Gas meter with backflow prevention function

Abstract

The utility model belongs to the technical field of gas meters, and discloses a gas meter with an anti-backflow function, which comprises a gas meter body, a gas inlet and a gas outlet are respectively arranged on two sides of the top of the gas meter body, a display screen is arranged on one side of the gas meter body, and a counter is arranged in the gas meter body. A mounting mechanism is arranged on the side, away from the display screen, of the gas meter body, the gas inlet end of the gas meter body is fixedly connected with a gas inlet pipe, the gas outlet end of the gas meter body is fixedly connected with a gas outlet pipe, a filtering device is mounted on the inner wall of the gas inlet pipe, and a spiral impeller is rotatably mounted on the inner wall of the gas outlet pipe. According to the gas meter, the gas outlet pipe is connected with the gas outlet end of the gas meter body, the spiral impeller is rotationally connected with the inner wall of the gas outlet pipe, when gas flows through the spiral impeller, the spiral impeller is driven to rotate, flowing of the gas is accelerated, the gas can pass through the side edge of the spiral impeller, and the situation that the gas outlet is blocked by the movable cover plate is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas meters, and more specifically, particularly relates to a gas meter with an anti-backflow function. Background Art

[0002] The fuel people use for cooking has changed from conventional energy sources such as firewood and coal, which waste resources and cause serious pollution, to natural gas and coal gas, and even electricity. Here, the gas meter will play its role. Its automatic accumulation function allows those who use natural gas or pipeline gas to easily know how much gas they have used, so that they can pay according to the cubic meters of gas consumed each month.

[0003] Patent application number CN202021455218.3 discloses a gas meter with anti-backflow function, including a gas meter body and a filter plate, an air inlet pipe is installed above the gas meter body, and an air outlet pipe is installed on the right side of the air inlet pipe, the filter plate is installed inside the air inlet pipe, a mesh surface is installed inside the filter plate, a fixing pin is connected to the position of the fastening spring away from the vertical center line of the air inlet pipe, a movable cover plate is installed inside the air outlet pipe, and a hinge is connected to the left end of the movable cover plate, an outer rod is connected to the top of the movable cover plate, and an inner rod is connected to the top of the outer rod, a limit plate is installed at the lower right of the movable cover plate, and a ventilation hole is provided at the position of the heat sink away from the vertical center line of the gas meter body. The gas meter with anti-backflow function is provided with a mesh surface that can filter impurities in the gas to prevent impurities from entering the gas meter and damaging the device.

[0004] However, the above technical solution adopts a method of rotating the movable cover plate by means of a hinge, and a gap is left between the movable cover plate and the air outlet pipe when the movable cover plate is opened, so as to provide a channel for gas circulation. However, during the use of the above device, the movable cover plate is easy to completely block the pipe, resulting in gas being unable to flow, and the above device is not convenient to install and disassemble during use, which reduces the practicality of the device.

[0005] Therefore, in view of this, research and improvement are conducted on the existing structure and defects, and a gas meter with anti-backflow function is provided, in order to achieve a more practical purpose. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a gas meter with anti-backflow function, which is achieved by the following specific technical means:

[0007] A gas meter with an anti-backflow function comprises a gas meter body, wherein an air inlet and an air outlet are respectively arranged on both sides of the top of the gas meter body, a display screen is arranged on one side of the gas meter body, and a counter is installed inside the gas meter body, and a mounting mechanism is provided on the side of the gas meter body away from the display screen, an air inlet pipe is fixedly connected to the air inlet end of the gas meter body, an air outlet pipe is fixedly connected to the air outlet end of the gas meter body, a filtering device is installed on the inner wall of the air inlet pipe, a spiral impeller is rotatably installed on the inner wall of the air outlet pipe, a protective shell is rotatably installed on the gas meter body at the top of the display screen, and the inner wall size of the protective shell is matched with the outer wall size of the display screen.

[0008] Furthermore, the filtering device includes a fixing frame, which is fixedly connected to the outer wall of the air inlet pipe, and a pair of telescopic rods are symmetrically welded to the inner wall of the fixing frame, and the outer walls of the pair of telescopic rods are slidably sleeved with a first spring, the pair of telescopic rods are fixedly connected to a baffle at one end away from the fixing frame, and the pair of baffles are respectively slidably connected to the inner wall of the air inlet pipe at one end away from the telescopic rods.

[0009] Furthermore, a filter plate is clamped on the inner wall of the air inlet pipe, and the bottom ends of a pair of baffles are respectively abutted against both sides of the top end of the filter plate.

[0010] Furthermore, the mounting mechanism includes a mounting plate, the inner wall of the mounting plate is slidably connected to a connecting block, the connecting block is fixedly connected to the outer wall of the gas meter body, mounting grooves are provided on both sides of the connecting block, and a pair of mounting grooves are slidably connected to the inside of a block.

[0011] Furthermore, a second spring is connected inside each of the pair of mounting grooves, and one end of the second spring is fixedly connected to the clamping block.

[0012] Furthermore, a card slot is provided at a corresponding position of the inner wall of the mounting plate and the card block, and the card block and the card slot are engaged with each other.

[0013] Furthermore, a slide groove is provided at the top of the slot, the top of the slide groove passes through the top of the mounting plate, a push rod is slidably connected inside the slide groove, and the bottom end of the push rod extends to the inside of the slot.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. A gas meter with anti-backflow function in the utility model connects the outlet pipe to the outlet end of the gas meter body, and uses the spiral impeller connected by the inner wall of the outlet pipe to rotate. When the gas flows through the spiral impeller, the spiral impeller is driven to rotate, which accelerates the flow of the gas. The gas will pass through the side of the spiral impeller, and the gas outlet will not be blocked by the movable cover. When the gas flows back, the backflow of the gas will be blocked by the spiral impeller, which can effectively prevent the gas from flowing back.

[0016] 2. A gas meter with an anti-backflow function in the utility model is provided, by inserting a connection block fixedly connected to the gas meter body into the mounting plate, and using the inner wall of the mounting plate to squeeze the card block, the card block is forced to shrink and squeeze the second spring, so that the elastic potential energy of the second spring increases, and when the position of the card block moves to correspond to the card slot provided on the inner wall of the mounting plate, the elastic potential energy of the second spring is used to push the card block into the card slot, so as to achieve a fixed connection between the mounting plate and the connection block, and then achieve rapid installation of the gas meter body, and by pushing the push rod to move in the slide slot, the card block in the card slot is withdrawn, so that the gas meter body can be quickly disassembled, and the installation convenience is greatly improved;

[0017] 3. A gas meter with an anti-backflow function in the utility model can provide protection for the display screen on the gas meter body by rotating the protective shell connected to the top of the display screen, thereby preventing the display screen from being damaged by external forces and affecting normal meter reading. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the anti-backflow structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the utility model;

[0021] Figure 4 For this utility model Figure 3 Schematic diagram of the structure at A in the middle;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 6 For this utility model Figure 5 Schematic diagram of the structure at point B in the middle.

[0024] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0025] 1. Gas meter body; 2. Protective shell; 3. Inlet pipe; 4. Filter device; 401. Fixing frame; 402. Telescopic rod; 403. First spring; 404. Baffle; 405. Filter plate; 5. Outlet pipe; 6. Spiral impeller; 7. Mounting mechanism; 701. Mounting plate; 702. Connecting block; 703. Second spring; 704. Block; 705. Push rod. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0027] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example:

[0030] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 and attached Figure 6 As shown:

[0031] The utility model provides a gas meter with an anti-backflow function, comprising a gas meter body 1, wherein an air inlet and an air outlet are respectively arranged on both sides of the top of the gas meter body 1, a display screen is arranged on one side of the gas meter body 1, and a counter is installed inside the gas meter body 1, and a mounting mechanism 7 is provided on the side of the gas meter body 1 away from the display screen, an air inlet pipe 3 is fixedly connected to the air inlet end of the gas meter body 1, an air outlet pipe 5 is fixedly connected to the air outlet end of the gas meter body 1, a filtering device 4 is installed on the inner wall of the air inlet pipe 3, a spiral impeller 6 is rotatably installed on the inner wall of the air outlet pipe 5, a protective shell 2 is rotatably installed on the gas meter body 1 at the top of the display screen, and the inner wall size of the protective shell 2 is matched with the outer wall size of the display screen.

[0032] Among them, the filtering device 4 includes a fixed frame 401, which is fixedly connected to the outer wall of the air inlet pipe 3, and a pair of telescopic rods 402 are symmetrically welded to the inner wall of the fixed frame 401, and the outer walls of the pair of telescopic rods 402 are slidably sleeved with a first spring 403, and the pair of telescopic rods 402 are fixedly connected to a baffle 404 at one end away from the fixed frame 401, and the pair of baffles 404 are respectively slidably connected to the inner wall of the air inlet pipe 3 at one end away from the telescopic rods 402.

[0033] Among them, the inner wall of the intake pipe 3 is clamped with a filter plate 405, and the bottom ends of a pair of baffles 404 are respectively abutted against the two sides of the top of the filter plate 405, and the filter plate 405 is installed in the inner wall of the intake pipe 3. During the installation process, the outer wall of the filter plate 405 squeezes the baffle 404 to shrink, and at the same time, the baffle 404 squeezes the first spring 403, so that the elastic potential energy of the first spring 403 increases and the telescopic rod 402 shrinks. When the filter plate 405 is installed to the corresponding position, the filter plate 405 moves to the bottom of the baffle 404, and the filter plate 405 releases the squeezing of the baffle 404. At this time, the elasticity of the first spring 403 is used to squeeze the filter plate 405. The potential energy of the filter plate 405 pushes the baffle 404 and moves the baffle 404 to the top of the filter plate 405, limiting the filter plate 405 to prevent it from moving during use, and then using the filter plate 405 to filter impurities in the gas entering the intake pipe 3 to prevent impurities from entering the gas meter and causing damage to the device. When the filter plate 405 needs to be replaced, it is only necessary to manually press the baffle 404 to release the limit on the filter plate 405, and then take out the filter plate 405 and replace it, and at the same time use the elastic potential energy of the first spring 403 to reset the baffle 404.

[0034] Among them, the installation mechanism 7 includes a mounting plate 701, the inner wall of the mounting plate 701 is slidably connected with a connecting block 702, the connecting block 702 is fixedly connected to the outer wall of the gas meter body 1, and mounting grooves are provided on both sides of the connecting block 702, and a pair of mounting grooves are slidably connected inside with a clamping block 704.

[0035] The inside of the pair of installation grooves are both connected with a second spring 703 , and one end of the second spring 703 is fixedly connected to the clamping block 704 .

[0036] Among them, the inner wall of the installation plate 701 and the corresponding position of the clamping block 704 are provided with a clamping groove, and the clamping block 704 and the clamping groove are engaged with each other.

[0037] A slide groove is provided at the top of the card slot, and the top of the slide groove passes through the top of the mounting plate 701. A push rod 705 is slidably connected inside the slide groove, and the bottom end of the push rod 705 extends to the inside of the card slot.

[0038] The working principle of this embodiment is as follows: when in use, the connecting block 702 fixedly connected to the gas meter body 1 is inserted into the mounting plate 701, and the inner wall of the mounting plate 701 is used to squeeze the card block 704. The card block 704 is forced to shrink and squeeze the second spring 703, so that the elastic potential energy of the second spring 703 increases. When the position of the card block 704 moves to correspond to the card slot provided on the inner wall of the mounting plate 701, the elastic potential energy of the second spring 703 is used to push the card block 704 into the card slot, so as to achieve a fixed connection between the mounting plate 701 and the connecting block 702, thereby achieving a quick installation of the gas meter body 1. By pushing the push rod 705 to move in the slide slot, the card block 704 in the card slot is withdrawn, which can achieve The quick disassembly of the gas meter body 1 greatly improves the convenience of installation. Subsequently, the outlet pipe 5 is connected to the outlet end of the gas meter body 1, and the spiral impeller 6 connected to the inner wall of the outlet pipe 5 is rotated. When the gas flows through the spiral impeller 6, the spiral impeller 6 is driven to rotate, thereby accelerating the flow of gas. The gas will pass through the side of the spiral impeller 6, and the gas outlet will not be blocked by the movable cover. When the gas flows back, the backflow of the gas will be blocked by the spiral impeller 6, which can effectively prevent the gas from flowing back. Finally, by rotating the protective shell 2 connected to the top of the display screen, the display screen on the gas meter body 1 can be protected to prevent the display screen from being damaged by external forces and affecting normal meter reading.

[0039] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

Claims

1. A gas meter with a backflow prevention function, comprising a gas meter body (1), wherein both sides of the top of the gas meter body (1) are respectively provided with an air inlet and an air outlet, a display screen is provided on one side of the gas meter body (1), and a counter is installed inside the gas meter body (1), characterized in that: The gas meter body (1) is provided with a mounting mechanism (7) on a side away from the display screen; the gas inlet end of the gas meter body (1) is fixedly connected to an inlet pipe (3); the gas outlet end of the gas meter body (1) is fixedly connected to an outlet pipe (5); a filter device (4) is installed on the inner wall of the inlet pipe (3); a spiral impeller (6) is rotatably installed on the inner wall of the outlet pipe (5); a protective shell (2) is rotatably installed on the gas meter body (1) at a position located at the top of the display screen, and the inner wall size of the protective shell (2) is mutually compatible with the outer wall size of the display screen.

2. The gas meter with anti-backflow function as claimed in claim 1, characterized in that: The filtering device (4) comprises a fixing frame (401), the fixing frame (401) being fixedly connected to the outer wall of the air intake pipe (3), a pair of telescopic rods (402) being symmetrically welded to the inner wall of the fixing frame (401), a first spring (403) being slidably sleeved on the outer walls of the pair of telescopic rods (402), a baffle (404) being fixedly connected to one end of the pair of telescopic rods (402) away from the fixing frame (401), and a pair of baffles (404) being slidably connected to the inner wall of the air intake pipe (3) at one end of the pair of telescopic rods (402) away from the fixing frame (401).

3. The gas meter with anti-backflow function as claimed in claim 2, characterized in that: The inner wall of the air inlet pipe (3) is clamped with a filter plate (405), and the bottom ends of a pair of baffles (404) are respectively abutted against both sides of the top end of the filter plate (405).

4. The gas meter with anti-backflow function as claimed in claim 1, characterized in that: The mounting mechanism (7) comprises a mounting plate (701), the inner wall of the mounting plate (701) being slidably connected to a connecting block (702), the connecting block (702) being fixedly connected to the outer wall of the gas meter body (1), both sides of the connecting block (702) being provided with mounting grooves, and a pair of the mounting grooves being slidably connected to the interiors of the two mounting grooves being provided with clamping blocks (704).

5. The gas meter with anti-backflow function as claimed in claim 4, characterized in that: A second spring (703) is connected to the inside of each of the pair of mounting grooves, and one end of the second spring (703) is fixedly connected to the clamping block (704).

6. The gas meter with anti-backflow function as claimed in claim 4, characterized in that: A card slot is provided at a corresponding position between the inner wall of the mounting plate (701) and the card block (704), and the card block (704) and the card slot are engaged with each other.

7. The gas meter with anti-backflow function as claimed in claim 6, characterized in that: A slide groove is provided at the top of the slot, and the top of the slide groove passes through the top of the mounting plate (701). A push rod (705) is slidably connected inside the slide groove, and the bottom end of the push rod (705) extends into the inside of the slot.

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