CN202130022U - Oil-return device of cold isostatic press - Google Patents
Oil-return device of cold isostatic press Download PDFInfo
- Publication number
- CN202130022U CN202130022U CN201120161402U CN201120161402U CN202130022U CN 202130022 U CN202130022 U CN 202130022U CN 201120161402 U CN201120161402 U CN 201120161402U CN 201120161402 U CN201120161402 U CN 201120161402U CN 202130022 U CN202130022 U CN 202130022U
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- Prior art keywords
- oil
- oil return
- power supply
- contactor
- cold isostatic
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Abstract
The utility model provides an oil-return device of a cold isostatic press, which comprises an oil-return tank and an energy storage device with an energy storage device switch. The energy storage device is connected onto the oil-return tank, the oil-return tank is controlled to start or stop by the aid of a plunger pump, and the oil-return device is further connected with an electric contact pressure gauge for detecting oil pressure in the oil-return device. By the aid of the oil-return device, pressure build-up can be decreased, so that operational safety of equipment is improved, and damage to pipelines and valves is decreased.
Description
Technical field
The utility model belongs to the electroceramics manufacturing industry, relates to a kind of cold isostatic press oil return apparatus.
Background technology
The LDJ710/3000-145YS cold isostatic press is since 2008 come into operation, and oil return system has problems always.In the press oil return process, it is not enough that controlled pressure often appears in the oil return control pump, can't open oil return valve, and causes system builds the pressure for a long time.Influence the equipment operating efficiency and cause oil return valve frequently to reveal easily, increase equipment failure rate.
System pressure is provided by gear pump G5-6, this pump rated pressure 25Mpa.The press omnidistance unlatching of scavenge oil pump in the course of the work, but just load in pressure release and oil pumping process, all the other time hydraulic oil are through the direct oil sump tank of solenoid control.Oil return system control oil is opened way to cycle oil through the control piston in the control oil return valve during oil return valve work; Control piston area ratio is 0.08; The operating pressure of system is 110Mpa; The control-oil pressure that the system that can calculate requires when initial pressure release is 8.8Mpa, adds upper pipeline and valve clearance loss, at least at 9Mpa.This system opens in the press course of work always, and the most of the time is in Light Condition, and is very big to the wearing and tearing of gear pump.All will change the 3-4 platform in use every month, we disassemble the back to the pump that changes and find it basically is to wear and tear more seriously, and the system pressure during replacing is also mostly about 5Mpa.Because the control system can't reach the pressure requirement, causes system often to build the pressure, and has a strong impact on the equipment handling safety, each pipeline and valve member are also damaged by high pressure easily, especially oil return valve.The inefficacy of control system causes a series of equipment faults, finally influences plant produced rhythm, reduces production efficiency, increases maintenance cost.
The utility model content
In order to solve above technical problem, the utility model provides a kind of cold isostatic press oil return apparatus.
The technical scheme that the utility model adopted is: a kind of cold isostatic press oil return apparatus; Comprise oil sump tank, be connected the accumulator that has the accumulator switch on the oil sump tank; Said oil sump tank is controlled unlatching through plunger displacement pump or is stopped, and said oil return apparatus further is connected with the electro connecting pressure gauge that detects oil pressure in the oil return apparatus.
Said electro connecting pressure gauge comprises power supply common port and upper pressure limit node and low pressure limit node; Said power supply common port is connected the A end of power supply; Said low pressure limit node is connected with first contactor through normally-closed contact; The other end of this first contactor is connected the B end of power supply, is connected with contact switch between said normally-closed contact and the power supply common port, and said upper pressure limit node is connected on the power supply B point through second contactor.
Be provided with the 3rd contactor that has contact switch in the said plunger displacement pump.
Said accumulator switch is a Solenoid ball valve.
The utility model cold isostatic press oil return apparatus has the following advantages at least: the utility model oil return apparatus is through the oil pressure in the electro connecting pressure gauge test oil sump tank; When oil pressure was big, the accumulator switch opens was extracted into unnecessary oil in the accumulator; Thereby anti-locking system is felt suffocated; Minimizing equipment handling safety simultaneously, reduces the damage of pipeline and valve member.
Description of drawings
Fig. 1 is the overall structure sketch map of the utility model cold isostatic press oil return apparatus;
Fig. 2 is the wiring diagram of the utility model electro connecting pressure gauge.
The specific embodiment
See also shown in Figure 1; The utility model cold isostatic press oil return apparatus comprises oil sump tank, is connected the accumulator that has the accumulator switch 3 on the oil sump tank; Said oil sump tank is controlled unlatching through plunger displacement pump 5 or is stopped, and said oil return apparatus further is connected with the electro connecting pressure gauge 7 that detects oil pressure in the oil return apparatus.
See also the wiring diagram of electro connecting pressure gauge shown in Figure 2; Said electro connecting pressure gauge 7 comprises power supply common port 71 and upper pressure limit node 73 and low pressure limit node 75; Said power supply common port is connected the A end of power supply; Said low pressure limit node is connected with the first contactor J1 through normally-closed contact j2; The other end of this first contactor J1 is connected the B end of power supply, is connected with contact switch j1 between said normally-closed contact j2 and the power supply common port, and said upper pressure limit node is connected on the power supply B point through the second contactor J2.Be provided with the 3rd contactor J3 that has contact switch j1 in the said plunger displacement pump.
When the control system had just started, the first contactor J1 was charged, and contact switch j1 closes, the charged start-up control pump motor of the 3rd contactor J3, and plunger displacement pump is given the accumulator fuel feeding; When the pressure in the oil sump tank reached the upper pressure limit node, the charged normally-closed contact j2 of the second contactor J2 that makes of the second contactor J2 broke off, the first contactor J1 dead electricity, and contact switch j1 opens, the 3rd contactor J3 dead electricity, the control pump motor cuts out; During the press oil return; Oil in the accumulator is opened relief valve and other unidirectional cone valves through Solenoid ball valve; When the control system pressure drops to the low pressure limit node; The normally-closed contact of the second contactor J2 makes the first contactor J1 charged, and contact switch j1 closes, the charged start-up control pump motor of the 3rd contactor J3.Control pump is within the pressure limit of electro connecting pressure gauge setting fully.
The process evidence: after adopting the utility model oil return apparatus, equipment failure rate is obviously less.Press oil return system fault mainly shows as scavenge oil pump before transforming does not have problems such as pressure, oil return valve damage, control system magnetic valve is stuck; Average per tour all will have repeatedly repairs; Not only waste spare part but also influence the production order, frequent dismounting also causes the leakage of system's hydraulic oil.Scrap build moves to come over the past half year after accomplishing more, and the press pressure leak process operates steadily, and the repairing to oil return system is no more than 3 times weekly, changes 2 of Solenoid ball valves altogether, 2 of plunger displacement pumps.Compare greatly before press class produces and improve, fault rate obviously reduces.
The above is merely a kind of embodiment of the utility model; It or not whole or unique embodiment; The conversion of any equivalence that those of ordinary skills take the utility model technical scheme through reading the utility model specification, the claim that is the utility model contains.
Claims (4)
1. cold isostatic press oil return apparatus; It is characterized in that: comprise oil sump tank, be connected the accumulator that has the accumulator switch (3) on the oil sump tank; Said oil sump tank is controlled unlatching through plunger displacement pump (5) or is stopped, and said oil return apparatus further is connected with the electro connecting pressure gauge (7) that detects oil pressure in the oil return apparatus.
2. cold isostatic press oil return apparatus as claimed in claim 1; It is characterized in that: said electro connecting pressure gauge (7) comprises power supply common port (71) and upper pressure limit node (73) and low pressure limit node (75); Said power supply common port is connected the A end of power supply; Said low pressure limit node is connected with first contactor (J1) through normally-closed contact (j2); The other end of this first contactor (J1) is connected the B end of power supply, is connected with contact switch (j1) between said normally-closed contact (j2) and the power supply common port, and said upper pressure limit node is connected on the power supply B point through second contactor (J2).
3. cold isostatic press oil return apparatus as claimed in claim 2 is characterized in that: be provided with the 3rd contactor (J3) that has contact switch (j1) in the said plunger displacement pump.
4. cold isostatic press oil return apparatus as claimed in claim 1 is characterized in that: said accumulator switch is a Solenoid ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120161402U CN202130022U (en) | 2011-05-19 | 2011-05-19 | Oil-return device of cold isostatic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120161402U CN202130022U (en) | 2011-05-19 | 2011-05-19 | Oil-return device of cold isostatic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202130022U true CN202130022U (en) | 2012-02-01 |
Family
ID=45518804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120161402U Expired - Lifetime CN202130022U (en) | 2011-05-19 | 2011-05-19 | Oil-return device of cold isostatic press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202130022U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105346187A (en) * | 2015-11-16 | 2016-02-24 | 嘉兴市上村电子有限公司 | Copper-clad plate energy storage circulation hydraulic pressure forming device |
-
2011
- 2011-05-19 CN CN201120161402U patent/CN202130022U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105346187A (en) * | 2015-11-16 | 2016-02-24 | 嘉兴市上村电子有限公司 | Copper-clad plate energy storage circulation hydraulic pressure forming device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120201 |
|
| CX01 | Expiry of patent term |