cold rolling processing of copper and copper alloys, in particular to a device for stably controlling the shape of copper and copper alloy strips. Background Art

[0002] Cold rolling mills generate a large amount of heat when cold rolling copper and copper alloy strips in multiple passes. This heat causes the working rolls of the rolling mill to produce uneven thermal expansion, forming thermal convexity of the working rolls and changing the roll gap distribution, which ultimately causes the outlet plate shape to have unevenly distributed plate defects. Cold rolling mill plate shape control systems usually have adjustment methods such as roll tilting, working roll bending, and intermediate roll shifting. However, these full roll gap adjustment methods are often difficult to eliminate local irregular asymmetric micro-waves. In order not to affect the surface quality of the strip, in modern plate shape control systems, segmented cooling of the rolls is one of the indispensable and effective means of controlling the plate shape. For example, CN103861875B discloses an optimization control method for the process cooling system of a cold rolling mill.

[0003] At present, the segmented cooling control mostly adopts the direct control injection valve system, and the electromagnetic reversing valve of the segmented cooling system is a two-position three-way electromagnetic reversing valve, which is installed on the injection beam in combination with the valve block.

[0004] Since the cleanliness of the rolling oil cannot meet the NAS standard, that is, the requirement of ≤3μm, the solenoid reversing valve core contains many impurities (oil stains, diatomaceous earth, etc.). These impurities can easily cause the solenoid reversing valve to be blocked and unable to reverse. Therefore, the existing oil circuit system can easily cause the injector valve core to be unable to open, seriously affecting the plate shape. At the same time, due to the large number of solenoid reversing valves, this method causes the solenoid reversing valve to be easily damaged frequently and the maintenance intensity is high. In order to solve the above technical problems, it is necessary to provide a device for stably controlling the plate shape of copper and copper alloy strips. Utility Model Content

[0005] In view of this, the utility model proposes a device for stably controlling the plate shape of copper and copper alloy strips. The device independently supplies oil by setting a hydraulic oil supply system and a cooling oil supply system, so that the valve core inside the injector slides smoothly, and then the injector can be opened smoothly to supply cooling oil to the plate, so as to effectively control the plate shape and improve product quality. At the same time, the independent oil supply design makes the electromagnetic reversing valve less likely to be damaged, reducing the maintenance intensity.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] The utility model provides a device for stably controlling the shape of copper and copper alloy strips, including an oil injector and a cooling oil supply system, wherein:

[0008] The cooling oil supply system is used to inject cooling oil into the injector;

[0009] It also includes a hydraulic oil supply system, wherein the injector includes a housing and a valve core, wherein,

[0010] An inner hole is provided inside the shell;

[0011] A cooling oil ejection hole is provided at one end of the inner hole, and a hydraulic oil inlet and outlet hole is provided at the other end. A cooling oil inlet hole is provided at a side of the shell near the cooling oil ejection hole. The hydraulic oil inlet and outlet hole are connected to the hydraulic oil supply system, and the cooling oil inlet hole is connected to the cooling oil supply system.

[0012] The hydraulic oil supply system is used to inject hydraulic oil into the hydraulic oil inlet and outlet holes to drive the valve core to move toward the cooling oil outlet hole to close the cooling oil outlet hole;

[0013] The cooling oil supply system is used to inject cooling oil into the cooling oil inlet hole to drive the valve core to move and reset toward the hydraulic oil inlet and outlet hole to open the cooling oil outlet hole.

[0014] On the basis of the above technical solution, preferably, the injector further includes a sealing ring, wherein:

[0015] The sealing ring is embedded in the hole wall of the inner hole;

[0016] The valve core passes through the sealing ring, and the sealing ring and the valve core are elastically pressed against each other.

[0017] On the basis of the above technical solution, preferably, the injector further includes a sealing sleeve, wherein,

[0018] The sealing sleeve is embedded in the inner side of the cooling oil ejection hole, and the end of the sealing sleeve away from the valve core is aligned with the outer end of the housing;

[0019] One end of the valve core away from the hydraulic oil inlet and outlet hole is in a frustum shape, and the frustum-shaped end of the valve core is selectively embedded in the sealing sleeve to form a sealing structure;

[0020] An oil pressure chamber is formed between one truncated cone-shaped end of the valve core and the inner hole, and the oil pressure chamber is communicated with the cooling oil inlet hole.

[0021] On the basis of the above technical solution, preferably, the injector further includes a buffer spring, wherein:

[0022] One end of the buffer spring is fixed to the valve core, and the other end is fixed to one end of the hydraulic oil inlet and outlet hole;

[0023] The elastic force of the buffer spring is less than the oil filling pressure of the cooling oil supply system.

[0024] On the basis of the above technical solution, preferably, the cooling oil supply system includes a clean oil tank and a first centrifugal pump, wherein,

[0025] The clean oil tank is communicated with the cooling oil inlet hole through the first centrifugal pump.

[0026] On the basis of the above technical solution, preferably, the cooling oil supply system further includes a dirty oil tank, a second centrifugal pump and a first filter, wherein,

[0027] The dirty oil tank is connected to the first filter via the second centrifugal pump;

[0028] The first filter is connected to the clean oil tank through a pipeline.

[0029] On the basis of the above technical solution, preferably, the hydraulic oil supply system includes a hydraulic oil tank, a multi-stage pump, an electromagnetic reversing valve and a second filter, wherein,

[0030] The hydraulic oil tank is connected to the second filter through the multi-stage pump, and the hydraulic oil tank is connected to the electromagnetic reversing valve through a pipeline;

[0031] The electromagnetic reversing valve is connected to the hydraulic oil inlet and outlet holes through a pipeline, and the electromagnetic reversing valve is connected to the second filter through a pipeline.

[0032] On the basis of the above technical solution, preferably, it further includes a spray beam, wherein,

[0033] A plurality of the fuel injectors are detachably arranged on the injection beam.

[0034] On the basis of the above technical solution, preferably, a cooling oil storage chamber is provided inside the injection beam, and a mounting hole is provided through the side of the injection beam at a position corresponding to the injector, wherein:

[0035] The fuel injector passes through the mounting hole and is fixedly connected by bolts, and the side portions at both ends of the fuel injector are sealed with the hole wall of the mounting hole;

[0036] The cooling oil storage chamber is communicated with the cooling oil inlet hole, and the cooling oil storage chamber is communicated with the first centrifugal pump.

[0037] On the basis of the above technical solution, preferably, it further includes a nozzle, wherein,

[0038] The two ends of the fuel injector extend outwardly from the mounting holes;

[0039] The nozzle is screwed onto the cooling oil ejection hole.

[0040] The device for stably controlling the shape of copper and copper alloy strips of the utility model has the following beneficial effects compared with the prior art:

[0041] (1) By setting up independent oil supply for the hydraulic oil supply system and the cooling oil supply system, the valve core inside the injector slides smoothly, and the injector can be opened smoothly to supply cooling oil to the plate, so as to effectively control the plate shape and improve product quality. At the same time, the independent oil supply design makes the electromagnetic reversing valve less prone to damage, reducing the maintenance intensity.

[0042] (2) By setting a buffer spring, the force of the buffer valve core when it is reset is easily reduced, making it less likely to be damaged. At the same time, by setting the elastic force of the buffer spring to be smaller than the oil injection pressure of the cooling oil supply system, the valve core can be smoothly pushed open by the cooling oil supply system, and then the cooling oil can be smoothly injected into the injector. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 This is a plan view of a device for stably controlling the shape of copper and copper alloy strips according to the present invention;

[0045] Figure 2 This is a front view of the fuel injector of the present utility model;

[0046] Figure 3 It is a cross-sectional view taken along the line AA of the present invention;

[0047] Figure 4 This is a schematic diagram of the internal structure of the fuel injector of the present utility model;

[0048] In the figure: 1. Injector; 2. Cooling oil supply system; 3. Hydraulic oil supply system; 4. Injection beam; 5. Nozzle; 11. Housing; 12. Valve core; 13. Sealing ring; 14. Sealing sleeve; 15. Buffer spring; 21. Clean oil tank; 22. First centrifugal pump; 23. Dirty oil tank; 24. Second centrifugal pump; 25. First filter; 31. Hydraulic oil tank; 32. Multi-stage pump; 33. Solenoid reversing valve; 34. Second filter; 101. Inner hole; 102. Cooling oil ejection hole; 103. Hydraulic oil inlet and outlet hole; 104. Cooling oil inlet hole; 105. Oil pressure chamber; 401. Cooling oil storage chamber; 402. Mounting hole. DETAILED DESCRIPTION

[0049] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] like Figure 1-4 As shown, the device for stably controlling the shape of copper and copper alloy strips of the present invention includes an injector 1, a cooling oil supply system 2 and a hydraulic oil supply system 3.

[0051] The cooling oil supply system 2 is used to inject cooling oil into the injector 1, and the injected cooling oil is sprayed toward the plate by the injector 1 to cool the plate.

[0052] The fuel injector 1 comprises a housing 11 and a valve core 12, wherein Figure 4 As shown, an inner hole 101 is provided inside the shell 11; a cooling oil outlet hole 102 is provided at one end of the inner hole 101, and a hydraulic oil inlet and outlet hole 103 is provided at the other end. A cooling oil inlet hole 104 is provided on the side of the shell 11 and near the cooling oil outlet hole 102. The cooling oil inlet hole 104 is connected to the cooling oil supply system 2, and the hydraulic oil inlet and outlet hole 103 is connected to the hydraulic oil supply system 3; when the cooling oil supply system 2 is filled with oil, the supplied cooling oil is injected into the cooling oil inlet hole 104 and then enters the cooling oil outlet hole 102 through the inner hole 101.

[0053] In the above structure, the hydraulic oil supply system 3 is used to inject hydraulic oil into the hydraulic oil inlet and outlet holes 103 to drive the valve core 12 to move toward the cooling oil outlet hole 102 to close the cooling oil outlet hole 102; the cooling oil supply system 2 is used to inject cooling oil into the cooling oil inlet hole 104 to drive the valve core 12 to move and reset toward the hydraulic oil inlet and outlet holes 103 to open the cooling oil outlet hole 102, wherein the supply pressure of the hydraulic oil supply system 3 is greater than the supply pressure of the cooling oil supply system 2.

[0054] In the initial state, if Figure 4 As shown, there is hydraulic oil in the hydraulic oil inlet and outlet holes 103. Under the action of oil pressure, the valve core 12 blocks the cooling oil ejection hole 102. When the plate needs to be cooled, the hydraulic oil supply system 3 withdraws the hydraulic oil, and the hydraulic oil inlet and outlet holes 103 loses pressure. The cooling oil supply system 2 supplies oil to the injector 1. Under the action of oil pressure, the valve core 12 moves toward the hydraulic oil inlet and outlet holes 103 and resets, opening the cooling oil ejection hole 102. At this time, the cooling oil can be ejected from the cooling oil ejection hole 102.

[0055] To prevent oil leakage, a sealing ring 13 is embedded in the wall of the inner hole 101, the valve core 12 passes through the sealing ring 13, and the sealing ring 13 and the valve core 12 are elastically pressed against each other. The sealing ring 13 allows the valve core 12 to slide in the inner hole 101, and there is no oil leakage between the inner hole 101 and the valve core 12, and the air tightness is good.

[0056] At the same time, a sealing sleeve 14 is embedded in the inner side of the cooling oil outlet hole 102, and the end of the sealing sleeve 14 away from the valve core 12 is aligned with the outer end of the housing 11; the end of the valve core 12 away from the hydraulic oil inlet and outlet hole 103 is truncated into a cone shape, and the truncated cone-shaped end of the valve core 12 is selectively embedded in the sealing sleeve 14 to form a sealing structure; an oil pressure chamber 105 is formed between the truncated cone-shaped end of the valve core 12 and the inner hole 101, and the oil pressure chamber 105 is connected to the cooling oil inlet hole 104; in this structure, the sealing effect is better after the truncated cone-shaped end of the valve core 12 is embedded in the sealing sleeve 14, and it is not easy to leak oil. When the cooling oil is injected, the cooling oil first reaches the oil pressure chamber 105, and then drives the valve core 12 to move toward the hydraulic oil inlet and outlet hole 103 and reset.

[0057] In order to buffer the force when the valve core 12 is reset, a buffer spring 15 is arranged between the valve core 12 and the hydraulic oil inlet and outlet hole 103, wherein one end of the buffer spring 15 is fixed on the valve core 12, and the other end is fixed on one end of the hydraulic oil inlet and outlet hole 103; the elastic force of the buffer spring 15 is set to be smaller than the oil injection pressure of the cooling oil supply system 2, and buffering is achieved by the buffer spring 15, so that the valve core 12 is not easily damaged.

[0058] In the above oil supply system, if Figure 1 As shown, the cooling oil supply system 2 includes a clean oil tank 21, a first centrifugal pump 22, a dirty oil tank 23, a second centrifugal pump 24 and a first filter 25, wherein the clean oil tank 21 is connected to the cooling oil inlet hole 104 through the first centrifugal pump 22; the dirty oil tank 23 is connected to the first filter 25 through the second centrifugal pump 24, and the first filter 25 is then connected to the clean oil tank 21 through a pipeline.

[0059] The dirty oil tank 23 is used to collect waste oil after cooling the plates. The waste oil is pumped to the first filter 25 for filtration by the second centrifugal pump 24, and the clean cooling oil is returned to the clean oil tank 21 for storage. When the plates need to be cooled, the first centrifugal pump 22 pumps the cooling oil in the clean oil tank 21 to the injector 1, which sprays it onto the plates. The waste oil after cooling the plates enters the dirty oil tank 23, forming a cycle.

[0060] like Figure 1As shown, the hydraulic oil supply system 3 includes a hydraulic oil tank 31, a multi-stage pump 32, an electromagnetic reversing valve 33 and a second filter 34, wherein the hydraulic oil tank 31 and the second filter 34 are connected through the multi-stage pump 32, and the hydraulic oil tank 31 is connected to the electromagnetic reversing valve 33 through a pipeline; the electromagnetic reversing valve 33 is connected to the hydraulic oil inlet and outlet hole 103 through a pipeline, and the electromagnetic reversing valve 33 is connected to the second filter 34 through a pipeline; the hydraulic oil in the hydraulic oil tank 31 is rolling oil with a cleanliness of ≤2-3μm; when cooling is not required, the multi-stage pump 32 pumps the hydraulic oil in the hydraulic oil tank 31 into the rolling oil; The hydraulic oil is pumped to the second filter 34 for filtration. The filtered hydraulic oil reaches the solenoid reversing valve 33. The solenoid reversing valve 33 performs reversing selection to inject the hydraulic oil into the hydraulic oil inlet and outlet hole 103 to drive the valve core 12 to move toward the cooling oil outlet hole 102 to close the cooling oil outlet hole 102. When cooling is required, the solenoid reversing valve 33 performs reversing selection to make the hydraulic oil injected into the hydraulic oil inlet and outlet hole 103 flow back to the hydraulic oil tank 31 through the pipeline. At this time, the valve core 12 loses the pressure of the hydraulic oil, and the cooling oil supply system 2 can supply oil smoothly.

[0061] In actual application, such as Figure 2 As shown, a plurality of spray beams 4 are detachably provided on the spray beam 4 to achieve multi-point spraying.

[0062] like Figure 3 As shown, a cooling oil storage chamber 401 is provided inside the injection beam 4, and a mounting hole 402 is provided through the side of the injection beam 4 at the position corresponding to the injector 1, wherein the injector 1 passes through the mounting hole 402 and is fixedly connected by bolts, and the sides of the injector 1 at both ends are sealed with the hole wall of the mounting hole 402; the cooling oil storage chamber 401 is connected to the cooling oil inlet hole 104, and the cooling oil storage chamber 401 is connected to the first centrifugal pump 22; the cooling oil storage chamber 401 is used to temporarily store cooling oil, and when the first centrifugal pump 22 is filling oil, the cooling oil in the cooling oil storage chamber 401 is pressed into the cooling oil inlet hole 104.

[0063] In order to improve the spraying effect, a nozzle 5 is provided on the cooling oil spraying hole 102 . Specifically, mounting holes 402 are extended outwardly from both ends of the injector 1 ; the nozzle 5 is screwed on the cooling oil spraying hole 102 .

[0064] The method for using the device for stably controlling the shape of copper and copper alloy strips of the utility model is as follows:

[0065] First, in the initial state, the hydraulic oil supply system 3 injects hydraulic oil into the hydraulic oil inlet and outlet hole 103. Under the action of oil pressure, the valve core 12 blocks the cooling oil outlet hole 102. When the plate needs to be cooled, the hydraulic oil supply system 3 withdraws the hydraulic oil from the hydraulic oil inlet and outlet hole 103, and the hydraulic oil inlet and outlet hole 103 loses pressure. The cooling oil supply system 2 supplies oil to the cooling oil inlet hole 104. Under the action of oil pressure, the valve core 12 moves toward the hydraulic oil inlet and outlet hole 103 and resets, opening the cooling oil outlet hole 102. At this time, the cooling oil can be sprayed out from the nozzle 5.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for stably controlling the shape of copper and copper alloy strips, comprising an injector (1) and a cooling oil supply system (2), wherein: The cooling oil supply system (2) is used to inject cooling oil into the injector (1); It is characterized in that it also includes a hydraulic oil supply system (3), wherein the injector (1) includes a housing (11) and a valve core (12), wherein, An inner hole (101) is provided inside the housing (11); A cooling oil ejection hole (102) is provided at one end of the inner hole (101), and a hydraulic oil inlet and outlet hole (103) is provided at the other end. A cooling oil inlet hole (104) is provided on the side of the outer shell (11) and close to the cooling oil ejection hole (102). The hydraulic oil inlet and outlet hole (103) is connected to the hydraulic oil supply system (3), and the cooling oil inlet hole (104) is connected to the cooling oil supply system (2). The hydraulic oil supply system (3) is used to inject hydraulic oil into the hydraulic oil inlet and outlet hole (103) to drive the valve core (12) to move toward the cooling oil outlet hole (102) to close the cooling oil outlet hole (102); The cooling oil supply system (2) is used to inject cooling oil into the cooling oil inlet hole (104) to drive the valve core (12) to move and reset in the direction of the hydraulic oil inlet and outlet hole (103) to open the cooling oil outlet hole (102).

2. The device for stably controlling the shape of copper and copper alloy strips according to claim 1, wherein: The fuel injector (1) further comprises a sealing ring (13), wherein: The sealing ring (13) is embedded in the hole wall of the inner hole (101); The valve core (12) passes through the sealing ring (13), and the sealing ring (13) and the valve core (12) are elastically pressed against each other.

3. The device for stably controlling the shape of copper and copper alloy strips according to claim 2, wherein: The injector (1) further comprises a sealing sleeve (14), wherein: The sealing sleeve (14) is embedded in the inner side of the cooling oil ejection hole (102), and the end of the sealing sleeve (14) away from the valve core (12) is aligned with the outer end of the housing (11); One end of the valve core (12) away from the hydraulic oil inlet and outlet hole (103) is in a truncated cone shape, and the truncated cone-shaped end of the valve core (12) is selectively embedded in the sealing sleeve (14) to form a sealing structure; An oil pressure chamber (105) is formed between one truncated cone-shaped end of the valve core (12) and the inner hole (101), and the oil pressure chamber (105) is connected to the cooling oil inlet hole (104).

4. The device for stably controlling the shape of copper and copper alloy strips according to claim 3, wherein: The fuel injector (1) further comprises a buffer spring (15), wherein: One end of the buffer spring (15) is fixed on the valve core (12), and the other end is fixed on one end of the hydraulic oil inlet and outlet hole (103); The elastic force of the buffer spring (15) is smaller than the oil injection pressure of the cooling oil supply system (2).

5. The device for stably controlling the shape of copper and copper alloy strips according to claim 1, wherein: The cooling oil supply system (2) comprises a clean oil tank (21) and a first centrifugal pump (22), wherein: The clean oil tank (21) is connected to the cooling oil inlet hole (104) via the first centrifugal pump (22).

6. The device for stably controlling the shape of copper and copper alloy strips according to claim 5, characterized in that: The cooling oil supply system (2) further includes a dirty oil tank (23), a second centrifugal pump (24) and a first filter (25), wherein: The dirty oil tank (23) is connected to the first filter (25) via the second centrifugal pump (24); The first filter (25) is connected to the clean oil tank (21) through a pipeline.

7. The device for stably controlling the shape of copper and copper alloy strips according to claim 5, characterized in that: The hydraulic oil supply system (3) comprises a hydraulic oil tank (31), a multi-stage pump (32), an electromagnetic reversing valve (33) and a second filter (34), wherein: The hydraulic oil tank (31) is connected to the second filter (34) via the multi-stage pump (32), and the hydraulic oil tank (31) is connected to the electromagnetic reversing valve (33) via a pipeline; The electromagnetic reversing valve (33) is connected to the hydraulic oil inlet and outlet hole (103) through a pipeline, and the electromagnetic reversing valve (33) is connected to the second filter (34) through a pipeline.

8. The device for stably controlling the shape of copper and copper alloy strips according to claim 7, characterized in that: Also included is a spray beam (4), wherein: A plurality of the fuel injectors (1) are detachably arranged on the injection beam (4).

9. The device for stably controlling the shape of copper and copper alloy strips according to claim 8, characterized in that: A cooling oil storage chamber (401) is provided inside the injection beam (4), and a mounting hole (402) is provided through the side of the injection beam (4) at a position corresponding to the injector (1), wherein: The fuel injector (1) passes through the mounting hole (402) and is fixedly connected by bolts, and the side portions at both ends of the fuel injector (1) are sealedly connected to the hole wall of the mounting hole (402); The cooling oil storage chamber (401) is in communication with the cooling oil inlet hole (104), and the cooling oil storage chamber (401) is in communication with the first centrifugal pump (22).

10. The device for stably controlling the shape of copper and copper alloy strips according to claim 9, characterized in that: Also included is a nozzle (5), wherein The two ends of the fuel injector (1) extend outwardly to form the mounting holes (402); The nozzle (5) is screwed onto the cooling oil ejection hole (102).

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