CN111765271A - Gas path control valve and control method - Google Patents

Gas path control valve and control method Download PDF

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Publication number
CN111765271A
CN111765271A CN202010587995.1A CN202010587995A CN111765271A CN 111765271 A CN111765271 A CN 111765271A CN 202010587995 A CN202010587995 A CN 202010587995A CN 111765271 A CN111765271 A CN 111765271A
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CN
China
Prior art keywords
valve
air
hole
valve core
guide sleeve
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Granted
Application number
CN202010587995.1A
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Chinese (zh)
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CN111765271B (en
Inventor
贾永琦
严鉴铂
张海涛
李建峰
赵炜
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Shaanxi Fast Auto Drive Group Co Ltd
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Shaanxi Fast Auto Drive Group Co Ltd
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Priority to CN202010587995.1A priority Critical patent/CN111765271B/en
Priority claimed from CN202010587995.1A external-priority patent/CN111765271B/en
Publication of CN111765271A publication Critical patent/CN111765271A/en
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Publication of CN111765271B publication Critical patent/CN111765271B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0712—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides comprising particular spool-valve sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves

Abstract

The invention discloses a gas circuit control valve and a control method, comprising a mandril, a valve body, a valve core, an upper base, a lower base and a valve; set up the valve through the bottom at the case, set up on-off mechanism simultaneously between last base and case, when putting into gear, the ejector pin triggers the case and removes, at first makes the inside air flue of case end at the removal in-process, makes inlet port and venthole disconnection, then the case continues to remove and makes on-off mechanism communicate airflow channel, makes the exhaust hole pass through airflow channel and venthole intercommunication, realizes the accurate control of gas circuit break-make, has solved the problem that current control valve exists the cluster of gas.

Description

Gas path control valve and control method
Technical Field
The invention relates to the field of transmission control, in particular to a gas circuit control valve and a control method.
Background
At present, heavy trucks all adopt a double-intermediate-shaft transmission with a main box and an auxiliary box structure, and the auxiliary transmission realizes air path on-off control and switching of high and low gears by an air valve. The existing gas path control valves on 8-gear, 12-gear, Volvo 12-gear, S12 and S16 transmissions are simple in structure, low in cost, risky in design, low in service life, inaccurate in on-off of gas valves, and large potential safety hazards of the transmissions due to the fact that gas inlets, gas outlets and gas outlets are communicated simultaneously.
In order to solve the above problems, it is necessary to design a novel air path control valve to improve the safety performance of the transmission.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the gas path control valve and the control method, so that the gas path is more accurately switched on and off and has better sealing property, the problems of gas leakage and clamping stagnation of products under severe extreme working conditions are solved, and the service life of the gas path control valve is prolonged.
The invention is realized by the following technical scheme:
a gas circuit control valve comprises a mandril, a valve body, a valve core, an upper base, a lower base and a valve;
the valve body is provided with a valve hole with one closed end, the lower base is arranged at the closed end of the valve hole, the valve is arranged inside the lower base and can slide up and down, the valve core is arranged in the valve hole, the lower end of the valve core is positioned at the top of the valve, and the ejector rod is arranged on the valve core to move;
the valve body is provided with an air inlet hole, an air outlet hole and an exhaust hole which are all communicated with the valve hole, the upper base is sleeved on the valve core in an empty way and positioned, an air flow channel is arranged between the upper base and the valve core, an on-off mechanism used for controlling the state of the air flow channel is arranged in the air flow channel, an air passage is arranged in the valve core, and an inlet of the air passage is positioned at the lower end of the valve core;
when the valve core is in neutral, the lower end of the valve core is separated from the valve, the air inlet is communicated with the air outlet through the air passage, and the on-off mechanism is used for stopping the air flow passage;
when the gear is engaged, the valve core moves, the bottom of the valve core is abutted to the valve, the air inlet hole is stopped with the air outlet hole, then the valve core continues to move to enable the on-off mechanism to communicate the air flow channel, and the air outlet hole is communicated with the air outlet hole sequentially through the air flow channel and the air passage.
Preferably, the on-off mechanism is a convex shoulder and a concave shoulder which are arranged in the airflow channel, and a sealing device is arranged between the convex shoulder and the concave shoulder;
the valve core moves to enable the convex shoulder and the concave shoulder to be abutted or separated with the sealing device, so that the air flow channel is cut off or communicated.
Preferably, the sealing device is a sealing ring provided with an outer convex shoulder top surface or an inner concave shoulder bottom surface.
Preferably, the valve core is sleeved with an upper guide sleeve, the upper guide sleeve is connected with the valve core in a sliding and sealing manner, and the airflow channel is positioned between the upper guide sleeve and the upper base;
and a delay mechanism is arranged in the valve hole and used for sequentially triggering the valve core and the upper guide sleeve at intervals when the gear is engaged, so that the air inlet hole and the air outlet hole are stopped, and then the air outlet hole is communicated with the air outlet hole.
Preferably, the delay mechanism is a height difference between the top surface of the valve core and the top of the upper guide sleeve, and the top surface of the valve core is higher than the top surface of the upper guide sleeve.
Preferably, an air cavity is arranged between the lower base and the valve hole, a first air hole and a second air hole are formed in the side wall of the lower base, the first air hole is located at the top of the valve, the second air hole is located at the bottom of the valve, and air flow enters the top and the bottom of the valve through the first air hole and the second air hole respectively and is used for resetting the valve and the valve core.
Preferably, a lower guide sleeve is arranged between the lower base and the upper base and is used for guiding the moving direction of the valve body;
and the lower guide sleeve is respectively connected with the valve hole and the valve core in a sealing way through a sealing ring.
Preferably, the lower end of the upper base and the top of the lower guide sleeve are embedded with each other, and the lower part of the upper base is provided with a plurality of notches which are uniformly distributed on the circumference and used for communicating the air passage with the air outlet.
Preferably, the valve hole of the valve body is a through hole, the lower end of the valve hole is provided with a lower cover, and the lower cover is connected with the lower end of the valve hole through a sealing ring.
A control method of a gas circuit control valve, when the neutral gear is adopted, the upper end of a valve core is abutted against the top of a mandril, and meanwhile, an air flow channel between an upper guide sleeve and an upper base is cut off, so that an exhaust hole is disconnected with an air outlet, and an air inlet is communicated with the air outlet through an air passage;
when the gear is engaged, the valve core moves to enable the lower end of the valve core to be in contact with the valve, the air passage in the valve core is sealed, the air inlet hole and the air outlet hole are disconnected, then the valve core continues to move until the air flow channel is communicated, and the air outlet hole is communicated with the air outlet hole through the air flow channel and the air passage in sequence;
when the gear is picked, the air flow generates thrust to the lower end of the valve core through the air inlet hole, the valve core moves towards and upwards synchronously with the upper guide sleeve, meanwhile, the valve moves synchronously until the air flow channel is blocked, the exhaust hole and the air outlet hole are stopped, the valve core continues to move upwards until the upper end of the valve core is abutted against the ejector rod under the action of air pressure, the lower end of the valve core is separated from the valve, and the air inlet hole is communicated with the air outlet hole through the air passage.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the air path control valve provided by the invention, the valve is arranged at the bottom of the valve core, and the on-off mechanism is arranged between the upper base and the valve core, so that when the gear is engaged, the valve core is triggered by the ejector rod to move, the air passage in the valve core is firstly stopped in the moving process, the air inlet hole and the air outlet hole are disconnected, then the valve core continuously moves to enable the on-off mechanism to communicate the air flow channel, the air outlet hole is communicated with the air outlet hole through the air flow channel, the accurate control of the on-off of the air path is realized, and the problem of air leakage of the.
Drawings
FIG. 1 is an internal structural view of the gas circuit control valve of the present invention;
FIG. 2 is a cross-sectional view of the gas circuit control valve of the present invention;
FIG. 3 is a block diagram of the valve cartridge of the present invention;
FIG. 4 is a block diagram of the upper base of the present invention;
FIG. 5 is a cross-sectional view of the upper base of the present invention;
FIG. 6 is a view showing the construction of the lower base of the present invention;
fig. 7 is a cross-sectional view of the lower base of the present invention.
In the figure: 1. a top rod; 4. an exhaust hole; 5. an air exhaust plug; 6. a screw; 7. a rubber pad; 8. an air inlet; 10. a lower cover; 11. an air outlet; 12. a valve body; 14. an upper guide sleeve; 15. a valve core; 16. an upper base; 20. a lower guide sleeve; 23. a lower base; 24. a valve; 151. an airway; 231. a second air hole; 232. a first air hole.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1 and 2, the air passage control valve includes a push rod 1, a valve body 12, a valve core 15, an upper base 16, a lower base 23, and a valve 24.
The valve body 12 is provided with a valve hole with one closed end, the lower base 23 is arranged at the closed end of the valve hole, the valve 24 is arranged inside the lower base 23 and can slide up and down, the lower end of the valve core 15 is arranged in the lower base 23 and is positioned at the top of the valve 24, the ejector rod 1 is arranged at the top of the valve core 15, the end part of the ejector rod extends into the upper end of the valve hole, and the ejector rod is used for triggering the valve core to move axially along the valve hole.
An air inlet 8, an air outlet 11 and an air outlet 4 are arranged on the valve body and are communicated with the valve hole, an upper base 16 is sleeved on the valve core in a hollow mode and is positioned, an air flow channel is arranged between the upper base 16 and the valve core, an on-off mechanism used for controlling the state of the air flow channel is arranged in the air flow channel, an air passage 151 is arranged inside the valve core 15, and an inlet of the air passage 151 is located at the lower end of the valve core;
when the gear is neutral, the ejector rod 1 is in a free state, the lower end of the valve core is separated from the valve 24, the air inlet hole 8 is communicated with the air outlet hole 11 through the air passage 151, and meanwhile, the air flow channel is stopped by the on-off mechanism.
When the gear is engaged, the valve core moves, the bottom of the valve core is abutted to the valve to seal the air passage, the air inlet hole and the air outlet hole are stopped, then the valve core continues to move to enable the on-off mechanism to communicate the air flow passage, and the air outlet hole 4 is communicated with the air outlet hole 4 sequentially through the air flow passage and the outlet of the air passage 151.
This gas circuit control valve sets up the valve through the bottom at the case, sets up on-off mechanism simultaneously between last base 16 and case, when putting into gear, the ejector pin triggers the case and removes, at first makes the inside air flue of case end at the removal in-process, makes inlet port and venthole disconnection, then the case continues to remove and makes on-off mechanism communicate airflow channel, make the exhaust hole pass through airflow channel and venthole intercommunication, realize the accurate control of gas circuit break-make, the problem that current control valve exists the cluster of gas has been solved.
Referring to fig. 6 and 7, the lower base 23 is provided inside with a mounting hole, the valve is fitted in the mounting hole, a boss is provided on a side wall of the mounting hole and located at the top of the valve for positioning the valve, a spring is provided at the bottom of the valve for resetting the valve, the lower end of the valve core is fitted at the upper portion of the mounting hole of the lower base and located at the top of the valve 24, and a gap is provided between the lower end of the valve core and the mounting hole to form an air guide channel.
The lower base 23 is arranged in the valve hole, an air cavity is arranged between the lower base and the valve hole, a first air hole 232 and a second air hole 231 are arranged on the side wall of the lower base 23, the first air hole 232 is positioned at the top of the valve, the second air hole 231 is positioned at the bottom of the valve, when air enters, the air enters the air cavity through the air inlet hole, then the air is divided into two paths, and one path of air sequentially passes through the first air hole 232 and the air guide channel to enter an air channel 151 of the valve core and then is discharged through the air outlet hole; the other path enters the lower end of the valve through the second air hole 231, and when the gear is picked off, the valve is reset by air pressure and spring force generated by air flow, so that the resetting effectiveness of the valve is ensured, and meanwhile, the gas utilization rate is improved.
Referring to fig. 3, the cross section of the air channel 151 is a T-shaped structure, the lower end of the air channel is located at the bottom of the valve core, two outlets at the upper end of the air channel are communicated with an air flow channel, the air flow channel is communicated with an exhaust hole, air enters from an air inlet hole, then enters an air cavity, then enters the air channel 151 through a first air hole 232, then enters the air flow channel through the upper end of the air channel, and finally is led out through an air outlet hole.
The on-off mechanism is arranged in the airflow channel and is positioned on an outer convex shoulder on the outer wall of the valve core and an inner concave shoulder on the inner wall of the upper base, and a sealing device is arranged between the outer convex shoulder and the inner concave shoulder.
When the gear is neutral, the convex shoulder and the concave shoulder are respectively abutted with the sealing device, so that the airflow channel is cut off;
when the gear is engaged, the valve core moves to enable the convex shoulder or the concave shoulder to be communicated with the sealing device, so that the air flow channel is communicated, and the exhaust hole is communicated with the air outlet 11 sequentially through the air flow channel and the upper end of the air channel 151.
This sealing device is elastic sealing device, specifically is O type circle or rectangle sealing washer, selects elastic device compression thickness to need control, makes the elasticity that compression thickness produced be less than the thrust of atmospheric pressure to the case, need guarantee simultaneously when putting into gear, before the lower extreme of case and the valve contact, elastic sealing device and evagination circular bead or indent circular bead butt end the air current passageway, guarantee the accurate control of gas circuit break-make.
In another embodiment, referring again to fig. 1 and 2, the valve core 15 is sleeved with an upper guide sleeve 14, the air flow channel is located between the upper guide sleeve 14 and the upper base, the outer convex shoulder is arranged on the outer portion of the upper guide sleeve 14, and the top surface of the outer convex shoulder is provided with an O-ring; the upper guide sleeve 14 is connected with the valve core in a sliding and sealing mode, the upper end of the upper guide sleeve 14 is lower than the top of the valve core, the lower end of the upper guide sleeve 14 is located on the upper portion of the air channel 151 and is a control surface of the upper guide sleeve, a spring is sleeved on the upper guide sleeve, the lower end of the spring abuts against the top of the upper base, the upper end of the spring abuts against the top of the ejector rod, when the ejector rod moves downwards, the spring is compressed firstly, then the valve core is compressed, impact on the valve core is small, and the.
The upper guide sleeve 14 is connected with the valve core in a sliding and sealing mode through an O-shaped ring.
When the neutral gear, the air current is derived from air flue 151, because this air current pressure chamber is great, can produce ascending thrust to the lower extreme of last uide bushing, makes evagination circular bead and indent circular bead compress O type circle, ends the air current passageway, when picking the fender simultaneously, is used for making upper uide bushing 14 reset.
When putting into gear, because the top of going up the uide bushing is less than the top surface of case, consequently the ejector pin is when promoting the case removal, atmospheric pressure produces thrust to the bottom of going up the uide bushing, make the case remove, lower extreme and the valve contact when the case, end inlet port and venthole, the valve continues to remove until the top parallel and level with last uide bushing this moment, then case and last uide bushing synchronous motion, and then make airflow channel open, make exhaust hole 4 and venthole 11 intercommunication, delay through case and last uide bushing triggers, realize the accurate break-make of gas circuit, the problem of the string of gas of avoiding appearing.
Referring to fig. 4 and 5, a lower guide sleeve 20 is further arranged between the lower base 23 and the upper base 16 and used for guiding the moving direction of the valve body, and therefore the eccentric wear problem is avoided, meanwhile, the lower end of the upper base and the top of the lower guide sleeve 20 are embedded mutually, the upper base 16 is positioned, meanwhile, a plurality of notches are uniformly distributed on the circumference of the lower portion of the upper base and used for enabling gas to enter the gas outlet hole 11, in order to avoid air flow from passing through a gap between the upper guide sleeve and the valve hole, the outer wall of the lower guide sleeve 20 is sealed with the valve hole through an O-ring, meanwhile, the inner wall of the lower guide sleeve 20 is connected with the valve core through the O-ring in a sealing mode, the lower guide sleeve is used for guiding the moving method of the valve.
The valve hole of the valve body is a through hole, the lower end of the valve hole is provided with a lower cover 10, and the lower cover is connected with the lower end of the valve hole through a sealing ring to seal the lower end of the valve hole.
An exhaust plug cap 5 is arranged at the outlet of the exhaust hole 4, the exhaust plug cap 5 is connected with the valve body through a screw 6, and a rubber pad 7 is further arranged at the exhaust hole. The air exhaust plug is integrated in the air valve air exhaust hole, and the sealing gasket is designed inside, so that when the air exhaust is smooth, the air exhaust plug prevents external dust, impurities and water vapor from entering and provides a good working environment for the air valve.
The working principle of the gas circuit control valve provided by the invention is explained in detail below.
When the gear is neutral, the ejector rod is in a free state, the upper end of the valve core is abutted against the top of the ejector rod under the action of air pressure, meanwhile, the upper guide sleeve and the upper base are sealed through an O-shaped seal, so that the exhaust hole is disconnected from the air outlet hole, and the air inlet hole is communicated with the air outlet hole through the air passage 151.
When the gear is engaged, the ejector rod is stressed to move towards the inside of the valve core, so that the valve core is driven to move, the lower end of the valve core is in contact with the valve, the air passage 151 in the valve core is sealed, and the air inlet hole and the air outlet hole are disconnected.
Then the valve core continues to move until the upper end of the valve core is flush with the upper end of the upper guide sleeve 14, the valve core and the upper guide sleeve synchronously move, the upper guide sleeve drives the O-shaped ring to move, the O-shaped ring is separated from the upper base, the air flow channel is communicated, and the exhaust hole is communicated with the air outlet hole sequentially through the air flow channel and the air passage.
When the gear is picked, the spring pushes the ejector rod to reset, the air flow enters the air guide channel through the air inlet hole to generate thrust on the lower end of the valve core, the valve core moves synchronously with the upper guide sleeve, meanwhile, the valve 24 moves synchronously under the action of the spring and air pressure until the O-shaped ring on the upper guide sleeve is abutted against the upper base, the air flow channel is blocked, then the valve reaches a limiting position, at the moment, the air outlet hole is stopped with the air outlet hole, and meanwhile, the air inlet hole is stopped with the air outlet hole.
Under the action of air pressure, the valve core continues to move upwards until the upper end of the valve core is abutted against the ejector rod, so that the lower end of the valve core is separated from the valve, and the air inlet hole is communicated with the air outlet hole through the air passage 151.
This gas circuit control valve's valve body is overall structure, adopt integral type structural design, and once take shape the valve opening, can guarantee valve body hole axiality, be different from traditional pneumatic valve upper cover and valve body screw connection structure, the case that lateral force leads to in avoiding using, the sealing washer is ground partially, gas leakage appears in the pneumatic valve, the jamming problem, and simultaneously, because the valve opening axiality is better, no longer use the uide bushing between ejector pin and the valve body, reduce the uide bushing pressure equipment link, and simultaneously, the case is installed from the lower part of case, and the installation has been slowed down, and the installation efficiency is improved.
In addition, the ejector rod and the valve core of the gas circuit control valve adopt a split structure, namely the ejector rod pushes the valve core to move, the design can ensure that the valve core is stressed vertically, and the eccentric wear problem caused by the lateral force of the ejector rod compressed by the shifting block in the use process is avoided.
Secondly, when the valve core is pushed by the ejector rod to move up and down, the sealing ring moves in a smooth plane in the lower guide sleeve 20, so that the abrasion is small, and the service life is long; when the valve core of the existing product moves up and down, the sealing ring passes through the small hole of the valve core, and the valve core is impacted greatly on the sealing ring, so that the service life is short.
In addition, the air path control valve of the invention stops the air inlet and the air outlet through the movement of the valve core, then the valve core moves further, so that the air outlet is communicated with the air outlet, the on-off control of the air path is more accurate, and the connection points of the air inlet and the air outlet, the air outlet and the air outlet are fixed values; the sealing ring of the existing product is matched with the small hole of the valve core to realize sealing, the cut-off point of the air inlet hole and the air outlet hole, and the communicating point of the air outlet hole and the exhaust hole are not fixed, so that the phenomenon that the air inlet hole, the air outlet hole and the exhaust hole of the existing control valve are communicated simultaneously is solved.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (10)

1. The gas path control valve is characterized by comprising a mandril (1), a valve body (12), a valve core (15), an upper base (16), a lower base (23) and a valve (24);
the valve body (12) is provided with a valve hole with one closed end, the lower base (23) is arranged at the closed end of the valve hole, the valve (24) is arranged inside the lower base (23) and can slide up and down, the valve core (15) is arranged in the valve hole, the lower end of the valve core is positioned at the top of the valve (24), and the ejector rod (1) is arranged on the valve core (15) to move;
the valve body is provided with an air inlet (8), an air outlet (11) and an exhaust hole (4) which are all communicated with the valve hole, the upper base (16) is sleeved on the valve core in an empty way and is positioned, an air flow channel is arranged between the upper base (16) and the valve core, an on-off mechanism used for controlling the state of the air flow channel is arranged in the air flow channel, an air passage (151) is arranged in the valve core (15), and the inlet of the air passage (151) is positioned at the lower end of the valve core;
when the valve is in neutral, the lower end of the valve core is separated from the valve (24), the air inlet (8) is communicated with the air outlet (11) through the air passage (151), and the air flow passage is stopped by the on-off mechanism;
when the gear is engaged, the valve core moves, the bottom of the valve core is abutted to the valve, the air inlet hole is stopped with the air outlet hole, then the valve core continues to move to enable the on-off mechanism to communicate the air flow channel, and the exhaust hole (4) is communicated with the exhaust hole (4) sequentially through the air flow channel and the air passage (151).
2. The air passage control valve as claimed in claim 1, wherein the on-off mechanism is a male shoulder and a female shoulder provided in the air flow passage, and a sealing means is provided between the male shoulder and the female shoulder;
the valve core moves to enable the convex shoulder and the concave shoulder to be abutted or separated with the sealing device, so that the air flow channel is cut off or communicated.
3. The air passage control valve as claimed in claim 2, wherein the sealing means is a sealing ring provided with a convex shoulder top surface or a concave shoulder bottom surface.
4. The air passage control valve according to claim 1 or 2, wherein the valve core (15) is sleeved with an upper guide sleeve (14), the upper guide sleeve (14) is connected with the valve core (15) in a sliding and sealing manner, and the air flow channel is positioned between the upper guide sleeve (14) and the upper base (16);
the valve hole is internally provided with a delay mechanism which is used for sequentially triggering the valve core and the upper guide sleeve (14) at intervals when the gear is put into gear, so that the air inlet hole and the air outlet hole are stopped, and then the air outlet hole is communicated with the air outlet hole.
5. The air passage control valve according to claim 4, wherein the delay mechanism is a height difference between the top surface of the valve core and the top of the upper guide sleeve, and the top surface of the valve core is higher than the top surface of the upper guide sleeve.
6. The air path control valve as claimed in claim 1, wherein an air cavity is disposed between the lower base and the valve hole, a first air hole (232) and a second air hole (231) are disposed on a side wall of the lower base (23), the first air hole (232) is located at a top of the valve, the second air hole (231) is located at a bottom of the valve, and the air flow enters the top and the bottom of the valve (24) through the first air hole (232) and the second air hole (231) respectively for resetting the valve and the valve core.
7. The air path control valve as claimed in claim 1, wherein a lower guide sleeve (20) is arranged between the lower base (23) and the upper base (16) for guiding the moving direction of the valve body;
and the lower guide sleeve (20) is respectively connected with the valve hole and the valve core in a sealing way through a sealing ring.
8. The air passage control valve as claimed in claim 7, wherein the lower end of the upper base and the top of the lower guide sleeve (20) are embedded with each other, and a plurality of notches are uniformly distributed on the circumference of the lower portion of the upper base for communicating the air passage with the air outlet.
9. The air passage control valve as claimed in claim 1, wherein the valve hole of the valve body is a through hole, and a lower cover (10) is provided at a lower end thereof and connected to the lower end of the valve hole through a sealing ring.
10. A control method of the gas circuit control valve according to any one of claims 1 to 9,
when the valve core is in neutral, the upper end of the valve core is abutted against the top of the ejector rod, and meanwhile, an air flow channel between the upper guide sleeve and the upper base is cut off, so that the air exhaust hole is disconnected from the air outlet hole, and the air inlet hole is communicated with the air outlet hole through an air channel (151);
when the gear is engaged, the valve core moves to enable the lower end of the valve core to be in contact with the valve, an air passage (151) in the valve core is sealed, an air inlet hole is disconnected with an air outlet hole, then the valve core continues to move until an air flow channel is communicated, and an air outlet hole is communicated with the air outlet hole through the air flow channel and the air passage in sequence;
when the gear is picked, the air flow generates thrust to the lower end of the valve core through the air inlet hole, the valve core moves towards and upwards in synchronization with the upper guide sleeve, meanwhile, the valve (24) moves in synchronization until the air flow channel is blocked, the exhaust hole is stopped with the air outlet hole, the valve core continues to move upwards until the upper end of the valve core is abutted against the ejector rod under the action of air pressure, the lower end of the valve core is separated from the valve, and the air inlet hole is communicated with the air outlet hole through the air passage (151).
CN202010587995.1A 2020-06-24 Gas circuit control valve and control method Active CN111765271B (en)

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CN202010587995.1A CN111765271B (en) 2020-06-24 Gas circuit control valve and control method

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Application Number Priority Date Filing Date Title
CN202010587995.1A CN111765271B (en) 2020-06-24 Gas circuit control valve and control method

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011117519A (en) * 2009-12-02 2011-06-16 Trinity Industrial Co Ltd Valve device
CN202252113U (en) * 2011-09-06 2012-05-30 浙江科力车辆控制系统有限公司 Novel double-H valve for transmission case of commercial vehicle
CN102537327A (en) * 2012-02-29 2012-07-04 盐城市步高汽配制造有限公司 Pneumatic valve for medium and heavy truck to shift gear
CN106321804A (en) * 2016-09-28 2017-01-11 陕西法士特齿轮有限责任公司 Gas valve and pressure switch integrated structure
CN208348636U (en) * 2018-06-20 2019-01-08 克诺尔商用车系统（重庆）有限公司 Pneumatic reversal valve
CN212690917U (en) * 2020-06-24 2021-03-12 陕西法士特汽车传动集团有限责任公司 Gas circuit control valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011117519A (en) * 2009-12-02 2011-06-16 Trinity Industrial Co Ltd Valve device
CN202252113U (en) * 2011-09-06 2012-05-30 浙江科力车辆控制系统有限公司 Novel double-H valve for transmission case of commercial vehicle
CN102537327A (en) * 2012-02-29 2012-07-04 盐城市步高汽配制造有限公司 Pneumatic valve for medium and heavy truck to shift gear
CN106321804A (en) * 2016-09-28 2017-01-11 陕西法士特齿轮有限责任公司 Gas valve and pressure switch integrated structure
CN208348636U (en) * 2018-06-20 2019-01-08 克诺尔商用车系统（重庆）有限公司 Pneumatic reversal valve
CN212690917U (en) * 2020-06-24 2021-03-12 陕西法士特汽车传动集团有限责任公司 Gas circuit control valve

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