CN202181962U

CN202181962U - Proportional fuel gas mixing valve

Info

Publication number: CN202181962U
Application number: CN201120280174XU
Authority: CN
Inventors: 周勇
Original assignee: CHANGSHA ZALL TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: CHANGSHA ZALL TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2011-08-03
Filing date: 2011-08-03
Publication date: 2012-04-04
Anticipated expiration: 2021-08-03

Abstract

The utility model discloses a proportional fuel gas mixing valve which comprises a valve body; the valve body is internally provided with a cylindrical fuel gas supply channel, a fuel gas mixing channel and an air supply channel which are arranged with the coaxial line from inside to outside in sequence; and in order to ensure uniform mixing of the fuel gas, the fuel gas mixing channel is independently arranged between the air supply channel and the fuel gas supply channel, and an adjustable throttle valve is arranged on a mixed gas outlet. The proportional fuel gas mixing valve has the following benefits: as wrist-shaped diaphragms made of silicon rubber are adopted, the proportional fuel gas mixing valve has the performances of resisting ozone, ageing and corrosion as well as the performance of resisting high temperature and low temperature; and simultaneously, the throttle valve can control the initial position of the throttle valve by an adjusting bolt to prevent freezing at low temperature and promote the low-temperature start performance. As the air and fuel gas channels and the mixing channel are arranged coaxially, space is saved, and the size of the valve body is effectively reduced.

Description

A kind of proportion expression gas mixing valve

Technical field

The utility model relates to a kind of gas mixing valve, particularly a kind of proportion expression gas mixing valve that the required fuel mixture ratio of generator set operation is automatically adjusted.

Background technique

The present employed proportion expression gas mixing valve of fuel gas generation unit, its main structure is made up of housing, diaphragm group, vacuum connect, fireproof tempering device, air-throttle assemble etc.

(1) diaphragm group and vacuum connect two agent structures realize that mainly function is: during engine start, and can be according to the vacuum signal of vacuum connect collection, automatic accurate control combustion gas and Air mixing ratio; Motor is once when stopping, can the automatic disconnection gas flow, and avoid power valve place to assemble excessive concentration fuel, ensure generator set startability, operation stability.

(2) fireproof tempering device realizes that mainly function is: when the engine chamber operation irregularity, cause that tempering brings have destructive high pressure the time, but releasing pressure automatically avoids each annex of air feed mixing chamber to receive the destruction of impacting with high pressure.

(3) the air-throttle assemble structure realizes that mainly function is: through aperture size control fuel flow rate, thereby ensure speed and the power that generator set turns round.

General proportion expression gas mixing unit all possesses above structure, show that generator set be prone to start, the tempering protection, flame-outly die automatically, stable performance, characteristic that Economy is strong.

Deficiency:

When (1) ambient temperature was lower than-10 ℃, sclerosis appearred in diaphragm group one actuator " wrist shape diaphragm ", move insensitively, can't accurately control gas flow in the work, make unit to start or rotary speed unstabilization calmly.

When (2) ambient temperature was lower than-10 ℃, after the unit operation, air-throttle assemble one actuator " throttle blade " froze, and has clamping stagnation in the work, can't normally open blast tube, makes unit to start.

During (3) for the demand high power, the demand gas flow is big, and the single air feed cavity volume of housing is big, to poor with power different model Engine Matching installation property.

For these reasons, gas mixing valve environment applicability and functional reliability are poor in the existing technology.

The model utility content

In order to solve the technical problem of existing gas mixing valve environment applicability and functional reliability difference, the utility model provides a kind of and overcomes existing diaphragm group and when low temperature, move insensitive defective; Overcome air-throttle assemble and when low temperature, move insensitive defective; It is big to overcome valve volume, is difficult for the defective of installation, can improve a kind of proportion expression gas mixing valve of temperature environment and space environment applicability, reliability.

In order to realize above-mentioned technical purpose; The technological scheme of the utility model is that a kind of proportion expression gas mixing valve comprises valve body; Be provided with gas supply passage cylindraceous, combustion gas mixing passage and air air supply channel in the described valve body; Described gas supply passage, combustion gas mixing passage and air air supply channel be from-inner-to-outer and being coaxially set successively, and described valve body is provided with air inlet, fuel gas inlet and mixed gas outlet, and described air inlet is communicated with the air air supply channel in the valve body; Described fuel gas inlet is communicated with the gas supply passage in the valve body; Described mixed gas outlet is communicated with the combustion gas mixing passage, and described gas supply passage is provided with the mixing restriction with the two ends of mixing restriction, and described mixing restriction is provided with the diaphragm group that is used for the control gaseous flow.

Described a kind of proportion expression gas mixing valve; Described diaphragm group comprises Returnning spring, goes up lower sheeting, wrist shape diaphragm and gasket seal; The upper and lower surface of described wrist shape diaphragm is respectively equipped with compressing tablet and lower sheeting, and the one side of wrist shape diaphragm is placed on gas supply passage, combustion gas mixing passage and the air air supply channel, and an end of described Returnning spring connects wrist shape diaphragm; The other end is fixed on the valve interior wall, and described gasket seal is arranged at the Returnning spring place and is fixed on the valve interior wall.

Described a kind of proportion expression gas mixing valve, described mixed gas outlet is provided with adjustable closure.

Described a kind of proportion expression gas mixing valve; Also comprise the throttle adjustment device, described throttle adjustment device comprises regulates bolt, supporting base, pivoted arm sheet and closure rotating shaft, and described closure rotating shaft is connected to closure and extend out to outside the valve body; Described pivoted arm sheet is socketed on an end of closure rotating shaft; Described supporting base is fixed on the valve outer wall and is in pivoted arm sheet top, has tapped hole on the supporting base, and described adjusting bolt passes tapped hole and contacts to the pivoted arm sheet.

Described a kind of proportion expression gas mixing valve, described pivoted arm sheet are socketed on an end of closure rotating shaft through strip hole.

Described a kind of proportion expression gas mixing valve is with locking spring on the described adjusting bolt.

Described a kind of proportion expression gas mixing valve, described wrist shape diaphragm adopt silicone rubber to process.

The technique effect of the utility model is, through the wrist shape diaphragm that adopts silicone rubber to process, the anti-ozone that can possess, ageing-resistant, corrosion resistant performance; Satisfy the performance of high-low temperature resistant again, closure can prevent that low temperature from freezing through regulating bolt control closure initial position simultaneously; Promote low-temperature startup performance; The space has been saved in the coaxial setting in air and blast tube and hybrid channel, effectively reduces the valve body size.

Below in conjunction with accompanying drawing the utility model is described further.

Description of drawings

Fig. 1 is the throttle adjustment structural front view of the utility model;

Fig. 2 is the throttle adjustment structure left view of the utility model;

Fig. 3 is the utility model valve body structure sectional view;

Wherein 1 is that supporting base, 2 is that adjusting bolt, 3 is that pivoted arm sheet, 4 is that locking spring, 5 is that air air supply channel, 6 is that gas supply passage, 7 is that combustion gas mixing passage, 8 is that combustion gas mixing restriction, 9 is that wrist shape diaphragm, 10 is that last lower sheeting, 11 is a gasket seal; 12 is closure; 13 is the closure rotating shaft, and 14 is strip hole.

Embodiment

Referring to Fig. 1, Fig. 2, Fig. 3, the utility model comprises valve body, is provided with gas supply passage cylindraceous 6, combustion gas mixing passage 7 and air air supply channel 5 in the valve body; Gas supply passage 6, combustion gas mixing passage 7 and air air supply channel 5 be from-inner-to-outer and being coaxially set successively, for ensureing that combustion gas mixing is even, between said air air supply channel 5, gas supply passage 6, sets up combustion gas mixing passage 7 separately; Valve body is in being employed in 6 free direction sizes of each passage; Ensure 5 degrees of freedom consistent size, the function flow is satisfied in 1 degrees of freedom size difference; Thereby maximum using spatial volume; Avoided all not of uniform size the causing of 6 degrees of freedom sizes of each passage in the existing technology, the standalone feature size is piled up, and then the actual big defective that takes up room.

Valve body is provided with air inlet, fuel gas inlet and mixed gas outlet, and air inlet is communicated with the air air supply channel 5 in the valve body, and fuel gas inlet is communicated with the gas supply passage 6 in the valve body; Mixed gas outlet is communicated with combustion gas mixing passage 7; Gas supply passage 6 is provided with the mixing restriction with the two ends of mixing restriction, and for reducing radial dimension, end was each one about said combustion gas mixing restriction 8 was equally divided into; Promptly reach radially reduction in bulk, reached the function of not losing flow again.Mix restriction and be provided with the diaphragm group that is used for the control gaseous flow.

The diaphragm group comprises Returnning spring, goes up lower sheeting 10, wrist shape diaphragm 9 and gasket seal 11; Wrist shape diaphragm 9 removes when selecting for use considers anti-ozone, ageing-resistant, chemical resistance; Extra increase lower temperature resistance; Wrist shape diaphragm 9 is processed with the silicone rubber of class by the spy, has both possessed the anti-ozone that need possess in the valve body diaphragm, ageing-resistant, corrosion resistant performance, satisfies the performance of high-low temperature resistant again.The upper and lower surface of wrist shape diaphragm 9 is respectively equipped with compressing tablet and lower sheeting; The one side of wrist shape diaphragm 9 is placed on gas supply passage 6, combustion gas mixing passage 7 and the air air supply channel 5; One end of Returnning spring connects wrist shape diaphragm 9; The other end is fixed on the valve interior wall, and gasket seal 11 is arranged at the Returnning spring place and is fixed on the valve interior wall.

Mixed gas outlet is provided with adjustable closure 12; Closure 12 controlling devices comprise regulates bolt 2, supporting base 1, pivoted arm sheet 3 and closure rotating shaft 13; Closure rotating shaft 13 is connected to closure 12 and extend out to outside the valve body, and pivoted arm sheet 3 is socketed on an end of closure rotating shaft 13, and supporting base 1 is fixed on the valve outer wall and is in pivoted arm sheet 3 tops; Have tapped hole on the supporting base 1, adjusting bolt 2 passes tapped hole and contacts to pivoted arm sheet 3.During work,, drive pivoted arm sheet 3 and rotate, and then drive closure rotating shaft 13 and rotate, again and then change the initial position of 12 of closures, change the semi-closed state into by original closed state through regulating the relative position of bolt 2 on supporting base 1.Closure 12 controlling devices have realized that closure 12 initial positions become adjustable semi-closed state by original complete closed state; Thereby make when ambient temperature lower, after the generator set operation heating, chamber hot air group and the fully natural convection of cool air group before and after 12 of the closures; Avoided in the existing technology; 12 apertures of closure can't be regulated, and are initially closed state, and cold air mass makes 12 temperature of closure be lower than 0 degree; Water vapour is met condensation and is revealed the natural physical phenomenon that further congeals into ice again on 12 of closures in the hot gas group.

Pivoted arm sheet 3 is socketed on an end of closure rotating shaft 13, the inefficacy in case spline arm sheet 3 endwisely slips through strip hole 14.

Regulate on the bolt 2 and be with locking spring 4, make after the 2 adjusting completion of adjusting bolt, avoid owing to the vibrations reason causes position change.

Claims

1. proportion expression gas mixing valve; It is characterized in that; Comprise valve body, be provided with gas supply passage cylindraceous, combustion gas mixing passage and air air supply channel in the described valve body, described gas supply passage, combustion gas mixing passage and air air supply channel be from-inner-to-outer and being coaxially set successively; Described valve body is provided with air inlet, fuel gas inlet and mixed gas outlet; Described air inlet is communicated with the air air supply channel in the valve body, and described fuel gas inlet is communicated with the gas supply passage in the valve body, and described mixed gas outlet is communicated with the combustion gas mixing passage; Described gas supply passage is provided with the mixing restriction with the two ends of mixing restriction, and described mixing restriction is provided with the diaphragm group that is used for the control gaseous flow.

2. a kind of proportion expression gas mixing valve according to claim 1; It is characterized in that; Described diaphragm group comprises Returnning spring, goes up lower sheeting, wrist shape diaphragm and gasket seal; The upper and lower surface of described wrist shape diaphragm is respectively equipped with compressing tablet and lower sheeting, and the one side of wrist shape diaphragm is placed on gas supply passage, combustion gas mixing passage and the air air supply channel, and an end of described Returnning spring connects wrist shape diaphragm; The other end is fixed on the valve interior wall, and described gasket seal is arranged at the Returnning spring place and is fixed on the valve interior wall.

3. a kind of proportion expression gas mixing valve according to claim 1 and 2 is characterized in that described mixed gas outlet is provided with adjustable closure.

4. a kind of proportion expression gas mixing valve according to claim 3; It is characterized in that; Also comprise the throttle adjustment device, described throttle adjustment device comprises regulates bolt, supporting base, pivoted arm sheet and closure rotating shaft, and described closure rotating shaft is connected to closure and extend out to outside the valve body; Described pivoted arm sheet is socketed on an end of closure rotating shaft; Described supporting base is fixed on the valve outer wall and is in pivoted arm sheet top, has tapped hole on the supporting base, and described adjusting bolt passes tapped hole and contacts to the pivoted arm sheet.

5. a kind of proportion expression gas mixing valve according to claim 4 is characterized in that, described pivoted arm sheet is socketed on an end of closure rotating shaft through strip hole.

6. a kind of proportion expression gas mixing valve according to claim 4 is characterized in that, is with locking spring on the described adjusting bolt.

7. a kind of proportion expression gas mixing valve according to claim 2 is characterized in that, described wrist shape diaphragm adopts silicone rubber to process.