CN202378258U - Hydraulic loop system of injection molding machine with power-off protection - Google Patents
Hydraulic loop system of injection molding machine with power-off protection Download PDFInfo
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- CN202378258U CN202378258U CN2011204815342U CN201120481534U CN202378258U CN 202378258 U CN202378258 U CN 202378258U CN 2011204815342 U CN2011204815342 U CN 2011204815342U CN 201120481534 U CN201120481534 U CN 201120481534U CN 202378258 U CN202378258 U CN 202378258U
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Abstract
The utility model relates to a hydraulic loop system of an injection molding machine with power-off protection, comprising a high-pressure opening/closing mould valve, a pillow pressure valve, a pressure relief valve, a power-off protection valve, a pressure sensor and a high-pressure oil cylinder, wherein a pressure oil inlet of the high-pressure opening/closing mould valve and an oil pump discharge opening are connected, an oil back opening is connected with an oil tank, a first oil discharge end is connected with an oil control opening of a pressure relief valve, and a second oil discharge end is connected with an oil inlet of the pillow pressure valve; an oil discharge end of the pillow pressure valve is connected with a rod cavity of the high-pressure oil cylinder; an oil discharge end of the pressure relief valve is connected with the rod cavity of the high-pressure oil cylinder, and an oil charge end of the pressure relief valve is connected with the oil tank; and an oil charge end of the power-off protection valve is connected with the rod cavity of the high-pressure oil cylinder, and an oil discharge end of the power-off protection valve is directly connected with the oil tank. The hydraulic loop system disclosed by the utility model ensures that an error action of a machine is prevented in a power-off state because an oil cylinder still has high-pressure oil and element pressure of each hydraulic pipe is zero after power failure when hydraulic elements are dismantled and maintained so as to protect the safety of the machine and a labor.
Description
Technical field
The utility model relates to a kind of protection system of injection machine, particularly relates to the hydraulic circuit system that a kind of injection machine has power-off protection.
Background technology
Direct press type or double-plate injection moulding machine carry out high-voltage lock mould with oil cylinder, and as when the high-voltage lock mould, the machine accident power-off is shut down, but oil cylinder still is in high pressure conditions sometimes, if potential safety hazard appears in untimely pressure release easily.
Summary of the invention
The purpose of the utility model just provides the hydraulic circuit system that a kind of injection machine has power-off protection, and accident power-off is shut down can make the oil cylinder pressure release rapidly, can avoid the generation of accident.
For achieving the above object, the utility model adopts following technical scheme:
A kind of injection machine has the hydraulic circuit system of power-off protection; Comprise high pressure folding mould valve, pillow pressure valve, pressure-relief valve, power-off protection valve, pressure sensor, high-voltage oil cylinder; Described high pressure folding mould valve pressure hydraulic fluid port links to each other with the oil pump oil-out; Oil return opening links to each other with fuel tank, and first oil outlet end links to each other with the control port of pressure-relief valve, and second oil outlet end presses the oil-in of valve to link to each other with pillow; Pillow presses the oil outlet end of valve to link to each other with the rod chamber of high-voltage oil cylinder; The oil outlet end of pressure-relief valve links to each other with the high-voltage oil cylinder rod chamber, and oil inlet end links to each other with fuel tank; The oil inlet end of power-off protection valve links to each other with the high-voltage oil cylinder rod chamber, and oil outlet end directly links to each other with fuel tank.
Described power-off protection valve is a type pilot electromagnetism overflow valve.
Described pressure sensor is connected on the inflow pipeline of high-voltage oil cylinder.
Described high pressure folding mould valve is a three-position four-way valve.
The beneficial effect of the utility model: owing to be provided with the hydraulic circuit system of power-off protection, when high-voltage oil cylinder at packing state, if this moment, machine cut off the power supply suddenly; The electromagnet YA3 dead electricity of power-off protection valve then, magnetic valve resets under the spring force effect, and the guide of power-off protection valve controls oil and communicates with fuel tank; Main valve plug is opened, and high-voltage oil cylinder and fuel tank connect, and pressure returns zero; Guaranteed in off-position does not have because of oil cylinder, not still have hydraulic oil to cause the misoperation of machine; Each several part fluid pressure line when overhauling Hydraulic Elements after having guaranteed to cut off the power supply, element pressure is zero, thereby has protected machine and personnel's safety.
Description of drawings
Fig. 1 is the hydraulic diagram of the utility model.
The specific embodiment
As shown in Figure 1; The utility model comprises: high pressure folding mould valve V3, pillow are pressed valve V5, pressure-relief valve V4, power-off protection valve V6, pressure sensor V7, high-voltage oil cylinder I; Described high pressure folding mould valve V3 pressure hydraulic fluid port P links to each other with the oil pump oil-out; Oil return inlet T links to each other with fuel tank, and the first oil outlet end A links to each other with the control port of pressure-relief valve V4, and the second oil outlet end B presses the oil-in of valve V5 to link to each other with pillow; Pillow presses the oil outlet end of valve V5 to link to each other with the rod chamber of high-voltage oil cylinder I; The oil outlet end of pressure-relief valve V4 links to each other with the high-voltage oil cylinder rod chamber, and oil inlet end links to each other with fuel tank; The oil inlet end of power-off protection valve V6 links to each other with the high-voltage oil cylinder rod chamber, and oil outlet end directly links to each other with fuel tank.The employed power-off protection valve of present embodiment V6 is a type pilot electromagnetism overflow valve, and high pressure folding mould valve V3 is the three-position four-way valve magnetic valve, and described pressure sensor V7 is connected on the inflow pipeline of high-voltage oil cylinder I.
During machine works, the electromagnet YA3 of power-off protection valve V6 gets electric, and at this moment, power-off protection valve V6 becomes the safety protective valve of high-voltage oil cylinder, and the pressure of its setting is the maximum working pressure of high pressure cylinder.Oil pump plays pressure, and the YA1 of high pressure folding mould valve V3 holds electricly, and high-voltage oil cylinder plays pressure, and pressure sensor V7 detects high pressure cylinder pressure, when pressure arrives setup pressure value, and the YA1 of high pressure folding mould valve V3 end dead electricity, the oil pump release, high-voltage oil cylinder gets into packing state at this moment.During the high-voltage oil cylinder release, the YA2 of high pressure folding mould valve V3 holds electricly, and oil pump plays pressure, when pressure fuel pump more than or equal to this moment pressure-relief valve V4 reverse unlatching controlled pressure the time, the V4 spool is opened, the high-voltage oil cylinder release.When high-voltage oil cylinder at packing state, if this moment, machine cut off the power supply suddenly, the electromagnet YA3 dead electricity of power-off protection valve V6 then; Magnetic valve resets under the spring force effect, and the guide of power-off protection valve V6 controls oil and communicates with fuel tank, and main valve plug is opened; High-voltage oil cylinder and fuel tank connect; Pressure returns zero, has guaranteed in off-position does not have because of oil cylinder, to still have hydraulic oil to cause the misoperation of machine, each several part fluid pressure line when overhauling Hydraulic Elements after having guaranteed to cut off the power supply; Element pressure is zero, thereby has protected machine and personnel's safety.
Claims (4)
1. an injection machine has the hydraulic circuit system of power-off protection; Comprise high pressure folding mould valve (V3), pillow pressure valve (V5), pressure-relief valve (V4), power-off protection valve (V6), pressure sensor (V7), high-voltage oil cylinder (I); Described high pressure folding mould valve (V3) pressure hydraulic fluid port (P) links to each other with the oil pump oil-out; Oil return opening (T) links to each other with fuel tank, and first oil outlet end (A) links to each other with the control port of pressure-relief valve (V4), and second oil outlet end (B) presses the oil-in of valve (V5) to link to each other with pillow; Pillow presses the oil outlet end of valve (V5) to link to each other with the rod chamber of high-voltage oil cylinder (I); The oil outlet end of pressure-relief valve (V4) links to each other with the high-voltage oil cylinder rod chamber, and oil inlet end links to each other with fuel tank; The oil inlet end of power-off protection valve (V6) links to each other with the high-voltage oil cylinder rod chamber, and oil outlet end directly links to each other with fuel tank.
2. a kind of injection machine according to claim 1 has the hydraulic circuit system of power-off protection, it is characterized in that: described power-off protection valve (V6) is a type pilot electromagnetism overflow valve.
3. a kind of injection machine according to claim 1 has the hydraulic circuit system of power-off protection, it is characterized in that: described pressure sensor (V7) is connected on the inflow pipeline of high-voltage oil cylinder (I).
4. a kind of injection machine according to claim 1 has the hydraulic circuit system of power-off protection, it is characterized in that: described high pressure folding mould valve (V3) is a three-position four-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204815342U CN202378258U (en) | 2011-11-29 | 2011-11-29 | Hydraulic loop system of injection molding machine with power-off protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204815342U CN202378258U (en) | 2011-11-29 | 2011-11-29 | Hydraulic loop system of injection molding machine with power-off protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202378258U true CN202378258U (en) | 2012-08-15 |
Family
ID=46626779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204815342U Expired - Lifetime CN202378258U (en) | 2011-11-29 | 2011-11-29 | Hydraulic loop system of injection molding machine with power-off protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202378258U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451013A (en) * | 2014-12-25 | 2015-03-25 | 芜湖新兴铸管有限责任公司 | Disconnection explosion-proof protective device for blast-furnace hot blast stove |
| CN109177104A (en) * | 2018-09-29 | 2019-01-11 | 海天塑机集团有限公司 | A kind of protective device of motor injection seat |
-
2011
- 2011-11-29 CN CN2011204815342U patent/CN202378258U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451013A (en) * | 2014-12-25 | 2015-03-25 | 芜湖新兴铸管有限责任公司 | Disconnection explosion-proof protective device for blast-furnace hot blast stove |
| CN104451013B (en) * | 2014-12-25 | 2016-08-24 | 芜湖新兴铸管有限责任公司 | A kind of blast-furnace hot-air furnace power-off flame proection |
| CN109177104A (en) * | 2018-09-29 | 2019-01-11 | 海天塑机集团有限公司 | A kind of protective device of motor injection seat |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |