CN205859278U - A kind of direct-acting overflow valve - Google Patents
A kind of direct-acting overflow valve Download PDFInfo
- Publication number
- CN205859278U CN205859278U CN201620868464.9U CN201620868464U CN205859278U CN 205859278 U CN205859278 U CN 205859278U CN 201620868464 U CN201620868464 U CN 201620868464U CN 205859278 U CN205859278 U CN 205859278U
- Authority
- CN
- China
- Prior art keywords
- valve
- spool
- direct acting
- acting type
- valve pocket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of direct acting type overflow valve, including valve body, the valve pocket of band cavity is set in valve body, the bottom of valve pocket arranges liquid outlet and valve seat, inlet is set on valve seat, inlet and the connection of liquid outlet is disconnected when spool pushes against valve seat, when arranging pressure spring between end cap and valve pocket, the top of this pressure spring is connected with the adjusting rod being fixed on end cap, bottom is then connected with the sealing piston being arranged on valve pocket cavity inner spool top, seal piston, between spool and valve pocket, form sealed gas chamber, filling high pressure gas in this sealed gas chamber.Direct acting type overflow valve disclosed in the utility model, pressure spring acts on spool by gases at high pressure (i.e. air spring), i.e. air spring is connected with common spring, owing to the rigidity of air spring is little, after series connection, global stiffness reduces, and owing to the compressibility of air makes air spring itself have the effect of buffer shock-absorbing, the pressure overshoot amount that can reduce overflow valve makes the steady-state error of overflow valve reduce accordingly.
Description
Technical field
This utility model belongs to hydraulic control component field, a kind of based on air spring straight particularly in this field
Dynamic formula overflow valve.
Background technology
Overflow valve because be swift in response, the advantage such as stain resistance, low cost, in transportation, engineer equipment, military equipment
Have in field and use widely.Common direct acting type overflow valve operation principle is as shown in Figure 1.
When the hydraulic coupling that the work characteristics of overflow valve is treated as being used on spool is increased to more than pressure spring power, spool will
Lifting off a seat, open valve port, then the liquid in valve is through valve port overflow return tank, and now valve has certain opening degree, valve port
Liquid-flow state meets pressure flow equation, and the inlet pressure of valve depends primarily on the preload pressure of pressure spring, regulation spring
Decrement, gets final product the inlet pressure of regulation relief valve, thus controls or limit the outlet pressure of hydraulic pump.Due to spring rate relatively
Greatly, the steady-state error that can cause overflow valve is bigger.
Utility model content
Technical problem to be solved in the utility model is just to provide the direct acting type overflow that a kind of work steady-state error is less
Valve.
This utility model adopts the following technical scheme that
A kind of direct acting type overflow valve, including valve body, arranges the valve pocket of band cavity, is arranged at the end cap on valve body top in valve body
In stretching into valve body and being connected with valve pocket, the bottom of valve pocket arranges liquid outlet and valve seat, and valve seat arranges inlet, and spool is arranged
In the cavity of valve pocket and can move up and down along valve pocket, disconnect inlet and the connection of liquid outlet when spool pushes against valve seat, when
Spool makes inlet and liquid outlet communicate after departing from valve seat, and it thes improvement is that: arrange pressure regulation bullet between end cap and valve pocket
Spring, the top of this pressure spring is connected with the adjusting rod being fixed on end cap, bottom then be arranged on valve pocket cavity inner spool
The sealing piston on top is connected, and seals piston, forms sealed gas chamber between spool and valve pocket, fills height in this sealed gas chamber
Calming the anger body, the resilience force compressing of pressure spring seals piston and acts on spool by gases at high pressure and makes it push against valve seat.
Further, described adjusting rod for threadeding with end cap, rotates adjusting rod and pressure spring can be made in regulation
Bar and seal between piston flexible to adjust the pretightning force of pressure spring.
Further, described adjusting rod is connected with end cap by adjusting nut.
Further, inlet and other interelement of liquid outlet and hydraulic system use board-like connection or tubular type connection.
Further, described valve seat is fixedly connected with the valve body by nut and pad.
Further, it is provided with sealing member between described end cap and valve body.
Further, sealing between piston and valve pocket and be provided with sealing ring between spool and valve pocket.
Further, described spool is cone valve.
Further, described gases at high pressure are pressure-air.
The beneficial effects of the utility model are:
Direct acting type overflow valve disclosed in the utility model, pressure spring is acted on by gases at high pressure (i.e. air spring)
Spool, i.e. air spring are connected with common spring, and owing to the rigidity of air spring is little, after series connection, global stiffness reduces, and due to sky
The compressibility of gas makes air spring itself have the effect of buffer shock-absorbing, and the pressure overshoot amount that can reduce overflow valve makes to overflow
The steady-state error of stream valve reduces accordingly, not only solves the problem that steady-state process fluctuation is bigger, also solves conventional springs formula and overflows
The problem that stream valve work steady-state error is bigger.
Accompanying drawing explanation
Fig. 1 is the principle schematic of direct acting type overflow valve in prior art；
Fig. 2 is the structural representation of the direct acting type overflow valve based on air spring disclosed in this utility model embodiment 1.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
Embodiment 1, as in figure 2 it is shown, present embodiment discloses a kind of direct acting type overflow valve, including valve body 1, sets in valve body 1
Put the valve pocket 2 of band cavity, be arranged in the end cap 3 on valve body 1 top stretches into valve body 1 and be connected with valve pocket 2, the bottom of valve pocket 2
Liquid outlet 4 and valve seat 5 are set, valve seat 5 arranges inlet 6, in spool 7 is arranged at the cavity of valve pocket 2 and can be along valve pocket about 2
Mobile, disconnect inlet 6 and the connection of liquid outlet 4 when spool 7 pushes against valve seat 5, after spool 7 departs from valve seat 5, make inlet 6
Communicate with liquid outlet 4, pressure spring 8 be set between end cap 3 and valve pocket 2, the top of this pressure spring 8 be fixed on end cap 3
On adjusting rod 9 be connected, bottom is then connected with the sealing piston 10 being arranged on valve pocket 2 cavity inner spool 7 top, seal live
Plug 10, formation sealed gas chamber, filling high pressure gas in this sealed gas chamber, the resilience of pressure spring 8 between spool 7 and valve pocket 2
Power compressing sealing piston 10 acts on spool 7 by gases at high pressure makes it push against valve seat 5.In the present embodiment, described high pressure
Gas is pressure-air.
Alternatively, in the present embodiment, described adjusting rod 9, turns for threadeding with end cap 3
Dynamic adjusting rod 9 can make pressure spring 8 at adjusting rod 9 and seal between piston 10 flexible to adjust the pretightning force of pressure spring 8.
Described adjusting rod 9 is connected with end cap 3 by adjusting nut 11.Inlet 6 and liquid outlet 4 and other interelement of hydraulic system
Board-like connection or tubular type is used to connect.Described valve seat is fixedly connected with the valve body by nut and pad.Described end cap 3 and valve
Sealing member 12 it is provided with between body 1.Sealing between piston 10 and valve pocket 2 and be provided with sealing between spool 7 and valve pocket 2
Circle 13.Described spool is cone valve.
The work process of the direct acting type overflow valve based on air spring disclosed in the present embodiment is: according to requirements set
The range of regulation of meter, rotates adjusting rod to adjust the pretightning force of pressure spring so that after pressure spring is connected with gases at high pressure
Pretightning force reaches to design requirement.Work as inlet hydraulic, such as, when input pressure is less, spool is at pressure spring and the work of gases at high pressure
Push against valve seat, inlet and liquid outlet under with to disconnect.Working as inlet hydraulic, such as input pressure raises, and spool lower end produces
Active force more than the pretightning force of pressure spring time, spool climbs away valve seat, and valve port is opened, inlet and liquid outlet phase
Logical, unnecessary oil is flow back to fuel tank.
Clearly as gases at high pressure itself have the effect of compressibility and buffer shock-absorbing, make overflow valve steady from one
State reaches response fluctuation in another steady-state process and reduces.Meanwhile, connect with the air spring rigidity of rear spring of conventional springs subtracts
Little, it is possible to the pressure overshoot amount reducing overflow valve makes the steady-state error of overflow valve reduce accordingly, thus promotes the work of overflow valve
Make performance.
Claims (9)
1. a direct acting type overflow valve, including valve body, arranges the valve pocket of band cavity in valve body, the end cap being arranged at valve body top is stretched
In entering valve body and being connected with valve pocket, the bottom of valve pocket arranges liquid outlet and valve seat, and valve seat arranges inlet, and spool is arranged at
The cavity of valve pocket is interior and can move up and down along valve pocket, disconnects inlet and the connection of liquid outlet when spool pushes against valve seat, works as valve
Core makes inlet and liquid outlet communicate after departing from valve seat, it is characterised in that: pressure spring is set between end cap and valve pocket, this tune
The top of pressing spring is connected with the adjusting rod being fixed on end cap, bottom then be arranged on the close of valve pocket cavity inner spool top
Envelope piston is connected, and seals piston, forms sealed gas chamber between spool and valve pocket, filling high pressure gas in this sealed gas chamber,
The resilience force compressing sealing piston of pressure spring acts on spool by gases at high pressure makes it push against valve seat.
Direct acting type overflow valve the most according to claim 1, it is characterised in that: described adjusting rod and end cap are that screw thread connects
Connect, rotate adjusting rod and pressure spring can be made at adjusting rod and to seal between piston flexible to adjust the pretightning force of pressure spring.
Direct acting type overflow valve the most according to claim 2, it is characterised in that: described adjusting rod passes through adjusting nut and end
Lid is connected.
Direct acting type overflow valve the most according to claim 1, it is characterised in that: inlet and liquid outlet and hydraulic system other
Interelement uses board-like connection or tubular type to connect.
Direct acting type overflow valve the most according to claim 1, it is characterised in that: described valve seat is by nut and pad and valve
Body is fixing to be connected.
Direct acting type overflow valve the most according to claim 1, it is characterised in that: it is provided with close between described end cap and valve body
Sealing.
Direct acting type overflow valve the most according to claim 1, it is characterised in that: sealing between piston and valve pocket and spool
And between valve pocket, it is provided with sealing ring.
Direct acting type overflow valve the most according to claim 1, it is characterised in that: described spool is cone valve.
Direct acting type overflow valve the most according to claim 1, it is characterised in that: described gases at high pressure are pressure-air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620868464.9U CN205859278U (en) | 2016-08-11 | 2016-08-11 | A kind of direct-acting overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620868464.9U CN205859278U (en) | 2016-08-11 | 2016-08-11 | A kind of direct-acting overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205859278U true CN205859278U (en) | 2017-01-04 |
Family
ID=57593691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620868464.9U Withdrawn - After Issue CN205859278U (en) | 2016-08-11 | 2016-08-11 | A kind of direct-acting overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205859278U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090362A (en) * | 2016-08-11 | 2016-11-09 | 中国海洋大学 | A kind of direct-acting overflow valve |
| CN109058213A (en) * | 2018-11-05 | 2018-12-21 | 李军 | A kind of valve |
| CN111981160A (en) * | 2019-05-24 | 2020-11-24 | 浙江三花汽车零部件有限公司 | Multi-way valve and heat pump system |
| CN112610553A (en) * | 2020-11-25 | 2021-04-06 | 杨明虎 | Booster-type overflow valve |
-
2016
- 2016-08-11 CN CN201620868464.9U patent/CN205859278U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090362A (en) * | 2016-08-11 | 2016-11-09 | 中国海洋大学 | A kind of direct-acting overflow valve |
| CN106090362B (en) * | 2016-08-11 | 2018-03-23 | 中国海洋大学 | A kind of direct-acting overflow valve |
| CN109058213A (en) * | 2018-11-05 | 2018-12-21 | 李军 | A kind of valve |
| CN109058213B (en) * | 2018-11-05 | 2019-12-03 | 万静琼 | A kind of valve |
| CN111981160A (en) * | 2019-05-24 | 2020-11-24 | 浙江三花汽车零部件有限公司 | Multi-way valve and heat pump system |
| CN112610553A (en) * | 2020-11-25 | 2021-04-06 | 杨明虎 | Booster-type overflow valve |
| CN112610553B (en) * | 2020-11-25 | 2022-12-06 | 浙江绿洲制冷设备有限公司 | Booster-type overflow valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170104 Effective date of abandoning: 20180323 |