KR101380733B1 - A back flow prevention device for gas meter - Google Patents

Abstract

The present invention is to prevent the communication of the gas in the normal direction and the communication of the gas in the reverse direction, having an inlet and outlet with an upper case having a counter unit for integration according to the use of gas, and the lower case coupled to the upper case A rotary slider provided in the case and having a valve to control gas flow, a cover closed with a valve seat to control the flow of gas by the valve while maintaining airtight below the valve; A partition forming a gas flow path including a through hole formed, a discharge hole formed at one side of the through hole, and a communication hole communicating with the through hole, the discharge hole, and the diaphragm chamber by partition walls formed in all directions around the through hole. In the gas meter configured to include;
And a backflow prevention device coupled to the through hole to enable communication of the gas in the forward direction and to block the communication of the gas in the reverse direction, wherein the backflow prevention device includes an apparatus body having the same shape as the through hole; And a distribution hole formed in the center of the device body to allow gas to flow therethrough, and a prevention means installed at the lower side of the device body to communicate the gas in the forward direction and through the reverse direction.

Description

Backflow prevention device for gas meter {A BACK FLOW PREVENTION DEVICE FOR GAS METER}

The present invention relates to a backflow prevention device for a gas meter, and more particularly, to providing a backflow prevention device that can prevent malicious use at the source by preventing the gas from being supplied when the gas meter is installed in a reverse direction. will be.

Gas meter is connected to the gas pipe that supplies gas to home, office or commercial building, and it is a device to measure the amount of gas used by the user so that it can be charged according to the use.

Conventional gas meter 100 for achieving this purpose is shown in Figure 4,

It is composed of a lower case 101 and the upper case 102, the upper case 102 is provided on one side of the inlet and outlet 103, 104 and the upper case 102 for the inlet and outlet of the gas for integration And a counter unit for counting the discharged gas.

The lower case 101 is provided with a diaphragm as a means for pumping the gas introduced into the left and right sides, and the upper case 102 rotates by the pumping of the diaphragm while the gas flows into or out of the diaphragm. It is provided with a rotary slider having a valve to control the.

Under the valve, a cover having a valve seat is closed by bonding so that gas flow by the valve can be controlled while maintaining airtightness between the upper and lower cases 101 and 102.

A partition 112 is formed at one side of the lower case 101 to form a flow path of the gas introduced by the separating wall 111, and the partition 112 is formed in the center of the through hole 113. And a discharge hole 114 formed at one side thereof is connected to the passage, and the through hole 113 and the discharge hole 114 and the diaphragm chamber communicate with each other by the partition wall 116 formed in all directions around the through hole 113. The communication hole 118 is formed so that the gas is supplied to the place of use through the valve 107 and the through hole 113 and the discharge hole 114 through the diaphragm.

As described above, the gas is introduced to the counter part by a rotary slider connected to the valve in the process of supplying gas through the diaphragm, the valve, the through hole and the discharge hole so that some users may connect the gas meter in the reverse direction. In many cases, a normal count does not occur.

For example, an inlet formed in the upper case is connected to a pipe (inlet side) installed to supply gas to the room, and the gas is supplied to a place such as a gas stove through a gas meter to the outlet formed in the upper case. It is normal to count as much as the gas is used in connection with the pipe to

By intentionally connecting the outlet of the gas meter to the inlet pipe and combining the inlet with the pipe connected to the place of use, the gas can be supplied normally. This happens.

In this way, by using a gas meter combined in the reverse direction before the meter reading and in the forward direction when the meter is used, it becomes practically difficult for the meter or inspector to detect unfavorable conditions in the field.

As such, the use of the gas is normal and the count is reversed. Therefore, the gas supply source cannot impose normal costs for supplying, operating, and managing the gas, which causes serious side effects to other good users.

In order to solve this problem, the counter is installed to prevent the counter installed inside the gas meter from operating in reverse direction. In this case, the counter is not reversed when the gas meter is installed in the reverse direction. As a result, it has not solved the fundamental problem that makes it impossible to block malicious and unpleasant gas sources at the source.

Accordingly, the present invention has been invented to solve the above problems, having an inlet and outlet and having an upper case having a counter for integration according to the use of gas, and a lower case coupled to the upper case to control the gas flow. A rotary slider having a valve, a cover closed with a valve seat so that gas flow by the valve can be controlled while keeping the airtight under the valve, a through hole formed at the center under the cover, and one side of the through hole. A gas meter including a discharge portion formed in a portion and a partition portion forming a gas flow path including a communication hole communicating with the through hole, the discharge hole, and the diaphragm chamber by partition walls formed in all directions around the through hole;

And a backflow prevention device coupled to the through hole to enable communication of the gas in the forward direction and to block the communication of the gas in the reverse direction, wherein the backflow prevention device includes an apparatus body having the same shape as the through hole; A distribution hole formed in the center of the apparatus body so that gas can flow, and a prevention means installed at a lower side of the apparatus body to communicate the gas in the forward direction and to prevent the gas in the reverse direction;

Since gas is communicated in the normal direction and gas is blocked in the reverse direction, malicious use of the gas meter can be prevented, thereby achieving the purpose of improving the quality of the gas meter.

When the gas meter is installed in the reverse direction, regardless of the forward or reverse operation of the counter installed inside the gas meter, the gas is prevented from being used by preventing the use of gas by blocking the communication of gas at the source. It is an invention having various effects, such as preventing the economic burden on normal gas users.

1 is a perspective view showing a non-return device for a gas meter to which the technique of the present invention is applied.
Figure 2 is a cross-sectional view taken along line A-A showing a backflow prevention device for a gas meter to which the technique of the present invention is applied.
Figure 3 is a cross-sectional view of the open state showing the backflow prevention device for a gas meter to which the technique of the present invention is applied.
Figure 4 is an exploded perspective view showing an application state of the backflow prevention device for a gas meter to which the technique of the present invention is applied.
5 is a perspective view showing another example of a non-return device for a gas meter to which the technique of the present invention is applied.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a non-return device for a gas meter to which the technique of the present invention is applied, FIG. 2 is a cross-sectional view taken along line A-A showing the non-return device for a gas meter to which the technique of the present invention is applied, and FIG. Fig. 4 is an exploded perspective view showing an applied state of the gas meter backflow prevention device to which the technology of the present invention is applied, and Fig. 5 is an exploded perspective view showing the application of the technology of the present invention. It demonstrates together as a perspective view which shows another example of the backflow prevention device for gas meters.

The conventional gas meter 100 is composed of a lower case 101 and the upper case 102, the upper case 102, the inlet and outlet ports 103 and 104 for the inlet and outlet of gas for integration and the upper case ( It is provided on one side of the 102 is provided with a counter unit for counting the gas flowing in and out.

The lower case 101 is provided with a diaphragm as a means for pumping the gas introduced into the left and right sides, and the upper case 102 rotates by the pumping of the diaphragm while the gas flows into or out of the diaphragm. It is provided with a rotary slider having a valve to control the.

Under the valve, a cover having a valve seat is closed by bonding so that gas flow by the valve can be controlled while maintaining airtightness between the upper and lower cases 101 and 102.

A partition 112 is formed at one side of the lower case 101 to form a flow path of the gas introduced by the separating wall 111, and the partition 112 is formed in the center of the through hole 113. And a discharge hole 114 formed at one side thereof is connected to the passage, and the through hole 113 and the discharge hole 114 and the diaphragm chamber communicate with each other by the partition wall 116 formed in all directions around the through hole 113. The communication hole 118 is formed so that the gas is supplied to the place of use through the valve 107 and the through hole 113 and the discharge hole 114 through the diaphragm.

In the present invention is coupled to the through hole 113 is closed with a cover 110 to enable the communication of the gas in the forward direction and further includes a backflow prevention device 120 for blocking the communication of gas in the reverse direction malicious gas It is characterized in that the source can be blocked.

The backflow prevention device 120 is provided with the same cylindrical device body 121 as the through-hole 113 to be inserted into the through-hole 113 of the gas meter 100, the device body 121 and the through-hole ( 113, a conventional locking means composed of a combination such as a projection and a projection groove may be provided to prevent the device body 121 from being excessively inserted into the through hole 113.

A distribution hole 122 is formed in the center of the device body 121 so that gas can flow, and the prevention means 125 communicates the gas in the forward direction and prevents the gas from flowing in the reverse direction at the lower side of the device body 121. When the gas meter 100 is installed or connected in the reverse direction to prevent the communication of the gas.

The preventing means 125 protrudes the bracket 126 downward on both sides of the lower end of the device body 121, and the bracket 126 has a plate-shaped opening and closing valve 127 for opening and closing the distribution hole 122. When the gas communication in the normal direction by combining the opening and closing valve 127 is opened and in the reverse gas communication when the opening and closing valve 127 is in close contact with the device body 121 to block the gas communication.

At the rear of the on-off valve 127, the on-off valve 127 is easily opened by the pressure (force) pushed by the gas during gas communication, and the on-off valve 127 is moist or oily due to low pressure at the beginning of use. A state where a fine gap 128 is formed between the device body 121 and the opening / closing valve 127 even in a state in which there is no gas communication to prevent the device body 121 from being in close contact with the device body 121 due to a foreign matter such as It has a weight 130 to maintain.

The position of the bracket 126 is formed to be biased in any direction from the center of the axis of the device body 121 to maximize the opening angle of the opening and closing valve 127, the device body 121 of the position where the bracket 126 is formed ) Forms a joint surface 131 inclined so as to facilitate the flow of gas while the weight 130 does not interfere with the device body 121 when the on-off valve 127 is opened.

The angle of the contact surface 131 will be formed in consideration of the connection state of the on-off valve 127 and the weight 130, the weight 130 also the lower end of the device body 121 and the on-off valve 127 It will be apparent that the weight and the like are determined by numerical calculation so as to maintain the gap 128 formed therebetween.

The weight 130 is formed integrally with the same material as the on-off valve 127 or integrally injection molded core material 132 made of a different material such as metal or formed a core material groove 133 Core material 132 may be carried out in a variety of forms, such as can be replaced and mounted as needed.

If the shape of the device body 121 also has a circular cross section of the through-hole 113 as shown in Figure 1 may be configured in a cylindrical shape, as shown in Figure 5 the opening surface in any one direction of the through-hole 113 In the case of having a shape 135, it is a matter of course that the shapes of the device body 121 and the opening / closing valve 127 are adapted to the through hole 113 according to the shape thereof.

Looking at the state of use of the backflow prevention device 120 for a gas meter 100 to which the technique of the present invention is applied as described above are as follows.

The non-return device 120 is inserted into the through hole 113 when the gas meter 100 is assembled, and then closed with the cover 110. In this case, the opening / closing valve 127 is integrally formed by the weight 130. The device body 121 has a bottom surface and a gap 128.

As described above, since the opening / closing valve 127 is not connected to the device body 121 and maintains the gap 128 at an initial stage (the gas meter does not operate), the opening / closing valve 127 is opened by the water or oil. The close contact with the 121 can prevent the phenomenon that does not fall easily.

In this state, when the gas meter 100 is normally installed, when gas is supplied for gas use, the gas moves to the discharge hole 114 through the through hole 113 when the gas communicates in the forward direction. By opening and closing the on-off valve 127 by the pressure of the gas communication does not cause any trouble.

In this process, since the pressure of the gas transmitted to the on / off valve 127 is greater than the weight of the weight 130 integrally formed on the on / off valve 127, the weight 130 is easily opened to the device body 121. The bracket 126 is rotated from the starting point to the rear of the device body 121, and is connected to the connecting surface 131 formed to be inclined behind the device body 121 to interfere with the device body 121. It does not cause the on-off valve 127 will not interfere.

When the gas meter 100 is installed in a reverse direction, the gas flows into the discharge port 104 and the reverse flow is supplied to the user through the inlet 103 through the through hole 113 and the communication hole 118. do.

At this time, when the bottom of the on-off valve 127 constituting the backflow prevention device 120 coupled to the through-hole 113 is pushed by the pressure of the gas when trying to communicate from the discharge hole 114 to the through-hole 113 Since the valve 127 is in close contact with the bottom surface of the device body 121, the gas is no longer able to communicate with the through hole 113.

In particular, the backflow prevention device to which the technique of the present invention is applied cannot be visually confirmed because it is installed inside the gas meter, so the gas meter is installed in the reverse direction, and if the gas is not supplied, it is returned to its original state. Will be prevented in advance.

As described above, the present invention prevents malicious use of the gas meter because the gas is communicated in the normal direction and the gas is blocked in the reverse direction, thereby improving the quality of the gas meter and thus having an advantage in external competitiveness. Has the advantage.

100; Gas meter 111; Separation wall
112; Partition wall 113; Passage
114; Outlet hole 118; Communicator
120; Backflow prevention device 121; Device body
122; Distribution hole 125; Prevention measures
127; On-off valve 128; gap
130; wait

Claims (5)

An upper case having an inlet and an outlet and a counter unit for integration according to gas use;
A rotary slider provided in the lower case coupled to the upper case and having a valve to control gas flow;
A cover closed with a valve seat so that gas flow by the valve can be controlled while maintaining airtight below the valve;
Under the cover includes a through hole formed in the center, a discharge hole formed on one side of the through hole, and a communication hole communicating the through hole and the discharge hole and the diaphragm chamber by partition walls formed around the through hole in all directions. In the gas meter comprising a partition for forming a flow path;
An apparatus body provided in the same shape as the through hole, a distribution hole formed to allow gas to flow in the center of the apparatus body, and installed below the apparatus body to prevent the gas from communicating in the forward direction and preventing the gas from flowing in the reverse direction. And a backflow prevention device composed of means;
The preventing means includes a bracket protruding downward on both sides of the lower end of the device body;
An opening / closing valve coupled to the bracket for selecting opening and closing the distribution hole;
And a weight formed at the rear of the on / off valve to allow the on / off valve to be easily opened and closed by the pressure of the gas when gas is communicated. delete The method of claim 1, further comprising:
The apparatus body has a back flow prevention device for a gas meter, characterized in that for forming the connection surface inclined so that the gas flow is good without causing interference with the device body when opening and closing the valve. The method of claim 1, further comprising:
The weight is integrally formed with the same material as the on-off valve;
The weight is integrally injection-molded core material consisting of a valve and a heterogeneous material;
Forming a core groove in the weight, the backflow prevention device for a gas meter, characterized in that configured to replace the core material as needed. The method of claim 1, further comprising:
The device body and the on-off valve is a gas characterized in that a predetermined gap is formed even in the absence of gas communication to prevent the on-off valve is in close contact with the foreign body by the foreign material by the low pressure at the beginning of use Backflow prevention device for meter.

Images