CN204003730U - Air way switch valve - Google Patents
Air way switch valve Download PDFInfo
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- CN204003730U CN204003730U CN201420444684.XU CN201420444684U CN204003730U CN 204003730 U CN204003730 U CN 204003730U CN 201420444684 U CN201420444684 U CN 201420444684U CN 204003730 U CN204003730 U CN 204003730U
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Abstract
The utility model relates to a kind of air way switch valve, and it comprises valve body; In described valve body, be provided with valve pocket, valve rod and spool; Described valve pocket comprises brake chamber, confession air cavity, outlet chamber and the exhaust cavity of connection successively and axis conllinear; Described valve rod is arranged in valve pocket, and its one end fixed cover that is positioned at exhaust cavity is provided with a sealing seat, is installed with the second sealing skin and claps on sealing seat; Described spool fixed cover is located at valve rod periphery, and its one end is embedded with the first sealing skin of a port between air feed chamber and outlet chamber and claps; By brake chamber with for the draught head actuate valve stem forming between air cavity, control described the first sealing skin bat control for the break-make between air cavity and outlet chamber, and drive described the second sealing skin to clap the break-make between control outlet chamber and exhaust cavity simultaneously.The utility model, by utilizing pressure reduction to switch the gas circuit of air way switch valve, has been realized braking and has resetted, and reduces such environmental effects, has extended working life, has reduced maintenance intensity.
Description
Technical field
The utility model belongs to the control components and parts of pneumatics automatic field, relate in particular to a kind of be applied in brake air dynamic component field, main by draught head the air way switch valve as brake power.
Background technique
Pneumatic Transmission and control technique are called for short pneumatics, and it be take pressurized air and carries out the transmission of energy and signal as working medium, realizes a special kind of skill of production process mechanization, automation.Pneumatics is an important component part of Fluid Transmission and Control subject.Because pneumatics has advantages of many outstandingly for mechanical transmission, electric transmission and hydraulic transmission, pneumatics is widely used in the fields such as machinery, metallurgy, weaving, food, chemical industry, railway locomotive, space flight and aviation, national defense construction.
But, some field is very strict to the requirement of pneumatic element, for example: in railway locomotive, often application air way switch valve brakes, once air way switch valve breaks down, cannot guarantee that railway locomotive can stop and stop in time, cause occurring derailment occurring, life is caused safely to serious threat, therefore,, for guaranteeing that railway locomotive can Quick brake and guarantee passenger and the safety of driver, the quality requirement of air way switch valve and action effect are particularly important.And existing air way switch valve general using pressure air Compress Spring stored energy, spring releases energy when extending or compressing, thereby be applied to and on truck brake rigging device, be converted into stopping brake power, realize the parking of locomotive, but because spring is under different working environments, its elasticity and working life can be subject to different impacts, the poor-performing of the spring of especially working under the environment of severe cold, easily causes the locomotive cannot normal braking; And, when releasing energy, spring needs the regular hour, and so just make brake produce certain time delay.Therefore, this braking while only relying on spring energy-storage formula to stop exists larger potential safety hazard, and service work intensity is large.
Model utility content
The purpose of this utility model is in order to solve the shortcoming and defect of above-mentioned prior art, provides a kind of draught head that utilizes realize braking and reset, and reduces such environmental effects, long service life, the air way switch valve of reduction maintenance intensity.
The utility model is achieved through the following technical solutions: a kind of air way switch valve, comprises valve body; In described valve body, be provided with valve pocket, valve rod and spool; Described valve pocket comprises brake chamber, confession air cavity, outlet chamber and the exhaust cavity of connection successively and axis conllinear; Described brake chamber side is provided with a brake interface being communicated with it; The described air cavity side that supplies is provided with an air feed interface being communicated with it; Described outlet chamber side is provided with an interface of giving vent to anger being communicated with it, and the internal diameter of outlet chamber is less than the internal diameter for air cavity and exhaust cavity; Described exhaust cavity side is provided with an exhaust port being communicated with it;
Described valve rod is arranged in valve pocket, and its one end is arranged in brake chamber, and the other end is arranged in exhaust cavity, and its axis and brake chamber axis conllinear; And one end fixed cover that described valve rod is positioned at exhaust cavity is provided with a sealing seat, the second sealing skin that is installed with a port between outlet chamber and exhaust cavity on sealing seat is clapped;
Described valve core axis and valve rod axis conllinear, and fixed cover is located at valve rod periphery, its one end is peripheral to be tightly connected with brake chamber internal face, and the other end end face is embedded with the first sealing skin of a port between air feed chamber and outlet chamber and claps;
Described valve rod drives described the first sealing skin to clap the break-make of controlling between air cavity and outlet chamber, and drives described the second sealing skin to clap the break-make of controlling between outlet chamber and exhaust cavity simultaneously.
By to brake interface and air feed interface, when braking, respectively it is accessed to different pressure reduction, make brake chamber and form enough pressure reduction for air cavity, actuate valve stem moves toward exhaust cavity, seals up for the port between air cavity and outlet chamber, and drive the second sealing skin beating to output the port between air cavity and exhaust cavity simultaneously, realization is pushed to outlet chamber and exhaust cavity by the gas of brake chamber, and the gas of outlet chamber is pushed out into the interface of giving vent to anger, and enters into outside braking brake pipeline; When resetting, brake interface is stopped accessing gas, air feed interface keeps access gas, utilize for the pressure difference promotion valve rod forming between air cavity and brake chamber and push back toward brake chamber, valve rod drives the first sealing skin to pat and opens sealing for the port between air cavity and outlet chamber, and drive the second sealing skin to clap the port between sealing outlet chamber and exhaust cavity simultaneously, realize and resetting.Therefore, by said structure, utilize pressure reduction to switch the gas circuit of air way switch valve, realized braking and resetted, reduce such environmental effects, extended working life, reduced maintenance intensity.
Large 0.5 times～1.5 times of the area of the described Area Ratio brake chamber for air cavity.If air pressure pressure is P, on the face that air pressure pressure action is S at an area, the power that air pressure pressure produces at this face is F, P, S and F meet formula F=P/S, as shown from the above formula, and when air pressure pressure P mono-timing, area S is less, and the suffered directed force F of this face is just larger; Therefore due to large 0.5 times～1.5 times of the area for the Area Ratio brake chamber of air cavity, to for air cavity when being filled with the same gas of pressure in brake chamber, the thrust that valve rod is subject in brake chamber than valve rod large 0.5 times～1.5 times of the active force for suffered in air cavity, easily valve rod is pushed toward outlet chamber, realize rapid braking, and further guaranteed normally carrying out of air way switch valve braking work.
Port between described outlet chamber and confession air cavity is a frustoconic shape import, and the port between outlet chamber and exhaust cavity is a frustoconic shape outlet; Described the first sealing skin is the round table surface coordinating with frustoconic shape import towards the periphery, one end of frustoconic shape import in clapping, and described the second sealing skin is the round table surface coordinating with frustoconic shape import towards the periphery, one end of frustoconic shape outlet in clapping.The structure that sealing surface herein coordinates, substituted existing tip strikes formula sealing, by port, be set to frustoconic shape mouth, and the periphery, one end that seals port in the bat of sealing skin is set to the round table surface coordinating with frustoconic shape mouth, increased the area of contact between the bat of sealing skin and port, the impact producing during to sealing has stronger buffer function, impulse force has obtained dispersion, effectively avoided the sealing configuration of prior art because impulse force is excessive, to cause the Rapid Damage of port and Sealing, not only extend the working life that sealing skin is clapped, and effectively strengthened sealing.
The periphery, one end being tightly connected with brake chamber internal face in described spool offers the circular groove of at least one axis and valve core axis's conllinear, is provided with the y-shaped ring that disconnected cross section structure is Y shape in described circular groove.By y-shaped ring, be also that seal ring one end is the V-shaped part flicking, its elasticity is restorative good, when spool and brake chamber internal face generation relative movement, it is restorative that y-shaped ring has good elasticity, be not subject to friction and damage good seal performance, long service life.
Described valve body opposite end end is respectively equipped with left end cap and right end cap; Described left end cap is by the one end at brake chamber place at least one seal with O ring valve body; Described right end cap is by the one end at exhaust cavity place at least one seal with O ring valve body.Be provided with herein and be beneficial to the sealing of strengthening valve body, and the installation, replacing and the maintenance that have facilitated all parts in valve body.
The utility model also comprises a spring, and the end, one end being arranged in described right end cap in exhaust cavity offers a locating slot; Described spring one end is fixedly connected on the end of sealing seat, and the other end is installed in locating slot.By spring, further accelerated to promote the reset of valve rod, and the stability that valve rod is resetted improves greatly.
The structure of described spool is boss shape.Be provided with to be beneficial to reduce herein and manufacture raw material, and spool can be moved at brake chamber with in air cavity with valve rod better, the installation that has also facilitated the first sealing skin to clap simultaneously.
Described brake interface, air feed interface, give vent to anger interface and exhaust port periphery are arranged with respectively one for strengthening the O shape circle of interface and external pipeline connection sealing.The joint effectively having prevented because of brake interface, air feed interface, give vent to anger interface and exhaust port and exterior line is set herein gas leak phenomenon occurs, strengthened the sealing of joint, guaranteed brake chamber, for thering is gas in air cavity and outlet chamber, can not leak outside, further guaranteed that air way switch valve can normally stably work.
In order to understand better and to implement, below in conjunction with accompanying drawing, describe the utility model in detail.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of air way switch valve of the present utility model;
Fig. 2 is the sectional structure schematic diagram of air way switch valve of the present utility model.
Embodiment
Please refer to Fig. 1 and Fig. 2, air way switch valve of the present utility model is a kind of two-position three way air way switch valve, and it comprises valve body 1; In described valve body 1, be provided with valve pocket, valve rod 3 and spool 4.
Described valve pocket comprises brake chamber 11, confession air cavity 12, outlet chamber 13 and the exhaust cavity 14 of connection successively and axis conllinear.Described brake chamber 11 sides are provided with a brake interface P1 who is communicated with it; Described air cavity 12 sides that supply are provided with an air feed interface P2 who is communicated with it; Described outlet chamber 13 sides are provided with an interface P3 that gives vent to anger being communicated with it, and the internal diameter of outlet chamber 13 is less than the internal diameter for air cavity 12 and exhaust cavity 14; Described exhaust cavity 14 sides are provided with an exhaust port P4 who is communicated with it.Can be according to the needs of Environmental Conditions, in order to facilitate being connected of air way switch valve and exterior line, brake interface P1, air feed interface P2, give vent to anger interface P3 and exhaust port P4 can be arranged on the same side in valve body 1; Or brake interface P1, air feed interface P2, the interface P3 that gives vent to anger are arranged on the same side in valve body 1, exhaust port P4 is arranged on other side of valve body 1; Or brake interface P1, give vent to anger interface P3 and exhaust port P4 are arranged on the same side in valve body 1, air feed interface P2 is arranged on other side of valve body 1 etc.In order to strengthen the connection sealing of brake interface P1, air feed interface P2 and give vent to anger interface P3 and exterior line, further assurance air way switch valve can normally stably be worked, as a kind of more excellent technological scheme, described brake interface P1, air feed interface P2, give vent to anger interface P3 and exhaust port P4 periphery are arranged with respectively one for strengthening the O shape circle (A1, A2, A3 and A4) of interface and external pipeline connection sealing.
Described valve body 1 opposite end end is respectively equipped with left end cap 21 and right end cap 22; Described left end cap 21 is by the one end at brake chamber 11 places at least one seal with O ring valve body 1; Described right end cap 22 is by the one end at exhaust cavity 14 places at least one seal with O ring valve body 1.In the present embodiment, described left end cap 21 peripheries are evenly provided with the circular groove of two axis and its axis conllinear, in two circular grooves on left end cap 21, be separately installed with O type circle A5 and A6, left end cap 21 is by the one end at brake chamber 11 places in two seal with O ring valve bodies 1; Described right end cap 22 peripheries are evenly provided with the circular groove of two axis and its axis conllinear, in two circular grooves on right end cap 22, are separately installed with O type circle A7 and A8, and right end cap 22 is by the one end at exhaust cavity 14 places in two seal with O ring valve bodies 1.
Described valve rod 3 is arranged in valve pocket, and its one end is arranged in brake chamber 11, and the other end is arranged in exhaust cavity 14, and its axis and brake chamber 11 axis conllinear; And one end fixed cover that described valve rod 3 is positioned at exhaust cavity 14 is provided with a sealing seat 7, the the second sealing skin that is installed with a port between outlet chamber 13 and exhaust cavity 14 on sealing seat 7 claps 6, and described the second sealing skin is clapped 6 and driven it to control the break-make between outlet chamber 13 and exhaust cavity 14 by valve rod 3.For further enhanced leaktightness seat 7 is arranged on the steadiness on valve rod 3, and sealing seat 7 claps with sealing skin the steadiness being connected, as a kind of more excellent technological scheme, outside one end of described valve rod 3, be arranged with a bump 31, and valve rod 3 these ends be threaded one with the hex screw 32 of its axis conllinear, described bump 31 and sealing seat 7 laminatings, described hex screw 32 claps 6 through sealing seat 7 and the second sealing skin successively, and be threaded with valve rod 3, sealing seat 7 and the second sealing skin bat 6 are fastened between bump 31 and hex screw 32.
Described spool 4 axis and valve rod 3 axis conllinear, and fixed cover is located at valve rod 3 peripheries, its one end is peripheral to be tightly connected with brake chamber 11 internal faces, the other end end face is embedded with the first sealing skin of a port between air feed chamber 12 and outlet chamber 13 and claps 5, and described the first sealing skin is clapped 5 and driven it to control for the break-make between air cavity 12 and outlet chamber 13 by valve rod 3.In order further to strengthen spool 4 and the first sealing skin bat 5 steadinesss that are arranged on valve rod 3, as a kind of more excellent technological scheme, in described valve rod 3, be arranged with the first sealing skin and clap 5 part and be provided with the positioning part 33 of a protrusion, and in valve rod 3, be arranged on outside the one end in brake chamber 11, be arranged with screw thread and with the nut 34 being threaded.Described positioning part 33 and the first sealing skin are clapped 5 laminatings of the one end towards outlet chamber 13, described nut 34 is arranged in the end, one end that spool 4 and brake chamber 11 internal faces are tightly connected, by screwing nut 34, further spool 4 and the first sealing skin bat 5 are fastened between nut 34 and positioning part 33.
Further, in order to extend the working life of spool 4 and to strengthen sealing, as a kind of more excellent technological scheme, the structure of described spool 4 is boss shape, and the periphery, one end being tightly connected with brake chamber 11 internal faces in described spool 4 offers the circular groove of at least one axis and spool 4 axis conllinear, in described circular groove, be provided with the y-shaped ring 41 that disconnected cross section structure is Y shape.In the present embodiment, the periphery, one end being tightly connected with brake chamber 11 internal faces in described spool 4 evenly offers the circular groove of two axis and spool 4 axis conllinear.
In order to make air way switch valve when realizing braking, can utilize better pressure difference that valve rod will be pushed toward outlet chamber easily, realized rapid braking, and further guaranteed normally carrying out of air way switch valve braking work, as a kind of more excellent technological scheme, large 0.5 times～1.5 times of the area of the described Area Ratio brake chamber 11 for air cavity 12.
In order effectively to avoid most advanced and sophisticated formula sealing configuration in prior art to cause the Rapid Damage of port and Sealing because impulse force is excessive, extend the working life that sealing skin is clapped, strengthen sealing, as a kind of more excellent technological scheme, port between described outlet chamber 13 and confession air cavity 12 is a frustoconic shape import, and the port between outlet chamber 13 and exhaust cavity 14 is a frustoconic shape outlet; It is the round table surface coordinating with frustoconic shape import towards the periphery, one end of frustoconic shape import that described the first sealing skin is clapped in 5, and it is the round table surface coordinating with frustoconic shape import towards the periphery, one end of frustoconic shape outlet that described the second sealing skin is clapped in 6.
In order further to have accelerated to promote the reset of valve rod 3, greatly improve the stability that valve rod 3 resets, as a kind of more excellent technological scheme, air way switch valve of the present utility model also comprises a spring 8, and the end, one end being arranged in described right end cap 22 in exhaust cavity 14 offers a locating slot 221; Described spring 8 one end are set in the nut periphery of described hex screw 32, and are fixedly connected on the end of sealing seat 7, and the other end is installed in locating slot 221.
Below, the use of air way switch valve of the present utility model is specifically described.
The gas pressure intensity that is equal to or greater than access air feed interface P2 by the gas pressure intensity of access brake interface P1 when using the utility model air way switch valve, need to provide source of the gas to air feed interface P2 always.In the present embodiment, while realizing braking, pressurized air to air feed interface P2 access 450kPa, pressurized air to brake interface P1 access 750kPa, utilize brake chamber 11 and promote valve rod 3 for the pressure difference forming between air cavity 12 and move and Compress Spring 8 toward exhaust cavity 14, valve rod 3 drives the first sealing skin to clap 5 sealings for the port between air cavity 12 and outlet chamber 13, and drive the second sealing skin to clap 6 ports of opening between outlet chamber 13 and exhaust cavity 14 simultaneously, realization is pushed to outlet chamber 13 and exhaust cavity 14 by the gas of brake chamber 11, and the gas of outlet chamber 13 is pushed out into gives vent to anger outside interface P3, enter into outside braking brake pipeline, realize while resetting, if while not discharging completely for the gas in air cavity 12 and exhaust cavity 14, open exhaust port P4, discharge unnecessary gas, and stop to brake interface P1 access pressurized air, air feed interface P2 keeps the pressurized air of access 450kPa, utilize for the pressure difference promotion valve rod 3 forming between air cavity 12 and brake chamber 11 and push back toward brake chamber 11, valve rod 3 drives the first sealing skin to clap 5 and opens sealing for the port between air cavity 12 and outlet chamber 13, and drive the second sealing skin to clap the port between 6 sealing outlet chambers 13 and exhaust cavity 14 simultaneously, also utilized the reset of the elastic force effect quickening valve rod 3 of spring 8 simultaneously.
With respect to prior art, the utility model utilizes pressure reduction to switch the gas circuit of air way switch valve, has realized braking and has resetted, and reduces such environmental effects, has extended working life, has reduced maintenance intensity.
The utility model is not limited to above-mentioned mode of execution, if various changes of the present utility model or distortion are not departed to spirit and scope of the present utility model, within if these changes and distortion belong to claim of the present utility model and equivalent technologies scope, the utility model is also intended to comprise these changes and distortion.
Claims (8)
1. an air way switch valve, comprises valve body; In described valve body, be provided with valve pocket, valve rod and spool; It is characterized in that: described valve pocket comprises brake chamber, confession air cavity, outlet chamber and the exhaust cavity of connection successively and axis conllinear; Described brake chamber side is provided with a brake interface being communicated with it; The described air cavity side that supplies is provided with an air feed interface being communicated with it; Described outlet chamber side is provided with an interface of giving vent to anger being communicated with it, and the internal diameter of outlet chamber is less than the internal diameter for air cavity and exhaust cavity; Described exhaust cavity side is provided with an exhaust port being communicated with it;
Described valve rod is arranged in valve pocket, and its one end is arranged in brake chamber, and the other end is arranged in exhaust cavity, and its axis and brake chamber axis conllinear; And one end fixed cover that described valve rod is positioned at exhaust cavity is provided with a sealing seat, the second sealing skin that is installed with a port between outlet chamber and exhaust cavity on sealing seat is clapped;
Described valve core axis and valve rod axis conllinear, and fixed cover is located at valve rod periphery, its one end is peripheral to be tightly connected with brake chamber internal face, and the other end end face is embedded with the first sealing skin of a port between air feed chamber and outlet chamber and claps;
Described valve rod drives described the first sealing skin to clap the break-make of controlling between air cavity and outlet chamber, and drives described the second sealing skin to clap the break-make of controlling between outlet chamber and exhaust cavity simultaneously.
2. air way switch valve according to claim 1, is characterized in that: large 0.5 times～1.5 times of the area of the described Area Ratio brake chamber for air cavity.
3. air way switch valve according to claim 1, is characterized in that: the port between described outlet chamber and confession air cavity is a frustoconic shape import, and the port between outlet chamber and exhaust cavity is a frustoconic shape outlet; Described the first sealing skin is the round table surface coordinating with frustoconic shape import towards the periphery, one end of frustoconic shape import in clapping, and described the second sealing skin is the round table surface coordinating with frustoconic shape import towards the periphery, one end of frustoconic shape outlet in clapping.
4. according to the air way switch valve described in the arbitrary claim of claim 1～3, it is characterized in that: the periphery, one end being tightly connected with brake chamber internal face in described spool offers the circular groove of at least one axis and valve core axis's conllinear, in described circular groove, be provided with the y-shaped ring that disconnected cross section structure is Y shape.
5. air way switch valve according to claim 1, is characterized in that: described valve body opposite end end is respectively equipped with left end cap and right end cap; Described left end cap is by the one end at brake chamber place at least one seal with O ring valve body; Described right end cap is by the one end at exhaust cavity place at least one seal with O ring valve body.
6. air way switch valve according to claim 5, is characterized in that: also comprise a spring, and the end, one end being arranged in described right end cap in exhaust cavity offers a locating slot; Described spring one end is fixedly connected on the end of sealing seat, and the other end is installed in locating slot.
7. air way switch valve according to claim 1, is characterized in that: the structure of described spool is boss shape.
8. air way switch valve according to claim 1, is characterized in that: described brake interface, air feed interface, give vent to anger interface and exhaust port periphery are arranged with respectively one for strengthening the O shape circle of interface and external pipeline connection sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420444684.XU CN204003730U (en) | 2014-08-07 | 2014-08-07 | Air way switch valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420444684.XU CN204003730U (en) | 2014-08-07 | 2014-08-07 | Air way switch valve |
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| Publication Number | Publication Date |
|---|---|
| CN204003730U true CN204003730U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420444684.XU Active CN204003730U (en) | 2014-08-07 | 2014-08-07 | Air way switch valve |
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| CN (1) | CN204003730U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179745A (en) * | 2014-08-07 | 2014-12-03 | 广东省肇庆方大气动有限公司 | Air channel changeover valve and use method thereof |
-
2014
- 2014-08-07 CN CN201420444684.XU patent/CN204003730U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179745A (en) * | 2014-08-07 | 2014-12-03 | 广东省肇庆方大气动有限公司 | Air channel changeover valve and use method thereof |
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