CN208456954U - A kind of hydraulic device - Google Patents
A kind of hydraulic device Download PDFInfo
- Publication number
- CN208456954U CN208456954U CN201821103362.3U CN201821103362U CN208456954U CN 208456954 U CN208456954 U CN 208456954U CN 201821103362 U CN201821103362 U CN 201821103362U CN 208456954 U CN208456954 U CN 208456954U
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- CN
- China
- Prior art keywords
- hydraulic
- control valve
- return
- valve
- pressure
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Abstract
The utility model discloses a kind of hydraulic devices, with fixed part and moving part, moving part is mobile relative to fixed part by hydraulic piston, and initial position is moved back by reset spring, by starting return valve, pressure actuated return movement can be applied according to scheduled, control valve opens hydraulic medium also under its opening state other than return valve and exports and there is hydraulic medium to flow into side and hydraulic medium outflow side, in order to configure hydraulic pressure unit, when return valve is opened, effect of the control valve by inflow side and the pressure of the hydraulic return medium of reflux side, due to throttling, pressure is lower in inflow side.A kind of hydraulic device of the utility model, being capable of convenient operation control valve.
Description
Technical field
The utility model relates to a kind of hydraulic tool technical field more particularly to a kind of hydraulic devices.
Background technique
Existing hydraulic tool, such as hydraulic spanner, due to having used the high temperature hydraulic fluid by tool to generate heat,
User holds the handle being centered around in the metal valve body that high-temperature, high pressure fluid passes through, it is desirable to this heat be prevented to be transferred to use
Person is on hand.Metal valve body with based on the varnished insulation of PVC, is tended to be not enough to prevent high temperature hydraulic fluid by the prior art
The heat of generation passes through, in addition, PVC base dipping is not extremely durable, it is not easy to replace, if tool damage.Due to control
Design of the valve as check-valves flows to outflow side from inflow side by control valve by the hydraulic medium of pump conveying, and control valve is located at
Leading in hydraulic fluid pressure line from hydraulic medium pump, cylinder accommodates hydraulic piston, when hydraulic medium pump is closed, outflow side
On hydraulic medium pressure so that control valve is entered open position with the bias spring that acts in same direction, to open hydraulic Jie
Matter outlet.Further, since control valve is not opened under higher system pressure, so after completing pressurized operation, when return valve
When opening, control valve still will not be opened when the reflux of hydraulic medium starts.
Utility model content
The utility model is mainly solving the technical problems that provide a kind of hydraulic device, comprising: fixed part；Movable part
Point, it is removable relative to the fixed part；Hydraulic piston keeps the moving part mobile relative to the fixed part；One
A reset spring, for the movable member to be moved to initial position by return movement；One kind can in opening state and
The return valve moved between closed state, the return movement can be by activating the return valve according to scheduled application pressure
Actuating；A kind of control valve that can be moved between opening state and closed state, the control valve are being opened in addition to return valve
Hydraulic medium outlet is opened under state, there is the control valve hydraulic medium to flow into side and hydraulic medium outflow side；Wherein, when return
When flowing valve opening, effect of the control valve by inflow side and the pressure of the hydraulic return medium of reflux side, due to throttling, pressure exists
Inflow side is lower.
It further, further include the first hydraulic medium between hydraulic medium pump, hydraulic medium pump and the control valve
The second hydraulic medium flow path between flow path and hydraulic medium pump and the return valve.
Further, wherein the control valve is arranged in the intake line for leading to hydraulic cylinder, described in the hydraulic cylinder receiving
Hydraulic piston.
It further, further include hydraulic medium memory space, wherein the control valve is under the closed state by by described
The differential power of the pressure initiation in pressure and intake line in hydraulic medium memory space acts on.
Further, wherein the intake line leads to hydraulic cylinder from hydraulic medium pump, and it is direct with return valve and control valve
Connection.
The beneficial effects of the utility model are:
A kind of hydraulic device of the utility model, being capable of convenient operation control valve.
Detailed description of the invention
Fig. 1 shows the diagram in the partial cross sectional of the front of squeezing unit.
Fig. 2 shows the expansions of the region 2-2 in Fig. 1, and wherein control valve and return valve are closed.
Fig. 3 shows diagram corresponding with Fig. 2, and control valve is opened.
Specific embodiment
The preferred embodiment of the utility model is described in detail below, so that the advantages of the utility model and feature energy
It is easier to be readily appreciated by one skilled in the art, to be more clearly defined the protection scope of the utility model.
As shown in Figure 1, hydraulic device has fixed part 2 and moving part 3, moving part 3 is opposite by hydraulic piston 4
Mobile in fixed part 2, fixed part 2 can also be considered as entire shell, and hydraulic piston 4 can be moved back to by means of reset spring 5
Its initial position, and when piston is when not in use by the spring bias to initial position, the return movement of hydraulic piston 4 can be
It is activated during pressure operation by starting return valve 6.In the exemplary embodiment, the return valve 6 such as institute in EP0944937B1
Design and operation are stated, control valve 7 influences the closing property of return valve 6, and return valve 6 is preferably no longer stayed open until hydraulic work
Plug 4 completely returns to, and under the opening state of control valve 7, generates pressure drop in the upstream of return valve 6, and the pressure drop is very big, so that
Return valve 6 is closed in advance before the arrival of hydraulic piston 4, and then, the further return movement of hydraulic piston 4 is merely due to hydraulic Jie
Matter is flowed out in hydraulic medium memory space 9 by outflow opening 8, and control valve 7 has inflow side 10 and outflow side 11, inflow side
10 refer to that control valve 7 acts on the side by hydraulic medium, and hydraulic medium is logical when hydraulic medium is by hydraulic medium 12 conveying of pump
It crosses outflow side 11 and hydraulic cylinder 14 is flowed by hydraulic medium pipeline 13, wherein hydraulic piston 4 is contained in hydraulic cylinder 4.Hydraulic pump
Can be screw pump, have the advantages that be pumped under continuous pressure, when hydraulic medium by open control valve 7, meanwhile,
But when actually also immediately moving to closed position, throttling action leads to pressure drop, closes for example, this enters the displacement being previously mentioned
Coincidence is set, the path of hydraulic return medium, with particular reference to the path of Fig. 2, is opened in the return valve 6 determined by control valve 7
When start, it allows hydraulic medium to flow through, this is because runner gap 15 as a result, since the flow path gap 15 is opposite
Smaller, this clearly results in throttling, this will lead to the pressure drop on control valve 7.It is in this state actually to flow in inflow side 10
Side out, therefore lower pressure ratio outflow side 11 is dominant.Further, it is also possible to certain back pressure is formed on outflow side 11, by
It is assisted in this pressure difference, and by compressed spring 16, which is biased to open position for control valve 7, and control valve 7
Open position is moved rapidly into according to Fig. 3.However, compressed spring 16 does not need actually to control for being typically designed
Valve 7 moves to open position, and due to passing through the flowing of outflow opening 8, there may be suction effects on open control valve 7, should
Control valve is offset by compressed spring 16.
According to the open position of Fig. 1, on the one hand, valve seat 17 shown in Fig. 3 can be arranged in such a way, so that generating
Closely or actually close valve seat 17.The opening seating portion 18 of control valve 7 interacts with housing wall 36 in a sealing fashion, shell
Body wall 36 has the contraction flow region for forming valve seat 17 in this region.As a result, the valve when control valve 7 is formed as shuttle, wherein one
A position (closed position), control valve 7 close outflow opening 8, and in another position (8 opening relative to closed position
Position), control valve 7 closes the flow that flow direction returns to valve 6, there this cause the closing of return valve 6 to be also applied for return valve 6 to be intended to
There is the case where sufficiently large lag, so that it is maintained at open position during the entire backstroke of hydraulic piston 4.Cause
This, though after returning when valve 6 open when, have time enough close hydraulic pump 12, once so that return valve 6 close and
Pump 14 will continue to convey, and control valve 7 will not be again switched off immediately.
As shown in figure 3, hydraulic medium still flows to return valve 6. when hydraulic piston 4 travels rearwardly, the relaxation of spring 5 is led
Lesser pressure is caused to be applied on hydraulic medium.Therefore, face needed for pressure drops to the opening state for maintaining return valve 6
When below boundary's pressure, return valve 6 can also be moved to closed position, arrive before hydraulic piston 4 completely returns to its final position
Reach, such as the return as fast as possible in order to realize hydraulic piston 4, control valve 7 and return valve 6 be maintained at open position until
End position.In the illustrated exemplary embodiment, adjusting is provided in this way, so that returning when control valve 7 is opened
Valve 6 immediately moves to its closed position.
The sequencing of above embodiments is not only for ease of description, represent the advantages or disadvantages of the embodiments.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (5)
1. a kind of hydraulic device characterized by comprising
Fixed part；
Moving part, it is removable relative to the fixed part；
Hydraulic piston keeps the moving part mobile relative to the fixed part；
One reset spring, for the movable member to be moved to initial position by return movement；
A kind of return valve that can be moved between opening state and closed state, the return movement can be by activating described return
Flow valve and according to it is scheduled apply it is pressure actuated；
A kind of control valve that can be moved between opening state and closed state, the control valve is in addition to return valve is in open shape
Hydraulic medium outlet is opened under state, there is the control valve hydraulic medium to flow into side and hydraulic medium outflow side；
Wherein, when return valve is opened, effect of the control valve by inflow side and the pressure of the hydraulic return medium of reflux side, by
In throttling, pressure is lower in inflow side.
2. a kind of hydraulic device according to claim 1, it is characterised in that: further include hydraulic medium pump, hydraulic Jie
The between the first hydraulic medium flow path and hydraulic medium pump and the return valve between matter pump and the control valve
Two hydraulic medium flow paths.
3. a kind of hydraulic device according to claim 1, it is characterised in that: wherein control valve setting lead to it is hydraulic
In the intake line of cylinder, the hydraulic cylinder accommodates the hydraulic piston.
4. a kind of hydraulic device according to claim 3, it is characterised in that: it further include hydraulic medium memory space, wherein
The control valve is under the closed state by by the pressure in the pressure and intake line in the hydraulic medium memory space
The differential power of formation acts on.
5. a kind of hydraulic device according to claim 3, it is characterised in that: wherein the intake line is pumped from hydraulic medium
Lead to hydraulic cylinder, and is directly connected to return valve and control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821103362.3U CN208456954U (en) | 2018-07-12 | 2018-07-12 | A kind of hydraulic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821103362.3U CN208456954U (en) | 2018-07-12 | 2018-07-12 | A kind of hydraulic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208456954U true CN208456954U (en) | 2019-02-01 |
Family
ID=65170784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821103362.3U Expired - Fee Related CN208456954U (en) | 2018-07-12 | 2018-07-12 | A kind of hydraulic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208456954U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591176A (en) * | 2018-07-12 | 2018-09-28 | 江阴盛鼎机械制造有限公司 | a kind of hydraulic device |
-
2018
- 2018-07-12 CN CN201821103362.3U patent/CN208456954U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591176A (en) * | 2018-07-12 | 2018-09-28 | 江阴盛鼎机械制造有限公司 | a kind of hydraulic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190201 Termination date: 20210712 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |