CN108238032B - Differential pressure average valve - Google Patents
Differential pressure average valve Download PDFInfo
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- CN108238032B CN108238032B CN201810230119.6A CN201810230119A CN108238032B CN 108238032 B CN108238032 B CN 108238032B CN 201810230119 A CN201810230119 A CN 201810230119A CN 108238032 B CN108238032 B CN 108238032B
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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
- B60T15/36—Other control devices or valves characterised by definite functions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Transportation (AREA)
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- Check Valves (AREA)
Abstract
The invention relates to a differential pressure average valve, and belongs to the technical field of vehicle braking. The differential pressure average valve comprises a valve body assembly, an upper body assembly and an inflation valve guide sleeve; the valve body assembly comprises a valve body and a differential pressure valve cover, wherein two check valve cavities, a two-way valve cavity and an average valve cavity are formed in the valve body, and are respectively communicated with the two-way valve; the upper body assembly is connected with the valve body assembly, the inflation valve guide sleeve is connected with the upper body assembly, the inflation valve is surrounded by the upper body assembly and the inflation valve guide sleeve, the inflation valve is communicated with the average valve, the two-way valve is communicated with the inflation valve, and the output of the two-way valve is used as the input of the inflation valve. According to the differential pressure average valve, the differential pressure valve and the average valve are modularized, the interface is designed according to the interface of the existing differential pressure valve, the functions of the differential pressure valve and the average valve are realized, the installation space is reasonably utilized, and the weight of a vehicle body is reduced.
Description
Technical Field
The invention relates to the technical field of vehicle braking, in particular to a differential pressure average valve.
Background
The original railway vehicle uses the two air spring pressures on opposite angles of the vehicle as the basis for calculating the braking force, and along with the improvement of the speed of the railway vehicle, the requirement on the braking force is higher and higher, and the requirement can not be met by only collecting the two air spring pressures on opposite angles as the basis for calculating the braking force, so that the measures adopted for solving the problem are as follows: the average valve is arranged between the two air springs of the same bogie, the two air spring pressures of the same bogie are arithmetically averaged and then output to the air automatic control unit, and the air automatic control unit outputs the averaged air spring pressures as the basis for calculating the braking force, so that the four air spring pressures on one vehicle are acquired, and the braking force accuracy is greatly improved.
The lower space of the railway vehicle is narrow, pipelines are various, the more the types of valves are, the more the occupied space is, the more the pipeline layout is difficult, and the time and the labor are wasted in installation, disassembly and maintenance. At present, a differential pressure valve and an average valve are arranged between two air springs of a bogie, so that the occupied space is relatively large, and the weight of a car body is also increased.
Disclosure of Invention
The invention aims to solve the problems, and provides a differential pressure average valve, which is modularized, wherein an interface is designed according to the interface of the existing differential pressure valve, and meanwhile, the functions of the differential pressure valve and the average valve are realized, so that the installation space is reasonably utilized, the weight of a vehicle body is reduced, and the problems are improved.
The invention is realized in the following way:
the embodiment of the invention provides a differential pressure average valve, which comprises a valve body assembly, an upper body assembly and an inflation valve guide sleeve;
the valve body assembly is internally provided with two check valve cavities, a two-way valve cavity and an average valve cavity, the central line of the check valve cavity is parallel to the central line of the average valve cavity, the two check valve cavities are internally provided with pressure difference check valve assemblies respectively, the central line of the two-way valve cavity is vertical to the central line of the check valve cavity, the two-way valve cavity is respectively communicated with the two check valve cavities, the two-way valve cavity is internally provided with a two-way valve guide sleeve and a two-way valve rod matched with the two-way valve guide sleeve, and the average valve cavity is internally provided with an average piston;
the upper body assembly is positioned at the opening end of the average valve cavity and seals the opening of the average valve cavity, the upper body assembly comprises an upper body and an average piston guide sleeve, the upper body is detachably connected with the valve body assembly, the average piston guide sleeve is positioned at one side of the upper body, which is close to the average valve cavity, the average piston guide sleeve is in interference fit with the upper body, the average piston is slidably penetrated in the average piston guide sleeve, the upper body is provided with an inflation valve cavity, the inflation valve cavity is positioned at one side, far away from the average valve cavity, of the upper body, the inflation valve cavity is communicated with the average valve cavity, the bidirectional valve cavity is communicated with the inflation valve cavity through an inflation pipeline, an inflation valve assembly is arranged in the inflation valve cavity, and the inflation valve assembly is in clearance fit with the upper body;
the inflation valve guide sleeve is positioned on one side of the upper body far away from the valve body assembly, the inflation valve guide sleeve is detachably connected with the upper body, and the inflation valve assembly slidably penetrates through the inflation valve guide sleeve.
In an alternative embodiment of the invention, the valve body assembly is provided with two air inlets and two air outlets, the two air inlets are in one-to-one correspondence with the two check valve cavities, the air inlets are communicated with the check valve cavities through air inlet channels, the average valve cavity is divided into an average cavity and a buffer cavity by the average piston, the average cavity is close to the air charging valve cavity relative to the buffer cavity, one air outlet is communicated with the average cavity, and the other air outlet is communicated with the buffer cavity.
In an alternative embodiment of the invention, the air inlet is provided with a stepped hole, the stepped hole is communicated with the air inlet channel, the diameter of the stepped hole is larger than that of the air inlet channel, a dust filtering sheet and a hole check ring are arranged in the stepped hole, and the hole check ring is matched with the valve body assembly and used for fixing the dust filtering sheet.
In an alternative embodiment of the invention, the valve body assembly comprises a valve body and a differential pressure valve cover, the check valve cavity is positioned in the valve body and extends along the height direction of the valve body, the differential pressure valve cover is detachably connected with the valve body and is used for sealing an opening of the check valve cavity, a check valve seat is arranged in the check valve cavity and divides the check valve cavity into a first cavity and a second cavity, the first cavity is close to the upper body assembly relative to the second cavity, the differential pressure check valve assembly is positioned in the second cavity, the differential pressure check valve assembly comprises a check valve rod and a check valve spring, two ends of the check valve spring are respectively connected with the check valve rod and the differential pressure, the check valve rod is slidably connected with the valve body, the check valve spring is used for driving the check valve rod to move towards the check valve seat, and one side of the check valve rod, which is close to the check valve seat, is provided with check valve rubber, and when the check valve rod is positioned in an initial state, the check valve rubber abuts against the check valve rod and the first cavity and the check valve seat are sealed by the first cavity and the check valve seat.
In an alternative embodiment of the invention, the two check valve chambers are a first check valve chamber and a second check valve chamber, respectively, the first chamber of the first check valve chamber being in communication with the second chamber of the second check valve chamber, the second chamber of the first check valve chamber being in communication with the first chamber of the second check valve chamber.
In an alternative embodiment of the present invention, the bidirectional valve rod divides the bidirectional valve cavity into a first direction chamber and a second direction chamber, the first direction chamber and the second direction chamber are respectively located at two ends of the bidirectional valve rod, the first direction chamber is communicated with the first check valve cavity, the second direction chamber is communicated with the second check valve cavity, when the bidirectional valve rod is located in the first direction chamber and the bidirectional valve rod seals the first direction chamber, pressure air can enter the inflation pipeline through the second direction chamber, and when the bidirectional valve rod is located in the second direction chamber and the bidirectional valve rod seals the second direction chamber, pressure air can enter the inflation pipeline through the first direction chamber.
In an alternative embodiment of the invention, an air valve seat is arranged in the air valve cavity, a sealing ring is sleeved on the outer surface of the air valve seat, the air valve seat is in clearance fit with the upper body, the air valve assembly is positioned between the air valve seat and the air valve guide sleeve, the air valve guide sleeve is provided with an air valve guide hole, the air valve assembly comprises an air valve rod and a valve rod end seat, the valve rod end seat is positioned at one end of the air valve, which is close to the air valve seat, the air valve rod is slidably arranged in the air valve guide hole, an air valve spring is sleeved on the outer surface of the air valve rod, the air valve spring is positioned between the valve rod end seat and the air valve guide sleeve, two ends of the air valve spring are respectively connected with the air valve guide sleeve and the valve rod end seat, the air valve spring is used for driving the air valve rod to move towards the air valve seat, one side of the valve rod end seat, which is close to the air valve seat, is provided with an air valve rubber assembly, and when the air valve end seat is initially positioned in an average air valve seat, the air valve seat is closed by the air valve seat, and the air valve seat is in an average air valve seat.
In an alternative embodiment of the invention, the inflation valve assembly is provided with a first exhaust hole extending along the axial direction of the inflation valve rod, the first exhaust hole penetrates through the inflation valve assembly, the outer surface of the inflation valve rod is sleeved with a sealing ring, the inflation valve rod is in sealing connection with the inflation valve guide sleeve, the first exhaust hole is used for eliminating back pressure in the inflation valve guide hole, the average piston is provided with a second exhaust hole extending along the axial direction of the average piston, the second exhaust hole penetrates through the average piston, and the second exhaust hole is communicated with the buffer chamber.
In an alternative embodiment of the invention, a throttling constriction is arranged in the charging pipeline, and the throttling constriction is used for adjusting the flow of gas in the charging pipeline.
In an alternative embodiment of the present invention, mounting portions are provided on both sides of the valve body assembly, the mounting portions are provided with mounting holes penetrating through the mounting portions in a width direction of the valve body assembly, and the mounting holes are used for fixing the valve body assembly by matching a fixing member with the mounting portions.
Compared with the prior art, the invention has the beneficial effects that:
according to the differential pressure average valve, the differential pressure valve and the average valve are modularized, the interface is designed according to the interface of the existing differential pressure valve, the functions of the differential pressure valve and the average valve are realized, the installation space is reasonably utilized, and the weight of a vehicle body is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a differential pressure averaging valve according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram showing a structure of a differential pressure averaging valve according to a second aspect of the present invention;
FIG. 3 is a schematic view showing the structure of a differential pressure averaging valve according to a third aspect of the present invention;
FIG. 4 is a schematic diagram showing the structure of a differential pressure averaging valve according to a fourth aspect of the present invention;
figure 5 is a cross-sectional view in the v-v direction of figure 3;
FIG. 6 is a cross-sectional view in the direction VI-VI of FIG. 4;
FIG. 7 is a schematic diagram showing the structure of a differential pressure averaging valve according to a fifth aspect of the present invention;
FIG. 8 is a cross-sectional view taken in direction VIII-VIII of FIG. 7;
FIG. 9 is a cross-sectional view in the direction IX-IX of FIG. 3;
fig. 10 is a sectional view in the x-x direction of fig. 3.
Icon: 100-differential pressure average valve; 1-a valve body assembly; 11-a valve body; 12-differential pressure valve cover; 13-a check valve cavity; 131-check valve seat; 132-check valve stem; 1321-check valve rubber; 133-check valve spring; 134-a first chamber; 135-a second chamber; 136-a first check valve cavity; 137-a second check valve cavity; 138-air inlet; 1381-an intake passage; 1382-stepped holes; 1383-dust-filtering sheet; 139-gas outlet; 14-a bidirectional valve cavity; 141-a bi-directional valve guide sleeve; 142-a bi-directional valve stem; 143-a first direction chamber; 144-second direction chamber; 15-an average valve cavity; 151-average piston; 1511-boss; 1512-piston rod; 152-average chamber; 153-buffer chamber; 1531-a first buffer chamber; 1532-a second buffer chamber; 1533-exhaust chamber; 154-a second vent; 155-steps; 156-piston bore; 16-a mounting portion; 161-mounting holes; 2-upper body assembly; 21-upper body; 22-average piston guide sleeve; 221-a third vent; 23-an inflatable valve cavity; 231-an inflatable valve seat; 232-an air-filled valve stem; 233-valve stem end seat; 234-an inflation valve spring; 235-an inflation valve rubber; 236-a first vent; 3-an inflation valve guide sleeve; 31-an inflation valve guide hole; 4-a retainer ring for holes; 5-an inflation line; 51-throttling shrinkage and blockage.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
First embodiment
Referring to fig. 1, the present embodiment provides a differential pressure averaging valve 100, which includes a valve body assembly 1, an upper body assembly 2, and an inflation valve guide sleeve 3.
In the embodiment, two check valve cavities 13, two bidirectional valve cavities 14 and an average valve cavity 15 are arranged in the valve body assembly 1, a check valve rod 132 is arranged in the check valve cavity 13 and forms a check valve, a bidirectional valve rod 142 is arranged in the bidirectional valve cavity 14 and forms a bidirectional valve, the two check valve cavities 13 are respectively communicated with two ends of the bidirectional valve cavity 14, compressed gas of different check valve cavities 13 is input into the bidirectional valve cavity 14 to drive the bidirectional valve rod 142 to move, and an average piston 151 is arranged in the average valve cavity 15 and forms an average valve; the upper body assembly 2 comprises an upper body 21 and an average piston guide sleeve 22, the upper body 21 is detachably connected with the valve body assembly 1, the upper body assembly 2 seals an opening of the average valve cavity 15, the average piston guide sleeve 22 is positioned on one side of the upper body 21, which is close to the average valve cavity 15, the average piston guide sleeve 22 is in interference fit with the upper body 21, the average piston 151 is slidably arranged in the average piston guide sleeve 22 in a penetrating manner, one side of the upper body 21, which is far away from the average valve cavity 15, is provided with an inflation valve cavity 23, the inflation valve cavity 23 is communicated with the average valve cavity 15, the bidirectional valve cavity 14 is communicated with the inflation valve cavity 23 through an inflation pipeline 5, the bidirectional valve cavity 14 is used for inputting pressure air into the inflation valve cavity 23, the inflation valve cavity 23 is internally provided with an inflation valve assembly and forms an inflation valve, an inflation valve rod 232 is in clearance fit with the upper body 21, and the inflation valve is used for inputting pressure air into the average valve cavity 15; the inflation valve guide sleeve 3 is positioned on one side of the upper body 21 far away from the valve body assembly 1, the inflation valve guide sleeve 3 is detachably connected with the upper body 21, the inflation valve rod 232 is slidably arranged in the inflation valve guide sleeve 3 in a penetrating manner, and the inflation valve guide sleeve 3 not only seals the opening of the inflation valve cavity 23, but also is used for guiding the inflation valve rod 232. The differential pressure average valve 100 integrates the differential pressure valve and the average valve into a whole, realizes the functions of the differential pressure valve and the average valve, reasonably utilizes the installation space, reduces the weight of the vehicle body and meets the requirements of users.
The specific structure of the respective components of the differential pressure average valve 100 and the positional relationship with each other are described in detail below.
The valve body assembly 1 comprises a valve body 11 and a differential pressure valve cover 12, wherein two check valve cavities 13, a two-way valve cavity 14 and an average valve cavity 15 are formed in the valve body 11, the check valve cavities 13 and the average valve cavity 15 are respectively positioned at two ends of the valve body 11 according to the structural size of the valve body 11, and the differential pressure valve cover 12 is positioned at one end of the valve body 11, which is close to the check valve cavities 13, and closes the opening of the check valve cavities 13.
In this embodiment, the valve body 11 has a rectangular parallelepiped structure, as shown in fig. 1-4, according to the size of the valve body 11, a vertical direction is defined as a height direction of the valve body 11, and on a horizontal plane, a larger size direction is a length direction, and a smaller size direction is a width direction. As shown in fig. 5, the check valve chambers 13 and the average valve chambers 15 are distributed at both ends of the valve body 11 in the height direction of the valve body 11, and the check valve chambers 13 and the average valve chambers 15 extend in the height direction of the valve body 11; the two check valve chambers 13 and the two-way valve chamber 14 are spaced apart along the length direction of the valve body 11, the two-way valve chamber 14 is located between the two check valve chambers 13, as shown in fig. 6, the two-way valve chamber 14 extends along the width direction of the valve body 11, and the two-way valve chamber 14 communicates with the two check valve chambers 13, respectively. For convenience of processing and manufacturing, the check valve cavity 13 and the average valve cavity 15 are both opened from the end of the valve body 11 in the height direction of the valve body 11, and the openings of the check valve cavity 13 and the average valve cavity 15 are respectively located at both ends of the valve body 11.
Mounting portions 16 are provided on both sides of the valve body 11 (distributed along the longitudinal direction of the valve body 11), and mounting holes 161 penetrating the mounting portions 16 in the width direction of the valve body 11 are provided in the mounting portions 16, and the mounting holes 161 are used for fitting fasteners (generally, refer to bolts) with the mounting portions 16 to fix the valve body 11 to a vehicle body. The position of the mounting portion 16 may be in various forms, and the user selects different positions according to actual situations.
As shown in fig. 7 and 8, the differential pressure valve cap 12 is detachably connected with the valve body 11, and the differential pressure valve cap 12 is used for closing the opening of the check valve cavity 13, a check valve seat 131 is arranged in the check valve cavity 13, the check valve seat 131 is connected with the valve body 11, and the check valve seat 131 divides the check valve cavity 13 into a first chamber 134 and a second chamber 135; the check valve cavity 13 is internally provided with a differential pressure check valve assembly, the differential pressure check valve assembly is located in the second chamber 135, the differential pressure check valve assembly comprises a check valve rod 132 and a check valve spring 133, two ends of the check valve spring 133 are respectively connected with the check valve rod 132 and the differential pressure valve cover 12, the check valve rod 132 is slidably connected with the valve body 11, the check valve spring 133 is used for driving the check valve rod 132 to move towards the check valve seat 131, one side, close to the check valve seat 131, of the check valve rod 132 is provided with a check valve rubber 1321, when the check valve rod 132 is located in an initial state, the check valve rod 132 is matched with the check valve seat 131 under the action of the check valve spring 133, and the check valve rubber 1321 is abutted against the check valve seat 131 and seals the first chamber 134 and the second chamber 135. The check valve cavity 13, the differential pressure valve cover 12 and the differential pressure check valve assembly cooperate to form a differential pressure check valve.
As shown in fig. 9 and 10, the two check valve chambers 13 are a first check valve chamber 136 and a second check valve chamber 137, respectively, the first chamber 134 of the first check valve chamber 136 communicates with the second chamber 135 of the second check valve chamber 137, and the second chamber 135 of the first check valve chamber 136 communicates with the first chamber 134 of the second check valve chamber 137. The two check valves 13 are connected in such a way that the two differential pressure check valves cooperate with each other.
As shown in fig. 1 and 8, the valve body 11 is provided with two air inlets 138, the two air inlets 138 are in one-to-one correspondence with the two check valve chambers 13, and the air inlets 138 are communicated with the check valve chambers 13 (second chambers 135) through an air inlet passage 1381. The air inlet 138 is provided with a stepped hole 1382, the stepped hole 1382 communicates with the air inlet passage 1381, the diameter of the stepped hole 1382 is larger than that of the air inlet passage 1381, a dust filter 1383 and a hole retainer ring 4 are arranged inside the stepped hole 1382, and the hole retainer ring 4 is matched with the valve body 11 and used for pressing the dust filter 1383 in the stepped hole 1382. The design of the dust filter 1383 ensures that the gas entering the check valve cavity 13 is clean, and the service life of parts in the check valve cavity 13 is prolonged.
When the air inlet 138 is connected with the pressure air, the pressure air enters the second chamber 135, the air pressure in the check valve cavity 13 is increased, the check valve rod 132 is far away from the check valve seat 131 under the action of the pressure air, the differential pressure check valve is opened, and the compressed air enters the first chamber 134 through the valve port of the check valve seat 131.
As shown in fig. 6, a bidirectional valve guide sleeve 141 and a bidirectional valve rod 142 which is matched with the bidirectional valve guide sleeve 141 are arranged in the bidirectional valve cavity 14, the bidirectional valve guide sleeve 141 is in sealing connection with the valve body 11, and the end part of the bidirectional valve guide sleeve 141 is fixed by a hole check ring 4. The bi-directional valve stem 142 is slidably coupled to the bi-directional valve guide 141, the bi-directional valve stem 142 separating the bi-directional valve cavity 14 into a first directional chamber 143 and a second directional chamber 144, the first directional chamber 143 and the second directional chamber 144 being positioned at opposite ends of the bi-directional valve stem 142, the first directional chamber 143 being in communication with the first check valve cavity 136 (referred to herein as the first chamber 134 of the first check valve cavity 136) and the second directional chamber 144 being in communication with the second check valve cavity 137 (referred to herein as the first chamber 134 of the second check valve cavity 137). When the bi-directional valve stem 142 is positioned within the first directional chamber 143 and the bi-directional valve stem 142 encloses the first directional chamber 143, pressurized air can be output through the second directional chamber 144; conversely, when the bi-directional valve stem 142 is positioned within the second directional chamber 144 and the bi-directional valve stem 142 encloses the second directional chamber 144, pressurized air can be output through the first directional chamber 143.
When the first check valve cavity 136 inputs pressure air, the pressure air enters the first direction chamber 143, so that the air pressure in the first chamber 134 is increased, and the bidirectional valve rod 142 is driven to move towards the second direction chamber 144; similarly, the second check valve chamber 137 is supplied with pressurized air in the same manner as the first check valve chamber 136. When the first check valve chamber 136 and the second check valve chamber 137 simultaneously input pressure air, the direction of movement of the bidirectional valve stem 142 depends on the difference between the pressures of the pressure air input from the two check valve chambers 13, and if the pressure of the pressure air input from the first check valve chamber 136 is greater than the pressure of the pressure air input from the second check valve chamber 137, the bidirectional valve stem 142 moves toward the second direction chamber 144, and vice versa.
An average piston 151 is arranged in the average valve cavity 15, the average piston 151 is connected with the valve body 11 in a sliding way, a sealing ring is sleeved on the surface of the average piston 151, and the average piston 151 is in sealing fit with the valve body 11. The average piston 151 divides the average valve chamber 15 into an average chamber 152 and a buffer chamber 153, the average chamber 152 being distant from the check valve chamber 13 with respect to the buffer chamber 153. The average valve cavity 15 is internally provided with two steps 155 and a piston hole 156, the average piston 151 is provided with two bosses 1511 and a piston rod 1512 which are matched with the average valve cavity 15, the outer surfaces of the bosses 1511 and the outer surfaces of the piston rod 1512 are respectively provided with sealing rings, the two bosses 1511 and the piston rod 1512 divide the buffer cavity 153 into a first buffer cavity 1531, a second buffer cavity 1532 and an exhaust cavity 1533, the first buffer cavity 1531 is close to the average cavity 152 relative to the exhaust cavity 1533, the first buffer cavity 1531 is communicated with the first check valve cavity 136, the second buffer cavity 1532 is communicated with the second check valve cavity 137 (as shown in fig. 9), and the exhaust cavity 1533 is communicated with the outside atmosphere.
The valve body 11 is provided with two air outlets 139, wherein one air outlet 139 is communicated with the average chamber 152, and the other air outlet 139 is communicated with the exhaust chamber 1533. The gas outlet 139 communicating with the average chamber 152 is for output, and the gas outlet 139 communicating with the exhaust chamber 1533 is for exhaust.
The upper body assembly 2 is located at the open end of the average valve chamber 15, and the upper body assembly 2 closes the opening of the average valve chamber 15. The upper body assembly 2 comprises an upper body 21 and an average piston guide sleeve 22, the upper body 21 is detachably connected with the valve body 11, the average piston guide sleeve 22 is positioned on one side of the upper body 21, which is close to the average valve cavity 15, the average piston guide sleeve 22 is in interference fit with the upper body 21, an average piston 151 is slidably arranged in the average piston guide sleeve 22 in a penetrating manner, and the average valve is formed by the average piston guide sleeve 22, the upper body 21, the average valve cavity 15 and the average piston 151. The upper body 21 is provided with a through hole penetrating through the upper body 21, one side of the upper body 21 is embedded with an average piston guide sleeve 22, and the average piston guide sleeve 22 is positioned in the average chamber 152; the other side is provided with an inflating valve cavity 23, the inflating valve cavity 23 is communicated with the average valve cavity 15, and the bidirectional valve cavity 14 is communicated with the inflating valve cavity 23 through an inflating pipeline 5; an inflation valve assembly is arranged in the inflation valve cavity 23, and the inflation valve assembly is in clearance fit with the upper body 21.
The inflation valve guide sleeve 3 is positioned on one side of the upper body 21 far away from the valve body assembly 1, the inflation valve guide sleeve 3 is detachably connected with the upper body 21, and the inflation valve assembly is slidably arranged in the inflation valve guide sleeve 3 in a penetrating manner. An air charging valve seat 231 is arranged in the air charging valve cavity 23, a sealing ring is sleeved on the outer surface of the air charging valve seat 231, the air charging valve seat 231 is in clearance fit with the upper body 21, and the outer surface of the air charging valve seat 231 is in sealing fit with the inner surface of the upper body 21 through the sealing ring. The inflation valve seat 231, the inflation valve cavity 23, the inflation valve assembly and the inflation valve guide sleeve 3 form an inflation valve. The inflation valve assembly is positioned between the inflation valve seat 231 and the inflation valve guide sleeve 3, and the inflation valve guide sleeve 3 is provided with an inflation valve guide hole 31; the inflation valve assembly comprises an inflation valve rod 232 and a valve rod end seat 233, the valve rod end seat 233 is located at one end, close to the inflation valve seat 231, of the inflation valve rod 232, the inflation valve rod 232 is slidably arranged in the inflation valve guide hole 31, an inflation valve spring 234 is sleeved on the outer surface of the inflation valve rod 232, the inflation valve spring 234 is located between the valve rod end seat 233 and the inflation valve guide sleeve 3, two ends of the inflation valve spring 234 are respectively connected with the inflation valve guide sleeve 3 and the valve rod end seat 233, the inflation valve spring 234 is used for driving the inflation valve rod 232 to move towards the inflation valve seat 231, an inflation valve rubber 235 is arranged on one side, close to the inflation valve seat 231, of the valve rod end seat 233, and when the inflation valve assembly is located in an initial state, the inflation valve rubber 235 abuts against the inflation valve seat 231, and the inflation valve cavity 23 is sealed with the average valve cavity 15.
It should be noted that in the present embodiment, the connection between the differential pressure valve cover 12 and the valve body 11, the connection between the upper body 21 and the valve body 11, and the connection between the inflation valve guide 3 and the upper body 21 are all provided with sealing rings, so that the overall tightness of the differential pressure average valve 100 is good.
The bidirectional valve cavity 14 is communicated with the inflating valve cavity 23 through the inflating pipeline 5, so that the pressure air output by the bidirectional valve cavity 14 is conveniently conveyed to the inflating valve cavity 23, and the pressure of the air entering the average chamber 152 is increased. The provision of the inflation valve chamber 23 increases the pressure of the gas output from the averaging chamber 152, serving to inflate the averaging valve. In order to adjust the flow of the gas in the gas filling pipeline 5, a throttling shrinkage plug 51 is arranged on the gas filling pipeline 5, and the throttling shrinkage plug 51 is positioned at the joint of the upper body 21 and the gas filling valve guide sleeve 3, so that the installation and the replacement are convenient.
The inflation valve assembly is provided with a first exhaust hole 236 extending along the axial direction of the inflation valve rod 232, the first exhaust hole 236 penetrates through the inflation valve assembly, the outer surface of the inflation valve rod 232 is sleeved with a sealing ring, the inflation valve rod 232 is in sealing connection with the inflation valve guide sleeve 3, and the first exhaust hole 236 is used for eliminating back pressure in the inflation valve guide hole 31. The average piston 151 is provided with a second exhaust hole 154 extending in an axial direction of the average piston 151, the second exhaust hole 154 penetrating the average piston 151, the second exhaust hole 154 communicating with the buffer chamber 153. When the average valve is opened, air in the average chamber 152 is discharged into the atmosphere from the air outlet 139 at the bottom of the average piston 151 through the second air discharge hole 154.
On the upper body assembly 2, a gap is formed between the average piston guide sleeve 22 and the inflation valve seat 231, the average piston guide sleeve 22 is provided with a plurality of third exhaust holes 221, when the inflation valve is opened, the inflation valve assembly is far away from the inflation valve seat 231, pressure air in the inflation valve cavity 23 enters the average cavity 152 through a valve port of the inflation valve seat 231, and the third exhaust holes 221 are arranged to accelerate the flow of the pressure air, so that the pressure air in the inflation valve cavity 23 can quickly enter the average cavity 152.
The working principle of the embodiment of the invention is as follows:
the operating conditions of the differential pressure averaging valve 100 include two types:
1. the air spring pressures at two sides are arithmetically averaged and output:
AS shown in fig. 10 and 6, the bi-directional valve has the larger pressure of the first check valve chamber 136 (AS 1) and the second check valve chamber 137 (AS 2) AS the output, and the output (ASmax) AS the input of the charge valve. When the pressure of the first check valve chamber 136 (AS 1) is greater than the pressure of the second check valve chamber 137 (AS 2), the bi-directional valve moves toward the second chamber 135, closing the second chamber 135, with the pressurized air of the first chamber 134 AS output, asmax=as1; similarly, when AS2 is greater than AS1, the bi-directional valve moves toward the first chamber 134, closing the first chamber 134, with AS2 AS an output from the second chamber 135, i.e., asmax=as2. Fig. 10 shows a state that when the pressures of the average piston 151 reach equilibrium, the average piston 151 moves upward to open the charging valve assembly (AS shown in fig. 9, the first check valve cavity 136 and the second check valve cavity 137 are respectively communicated with the buffer chamber 153), at this time, ASmax charges the average chamber 152, AS the pressure FV of the average chamber 152 gradually increases, the average piston 151 moves downward until the charging valve is closed (the charging valve rubber 235 abuts against the charging valve seat 231), at this time, the air pressures on the upper and lower sides of the average piston 151 are equal, the average piston 151 reaches equilibrium, and fv= (as1+as2)/2. When the pressures AS1, AS2 decrease, the average piston 151 moves downward under the action of FV pressure, the average valve opens, pressurized air in the average chamber 152 is vented from the bottom of the average piston 151 through the vent hole in the center of the average piston 151, and AS FV gradually decreases, the average piston 151 moves upward until the average valve closes, at which point the average piston 151 reaches equilibrium, fv= (as1+as2)/2.
2. When the pressure difference of the air springs at two sides exceeds a specified value, the air springs at two sides are communicated with each other:
the differential pressure check valve is normally pressed against the valve seat by the check valve spring 133, and when the air pressure in the AS1 chamber increases and the pressure difference between AS1 and AS2 exceeds a prescribed value, the first differential pressure check valve (the differential pressure check valve composed of the first check valve chamber 136) is pushed open by AS1, and the pressure air in the AS1 chamber flows into the AS2 chamber until the pressure difference between AS1 and AS2 is smaller than the prescribed value, and the differential pressure check valve is closed. Similarly, if the air pressure in the AS2 chamber increases and the pressure difference between the AS1 and the AS2 exceeds a predetermined value, the second differential pressure check valve (differential pressure check valve constituted by the second check valve chamber 137) is pushed open by the AS2, and the pressure air in the AS2 chamber flows into the AS1 chamber. Therefore, when the pressure difference of the air springs at two sides exceeds a specified value, the pressure difference check valve is opened, the air springs at two sides are communicated, and the air with the higher pressure flows into the air with the lower pressure, so that the vehicle body is not excessively inclined, and the balance state is maintained.
The embodiment of the invention has the beneficial effects that:
the differential pressure average valve 100 has the functions of general inflation, pressure maintaining and exhaust, and has the following characteristics: the pressure of the air springs at two sides is arithmetically averaged and then output; when the pressure difference of the air springs at two sides exceeds a fixed value, the air springs at two sides are communicated, so that the vehicle body is not excessively inclined, and balance is maintained. The differential pressure average valve 100 integrates the differential pressure valve and the average valve, reasonably utilizes the installation space, lightens the weight of the vehicle body and meets the requirements of users.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The differential pressure average valve is characterized by comprising a valve body assembly, an upper body assembly and an inflation valve guide sleeve;
the valve body assembly is internally provided with two check valve cavities, a two-way valve cavity and an average valve cavity, the central line of the check valve cavity is parallel to the central line of the average valve cavity, the two check valve cavities are internally provided with pressure difference check valve assemblies respectively, the central line of the two-way valve cavity is vertical to the central line of the check valve cavity, the two-way valve cavity is respectively communicated with the two check valve cavities, the two-way valve cavity is internally provided with a two-way valve guide sleeve and a two-way valve rod matched with the two-way valve guide sleeve, and the average valve cavity is internally provided with an average piston;
the upper body assembly is positioned at the opening end of the average valve cavity and seals the opening of the average valve cavity, the upper body assembly comprises an upper body and an average piston guide sleeve, the upper body is detachably connected with the valve body assembly, the average piston guide sleeve is positioned at one side of the upper body, which is close to the average valve cavity, the average piston guide sleeve is in interference fit with the upper body, the average piston is slidably penetrated in the average piston guide sleeve, the upper body is provided with an inflation valve cavity, the inflation valve cavity is positioned at one side, far away from the average valve cavity, of the upper body, the inflation valve cavity is communicated with the average valve cavity, the bidirectional valve cavity is communicated with the inflation valve cavity through an inflation pipeline, an inflation valve assembly is arranged in the inflation valve cavity, and the inflation valve assembly is in clearance fit with the upper body;
the inflation valve guide sleeve is positioned on one side of the upper body far away from the valve body assembly, the inflation valve guide sleeve is detachably connected with the upper body, and the inflation valve assembly is slidably arranged in the inflation valve guide sleeve in a penetrating manner;
the valve body assembly is provided with two air inlets and two air outlets, the two air inlets are in one-to-one correspondence with the two check valve cavities, the air inlets are communicated with the check valve cavities through air inlet channels, the average valve cavity is divided into an average cavity and a buffer cavity by the average piston, the average cavity is close to the air charging valve cavity relative to the buffer cavity, one air outlet is communicated with the average cavity, and the other air outlet is communicated with the buffer cavity;
the air charging pipeline is internally provided with a throttling shrinkage plug which is used for adjusting the flow of air in the air charging pipeline.
2. The differential pressure averaging valve as defined in claim 1, wherein said intake port is provided with a stepped bore, said stepped bore communicating with said intake passage, said stepped bore having a diameter greater than a diameter of said intake passage, said stepped bore being internally provided with a dust filter and a bore retainer, said bore retainer cooperating with said valve body assembly and being adapted to secure said dust filter.
3. The differential pressure averaging valve of claim 1, wherein the valve body assembly includes a valve body and a differential pressure valve cap, the check valve cavity is located within the valve body and extends in a height direction of the valve body, the differential pressure valve cap is detachably connected with the valve body and is used for closing an opening of the check valve cavity, a check valve seat is arranged within the check valve cavity, the check valve seat separates the check valve cavity into a first chamber and a second chamber, the first chamber is close to the upper body assembly relative to the second chamber, the differential pressure check valve assembly is located within the second chamber, the differential pressure check valve assembly includes a check valve rod and a check valve spring, two ends of the check valve spring are respectively connected with the check valve rod and the differential pressure valve cap, the check valve rod is slidably connected with the valve body, the check valve spring is used for driving the check valve rod to move towards the check valve seat, one side of the check valve rod, which is close to the check valve seat, is provided with a check valve rubber, and when the check valve rod is located in an initial state, the check valve rod is abutted against the first chamber and the check valve seat.
4. The differential pressure averaging valve of claim 3, wherein the two check valve chambers are a first check valve chamber and a second check valve chamber, respectively, the first chamber of the first check valve chamber being in communication with the second chamber of the second check valve chamber, the second chamber of the first check valve chamber being in communication with the first chamber of the second check valve chamber.
5. The differential pressure averaging valve of claim 4, wherein the bi-directional valve stem divides the bi-directional valve cavity into a first directional chamber and a second directional chamber, the first directional chamber and the second directional chamber being positioned at opposite ends of the bi-directional valve stem, respectively, the first directional chamber being in communication with the first check valve cavity and the second directional chamber being in communication with the second check valve cavity, pressure air being able to enter the inflation line via the second directional chamber when the bi-directional valve stem is positioned within the first directional chamber and the bi-directional valve stem closes the first directional chamber, and pressure air being able to enter the inflation line via the first directional chamber when the bi-directional valve stem is positioned within the second directional chamber and the bi-directional valve stem closes the second directional chamber.
6. The differential pressure average valve according to claim 1, wherein an air valve seat is arranged in the air valve cavity, a sealing ring is sleeved on the outer surface of the air valve seat, the air valve seat is in clearance fit with the upper body, the air valve assembly is positioned between the air valve seat and the air valve guide sleeve, the air valve guide sleeve is provided with an air valve guide hole, the air valve assembly comprises an air valve rod and a valve rod end seat, the valve rod end seat is positioned at one end of the air valve, which is close to the air valve seat, the air valve rod is slidably arranged in the air valve guide hole, an air valve spring is sleeved on the outer surface of the air valve rod, the air valve spring is positioned between the valve rod end seat and the air valve guide sleeve, two ends of the air valve spring are respectively connected with the air valve guide sleeve and the valve rod end seat, the air valve spring is used for driving the air valve rod to move towards the air valve seat, one side, close to the air valve seat, of the valve rod end seat is provided with an air valve rubber, the air valve rod is slidably arranged in the air valve guide hole, and the air valve assembly is in an air valve cavity when the air valve is in an initial state, and the air valve assembly is in a closed state, and the air valve seat is in an average valve state.
7. The differential pressure averaging valve of claim 6, wherein the inflation valve assembly defines a first vent extending axially along the inflation valve stem, the first vent extending through the inflation valve assembly, a sealing ring sleeved on an outer surface of the inflation valve stem, the inflation valve stem sealingly coupled to the inflation valve guide sleeve, the first vent configured to eliminate back pressure within the inflation valve guide bore, the averaging piston defines a second vent extending axially along the averaging piston, the second vent extending through the averaging piston, the second vent communicating with the buffer chamber.
8. The differential pressure averaging valve as defined in claim 1, wherein mounting portions are provided on both sides of the valve body assembly, the mounting portions being provided with mounting holes penetrating the mounting portions in a width direction of the valve body assembly, the mounting holes being for a fixing member to be fitted with the mounting portions to fix the valve body assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810230119.6A CN108238032B (en) | 2018-03-20 | 2018-03-20 | Differential pressure average valve |
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| CN201810230119.6A CN108238032B (en) | 2018-03-20 | 2018-03-20 | Differential pressure average valve |
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| CN108238032A CN108238032A (en) | 2018-07-03 |
| CN108238032B true CN108238032B (en) | 2023-07-04 |
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| CN114407858A (en) * | 2022-01-20 | 2022-04-29 | 浙江瑞立空压装备有限公司 | Averaging valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107097770A (en) * | 2017-06-27 | 2017-08-29 | 眉山中车制动科技股份有限公司 | A kind of passenger train air brake valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1302930A (en) * | 1970-10-16 | 1973-01-10 | ||
| US4339155A (en) * | 1980-10-08 | 1982-07-13 | American Standard Inc. | Control valve arrangement for combined brake and air reservoir device |
| US4842341A (en) * | 1988-05-12 | 1989-06-27 | General Signal Corporation | Brake pipe pressure modulating valve device |
| CN1187438A (en) * | 1996-12-23 | 1998-07-15 | 西屋气刹车公司 | Electro-pneumatic valve control |
| US6227521B1 (en) * | 1999-12-30 | 2001-05-08 | Westinghouse Air Brake Company | Graduated release valve |
| DE60103528T2 (en) * | 2001-07-02 | 2005-06-16 | Westinghouse Air Brake Technologies Corp. | Apparatus and method for pneumatically controlled graduated brake pressure reduction for a freight train braking system |
| US6709070B1 (en) * | 2003-05-20 | 2004-03-23 | New York Air Brake Corporation | Unidirectional stability choke for a brake control valve |
| DE102005060587A1 (en) * | 2005-12-17 | 2007-07-05 | Serto Jacob Gmbh | Differential pressure valve |
| CN201099240Y (en) * | 2007-11-01 | 2008-08-13 | 万安集团诸暨汽车零部件有限公司 | Double chamber load-sensing proportion valve |
| CN201511958U (en) * | 2009-11-09 | 2010-06-23 | 天津机辆轨道交通装备有限责任公司 | Air control valve |
| CN201849484U (en) * | 2010-11-15 | 2011-06-01 | 中国铁道科学研究院机车车辆研究所 | Empty and load valve for rail transit vehicle brake systems |
| CN202579791U (en) * | 2012-03-29 | 2012-12-05 | 常州朗锐凯迩必减振技术有限公司 | Differential pressure valve for air spring |
| CN107289150B (en) * | 2017-08-16 | 2019-08-27 | 中车青岛四方车辆研究所有限公司 | A kind of more gas circuits are averaged valve |
| CN208085698U (en) * | 2018-03-20 | 2018-11-13 | 眉山中车制动科技股份有限公司 | Pressure difference is averaged valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107097770A (en) * | 2017-06-27 | 2017-08-29 | 眉山中车制动科技股份有限公司 | A kind of passenger train air brake valve |
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