CN201963404U - Spring end cover of exhaust brake butterfly valve and exhaust brake butterfly valve thereof - Google Patents
Spring end cover of exhaust brake butterfly valve and exhaust brake butterfly valve thereof Download PDFInfo
- Publication number
- CN201963404U CN201963404U CN2011200265752U CN201120026575U CN201963404U CN 201963404 U CN201963404 U CN 201963404U CN 2011200265752 U CN2011200265752 U CN 2011200265752U CN 201120026575 U CN201120026575 U CN 201120026575U CN 201963404 U CN201963404 U CN 201963404U
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- pressure limiting
- exhaust brake
- butterfly valve
- spring
- limiting device
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Abstract
The utility model provides a spring end cover of an exhaust brake butterfly valve, which consists of a sleeve (42) and a top cover (43). The spring end cover is internally provided with an inner cavity (44) for containing a pressure limiting spring (7), a screw thread is arranged at the outer circle of the sleeve (42), and a first air vent (401) is arranged on the end face of the top cover (43) to be communicated with the inner cavity (44). The utility model further provides the exhaust brake butterfly valve with the spring end cover. The inner cavity of a pressure limiting device shell in the exhaust brake butterfly valve can be guaranteed to be communicated with the atmosphere, so that air resistance can be guaranteed to be zero when a pressure limiting seal piston moves back and forth, the exhaust back pressure of an engine can be effectively adjusted, the heat of the engine can be timely dissipated, and the pressure limiting spring can not be disabled due to high temperature.
Description
Technical field
The utility model relates to a kind of spring end cap and exhaust brake butterfly valve thereof of exhaust brake butterfly valve, belongs to machinery manufacturing technology field.
Background technique
Exhaust brake is a kind of complemental brake system of vehicle, be specially adapted to (heavy type) truck and motorbus and engineering vehicle, can strengthen the vehicle braked performance, need not use or use less foundation brakes (traditional friction brake), just vehicle can be controlled in certain safety speed scope, the prevention car brakeing is malfunctioning, guarantees traffic safety.
Existing exhaust brake mainly is made up of cylinder or vacuum servo cylinder and connected exhaust braking valve.Under the normal vehicle operation state, the exhaust flow of motor is discharged behind exhaust braking valve.When needs are braked, the control system control cylinder of vehicle or the motion of vacuum servo cylinder, cylinder or vacuum servo cylinder drive the certain angle of butterfly sheet upset in the exhaust braking valve, body cavity are divided into the air-inlet cavity and the exhaust cavity of sealing.The waste gas that motor is discharged is intercepted in air-inlet cavity, forms engine exhaust and brake.Also be provided with the mechanism that is used for pressure regulation at valve inner, the size of regulating and controlling valve inner air pressure.Existing pressure-regulating device comprises the pressure release breach and the corresponding tappet gear that is arranged on valve body lower end that are opened on the butterfly sheet.When the butterfly sheet overturns when in the closed position, under suitable air pressure, the tappet end just shutoff in the pressure release indentation, there of valve block.According to varying in size of air pressure in the air-inlet cavity, tappet in the tappet gear can move up and down, produce gap or shutoff again between the pressure release breach of tappet end and butterfly sheet, gas in the air-inlet cavity is discharged in right amount or reach new air pressure balance, thereby play the effect of regulating pressure.
Describe as can be known by said structure, exhaust braking valve is to lean against the back pressure that produces in its air-inlet cavity to come work, because the rotating speed of motor is not constant, in certain scope, change, so its back pressure is not the value of determining just also, along with the raising of engine speed, its back pressure is also increasing, and the force value that surpasses the motor permission will work the mischief to motor itself.Existing exhaust braking valve guarantees that by the regulator on the valve body high back pressure is no more than the authouized pressure value of motor.
The obstruction on the existing regulator and the housing of regulator are full-closed structure.When the butterfly sheet is closed, when engine exhaust entered the air-inlet cavity of valve body, a part of gas inevitably entered in the housing of regulator, and the to-and-fro motion of tappet is caused obstruction, can't effectively regulate and control exhaust back pressure.Simultaneously, because the temperature of engine exhaust is very high, the structure of sealing causes regulator housing inner chamber to dispel the heat, and continuous high temperature can make the temperature distortion of pressure limiting spring, even loses efficacy, and the braking action of exhaust brake seriously lags behind, and sensitivity reduces greatly.
In addition, the obstruction on the existing exhaust braking valve directly is threaded with the regulator housing, and rigging position can manual tune, to its random tightening or unscrewing, all might cause the global failure of exhaust brake.
The model utility content
Technical problem to be solved in the utility model is, a kind of spring end cap and exhaust brake butterfly valve thereof of exhaust brake butterfly valve are provided at the deficiencies in the prior art, the vent of offering by many places, guaranteed the unobstructed of pressure limiting device housing inner chamber in the exhaust brake butterfly valve and atmosphere, resistance of air when guaranteeing the to-and-fro motion of pressure limiting packed-piston is zero, effectively regulation and control engine exhaust back pressure and in time heat radiation prevent pressure limiting spring Yin Gaowen and lost efficacy.The cylinder boss of spring end cap screw thread front end when keeping inner chamber and atmosphere unobstructed, prevents to pollute.By the setting in tamper hole, effectively stopped user's random dismounting.
Technical problem to be solved in the utility model is achieved by the following technical solution:
A kind of spring end cap of exhaust brake butterfly valve is made up of sleeve and top cover, and its inside offers the inner chamber that is used for ccontaining pressure limiting spring, and the sleeve cylindrical is provided with screw thread, offers first vent on the end face of described top cover, with described intracavity inter-connection.
Described first vent can be one, is opened in the central position of top cover end face; Also can be for a plurality of, symmetry is offered on the top cover end face.As required, also offer second vent on the end face of described top cover, offer in the peripheral symmetry of described first vent.
For the ease of assembling and positioning, described sleeve cylindrical is provided with boss at the front end of screw thread, and the height of described boss is 1-5mm.
In order to prevent random dismounting, offer the tamper hole on the described boss to the spring end cap.The diameter in tamper hole is 1-6mm.
According to the progression requirement of pressure limiting device medi-spring, described inner chamber can also be set to stepped shaft.
The utility model also provides a kind of exhaust brake butterfly valve, is provided with the butterfly sheet in the valve body, and the edge of butterfly sheet offers the pressure release breach; Described butterfly sheet is fixed in the body cavity by rotating shaft, is to overturn in body cavity in the center with the rotating shaft; Valve body is provided with pressure limiting device, this pressure limiting device comprises the pressure limiting device housing that is arranged on the body wall, be provided with the pressure limiting packed-piston in the pressure limiting device housing inner chamber, the front end of pressure limiting packed-piston passes the perforate that is opened on the pressure limiting device shell body wall and stretches into body cavity, and corresponding inserted is in described pressure release breach, the end of pressure limiting packed-piston is provided with the pressure limiting spring, the bottom of described pressure limiting spring and the top that offsets as above-mentioned spring end cap, described sleeve cylindrical is threaded with the pressure limiting device inner walls, and the end of top cover and pressure limiting device housing is fixed.
In order to keep pressure limiting device housing internal and external pressure balance, on the described pressure limiting device housing, offer a plurality of the 3rd vents, radially evenly offer along the pressure limiting device housing; Offering after the pressure limiting packed-piston confined planes that the position is positioned at spring end cap the place ahead of described the 3rd vent.
In order to guarantee the space of pressure limiting packed-piston, be provided with the gap between the front-end face of described pressure limiting packed-piston and the pressure limiting device inner walls.
Described pressure limiting device housing is provided with pin, with the corresponding setting in the tamper hole of offering on the described boss.
For regulating and controlling pressure, described pressure limiting packed-piston is stepped, be made up of the tappet on top and the bearing of bottom, and the diameter of tappet is less than the diameter of bearing; Described pressure limiting device housing cavity shape is corresponding with described pressure limiting packed-piston shape be set to stepped.
According to the progression requirement of pressure limiting device medi-spring, the spring mounting hole that described bearing inside is offered is blind hole or shoulder hole, and its degree of depth is less than bearing length.
In sum, the vent that the utility model is offered by many places, guaranteed the unobstructed of pressure limiting device housing inner chamber in the exhaust brake butterfly valve and atmosphere, resistance of air when guaranteeing the to-and-fro motion of pressure limiting packed-piston is zero, effectively regulation and control engine exhaust back pressure and in time heat radiation prevent pressure limiting spring Yin Gaowen and lost efficacy.The cylinder boss of spring end cap screw thread front end when keeping inner chamber and atmosphere unobstructed, prevents to pollute.By the setting in tamper hole, effectively stopped user's random dismounting.
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is described in detail.
Description of drawings
Figure 1A is the utility model spring end cap embodiment one a structural representation;
Figure 1B is the plan view of Figure 1A;
Fig. 1 C is the structural representation of slot for the tamper hole;
Fig. 2 is the utility model spring end cap embodiment two a structural representation;
Fig. 3 is the utility model spring end cap embodiment three a structural representation;
Fig. 4 is the utility model spring end cap embodiment four a structural representation;
Fig. 5 is the overall structure schematic representation of the utility model exhaust brake dish valve;
Fig. 6 is the utility model pressure limiting device housing cross-sectional view;
Fig. 7 is the utility model pressure limiting packed-piston structural representation;
Fig. 8 is the structural representation of pressure limiting device embodiment one in the utility model exhaust brake butterfly valve;
Fig. 9 is the structural representation of pressure limiting device embodiment two in the utility model exhaust brake butterfly valve.
Embodiment
Spring end cap embodiment one
Figure 1A is the utility model spring end cap embodiment one a structural representation; Figure 1B is the plan view of Figure 1A.As Figure 1A in conjunction with shown in Figure 1B, the utility model provides a kind of spring end cap 40 of exhaust brake butterfly valve, is made up of sleeve 42 and top cover 43, and its inside offers the inner chamber 44 that is used for ccontaining pressure limiting spring, sleeve 42 cylindricals are provided with screw thread, and this screw thread is used for linking to each other with pressure limiting device housing 8.Offer first vent 401 on the end face of top cover 43, be connected with inner chamber 44.First vent 401 is opened in the central position of top cover 43 end faces, and offering quantity is one.The setting of this first vent 401, guaranteed the unobstructed of the inner chamber of the pressure limiting device housing 8 in the exhaust brake butterfly valve and atmosphere, resistance of air when guaranteeing 20 to-and-fro motion of pressure limiting packed-piston is zero, effectively regulates and control engine exhaust back pressure and heat radiation in time, prevents pressure limiting spring Yin Gaowen and loses efficacy.
For the ease of assembling and positioning, effectively pressure limiting device housing 8 is sealed, be provided with boss 46 at the front end of the screw thread of sleeve 42 cylindricals, the height of boss 46 is 1-5mm.
For at pressure limiting device housing 8 internal fixation spring end caps 40, make it can not be random tightening or unscrewing, on boss 46, also offer tamper hole 45, the pin 82 corresponding settings that are provided with pressure limiting device housing 8 are referring to shown in Figure 4.In order not influence the intensity of top cover 43, tamper hole 45 diameters are 1-6mm.Fig. 1 C is the structural representation of slot for the tamper hole, and shown in Fig. 1 C, when the diameter in tamper hole 45 during greater than the height of boss 46, tamper hole 45 forms a slot 45 ' on boss 46, the pin 82 corresponding settings that are provided with pressure limiting device housing 8.
Spring end cap embodiment two
Fig. 2 is the utility model spring end cap embodiment two a structural representation.In order better to guarantee the unobstructed of pressure limiting device housing inner chamber and atmosphere, more effective regulation and control engine exhaust back pressure and heat radiation in time, described first vent 401 can be as described in the above-mentioned embodiment one, offering quantity is one, and to offer the position be central position at the top cover end face.As shown in Figure 2, as required, first vent 401 also can be for a plurality of, and symmetry is offered on top cover 43 end faces.
Other features of present embodiment are identical with embodiment one, referring to embodiment one, repeat no more.
Spring end cap embodiment three
Fig. 3 is the utility model spring end cap embodiment three a structural representation.As shown in Figure 3,, on embodiment one basis, also offer second vent 402 on the end face of top cover 43, offer in the peripheral symmetry of described first vent 401 as preferred scheme.
Other features of present embodiment are identical with embodiment one, referring to embodiment one, repeat no more.
Spring end cap embodiment four
Fig. 4 is the utility model spring end cap embodiment four a structural representation.On embodiment two basis, according to the progression requirement of pressure limiting device medi-spring, the inner chamber 44 of spring end cap can also be set to stepped shaft except being set to blind hole.As shown in Figure 4, the inner chamber 44 of top cover 43 is a shoulder hole, and first vent 401 is a plurality of, and symmetry is offered on top cover 43 end faces.
Other features of present embodiment are identical with embodiment two, referring to embodiment two, repeat no more.
Fig. 5 is the overall structure schematic representation of the utility model exhaust brake dish valve.As shown in Figure 5, the utility model also provides a kind of exhaust brake butterfly valve, is provided with butterfly sheet 30 in the valve body 1, and the edge of butterfly sheet 30 offers pressure release breach 31; Butterfly sheet 30 is fixed in valve body 1 inner chamber by rotating shaft 11, is to overturn in valve body 1 inner chamber in the center with rotating shaft 11; Valve body 1 is provided with pressure limiting device, this pressure limiting device comprises the pressure limiting device housing 8 that is arranged on valve body 1 sidewall, be provided with pressure limiting packed-piston 20 in pressure limiting device housing 8 inner chambers, the front end of pressure limiting packed-piston 20 passes the perforate that is opened on pressure limiting device housing 8 walls and stretches into valve body 1 inner chamber, and corresponding inserted is in described pressure release breach 31, the end of pressure limiting packed-piston 20 is provided with pressure limiting spring 7, the bottom of pressure limiting spring 7 is replaced mutually with aforesaid spring end cap 40, sleeve 42 cylindricals are connected with pressure limiting device housing 8 inner threads, and top cover 43 is fixed with the end of pressure limiting device housing 8.In order to guarantee that pressure limiting packed-piston 20 can move freely, be provided with the gap between the front end end face 224 of pressure limiting packed-piston 20 and pressure limiting device housing 8 inwalls 81.
The working procedure of exhaust brake butterfly valve is such: the cylinder 2 of exhaust brake butterfly valve is single-acting cylinder, the piston rod side of single-acting cylinder is equipped with Returnning spring 5, when the suction port of the cylinder 2 of exhaust brake butterfly valve stops air feed and connects atmosphere by the control loop of automobile auxiliary braking, butterfly valve is not worked, that is to say because butterfly sheet 30 is in open mode, pressure limiting packed-piston 20 is under the effect of pressure limiting spring 7, the front end end face 224 of pressure limiting packed-piston bearing 22 withstands on pressure limiting device housing 8 inwalls 81 of valve body 1, thereby pressure limiting device housing baroport 9 is implemented end face seal, at this moment because butterfly valve is in open mode, the gas pressure of butterfly valve overcurrent is low, and gas pressure only acts on the area of tappet 21 heads of pressure limiting packed-piston 20 and pressure limiting device housing baroport 9, low pressure and less relatively lifting surface area can't make pressure limiting packed-piston 20 overcome the pretightening force of pressure limiting spring 7 and retreat; The waste gas of decision engine combustion can not be entered pressure limiting device inside by baroport 9, this moment, the waste gas of minute quantity can be ignored by the pressure limiting piston 20 and the leakage in valve body 1 gap, and waste gas can only be discharged by the exhaust butterfly valve by two side canals of butterfly sheet 30 in the valve body.
When the auxiliary braking control loop of automobile is ventilated to the suction port of cylinder 2, the piston rod of cylinder 2 stretches out, drive the key seat that links to each other, key seat drives rotating shaft 11 by Rocker arm assembly, rotating shaft 11 drives 30 rotations of butterfly sheet, butterfly sheet 30 begins to close, when butterfly sheet 30 rotates to several angle, the pressure release breach 31 of butterfly sheet will contain tappet 21 heads of pressure limiting packed-piston, pressure release breach 31 end faces of butterfly sheet 30 will be pressed on the pressure limiting packed-piston tappet 21 head arc shaped surfaces 213, but butterfly sheet 30 is not closed fully at this moment, along with butterfly sheet 30 is further closed, pressure limiting packed-piston 20 will move backward, bearing 22 heads 224 of pressure limiting piston will leave pressure limiting device housing 8 inwalls 81 end faces of valve body 1, at this moment, because the pressurized gas before the butterfly valve cut-off valve enter the static pressure feedback cavity, the lifting surface area of the packed-piston of butterfly valve pressure limiting is this moment expanded as the sectional area that annulus area that pressure limiting packed-piston bearing 22 areas deduct tappet 21 is added the inlet end that is sealed in sealing surface or line one side that is formed by butterfly sheet 30 and pressure limiting packed-piston tappet 21 heads.In the pretightening force of pressure limiting spring 7 during greater than the product of the compression area of back pressure and pressure limiting packed-piston 20, pressure limiting packed-piston tappet 21 head arc shaped surfaces will keep and the contacting of pressure release breach 31 end faces of butterfly sheet 30, that is to say that the back pressure value is less than the back pressure value of setting before the valve of the butterfly valve of this moment.The rising of back pressure value before along with the butterfly valve valve, when the product of the compression area of back pressure before the valve and pressure limiting packed-piston 20 during greater than the pretightening force of pressure limiting spring 7, pressure limiting packed-piston 20 will continue to moving to spring end cap 40 directions, and along with the raising of back pressure before the valve, the highest setting pressure time limit means of press seals piston 20 that back pressure reaches pressure limiting device before valve will move to the position that the front-end face of the ear end face of pressure limiting packed-piston bearing 21 and spring end cap 40 offsets, and the pressure regulation of pressure limiting device also will reach capacity.
Fig. 6 is the utility model pressure limiting device housing cross-sectional view.As shown in Figure 6,, can also on pressure limiting device housing 8, offer a plurality of the 3rd vents 403, radially evenly offer along pressure limiting device housing 8 in order better to guarantee the unobstructed of pressure limiting device housing inner chamber and atmosphere.Offering after pressure limiting packed-piston 20 confined planes that the position is positioned at spring end cap 40 the place aheads of the 3rd vent, be in order to ensure pressure limiting packed-piston 20 sealing reliably to be arranged on the total travel that moves, its head pressure is that its afterbody pressure of back pressure of butterfly valve is barometric pressure.
Fig. 7 is the utility model pressure limiting packed-piston structural representation.As shown in Figure 7, pressure limiting packed-piston 20 is stepped, be made up of the tappet 21 on top and the bearing 22 of bottom, and the diameter of tappet 21 is less than the diameter of bearing 22.Pressure limiting device housing 8 cavity shapes are corresponding with pressure limiting packed-piston 20 shapes be set to stepped.
Pressure limiting device in the exhaust brake butterfly valve, the requirement of the pressure limiting spring progression that is provided with according to its inside is set to different structural type.
Pressure limiting device embodiment one
Fig. 8 is the structural representation of pressure limiting device embodiment one in the utility model exhaust brake butterfly valve.As shown in Figure 8, when the pressure limiting device of butterfly valve adopts the structure of single-stage spring, thereby for guarantee pressure limiting spring 7 within it portion because of stressed and crooked influence butterfly valve set pressure limiting power accurately, bearing 22 afterbodys at the pressure limiting packed-piston are provided with spring mounting hole, utilize the external diameter in the hole of spring installation that pressure limiting spring 7 is positioned, its mounting hole will be arranged to blind hole 2221, and the degree of depth of its blind hole is less than bearing 22 length, more require more than or equal to the 2 times helical pitches of spring in the pretension stress, thus guarantee the pressure limiting spring do not have after stressed deviate from may.First vent 401 on the spring end cap 40 of exhaust brake butterfly valve can be one, is opened in the central position of top cover 43 end faces; Can be a plurality ofly, symmetry is offered on top cover 43 end faces; Also can offer second vent 402 in first vent, the 401 peripheral symmetries of the central position of top cover 43 end faces.
Pressure limiting device embodiment two
Fig. 9 is the structural representation of pressure limiting device embodiment two in the utility model exhaust brake butterfly valve.As shown in Figure 9, when the pressure that butterfly valve is set higher, when pressure limiting device adopts the structure of single-stage spring can't satisfy pressure regulation to require, the pressure limiting device setting can be adopted the twin-stage spring structure of two pressure limiting springs, but it obviously is impossible that this structure positions two springs as the inner spring mounting hole that still adopts bearing 22 afterbodys at the pressure limiting packed-piston that a blind hole structure is set, if can not locate reliably to two springs, when spring stress bends, two springs certainly will twine, and it can't be played a role.Under these circumstances, adopt arbor structure, that is: adopt 73 pairs of little springs 72 of little spring positioning and guiding bar to position, and continue to adopt spring mounting hole that big spring 71 is positioned.And little spring positioning and guiding bar 73 is the reliability of guaranteeing to locate because diameter is thinner, and little spring 72 is adopted the overall length orientation type.Need be at pressure limiting packed-piston 20 along the axial motion of little spring positioning and guiding bar 73, therefore bearing 22 afterbodys at the pressure limiting packed-piston need have shoulder hole 2222, to make things convenient for entering of little spring positioning and guiding bar 73, can all realize that the overall length of 73 pairs of little springs 72 of little spring positioning and guiding bar is reliable with what guarantee to locate in the total travel of pressure limiting packed-piston 20.The inner chamber 44 of spring end cap 40 is a stepped shaft, can symmetry offer first vent 401 on the end face of top cover 43.
In sum, the vent that the utility model is offered by many places, guaranteed the unobstructed of pressure limiting device housing inner chamber in the exhaust brake butterfly valve and atmosphere, resistance of air when guaranteeing the to-and-fro motion of pressure limiting packed-piston is zero, effectively regulation and control engine exhaust back pressure and in time heat radiation prevent pressure limiting spring Yin Gaowen and lost efficacy.The cylinder boss of spring end cap screw thread front end when keeping inner chamber and atmosphere unobstructed, prevents to pollute.By the setting in tamper hole, effectively stopped user's random dismounting.
Need to prove that therefore the usefulness of only giving an example among above-described each embodiment do not limit protection domain of the present utility model, can do simple the variation or modification as required.
Claims (14)
1. the spring end cap of an exhaust brake butterfly valve, form by sleeve (42) and top cover (43), its inside offers the inner chamber (44) that is used for ccontaining pressure limiting spring (7), sleeve (42) cylindrical is provided with screw thread, it is characterized in that, offer first vent (401) on the end face of described top cover (43), be connected with described inner chamber (44).
2. the spring end cap of exhaust brake butterfly valve as claimed in claim 1 is characterized in that, described first vent (401) is one, is opened in the central position of top cover (43) end face.
3. the spring end cap of exhaust brake butterfly valve as claimed in claim 1 is characterized in that, described first vent (401) is a plurality of, and symmetry is offered on top cover (43) end face.
4. the spring end cap of exhaust brake butterfly valve as claimed in claim 2 is characterized in that, also offers second vent (402) on the end face of described lid (43), offers in the peripheral symmetry of described first vent (401).
5. the spring end cap of exhaust brake butterfly valve as claimed in claim 1 is characterized in that, described sleeve (42) cylindrical is provided with boss (46) at the front end of screw thread, and the height of described boss (46) is 1-5mm.
6. the spring end cap of exhaust brake butterfly valve as claimed in claim 5 is characterized in that, offers tamper hole (45) on the described boss (46).
7. the spring end cap of exhaust brake butterfly valve as claimed in claim 6 is characterized in that, described tamper hole (45) diameter is 1-6mm.
8. the spring end cap of exhaust brake butterfly valve as claimed in claim 1 is characterized in that, described inner chamber (44) is a stepped shaft.
9. an exhaust brake butterfly valve is provided with butterfly sheet (30) in the valve body, and the edge of butterfly sheet (30) offers pressure release breach (31); Described butterfly sheet (30) is fixed in valve body (1) inner chamber by rotating shaft (11), is to overturn in valve body (1) inner chamber in the center with rotating shaft (11); Valve body (1) is provided with pressure limiting device, this pressure limiting device comprises the pressure limiting device housing (8) that is arranged on valve body (1) sidewall, be provided with pressure limiting packed-piston (20) in pressure limiting device housing (8) inner chamber, the front end of pressure limiting packed-piston (20) passes the perforate that is opened on pressure limiting device housing (8) wall and stretches into valve body (1) inner chamber, and corresponding inserted is in described pressure release breach (31), the end of pressure limiting packed-piston (20) is provided with pressure limiting spring (7), it is characterized in that, the bottom of described pressure limiting spring (7) with replace mutually as each described spring end cap (40) of claim 1-7, described sleeve (42) cylindrical is connected with pressure limiting device housing (8) inner thread, and top cover (43) is fixed with the end of pressure limiting device housing (8).
10. exhaust brake butterfly valve as claimed in claim 9 is characterized in that, on the described pressure limiting device housing (8), offers a plurality of the 3rd vents (403), radially evenly offers along pressure limiting device housing (8); Offering after pressure limiting packed-piston (20) confined planes that the position is positioned at spring end cap (40) the place ahead of described the 3rd vent (403).
11. exhaust brake butterfly valve as claimed in claim 9 is characterized in that, is provided with the gap between front-end face of described pressure limiting packed-piston (224) and the pressure limiting device inner walls (81).
12. exhaust brake butterfly valve as claimed in claim 9 is characterized in that, described pressure limiting device housing (8) is provided with pin (82), with the corresponding setting in tamper hole (45) of offering on the described boss (46).
13. as claim 9 or 10 or 11 or 12 each described exhaust brake butterfly valves, it is characterized in that, described pressure limiting packed-piston (20) is stepped, be made up of the tappet (21) on top and the bearing (22) of bottom, and the diameter of tappet (21) is less than the diameter of bearing (22); Described pressure limiting device housing (8) cavity shape is corresponding with described pressure limiting packed-piston (20) shape be set to stepped.
14. exhaust brake butterfly valve as claimed in claim 13 is characterized in that, the spring mounting hole that described bearing (22) inside is offered is blind hole (2221) or shoulder hole (2222), and its degree of depth is less than bearing (22) length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200265752U CN201963404U (en) | 2011-01-25 | 2011-01-25 | Spring end cover of exhaust brake butterfly valve and exhaust brake butterfly valve thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200265752U CN201963404U (en) | 2011-01-25 | 2011-01-25 | Spring end cover of exhaust brake butterfly valve and exhaust brake butterfly valve thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201963404U true CN201963404U (en) | 2011-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200265752U Expired - Fee Related CN201963404U (en) | 2011-01-25 | 2011-01-25 | Spring end cover of exhaust brake butterfly valve and exhaust brake butterfly valve thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201963404U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182565A (en) * | 2011-01-25 | 2011-09-14 | 浙江亿日气动科技有限公司 | Spring end cover of exhausting brake butterfly valve and exhausting brake butterfly valve |
| CN104912638A (en) * | 2014-03-12 | 2015-09-16 | 广州汽车集团股份有限公司 | Exhaust pipeline tone tuning valve and exhaust pipeline |
-
2011
- 2011-01-25 CN CN2011200265752U patent/CN201963404U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182565A (en) * | 2011-01-25 | 2011-09-14 | 浙江亿日气动科技有限公司 | Spring end cover of exhausting brake butterfly valve and exhausting brake butterfly valve |
| CN104912638A (en) * | 2014-03-12 | 2015-09-16 | 广州汽车集团股份有限公司 | Exhaust pipeline tone tuning valve and exhaust pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20160125 |
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| EXPY | Termination of patent right or utility model |