A reverse-proof diaphragm gas meter

Abstract

The utility model discloses a prevent reverse film -coated gas meter, include: the spacing part and locking part, alarm part of being all arranged in the meter body, spacing part includes the ratchet wheel of being set on the valve cover and with its same rotation, restraint pole and the tooth, restraint pole sets up at valve cover one side, and its top is rotatably connected with the tooth, and the rotatable joint of tooth is equipped with torsion spring, locking part is rotatably connected with the tooth, alarm part sets up on the meter body and is separablely connected with locking part, the utility model discloses, when the valve cover accidental reverse, ratchet wheel synchronous rotation drives the tooth reverse, and the tooth reverses to the predetermined posture, and locking part restricts the tooth rotation and makes alarm unit work, the tooth prevents the valve cover rotation through ratchet wheel, prevents gas meter reverse counting, guarantees the measurement accuracy, and the alarm unit informs the staff of the abnormality in time simultaneously, so that the staff can handle in time.

Description

Technical Field

[0001] This utility model relates to the field of metering instrument technology, and in particular to a reverse-resistant diaphragm gas meter. Background Technology

[0002] Diaphragm gas meters are gas flow meters used to measure gas consumption and are widely used in both residential and commercial sectors.

[0003] However, most existing diaphragm gas meters on the market do not have an effective anti-reverse structure. When the gas supply conditions are abnormal or the equipment is improperly installed, causing the airflow direction to be opposite to the specified direction, the gas meter is in a reverse airflow state and its meter reading is reversed, thus affecting the metering when the gas meter is working normally. Moreover, it is difficult for staff to detect the abnormality in time, affecting the metering accuracy. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings by providing a reverse-flow diaphragm gas meter that stops metering when the gas flow reverses, thus ensuring metering accuracy during normal operation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a reverse-rotation diaphragm gas meter, comprising: a limiting component and a locking component, and an alarm component, all of which are disposed in the meter body; The limiting component includes a ratchet, a constraint rod, and a locking tooth that are sleeved on the valve cover and rotate together with it; The constraint rod is disposed on one side of the valve cover, and its top is rotatably connected to the locking tooth; The locking teeth are connected to the ratchet and are used to constrain the ratchet to rotate in the opposite direction; A torsion spring is provided at the rotatable connection of the locking tooth to provide torque for the locking tooth to rotate toward the ratchet; The locking component is rotatably connected to the locking tooth and is used to lock the locking tooth; The alarm component is mounted on the meter body and is detachably connected to the locking component, and is used to send signals to staff.

[0006] Furthermore, a limiting groove is provided at the top of the locking tooth; The locking component includes a locking frame and an elastic unit that are vertically slidably inserted into the watch body; The insertion end of the locking frame contacts the top of the locking tooth and corresponds to the limiting groove, thereby constraining the rotation of the locking tooth; The elastic unit is disposed between the locking frame and the watch body, and is used to apply a vertically downward elastic force to the locking frame.

[0007] Furthermore, the constraint rod is provided with an arc-shaped groove; The locking tooth is provided with a slider that is slidably disposed in the slide groove, and the locking tooth drives the slider to rotate together around the axis of the constraint rod as the center; The groove has a space for the locking teeth to rotate in both directions, which is used to constrain the rotation range of the locking teeth.

[0008] Furthermore, the alarm component includes an alarm unit and a touch unit, both of which are mounted on the meter body and connected to an external control unit via signals; The extended end of the locking frame is provided with a pressure block that can be detachably connected to the touch unit. The pressure block sends a working signal to the alarm unit through the touch unit.

[0009] Furthermore, a pressure relief pipe is provided in the meter body to divert the gas at the meter body's outlet to its inlet. A pressure relief valve is provided at the inlet of the pressure relief pipe for opening and closing the pressure relief pipe; A one-way valve is provided at the outlet of the pressure relief pipe to guide the gas in the pressure relief pipe to the air inlet of the instrument body and prevent it from flowing back.

[0010] Furthermore, a pad is provided at the end of the tooth that contacts the ratchet.

[0011] The beneficial effects of this utility model are reflected in: In this invention, when the valve cover is accidentally reversed, the ratchet rotates synchronously to drive the locking teeth to reverse. After the locking teeth reverse to the predetermined position, the locking component constrains the rotation of the locking teeth and activates the alarm unit. At this time, the locking teeth prevent the valve cover from rotating through the ratchet, thereby preventing the gas meter from counting in reverse and ensuring the metering accuracy when the gas meter is working normally. At the same time, the alarm unit notifies the staff of the abnormality as soon as possible so that the staff can deal with it in a timely manner. Attached Figure Description

[0012] Figure 1 This is a perspective view of a reverse-rotation diaphragm gas meter according to the present invention. Figure 2 This is a structural view of the limiting component; Figure 3 This is a cross-sectional view of a reverse-rotation diaphragm gas meter according to the present invention. Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a structural view of the locking teeth.

[0013] In the picture: 01. Instrument body; 02. Valve cover; 1. Limiting component; 11. Ratchet; 12. Constraint rod; 121. Slide groove; 13. Clamping tooth; 131. Limiting groove; 132. Slider; 2. Locking component; 21. Locking frame; 22. Elastic unit; 3. Alarm component; 31. Alarm unit; 32. Contact unit; 4. Contact block; 5. Pressure relief pipe; 51. Pressure relief valve; 52. Check valve; 6. Gasket. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0015] Please see Figure 1-5 This utility model discloses a reverse-rotation diaphragm gas meter, including: a limiting component 1 and a locking component 2, and an alarm component 3, all of which are disposed in the meter body 01; The limiting component 1 includes a ratchet 11, a constraint rod 12, and a locking tooth 13 that are sleeved on the valve cover 02 and rotate together with it; The constraint rod 12 is located on one side of the valve cover 02, and its top is rotatably connected to the locking tooth 13. The locking tooth 13 is connected to and detachably locked in the tooth groove of the ratchet 11 to constrain the ratchet 11 to rotate in the opposite direction. The rotatable connection of the locking tooth 13 is provided with a torsion spring (not shown in the figure) to provide torque for the locking tooth 13 to rotate in the direction of the ratchet, so that it is always connected to the ratchet 11. The locking component 2 is rotatably connected to the locking tooth 13 and is used to lock the locking tooth 13 in a reversed posture. The alarm component 3 is mounted on the meter body 01 and is detachably connected to the locking component 2, and is used to send signals to the staff.

[0016] In practice, when the gas meter is working normally, each gas metering chamber (not shown in the figure) drives the valve cover 02 to rotate in the specified direction through the transmission part. At this time, the ratchet 11 rotates together with the valve cover 02 and drives the locking tooth 13 to rotate away from the valve cover 02. At this time, the torsion spring is compressed and always provides the locking tooth 13 with the torque to rotate in the ratchet direction, so that the locking tooth 13 periodically exits the groove of the ratchet 11, and the gas meter counts normally. When the airflow reverses, the gas preferentially enters the gas metering chamber near the outlet. The transmission unit drives the valve cover 02 to reverse. At this time, the locking tooth 13 is engaged in the groove of the ratchet 11 and rotates in the opposite direction. When the locking tooth 13 reverses to the predetermined position, the locking component 2 locks the current position of the locking tooth 13 to constrain the rotation of the ratchet 11, thereby constraining the rotation of the valve cover 02 and preventing the gas meter from reading in the opposite direction. At the same time, the locking component 2 drives the alarm component 3 to work to send a signal to the staff.

[0017] In this invention, when the valve cover 02 is accidentally reversed, the ratchet 11 rotates synchronously to drive the locking tooth 13 to reverse. After the locking tooth 13 is reversed to the predetermined position, the locking component 2 constrains the rotation of the locking tooth 13 and activates the alarm unit 31. At this time, the locking tooth 13 prevents the valve cover 02 from rotating through the ratchet 11, thereby preventing the gas meter from counting in reverse and ensuring the metering accuracy when the gas meter is working normally. At the same time, the alarm unit 31 notifies the staff of the abnormality as soon as possible so that the staff can deal with it in a timely manner.

[0018] In one embodiment, the top of the locking tooth 13 is provided with a non-circular limiting groove 131; The locking component 2 includes a locking bracket 21 that is vertically slidably inserted into the watch body 01. Its insertion end contacts the top of the locking tooth 13 and corresponds to the limiting groove 131. When the locking tooth 13 rotates to a predetermined position, the locking bracket 21 can be inserted into the limiting groove 131. An elastic unit 22 is provided between the locking frame 21 and the watch body 01 to apply a vertically downward elastic force to the locking frame 21.

[0019] With this design, when the ratchet 11 drives the locking tooth 13 to reverse to the predetermined posture, the limiting groove 131 corresponds to the insertion end of the locking frame 21. At this time, the elastic unit 22 loses its constraint and drives the locking frame 21 to descend. The locking frame 21 is inserted into the limiting groove 131 to constrain the rotation of the locking tooth 13, and the corresponding end of the locking tooth 13 is already locked in the corresponding tooth groove of the ratchet 11 to constrain its rotation. After the fault was resolved, the staff pulled up the locking bracket 21 to remove it from the limiting groove 131. The torsion spring at the rotating part of the locking tooth 13 lost its constraint and caused the locking tooth 13 to rotate. At this time, the limiting groove 131 and the locking bracket 21 were misaligned, and the insertion end of the locking bracket 21 abutted against the top of the locking tooth 13 again.

[0020] Preferably, the elastic unit 22 can be a spring from the prior art.

[0021] It should be noted that the rotation arc of the locking tooth 13 when it reverses to the predetermined posture is less than the rotation arc of the locking tooth 13 when it exits the tooth groove of the ratchet 11, so that when the locking frame 21 constrains the locking tooth 13, the locking tooth 13 is still in the tooth groove and constrains the ratchet 11 to rotate.

[0022] In one embodiment, the constraint rod 12 is provided with an arc-shaped groove 121; The tooth 13 is equipped with a slider 132 that is slidably disposed in the slide groove 121. The tooth 13 drives the slider 132 to rotate together around the axis of the constraint rod 12. The slide groove 121 has a space for the locking teeth 13 to rotate in both directions, which is used to constrain the rotation range of the locking teeth 13; When the locking tooth 13 rotates to the position corresponding to the locking frame 21, the slide groove 121 constrains the locking tooth 13 to continue rotating.

[0023] With this design, when the valve cover 02 rotates in the specified direction, the locking tooth 13 is pushed away from the valve cover 02 by the ratchet 11. At this time, the slide groove 121 has enough space for the locking tooth 13 to rotate in the predetermined direction, so that the locking tooth 13 will not interfere with the rotation of the ratchet 11. When the locking tooth 13 rotates in the opposite direction to the posture corresponding to the locking frame 21, the slider 132 contacts the corresponding end of the slide groove 121. At this time, the constraint rod 12 prevents the locking tooth 13 from continuing to rotate and provides enough time for the locking frame 21 to be inserted into the limiting groove 131, thus avoiding the locking tooth 13 from rotating too much and causing the locking frame to fail to be inserted into the limiting groove, and further improving the connection stability of the locking frame 21.

[0024] In one embodiment, the alarm component 3 includes an alarm unit 31 and a touch unit 32, both disposed on the meter body 01 and connected to an external control unit. The alarm unit 31 is used to send abnormal signals to staff; The extended end of the locking frame 21 is provided with a pressing block 4 that can be detachably connected to the touch unit 32. When the pressing block 4 contacts the touch unit 32, the touch unit 32 sends a working signal to the alarm unit 31 through the control unit.

[0025] With this design, when the lock bracket descends and is inserted into the limiting slot 131, the touch block 4 descends along with it and contacts the touch unit 32. At this time, the touch unit 32 sends a signal to the alarm unit 31 through the control unit, so that the alarm unit 31 notifies the staff that an abnormality has occurred in the gas meter. After troubleshooting, the staff can pull up the locking bracket 21 to separate the pressure block 4 from the contact unit 32, and the alarm unit 31 will stop working.

[0026] Preferably, the touch unit 32 can be a contact switch in the prior art; Preferably, the alarm unit 31 can be a buzzer, which is a technology in the prior art.

[0027] In one embodiment, a pressure relief pipe 5 is provided in the meter body 01, with its inlet connected to the air outlet of the meter body 01 and its outlet connected to the air inlet of the meter body 01, for guiding the gas at the air outlet of the meter body 01 to its air inlet. The pressure relief pipe 5 is equipped with a pressure relief valve 51 at its inlet, which is used to open and close the pressure relief pipe 5. The outlet of the pressure relief pipe 5 is equipped with a one-way valve 52, which is used to guide the gas in the pressure relief pipe 5 to the air inlet of the instrument body 01 and prevent it from flowing back.

[0028] With this design, when the valve cover 02 is rotated by the locking tooth 13, the opening and closing posture of each valve cannot be determined. When the gas is continuously supplied to the meter body 01 and it is difficult to flow effectively, the pressure inside the meter body 01 rises until it exceeds the predetermined value of the pressure relief valve 51. At this time, the pressure relief valve 51 opens, and the gas can bypass each gas metering chamber through the pressure relief pipe 5 and flow out from the pipe at the gas inlet of the meter body 01, avoiding pressure overload in the pipe and reducing safety hazards. When the pipeline is normally ventilated, the gas at the gas inlet of the meter body 01 cannot enter the gas flow channel through the one-way valve 52, and the pressure in the meter body 01 is much lower than the predetermined pressure value of the pressure relief valve 51. The pressure relief pipe 5 is closed, which will not affect the normal flow of gas.

[0029] In one embodiment, the end of the tooth 13 that contacts the ratchet is provided with a pad 6 made of a material with good wear resistance.

[0030] With this design, when the ratchet is working normally, the shim 6 can effectively reduce the noise generated when it hits the ratchet, while reducing the wear of the locking teeth 13 and ensuring the working life of the locking teeth 13.

[0031] Preferably, the pad 6 can be made of materials such as polyurethane and nylon, which have good wear resistance and noise reduction.

[0032] It should be noted that the gasket 6 and the retaining tooth 13 can be connected by bolts to facilitate the replacement of the gasket 6 by the staff.

[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] Additionally, "multiple" refers to two or more.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reverse-flow diaphragm gas meter, characterized in that, include: The limiting component (1), locking component (2), and alarm component (3) are all installed in the body (01); The limiting component (1) includes a ratchet (11), a constraint rod (12), and a locking tooth (13) that are sleeved on the valve cover (02) and rotate together with it; The constraint rod (12) is disposed on one side of the valve cover (02), and its top is rotatably connected to the locking tooth (13); The locking tooth (13) is connected to the ratchet (11) and is used to constrain the ratchet (11) to rotate in the opposite direction; The rotatable connection of the pawl (13) is provided with a torsion spring, which is used to provide the pawl (13) with a torque to rotate in the direction of the ratchet (11); The locking component (2) is rotatably connected to the locking tooth (13) for locking the locking tooth (13); The alarm component (3) is mounted on the meter body (01) and is detachably connected to the locking component (2) for sending signals to staff.

2. The anti-reverse diaphragm gas meter according to claim 1, characterized in that: The top of the locking tooth (13) is provided with a limiting groove (131); The locking component (2) includes a locking frame (21) and an elastic unit (22) that are vertically slidably inserted into the body (01); The insertion end of the locking frame (21) contacts the top of the locking tooth (13) and corresponds to the limiting groove (131), which is used to constrain the rotation of the locking tooth (13); The elastic unit (22) is disposed between the locking frame (21) and the watch body (01) for applying a vertically downward elastic force to the locking frame (21).

3. The anti-reverse diaphragm gas meter according to claim 1, characterized in that: The constraint rod (12) is provided with an arc-shaped sliding groove (121); The locking tooth (13) is provided with a slider (132) that is slidably disposed in the slide groove (121). The locking tooth (13) drives the slider (132) to rotate together around the axis of the constraint rod (12). The groove (121) has a space for the locking tooth (13) to rotate in both directions, which is used to constrain the rotation range of the locking tooth (13).

4. The anti-reverse diaphragm gas meter according to claim 2, characterized in that: The alarm component (3) includes an alarm unit (31) and a touch unit (32) both mounted on the meter body (01) and connected to an external control unit. The extended end of the locking frame (21) is provided with a pressing block (4) that can be detachably connected to the touch unit (32). The pressing block (4) sends a working signal to the alarm unit (31) through the touch unit (32).

5. The anti-reverse diaphragm gas meter according to claim 1, characterized in that: The meter body (01) is provided with a pressure relief pipe (5) for diverting the gas at the outlet of the meter body (01) to its inlet. The pressure relief pipe (5) is provided with a pressure relief valve (51) at the inlet, which is used to open and close the pressure relief pipe (5); A one-way valve (52) is provided at the outlet of the pressure relief pipe (5) to guide the gas in the pressure relief pipe (5) to the air inlet of the instrument body (01) and prevent it from flowing back.

6. The anti-reverse diaphragm gas meter according to claim 1, characterized in that: A pad (6) is provided at the end of the tooth (13) that contacts the ratchet (11).

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