KR20000008359U - Electric device for gas valve operation - Google Patents

Abstract

The present invention relates to a gas valve operating device, specifically, can be mounted independently by using a clamp on the gas valve, it is possible to adjust the distance between the sprockets, improved gas valve operating point detection device, It relates to a transmission. It is an object of the present invention to provide a gas valve operation transmission apparatus that can be easily mounted on any size or shape gas valve and separately detects an opening and closing limit of the valve without an error. The present invention body; An electric motor embedded in the body; A drive gear coupled to the rotating shaft of the motor in the body; A first intermediate gear meshing with the drive gear in the body; A first pinion formed on an axis of the first intermediate gear; A second intermediate gear meshing with the first pinion in the body; A second pinion formed on an axis of the second intermediate gear; A sprocket drive gear meshing with the second pinion in the body and the shaft exposed out of the body; A drive sprocket coupled to the shaft of the sprocket drive gear exposed outside the body; In the transmission device is composed of a chain connecting the drive sprocket and the valve sprocket of the gas valve, the transmission device for opening and closing the gas valve by rotating the worm gear engaged to the handle shaft of the gas valve by the power of the electric motor, the fixing piece is coupled to the lower part of the body And the movable piece is coupled to the fixing piece by a tightening bolt, and the transmission device body is fixed to the movable piece and the movable piece can be mounted on the gas valve by tightening the gas valve.

Description

Apparatus for operating gas valve

The present invention relates to a gas valve operating device. Specifically, the present invention relates to a gas valve operation transmission apparatus that can be independently mounted to a gas valve using a clamp, to adjust a distance between sprockets, and to improve an open / close limit detection device of a valve.

In the gas pipe, a valve for controlling the flow of gas is connected in the middle. The gas valve is connected to the middle of the gas pipe and operated as a valve handle to prevent or open the flow of gas at the time of gas leakage or other needs. Figure 1a is a perspective view showing a gas valve connected to the middle of the gas pipe and Figure 1b is a perspective view showing the internal structure of the gas valve. The gas valve has a gas inlet and outlet 16 through which a gas pipe is connected to the valve body 10, and a ball 14 is inserted therein. A hole 15 is drilled in the ball 14 to interrupt the flow of gas. This will be explained below. The upper part of the gas valve is a gear box 19, the valve shaft 17 fixed to the upper portion of the ball 14 is vertically penetrated in the center and the valve shaft 17 has a worm gear having a central angle of about 90 ° ( 13) is fixed horizontally. The worm gear 13 meshes with the gear 12 formed on the handle shaft 18.

The operation of the gas valve is configured as follows. When closing the gas, turning the handle 11 rotates the gear 12 of the handle shaft 18 while the worm gear 13 rotates horizontally. Since the worm gear 13 and the ball 14 are fixed, the ball 14 rotates horizontally in the valve body 10, whereby the through hole 15 is positioned at right angles to the gas inlet and outlet 16, The gas flow is blocked while blocking the inlet and outlet 16. On the contrary, to open the gas, the handle 11 is operated in the direction opposite to the direction of closing the gas. Then, the position of the through hole 15 of the gas inlet / outlet 16 and the ball 14 coincides, and the gas can flow through the valve.

A person may operate the handle whenever necessary to open and close the gas valve, but the handle may be automatically operated according to the surrounding conditions. In fact, gas valves have a commercially available structure that can be opened and closed automatically by mounting an electric device on the handle shaft. FIG. 2A is a perspective view showing the appearance of a transmission device for operating a gas valve, and FIG. 2B is a perspective view schematically showing the internal structure of the transmission device. The transmission 20 is mounted to the gearbox 19 of the gas valve 10 via a plurality of support legs 25. The drive sprocket 22 comes out of the transmission 20, and the power of the drive sprocket 22 is transmitted to the valve sprocket 23 through the chain 24. Accordingly, when the transmission 20 operates to rotate the drive sprocket 22, the valve sprocket 23 rotates by the chain 24, and the handle shaft 18 is turned to rotate the worm gear 13 inside the gearbox 19. The ball 14 is operated. This is the same as manually operating the handle.

Referring to Figure 2b will be described the internal structure and specific operation of the valve operation transmission 20. The drive gear 27 is attached to the rotating shaft of the electric motor 26, and this drive gear 27 and the 1st intermediate gear 28 are meshed. A first pinion 29 is formed on an axis of the first intermediate gear 28, and the first pinion 29 and the second intermediate gear 30 mesh with each other. A second pinion 31 is formed on the axis of the second intermediate gear 30 so that the second pinion 31 and the sprocket drive gear 32 mesh with each other. Therefore, the rotational force of the electric motor 26 is transmitted to the sprocket drive gear 32. The drive sprocket 22 described in FIG. 2A is coupled to the shaft 33 of the sprocket drive gear 32 and is connected to the valve sprocket 23 fixed to the handle shaft 18 by the chain 24. The handle shaft 18 rotates according to the rotation of the valve sprocket 23 and the worm gear 13 rotates accordingly to operate the ball 14 as described above.

Thus, a particular consideration in operating the valve with the transmission is that the motor 26 should be stopped at the rotational limit of the worm gear 13. The rotation limit point of the worm gear refers to a position at which the worm gear 13 no longer rotates when the ball 14 opens and closes the gas valve due to the rotation of the worm gear. When turning the handle manually, a detent can be forcibly stopped by installing a detent at the rotational limit of the worm gear 13, but when the handle is turned by using the electric motor 26, the detent is forcibly turned by the detent. If the motor is overloaded, the motor is overloaded and damaged, so that a mechanism for detecting the rotational limit of the worm gear 13 and turning the motor on and off is required separately. To this end, the valve shaft connected to the rotary shaft of the worm gear 13 is extended upward to configure the switch pressing shaft 17a. A switch pusher 17b is formed on a part of the upper end of the switch pusher shaft 17a, and two micro switches 34a and 34b are provided around the switch pusher 17b. Each of these microswitches is selectively operated according to the position of the switch pusher 17b in charge of the valve open position and the valve close position. That is, when the worm gear 13 rotates to reach the rotation limit point, the switch push 17b of the switch push shaft 17a operates the corresponding micro switch 34a or 34b. The power lines of the motor 26 are connected to the micro switches 34a and 34b to turn the motor 26 on and off. The position of the microswitches 34a and 34b should be adjusted to actually coincide with the limit of rotation of the worm gear 13. Hereinafter, the rotational limit point of the worm gear is referred to as "valve opening and closing limit point".

The conventional electric gas valve opening and closing device configured as described above has some disadvantages. First, since gas valve producers assemble electric vehicles on gas valves and market them, when gas valve producers do not produce electric devices together and receive electric motors separately and assemble them, the size and shape of each gas valve is different. Therefore, the design of the transmission must be different, and it becomes cumbersome in terms of material management and production management.

Second, in regulating the opening and closing limit of the valve, when the switch push shaft 17a is broken or slightly displaced because the micro switch is operated according to the rotation of the worm gear, a large rotational error occurs and the on / off of the motor is not properly controlled. Happens a lot.

It is an object of the present invention to provide a gas valve operation transmission apparatus that can be easily mounted on any size or shape gas valve and separately detects an opening and closing limit of the valve without an error.

Figure 1a is a perspective view showing the appearance of a general gas valve.

Figure 1b is a perspective view showing a structure installed inside the gas valve.

Fig. 2A is a perspective view showing a conventional gas valve operation transmission apparatus mounted on a gas valve.

Figure 2b is a diagram of the internal configuration of a conventional gas valve operation transmission device.

Figure 3 is a perspective view showing that the gas valve operation transmission apparatus for mounting the gas valve according to the present invention.

Figure 4a is a perspective view showing a distance between sprockets applied to the gas valve operation transmission device according to the present invention.

4B is a perspective view showing a double bolt used in FIG. 4A.

Figure 5 is an internal configuration of the gas valve operation transmission apparatus according to the present invention.

<Description of Major Symbols in Drawing>

Valve Body (10) Gas Inlet / Outlet (16)

Ball (14) Ball Hole (15)

Gearbox (19) Valve Shaft (17)

Worm Gear (13) Handle Shaft (18)

Handle (11) Handle Shaft Gear (12)

Supporting Leg (25) Power Transmission (20)

Drive Sprocket (22) Chain (24)

Valve Sprocket (23) Electric Motor (26)

Drive Gear (27) First Intermediate Gear (28)

First Pinion (29) Second Intermediate Gear (30)

2nd pinion (31) sprocket drive gear (32)

Shaft 33 of sprocket drive gear Switch push shaft 17a

Switch pusher (17b) microswitch (34a, 34b)

Transmission (40) Stationary Piece (41)

Fixed piece (41) Moving piece (42)

Tightening Bolts (43a, 43b) Drive Sprockets (44)

Drive sprocket fixing plate (45) Valve sprocket fixing plate (46)

Double Bolt (47a, 47b) First Screw Part 48

2nd screw part (49) Bolt head (50)

Thread part (53) Female thread (51)

Switch pusher (52) microswitch (34a, 34b)

In order to achieve the above objects, in the gas valve operating electric apparatus according to the present invention, the electric motor body can be easily mounted to the outside of the gas valve using a clamp mechanism. In addition, in order to correspond to the size or shape of the gas valve, a device for adjusting the distance between the drive sprocket and the valve sprocket was added, and the device for detecting the opening and closing limit of the valve was improved to accurately turn on and off the motor.

Hereinafter, with reference to the drawings will be described for the gas valve operation transmission apparatus according to the present invention. First, the external features will be described. 3 shows a method of mounting the transmission 40 according to the present invention to the gear box 19 of the upper gas valve body 10. The fixing piece 41 is coupled to the lower portion of the body of the transmission 40, and the fixing piece 41 is coupled to the movable piece 42 and the fastening bolts 43a and 43b to the gearbox 19 of the gas valve 10. ). In the conventional transmission device described with reference to FIG. 2a, the transmission device body 20 is fixed with the support legs 25, but according to the present invention, the clamping mechanism combining the fixing piece 41 and the movable piece 42 outside the gas valve according to the present invention. Secure the transmission. Although two clamping bolts 43a and 43b are shown, three or four clamping bolts may be used to increase the tightening strength. Fixing the apparatus by the clamp in this way is obvious to the person skilled in the art.

4A and 4B show other features of the present invention, and show a structure for adjusting the distance between the drive sprocket coming from the transmission body and the valve sprocket of the gas valve. The transmission according to the present invention can be mounted on any size or shape gas valve, but it is necessary to adjust the spacing between both sprockets accordingly. Therefore, the drive sprocket fixing plate 45 for fixing the drive sprocket 44 coming out of the transmission 40 and the valve sprocket fixing plate 46 for fixing the valve sprocket 23 of the gas valve are added, and the distance between these fixing plates. In order to control the two specially processed double bolts (47a, 47b) was used. This double bolt is shown in Fig. 4b. Although both of the bolt heads 50 have threads 48 and 49, the threads of the first screw portion 48 and the second screw portion 49 have different directions. For example, if the thread of the first screw portion 48 is a left screw, the thread of the second screw portion 49 is a right screw.

When the drive sprocket fixing plate 45 is fixed to the body of the transmission 40 and the drive sprocket fixing plate 45 and the valve sprocket fixing plate 46 are coupled to each other by double bolts 47a and 47b as shown in FIG. 4a, double bolts ( Since the screw directions of the 47a and 47b are different from each other, the distance between the driving sprocket fixing plate 45 and the valve sprocket fixing plate 46 becomes longer and narrower as the bolt head 50 is turned. In this way, the transmission 40 according to the present invention can be mounted to any size or shape gas valve.

The operation of the gas valve operation transmission device 40 according to the present invention is the same as the conventional transmission device (20). However, as shown in Figure 5, the switch unit for detecting the opening and closing limit of the worm gear is different from the conventional one. Referring to FIG. 5, the female part 51 is attached to the screw part 53 on the shaft 33 of the sprocket drive gear 32. As shown in FIG. Here, the sprocket drive gear shaft 33 serves as a lead screw, and as the sprocket drive gear 32 rotates, the female screw 51 moves horizontally as shown by the arrow direction. The switch pusher 52 is attached to the side surface of the female screw 51 so that the micro switches 34a and 34b can be pressed. When the positions of the microswitches 34a and 34b are properly adjusted and positioned at the opening and closing limits of the valves, the motors can be turned on and off by regulating the opening and closing limits of the valves by the moving distance of the female screw 51. Operations other than those described above are the same as those of the conventional transmission 20.

As described above, according to the present invention, since the gas valve and the electric device can be manufactured separately and can be arbitrarily mounted as a clamp mechanism, even if both are distributed through separate paths, they can be easily combined in the final production state, and the gas Even if the size or shape of the valve is different, the distance between the driving sprocket and the valve sprocket can be adjusted, and the open / close limit point of the valve is sensed by the lead screw method, so that the motor can be turned on and off without error.

Claims (3)

Body 40; An electric motor 26 embedded in the body; A drive gear 27 coupled to the rotating shaft of the motor in the body; A first intermediate gear 28 engaged with the drive gear in the body; A first pinion 29 formed on an axis of the first intermediate gear; A second intermediate gear 30 engaged with the first pinion in the body; A second pinion 31 formed on an axis of the second intermediate gear; A sprocket drive gear 32 engaged with the second pinion in the body and the shaft 33 being exposed out of the body; A drive sprocket 22 coupled to the shaft 33 of the sprocket drive gear exposed out of the body; It consists of a chain 24 connecting the drive sprocket and the valve sprocket 23 of the gas valve, by rotating the worm gear 13 engaged with the handle shaft 18 of the gas valve 10 by the power of the electric motor 26. In the transmission device for opening and closing the gas valve, The fixing piece 41 is coupled to the lower portion of the body 40, and the movable piece 42 is coupled to the fixing pieces 41 by tightening bolts 43a and 43b to fix the transmission body 40 to the fixing piece ( 41) and the movable piece 42 can be mounted on the gas valve (10) by tightening the gas valve (10). According to claim 1, wherein the drive sprocket 22 is coupled to the drive sprocket fixed plate 45 attached to the body, the valve sprocket 23 is coupled to the valve sprocket fixed plate 46, drive sprocket fixed plate 45 And the valve sprocket fixing plate 46 are coupled to each other by double bolts 47a and 47b formed with both the left and right screws of the bolt head, and between the drive sprocket 22 and the valve sprocket 23 as the double bolt is turned. Gas valve operation transmission device, characterized in that the distance changes. 3. A screw thread (53) is formed in the shaft (33) of the sprocket drive gear (32), and the female screw (51) is coupled to the screw thread according to the rotation of the sprocket drive gear (32). The female screw 51 moves horizontally, the switch pusher 52 protrudes on the outer surface of the female screw 51, and the micro switch is operated by the switch pusher 52 on the distance at which the female screw 51 moves horizontally. A gas valve operation transmission apparatus characterized in that the (34a, 34b) is provided.