CN2632407Y

CN2632407Y - Controllable gas meter motor valve without position switch and rotary block

Info

Publication number: CN2632407Y
Application number: CN 03234762
Authority: CN
Inventors: 朱建
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-05
Filing date: 2003-06-05
Publication date: 2004-08-11
Anticipated expiration: 2013-06-05

Abstract

The utility model is a no trip switch and no blocking rotating controllable fuel gas meter motor valve. An elastic device of the valve between a rack structure valve lever and a machine frame forces a gear and the rack structure to mesh reliably throughout the transmission. The valve only need set the power supply time of the open valve driving motor, not need set the trip switch of the given valve lever position signals. The valve eliminates the component damage caused by the blocking rotating formed impact when the opening valve is in place, and the uncertainty caused by the structure system rigid rebound, eliminates the reliable influence by the trip switch, and the power consumption is low, may design to be quite compact, the complexity of the structure and production technique declines. And the utility model is more suitable to install in the sealing controllable gas meter.

Description

No position limit switch does not have the controlled gas meter motor valve of stall

One, technical field

The utility model relates to a kind of control valve structure of controlled gas meter, is specifically related to a kind of motor-driven valve (hereinafter to be referred as the motor valve) of controlled gas meter.

Two, background technique

Adopting motor valve highly reliable and that be convenient to control in controlled gas meter, is the basic demand that the motor valve is adapted to the existing market demand.The motor valve that uses on the existing market is for reaching the control purpose, be provided with the position limit switch that provides the stem position signal.This kind valve is after unlatching puts in place, because the kinetic energy of drive motor discharges, can make transmission system be subjected to bigger stall impact force, the stall impact force is the unreliable factor of damaged member, impact force can make whole drive system form energy accumulation because of resiliently deformable simultaneously, the release of energy can make the drive motor inverted running, causes the motor valve to close automatically.Position limit switch also can be subjected to mechanical deterioration in the use of long-time (reaching more than 10 years), also may be subjected to the influence of gas attack, and these are the unreliable factor of the motor valve that uses on the existing market.Particularly when this kind motor valve was installed on the controlled gas meter inside of sealing, the unreliable meeting of motor valve caused the unreliable of controlled gas meter.The setting of position limit switch has also increased the structure of motor valve and the complexity of production technology simultaneously.

Three, summary of the invention

The purpose of this utility model is will provide a kind of position limit switch is not set, and does not have the stall phenomenon, and is more reliable, be more suitable for being installed in the motor valve in the airtight controlled gas meter.

For achieving the above object, the technical solution of the utility model is: a kind of do not have a controlled gas meter motor valve that position limit switch does not have stall, it comprises the valve body 1 with sealed mouth 3, Sealing 2, valve rod 4 with rack structure 6, elastic device 5, positioning shaft 7, promote gear 8, frame 9, and driving gear 10, Sealing 3 and valve rod 4 are formed spool, promoting gear 8 is positioned to mesh on positioning shaft 7 fixing on the frame 9 and with rack structure 6, the driving gear 10 that is driven by the motor via reducer structure has the function that enters engagement or disengaging engagement with promotion gear 8, and can only open the unidirectional rotation of direction of valve towards driving, it is characterized in that: between valve rod 4 with rack structure 6 and frame 9, be provided with and make promotion gear 8 and the not out-of-gear elastic device 5 of rack structure 6.

In the technique scheme, described rack structure is can be by the structure of linear motion that promotes gear drive.

Working principle of the present utility model is: the motor valve is when leaving valve events, in given opening valve time, drive driving gear and promote gear engagement by the motor via reducer structure, drive and promote gear, promote gear by driving to the tooth-shape structure on the valve rod, spool is moved to valve opening position, under the effect of last tooth that moves on rack structure one end at elastic device, when meshing and withdrawing from the do action of engagement with the tooth that promotes gear successively, spool is opened and is put in place, this moment, whole drive system did not have stall, and was in the low power operation state.Driving valve finishes, after the motor stall, under the reaction force of elastic device, last tooth of rack structure is in engagement with the tooth that promotes gear, because driving wheel can only be to driving the unidirectional rotation of valve opening position, so can not driving, rack structure promotes the gear counterrotating, so spool is in the valve position of determining relatively of opening.The motor valve is when making closing motion, the motor via reducer structure drives driving gear and promotes gear disengaging engagement, make the promotion gear be in circumferential delocalization state, thereby make spool also be in axial delocalization state, so the reaction force of elastic device can be shifted spool automatically onto and close valve position, and with elasticity Sealing is enclosed in the valve port position.

Because the utilization of technique scheme, the utility model compared with prior art has the following advantages:

1, cancelled position limit switch, eliminated of the negative effect of position limit switch fault, improved the reliability of motor valve motor valve reliability.

2, the utility model no stall phenomenon in service has been eliminated its member and has been subjected to the damage that the stall impact causes.Can not form transmission system because of the energy accumulation that resiliently deformable forms yet, cause the possibility of automatic disable motor valve so eliminated the resilience of transmission system rigidity, thereby further improved the reliability of motor valve.

Four, description of drawings

Accompanying drawing-be the utility model example structure cross-sectional schematic, be illustrated as the opening state of motor valve.

Have in the above-mentioned accompanying drawing: the sealed mouth 3 on valve body 1, Sealing 2, the valve body, valve rod 4, elastic device 5, rack structure 6, positioning shaft 7, promotion gear 8, frame 9, driving gear 10.

Five, embodiment

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

Embodiment: shown in accompanying drawing 1, the motor valve comprises that the unidirectional only rotation that is driven by direct current generator drives the driving gear 10 of driving valve, is fixed in to be positioned with on the positioning shaft 7 on the frame 9 and promotes gear 8, promote rack structure 6 engagements on gear 8 and the valve rod 4, elastic device is set in valve rod 4, is provided with between frame 9 and rack structure 6.The end of valve rod 4 in valve body 1 is fixed with on Sealing 2, the valve body 1 has sealed mouth 3.Driving gear 10 can also be finished and promote gear 8 and enter engagement and out-of-gear action among the figure.Driving gear 10 is in engagement with promotion gear 8 in the drawings, the motor valve is in out the valve state, the thrust of compressed elastic device 5 has guaranteed last tooth and the engagement that promotes gear 8 of rack structure 6 one ends among the figure, because the unidirectional only rotation of driving wheel 10 drives promotion gear 8 and drives valve, so can not driving, rack structure 6 promotes gear 8 counterrotatings, the position of valve rod 4 is definite relatively like this, and the valve state of opening of motor valve just is in definite relatively.If driving gear 10 breaks away from engagement with promotion gear 8 under the driving of motor, promote gear 8 and be in circumferential delocalization state this moment, and therefore compressed elastic device 5 meetings promote valve rod 4, drive Sealing 2, and close encapsulation mouth 3 is finished the pass valve events.

Claims

1, a kind of do not have a controlled gas meter motor valve that position limit switch does not have stall, it comprises the have sealed mouth valve body (1) of (3), Sealing (2), valve rod (4) with rack structure (6), elastic device (5), positioning shaft (7), promote gear (8), frame (9) and driving gear (10), Sealing (3) and valve rod (4) are formed spool, promoting gear (8) is positioned to go up and mesh with rack structure (6) at the upward fixing positioning shaft (7) of frame (9), the driving gear (10) that is driven by the motor via reducer structure has the function that enters engagement or disengaging engagement with promotion gear (8), and can only open the unidirectional rotation of direction of valve towards driving, it is characterized in that: between valve rod with rack structure (6) (4) and frame (9), be provided with and make promotion gear (8) and the not out-of-gear elastic device of rack structure (6) (5).

2, no position limit switch according to claim 1 does not have the controlled gas meter motor valve of stall, it is characterized in that: described rack structure (6) is can be by the straight-line structure of doing that promotes gear (8) driving.