CN216301048U - Brake valve with adjustable pressure boost - Google Patents
Brake valve with adjustable pressure boost Download PDFInfo
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- CN216301048U CN216301048U CN202122546043.8U CN202122546043U CN216301048U CN 216301048 U CN216301048 U CN 216301048U CN 202122546043 U CN202122546043 U CN 202122546043U CN 216301048 U CN216301048 U CN 216301048U
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Abstract
The utility model discloses a pressure boost adjustable brake valve which comprises a valve body, wherein a pressure boost control cavity, a breathing cavity, a main control cavity and a brake cavity are arranged in the valve body, a pressure boost piston is arranged between the pressure boost control cavity and the breathing cavity, a sealing partition plate is arranged between the breathing cavity and the main control cavity, a main piston is arranged between the main control cavity and the brake cavity, an adjusting screw rod is screwed on the main piston, a screwing part is arranged at the bottom end of the adjusting screw rod, a pressure boost contact part is arranged at the top end of the adjusting screw rod, an elastic sleeve is arranged at the top of the sealing partition plate, and a circumferential limiting hole is formed in the elastic sleeve in a manner of being matched with the pressure boost contact part. The utility model has the supercharging function, can quickly realize the adjustment of the supercharging effect of the supercharging piston, can realize the quantitative adjustment of the supercharging effect through the unique structure, enables a user to visually know the internal adjustment amount, further realizes the accurate adjustment action, greatly reduces the debugging difficulty, avoids the repetitive work, improves the working efficiency and has strong practicability.
Description
Technical Field
The utility model relates to the technical field of automobile pressure-increasing adjustable brake valves, in particular to a pressure-increasing adjustable brake valve.
Background
Along with the increasing development of automobile manufacturing industry and transportation industry, the technical requirement to the brake valve for motor vehicles, especially for traction trailers is also higher and higher, it is direct relation to driving safety, utility model patent specification with publication number "CN 212098810U" discloses the automatic proportion brake valve that changes of interior mode, it includes main piston and the pressure boost piston that acts on main piston, pressure boost piston plays the pressure boost effect to main piston, in order to satisfy different user demands, this brake valve still has the structure that is used for adjusting pressure boost piston pressure boost effect, but the brake valve inner structure of this kind of structure is comparatively complicated, it is inconvenient to have the assembly, the later stage is unfavorable for the shortcoming of maintenance, and because it adopts electrodeless regulation's mode, so the increase effect of unable accurate judgement pressure boost piston, need adjust many times repeatedly, there is very big improvement space.
SUMMERY OF THE UTILITY MODEL
The utility model aims to avoid the defects in the prior art and provides a pressure-increasing adjustable brake valve, so that the defects in the prior art are effectively overcome.
In order to achieve the purpose, the utility model adopts the technical scheme that: a pressure boost adjustable brake valve comprises a valve body, wherein a pressure boost control cavity, a breathing cavity, a main control cavity and a brake cavity are arranged in the valve body from top to bottom, a pressure boost piston is arranged between the pressure boost control cavity and the breathing cavity in a sealing and sliding manner, a sealing partition plate is fixedly arranged between the breathing cavity and the main control cavity, a main piston is arranged between the main control cavity and the brake cavity in a sealing and sliding manner, a threaded sleeve is arranged on the main piston, a through hole for the threaded sleeve to slide in a sealing manner is formed in the sealing partition plate, an adjusting screw rod is screwed in the threaded sleeve, the bottom end of the adjusting screw rod is provided with a screwing part, the top end of the adjusting screw rod is provided with a pressure boost contact part, the top of the sealing partition plate is provided with an elastic sleeve, and a circumferential limiting hole is formed in the elastic sleeve in a matching pressure boost contact part;
and a pressurizing contact surface is arranged on the pressurizing piston in a matching manner with the pressurizing contact part.
When the pressurizing contact part rotates, the circumferential limiting hole realizes passive hole expansion to match with the pressurizing contact part to complete rotation, and after the pressurizing contact part rotates for a certain angle, the circumferential limiting hole realizes hole shrinkage to realize circumferential limiting with the pressurizing contact part again;
a pressurizing return spring is arranged between the elastic sleeve and the pressurizing piston;
the pressurizing piston, the sealing partition plate, the elastic sleeve, the pressurizing contact part and the valve body enclose to form the breathing cavity;
the sealing partition plate, the main piston and the valve body enclose the main control cavity;
and an air charging and discharging execution mechanism which can supplement air into the air storage tank and is matched with the main piston to discharge compressed air in the air storage tank is arranged below the brake cavity.
Further, a main air inlet, a pressurization air inlet and a braking air outlet are arranged on the valve body;
the main air inlet is communicated with the main control cavity;
the supercharging air inlet is communicated with the supercharging control cavity;
the brake air outlet is communicated with the brake cavity.
Further, the elastic sleeve comprises an annular portion located on the lower side and a plurality of clamping flaps evenly arranged on the upper side along the circumferential direction, a gap is formed between the clamping flaps, the clamping flaps surround the circumferential limiting hole, the horizontal cross section of the pressurizing contact portion is polygonal, the number of the clamping flaps is consistent with the number of the polygonal edges, and each clamping flap is in independent contact with one side face of the pressurizing contact portion.
Further, a protruding part used for realizing clamping and fixing with a pressurizing return spring is arranged between the annular part and the clamping valve.
Furthermore, the sealing partition plate and the main piston are provided with circumferential anti-rotation structures.
Furthermore, the inflation and deflation actuating mechanism comprises a movable seat which can move up and down in a sealing manner and is arranged in the valve body, a lower limit bracket is arranged on the valve body in a manner of matching with the movable seat, an adjusting hole which is right opposite to the adjusting screw rod is arranged on the lower limit bracket, a plugging piece is detachably arranged in the adjusting hole, a valve core is arranged in the movable seat in a manner of moving up and down, and a sealing spring is arranged between the valve core and the movable seat;
an opening and closing cavity is formed between the movable seat and the valve core, an annular cavity is formed between the valve body and the middle of the movable seat, and a through hole for communicating the opening and closing cavity with the annular cavity is formed in the movable seat.
A compressed gas supplementing opening communicated with the annular cavity is formed in the valve body, and a one-way valve structure which can allow compressed gas to flow to the annular cavity from the compressed gas supplementing opening is arranged between the compressed gas supplementing opening and the annular cavity;
the valve body is also provided with an air source interface communicated with the annular cavity, and the valve core is abutted against the movable seat under the action of the sealing spring to cut off the communication between the brake cavity and the air source interface;
the valve body and the upper part of the movable seat form a pressure maintaining cavity, and the pressure maintaining cavity is directly communicated with the compressed gas supplementing port;
furthermore, be provided with the exhaust hole down on the spacing bracket, the bottom of spacing bracket is installed the elasticity and is prevented dust the pad down, and the elasticity is prevented dust the pad and is covered the exhaust hole, be provided with the exhaust passage who is used for communicateing brake chamber and exhaust hole on the sliding seat.
Furthermore, the sliding seat is of a split structure and comprises an upper half part and a lower half part which are detachably connected.
The technical scheme of the utility model has the following beneficial effects: all structural components are integrated in the valve body, the valve body is neat in appearance, compact in overall structure, easy to assemble and convenient to maintain and maintain in the later period; the utility model has the supercharging function, can quickly realize the adjustment of the supercharging effect of the supercharging piston, is convenient to use, can realize the quantitative adjustment of the supercharging effect through a unique structure in the adjusting process, enables a user to visually know the internal adjustment amount, further realizes accurate adjusting action, greatly reduces the debugging difficulty, avoids repeated work, improves the working efficiency and has strong practicability compared with the blind adjustment in the prior art.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a diagram illustrating a state of the elastic sleeve and the adjusting screw according to the embodiment of the present invention;
FIG. 3 is a schematic perspective view of an elastic sheath according to an embodiment of the present invention;
fig. 4 is a top view of an elastic sleeve according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the brake valve with adjustable pressure boost described in this embodiment includes a valve body 1, and the valve body 1 includes an upper portion and a lower portion, and the two portions are detachably connected in a flange-fitting bolt manner, so as to facilitate assembly of internal parts and facilitate later maintenance.
A pressurization control cavity A, a breathing cavity B, a main control cavity C and a brake cavity D are arranged in the valve body 1 from top to bottom, a pressurization piston 2 is arranged between the pressurization control cavity A and the breathing cavity B in a sealing and sliding mode, a sealing ring is arranged between the pressurization piston 2 and the valve body 1, an annular clamping groove for clamping the sealing ring is arranged on the pressurization piston 2, the pressurization piston 2 has a separation effect on the pressurization control cavity A and the breathing cavity B, namely, the inner cavity spaces of the pressurization control cavity A and the breathing cavity B can change along with the up-and-down movement of the pressurization piston 2, when the pressurization piston 2 moves downwards, the space of the pressurization control cavity A is increased, the space of the breathing cavity B is decreased, otherwise, when the pressurization piston 2 moves upwards, the space of the pressurization control cavity A is decreased, the space of the breathing cavity B is increased, wherein a breathing channel for communicating the breathing cavity B with the outside is arranged on the valve body 1, when breathing chamber B increases, inhale external air through breathing passageway, when breathing chamber B reduces, discharge inside unnecessary air through breathing passageway.
Fixed sealed partition 3 that is provided with between respiratory cavity B and the main control chamber C, be provided with the sealing washer between sealed partition 3 and the valve body 1, be provided with the ring groove who is used for clamping the sealing washer on the sealed partition 3, the outer edge in the bottom of cooperation sealed partition 3 is provided with spacing step on the valve body 1, the outer edge in top of cooperation sealed partition 3 is provided with the jump ring on the valve body 1, be provided with the ring groove who is used for installing the jump ring on the valve body 1, under the cooperation of jump ring and spacing step, realize sealed partition 3's rigidity.
The main piston 4 is arranged between the main control cavity C and the brake cavity D in a sealing and sliding mode, the sealing ring is arranged between the main piston 4 and the valve body 1, and the main piston 4 is provided with an annular clamping groove used for clamping the sealing ring.
The main piston 4 is provided with a threaded sleeve 4a, the threaded sleeve 4a is integrally formed on the main piston 4 and is positioned in the middle of the main piston 4, the threaded sleeve 4a extends upwards compared with the main piston 4, the sealing partition plate 3 is provided with a through hole 3a for the threaded sleeve 4a to slide in a sealing manner, a sealing ring is arranged between the sealing partition plate 3 and the threaded sleeve 4a, the sealing partition plate 3 is provided with an annular clamping groove for clamping the sealing ring, an adjusting screw rod 5 is screwed in the threaded sleeve 4a, the bottom end of the adjusting screw rod 5 is provided with a screwing part 5a, the screwing part 5a can be a common knob structure such as an inner hexagonal screwing groove, the corresponding tool is matched with the screwing part 5a to realize the screwing action of the adjusting screw rod 5, the top end of the adjusting screw rod 5 is provided with a pressurizing contact part 5b, the top of the sealing partition plate 3 is provided with an elastic sleeve 6, and the elastic sleeve 6 is attached to the sealing partition plate 3, the elastic sleeve 6 is internally provided with a circumferential limiting hole 6a matched with the pressurizing contact part 5 b.
The pressurization piston 2 is provided with a pressurization contact surface 2a in cooperation with the pressurization contact part 5b, and when the pressurization piston 2 moves downwards, the pressurization contact surface 2a is in contact with the top of the pressurization contact part 5b, so that when the pressurization piston 2 continues to move downwards, the pressurization effect of the main piston 4 can be given.
When pressure boost contact site 5b was rotatory, the spacing hole of circumference 6a realized passive reaming and accomplished the rotation action with cooperation pressure boost contact site 5b, after pressure boost contact site 5b rotated certain angle, the spacing hole of circumference 6a realized the shrinkage cavity in order to realize again with pressure boost contact site 5b between the circumference spacing.
And a boosting return spring 7 is arranged between the elastic sleeve 6 and the boosting piston 2, so that auxiliary reset of the boosting piston 2 can be completed.
When booster piston 2 was in last extreme position, booster return spring 7 still was in the precompression state, so booster return spring 7 can give 4a decurrent pressure of sealed baffle all the time, just so can be under the effect of pressure for sealed baffle 4 is supported tightly, the circumferential direction's the condition can not appear, sealed baffle 4 is in a completely fixed state promptly, and is same, under booster return spring 7's pressure effect, the pivoted condition can not appear in booster piston 2 and elastic sleeve 6.
The upper side of the pressurizing piston 2 and the valve body 1 enclose the pressurizing control cavity A.
The respiratory cavity B is enclosed by the pressurizing piston 2, the sealing partition plate 3, the elastic sleeve 6, the pressurizing contact part 5B, the pressurizing return spring 7 and the valve body 1.
The seal partition plate 3, the main piston 4 and the valve body 1 enclose the main control chamber C.
The valve body 1 is provided with a main air inlet 8, a pressurization air inlet 9 and a braking air outlet 10, wherein the main air inlet 8 is communicated with a main control cavity C, the pressurization air inlet 9 is communicated with a pressurization control cavity A, the braking air outlet 10 is communicated with a braking cavity D, and one or more braking air outlets 10 can be arranged.
Wherein main air inlet 8 and pressure boost air inlet 9 share an air inlet, and air inlet structure arranges on the amalgamation face of valve body 1, in order to guarantee the leakproofness of junction, is provided with seal cover 22 in the amalgamation department.
As shown in fig. 2, in this embodiment, the pressurizing contact portion 5b is a regular hexagon structure, and 6 clamping flaps 6c are correspondingly provided, so that the pressurizing contact portion 5b is just clamped in a circumferential limiting hole 6a surrounded by 6 clamping flaps 6c, when the pressurizing contact portion 5b rotates, the clamping flaps 6c are pushed outwards and pressed, the clamping flaps 6c move outwards to provide a space for the rotation of the pressurizing contact portion 5b, after the pressurizing contact portion 5b rotates by 60 °, each side surface of the pressurizing contact portion 5b corresponds to each clamping flap 6c again, at this time, the clamping flaps 6c reset under the action of their own elastic force, and are attached to each surface of the pressurizing contact portion 5b again, so as to achieve a tight fit effect, when in actual operation, the clamping flaps 6c impact the pressurizing contact portion 5b at the moment of resetting, so as to generate a "click" sound, the operator can intuitively realize that the rotating speed is 60 degrees, if the rotating speed is 180 degrees, the operator can continuously hear three-sound 'click', quantitative adjustment is realized, and compared with blind adjustment in the prior art, the working efficiency is greatly improved, and great convenience is brought to actual use.
Based on the principle, the structure of the pressurizing contact part can be adjusted according to actual conditions, for example, when the pressurizing contact part is manufactured into an octagonal structure, namely eight clamping petals are arranged, the next connecting action can be completed by screwing 45 degrees every time, namely, 45-degree rotation can be completed at a fixed angle every time.
Be provided with between annular portion 6b and the card lamella 6c and be used for realizing the fixed bulge 6d of chucking with pressure boost reset spring 7, realize the chucking through bulge 6d and pressure boost reset spring 7's inboard and fix, just there has certain clearance like this between the outside of card lamella 6c and pressure boost reset spring 7's the inboard, provides the space for card lamella 6c moves to the outside.
The sealing partition plate 3 and the main piston 4 are provided with circumferential anti-rotation structures, and the sealing partition plate 3 is in a completely fixed state, so that the main piston 4 can not rotate circumferentially any more after the circumferential anti-rotation structures are arranged between the sealing partition plate 3 and the main piston 4, and the adjusting screw 5 can be conveniently screwed.
In this embodiment, circumference anti-rotation structure is including setting up spacing groove 3b on sealed bulkhead 3 and setting up gag lever post 4b on main piston 4, and gag lever post 4b pegs graft at spacing groove 3b, and the size of spacing groove 3b slightly is greater than gag lever post 4b to guarantee can not cause the influence to the normal removal of main piston 4, and spacing groove and gag lever post are all along the even being provided with of circumference a plurality ofly, in order to realize the stable cooperation between main piston 4 and the sealed bulkhead 3.
The below of braking chamber D is provided with the inflation and deflation actuating mechanism that can make up gas and cooperate main piston 4 to emit the compressed gas in the gas holder to the gas holder, and this inflation and deflation actuating mechanism can directly adopt the structure introduced in the utility model patent specification with publication number "CN 212098810U", certainly, the utility model has made further improvement to it on the basis of following the structural function among the prior art to make this inflation and deflation actuating mechanism's overall structure more reasonable, more do benefit to the maintenance of equipment and later stage, and concrete structure is as follows:
fill gassing actuating mechanism including the sliding seat 11 of setting in valve body 1 that can upper and lower sealed removal, cooperation sliding seat 11 is provided with down spacing bracket 12 on the valve body 1, is provided with the jump ring on the valve body 1, and the bottom border laminating setting of jump ring and lower spacing bracket 12 to the realization is spacing to lower spacing bracket 12, and lower spacing bracket 12 is used for restricting the lower extreme position of sliding seat 11.
Be provided with on the lower limit bracket 12 with adjusting screw 5 just right regulation hole 12a, detachable is provided with shutoff piece 13 in the regulation hole 12a, in this embodiment, shutoff piece 13 is the screw, regulation hole 12a fit screw is provided with the screw thread, can reciprocate in the sliding seat 11 be provided with case 14, case 14 adopts rubber materials to make, be provided with sealing spring 15 between case 14 and the sliding seat 11, cooperation case 14 is provided with vertical guide structure on the sliding seat 11, still be provided with the annular holding tank of being convenient for realize sealing spring 15 location installation on the sliding seat 11, the bottom cooperation sealing spring 15 of case 14 is provided with annular mounting groove, case 14 is annular structure, it is porose to set up in the middle of it.
Enclose synthetic chamber E that opens and shuts between movable seat 11 and the case 14, enclose synthetic annular chamber F in the middle part of valve body 1 and movable seat 11, all be provided with the sealing washer between the upper and lower both sides of movable seat 11 and the valve body 1, wherein annular chamber F is located between the sealing washer of both sides, is provided with the via hole 11a that is used for communicateing chamber E and annular chamber F that opens and shuts on the movable seat 11, and the via hole 11a is provided with a plurality ofly.
Be provided with the compressed gas who is linked together with annular chamber F on the valve body 1 and supply mouthful 16, be provided with between compressed gas supply mouthful 16 and the annular chamber F and supply compressed gas to supply the check valve structure of mouthful 16 flow direction annular chamber F by compressed gas, the check valve structure includes jackscrew 17, check valve spring 18 and valve plug 19, when compressed gas enters into compressed gas supply mouthful 16 department, compressed gas drive valve plug 19 moves down, form the clearance that can supply compressed gas to pass through between valve plug 19 and the valve body 1, realize compressing the gaseous passing through of indentation.
The valve body 1 is also provided with an air source interface 20 communicated with the annular cavity F, and the valve core 14 is abutted against the movable seat 11 under the action of the sealing spring 15 to cut off the communication between the brake cavity D and the air source interface 20.
Be provided with the breather hole that link up from top to bottom on the case 14, the breather hole is located case 14 and the inboard of 11 contact position of sliding seat, can not influence the sealed laminating between case 14 and the sliding seat 11, and this breather hole is used for communicateing mounting chamber and the braking chamber D at sealing spring 15 place, alright in order to realize sealing spring 15's activity smoothly like this, when case 14 downstream promptly, the gaseous breather hole of passing through in the mounting chamber at sealing spring 15 place discharges, when case 14 upstream, the gaseous breather hole of passing through in the mounting chamber at sealing spring 15 place is mended into.
The valve body 1 and the upper part of the movable seat 11 enclose a pressure maintaining cavity G, and the pressure maintaining cavity G is directly communicated with a compressed gas supplementing port 16.
An exhaust hole 12b is formed in the lower limiting bracket 12, an elastic dustproof pad 21 is installed at the bottom of the lower limiting bracket 12, the exhaust hole 12b is covered by the elastic dustproof pad 21 to play a dustproof role, and an exhaust channel 11b used for communicating the brake cavity D with the exhaust hole 12b is formed in the movable seat 11.
The movable seat 11 is of a split structure, and comprises an upper half part and a lower half part which are detachably connected, specifically, the upper half part and the lower half part can be connected through a threaded structure, a joint is sealed by an O-shaped ring, compared with a traditional clamp spring type fixed valve core, firstly, processing links are reduced, secondly, assembly difficulty is reduced, two parts of the movable seat 11 are integrally injection-molded through engineering plastics, so that stubborn diseases with high die-casting porosity are eliminated, the product qualification rate is greatly improved, the movable seat 11 with the structure can be installed with the structure inside the movable seat 11, the whole movable seat 11 is directly installed, and compared with an air charging and discharging execution mechanism in the existing structure, the movable seat 11 is strong in structural integrity, contains fewer independent parts, and is more convenient to assemble and later maintenance.
The internal fittings (the booster piston 2, the sealing clapboard 3, the main piston 4, the elastic sleeve 6, the movable seat 11, the lower limit bracket 12 and the like) of the utility model are integrally molded by injection molding of engineering plastics, secondary processing is not needed, the working procedure is reduced, the defects of air holes and the like in the die-casting process are overcome, an internal support type sealing ring can be adopted for a large-size sealing element, the sealing effect is good due to the large tension range of the sealing ring, the tolerance range between the sealing ring and the sliding surface is large, the friction force between the sealing element and the sliding surface is small, the service time and the maintenance period of the sealing element are prolonged, the movable seat adopts threaded connection, the use of a snap spring is reduced, the energy is saved, the emission of carbon dioxide is reduced, the structure uses few fittings, the valve body is required to be processed in a processing center compared with other booster valve adjusting valves, the valve can be processed on a numerical control lathe, the manufacturing cost is saved, easy to assemble and convenient for later maintenance and maintenance.
With the progress of science and technology, new materials are continuously produced, new machines are brought to the brake valve, the novel brake valve adopts a full non-processing mode for internal parts according to different positions and working conditions of use by utilizing the new materials, the weight of the valve is reduced, the working procedures are reduced, the manufacturing period is shortened, the manufacturing yield is improved, and the production cost is reduced.
The working principle of the utility model is as follows:
in the initial state, the gas storage tank (not shown) needs to be supplemented with pressure gas, that is, the pressure source introduces compressed gas through the compressed gas supplementing port 16, the one-way valve structure is opened, the compressed gas enters the annular cavity F and then enters the gas storage tank through the gas source interface 20, and the compressed gas is stored and prepared for the subsequent operation;
when braking is needed, compressed gas is controlled to simultaneously enter a main air inlet 8 and a pressurization air inlet 9 in a braking mode such as foot pedal, then the compressed gas enters a main control cavity C and a pressurization control cavity A, so that the main piston 4 and the pressurization piston 2 simultaneously bear a downward pressure, when the downward movement pressure borne by the main piston 4 is larger than the resistance of the main piston, the main piston 4 moves downwards, correspondingly, when the downward movement pressure borne by the pressurization piston 2 is larger than the resistance of the pressurization piston, the pressurization piston 2 also moves downwards, when the pressurization piston 2 moves for a certain distance, a pressurization contact surface 2a is contacted with the top of a pressurization contact part 5b, the pressurization piston 2 acts on the main piston 4 through an adjusting screw rod 5 and a threaded sleeve 4a, so that the auxiliary push-down action of the main piston 4 by the pressurization piston 2 is realized, namely pressurization is carried out, then the bottom of the main piston 4 is contacted with a valve core 14, the valve core 14 is pushed to move downwards, so that an annular gap is formed between the valve core 14 and the movable seat 11, compressed gas in the gas storage tank sequentially enters a brake pipeline through the gas source connector 20, the annular cavity F, the opening and closing cavity E, the brake cavity D and the brake gas outlet 10, the brake action is further completed, and then all related parts are restored to the original positions under the action of the springs and the internal pressure to prepare for the next brake action;
when needing to be noticed, under the effect of the pressure in the braking chamber D, the main piston 4 can move up to reset itself, and certainly, a reset spring can be arranged between the bottom of the main piston 4 and the valve body 1 to realize auxiliary reset.
In practical use, the supercharging effect of the supercharging piston 2 can be adjusted, and the specific adjustment method is as follows:
the block piece 13 is first removed so that the adjustment hole 12a is in an open state, a special tool is inserted into the valve body 1 through the adjustment hole 12a and engaged with the screw portion 5a at the bottom of the adjustment screw 5, the adjusting screw 5 is screwed, and because the sealing partition plate 3, the main piston 4 and the elastic sleeve 6 are not circumferentially rotated, when the adjusting screw 5 is screwed, the adjusting screw 5 moves up and down, so that the gap between the pressurizing contact surface 2a and the pressurizing contact part 5b is adjusted, and when the gap between the pressurizing contact surface 2a and the pressurizing contact part 5b is reduced, in the same pressure state, when the pressurizing piston 2 moves downward, the pressurizing contact surface 2a comes into contact with the pressurizing contact portion 5b earlier, so that the pressurizing effect on the main piston 4 is achieved, and conversely, when the gap therebetween increases, the pressure increasing contact surface 2a comes into contact with the pressure increasing contact portion 5b later.
This means that, under the same compressed gas condition, when the adjusting screw 5 is moved upwards, the booster piston 2 provides a boosting effect to the main piston 4 earlier, so that the downward displacement of the main piston 4 is larger, the opened degree of the valve core 14 is increased, and the pressure provided by the air storage tank to the brake pipeline is larger, which is equivalent to enhancing the braking effect; when the adjusting screw rod 5 is moved downwards, the pressurizing piston 2 can later provide a pressurizing effect for the main piston 4, so that the downward displacement of the main piston 4 is smaller, the opened degree of the valve core 14 is reduced, the pressure provided in a brake pipeline in an air outlet pipe is reduced, namely the braking effect is weakened, and the adjustment can be carried out according to the actual use habit;
the sum can be: the adjusting screw 5 moves upwards to enhance the braking effect, and the adjusting screw 5 moves downwards to weaken the braking effect.
In the in-process of adjusting, benefit from unique cooperation structure between elastic sleeve 6 and pressure boost contact site 5b, because elastic sleeve 6 does not change, after pressure boost contact surface 5b rotated certain angle and elastic sleeve 6 and deuterogamies, can send the sound of "kaeing", so the user of service can audio-visually know inside regulating variable, and then realize accurate regulation action, great reduction the debugging degree of difficulty, the repetitive work has been avoided, work efficiency is improved, and the practicality is extremely strong.
After a braking work flow is finished, the main piston 4 resets, a gap is formed between the main piston 4 and the valve core 14, residual compressed air on a braking pipeline and a braking element reversely flows into the braking cavity D, then enters the exhaust channel 11b through the gap between the main piston 4 and the valve core 14, then the compressed air downwards opens the elastic dustproof pad 21, the compressed air is discharged to the outside through the exhaust hole 12b, air discharge is realized, after the action is finished, the elastic dustproof pad 21 resets under the action of self elasticity, the exhaust hole 12b is blocked again, the dustproof effect is achieved, parts in the valve body 1 are in a better working environment, and the service life is prolonged.
The utility model also has the function of emergency braking: at ordinary times, because compressed gas exists in the compressed gas supplementing port 16, when the pressure of the compressed gas jacks up the one-way valve structure, part of the compressed gas exists in the pressure maintaining chamber G, the pressure in the pressure maintaining chamber G enables the movable seat 11 to move downwards and abut against the lower limit bracket 12, namely, the pressure at the compressed gas supplementing port 16 and the pressure in the gas storage tank are in a balanced state, when emergency braking is performed, the compressed gas at the compressed gas supplementing port 16 disappears, the pressure intensity is 0, so that the force for driving the movable seat 11 to move upwards is greater than the downward force, the movable seat 11 can move upwards, in the moving process, the valve core 14 is firstly attached to the main piston 4, and finally, the top of the movable seat 11 is attached to the valve body 1 to stop moving, so that the valve core 14 is in sealed connection with the main piston 4, and the communication between the opening and closing chamber E and the braking chamber D and the exhaust passage 11b is blocked, the communication between the interior of the valve body 1 and the outside is blocked, an annular gap is formed between the valve core 14 and the movable seat 11, and compressed gas in the gas storage tank enters the brake cavity D through the annular gap and then enters a brake pipeline, so that the gas-cut emergency braking action is realized.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
1. The utility model provides a brake valve with adjustable pressure boost, includes the valve body, top-down is provided with pressure boost control chamber, respiratory cavity, main control chamber and braking chamber in the valve body, can seal gliding pressure boost piston that is provided with between pressure boost control chamber and the respiratory cavity, the fixed sealed partition that is provided with between respiratory cavity and the main control chamber can seal gliding main piston that is provided with between main control chamber and the braking chamber, its characterized in that:
the main piston is provided with a threaded sleeve, the sealing partition plate is provided with a through hole for the threaded sleeve to slide in a sealing manner, the threaded sleeve is internally screwed with an adjusting screw rod, the bottom end of the adjusting screw rod is provided with a screwing part, the top end of the adjusting screw rod is provided with a pressurizing contact part, the top of the sealing partition plate is provided with an elastic sleeve, and the elastic sleeve is internally provided with a circumferential limiting hole matched with the pressurizing contact part;
the pressurizing piston is provided with a pressurizing contact surface matched with the pressurizing contact part,
when the pressurizing contact part rotates, the circumferential limiting hole realizes passive hole expansion to match with the pressurizing contact part to complete rotation, and after the pressurizing contact part rotates for a certain angle, the circumferential limiting hole realizes hole shrinkage to realize circumferential limiting with the pressurizing contact part again;
a pressurizing return spring is arranged between the elastic sleeve and the pressurizing piston;
the pressurizing piston, the sealing partition plate, the elastic sleeve, the pressurizing contact part and the valve body enclose to form the breathing cavity;
the sealing partition plate, the main piston and the valve body enclose the main control cavity;
and an air charging and discharging execution mechanism which can supplement air into the air storage tank and is matched with the main piston to discharge compressed air in the air storage tank is arranged below the brake cavity.
2. A pressure-increasing adjustable brake valve as defined in claim 1, wherein: the valve body is provided with a main air inlet, a pressurization air inlet and a braking air outlet;
the main air inlet is communicated with the main control cavity;
the supercharging air inlet is communicated with the supercharging control cavity;
the brake air outlet is communicated with the brake cavity.
3. A pressure-increasing adjustable brake valve as defined in claim 1, wherein: elastic sleeve is including being located the annular portion of downside and being located a plurality of card lamella of evenly arranging along circumference of upside, is provided with the clearance between the card lamella, and the card lamella encloses the synthesis spacing hole of circumference, the horizontal cross-section of pressure boost contact site is the polygon, the quantity of card lamella is unanimous with polygonal limit number, and every card lamella all realizes independent contact with a side of pressure boost contact site.
4. A pressure-increasing adjustable brake valve as defined in claim 3, wherein: and a convex part used for realizing clamping and fixing with a pressurizing reset spring is arranged between the annular part and the clamping valve.
5. A pressure-increasing adjustable brake valve as defined in claim 1, wherein: the sealing partition plate and the main piston are provided with circumferential anti-rotation structures.
6. A pressure-increasing adjustable brake valve as defined in claim 1, wherein: the inflation and deflation actuating mechanism comprises a movable seat which can move up and down in a sealing manner and is arranged in the valve body, a lower limit bracket is arranged on the valve body in a manner of matching with the movable seat, an adjusting hole which is right opposite to the adjusting screw rod is arranged on the lower limit bracket, a plugging piece is detachably arranged in the adjusting hole, a valve core is arranged in the movable seat in a manner of moving up and down, and a sealing spring is arranged between the valve core and the movable seat;
an opening and closing cavity is enclosed between the movable seat and the valve core, an annular cavity is enclosed between the valve body and the middle part of the movable seat, a via hole for communicating the opening and closing cavity with the annular cavity is arranged on the movable seat,
a compressed gas supplementing opening communicated with the annular cavity is formed in the valve body, and a one-way valve structure which can allow compressed gas to flow to the annular cavity from the compressed gas supplementing opening is arranged between the compressed gas supplementing opening and the annular cavity;
the valve body is also provided with an air source interface communicated with the annular cavity, and the valve core is abutted against the movable seat under the action of the sealing spring to cut off the communication between the brake cavity and the air source interface;
and the valve body and the upper part of the movable seat enclose a pressure maintaining cavity, and the pressure maintaining cavity is directly communicated with the compressed gas supplementing port.
7. A pressure-increasing adjustable brake valve as defined in claim 6, wherein: the lower limiting bracket is provided with an exhaust hole, the bottom of the lower limiting bracket is provided with an elastic dustproof pad, the elastic dustproof pad covers the exhaust hole, and the movable seat is provided with an exhaust channel for communicating the brake cavity with the exhaust hole.
8. A pressure-increasing adjustable brake valve as defined in claim 6, wherein: the sliding seat is of a split structure and comprises an upper half part and a lower half part which are detachably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122546043.8U CN216301048U (en) | 2021-10-22 | 2021-10-22 | Brake valve with adjustable pressure boost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122546043.8U CN216301048U (en) | 2021-10-22 | 2021-10-22 | Brake valve with adjustable pressure boost |
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| Publication Number | Publication Date |
|---|---|
| CN216301048U true CN216301048U (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122546043.8U Active CN216301048U (en) | 2021-10-22 | 2021-10-22 | Brake valve with adjustable pressure boost |
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| Country | Link |
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| CN (1) | CN216301048U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771819A (en) * | 2021-10-22 | 2021-12-10 | 河北聚银汽车部件有限公司 | Brake valve with adjustable pressure boost |
| CN116236184A (en) * | 2023-05-09 | 2023-06-09 | 成都市青白江区人民医院 | High-precision detection system for vital capacity physical examination |
-
2021
- 2021-10-22 CN CN202122546043.8U patent/CN216301048U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771819A (en) * | 2021-10-22 | 2021-12-10 | 河北聚银汽车部件有限公司 | Brake valve with adjustable pressure boost |
| CN116236184A (en) * | 2023-05-09 | 2023-06-09 | 成都市青白江区人民医院 | High-precision detection system for vital capacity physical examination |
| CN116236184B (en) * | 2023-05-09 | 2023-08-18 | 成都市青白江区人民医院 | High-precision detection system for vital capacity physical examination |
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