CN203614485U - Overflow valve - Google Patents
Overflow valve Download PDFInfo
- Publication number
- CN203614485U CN203614485U CN201320656907.4U CN201320656907U CN203614485U CN 203614485 U CN203614485 U CN 203614485U CN 201320656907 U CN201320656907 U CN 201320656907U CN 203614485 U CN203614485 U CN 203614485U
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- Prior art keywords
- valve
- passage
- pilot
- pilot valve
- damper
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- Expired - Fee Related
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Abstract
The utility model relates to an overflow valve, which comprises a main valve and a pilot valve, wherein the pilot valve is arranged at the upper side of the main valve and is connected with the main valve in a sealed way, two ends of the pilot valve are respectively provided with sealing screw bolts, a valve core installing passage is arranged in the pilot valve, a valve core structure is arranged in the valve core installing passage, a liquid inlet passage is arranged on a valve body of the main valve, a main valve core is arranged in the liquid inlet passage, one side of the liquid inlet passage is provided with a liquid outlet passage, the liquid outlet passage is connected with the valve core installing passage through a first connecting passage, the other side of the liquid inlet passage is connected with the end part of the valve core structure of the pilot valve through the first pressure control structure, the main valve core is connected with the end part of the valve core structure of the pilot valve through a second pressure control structure, and an electromagnetic valve is also arranged on the pilot valve. The overflow valve has the advantages that the unloading can be carried out at any moment through the electromagnetic valve, the flowing capability of the overflow valve is high, the noise is low, the opening and closing characters are good, the performance is stable, the pressure oil is stable, and the control precision is high.
Description
Technical field
The utility model relates to a kind of hydrovalve, especially a kind of relief valve.
Background technique
Relief valve is a kind of hydraulic pressure control valve, a main level pressure overflow, voltage stabilizing in hydraulic equipment, with safety protection effect, in metering pump throttling regulating system, metering pump provides constant flow rate, in the time that system pressure increases, can make traffic demand reduce, now relief valve is opened, and makes the unnecessary flow oil sump tank that overflows, guarantee relief valve inlet pressure, i.e. pump discharge pressure constant (valve port is often opened with pressure surge); Relief valve is connected on oil circuit, and relief valve produces back pressure, and moving element stationarity increases, and has played the effect of voltage stabilizing.
Traditional relief valve mainly comprises valve body, be arranged on the main valve seat of valve body one end, the pilot valve spring that is arranged on the guide valve core in this valve body and is connected with this guide valve core, on main valve seat, be provided with pilot valve oil back chamber, main valve chamber, pilot valve oil back chamber spill port and main valve spill port, this relief valve there will be the unsettled phenomenon of pressure oil control, control accuracy is not high, at any time off-load.
Model utility content
The purpose of this utility model is in order to solve the existing defect of relief valve in prior art, one off-load to be at any time provided, and pressure oil is stable, the relief valve that control accuracy is high.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of relief valve, the pilot valve that comprises main valve and be arranged on this main valve top and be tightly connected with it, the two ends of described pilot valve are equipped with sealing bolt, be provided with spool passage is installed in described pilot valve, in this spool is installed passage, are provided with valve core structure;
The valve body of described main valve is provided with feed pathway, in this feed pathway, be provided with main valve plug, one side of described feed pathway is provided with liquid outlet channel, this liquid outlet channel is installed passage by the first connecting passage and described spool and is connected, the opposite side of described feed pathway is connected with the valve core structure end of described pilot valve by the first pressure control structure, and described main valve plug is connected with the valve core structure end of described pilot valve by the second pressure control structure; On described pilot valve, be also provided with solenoid valve.
Above-mentioned a kind of relief valve, described valve core structure comprises and is arranged on the Compress Spring of described pilot valve sealing bolt one side and is sleeved on the cone valve on this Compress Spring.
Above-mentioned a kind of relief valve, described the first pressure control structure comprises the second connecting passage that the first damper of being arranged on a side of described feed pathway and being positioned at described main valve plug lower end and two ends are tightly connected with described the first damper and pilot valve respectively.
Above-mentioned a kind of relief valve, described the second connecting passage is also provided with Seal cage with the side that described the first damper is connected, and sealing chamber is provided with outside control mouth.
Above-mentioned a kind of relief valve, described the second pressure control structure comprises and is arranged on the second damper of described main valve plug upper end and the 3rd connecting passage that two ends are connected with described the second damper and one side sealing of described cone valve respectively.
Above-mentioned a kind of relief valve, is also provided with a guiding valve between described Compress Spring and sealing bolt, Compress Spring is fixed on a side of guiding valve, is provided with outer row mouthful on this guiding valve.
The beneficial effects of the utility model are: this relief valve can carry out off-load by solenoid valve any time, the second pressure control structure between the first pressure control structure and main valve plug and the valve core structure of feed pathway one side has guaranteed the stability that pressure oil is supplied with, guarantee the control accuracy of relief valve, the negotiability of this relief valve is strong, noise is low, open and shut characteristic is good, stable performance, outside control mouth on the Seal cage that the side being connected with the first damper at the second connecting passage is provided with has also played the effect of off-load and has limited the pressure maximum of pressure oil, play the effect of auxiliary off-load.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model
Embodiment
For making that structure characteristic of the present utility model and effect of reaching are had and further understand and be familiar with, coordinate detailed explanation in order to preferred embodiment and accompanying drawing, be described as follows:
As shown in Figure 1, a kind of relief valve, the pilot valve 2 that comprises main valve 1 and be arranged on this main valve 1 top and be tightly connected with it, the two ends of pilot valve 2 are equipped with sealing bolt, in pilot valve 1, be provided with spool passage 3 is installed, in this spool is installed passage 3, be provided with valve core structure;
The valve body of main valve 1 is provided with feed pathway 4, in this feed pathway 4, be provided with main valve plug 5, one side of feed pathway 4 is provided with liquid outlet channel 10, this liquid outlet channel 10 is installed passage 3 by the first connecting passage 6 and spool and is connected, the opposite side of feed pathway 4 is connected with the valve core structure end of pilot valve 2 by the first pressure control structure, and main valve plug 5 is connected with the valve core structure end of pilot valve 2 by the second pressure control structure; On pilot valve 2, be also provided with solenoid valve 7.
Valve core structure comprises and is arranged on the Compress Spring 8 of pilot valve 2 sealing bolt one sides and is sleeved on the cone valve 9 on this Compress Spring 8.
The first pressure control structure comprises the second connecting passage 12 that the first damper 11 of being arranged on a side of feed pathway 4 and being positioned at main valve plug 5 lower ends and two ends are tightly connected with the first damper 11 and pilot valve 2 respectively, the second connecting passage 12 is also provided with Seal cage 13 with the side that the first damper 11 is connected, sealing chamber is provided with outside control mouth 14, has played the effect of auxiliary off-load; The second pressure control structure comprises and is arranged on the second damper 15 of main valve plug 5 upper ends and the 3rd connecting passage 16 that two ends are connected with the second damper 15 and cone valve 9 one side sealings respectively.
Further improve as the utility model, be also provided with a guiding valve 17 between Compress Spring 8 and sealing bolt, Compress Spring 8 is fixed on a side of guiding valve 17, is provided with outer row's mouth 18 on this guiding valve 17.
In the time that this relief valve is started working, when pressure oil enters into the lower end that acts on main valve plug 5 in feed pathway 4, act on the upper end of main valve plug 5 and the cone valve 9 of pilot valve 2 by the first damper 11 and the second damper 15, enter hydraulic coupling on pilot valve 2 and offset the ouput force of the setting value of solenoid valve 7, in the time that the pressure of system exceedes the ouput force of solenoid valve 7, cone valve 9 is opened, the pressure of main valve plug 5 upper ends is by the second damper 15 simultaneously, the 3rd connecting passage 16, spool is installed by passage 3 and the first connecting passage 6 is back to liquid outlet channel 10 or flows back to fuel tank by the outer row's mouth 18 on guiding valve 17, when the pressure oil of this relief valve passes through the first damper 11 and the second damper 15, on main valve plug 5, produce a pressure difference, main valve plug 5 is opened under the effect of this pressure difference, under the pressure of now setting up at Compress Spring 8, pressure oil flows to liquid outlet channel 10 off-loads from feed pathway 4, because the ouput force of setting by solenoid valve 7 is controlled the open and close of pilot valve 2, so this relief valve can carry out off-load by 7 any times of solenoid valve, this relief valve negotiability is strong, noise is low, open and shut characteristic is good, stable performance.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope of the present utility model.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (6)
1. a relief valve, the pilot valve that comprises main valve and be arranged on this main valve top and be tightly connected with it, the two ends of described pilot valve are equipped with sealing bolt, be provided with spool passage is installed in described pilot valve, in this spool is installed passage, are provided with valve core structure;
The valve body of described main valve is provided with feed pathway, in this feed pathway, is provided with main valve plug, and a side of described feed pathway is provided with liquid outlet channel, and this liquid outlet channel is installed passage by the first connecting passage and described spool and is connected, and it is characterized in that:
The opposite side of described feed pathway is connected with the valve core structure end of described pilot valve by the first pressure control structure, and described main valve plug is connected with the valve core structure end of described pilot valve by the second pressure control structure; On described pilot valve, be also provided with solenoid valve.
2. a kind of relief valve according to claim 1, is characterized in that, described valve core structure comprises and is arranged on the Compress Spring of described pilot valve sealing bolt one side and is sleeved on the cone valve on this Compress Spring.
3. a kind of relief valve according to claim 1, it is characterized in that, described the first pressure control structure comprises the second connecting passage that the first damper of being arranged on a side of described feed pathway and being positioned at described main valve plug lower end and two ends are tightly connected with described the first damper and pilot valve respectively.
4. a kind of relief valve according to claim 3, is characterized in that, described the second connecting passage is also provided with Seal cage with the side that described the first damper is connected, and sealing chamber is provided with outside control mouth.
5. a kind of relief valve according to claim 2, it is characterized in that, described the second pressure control structure comprises and is arranged on the second damper of described main valve plug upper end and the 3rd connecting passage that two ends are connected with described the second damper and one side sealing of described cone valve respectively.
6. a kind of relief valve according to claim 2, is characterized in that, is also provided with a guiding valve between described Compress Spring and sealing bolt, and Compress Spring is fixed on a side of guiding valve, is provided with outer row mouthful on this guiding valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320656907.4U CN203614485U (en) | 2013-10-23 | 2013-10-23 | Overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320656907.4U CN203614485U (en) | 2013-10-23 | 2013-10-23 | Overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614485U true CN203614485U (en) | 2014-05-28 |
Family
ID=50767134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320656907.4U Expired - Fee Related CN203614485U (en) | 2013-10-23 | 2013-10-23 | Overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614485U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989838A (en) * | 2017-10-26 | 2018-05-04 | 浙江科力车辆控制***有限公司 | Commercial car unloading valve |
| CN115111229A (en) * | 2022-07-20 | 2022-09-27 | 北京天玛智控科技股份有限公司 | Flow resistance detection system of hydraulic valve |
-
2013
- 2013-10-23 CN CN201320656907.4U patent/CN203614485U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989838A (en) * | 2017-10-26 | 2018-05-04 | 浙江科力车辆控制***有限公司 | Commercial car unloading valve |
| CN115111229A (en) * | 2022-07-20 | 2022-09-27 | 北京天玛智控科技股份有限公司 | Flow resistance detection system of hydraulic valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20151023 |
|
| EXPY | Termination of patent right or utility model |