CN109899571A - Safety valve of telescopic cylinder - Google Patents
Safety valve of telescopic cylinder Download PDFInfo
- Publication number
- CN109899571A CN109899571A CN201711291517.0A CN201711291517A CN109899571A CN 109899571 A CN109899571 A CN 109899571A CN 201711291517 A CN201711291517 A CN 201711291517A CN 109899571 A CN109899571 A CN 109899571A
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- vent plug
- air inlet
- valve pocket
- telescopic cylinder
- inner cavity
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- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The invention discloses a kind of safety valve of telescopic cylinder, it is arranged in the installing port of telescopic cylinder bottom, including the safe valve pocket being fixed in installing port, safety valve is arranged with closing inner chamber, and the safe valve pocket front end is equipped with the air inlet for safe valve pocket inner cavity and telescopic cylinder inner cavity connection, its side wall or rear portion are equipped with the venthole for safe valve pocket inner cavity and external environment connection, vent plug is sliding combined in safe valve pocket inner cavity, the vent plug rear portion is equipped with for vent plug head to be pressed to the elastic component for blocking air inlet, the elastic force regulating device for adjusting elastic component elastic force is equipped with after the elastic component.The present invention is unable to control aeration quantity for cylinder charge and cylinder is made excessively to inflate the defect for causing cylinder to damage, and provides a kind of when cylinder interior gas is more than that certain pressure can discharge gas automatically, protection cylinder protects it from high pressure damage, reliable in action, the safety valve of telescopic cylinder that pressure adjustable, structure is simple, safety is good.
Description
Technical field
The present invention relates to a kind of safety device of telescopic cylinder more particularly to a kind of safety valve of telescopic cylinder.
Background technique
Telescopic cylinder is a kind of common lift arrangement for being widely used in many fields.In lighting technical field, stretch
Contracting cylinder is used in outdoor lighting lamp frequently as flexible lamp post, the night illumination of the large area of especially some interim open airs,
It often can be appreciated that operating personnel is propped lamps and lanterns by rise lamp stand to carry out according to operation.However, the rise of telescopic cylinder is to pass through
Electric air pump cylinder will constantly rise to cylinder charge one by one, but after cylinder is raised to the height of the limit, if electric air pump
Do not stop also inflating, it is possible to cause the sealing element of cylinder to damage, or gas be made and flies off damage lamps and lanterns, cause multi-stage cylinder it
Between disengaging, the lamp stand or cylinder to fly out even threaten the personal safety of operating personnel.
Summary of the invention
The technical problem to be solved in the present invention is that being unable to control aeration quantity for prior art cylinder charge makes cylinder
The defect for causing cylinder to damage excessively is inflated, is provided a kind of when cylinder interior gas is more than that certain pressure can discharge gas, energy automatically
Protection cylinder protects it from high pressure damage, reliable in action, the safety valve of telescopic cylinder that pressure adjustable, structure is simple, safety is good.
The technical solution adopted by the present invention to solve the technical problems is: a kind of safety valve of telescopic cylinder, telescopic cylinder bottom
Portion is provided with installing port, and the safety valve includes the safe valve pocket being fixed in installing port, and the safety valve is arranged with closing inner chamber,
And the safe valve pocket front end is equipped with and sets for safe valve pocket inner cavity and air inlet, side wall or the rear portion of telescopic cylinder inner cavity connection
There is the venthole for safety valve set inner cavity and external environment connection, is sliding combined with vent plug in safe valve pocket inner cavity, it is described
Vent plug rear portion is equipped with for vent plug head to be pressed to the elastic component for blocking air inlet, is equipped with after the elastic component for adjusting elasticity
The elastic force regulating device of part elastic force.
The air inlet hole shape and vent plug head shape cooperate, so that the complete gapless covering air inlet in vent plug head will be into
Stomata blocks.
The air inlet is circular hole, and the vent plug head is the arc surface body for the evagination that diameter is greater than air inlet bore dia,
Vent plug head is adjacent to air inlet bore edges and blocks air inlet.
It is equipped at the air inlet port and the consistent circle seal face of vent plug head shape cooperation, vent plug head and compression
Face blind-mate blocks air inlet.
The surface or vent plug head of the seal face are equipped with elastic compression pad.
The middle front part of safe sleeve side wall is arranged in the venthole, and the vent plug side wall is matched with safe valve pocket side walls
Close, and the position of venthole setting meets: when vent plug head compresses and blocks air inlet, vent plug side wall blocks venthole, in gas
When plug head leaves air inlet, vent plug side wall also leaves venthole simultaneously, so that air inlet and venthole connection.
The venthole is arranged on the rear portion or elastic force regulating device of safe sleeve side wall, and the vent plug is equipped with connection
The venthole of safe valve pocket inner cavity before and after vent plug.
The rear portion in the safe valve pocket internal chamber wall face is equipped with screw thread, and the elastic force regulating device is to be screwed onto safe valve pocket
The pipe regulating screw nut at chamber rear portion.
The installing port is stepped hole, and inner wall is equipped with first step, and the safe valve pocket outside wall surface also is provided with and first
The second step of step corresponding matching is equipped with the gasket in both sealings gap between the first step and second step.
A kind of safety valve of telescopic cylinder is provided with installing port in telescopic cylinder bottom, and the safety valve includes being fixed on installation
Safe valve pocket in mouthful, the safety valve is arranged with closing inner chamber, and the safe valve pocket front end is equipped in safe valve pocket
Air inlet, side wall or the rear portion of chamber and telescopic cylinder inner cavity connection are equipped with going out for safe valve pocket inner cavity and external environment connection
Stomata, is sliding combined with vent plug in safe valve pocket inner cavity, the vent plug rear portion be equipped with for by the press of vent plug head block into
The elastic component of stomata is equipped with the elastic force for adjusting elastic component elastic force and being screwed onto safe valve pocket inner cavity rear portion after the elastic component
Regulating device；It is equipped at the air inlet port and the consistent circle seal face of vent plug head shape cooperation, vent plug head compression
Air inlet is blocked on seal face；The middle front part of safe sleeve side wall, the vent plug side wall and peace is arranged in the venthole
Full valve covers sidewall shape cooperation unanimously, and the position of venthole setting meets: when vent plug compresses and blocks air inlet, vent plug side wall
Venthole is blocked, when vent plug opens air inlet, vent plug side wall also leaves venthole, air inlet and venthole connection simultaneously.
The present invention is by the way of being arranged safety valve in the installing port in telescopic cylinder bottom, come gas when solving excessively to inflate
Gas leakage in cylinder.Wherein the safe valve pocket in safety valve is fixed in installing port, and safe valve pocket front end is equipped with air inlet, air inlet
Hole is equipped with venthole for safe valve pocket inner cavity and telescopic cylinder inner cavity connection, safe sleeve side wall or rear portion, and venthole is used for
Safe valve pocket inner cavity and external environment connection.Air inlet is blocked by the vent plug being slidably matched in safe valve pocket inner cavity, resistance
The gas only worked normally in telescopic cylinder is released by safety valve.Vent plug is flat by elastic component to the closure pressure of air inlet
Weighing apparatus, wherein the gas pressure in cylinder once reaches upper safety limit, i.e., cylinder interior gas pressure is beyond elastic component in safety valve
Elastic force is blocked and is retreated on the vent plug head of air inlet position by the pressure of cylinder interior gas, and elastic component compression, safety valve is opened,
By air inlet on safety valve and venthole by gas leakage, when inner pressure of air cylinder is returned to upper safety limit hereinafter, i.e. cylinder
Interior pressure is less than elastic component elastic force, then vent plug travels forward under the effect of elastic component elastic force and blocks air inlet, and safety valve closes at this time
It closes.The elastic force regulating device for adjusting elastic component elastic force is equipped with after elastic component, which can adjust elastic component
Elastic force keeps it consistent with the upper safety limit cooperation of telescopic cylinder.The configuration of the present invention is simple, energy releasing pressure automatically are to protect gas
Cylinder protects it from high pressure damage, and safe pressure can be adjusted by pressure balance, and reliable in action considers without operator
Whether hyperinflation, safety elastic force regulating device that is good, and being arranged after elastic component, be adjusted adapt to different pressures requirement
Cylinder.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of closed state of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of safety valve open state of the embodiment of the present invention；
Fig. 3 is partial enlarged view at I in Fig. 2；
Fig. 4 is safety valve of embodiment of the present invention setting position view.
Specific embodiment
As shown in Fig. 1,2,4, a kind of safety valve of telescopic cylinder, setting is provided in installing port 011 in 01 bottom of telescopic cylinder,
Installing port 011 and 01 inner cavity connection of telescopic cylinder, the safety valve includes the safe valve pocket 02 being fixed in installing port 011, institute
Safe valve pocket 02 is stated equipped with closed safe valve pocket inner cavity 023, and 02 front end of safe valve pocket is equipped in safe valve pocket
Air inlet 021, side wall or the rear portion of chamber 023 and 01 inner cavity connection of telescopic cylinder are equipped with for safe valve pocket inner cavity 023 and the external world
The venthole 022 of environment connection, i.e. air inlet 021 can 01 inner cavity of connection telescopic cylinder and safe valve pocket inner cavity 023, venthole
022 can the safe valve pocket inner cavity 023 of connection and external environment.Vent plug 03, the gas are sliding combined in safe valve pocket inner cavity 023
It fills in 03 rear portion to be equipped with for 03 head of vent plug to be pressed to the elastic component 06 for blocking air inlet 021, is equipped with and uses after the elastic component 06
In the elastic force regulating device 05 for adjusting 06 elastic force of elastic component.Since vent plug 03 slides in safe valve pocket inner cavity 023, then vent plug 03
Side wall and safe 023 shape of valve pocket inner cavity cooperate and all without corner angle, Generally Recognized as safe valve pocket inner cavities 023,03 side wall of vent plug difference
For cylindrical shape or elliptic cylindrical shape, it is also possible to the curved surface of no corner angle, it is preferably cylindric.
As shown in Figure 1, 2, 3, the installing port 011 is stepped hole, and inner wall is equipped with first step 012, the safety valve
It covers 02 outside wall surface and also is provided with second step 024 with 012 corresponding matching of first step, the first step 012 and second step
The gasket 04 in both sealings gap is equipped between 024.Safe 02 outer wall front end of valve pocket is equipped with screw thread, with 011 wall surface of installing port
The screw thread of upper setting is spirally connected, and safety valve is fixed, other fixed forms can also be arranged in safety valve: welding, screw are fixed etc., are
Convenient disassembly is preferably using being spirally connected or screw fixes.
As shown in Figure 1, 2, 3, in order to which vent plug 03 can block air inlet 021, then 021 shape of air inlet and vent plug are required
03 head shape cooperation, so that the complete gapless covering air inlet 021 in 03 head of vent plug blocks air inlet 021.The air inlet
Hole 021 is preferably circular hole, and 03 head of vent plug is the arc surface body for the evagination that diameter is greater than 021 diameter of air inlet, vent plug 03
Head is adjacent to 021 edge of air inlet and blocks air inlet 021.In order to increase the contact on 03 head of vent plug with 021 hole wall of air inlet
Area is conducive to the reliability blocked, then hole wall is equipped with 03 head shape of vent plug with unification at 021 port of air inlet
The circle seal face 025 caused, refers to the end face and inner wall junction of air inlet 021 at 021 port of air inlet, 03 head of vent plug with
025 blind-mate of seal face blocks air inlet 021.Such as when 03 head of vent plug be arc surface when, seal face 025 be one circle with
The identical arc surface of 03 head arc surface radian of vent plug, when 03 head of vent plug is other shapes, which is similarly
The completely the same shape with 03 head of vent plug.To further increase sealing characteristics, the surface of the seal face 025 or vent plug 03
Portion is equipped with elastic compression pad 026, and elastic compression pad 026 can enable 03 head of vent plug to compress 021 hole wall of air inlet completely, blocks
Air inlet 021 keeps its air tight.Elastic compression pad 026 is pasted onto 025 surface of seal face, can be coated with 03 head of vent plug.Gas
It fills in 03 rear portion and extends finite place piece 031, moved radially for limiting elastic component 06, prevent from deviateing in safe valve pocket inner cavity 023
Center influences 03 reliable movement of vent plug.Locating part 031 in the present embodiment is the limited post in the setting of 03 posterior center of vent plug,
Elastic component 06, which is sleeved on limited post, to be limited it and moves radially.
There are two types of modes for the position of the venthole 022: one is ventholes 022 to be arranged in safe 02 side wall of valve pocket
Front, 03 side wall of vent plug is consistent with safe 02 sidewall shape of valve pocket, and the position that venthole 022 is arranged meets: in vent plug
When 03 head compresses closure air inlet 021,03 side wall of vent plug blocks venthole 022, leaves air inlet 021 on 03 head of vent plug
When, 03 side wall of vent plug also leaves venthole 022 simultaneously, so that air inlet 021 and 022 connection of venthole.When venthole 022 is arranged
In the middle front part of safe 02 side wall of valve pocket, then there are join with external environment between safe 02 outer wall of valve pocket and telescopic cylinder 01
Logical outlet passageway 013, satisfaction can release gas to external environment from venthole 022.
The another way of position is arranged in the venthole 022: the rear portion of safe 02 side wall of valve pocket is arranged in venthole 022
Or in elastic force regulating device 05, the vent plug 03 is equipped with the venthole (figure of the safe valve pocket inner cavity 023 of 03 front and back of connection vent plug
In be not shown), venthole is flowed through from the gas that air inlet 021 releases by venthole and is entered in the safe valve pocket at 03 rear portion of vent plug
Chamber 023, then released from venthole 022.
The elastic component 06 at 03 rear of vent plug is set, is to compress vent plug 03 by 06 elastic force of elastic component to block air inlet
021, elastic component 06 can be a variety of springy devices such as helical spring, elastic slice, and the present embodiment selects helical spring.
The middle and back of safe 023 wall surface of valve pocket inner cavity is equipped with screw thread, and the elastic force regulating device 05 is to be screwed onto peace
Full valve covers the pipe regulating screw nut at 023 rear portion of inner cavity, and pipe regulating screw nut presses the rear portion of elastic component 06, for keeping elastic component
06 elastic force centainly pre-tightened, so that elastic component 06 presses against air bag rear portion and compresses it closure air inlet 021.And elastic force is adjusted
Device 05 is that the position of pipe regulating screw nut in the cylinder is adjustable, and the bullet of elastic component 06 can be adjusted in rotating elastic regulating device 05
Power, for setting the elastic force under different pressures requirement.The elastic force pressure of helical spring meets Hooke's law (the F=k Δ x) of spring.
It inwardly tightens, elastic force is increasing, conversely, unscrewing outward, elastic force is fewer and fewer, and the safe pressure of cylinder can be according to specific need
It voluntarily to adjust.On the one hand the effect of pipe regulating screw nut is used for adjustment spring elastic force, be on the other hand for closing safety valve
Cover inner cavity 023.
When telescopic cylinder 01 works normally, safety valve is air tight.I.e. in the elastic force pressure of spring (for the air pressure safety of setting
Value) effect under, vent plug 03 blocks the air inlet 021 of safe valve pocket 02, prevents gas from draining outward, when in telescopic cylinder 01
When air pressure is greater than the elastic force pressure of spring, vent plug 03 to moving down, get through by gas circuit, and the gas in telescopic cylinder 01 can be smoothly to outlet
It lets out, after gas leak, the air pressure in telescopic cylinder 01 is reduced, and when air pressure is less than the elastic force pressure of spring, vent plug 03 is in elastic force pressure
Under the action of, the air inlet 021 of safe valve pocket 02 is blocked automatically, stops losing heart.
Claims (10)
1. a kind of safety valve of telescopic cylinder is arranged in the installing port that telescopic cylinder bottom is provided with, which is characterized in that including fixation
Safe valve pocket in installing port, the safety valve is arranged with closing inner chamber, and the safe valve pocket front end is equipped with for safety
The air inlet of valve pocket inner cavity and telescopic cylinder inner cavity connection, side wall or rear portion, which are equipped with, is used for safe valve pocket inner cavity and external environment
The venthole of connection, is sliding combined with vent plug in safe valve pocket inner cavity, and the vent plug rear portion is equipped with for pushing up vent plug head
Press seal blocks up the elastic component of air inlet, and the elastic force regulating device for adjusting elastic component elastic force is equipped with after the elastic component.
2. safety valve of telescopic cylinder according to claim 1, which is characterized in that the air inlet hole shape and vent plug head shape
Shape cooperation, so that the complete gapless covering air inlet in vent plug head blocks air inlet.
3. safety valve of telescopic cylinder according to claim 2, which is characterized in that the air inlet is circular hole, the vent plug
Head is the arc surface body for the evagination that diameter is greater than air inlet bore dia, and vent plug head is adjacent to air inlet bore edges and seals air inlet
It is stifled.
4. safety valve of telescopic cylinder according to claim 2, which is characterized in that be equipped at the air inlet port and vent plug
The consistent circle seal face of head shape cooperation, vent plug head blocks air inlet with seal face blind-mate.
5. safety valve of telescopic cylinder according to claim 4, which is characterized in that the surface or vent plug head of the seal face
Equipped with elastic compression pad.
6. safety valve of telescopic cylinder described in -5 any one according to claim 1, which is characterized in that the venthole setting exists
The middle front part of safe sleeve side wall, the vent plug side wall and safe valve pocket snug engagement, and the position of venthole setting is full
Foot: when vent plug head compresses and blocks air inlet, vent plug side wall blocks venthole, when air inlet is left on vent plug head, vent plug
Side wall also leaves venthole simultaneously, so that air inlet and venthole connection.
7. safety valve of telescopic cylinder described in -5 any one according to claim 1, which is characterized in that the venthole setting exists
On the rear portion of safe sleeve side wall or elastic force regulating device, the vent plug is equipped with the safe valve pocket inner cavity before and after connection vent plug
Venthole.
8. safety valve of telescopic cylinder described in -5 any one according to claim 1, which is characterized in that the safe valve pocket inner cavity
The rear portion of wall surface is equipped with screw thread, and the elastic force regulating device is the pipe regulating screw nut for being screwed onto safe valve pocket inner cavity rear portion.
9. safety valve of telescopic cylinder described in -5 any one according to claim 1, which is characterized in that the installing port is ladder
Hole, inner wall are equipped with first step, and the safe valve pocket outside wall surface also is provided with the second step with first step corresponding matching, institute
State the gasket that both sealings gap is equipped between first step and second step.
10. a kind of safety valve of telescopic cylinder is arranged in the installing port that telescopic cylinder bottom is provided with, which is characterized in that including solid
The safe valve pocket being scheduled in installing port, the safety valve is arranged with closing inner chamber, and the safe valve pocket front end is equipped with for pacifying
Full valve covers inner cavity and air inlet, side wall or the rear portion of telescopic cylinder inner cavity connection and is equipped with for safe valve pocket inner cavity and external environment
The venthole of connection, is sliding combined with vent plug in safe valve pocket inner cavity, and the vent plug rear portion is equipped with for pushing up vent plug head
Press seal blocks up the elastic component of air inlet, after being equipped with after the elastic component for adjusting elastic component elastic force and being screwed onto safe valve pocket inner cavity
The elastic force regulating device in portion；It is equipped at the air inlet port and the consistent circle seal face of vent plug head shape cooperation, vent plug
Head is pressed on seal face and blocks air inlet；The middle front part of safe sleeve side wall, and venthole is arranged in the venthole
The position of setting meets: when vent plug compresses and blocks air inlet, vent plug side wall blocks venthole, when vent plug opens air inlet,
Vent plug side wall also leaves venthole, air inlet and venthole connection simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711291517.0A CN109899571A (en) | 2017-12-07 | 2017-12-07 | Safety valve of telescopic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711291517.0A CN109899571A (en) | 2017-12-07 | 2017-12-07 | Safety valve of telescopic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109899571A true CN109899571A (en) | 2019-06-18 |
Family
ID=66940067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711291517.0A Pending CN109899571A (en) | 2017-12-07 | 2017-12-07 | Safety valve of telescopic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109899571A (en) |
-
2017
- 2017-12-07 CN CN201711291517.0A patent/CN109899571A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190618 |
|
| WD01 | Invention patent application deemed withdrawn after publication |