CN104627156A - Three-level pressure transformation relay valve and three-level pressure transformation relay valve kit thereof - Google Patents
Three-level pressure transformation relay valve and three-level pressure transformation relay valve kit thereof Download PDFInfo
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- CN104627156A CN104627156A CN201410700873.3A CN201410700873A CN104627156A CN 104627156 A CN104627156 A CN 104627156A CN 201410700873 A CN201410700873 A CN 201410700873A CN 104627156 A CN104627156 A CN 104627156A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
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- Valves And Accessory Devices For Braking Systems (AREA)
- Multiple-Way Valves (AREA)
Abstract
Provided are a three-level pressure transformation relay valve and a three-level pressure transformation relay valve kit thereof. A counter voltage air chamber A and a counter voltage air chamber B which are of different sizes are arranged in a lower valve body of the three-level pressure transformation relay valve, and when the three-level pressure transformation relay valve is communicated with a voltage regulating pipeline, different counter voltages can be produced in the two air chambers respectively, so that three-level pressure transformation of the relay valve is achieved to adapt different load conditions. The three-level pressure transformation relay valve kit makes a three-grade change-over switch be combined with the three-level pressure transformation relay valve, the operating conditions of the relay valve are regulated through the three-grade change-over switch, and the switch among the three levels is achieved; the structure is simple and practical, and the stability is good.
Description
Technical field
The present invention relates to the technical field of brake system of car, particularly relate to a kind of three grades of variable pressure relay valves and three grades of variable pressure relay valve external members thereof.
Background technology
Relay valve belongs to a part for automobile air brake brake system, and in the brake system of autotruck, relay valve plays Reaction time shorten and pressure setting time.The enterprising gas port of relay valve connects air receiver, and air extractor duct connects compressed air brake cylinder.When stepping on brake pedal, the output pressure of brake activation valve inputs as the control presssure of relay valve, under control presssure effect, air inlet valve is pushed open, so pressurized air just directly enters compressed air brake cylinder by admission port by air receiver, and do not need to flow through brake activation valve, this substantially reduces the loading line distance of compressed air brake cylinder, accelerates the gas replenishment process of compressed air brake cylinder, and then substantially reduces the reaction time of brake.Therefore relay valve is amplifying relay valve again.
Relay valve is used for the end of long pipe runs, makes the pressurized air of air receiver be full of compressed air brake cylinder fast, as in trailer or semitrailer brake system.In prior art, being generally the different area of thrust surface by utilizing large piston and valve piston, realizing opening the secondary of air inlet valve, thus soft braking when realizing unloaded is braked with high strength during heavy duty; Can only realize secondary change, adapt to heavy duty and unloaded two kinds of situations, but sometimes be in medium load due to lorry, existing relay valve and the parts controlling relay valve are not the situations of very applicable normal loading, have much room for improvement.
Summary of the invention
The object of the invention is: the three grades of variable pressure relay valves providing a kind of structure simple, easy to use and three grades of variable pressure relay valve external members thereof.
Technical scheme of the present invention is: a kind of three grades of variable pressure relay valves, comprise upper cover, valve body, relay piston, valve member, and is arranged on the gas-charging connection of upper cover and controls joint, is arranged on the braking joint of body base; It is characterized in that: upper cover is connected with valve seal; In body cavity, sealing shroud is equipped with relay piston, forms positive pressure room between the upper surface of relay piston and upper cover,
The lower surface of relay piston is provided with two the step vizards and step surface second that diameter diminishes successively, the step surface third mated with step vizard, the step surface fourth of mating with step surface second is provided with in valve body, counter pressure air chamber first is formed at step vizard and step surface third diameter, between step surface second and step surface fourth, form counter pressure air chamber second, be provided with the pressure regulation interface first be communicated with counter pressure air chamber first, the pressure regulation interface second be communicated with counter pressure air chamber second in valve body side;
The valve inner be positioned at below relay piston is provided with valve box, valve member is positioned at valve box, top, valve box arranges valve port, and relay piston bottom arranges bottom conduit, and the lower edge diameter of this bottom conduit is less than the diameter of valve port for opening and closing control to valve member.
The upside of upper cover is provided with inflation tube chamber, and gas-charging connection is positioned at one end of inflation tube chamber, and the other end sealing of inflation tube chamber is fixed with plug, controls joint and is connected to inflation tube chamber sidewall; At appendix cavity inner sleeve, piston body is housed, between piston body and plug, is connected with thrust spring; Described piston body is provided with the left piston near gas-charging connection and the right piston near plug, when gas-charging connection is inflated, only there are left piston and appendix cavity wall to seal when contacting and reset, only to have right piston seal with inflation tube chamber and contact, further, during inflation, right piston right piston when making control joint and upper cover inner space and reset that moves to right moves to left control joint and upper cover cavity is isolated.
The left end of described piston body arranges inner chamber, is set with the check valve with gas-charging connection fitted seal in inner chamber.
The intracavity sidewall of described piston body left end is provided with air extractor duct, and air extractor duct is positioned at the left end of left piston; The gas ducting be communicated with trailer gaholder is provided with in valve body side; The air extractor duct of piston body left end inner chamber is communicated with gas ducting.
Described valve member comprises sealing shroud and is fixed in valve seat bottom valve box, and be set with the valve of hollow in valve seat, valve upper end seals with valve port and docks, between valve seat and valve, be connected with valve spring; Body cavity outside valve port is communicated with braking joint, and the valve box inside valve port is communicated with inlet suction port, and valve cavity is communicated with as exhaust passage with described lower guide tube cavity.
In the middle part of the lower port of described valve seat, by screw, dust-proof cushion is installed.
A kind of three grades of variable pressure relay valve external members, comprise three grades of variable pressure relay valves and third gear change-over swith, it is characterized in that:
Three grades of described variable pressure relay valves comprise upper cover, valve body, relay piston, valve member, and are arranged on the gas-charging connection of upper cover and control joint, are arranged on the braking joint of body base;
Upper cover is connected with valve seal; In body cavity, sealing shroud is equipped with relay piston, forms positive pressure room between the upper surface of relay piston and upper cover,
The lower surface of relay piston is provided with two the step vizards and step surface second that diameter diminishes successively, the step surface third mated with step vizard, the step surface fourth of mating with step surface second is provided with in valve body, counter pressure air chamber first is formed at step vizard and step surface third diameter, between step surface second and step surface fourth, form counter pressure air chamber second, be provided with the pressure regulation interface first be communicated with counter pressure air chamber first, the pressure regulation interface second be communicated with counter pressure air chamber second in valve body side;
The valve inner be positioned at below relay piston is provided with valve box, valve member is positioned at valve box, top, valve box arranges valve port, and relay piston bottom arranges bottom conduit, and the lower edge diameter of this bottom conduit is less than the diameter of valve port for opening and closing control to valve member;
Described third gear change-over swith comprises upper cover body, lower base, install the conversion valve between lid and lower base, described lower base bottom is provided with an admission port and two air extractor ducts, two air extractor ducts are respectively by pipeline and described pressure regulation armatine, pressure modulating opening second connects, the top of lower base is outstanding cylinder table, described upper cover body bottom is the sleeve mated with cylinder table, in sleeve, swivel is installed, stretching out Long Circle plug in the middle part of this swivel lower surface is inserted into inside the Long Circle pit of the coupling of conversion valve upper surface, upper cover body is stretched out on swivel top,
Described conversion valve is between swivel lower surface and the upper surface of cylinder table, fit for sealing between conversion valve lower surface and the upper surface of cylinder table, this conversion valve is disc, conversion valve diameter mates with sleeve diameter, and conversion valve thickness mates with the distance between cylinder table upper surface, swivel lower surface;
The upper surface of described cylinder table is provided with and is communicated with two air extractor ducts with admission port respectively and is distributed on three pores in same semicircumference, and be provided with deflation hole at the upper surface center of cylinder table, this deflation hole passes lower base and is communicated with air,
The groove first of semicircular arc is provided with at the lower surface of conversion valve; The groove second of 1/4 circular arc is also provided with at the lower surface of conversion valve, flow guide recesses third is also provided with at the lower surface of conversion valve, this flow guide recesses third one end communication groove second, the circle centre position that the other end is positioned at conversion valve lower surface is corresponding with the deflation hole of cylinder table upper surface, groove first and groove second positioned opposite, groove first and groove second form circular annular region in rotary course to be had overlapping with three pores of cylinder table upper surface.
For piston area coordinates between swivel lateral surface with sleeve medial surface, the plug inside of swivel bottom is spring cavity, is provided with spring in spring cavity inside; The lower surface of described swivel is provided with annular groove, is provided with the upper pore penetrating conversion valve to top in described groove first, and on this, pore is communicated with annular groove inside; What swivel top was downward is provided with several retainer spring chambeies, and inside is provided with the retainer spring of end band ball, the upper surface in the sleeve of upper cover body is provided with the location hole of coupling; Be provided with hermetically-sealed construction between swivel upper side and upper cover body internal face, the internal face of cylinder table side and sleeve lower end is provided with hermetically-sealed construction; Be connected by screw between upper cover body and lower base; Be provided with at the sidepiece of upper cover body the gear display disc that level stretches out, the part that upper cover body is stretched out on swivel top is provided with the knob of band instruction.
The upside of upper cover is provided with inflation tube chamber, and gas-charging connection is positioned at one end of inflation tube chamber, and the other end sealing of inflation tube chamber is fixed with plug, controls joint and is connected to inflation tube chamber sidewall; At appendix cavity inner sleeve, piston body is housed, between piston body and plug, is connected with thrust spring; Described piston body is provided with the left piston near gas-charging connection and the right piston near plug, when gas-charging connection is inflated, only there are left piston and appendix cavity wall to seal when contacting and reset, only to have right piston seal with inflation tube chamber and contact, further, during inflation, right piston right piston when making control joint and upper cover inner space and reset that moves to right moves to left control joint and upper cover cavity is isolated; The left end of described piston body arranges inner chamber, is set with the check valve with gas-charging connection fitted seal in inner chamber; The intracavity sidewall of described piston body left end is provided with air extractor duct, and air extractor duct is positioned at the left end of left piston; The gas ducting be communicated with trailer gaholder is provided with in valve body side; The air extractor duct of piston body left end inner chamber is communicated with gas ducting.
Described valve member comprises sealing shroud and is fixed in valve seat bottom valve box, and be set with the valve of hollow in valve seat, valve upper end seals with valve port and docks, between valve seat and valve, be connected with valve spring; Body cavity outside valve port is communicated with braking joint, and the valve box inside valve port is communicated with inlet suction port, and valve cavity is communicated with as exhaust passage with described lower guide tube cavity; In the middle part of the lower port of described valve seat, by screw, dust-proof cushion is installed.
Technique effect of the present invention:
These three grades of variable pressure relay valves arrange two counter pressure air chamber first not of uniform size and second in lower valve body, after itself and pressure regulation pipeline are connected, different counter pressure can be produced respectively in two air chambers, thus make this relay valve realize three grades of transformations, to adapt to different load conditions.
Third gear change-over swith is combined with above-mentioned three grades of variable pressure relay valves by these three grades of variable pressure relay valve external members, by the mode of operation adjusting relay valve of third gear change-over swith, realizes the conversion between three grades, simple and practical, good stability.
Accompanying drawing explanation
Fig. 1 is that the master of three grades of variable pressure relay valves looks cross-sectional view;
Fig. 2 is that cross-sectional view is looked on a left side for three grades of variable pressure relay valves;
Fig. 3 is the plan structure schematic diagram of three grades of variable pressure relay valves;
Fig. 4 is that the master of relay valve third gear change-over swith looks cross-sectional view;
Fig. 5 is that cross-sectional view is looked on a left side for relay valve third gear change-over swith;
Fig. 6 is the plan structure schematic diagram of relay valve third gear change-over swith;
Fig. 7 is the B-B cross-sectional view of Fig. 5;
Fig. 8 is the A-A cross-sectional view of Fig. 4;
Fig. 9 is that the master of conversion valve looks cross-sectional view;
Figure 10 is that a left side for conversion valve is depending on looking cross-sectional view;
Figure 11 is one of perspective view of conversion valve;
Figure 12 is the perspective view two of conversion valve;
Figure 13 is the position view of relay valve conversion valve of this third gear change-over swith when heavy duty;
Figure 14 is the position view of relay valve conversion valve of this third gear change-over swith when mark carries;
Figure 15 is the position view of relay valve conversion valve of this third gear change-over swith when zero load;
Figure 16 is the johning knot composition of these three grades of variable pressure relay valve external members;
1. screw, 2. flat gasket, 3. dust-proof cushion, 4. exhaust seat, 5. circlip, 6.O type circle, 7. valve spring, 8.O type circle, 9. valve, 10.O type circle, 11. plugs, 12. trip rings, 13. retracing springs, 14.O type circle, 15. relay pistons, 16.O type circle, 17.O type circle, 18.O type circle, 19.O type circle, 20.O type circle, 21.O type circle, 22. planar sealing pads, 23. valve ports, 24. joints, 25. pistons, 26. minor valves, 27. springs, 28.O type circle, 29. springs, 30.O type circle, 31. upper covers, 32. plugs, 33.O type circle, 34. valve bodies, 35. screws, 36. spring chairs, 37. counter pressure air chamber first, 38. counter pressure air chamber second, 39. positive pressure air chambers, 40a. controls joint one, 40b. controls joint two, 41. inflation tube chambers, 42. left pistons, 43. right pistons, 44. filling channels, 45. trailer gaholder joints, 46. bottom conduits, 47a. braking joint one, 47b. braking joint two, 48. is valve box, and 49. is valve port, 50. pressure regulation interface first, 51. pressure regulation interface second,
The sleeve of 101. knobs, 102. swiveies, 103. gear display discs, 104. balls, 105. retainer springes, 106. plugs, 107. retainer spring chambeies, 108. upper cover body, 109. spring cavitys, 110. springs, 111. conversion valves, 112. lower bases, 113. deflation holes, 114. screws, 115. air extractor ducts, 116. admission ports, 117. pores, 118. upper cover body;
111-1. Long Circle pit, the upper pore of 111-2., 111-3. groove second, 111-4. groove third, 111-5. groove first;
1001. third gear change-overs swith, 1002. pipelines, 1003. three grades of variable pressure relay valves.
Detailed description of the invention
Embodiment: see three grades of variable pressure relay valves a kind of in Fig. 1-3, figure, comprise upper cover, valve body, relay piston, valve member, and be arranged on the gas-charging connection of upper cover and control joint, be arranged on the braking joint of body base; Upper cover is connected with valve seal; In body cavity, sealing shroud is equipped with relay piston, forms positive pressure room between the upper surface of relay piston and upper cover,
The lower surface of relay piston is provided with two the step vizards and step surface second that diameter diminishes successively, the step surface third mated with step vizard, the step surface fourth of mating with step surface second is provided with in valve body, counter pressure air chamber first is formed at step vizard and step surface third diameter, between step surface second and step surface fourth, form counter pressure air chamber second, be provided with the pressure regulation interface first be communicated with counter pressure air chamber first, the pressure regulation interface second be communicated with counter pressure air chamber second in valve body side;
The valve inner be positioned at below relay piston is provided with valve box, valve member is positioned at valve box, top, valve box arranges valve port, and relay piston bottom arranges bottom conduit, and the lower edge diameter of this bottom conduit is less than the diameter of valve port for opening and closing control to valve member.
The upside of upper cover is provided with inflation tube chamber, and gas-charging connection is positioned at one end of inflation tube chamber, and the other end sealing of inflation tube chamber is fixed with plug, controls joint and is connected to inflation tube chamber sidewall; At appendix cavity inner sleeve, piston body is housed, between piston body and plug, is connected with thrust spring; Described piston body is provided with the left piston near gas-charging connection and the right piston near plug, when gas-charging connection is inflated, only there are left piston and appendix cavity wall to seal when contacting and reset, only to have right piston seal with inflation tube chamber and contact, further, during inflation, right piston right piston when making control joint and upper cover inner space and reset that moves to right moves to left control joint and upper cover cavity is isolated.
The left end of described piston body arranges inner chamber, is set with the check valve with gas-charging connection fitted seal in inner chamber.The intracavity sidewall of described piston body left end is provided with air extractor duct, and air extractor duct is positioned at the left end of left piston; The gas ducting be communicated with trailer gaholder is provided with in valve body side; The air extractor duct of piston body left end inner chamber is communicated with gas ducting.
Described valve member comprises sealing shroud and is fixed in valve seat bottom valve box, and be set with the valve of hollow in valve seat, valve upper end seals with valve port and docks, between valve seat and valve, be connected with valve spring; Body cavity outside valve port is communicated with braking joint, and the valve box inside valve port is communicated with inlet suction port, and valve cavity is communicated with as exhaust passage with described lower guide tube cavity.In the middle part of the lower port of described valve seat, by screw, dust-proof cushion is installed.
The principle of work of these three grades of variable pressure relay valves, see application number: the principle of work of the electrically controlled trailer emergency relay valve of 201410197504.7, its self-locking and the process of enabling after adding air pressure are prior art in this not go into detail.
Embodiment two: see three grades of variable pressure relay valve external members a kind of in Fig. 1-16, figure, comprise three grades of variable pressure relay valves and third gear change-over swith,
Three grades of described variable pressure relay valves comprise upper cover, valve body, relay piston, valve member, and are arranged on the gas-charging connection of upper cover and control joint, are arranged on the braking joint of body base;
Upper cover is connected with valve seal; In body cavity, sealing shroud is equipped with relay piston, forms positive pressure room between the upper surface of relay piston and upper cover,
The lower surface of relay piston is provided with two the step vizards and step surface second that diameter diminishes successively, the step surface third mated with step vizard, the step surface fourth of mating with step surface second is provided with in valve body, counter pressure air chamber first is formed at step vizard and step surface third diameter, between step surface second and step surface fourth, form counter pressure air chamber second, be provided with the pressure regulation interface first be communicated with counter pressure air chamber first, the pressure regulation interface second be communicated with counter pressure air chamber second in valve body side;
The valve inner be positioned at below relay piston is provided with valve box, valve member is positioned at valve box, top, valve box arranges valve port, and relay piston bottom arranges bottom conduit, and the lower edge diameter of this bottom conduit is less than the diameter of valve port for opening and closing control to valve member;
Described third gear change-over swith comprises upper cover body, lower base, install the conversion valve between lid and lower base, described lower base bottom is provided with an admission port and two air extractor ducts, two air extractor ducts are respectively by pipeline and described pressure regulation armatine, pressure modulating opening second connects, the top of lower base is outstanding cylinder table, described upper cover body bottom is the sleeve mated with cylinder table, in sleeve, swivel is installed, stretching out Long Circle plug in the middle part of this swivel lower surface is inserted into inside the Long Circle pit of the coupling of conversion valve upper surface, upper cover body is stretched out on swivel top,
Described conversion valve is between swivel lower surface and the upper surface of cylinder table, fit for sealing between conversion valve lower surface and the upper surface of cylinder table, this conversion valve is disc, conversion valve diameter mates with sleeve diameter, and conversion valve thickness mates with the distance between cylinder table upper surface, swivel lower surface;
The upper surface of described cylinder table is provided with and is communicated with two air extractor ducts with admission port respectively and is distributed on three pores in same semicircumference, and be provided with deflation hole at the upper surface center of cylinder table, this deflation hole passes lower base and is communicated with air,
The groove first of semicircular arc is provided with at the lower surface of conversion valve; The groove second of 1/4 circular arc is also provided with at the lower surface of conversion valve, flow guide recesses third is also provided with at the lower surface of conversion valve, this flow guide recesses third one end communication groove second, the circle centre position that the other end is positioned at conversion valve lower surface is corresponding with the deflation hole of cylinder table upper surface, groove first and groove second positioned opposite, groove first and groove second form circular annular region in rotary course to be had overlapping with three pores of cylinder table upper surface.
For piston area coordinates between swivel lateral surface with sleeve medial surface, the plug inside of swivel bottom is spring cavity, is provided with spring in spring cavity inside; The lower surface of described swivel is provided with annular groove, is provided with the upper pore penetrating conversion valve to top in described groove first, and on this, pore is communicated with annular groove inside; What swivel top was downward is provided with several retainer spring chambeies, and inside is provided with the retainer spring of end band ball, the upper surface in the sleeve of upper cover body is provided with the location hole of coupling; Be provided with hermetically-sealed construction between swivel upper side and upper cover body internal face, the internal face of cylinder table side and sleeve lower end is provided with hermetically-sealed construction; Be connected by screw between upper cover body and lower base; Be provided with at the sidepiece of upper cover body the gear display disc that level stretches out, the part that upper cover body is stretched out on swivel top is provided with the knob of band instruction.
The upside of upper cover is provided with inflation tube chamber, and gas-charging connection is positioned at one end of inflation tube chamber, and the other end sealing of inflation tube chamber is fixed with plug, controls joint and is connected to inflation tube chamber sidewall; At appendix cavity inner sleeve, piston body is housed, between piston body and plug, is connected with thrust spring; Described piston body is provided with the left piston near gas-charging connection and the right piston near plug, when gas-charging connection is inflated, only there are left piston and appendix cavity wall to seal when contacting and reset, only to have right piston seal with inflation tube chamber and contact, further, during inflation, right piston right piston when making control joint and upper cover inner space and reset that moves to right moves to left control joint and upper cover cavity is isolated; The left end of described piston body arranges inner chamber, is set with the check valve with gas-charging connection fitted seal in inner chamber; The intracavity sidewall of described piston body left end is provided with air extractor duct, and air extractor duct is positioned at the left end of left piston; The gas ducting be communicated with trailer gaholder is provided with in valve body side; The air extractor duct of piston body left end inner chamber is communicated with gas ducting.
Described valve member comprises sealing shroud and is fixed in valve seat bottom valve box, and be set with the valve of hollow in valve seat, valve upper end seals with valve port and docks, between valve seat and valve, be connected with valve spring; Body cavity outside valve port is communicated with braking joint, and the valve box inside valve port is communicated with inlet suction port, and valve cavity is communicated with as exhaust passage with described lower guide tube cavity; In the middle part of the lower port of described valve seat, by screw, dust-proof cushion is installed.
These three grades of variable pressure relay valve external members, two of a three grades of relay valves counter pressure air chamber can be communicated with pressure regulation gas circuit or disconnect by change-over swith, thus realizes the control to the change working of three grades of relay valves, and structure is simple, and practical, reliability is high.
Claims (10)
1. three grades of variable pressure relay valves, comprise upper cover, valve body, relay piston, valve member, and are arranged on the gas-charging connection of upper cover and control joint, are arranged on the braking joint of body base; It is characterized in that: upper cover is connected with valve seal; In body cavity, sealing shroud is equipped with relay piston, forms positive pressure room between the upper surface of relay piston and upper cover,
The lower surface of relay piston is provided with two the step vizards and step surface second that diameter diminishes successively, the step surface third mated with step vizard, the step surface fourth of mating with step surface second is provided with in valve body, counter pressure air chamber first is formed at step vizard and step surface third diameter, between step surface second and step surface fourth, form counter pressure air chamber second, be provided with the pressure regulation interface first be communicated with counter pressure air chamber first, the pressure regulation interface second be communicated with counter pressure air chamber second in valve body side;
The valve inner be positioned at below relay piston is provided with valve box, valve member is positioned at valve box, top, valve box arranges valve port, and relay piston bottom arranges bottom conduit, and the lower edge diameter of this bottom conduit is less than the diameter of valve port for opening and closing control to valve member.
2. three grades of variable pressure relay valves according to claim 1, is characterized in that: the upside of upper cover is provided with inflation tube chamber, and gas-charging connection is positioned at one end of inflation tube chamber, and the other end sealing of inflation tube chamber is fixed with plug, control joint and are connected to inflation tube chamber sidewall; At appendix cavity inner sleeve, piston body is housed, between piston body and plug, is connected with thrust spring; Described piston body is provided with the left piston near gas-charging connection and the right piston near plug, when gas-charging connection is inflated, only there are left piston and appendix cavity wall to seal when contacting and reset, only to have right piston seal with inflation tube chamber and contact, further, during inflation, right piston right piston when making control joint and upper cover inner space and reset that moves to right moves to left control joint and upper cover cavity is isolated.
3. three grades of variable pressure relay valves according to claim 2, is characterized in that: the left end of described piston body arranges inner chamber, are set with the check valve with gas-charging connection fitted seal in inner chamber.
4. three grades of variable pressure relay valves according to claim 3, is characterized in that: the intracavity sidewall of described piston body left end is provided with air extractor duct, and air extractor duct is positioned at the left end of left piston; The gas ducting be communicated with trailer gaholder is provided with in valve body side; The air extractor duct of piston body left end inner chamber is communicated with gas ducting.
5. three grades of variable pressure relay valves according to claim 1, it is characterized in that: described valve member comprises sealing shroud and is fixed in valve seat bottom valve box, be set with the valve of hollow in valve seat, valve upper end seals with valve port and docks, between valve seat and valve, be connected with valve spring; Body cavity outside valve port is communicated with braking joint, and the valve box inside valve port is communicated with inlet suction port, and valve cavity is communicated with as exhaust passage with described lower guide tube cavity.
6. three grades of variable pressure relay valves according to claim 1, is characterized in that: in the middle part of the lower port of described valve seat, be provided with dust-proof cushion by screw.
7. three grades of variable pressure relay valve external members, comprise three grades of variable pressure relay valves and third gear change-over swith, it is characterized in that:
Three grades of described variable pressure relay valves comprise upper cover, valve body, relay piston, valve member, and are arranged on the gas-charging connection of upper cover and control joint, are arranged on the braking joint of body base;
Upper cover is connected with valve seal; In body cavity, sealing shroud is equipped with relay piston, forms positive pressure room between the upper surface of relay piston and upper cover,
The lower surface of relay piston is provided with two the step vizards and step surface second that diameter diminishes successively, the step surface third mated with step vizard, the step surface fourth of mating with step surface second is provided with in valve body, counter pressure air chamber first is formed at step vizard and step surface third diameter, between step surface second and step surface fourth, form counter pressure air chamber second, be provided with the pressure regulation interface first be communicated with counter pressure air chamber first, the pressure regulation interface second be communicated with counter pressure air chamber second in valve body side;
The valve inner be positioned at below relay piston is provided with valve box, valve member is positioned at valve box, top, valve box arranges valve port, and relay piston bottom arranges bottom conduit, and the lower edge diameter of this bottom conduit is less than the diameter of valve port for opening and closing control to valve member;
Described third gear change-over swith comprises upper cover body, lower base, install the conversion valve between lid and lower base, described lower base bottom is provided with an admission port and two air extractor ducts, two air extractor ducts are respectively by pipeline and described pressure regulation armatine, pressure modulating opening second connects, the top of lower base is outstanding cylinder table, described upper cover body bottom is the sleeve mated with cylinder table, in sleeve, swivel is installed, stretching out Long Circle plug in the middle part of this swivel lower surface is inserted into inside the Long Circle pit of the coupling of conversion valve upper surface, upper cover body is stretched out on swivel top,
Described conversion valve is between swivel lower surface and the upper surface of cylinder table, fit for sealing between conversion valve lower surface and the upper surface of cylinder table, this conversion valve is disc, conversion valve diameter mates with sleeve diameter, and conversion valve thickness mates with the distance between cylinder table upper surface, swivel lower surface;
The upper surface of described cylinder table is provided with and is communicated with two air extractor ducts with admission port respectively and is distributed on three pores in same semicircumference, and be provided with deflation hole at the upper surface center of cylinder table, this deflation hole passes lower base and is communicated with air,
The groove first of semicircular arc is provided with at the lower surface of conversion valve; The groove second of 1/4 circular arc is also provided with at the lower surface of conversion valve, flow guide recesses third is also provided with at the lower surface of conversion valve, this flow guide recesses third one end communication groove second, the circle centre position that the other end is positioned at conversion valve lower surface is corresponding with the deflation hole of cylinder table upper surface, groove first and groove second positioned opposite, groove first and groove second form circular annular region in rotary course to be had overlapping with three pores of cylinder table upper surface.
8. three grades of variable pressure relay valve external members according to claim 7, is characterized in that: for piston area coordinates between swivel lateral surface with sleeve medial surface, and the plug inside of swivel bottom is spring cavity, is provided with spring in spring cavity inside; The lower surface of described swivel is provided with annular groove, is provided with the upper pore penetrating conversion valve to top in described groove first, and on this, pore is communicated with annular groove inside; What swivel top was downward is provided with several retainer spring chambeies, and inside is provided with the retainer spring of end band ball, the upper surface in the sleeve of upper cover body is provided with the location hole of coupling; Be provided with hermetically-sealed construction between swivel upper side and upper cover body internal face, the internal face of cylinder table side and sleeve lower end is provided with hermetically-sealed construction; Be connected by screw between upper cover body and lower base; Be provided with at the sidepiece of upper cover body the gear display disc that level stretches out, the part that upper cover body is stretched out on swivel top is provided with the knob of band instruction.
9. three grades of variable pressure relay valve external members according to claim 7, it is characterized in that: the upside of upper cover is provided with inflation tube chamber, gas-charging connection is positioned at one end of inflation tube chamber, and the other end sealing of inflation tube chamber is fixed with plug, controls joint and is connected to inflation tube chamber sidewall; At appendix cavity inner sleeve, piston body is housed, between piston body and plug, is connected with thrust spring; Described piston body is provided with the left piston near gas-charging connection and the right piston near plug, when gas-charging connection is inflated, only there are left piston and appendix cavity wall to seal when contacting and reset, only to have right piston seal with inflation tube chamber and contact, further, during inflation, right piston right piston when making control joint and upper cover inner space and reset that moves to right moves to left control joint and upper cover cavity is isolated; The left end of described piston body arranges inner chamber, is set with the check valve with gas-charging connection fitted seal in inner chamber; The intracavity sidewall of described piston body left end is provided with air extractor duct, and air extractor duct is positioned at the left end of left piston; The gas ducting be communicated with trailer gaholder is provided with in valve body side; The air extractor duct of piston body left end inner chamber is communicated with gas ducting.
10. three grades of variable pressure relay valves according to claim 7, it is characterized in that: described valve member comprises sealing shroud and is fixed in valve seat bottom valve box, be set with the valve of hollow in valve seat, valve upper end seals with valve port and docks, between valve seat and valve, be connected with valve spring; Body cavity outside valve port is communicated with braking joint, and the valve box inside valve port is communicated with inlet suction port, and valve cavity is communicated with as exhaust passage with described lower guide tube cavity; In the middle part of the lower port of described valve seat, by screw, dust-proof cushion is installed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700873.3A CN104627156B (en) | 2014-11-28 | 2014-11-28 | Three-level pressure transformation relay valve and three-level pressure transformation relay valve kit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410700873.3A CN104627156B (en) | 2014-11-28 | 2014-11-28 | Three-level pressure transformation relay valve and three-level pressure transformation relay valve kit thereof |
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| Publication Number | Publication Date |
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| CN104627156A true CN104627156A (en) | 2015-05-20 |
| CN104627156B CN104627156B (en) | 2017-04-12 |
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| CN201410700873.3A Expired - Fee Related CN104627156B (en) | 2014-11-28 | 2014-11-28 | Three-level pressure transformation relay valve and three-level pressure transformation relay valve kit thereof |
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| CN108137026A (en) * | 2015-12-19 | 2018-06-08 | 威伯科有限公司 | For improving the device of the exhaust velocity of pneumatic regulating valve |
| CN111674375A (en) * | 2020-05-26 | 2020-09-18 | 中国十七冶集团有限公司 | Automatic control device of pneumatic brake |
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| CN111674375A (en) * | 2020-05-26 | 2020-09-18 | 中国十七冶集团有限公司 | Automatic control device of pneumatic brake |
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| Publication number | Publication date |
|---|---|
| CN104627156B (en) | 2017-04-12 |
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