CN111089190A - Differential pressure valve and rail vehicle - Google Patents
Differential pressure valve and rail vehicle Download PDFInfo
- Publication number
- CN111089190A CN111089190A CN202010004809.7A CN202010004809A CN111089190A CN 111089190 A CN111089190 A CN 111089190A CN 202010004809 A CN202010004809 A CN 202010004809A CN 111089190 A CN111089190 A CN 111089190A
- Authority
- CN
- China
- Prior art keywords
- differential pressure
- valve
- spring
- pressure valve
- plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
- F16K17/065—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure with differential piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a differential pressure valve which comprises two overflow valves which have the same structure and are reversely connected in parallel, wherein each overflow valve comprises a plug screw, a valve port, a spring, a regulating part and a pressing part; the screw plug is arranged at the top of the overflow valve, and a through hole is formed in the screw plug; the valve port is arranged at the bottom of the overflow valve, and a valve core is arranged on the inner side wall of the valve port; the spring is compressed between the screw plug and the valve core; the adjusting piece is rotatably arranged in the through hole of the screw plug; one end of the pressing piece is connected with the adjusting piece, and the other end of the pressing piece is connected with the spring; the pressing piece moves towards the spring under the action of the rotating motion of the adjusting piece to compress the spring. The problem of among the prior art differential pressure valve's repair process loaded down with trivial details, waste time and energy is solved.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a differential pressure valve and a railway vehicle.
Background
In the running process of a railway vehicle, due to the difference of air charging and discharging time and speed of each air spring, unsmooth lines, different effective lengths of height control rods of each height control valve, unbalanced vehicle load and the like, the pressures in the air springs on the left side and the right side of a static or running bogie are different, the vertical loads on the two sides of the bogie are unbalanced, the anti-derailment capacity of a load reduction side is reduced, and in order to ensure safe and stable running of the vehicle and prevent derailment, a differential pressure valve is adopted in an air spring suspension system and is an effective measure.
The prior art discloses a differential pressure valve, two overflow valves are installed in a valve cavity of the differential pressure valve, a valve port is formed at the bottom of each overflow valve, a plug screw is installed at the top of each overflow valve, a valve core is attached to the inner side wall of each valve port, and a spring with a certain pre-compression amount is arranged between each valve core and the corresponding plug screw. The differential pressure valve with the structure has a certain adjusting effect on the pressure difference of the air springs on the left side and the right side.
However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
along with the long-time use of differential pressure valve, can lead to the theoretical pressure differential of differential pressure valve to diminish, above-mentioned differential pressure valve all need follow the car with the differential pressure valve and dismantle, return the factory maintenance and change loaded down with trivial details processes such as spare part of differential pressure valve if wanting to realize the adjustment of theoretical pressure differential, has caused the repair process of differential pressure valve loaded down with trivial details from this, the problem of wasting time and energy.
Disclosure of Invention
The invention aims to provide a differential pressure valve, which solves the problems that the repair process of the differential pressure valve in the prior art is complicated, and time and labor are wasted.
In order to realize the purpose, the invention adopts the following technical scheme:
the utility model provides a differential pressure valve, includes the valve body, is equipped with the valve pocket in the valve body, be provided with the overflow valve of two the same and reverse parallelly connected intercommunications of structure in the valve pocket, the overflow valve includes:
the screw plug is arranged at the top of the overflow valve, and a through hole is formed in the screw plug;
the valve port is arranged at the bottom of the overflow valve, and a valve core is arranged on the inner side wall of the valve port;
the spring is compressed between the screw plug and the valve core;
and one end of the adjusting device is rotatably arranged in the through hole of the screw plug, the other end of the adjusting device is connected with the spring, and the spring is compressed under the action of the rotating motion of the adjusting device.
Preferably, the adjusting means comprises:
the adjusting piece is rotatably arranged in the through hole of the screw plug;
one end of the pressing piece is connected with the adjusting piece, and the other end of the pressing piece is connected with the spring; the pressing piece moves towards the spring under the action of the rotating motion of the adjusting piece to compress the spring.
Preferably, the pressing member is connected with the adjusting member through threads.
Preferably, a plug screw cavity with an opening at one end is arranged on the plug screw and is communicated with the through hole of the plug screw; the inner wall of the plug screw cavity is provided with a guide groove, and the guide groove extends towards the opening direction of the plug screw cavity; the pressing piece is positioned in the cavity of the screw plug, and an anti-rotation guide piece is arranged on the pressing piece; the rotation-preventing guide is inserted into the guide groove, and the rotation-preventing guide is slidable in a direction in which the guide groove extends.
Preferably, the adjusting piece is provided with a limiting flange, and the limiting flange is connected with the upper end face of the plug screw cavity.
Preferably, a sealing groove is formed in the inner side wall of the through hole of the screw plug, a sealing ring is installed in the sealing groove, and the sealing ring is sleeved outside the adjusting piece.
Preferably, the adjusting piece is in threaded connection with the plug screw, the pressing piece is provided with a groove, and the end part of the adjusting piece is movably arranged in the groove.
Preferably, a sealing ring is arranged between the pressing piece and the plug screw, an annular sealing groove is formed in the pressing piece, and the sealing ring is installed in the sealing groove.
Preferably, the lower end face of the pressing piece is provided with an annular groove, and the upper end part of the spring is clamped in the groove.
Preferably, one end of the adjusting piece is provided with a fastening piece, the fastening piece is in threaded connection with the adjusting piece, and the adjusting piece is connected with the screw plug through the fastening piece.
The railway vehicle comprises a bogie, wherein a differential pressure valve is arranged on the bogie and is any one of the differential pressure valves.
Compared with the prior art, the invention has the advantages and positive effects that:
this application has designed a differential pressure valve, through be provided with adjusting device on the plug screw of differential pressure valve, and the rotatable setting in the through-hole of plug screw of adjusting device's one end, adjusting device's the other end meets with the spring, removes and realizes the compression to the spring towards the spring under adjusting device's rotary motion effect from this. So when the differential pressure valve is longer because of the live time, lead to its theoretical pressure differential to diminish and need be to its adjustment, can realize further compression to the spring through rotating adjusting device, accomplish the adjustment to the spring pre-compaction volume from this for the differential pressure valve obtains repairing, and need not disassemble the differential pressure valve, also need not to change the spare part of differential pressure valve. Therefore, the theoretical differential pressure of the differential pressure valve can be adjusted on the vehicle body, and complicated processes of disassembling the differential pressure valve from the vehicle, returning to a factory for maintenance and the like are avoided. Therefore, the problems that in the prior art, the repair process of the differential pressure valve is complicated, and time and labor are wasted are solved.
Drawings
FIG. 1 is a schematic structural view of a differential pressure valve in embodiment 1;
FIG. 2 is a schematic sectional view showing the entire structure of the differential pressure valve in example 1;
FIG. 3 is a schematic sectional view of the structure of a plug screw 4 in embodiment 1;
FIG. 4 is an enlarged view of the structure at A in FIG. 2;
FIG. 5 is a partial structural view of a differential pressure valve in embodiment 2;
in the above figures: 1. a valve body; 2. a valve seat; 3. an overflow valve;
4. a plug screw; 41. a through hole; 42. a plug screw cavity 43, a guide groove; 44. a sealing groove; 45. a seal ring; 5. a spring; 6. a valve core; 7. a valve port; 8. a guide bar;
9. an adjustment member; 91. a limiting flange; 92. a rotating groove;
10. a compression member; 101. an anti-rotation guide; 102. a groove;
11. a fastener; 12. a first cavity section; 13. a second cavity section; 14. a third chamber section; 15. and a fourth cavity part.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", "first", "second", etc. indicate orientations or positional relationships based on the positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present application, the terms "mounted," "connected," "fixed," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or through an intermediary profile. "joined" may refer to two separate elements being joined together, joined, or the like. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Technical scheme in the embodiment of this application is loaded down with trivial details for the repair process who solves differential pressure valve among the above-mentioned prior art, the problem that wastes time and energy, and the general thinking is as follows:
this application has designed a differential pressure valve, through be provided with adjusting device on the plug screw 4 at the differential pressure valve, and the rotatable setting in the through-hole 41 of plug screw 4 of adjusting device's one end, adjusting device's the other end meets with spring 5, moves and realizes the compression to spring 5 towards spring 5 under adjusting device's rotary motion effect from this. So when the differential pressure valve is longer because of the live time, lead to its theoretical pressure differential to diminish and need be to its adjustment, can realize the further compression to spring 5 through rotating adjusting device, accomplish the adjustment to 5 pre-compaction amounts of spring from this for the differential pressure valve obtains repairing, and need not disassemble the differential pressure valve, also need not to change the spare part of differential pressure valve, can accomplish the adjustment of differential pressure valve. Therefore, the problems that in the prior art, the repair process of the differential pressure valve is complicated, and time and labor are wasted are solved.
Example 1
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1-4, a differential pressure valve comprises a valve body 1 and a valve seat 2, wherein the valve body 1 is fixedly connected with the valve seat 2, and the valve seat 2 is provided with a mounting hole through which the differential pressure valve is mounted on a bogie. A valve cavity is formed in the valve body 1, and two overflow valves 3 which are identical in structure and communicated in a reverse parallel mode, namely a first overflow valve and a second overflow valve, are mounted in the valve cavity. The top of the overflow valve 3 is provided with a plug screw 4, the bottom of the overflow valve 3 is provided with a valve port 7, the inner side wall of the valve port 7 is provided with a valve core 6 in an attaching manner, and a spring 5 with a certain precompression amount is arranged between the plug screw 4 and the valve core 6. The valve cavity comprises a first cavity and a second cavity, a first overflow valve is installed in the first cavity, and a second overflow valve is installed in the second cavity. Specifically, the first cavity includes a first cavity portion 12 and a second cavity portion 13; the second cavity comprises a third cavity part 14 and a fourth cavity part 15; the first cavity part 12 and the fourth cavity part 14 are positioned on the same side, and a first valve port of the first overflow valve separates the first cavity part from the fourth cavity part; the third chamber section 14 and the second chamber section 13 are on the same side, and the second port of the second relief valve separates the third chamber section 14 from the second chamber section 13. And guide rods 8 are arranged at the valve ports of the first overflow valve and the second overflow valve. The structure through above differential pressure valve can realize the adjustment to left and right sides spring pressure difference, however along with the long-time use of differential pressure valve, lead to its theoretical pressure differential to diminish and when needing to its adjustment, all need disassemble the spare part that the differential pressure valve was pressed to the differential pressure among the prior art and change, just can accomplish the restoration to the differential pressure valve, has caused the repair process of differential pressure valve loaded down with trivial details from this, the problem that wastes time and energy.
In order to solve the problems of complex repairing process and time and labor waste of the differential pressure valve in the prior art, the adjusting device is arranged on the screw plug 4 in the embodiment, one end of the adjusting device is rotatably arranged in the through hole 41 of the screw plug 4, and the other end of the adjusting device is connected with the spring 5, so that the adjusting device moves towards the spring under the action of the rotating motion of the adjusting device and compresses the spring. Specifically, the adjusting device comprises an adjusting piece 9 and a pressing piece 10, wherein the adjusting piece 9 is rotatably arranged in a through hole 41 of the plug screw 4; the pressing piece 10 is connected with the adjusting piece 9 through threads, and the pressing piece 10 is connected with the spring 5, so that the pressing piece 10 can compress the spring 5 under the rotating action of the adjusting piece 9. Through the cooperation of above regulating part 9 and the piece 10 that compresses tightly promptly, need not to disassemble the differential pressure valve, just can accomplish the adjustment to pressure differential, realize the theoretical pressure differential of differential pressure valve, solved among the prior art repair process of differential pressure valve loaded down with trivial details from this, problem that wastes time and energy has also guaranteed vehicle safety, steady operation simultaneously.
Specifically, as shown in fig. 3-4, the screw plug 4 is provided with threads on its outer periphery, and is connected to the top of the valve body 1 by the threads. The screw plug 4 is provided with a through hole 41, a screw plug cavity 42 which is opened downwards is formed in the screw plug 4, and the through hole 41 is communicated with the screw plug cavity 42. And still be equipped with seal groove 44 on the plug screw 4 inner wall that is equipped with through-hole 41 department, seal groove 44 is ring shape structure, and seal groove 44 encircles the inner wall a week of plug screw 4 promptly to be provided with sealing washer 45 in the seal groove 44, the outside of regulating part 9 is located to sealing washer 45 cover, can seal the valve pocket through setting up this sealing washer, guarantees the leakproofness of valve pocket, prevents that the compressed air in the valve pocket from leaking from plug screw 4. Meanwhile, the inner wall of the plug screw cavity 42 is further provided with a guide groove 43, and the guide groove 43 extends towards the opening direction of the plug screw cavity 42.
In this embodiment, the adjusting member 9 is an adjusting bolt, one end of the adjusting bolt passes through the through hole 41 of the plug screw 4, and the other end of the adjusting bolt extends into the plug screw cavity 42. Specifically, one end of the adjusting member 9 is threaded and extends to the outside of the plug screw 4 through the through hole 41. The top of the adjusting piece 9 is provided with a rotating groove 92, and other structures such as a hexagon socket structure and the like can be selected; the end of the adjusting member is further provided with a fastening member 11, in this embodiment, the fastening member 11 is a fastening nut, the adjusting member 9 is connected with the fastening member 11 through threads, and the adjusting member 9 is connected with the screw plug 4 through the fastening member 11. When the adjusting member 9 needs to be rotated, the fastener 11 is first unscrewed, and then the adjusting member 9 is rotated by inserting a tool into the rotating groove 92 at the top of the adjusting member 9, thereby achieving the rotational movement of the adjusting member 9.
In order to prevent the unstable situation that can appear under the effect of spring 5 pre-pressure in regulating part 9, this application has set up limit flange 91 structure on regulating part 9, in this embodiment, limit flange 91 encircles in adjusting bolt's middle part to meet with the up end of plug screw cavity 42. Through setting up this flange structure, can play limiting displacement to regulating part 9, under the effect of spring 5 pre-compression promptly, can guarantee that regulating part 9 is in stable and vertical state.
In this implementation, compress tightly a 10 and adopt the nut structure to compress tightly for fine thread threaded connection between 10 and the regulating part 9, adopt fine thread structure can realize the fine setting to compressing tightly a 10 removal, make opening, the closing pressure of differential pressure valve more be close theoretical pressure differential from this, satisfy customer's high performance index requirement. The compressing member 10 is located in the cavity of the screw plug 4, and meanwhile, the lower end face of the compressing member 10 is provided with an annular groove, so that a first layer wall and a second layer wall are formed, and the second layer wall surrounds the outer side of the first layer wall. The outside of second floor wall is provided with two and prevents changeing guide 101, and two prevent changeing guide 101 symmetric distribution in the both sides of second floor wall, and prevent changeing guide 101's structure and the guiding groove 43 on the plug screw 4 inner wall and cooperate for prevent changeing in guide 101 can insert the guiding groove 43, and prevent changeing guide 101 and can slide along the extending direction of guiding groove 43, restricted the rotation that compresses tightly 10 from this, and play the effect of direction to it. So under the effect of preventing changeing guide 101, compress tightly 10 and can't rotate along with the rotation of regulating part 9, but all turn into linear motion with the rotary motion of regulating part 9 for compress tightly 10 and remove towards spring 5, realized the adjustment to spring 5 pre-compaction volume from this, consequently prevent changeing under the guide 101 effect, make the regulating part with compress tightly the more effective restoration of realizing the differential pressure valve of piece.
The spring 5 is located between the pressure piece 10 and the valve core 6, whereby the spring 5 is in a pre-compressed state under the co-action of the pressure piece 10 and the valve core 6. Specifically, a spring seat is provided on the valve core 6, one end of the spring 5 is mounted on the spring seat, and the other end of the spring is connected with the pressing member 10, so that the spring 5 is located between the pressing member 10 and the valve core 6 and is compressed. Further, spring 5's upper end is located between first floor wall and the second floor wall, and spring 5's upper end is located the recess that compresses tightly a 10 lower terminal surface promptly, and the outer diameter structure of first floor wall cooperatees with spring 5's structure for spring 5 can block on the outer peripheral face of first floor wall, more stable and the adjustment of being convenient for when structure can make spring 5 compressed more above the adoption.
To sum up, this application is through adopting above structure, when the differential pressure valve needs to be adjusted, can be through rotating regulating part 9, turn into the rotary motion of regulating part 9 and compress tightly the piece 10 along reciprocating of axis, realized the adjustment to spring 5 compression capacity. Further, the anti-rotation guide part 101 is further arranged in the embodiment, under the limiting effect of the anti-rotation guide part, the pressing part 10 cannot rotate along with the adjusting part 9, and therefore the rotary motion of the adjusting part 9 is completely converted into the linear motion of the pressing part 10. So when the differential pressure valve need be adjusted, need not to dismantle it, and only need rotate regulating part 9, make and compress tightly 10 and reciprocate the compression capacity that changes spring 5, realize the adjustment to the compression capacity of spring 5 from this, accomplish the restoration to the differential pressure valve promptly, solved among the prior art repair process of differential pressure valve loaded down with trivial details, the problem that wastes time and energy.
For a clearer explanation of the present application, the working principle of the present invention is further explained below by taking the embodiments shown in fig. 1 to 4 as examples:
when the difference value of the pressure of the left air spring subtracted from the pressure of the right air spring is larger than the opening pressure of the differential pressure valve, the guide rod 8 moves upwards under the action of the pressure of the first overflow valve to open the first valve port, and at the moment, compressed air of the right air spring flows to the left air spring, and the valve port is closed until the difference value reaches the closing pressure. When the difference value of the left air spring pressure minus the right air spring pressure is larger than the differential valve opening pressure, the guide rod 8 moves upwards under the action of the pressure of the second overflow valve to open the second valve port, and at the moment, the compressed air of the left air spring flows to the right air spring until the difference value reaches the closing pressure, and the valve port is closed. Therefore, the adjustment of the pressure of the air springs on the left side and the right side is completed, and the safe operation of the vehicle is ensured. However, along with the long-time use of the differential pressure valve, the theoretical differential pressure of the differential pressure valve is reduced and the differential pressure valve needs to be adjusted, parts of the differential pressure valve need to be disassembled and replaced in the prior art, and the differential pressure valve can be repaired, so that the problems that the repair process of the differential pressure valve is complicated, time consuming and labor consuming are caused.
In order to solve the problems, the adjusting piece 9 is arranged on the screw plug 4, and the pressing piece 10 is connected to the adjusting piece 9 in a threaded mode. Meanwhile, the two side surfaces of the compressing member 10 are symmetrically provided with the anti-rotation guide members 101, and the structures of the anti-rotation guide members 101 are matched with the guide grooves 43 on the inner wall of the screw plug 4, so that the anti-rotation guide members 101 can be inserted into the guide grooves 43, and the anti-rotation guide members 101 can slide along the extending direction of the guide grooves 43, thereby limiting the rotation of the compressing member 10 and guiding the compressing member. Therefore, when the adjusting piece 9 is rotated, the pressing piece 10 cannot rotate along with the adjusting piece 9 due to the limiting effect of the anti-rotation guide piece 101, so that the rotating motion is completely converted into the vertical movement of the pressing piece 10 along the axis under the effect of the threads, and the pressing piece 10 further compresses the spring 5. So through adopting above structure, make the pre-compaction volume of spring 5 obtain the adjustment, when differential pressure valve need adjust, need not to dismantle it, and only need rotate regulating part 9, make and compress tightly a 10 volume of compression that reciprocates and change spring 5, realize the adjustment to spring 5 volume of compression from this, accomplish the restoration to the differential pressure valve promptly, solved among the prior art the repair process of differential pressure valve loaded down with trivial details, the problem that wastes time and energy.
Example 2
A differential pressure valve, as shown in FIG. 5, comprises two overflow valves 3 which are identical in structure and communicated with each other, and the difference between the embodiment and the embodiment 1 is the structure of a screw plug 4. In this embodiment, the inner side wall of the through hole 41 of the plug screw 4 is provided with a thread, the adjusting piece 9 is of a bolt structure, the plug screw 4 is in threaded connection with the adjusting piece 9, one end of the adjusting piece 9 penetrates through the through hole 41, the end of the adjusting piece 9 is connected with the fastening piece 11 through the thread, the fastening piece 11 is of a fastening nut structure, and the adjusting piece 9 and the plug screw 4 are fixed together through the fastening piece 11. The department of meeting of compressing tightly piece 10 and regulating part 9 is equipped with the recess, and in the one end of regulating part 9 inserted the recess, and can be rotary motion is done in the recess, in this embodiment the recess is the conical structure of invering, and the tip and the groove structure of regulating part 9 cooperate, and the lower tip design of regulating part 9 is the circular cone terminal surface promptly, can play better direction effect placed in the middle to the removal that compresses tightly piece 10 through adopting this structure for compress tightly piece 10 under the promotion of regulating part 9, more effective realization is to the compression of spring 5. Meanwhile, a sealing ring is arranged between the pressing piece 10 and the inner wall of the plug screw cavity 42, an annular sealing groove is formed in the pressing piece, the sealing ring is installed in the sealing groove, the valve cavity can be sealed by the sealing ring, the sealing performance of the valve cavity is guaranteed, and compressed air in the valve cavity is prevented from leaking from the plug screw 4.
Because the threaded connection of regulating part 9 and plug screw 4, so can be through rotatory regulating part 9, make regulating part 9 downstream, regulating part 9 meets the department with compressing tightly 10 simultaneously, so regulating part 9 downstream promotes compresses tightly also the removal downwards of part 10, make and compress tightly 10 further compression spring, the effect of adjustment has been played to the precompression volume of spring, make the differential pressure valve obtain the restoration, finally realized need not to disassemble the differential pressure valve, also need not to change the spare part of differential pressure valve, can realize the adjustment of differential pressure valve theoretical pressure differential on the automobile body, the repair process of differential pressure valve among the prior art is loaded down with trivial details, the problem of wasting time and energy has been solved.
Based on the above, the invention has at least the following technical effects and advantages:
1. this application has designed a differential pressure valve, through be provided with adjusting device on the plug screw of differential pressure valve, and the rotatable setting in the through-hole of plug screw of adjusting device's one end, adjusting device's the other end meets with the spring, removes and realizes the compression to the spring towards the spring under adjusting device's rotary motion effect from this. So when the differential pressure valve is longer because of the live time, lead to its theoretical pressure differential to diminish and need be to its adjustment, can realize further compression to the spring through rotating adjusting device, accomplish the adjustment to the spring pre-compaction volume from this for the differential pressure valve obtains repairing, and need not disassemble the differential pressure valve, also need not to change the spare part of differential pressure valve. Therefore, the theoretical differential pressure of the differential pressure valve can be adjusted on the vehicle body, and complicated processes of disassembling the differential pressure valve from the vehicle, returning to a factory for maintenance and the like are avoided. Therefore, the problems that in the prior art, the repair process of the differential pressure valve is complicated, and time and labor are wasted are solved.
2. Be equipped with on the cramp in this application and prevent changeing the guide, be equipped with the guide way on the cavity inner wall of plug screw, prevent changeing in the guide way inserts, played spacing, prevent pivoted effect to compressing tightly the piece from this. Consequently, prevent changeing under the effect of guide, compress tightly the piece and can not rotate along with the rotation of regulating part, but all turn into linear motion with the rotary motion of regulating part for compress tightly a removal towards the spring, realize the adjustment to spring pre-compaction volume from this, more effectively realize the restoration to the differential pressure valve promptly.
3. Be equipped with the seal groove in this application, be provided with the sealing washer in the seal groove, the outside of regulating part is located to the sealing washer cover, can seal the valve pocket through setting up this sealing washer, prevents that the compressed air in the valve pocket from leaking from the plug screw. The sealing performance of the valve cavity is ensured.
4. Still be equipped with limit flange on the regulating part in this application, can play limiting displacement to the regulating part, under the effect of spring pre-compression promptly, can guarantee that the regulating part is in stable vertical state.
5. The lower terminal surface of pressing member is equipped with the annular groove in this application, and the upper end card of spring is gone into in the recess, through adopting above structure make the spring compressed stability more, and the adjustment of being convenient for.
Claims (11)
1. The utility model provides a differential pressure valve, its characterized in that includes the valve body, is equipped with the valve pocket in the valve body, be provided with the overflow valve that two structures are the same and reverse parallel intercommunication in the valve pocket, the overflow valve includes:
the screw plug is arranged at the top of the overflow valve, and a through hole is formed in the screw plug;
the valve port is arranged at the bottom of the overflow valve, and a valve core is arranged on the inner side wall of the valve port;
the spring is compressed between the screw plug and the valve core;
and one end of the adjusting device is rotatably arranged in the through hole of the screw plug, the other end of the adjusting device is connected with the spring, and the spring is compressed under the action of the rotating motion of the adjusting device.
2. A differential pressure valve as claimed in claim 1, wherein the adjustment means comprises:
the adjusting piece is rotatably arranged in the through hole of the screw plug;
one end of the pressing piece is connected with the adjusting piece, and the other end of the pressing piece is connected with the spring; the pressing piece moves towards the spring under the action of the rotating motion of the adjusting piece to compress the spring.
3. A differential pressure valve according to claim 2, wherein the pressure member is threadedly connected to the adjustment member.
4. The differential pressure valve according to claim 3, wherein the plug screw is provided with a plug screw cavity with an opening at one end, and the plug screw cavity is communicated with the through hole of the plug screw; the inner wall of the plug screw cavity is provided with a guide groove, and the guide groove extends towards the opening direction of the plug screw cavity; the pressing piece is positioned in the cavity of the screw plug, and an anti-rotation guide piece is arranged on the pressing piece; the rotation-preventing guide is inserted into the guide groove, and the rotation-preventing guide is slidable in a direction in which the guide groove extends.
5. A differential pressure valve according to claim 3, wherein the adjustment member is provided with a position-defining flange which abuts an upper end surface of the plug cavity.
6. The differential pressure valve according to claim 5, wherein a sealing groove is formed in an inner side wall of the plug screw through hole, a sealing ring is installed in the sealing groove, and the sealing ring is sleeved outside the adjusting piece.
7. The differential pressure valve of claim 2, wherein the adjusting member is in threaded connection with the plug screw, the compressing member is provided with a groove, and the end of the adjusting member is movably disposed in the groove.
8. The differential pressure valve of claim 6, wherein a sealing ring is arranged between the pressing piece and the plug screw, an annular sealing groove is arranged on the pressing piece, and the sealing ring is arranged in the sealing groove.
9. A differential pressure valve according to claim 3 or 7, wherein the lower end face of the pressure member is provided with an annular groove into which the upper end of the spring is snapped.
10. A differential pressure valve according to claim 3 or 7, wherein the adjustment member is provided at one end with a fastening member, the fastening member being threadedly connected to the adjustment member and by means of which the adjustment member is connected to the plug screw.
11. A rail vehicle comprising a bogie on which is mounted a differential pressure valve according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004809.7A CN111089190A (en) | 2020-01-03 | 2020-01-03 | Differential pressure valve and rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004809.7A CN111089190A (en) | 2020-01-03 | 2020-01-03 | Differential pressure valve and rail vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111089190A true CN111089190A (en) | 2020-05-01 |
Family
ID=70399562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010004809.7A Pending CN111089190A (en) | 2020-01-03 | 2020-01-03 | Differential pressure valve and rail vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111089190A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112046530A (en) * | 2020-09-18 | 2020-12-08 | 中车青岛四方机车车辆股份有限公司 | Differential pressure valve, bogie suspension system, rail vehicle and differential pressure adjusting method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052095U (en) * | 1989-06-14 | 1990-01-31 | 上海东风机器厂 | Pressure-reducing valve with big overflow |
| CN2216622Y (en) * | 1994-12-09 | 1996-01-03 | 王敬平 | Rotating differential pressure valve |
| CN102518846A (en) * | 2012-01-06 | 2012-06-27 | 福建雪人股份有限公司 | Oil pressure soft bypass valve |
| 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 |
| CN202972081U (en) * | 2012-11-01 | 2013-06-05 | 卓旦春 | Self-operated differential pressure balance valve |
| CN203023560U (en) * | 2013-01-29 | 2013-06-26 | 宁波博技机械有限公司 | Pressure relief valve |
| CN204140983U (en) * | 2014-09-30 | 2015-02-04 | 宁波星箭航天机械有限公司 | Equilibrium valve |
| CN204226766U (en) * | 2014-11-05 | 2015-03-25 | 浙江海洋学院 | A kind of pressure regulator valve |
| CN206386433U (en) * | 2017-01-23 | 2017-08-08 | 中车青岛四方车辆研究所有限公司 | Differential valve for air spring security protection |
| CN208703213U (en) * | 2018-09-06 | 2019-04-05 | 东莞蒲微防水透气膜材料有限公司 | A kind of one-way ventilating explosion-proof valve and box body tightness detect jig |
-
2020
- 2020-01-03 CN CN202010004809.7A patent/CN111089190A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052095U (en) * | 1989-06-14 | 1990-01-31 | 上海东风机器厂 | Pressure-reducing valve with big overflow |
| CN2216622Y (en) * | 1994-12-09 | 1996-01-03 | 王敬平 | Rotating differential pressure valve |
| CN102518846A (en) * | 2012-01-06 | 2012-06-27 | 福建雪人股份有限公司 | Oil pressure soft bypass valve |
| 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 |
| CN202972081U (en) * | 2012-11-01 | 2013-06-05 | 卓旦春 | Self-operated differential pressure balance valve |
| CN203023560U (en) * | 2013-01-29 | 2013-06-26 | 宁波博技机械有限公司 | Pressure relief valve |
| CN204140983U (en) * | 2014-09-30 | 2015-02-04 | 宁波星箭航天机械有限公司 | Equilibrium valve |
| CN204226766U (en) * | 2014-11-05 | 2015-03-25 | 浙江海洋学院 | A kind of pressure regulator valve |
| CN206386433U (en) * | 2017-01-23 | 2017-08-08 | 中车青岛四方车辆研究所有限公司 | Differential valve for air spring security protection |
| CN208703213U (en) * | 2018-09-06 | 2019-04-05 | 东莞蒲微防水透气膜材料有限公司 | A kind of one-way ventilating explosion-proof valve and box body tightness detect jig |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112046530A (en) * | 2020-09-18 | 2020-12-08 | 中车青岛四方机车车辆股份有限公司 | Differential pressure valve, bogie suspension system, rail vehicle and differential pressure adjusting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108036071B (en) | Sand accumulation preventing plug valve | |
| CN201574652U (en) | Door closer | |
| CN205315751U (en) | Hard sealing gate valve of two flat boards | |
| CN111089190A (en) | Differential pressure valve and rail vehicle | |
| CN205978679U (en) | Ultrahigh pressure relief valve | |
| CN109027099B (en) | Piston type self-adaptive variable damping hydraulic shock absorber | |
| CN209904904U (en) | Tensioning device assembly for engineering machinery | |
| CN206785913U (en) | Guided bearing seat with damping regulatory function | |
| CN213575768U (en) | Pressure-adjustable high-pressure limiting valve for common rail | |
| CN115288636A (en) | Gas well composite stage type pressure control production system | |
| CN204878127U (en) | Quick carminative buffer gear | |
| CN219176966U (en) | Integrated Y-shaped stop valve | |
| CN206846013U (en) | Mud special safety valve | |
| CN112283421A (en) | Pressure-adjustable high-pressure limiting valve for common rail | |
| CN219262811U (en) | Dustproof structure of oil storage tank | |
| CN205190198U (en) | Compact pump body structure that can maintain fast | |
| CN201836435U (en) | Top entry type two-way eccentric metal hard sealing ball valve | |
| CN111022675A (en) | High-pressure large-drift-diameter small-torque manual flat valve | |
| CN2934808Y (en) | Adsorption type pollution-resistant one-way valve | |
| CN102734369B (en) | Hydraulic type damper | |
| CN217462392U (en) | Parallel shaft type split electric control unit pump | |
| CN204942560U (en) | Top-opening type stop valve | |
| CN204878974U (en) | Direct action type high speed switch valve | |
| CN213871386U (en) | High-pressure-difference small-flow regulating valve | |
| CN202280679U (en) | Speed control valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200501 |