CN208294884U - A kind of unidirectional speed-limiting device - Google Patents
A kind of unidirectional speed-limiting device Download PDFInfo
- Publication number
- CN208294884U CN208294884U CN201820399333.XU CN201820399333U CN208294884U CN 208294884 U CN208294884 U CN 208294884U CN 201820399333 U CN201820399333 U CN 201820399333U CN 208294884 U CN208294884 U CN 208294884U
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- China
- Prior art keywords
- connector
- spool
- valve
- valve body
- body cavity
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- 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- Withdrawn - After Issue
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- Sliding Valves (AREA)
Abstract
The utility model relates to a kind of unidirectional speed-limiting devices, including valve body, spool, valve body is equipped with the first connector, second connector, valve port, spool along spool axis direction sliding can closure or openness valve port make the first connector, second connector is communicated or is disconnected, plunger shaft is equipped in valve body, spool outwardly convex is equipped with the piston being adapted to plunger shaft, body cavity is separated into first-class body cavity by piston and valve port, second body cavity, first connector is communicated with first-class body cavity holding, valve port is connected to first-class body cavity and the second connector, equipped with the fluid channel for being greater than valve port in valve body equipped with flow resistance in valve body, fluid channel is connected to the second connector and second body cavity, spool outer wall is intracavitary equipped with the inclined-plane or curved surface that favour spool glide direction in first fluid, elastic component is equipped between piston and valve body.For flow control in hydraulic system, the blank of hydraulic system adaptive throttling switch has been filled up.
Description
Technical field
The utility model relates to a kind of unidirectional speed-limiting devices.
Background technique
Pipeline explosion-proof valve can be generally equipped on existing fluid pressure line, when fluid pressure line breaking blasting, pipeline is explosion-proof
Valve can block fluid pressure line, prevent from rushing down outside the oil liquid in hydraulic actuating mechanism and fluid pressure line, stop hydraulic actuating mechanism
Work.Existing pipeline explosion-proof valve be based on facilitating valve both ends to there is larger pressure difference to be just able to achieve closure function, and it is anti-for flow velocity
Should be very insensitive or even reactionless, and cause leakage, flow velocity to increase when small crack or oil connection appearance loosening occurs in oil pipe
When to 3 times of normal working flow rate, pipeline explosion-proof valve is all without any reaction.According to relevant industries standard, hydraulicefficiency elevation structure
No more than 3 times of operating rate, existing pipeline explosion-proof valve obviously cannot be met the requirements maximum speed.
Utility model content
The utility model is in view of the above-mentioned problems, provide a kind of unidirectional speed-limiting device.
Technical solution adopted in the utility model is as follows: a kind of unidirectional speed-limiting device, including valve body, spool, the valve
Body is equipped with the first connector, the second connector, valve port, and the spool can closure or openness valve port along the sliding of spool axis direction
So that the first connector, the second connector is communicated or is disconnected, be equipped with plunger shaft in the valve body, the spool outwardly convex be equipped with
The piston of the plunger shaft adaptation, the body cavity is separated into first-class body cavity, second body cavity by piston and valve port, described
First connector is communicated with first-class body cavity holding, the valve port connection first-class body cavity and the second connector, in the valve body
Equipped with fluid channel of the flow resistance greater than valve port is equipped in the valve body, the fluid channel is connected to the second connector and second fluid
Chamber, the spool outer wall favour the inclined-plane or curved surface of spool glide direction in intracavitary be equipped with of first fluid, the piston and valve
Elastic component is equipped between body.
The spool close to one end of valve port be taper.
The conical inboard wall that taper is equipped with adaptation is corresponded in the valve body.
Adjusting screw is threaded on the valve body, it is intracavitary that the adjusting screw protrudes into second fluid.
The elastic component is spring, and the both ends of the spring is respectively held against piston and valve body.
The beneficial effects of the utility model are as follows: by setting inclined-plane or curved surface, change the static pressure direction of fluid, this
Sample acts on inclined-plane or curved surface and is less than the work along spool moving direction for acting on in-plane along the active force of spool glide direction
Firmly；By the way that the biggish fluid channel of flow resistance is arranged, there is static pressure difference in the moment for changing piston both ends in valve port flow.This
Sample, when leaking occurs in hydraulic system pipeline or damaged, valve port flow is more than setting value, which can close oil circuit, be
It unites out of service.Operator can find the problem at the first time, can be avoided a large amount of leakages of hydraulic oil.For hydraulic system
Middle flow control has filled up the blank of hydraulic system adaptive throttling switch.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of spool in Fig. 1.
In figure, 1, valve body；101, the first connector；102, the second connector；103, valve port；104, fluid channel；105,
Conical inboard wall；106, first-class body cavity；107, second body cavity；2, spool；201, piston；203, inclined-plane or curved surface；3, piston
Chamber；4, elastic component；5, adjust screw.
Specific embodiment
With reference to the accompanying drawing and specific embodiment, the utility model can be better described.
A kind of unidirectional speed-limiting device, including valve body 1, spool 2, the valve body 1 connect equipped with the first connector 101, second
Interface 102, valve port 103, the spool 2 along 2 axis direction of spool sliding can closure or openness valve port 103 make the first connector
101, the second connector 102 is communicated or is disconnected, and plunger shaft 3 is equipped in the valve body 1, and 2 outwardly convex of spool is equipped with and institute
The piston 201 of the adaptation of plunger shaft 3 is stated, 1 inner cavity of valve body is separated into first-class body cavity 106, the by piston 201 and valve port 103
Two fluid cavitys 107, first connector 101 are communicated with the holding of first-class body cavity 106, and the valve port 103 is connected to first fluid
Chamber 106 and the second connector 102, the valve body 1 are interior equipped with the fluid channel for being greater than valve port 103 in the valve body 1 equipped with flow resistance
104, the fluid channel 104 is connected to the second connector 102 and second body cavity 107, and 2 outer wall of spool is in first-class body cavity
It is equipped with the inclined-plane or curved surface 203 for favouring 2 glide direction of spool in 106, elastic component is equipped between the piston 201 and valve body 1
4, elastic component is compressed spring, there is downward thrust to piston.
According to Hydrostatic Transfer Device principle, (pressure that any point is born in static oil liquid is equal, the static pressure direction of oil liquid
Always perpendicular to bearing surface), the active force along spool glide direction for acting on inclined-plane is the size and inclined-plane of F=P*S*a(a
Gradient it is related)；The active force along spool glide direction for acting on plane is F=P*S.When the pressure at piston both ends is equal, make
Used in the small active force and pressure along spool sliding for acting on piston inclined-plane of the active force along the sliding of spool direction of piston flat surface
The sum of contracting spring restoring force.So to be parked in top pillar section stationary for piston.Valve port opens the maximum value to setting.When valve port
The moment that flow increases suddenly, according to Bernoulli's theorem, in a fluid system, flow velocity is faster, and the pressure that fluid generates is got over
It is small, therefore piston can reduce moment in the static pressure that first-class body cavity one end is born.However the second connector 102 and second of connection
The 104 convection current body of fluid channel of fluid cavity 107 forms biggish liquid resistance.So reduce when the static pressure that piston beveled end is born
Same time, static pressure that piston flat surface end is born and apparently without reduction.So work as the moment of increased flow capacity at valve port, it is living
The static pressure that plug both ends are born is changed, when the static pressure that piston flat surface end is born has been more than that piston beveled end is held
The static pressure received and spring restoring force and when, piston is mobile to valve port, close port.Setting in this way makes to limit
Stream device greatly increases the sensitivity of changes in flow rate.So device reflection is sensitive, hydraulic hoisting machine can be realized unidirectional
Speed limit can close hydraulic fluid port when flow is more than the maximum value of setting, guarantee the safe and reliable of elevator.
The mode that fluid channel 104 increases flow resistance can be by reduced inner diameter, increase length, the tortuous position of setting etc..
The spool 2 close to one end of valve port 103 be taper.The size that a can be calculated by the gradient of tapered surface, can be with
Control sensitivity as needed.
The conical inboard wall 105 that taper is equipped with adaptation is corresponded in the valve body 1.When valve port closure, the first taper 203 and cone
Shape inner wall 105 is bonded, and is reduced the active force of fluid, is conducive to the pressure maintaining effect of the second connector, so after oil circuit goes wrong
It is easy to maintenance, quick, safe.Moreover, in this way can be to avoid the hydraulic oil occurred due to pipeline is damaged or oil connection loosens
A large amount of leakages, result in waste of resources and environmental pollution.
It is threaded on the valve body 1 and adjusts screw 5, the adjusting screw 5 protrudes into second body cavity 107.It adjusts
Screw 5 protrudes into second body cavity 107, and when resisting spool 2, maximum distance between spool and valve port passes through rotation and adjusts spiral shell
Nail can change the distance between piston and valve port, the opening degree of adjustable valve port, so that working flow rate size is adjusted, it is convenient
And it is reliable.
The elastic component 4 is spring, and the both ends of the spring is respectively held against piston 201 and valve body 1.The elastic component 4 is circle
Column compressed spring.When the pressure of the first connector 101 is equal to the pressure of the second connector 102, i.e. oil circuit normal condition passes through
Spring keeps it turning on valve port.
In hydraulic hoisting machine, oil line pipe is directly connected to oil cylinder, when oil line pipe is revealed, in-oil cylinder oil meeting
Reflux oil return line pipeline is flowed out from the cut of oil line pipe meeting crack, if at this time without it is noted that in-oil cylinder have meeting unrestrained
Take, more seriously will form serious pollution in the high-cleanness, highs Work places such as pharmacy, food, seriously affect production and production
Product, in addition, when there is personnel station below hydraulic hoisting machine, the tangible risk at casualties.The present apparatus is mounted on hydraulic
When elevator, the first connector 101 is connected into oil line pipe, the second connector 102 connects oil cylinder, when oil line pipe occurs
When leakage, the static pressure of the first connector 101 is reduced rapidly, and in-oil cylinder oil can be returned the first connection by 102 reflux of the second connector
Mouth 101, and flow velocity is accelerated suddenly, present apparatus meeting fast reaction is closed, and hydraulic pressure lift chance is out of service, and staff can examine
Feel exception, is checked.The present apparatus can be used for other pairs of flow controls and need the higher hydraulic circuit of sensitivity.
The foregoing is merely an embodiment of the present invention, are not used to limit the protection scope of the utility model；
The protection scope of the utility model is limited by the claim in claims, and all according to equivalent made by utility model
Variation and modification, all within the protection scope of the utility model patent.
Claims (5)
1. a kind of unidirectional speed-limiting device, including valve body (1), spool (2), the valve body (1) be equipped with the first connector (101),
Second connector (102), valve port (103), the spool (2) can closure or openness valve ports along the sliding of spool (2) axis direction
(103) the first connector (101), the second connector (102) is made to communicate or disconnect, it is characterised in that: to be equipped in the valve body (1)
Plunger shaft (3), spool (2) outwardly convex are equipped with the piston (201) being adapted to the plunger shaft (3), and the valve body (1) is interior
Chamber is separated into first-class body cavity (106), second body cavity (107), first connector by piston (201) and valve port (103)
(101) it keeps communicating with first-class body cavity (106), valve port (103) connection first-class body cavity (106) and the second connector
(102), it is greater than the fluid channel (104) of valve port (103), fluid channel (104) connection in the valve body (1) equipped with flow resistance
Second connector (102) and second body cavity (107), spool (2) outer wall are equipped with inclination in first-class body cavity (106)
In the inclined-plane or curved surface (203) of spool (2) glide direction, elastic component (4) are equipped between the piston (201) and valve body (1).
2. unidirectional speed-limiting device according to claim 1, it is characterised in that: the spool (2) is close to the one of valve port (103)
End is taper.
3. unidirectional speed-limiting device according to claim 2, it is characterised in that: correspond to taper in the valve body (1) equipped with suitable
The conical inboard wall (105) matched.
4. unidirectional speed-limiting device according to claim 1-3, it is characterised in that: screw thread connects on the valve body (1)
It is connected to and adjusts screw (5), the adjusting screw (5) is protruded into second body cavity (107).
5. unidirectional speed-limiting device according to claim 1-3, it is characterised in that: the elastic component (4) is spring,
The both ends of the spring is respectively held against piston (201) and valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820399333.XU CN208294884U (en) | 2018-03-23 | 2018-03-23 | A kind of unidirectional speed-limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820399333.XU CN208294884U (en) | 2018-03-23 | 2018-03-23 | A kind of unidirectional speed-limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208294884U true CN208294884U (en) | 2018-12-28 |
Family
ID=64694583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820399333.XU Withdrawn - After Issue CN208294884U (en) | 2018-03-23 | 2018-03-23 | A kind of unidirectional speed-limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208294884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443269A (en) * | 2018-03-23 | 2018-08-24 | 浙江迦南科技股份有限公司 | A kind of unidirectional speed-limiting device |
-
2018
- 2018-03-23 CN CN201820399333.XU patent/CN208294884U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443269A (en) * | 2018-03-23 | 2018-08-24 | 浙江迦南科技股份有限公司 | A kind of unidirectional speed-limiting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181228 Effective date of abandoning: 20230728 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181228 Effective date of abandoning: 20230728 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |