A gas tightness testing device for gas meter calibration

Abstract

This utility model discloses an airtightness testing device for gas meter calibration, including a lower housing connected to a wall, an upper housing cover hinged to the lower housing for opening and closing, and a testing chamber for inserting the gas meter between the upper housing cover and the lower housing. The lower housing has a first side hole for an inlet pipe to pass through and a second side hole for an outlet pipe to pass through. A pressure gauge is provided on the upper housing cover or the lower housing, the pressure gauge including a measuring head extending into the testing chamber and a dial located outside the testing chamber. This airtightness testing device features high integration, convenient testing, complete overall functions, and strong practicality.

Description

Technical Field

[0001] This utility model relates to the technical field of gas meter testing equipment, and more specifically, it relates to an airtightness testing device for gas meter calibration. Background Technology

[0002] In the production and calibration of gas meters, airtightness is a core indicator for ensuring their safe use. Leakage can lead to gas escape and safety hazards. Existing gas meter airtightness testing methods often use external pipes to connect the testing equipment, requiring separate sealing of the gas meter's inlet and outlet. This process is cumbersome, and improper sealing can easily distort the test results. Some testing devices lack integrated structures, requiring significant space and hindering efficient calibration in mass production scenarios. Furthermore, traditional testing methods demand high operator skills, making rapid and intuitive leak detection difficult, thus affecting calibration efficiency and resulting in overall poor performance. Therefore, this invention proposes an airtightness testing device for gas meter calibration. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gas tightness testing device for gas meter calibration. This gas tightness testing device has the characteristics of high integration and convenient testing.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: The gas tightness testing device for gas meter calibration involved in this utility model includes a lower box body connected to a wall, an upper box cover hinged to the lower box body for opening and closing, and a testing chamber for placing the gas meter is formed between the upper box cover and the lower box body. The lower box body is provided with a first side hole for the gas inlet pipe to pass through and a second side hole for the gas outlet pipe to pass through. A pressure gauge is provided on the upper box cover or the lower box body. The pressure gauge includes a measuring head that extends into the testing chamber and a dial located outside the testing chamber.

[0005] The present invention is further configured such that: a first sealed inner tube is provided in the first side hole and fitted on the air inlet pipe, and a first valve for inflation and deflation is provided on the first sealed inner tube, and the first valve extends to the outside of the detection chamber through a pipe; a second sealed inner tube is provided in the second side hole and fitted on the air outlet pipe, and a second valve for inflation and deflation is provided on the second sealed inner tube, and the second valve extends to the outside of the detection chamber through a pipe.

[0006] The present invention is further configured such that: the wall of the first side hole is provided with a first annular groove in the shape of a closed ring for positioning the first sealing inner tube; the wall of the second side hole is provided with a second annular groove in the shape of a closed ring for positioning the second sealing inner tube.

[0007] The present invention is further configured such that: a sealing gasket is provided on the mating surface of the upper box cover and the lower box body, and the sealing gasket is provided on the upper box cover and / or the lower box body.

[0008] The present invention is further configured such that the pressure gauge is located on the lower housing.

[0009] In summary, this utility model has the following beneficial effects: 1. The upper cover and lower body form a sealed testing chamber, which, together with the pre-set side hole for the pipe to pass through, eliminates the need for additional complex sealing operations on the gas meter, simplifying the testing process and improving calibration efficiency.

[0010] 2. The pressure gauge directly displays the pressure change in the detection chamber. When there is a gas leak, it can be judged intuitively by the dial reading, which reduces the reliance on the operator's skills. In addition, the overall device has a compact structure and saves placement space. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the patent claims of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0013] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0014] Example 1 See Figure 1 and Figure 2 As shown, the gas tightness testing device for gas meter calibration involved in this embodiment includes a lower box 1 connected to a wall. The lower box 1 has an upper box cover 2 that is hinged for opening and closing. The upper box cover 2 and the lower box 1 form a testing chamber 3 for the gas meter 100 to be placed in. The lower box 1 is provided with a first side hole 4 for the gas inlet pipe 101 to pass through and a second side hole 5 for the gas outlet pipe 102 to pass through. The lower box 1 is provided with a pressure gauge 6, which includes a measuring head 601 that extends into the testing chamber and a dial 602 located outside the testing chamber.

[0015] Furthermore, the first side hole 4 is provided with a first sealing inner tube 7 fitted on the air inlet pipe 101, and the first sealing inner tube 7 is provided with a first valve 8 for inflation and deflation, and the first valve 8 extends to the outside of the detection chamber 3 through a pipe; the second side hole 5 is provided with a second sealing inner tube 9 fitted on the air outlet pipe 102, and the second sealing inner tube 9 is provided with a second valve 10 for inflation and deflation, and the second valve 10 extends to the outside of the detection chamber 3 through a pipe.

[0016] When using the gas meter, place it into the testing chamber of the lower housing, aligning the gas inlet with the first side hole and the gas outlet with the second side hole, and connect the inlet and outlet pipes respectively. Close the upper housing cover to create a sealed space in the testing chamber. Inject the gas meter with the set pressure of testing gas (such as air) through the inlet pipe, and then close the gas path and let it stand. Observe the pressure gauge dial. If the pointer reading is stable, the gas meter is airtight. If the pointer reading rises (due to increased pressure inside the chamber caused by leakage), a leak is detected. The degree of leakage can be judged based on the pressure change.

[0017] Of course, to enhance the seal, the first and second sealing inner tubes can be pressurized before testing to achieve a good sealing effect at the side hole, thereby making the test results more accurate.

[0018] Example 2 See Figure 1 and Figure 2 As shown, the gas tightness testing device for gas meter calibration involved in this embodiment is further configured based on embodiment 1, wherein the first side hole 4 has a first annular groove 11 in the shape of a closed ring for positioning the first sealing inner tube; and the second side hole 5 has a second annular groove 12 in the shape of a closed ring for positioning the second sealing inner tube.

[0019] In this embodiment, the first annular groove 11 is used for positioning the first sealed inner tube during installation; the second annular groove 12 is used for positioning the second sealed inner tube during installation.

[0020] Example 3 See Figure 1 and Figure 2 As shown, the gas tightness testing device for gas meter calibration involved in this embodiment is further configured, based on embodiment 1, to have a sealing gasket (not shown) on the mating surface of the upper cover 2 and the lower body 1, and the sealing gasket is provided on the lower body 1.

[0021] In this embodiment, a sealing gasket is provided to enhance the sealing effect.

[0022] The gas meter calibration gas tightness testing device involved in this utility model forms a sealed testing chamber through the upper cover and lower body, and with the pre-set side hole for pipes to pass through, there is no need for additional complex sealing operations on the gas meter, which simplifies the testing process and improves calibration efficiency. In addition, the pressure gauge directly displays the pressure change in the testing chamber, and when there is a leak in the gas meter, it can be judged intuitively through the dial reading, which reduces the dependence on the operator's skills. Moreover, the overall device has a compact structure, saves placement space, has complete functions, and is highly practical.

[0023] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0024] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A gas tightness detecting device for gas meter calibration, characterized by, The device includes a lower housing connected to the wall, an upper housing hinged to the lower housing for opening and closing, and a detection chamber for inserting a gas meter between the upper housing and the lower housing. The lower housing has a first side hole for the gas inlet pipe to pass through and a second side hole for the gas outlet pipe to pass through. A pressure gauge is provided on the upper housing or the lower housing, and the pressure gauge includes a measuring head that extends into the detection chamber and a dial located outside the detection chamber.

2. The airtightness testing apparatus for gas meter verification according to claim 1, characterized by The first side hole is provided with a first sealed inner tube that is fitted onto the air inlet pipe. The first sealed inner tube is provided with a first valve for inflation and deflation. The first valve extends out of the detection chamber through a pipe. The second side hole is provided with a second sealed inner tube that is fitted onto the air outlet pipe. The second sealed inner tube is provided with a second valve for inflation and deflation. The second valve extends out of the detection chamber through a pipe.

3. The gas-tightness detection device for gas meter verification according to claim 2, characterized in that, The first side hole has a first annular groove on its wall for positioning the first sealing inner tube and forming a closed ring; the second side hole has a second annular groove on its wall for positioning the second sealing inner tube and forming a closed ring.

4. The leak detection apparatus for gas meter verification according to any one of claims 1 to 3, characterized in that, The mating surfaces of the upper lid and the lower box body are provided with sealing gaskets, which are located on the upper lid and / or the lower box body.

5. The gas tightness testing device for gas meter calibration according to claim 1, characterized in that, The pressure gauge is located on the lower housing.

Images