CN205534430U - Explosion -proof valve of current -limiting - Google Patents
Explosion -proof valve of current -limiting Download PDFInfo
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- CN205534430U CN205534430U CN201620188599.0U CN201620188599U CN205534430U CN 205534430 U CN205534430 U CN 205534430U CN 201620188599 U CN201620188599 U CN 201620188599U CN 205534430 U CN205534430 U CN 205534430U
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Abstract
The utility model relates to an explosion -proof valve of current -limiting bursts and results in in the hydraulic cylinder hydraulic oil not leak resulting in the problem of incident not controlledly for solving present hydro -cylinder connecting line, the utility model discloses an explosion -proof valve of current -limiting constructs, which comprises the following components: a valve body, it is poroid that valve pocket in the valve body is the ladder, it includes consecutive for a short time, in, greatly, the valve pocket of three kinds of diameters, establish poppet spring at well diameter valve pocket, establish the case in the major diameter valve pocket, poppet spring one end is connected with the circular bead contact of minor diameter valve pocket and well diameter valve pocket adjoiner, the other end is connected with the case contact in extending to the major diameter valve pocket, the major diameter valve pocket is established radial work and is led to the hydraulic fluid port, establish the orifice that link up the case on the case, remove diameter valve pocket and major diameter valve pocket during the orifice on the case communicates during the circular bead contact located with this of the tip of diameter valve pocket in bordering on to the major diameter valve pocket when the case. When the emergence connecting line bursts, can ensure that the hydraulic oil in the hydraulic cylinder slowly flows, ensure goods and operator's safety.
Description
Technical field
This utility model relates to a kind of hydraulic valve, more particularly, it relates to a kind of flow-limited explosion-resistant valve.
Background technology
The hydraulic tests such as fork truck, crane, aerial work platform utilize hydraulic jack goods or platform to be elevated.At present, domestic
The equipment such as normally used work high above the ground hydraulic elevating platform, fork truck usually not install flow-limited explosion-resistant valve, and only with double
Carrying out hydraulic control to electromagnetic valve or use check valve, its shortcoming is: when using bidirectional electromagnetic valve or check valve, in case of
To hydraulic elevating platform hydraulic oil pipe cracking during rising, under oil cylinder load action of gravity, oil cylinder is converted into can not
Governor pressure source, internal fluid will flow out rapidly, and pallet fork or platform will decline at a high speed.In the case of being fitted without pipeline explosion-proof valve,
Actual pallet fork maximum falling speed will be much larger than normal operation standard-required, and pallet fork declines too fast, not only causes goods on fork truck
Damage, more threaten operator and Active workings safety.Owing to having longer oil pipe line between control valve and hydraulic cylinder, it is easy
In mechanical wear or aging and burst, now control valve does not has safeguard protection effect, is easily caused hoistable platform dramatic decrease,
Cause potential safety hazard.
Utility model content
The technical problems to be solved in the utility model be the explosion of oil cylinder connecting line and in causing hydraulic jack hydraulic oil uncontrolled extraterrestrial
Let out the problem causing security incident, and a kind of flow-limited explosion-resistant valve being connected on hydraulic jack is provided.
This utility model is that the technical scheme realizing its purpose is such that constructing a kind of flow-limited explosion-resistant valve, and including valve body, it is special
Levying the valve pocket being to be provided with connection valve body two ends in valve body, described valve pocket is that ladder is poroid, it include being sequentially connected little directly
Footpath valve pocket, middle diameter valve pocket, major diameter valve pocket, arrange valve core spring at middle diameter valve pocket, be provided with at large-diameter valve intracavity
The spool that major diameter valve pocket slides, one end of described valve core spring contacts with the shoulder of minor diameter valve pocket and middle diameter valve pocket adjoiner
Connecting, the other end extends to described large-diameter valve intracavity and contacts connection with described spool, and the cavity wall of described major diameter valve pocket is provided with
Radially the logical hydraulic fluid port of work, described spool is provided with the throttle orifice of through spool, when described spool moves to major diameter valve pocket adjacent
When the middle end of diameter valve pocket contacts with the shoulder at this, the throttle orifice on described spool connects described middle diameter valve pocket and large-diameter valve
Chamber.This utility model flow-limited explosion-resistant valve may be installed on hydraulic jack, and wherein major diameter valve pocket end is connected with hydraulic jack, little directly
Footpath valve pocket end is for being connected with pipeline, when the hydraulic oil in hydraulic jack passes in and out under the control of a control valve, in hydraulic jack
The hydraulic oil flowed out from the radial direction valve body work logical hydraulic fluid port enter major diameter valve pocket, again through in after diameter valve pocket, minor diameter valve pocket
Entering connecting line, if there is connecting line explosion, then the big flow in the uncontrolled ground of the hydraulic oil in hydraulic jack flows through on valve body
After radially the logical hydraulic fluid port of work enters major diameter valve pocket, the most therefrom diameter valve pocket, minor diameter valve pocket flow out, and big flow is in the both sides of spool
Producing pressure reduction, this pressure reduction promotes spool to overcome the elastic force of valve core spring to move, when spool moves to major diameter valve pocket and middle diameter
Valve pocket adjoiner contacts with the shoulder at this, and now major diameter valve pocket can only be connected by the throttle orifice on spool with middle diameter valve pocket,
Hydraulic oil in hydraulic jack can only be flowed out by throttle orifice, due to the damping metering function of throttle orifice so that hydraulic jack can only
Bounce back lentamente, thus there is connecting line explosion when, guarantee the safety of operator and goods.In this utility model current limliting
In explosion-proof valve, minor diameter, middle diameter, major diameter are only minor diameter valve pocket, middle diameter valve pocket, major diameter valve pocket three's diameter phase
To comparatively, do not specify certain numerical range, the diameter of valve pocket requires to be designed according to properties of product.
In above-mentioned flow-limited explosion-resistant valve, described valve body is provided with and limits the stopping means that described spool comes off from described major diameter valve pocket.
This stopping means is provided in the snap ring of described large-diameter valve intracavity.This stopping means can also is that and is threaded in described valve body end
The cap in portion, the middle part of described cap is provided with the hole of described major diameter valve pocket Yu ft connection.
In above-mentioned flow-limited explosion-resistant valve, the outer circumference surface of valve body is stepped, and the valve body external diameter at described major diameter valve pocket is straight in being less than
Valve body external diameter at the valve pocket of footpath.After flow-limited explosion-resistant valve is arranged on hydraulic jack, the valve body at described major diameter valve pocket and hydraulic oil
Gap between cylinder just constitutes the oil duct between flow-limited explosion-resistant valve and hydraulic oil oil cylinder.
In above-mentioned flow-limited explosion-resistant valve, the valve body external diameter at described minor diameter valve pocket is more than the valve body external diameter at described middle diameter valve pocket.
Valve body outer circumference surface at described minor diameter valve pocket is provided with the screw thread for installing valve body.The valve body of flow-limited explosion-resistant valve is by this spiral shell
Stricture of vagina is threadeded with hydraulic jack.
In above-mentioned flow-limited explosion-resistant valve, the valve body outer circumference surface at described minor diameter valve pocket and the valve body outer circumference surface at major diameter valve pocket
Adjoiner be provided with sealing ring.
This practicality flow-limited explosion-resistant valve is connected on hydraulic jack, when connecting line explosion occurs, it can be ensured that in hydraulic jack
Hydraulic oil slowly flows out, and ensures that the goods lifted by hydraulic jack or platform decline with the speed of slowly safety, it is ensured that goods
Thing and the safety of operator.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model flow-limited explosion-resistant valve.
Parts title and sequence number in figure:
Valve body 1, sealing ring 2, valve core spring 3, spool 4, snap ring 5, throttle orifice 6, radially work logical hydraulic fluid port 7, working oil
Mouth 8, screw thread 9, minor diameter valve pocket 10, middle diameter valve pocket 11, major diameter valve pocket 12.
Detailed description of the invention
Specific embodiments is described below in conjunction with the accompanying drawings.
As it is shown in figure 1, flow-limited explosion-resistant valve includes valve body 1, the most in a tubular form, it is internally provided with valve pocket, valve pocket to valve body 1
One end connection actuator port 8, when flow-limited explosion-resistant valve is connected with connecting line this actuator port with manage connect, for hydraulic oil
Turnover.Valve pocket is stepped, is followed successively by minor diameter valve pocket 10, middle diameter valve pocket 11, large-diameter valve from actuator port 8 end
Chamber 12, arranges valve core spring in middle diameter valve pocket 11, is provided with the valve slided at major diameter valve pocket in major diameter valve pocket 12
Core 4, one end of valve core spring 3 contacts connection, the other end with the shoulder of minor diameter valve pocket 10 and middle diameter valve pocket 11 adjoiner
Contacting connection with spool 5 in extending to major diameter valve pocket 12, hydraulic fluid port 7, valve are led in the radially work that is provided with of major diameter valve pocket 12
The throttle orifice 6 of through spool it is provided with, when spool 4 moves the end to the adjacent middle diameter valve pocket 11 of major diameter valve pocket 12 on core 4
When portion contacts with the shoulder at this, during spool 4 is closed, diameter valve pocket 11 leads to the runner area of passage at hydraulic fluid port 7 to radially work,
Diameter valve pocket 11 and major diameter valve pocket 12 in only being connected by the throttle orifice on spool 4, it is achieved current limliting.
In order to prevent spool 4 from coming off in major diameter valve pocket 12, valve body 1 is provided with restriction spool 4 and comes off from major diameter valve pocket
Stopping means.This stopping means is provided in the snap ring 5 in major diameter valve pocket 12.In the specific implementation, this stopping means is also
Can be the cap being threaded in valve body 1 end, the middle part of cap be provided with the hole of major diameter valve pocket Yu ft connection.
The outer circumference surface of valve body 1 is stepped, and the valve body external diameter at major diameter valve pocket 12 is less than the valve body at middle diameter valve pocket 11
External diameter.After flow-limited explosion-resistant valve is arranged on hydraulic jack, the gap between valve body and hydraulic jack at major diameter valve pocket 12 is with regard to structure
Become the oil duct between flow-limited explosion-resistant valve and hydraulic oil oil cylinder.Valve body external diameter at minor diameter valve pocket is more than the valve body at middle diameter valve pocket
External diameter.Valve body outer circumference surface at minor diameter valve pocket is provided with the screw thread for installing valve body.The valve body of flow-limited explosion-resistant valve is by being somebody's turn to do
Screw thread is threadeded with hydraulic jack.Valve body outer circumference surface at valve body outer circumference surface at minor diameter valve pocket and major diameter valve pocket
Adjoiner is provided with sealing ring.
This utility model flow-limited explosion-resistant valve may be installed on hydraulic jack, and the major diameter valve pocket end of valve body is connected with hydraulic jack, little
Diameter valve pocket end is for being connected with pipeline, when the hydraulic oil in hydraulic jack passes in and out under the control of a control valve, from hydraulic jack
The hydraulic oil of the interior outflow radial direction logical hydraulic fluid port 7 of work from valve body enter major diameter valve pocket 12, again through in diameter valve pocket 11, little directly
Connecting line is entered after footpath valve pocket 10, if there is connecting line explosion, then the big traffic flow in the uncontrolled ground of the hydraulic oil in hydraulic jack
After the logical hydraulic fluid port 7 of radial direction work on valve body enters major diameter valve pocket 12, the most therefrom diameter valve pocket 11, minor diameter valve pocket 10 flow out,
Big flow produces pressure reduction in the both sides of spool 4, and this pressure reduction promotes spool 4 to overcome the elastic force of valve core spring 3 to move, and works as spool
4 move to major diameter valve pocket 12 and contact with the shoulder at this with middle diameter valve pocket 11 adjoiner, now major diameter valve pocket 12 and in
Diameter valve pocket 11 can only be connected by the throttle orifice on spool 4, and the hydraulic oil in hydraulic jack can only be flowed out by throttle orifice 6,
Damping metering function due to throttle orifice 6 so that hydraulic jack can only bounce back lentamente, thus there is connecting line explosion
Time guarantee the safety of operator and goods.
Flow-limited explosion-resistant valve in the present embodiment is connected on hydraulic jack, when connecting line explosion occurs, it can be ensured that hydraulic oil
Hydraulic oil in cylinder slowly flows out, and ensures that the goods lifted by hydraulic jack or platform decline with the speed of slowly safety,
Guarantee the safety of goods and operator.
Claims (8)
1. a flow-limited explosion-resistant valve, including valve body, it is characterised in that be provided with the valve pocket at connection valve body two ends in valve body,
Described valve pocket is that ladder is poroid, and it includes the minor diameter valve pocket being sequentially connected, middle diameter valve pocket, major diameter valve pocket, in straight
Footpath valve pocket arranges valve core spring, is provided with the spool slided at major diameter valve pocket at large-diameter valve intracavity, described valve core spring
One end contacts connection with the shoulder of minor diameter valve pocket and middle diameter valve pocket adjoiner, and the other end extends to described large-diameter valve intracavity
Contact connection with described spool, the cavity wall of described major diameter valve pocket is provided with the logical hydraulic fluid port of radially work, and described spool is provided with
The throttle orifice of through spool, when described spool move to major diameter valve pocket in adjacent the end of diameter valve pocket with this at shoulder connect
When touching, the throttle orifice on described spool connects described middle diameter valve pocket and major diameter valve pocket.
Flow-limited explosion-resistant valve the most according to claim 1, it is characterised in that be provided with the described spool of restriction on described valve body
The stopping means come off from described major diameter valve pocket.
Flow-limited explosion-resistant valve the most according to claim 2, it is characterised in that stopping means is provided in described large-diameter valve
The snap ring of intracavity.
Flow-limited explosion-resistant valve the most according to claim 2, it is characterised in that described stopping means be threaded in described
The cap of valve end, the middle part of described cap is provided with the hole of described major diameter valve pocket Yu ft connection.
Flow-limited explosion-resistant valve the most according to claim 1, it is characterised in that the outer circumference surface of described valve body is stepped,
Valve body external diameter at described major diameter valve pocket is less than the valve body external diameter at middle diameter valve pocket.
Flow-limited explosion-resistant valve the most according to claim 5, it is characterised in that the valve body external diameter at described minor diameter valve pocket is big
Valve body external diameter at described middle diameter valve pocket.
Flow-limited explosion-resistant valve the most according to claim 6, it is characterised in that the valve body excircle at described minor diameter valve pocket
Face is provided with the screw thread for installing valve body.
Flow-limited explosion-resistant valve the most according to claim 1, it is characterised in that the valve body excircle at described minor diameter valve pocket
The adjoiner of the valve body outer circumference surface at face and major diameter valve pocket is provided with sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620188599.0U CN205534430U (en) | 2016-03-11 | 2016-03-11 | Explosion -proof valve of current -limiting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620188599.0U CN205534430U (en) | 2016-03-11 | 2016-03-11 | Explosion -proof valve of current -limiting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205534430U true CN205534430U (en) | 2016-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620188599.0U Active CN205534430U (en) | 2016-03-11 | 2016-03-11 | Explosion -proof valve of current -limiting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205534430U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679276A (en) * | 2016-12-05 | 2018-10-19 | 陈博思 | A kind of pneumatic control valve |
-
2016
- 2016-03-11 CN CN201620188599.0U patent/CN205534430U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679276A (en) * | 2016-12-05 | 2018-10-19 | 陈博思 | A kind of pneumatic control valve |
| CN108679276B (en) * | 2016-12-05 | 2019-07-09 | 陈博思 | A kind of pneumatic control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230403 Address after: 545000 No. 6, Yangtai Road, Yanghe industrial new area, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Zhongyuan Machinery Co.,Ltd. Patentee after: GUANGXI LIUGONG MACHINERY Co.,Ltd. Address before: 545006 Yanghe North Road, Yanghe Industrial Zone, Liuzhou, the Guangxi Zhuang Autonomous Region, B-14-1 Patentee before: LIUZHOU LIUGONG HYDRAULIC COMPONENTS Co.,Ltd. Patentee before: GUANGXI LIUGONG MACHINERY Co.,Ltd. |