CN220539993U - Hydraulic lifting control system for lower end cover of isostatic pressing machine - Google Patents
Hydraulic lifting control system for lower end cover of isostatic pressing machine Download PDFInfo
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- CN220539993U CN220539993U CN202321490728.8U CN202321490728U CN220539993U CN 220539993 U CN220539993 U CN 220539993U CN 202321490728 U CN202321490728 U CN 202321490728U CN 220539993 U CN220539993 U CN 220539993U
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- lifting
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- lifting cylinder
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- 238000000462 isostatic pressing Methods 0.000 title description 9
- 230000001360 synchronised effect Effects 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 63
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a hydraulic lifting control system for a lower end cover of an isostatic press, which comprises two parallel cylinders, namely a lifting cylinder I (11) and a lifting cylinder II (12), wherein one end of a piston rod of the lifting cylinder I (11) and one end of a piston rod of the lifting cylinder II (12) are respectively connected with the lower end cover, a rod cavity of the lifting cylinder I (11) and a rod cavity of the lifting cylinder II (12) are communicated with a shunt end of a synchronous valve (4), a current collecting end of the synchronous valve (4) is connected with an A port of an electromagnetic reversing valve (6) through a one-way speed regulating valve (5), an oil inlet and outlet passage of an oil cylinder rodless cavity of the lifting cylinder I (11) and an oil inlet and outlet passage of an oil cylinder rodless cavity of the lifting cylinder II (12) are connected with a B port of the electromagnetic reversing valve (6) through the one-way speed regulating valve (5), a P port of the electromagnetic reversing valve (6) is connected with an oil pump, and a T port of the electromagnetic reversing valve (6) is connected with the oil tank. Because the oil inlet branch and the oil return branch of the two oil cylinders are connected in parallel, the system synchronization precision is high.
Description
Technical Field
The utility model relates to a hydraulic lifting control system for a lower end cover of an isostatic pressing machine, in particular to a hydraulic lifting control system for the lower end cover of the isostatic pressing machine, which can effectively realize synchronous lifting of double oil cylinders.
Background
The isostatic press is a forming device working under the ultra-high pressure state, and the isostatic press uses oil, water or gas as a working medium, and applies the same ultra-high pressure in all directions to all surfaces of an object, so that the formed workpiece has the characteristics of high and uniform density, uniform sintering shrinkage, convenience in machining and the like. Because the working cylinder of the isostatic pressing machine and the lower end cover adopt a floating structure, no connection exists, the machine frame is required to bear the axial load transmitted by the upper end cover and the lower end cover of the working cylinder, a gap is formed between the upper end cover and the lower end cover and the bearing plate of the machine frame when the machine frame moves, the lower end cover is required to be lifted before the machine frame moves due to the dead weight of the lower end cover, a certain gap is formed between the machine frame and the lower end cover, and the lifting work of the lower end cover cannot be met by the conventional crane in a general workshop when the sealing element is replaced, the lifting of the lower end cover is required to be realized due to the assistance of the oil cylinders, and the two oil cylinders are arranged at the left end and the right end of the lower end cover respectively.
Disclosure of Invention
The utility model aims to solve the problem of lifting of a lower end cover of a large-sized isostatic pressing machine, and provides a hydraulic lifting control system for the lower end cover of the isostatic pressing machine, which can effectively realize synchronous lifting of double oil cylinders.
The utility model is realized by the following technical scheme: the utility model provides an isostatic press lower extreme cover hydraulic pressure lift control system which characterized in that: the hydraulic lifting device comprises a lifting cylinder I and a lifting cylinder II which are arranged in parallel, wherein one ends of piston rods of the lifting cylinder I and the lifting cylinder II are respectively connected with a lower end cover, a rod cavity of the lifting cylinder I and a rod cavity of the lifting cylinder II are communicated with a shunt end of a synchronous valve, a current collecting end of the synchronous valve is connected with an A port of an electromagnetic reversing valve through a one-way speed regulating valve, an oil inlet and outlet oil way of the rodless cavity of the lifting cylinder I and an oil outlet oil way of the oil inlet and outlet oil way of the rodless cavity of the lifting cylinder II are connected in parallel and then are connected with a B port of the electromagnetic reversing valve through a one-way speed regulating valve, a P port of the electromagnetic reversing valve is connected with an oil pump, and a T port of the electromagnetic reversing valve is connected with the oil tank.
Further, the oil cylinder rod cavity of the lifting oil cylinder I is communicated with the shunt end of the synchronous valve through the hydraulic control one-way valve I; and the oil cylinder rod cavity of the lifting oil cylinder II is communicated with the shunt end of the synchronous valve through the hydraulic control one-way valve II.
Further, the oil cylinder rod cavity of the first lifting oil cylinder is connected with the inlet end of the overflow valve I, the outlet end of the overflow valve I is communicated with the oil tank, the oil cylinder rod cavity of the second lifting oil cylinder is connected with the inlet end of the overflow valve II, and the outlet end of the overflow valve II is communicated with the oil tank.
Compared with the prior art, the utility model has the following advantages: according to the hydraulic lifting control system for the lower end cover of the isostatic pressing machine, in the lifting and descending processes, the first lifting oil cylinder, the oil inlet branch and the oil return branch of the two lifting oil cylinders are connected in parallel; the one-way speed regulating valve controls and regulates the flow entering or exiting the two oil cylinders by changing the flow area of the one-way speed regulating valve, so as to control the lifting speed of the lower end cover; the synchronous valve controls the synchronous lifting of the two oil cylinders, so that the phenomenon that the lower end cover is inclined or blocked in the lifting process is avoided; when the electromagnetic directional valve works at the left position, the oil cylinder does not have a rod cavity for oil feeding, the oil cylinder descends synchronously, and when the electromagnetic directional valve works at the right position, the oil cylinder has a rod cavity for oil feeding, and the oil cylinder ascends synchronously. When the electromagnetic reversing valve is in the middle position, the oil return path is relieved, the oil way is locked through the two hydraulic control one-way valves, a two-way hydraulic lock is formed, the phenomenon that the lower end cover slides downwards due to the leakage of hydraulic oil in the lifting oil cylinder I and the lifting oil cylinder II when the lower end cover is at the highest position is prevented, the safe, quick and accurate synchronous lifting of the lower end cover is realized, the system is simple and economical, the correction capability is high, and the synchronous precision is high.
Drawings
Fig. 1 is a schematic diagram of the working principle of a hydraulic lifting control system and a hydraulic lifting control method for a lower end cover of an isostatic pressing machine.
In the figure: 11. the hydraulic control system comprises a first lifting oil cylinder, a second lifting oil cylinder, a 21 overflow valve, a 22 overflow valve, a 31 hydraulic control one-way valve, a 32 hydraulic control one-way valve, a 4 synchronous valve, a 5 one-way speed regulating valve and a 6 electromagnetic reversing valve.
Detailed Description
The present utility model will be described in further detail with reference to examples, but embodiments of the present utility model are not limited thereto.
Fig. 1 shows a hydraulic lifting control system for a lower end cover of an isostatic press, which is characterized in that: the hydraulic oil pump comprises two parallel cylinders, namely a first lifting cylinder 11 and a second lifting cylinder 12, wherein one end of a piston rod of the first lifting cylinder 11 and one end of a piston rod of the second lifting cylinder 12 are respectively connected with a lower end cover, a rod cavity of the first lifting cylinder 11 and a rod cavity of the second lifting cylinder 12 are communicated with a shunt end of a synchronous valve 4, a current collecting end of the synchronous valve 4 is connected with an A port of an electromagnetic reversing valve 6 through a one-way speed regulating valve 5, an oil cylinder rodless cavity of the first lifting cylinder 11 and an oil inlet and outlet oil way of the oil cylinder rodless cavity of the second lifting cylinder 12 are connected in parallel and then connected with a B port of the electromagnetic reversing valve 6 through the one-way speed regulating valve 5, a P port of the electromagnetic reversing valve 6 is connected with an oil pump, and a T port of the electromagnetic reversing valve 6 is connected with the oil tank.
The cylinder rod cavity of the lifting cylinder I11 is communicated with the shunt end of the synchronous valve 4 through a hydraulic control one-way valve I31; the cylinder rod cavity of the lifting cylinder II 12 is communicated with the shunt end of the synchronous valve 4 through a hydraulic control check valve II 32. When the left position of the electromagnetic reversing valve 6 is electrified and communicated, the port P is communicated with the port B, the port T is communicated with the port A, pressure oil at the port P flows into the one-way speed regulating valve 5 through the port B, the pressure oil flows into the cylinder rodless cavity of the lifting cylinder I11 and the cylinder rodless cavity of the lifting cylinder II 12 again, the cylinder piston rod stably stretches out, the hydraulic control one-way valve I31 is opened, oil return is synchronous in speed through the synchronous valve 4, and the movement speed of the cylinder piston can be controlled and regulated through the one-way speed regulating valve 5, so that the lower end cover stably descends; when the right position of the electromagnetic reversing valve 6 is electrified and communicated, the port P is communicated with the port A, the port T is communicated with the port B, pressure oil at the port P flows out through the port A and enters the one-way speed regulating valve 5 and the synchronous valve 4 to flow into rod cavities of the two cylinders of the first lifting cylinder 11 and the second lifting cylinder 12, the cylinder piston rod is stably retracted, the pressure oil is shunted by the synchronous valve 4 to realize the speed synchronization of the two cylinders of the first lifting cylinder 11 and the second lifting cylinder 12, and the movement speed of the cylinder piston can be controlled and regulated by the speed regulating valve 5, so that the lower end cover is stably lifted. When the electromagnetic reversing valve 6 is in the middle position, the pressure of the oil return path is relieved, the oil path is locked through the first hydraulic control check valve 31 and the second hydraulic control check valve 32, a bidirectional hydraulic lock is formed, and the phenomenon that the lower end cover slides downwards due to leakage of hydraulic oil in the first lifting oil cylinder 11 and the second lifting oil cylinder 12 when the lower end cover is in the highest position is prevented.
The oil cylinder rod cavity of the first lifting oil cylinder 11 is connected with the inlet end of the first overflow valve 21, the outlet end of the first overflow valve 21 is communicated with an oil tank, the oil cylinder rod cavity of the second lifting oil cylinder 12 is connected with the inlet end of the second overflow valve 22, and the outlet end of the second overflow valve 22 is communicated with the oil tank. The first overflow valve 21 and the second overflow valve 22 play a role in safety protection, and ensure the safety of an oil way.
The first lifting cylinder 11 and the second lifting cylinder 12 are provided with displacement sensors for detecting displacement errors of the cylinders.
Claims (4)
1. The utility model provides an isostatic press lower extreme cover hydraulic pressure lift control system which characterized in that: the hydraulic lifting device comprises a lifting cylinder I (11) and a lifting cylinder II (12) which are arranged in parallel, wherein one end of a piston rod of the lifting cylinder I (11) and one end of a piston rod of the lifting cylinder II (12) are respectively connected with a lower end cover, a rod cavity of the lifting cylinder I (11) and a flow dividing end of a synchronous valve (4) are communicated with each other, a flow collecting end of the synchronous valve (4) is connected with an A port of an electromagnetic reversing valve (6) through a one-way speed regulating valve (5), an oil cylinder rodless cavity of the lifting cylinder I (11) and an oil inlet and outlet oil way of the oil cylinder rodless cavity of the lifting cylinder II (12) are connected with a B port of the electromagnetic reversing valve (6) in parallel, a P port of the electromagnetic reversing valve (6) is connected with an oil pump, and a T port of the electromagnetic reversing valve (6) is connected with the oil tank.
2. The hydraulic lifting control system for a lower end cover of an isostatic press according to claim 1, wherein: the oil cylinder rod cavity of the lifting oil cylinder I (11) is communicated with the shunt end of the synchronous valve (4) through a hydraulic control one-way valve I (31); the oil cylinder rod cavity of the lifting oil cylinder II (12) is communicated with the shunt end of the synchronous valve (4) through the hydraulic control one-way valve II (32).
3. The hydraulic lifting control system for the lower end cover of the isostatic press according to claim 2, wherein: the oil cylinder with the rod cavity of the first lifting oil cylinder (11) is connected with the inlet end of the first overflow valve (21), the outlet end of the first overflow valve (21) is communicated with an oil tank, the oil cylinder with the rod cavity of the second lifting oil cylinder (12) is connected with the inlet end of the second overflow valve (22), and the outlet end of the second overflow valve (22) is communicated with the oil tank.
4. A hydraulic lifting control system for a lower end cap of an isostatic press as claimed in claim 3, wherein: the lifting cylinder I (11) and the lifting cylinder II (12) are provided with displacement sensors for detecting displacement errors of the cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321490728.8U CN220539993U (en) | 2023-06-12 | 2023-06-12 | Hydraulic lifting control system for lower end cover of isostatic pressing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321490728.8U CN220539993U (en) | 2023-06-12 | 2023-06-12 | Hydraulic lifting control system for lower end cover of isostatic pressing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220539993U true CN220539993U (en) | 2024-02-27 |
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ID=89969728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321490728.8U Active CN220539993U (en) | 2023-06-12 | 2023-06-12 | Hydraulic lifting control system for lower end cover of isostatic pressing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220539993U (en) |
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2023
- 2023-06-12 CN CN202321490728.8U patent/CN220539993U/en active Active
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