CN2382007Y - Electric valve for IC card membrane style gas meter - Google Patents

Abstract

The utility model relates to a motor valve for a diaphragm type gas meter with an IC card. A motor is installed on a transmission case, and a gear wheel thereof is engaged with a gear on a gear bar; the threaded part of the gear bar is matched with a lifting nut; the front end of the lifting nut is sheathed with a sealing rubber cap, and the sealing rubber can seal a gas outlet on a valve body; the back part of threads of the gear bar is provided with a section of a cylinder, the diameter of the cylinder is smaller than the small diameter of the threads, and the length is larger than the length of threads of the lifting nut; the diameter of the acting surface of the lifting nut, which pushes the sealing rubber cap forwards, is smaller than the diameters of an opening of the valve and the contacting annular surface of the sealing rubber cap, and the back side of the front end of the lifting nut is provided with a pressing spring. The utility model which is arranged on the diaphragm type gas meter with an IC card enables the conversion of the opening and the closure of the valve is reliable, and the sealing performance is good after the valve is closed.

Description

IC-card diaphragm type gas meter motor valve

The utility model relates to IC-card diaphragm type gas meter, especially the electric control valve in this kind gas meter.

The valve that uses in the existing IC-card diaphragm type gas meter, flow meter is electromagnetic valve mostly.This type of valve working poor reliability, valve switch state labile, power consumption is high, sealing is poor.Some producer is at the development electric machine valve now, and this type of valve switch is in stable condition, low, the good airproof performance of power consumption, but valve is from reaching the pass or opening the conversion poor reliability from closing to.Often valve is not opened after closing, and the pass is motionless after opening, and forms so-called locking phenomenon, thereby motor valve functional reliability is reduced greatly, has a strong impact on using and promoting of motor valve.

The purpose of this utility model provides a kind of IC-card diaphragm type gas meter motor valve, avoids the locking phenomenon of motor threshold switch, improves the functional reliability of motor valve.

The purpose of this utility model realizes as follows: it relates to transmission case, motor, motor gear, ratch, support, lifting nut, sealed gum cap and valve body, motor is contained on the transmission case, motor gear on the motor shaft and the gearing mesh on the ratch, the threaded portion of ratch front end is combined with lifting nut, the front end of lifting nut is with the sealed gum cap that can seal the valve body gas outlet, also has an air intake opening on the valve body, at transmission case front fixed valve body, fix simultaneously lifting nut is led, support to the ratch axial limiting, support is that the cylindrical of lifting nut matches with the endoporus of support to the structure of lifting nut guiding, is that support bottom and transmission case carry out axial limiting to the gear on the ratch to the structure of ratch axial limiting.There is one section diameter the back of ratch front threads part less than screw thread path, the length cylinder greater than lifting nut internal thread length, the acting surface diameter that lifting nut promotes sealed gum cap forward seals the diameter that contacts anchor ring with sealed gum cap less than valve, places stage clip between the rear side of lifting nut front end and support.The sealed gum cap front end is a colloid right cylinder, cylindrical back have one with the lifting nut point diameter on annular protrude the inner groove match, the rear end is an endless belt that can seal mutually with the valve body inner groove, the rear and front end is connected with the thin-walled cone-shaped body, and the thin-walled cone-shaped body mainly acts on and is: the one, seal; The 2nd, the resistance when as far as possible reducing out valve.When motor rotates, drive motor gear and ratch and rotate, ratch drives lifting nut by the screw thread transmission and sealed gum cap moves, and moves valve-off on the sealed gum cap when motor is just changeing, remove valve under the sealed gum cap during motor counter-rotating, utilize the rotating of motor and the Guan Yukai of rotation time by-pass valve control.For switch reliably puts in place, the motor rotation time is longer slightly than the required transmission time.When driving valve, the motor counter-rotating, lifting nut moves down, when the threaded portion of lifting nut moves down into diameter on the ratch less than the column part of screw thread path, no screw thread pair transmission, ratch idle running, lifting nut does not move down, does not produce big axial force, and screw thread pair transmission resistance is very little.When motor just changeed, under the effect of stage clip, the external thread recombination on the lifting nut on internal thread and the ratch had realized the screw thread pair transmission, and ratch drives on the lifting nut and moves the pass valve, made the pass valve reliable.When closing valve, till the motor commentaries on classics is motionless, its good airproof performance.Because lifting nut promotes the acting surface diameter of sealed gum cap forward and seals the diameter that contacts anchor ring with sealed gum cap less than valve, make sealed gum cap be easy to produce elastic deformation, buffering also acts on axial force between ratch and the lifting nut when having reduced to close valve, open easily in the time of making out valve, make out valve reliable.

IC-card diaphragm type gas meter motor valve of the present utility model closes valve when having realized the motor high voltage, low-voltage can be driven valve; Drive valve during the motor high voltage, low-voltage can be closed valve; But and under the low-voltage also switch freely, thereby make valve switch conversion reliable.This valve and having closes the advantage of good airproof performance behind the valve.

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

Accompanying drawing is the structural representation of the utility model IC-card diaphragm type gas meter motor valve.

With reference to accompanying drawing, motor 2 is contained on the transmission case 1, motor gear 3 on the motor shaft and the gearing mesh on the ratch 5, the threaded portion of ratch 5 front ends is combined with lifting nut 7, the front end of lifting nut 7 is with sealed gum cap 8, an air intake opening 9 and a gas outlet 12 are arranged on the valve body 10, at the front of transmission case 1 fixed valve body 10, simultaneously that support 6 is fixing, the lower end of support 6 is near the gear on the ratch 5, thereby with ratch 5 axial location, the inner hole sleeve of support 6 is on the outside cylinder of lifting nut 7, to its guiding, there is one section diameter the back of ratch 5 front threads part less than the screw thread path, length is greater than the cylinder of lifting nut 7 internal thread length, when lifting nut 7 drops to this position when making out valve, no screw thread pair transmission, ratch 5 idle running, lifting nut 7 does not move down, do not produce axial force, make and close no self-locking, the pass valve is reliable.Lifting nut 7 is over against the gas outlet 12, and its acting surface diameter that promotes sealed gum cap 8 forward seals 11 diameters that contact anchor ring with sealed gum cap 8 less than valve, makes sealed gum cap 8 be easy to generate elastic deformation, the locking phenomenon when having avoided driving valve, and it is reliable to drive valve.Between the rear side of lifting nut 7 front ends and support 6, place stage clip 4, after driving valve, stage clip 4 is compressed, and gives 7 one power that make progress of lifting nut, external thread when being convenient to close valve and beginning on the ratch 5 can be threaded onto the internal thread on the lifting nut 7 smoothly, realizes the screw thread pair transmission.

Claims (2)

1, a kind of IC-card diaphragm type gas meter motor valve, relate to transmission case, motor, motor gear, ratch, support, lifting nut, sealed gum cap and valve body, motor is contained on the transmission case, motor gear on the motor shaft and the gearing mesh on the ratch, the threaded portion of ratch front end is combined with lifting nut, the front end of lifting nut is with the sealed gum cap that can seal gas outlet on the valve body, also has an air intake opening on the valve body, at transmission case front fixed valve body, fix simultaneously lifting nut is led, support to the ratch axial limiting, it is characterized in that: there is one section diameter the back of ratch (5) front threads part less than the screw thread path, length is greater than the cylinder of lifting nut (7) internal thread length, the acting surface diameter that lifting nut (7) promotes sealed gum cap (8) forward seals (11) contact anchor ring with sealed gum cap (8) diameter less than valve, places stage clip (4) between the rear side of lifting nut (7) front end and support (6).

2, IC-card diaphragm type gas meter motor valve according to claim 1, it is characterized in that: the sealed gum cap front end is a colloid right cylinder, cylindrical back have one with lifting nut (7) point diameter on annular protrude the inner groove match, the rear end is an endless belt that can seal mutually with valve body (10) inner groove, and the rear and front end is connected with the thin-walled cone-shaped body.