Natural gas pipeline airtightness detection device

Abstract

The utility model discloses a natural gas pipeline air tightness detection device which comprises a transparent plate, a U-shaped pipe cavity is arranged in the transparent plate, half-cavity water is filled in the U-shaped pipe cavity, a graduated scale is arranged on the front side face or the rear side face of the transparent plate, and a left pipe opening and a right pipe opening which are communicated with the U-shaped pipe cavity are arranged at the upper end of the transparent plate. The left pipe opening is communicated with an inflation pipe and a pressure detection hose through a three-way connector or a three-way valve, the inflation pipe is communicated with an inflation ball, and the inflation ball comprises a balloon, a one-way valve and an inflation valve. The device is simple in structure, low in cost, safe and reliable, and can visually display the pressure and airtightness of the natural gas pipeline.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipeline gas tightness detection technical field especially relates to a natural gas pipeline gas tightness detection device. BACKGROUND

[0002] With the rapid advancement of urbanization, the laying range of city natural gas pipe network is increasingly extensive, and natural gas is increasingly popular in daily life of residents due to its clean and efficient characteristics, and becomes one of main energy. The gas tightness of indoor pipeline and indoor pipeline as the terminal part of city natural gas pipe network is directly related to the gas safety of users. Especially the newly installed pipeline, must carry out strict gas tightness detection, this is important for guaranteeing the safety of life and property of users, and improving the overall reliability and stability of gas supply system.

[0003] At present, commonly used gas tightness detection equipment such as electronic pressure sensor and pressure recorder can accurately measure pressure data, however, there are many disadvantages. On the one hand, these devices are generally high in cost and tedious in installation procedure, not only need external power supply support, but also require high professional maintenance, which makes them difficult to be widely applied in large-scale indoor and indoor pipeline detection. On the other hand, electronic equipment is easily affected by electromagnetic interference in complex and special gas environment, and the component aging problem is also prominent, these factors will seriously affect the accuracy and reliability of detection. In addition, the existing detection means has the disadvantage in data presentation, cannot directly show the pressure state, usually needs to rely on professional reading equipment or software platform to interpret data, which is inconvenient for ordinary users and field maintenance personnel to understand the pressure condition in time, and difficult to find potential safety hazards in time. Therefore, a new natural gas pipeline gas tightness detection device is urgently needed to overcome the limitations of the prior art and meet the actual detection needs. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the prior art problems, providing a natural gas pipeline gas tightness detection device, it simple structure, low cost, safe and reliable, can directly show the pressure and gas tightness of natural gas pipeline.

[0005] The utility model aims at solving the prior art problems, providing a natural gas pipeline gas tightness detection device, it simple structure, low cost, safe and reliable, can directly show the pressure and gas tightness of natural gas pipeline.

[0006] Preferably, the right pipe port valve is arranged on the right pipe port.

[0007] Preferably, the three-way valve comprises a lower pipe opening, an upper pipe opening and an inflation pipe opening, the lower pipe opening is communicated with the left pipe opening, the upper pipe opening is provided with an upper pipe opening valve, the upper pipe opening is communicated with a pressure detection hose, the inflation pipe opening is provided with an inflation pipe opening valve, and the inflation pipe opening is communicated with an inflation ball through an inflation pipe.

[0008] Preferably, the transparent plate block is embedded in a stainless steel plate groove.

[0009] Preferably, 2-3 U-shaped elastic pipe clamps for clamping the pressure detection hose are arranged on the left side or the right side of the stainless steel plate groove.

[0010] Preferably, a color floating ball is arranged on the water surface of the right U-shaped pipe cavity.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] The utility model discloses a U-shaped pipe cavity is equipped in the transparent plate block, half cavity water is filled in the U-shaped pipe cavity, the front side or the back side of the transparent plate block is equipped with a scale, when using, the pressure detection hose is connected on the pipeline to be detected, the manual inflation ball is given to the pipeline to be detected and the left side of the U-shaped pipe cavity, and the water column in the U-shaped pipe cavity is lowered on the left side and is raised on the right side, when the height difference of the right water column and the left water column reaches 5000Pa or more, stop inflating, and if the water column height difference does not change, it proves that the pipeline air tightness of detection meets the requirement. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the three-dimensional structure schematic diagram of the natural gas pipeline air tightness detection device of the utility model;

[0014] Figure 2 It is the A part structure enlarged view of Figure 1 ;

[0015] Figure 3 It is the front structure schematic diagram of the natural gas pipeline air tightness detection device of the utility model;

[0016] Figure 4 It is the B part structure enlarged view of Figure 3 ;

[0017] Figure 5 It is the C part structure enlarged view of Figure 3 ;

[0018] Figure 6 It is the D part structure enlarged view of Figure 3 ;

[0019] Figure 7 It is the front structure schematic diagram of the transparent plate block of the utility model;

[0020] Figure 8 is Figure 7 the E part structure enlarged view of;

[0021] Figure 9 is Figure 7 the F part structure enlarged view of;

[0022] Figure 10 is the three-dimensional structure schematic diagram of the stainless steel plate tank of the utility model;

[0023] Figure 11 is the three-dimensional structure schematic diagram of the three-way valve of the utility model.

[0024] In the drawing: 1 - stainless steel plate tank, 2 - transparent plate block, 3 - U-shaped cavity, 4 - water, 5 - scale, 6 - left pipe mouth, 7 - right pipe mouth, 8 - three-way valve, 9 - inflatable ball, 10 - pressure test hose, 11 - balloon, 12 - inflation pipe, 13 - one-way valve, 14 - inflation valve, 15 - right pipe mouth valve, 16 - lower pipe mouth, 17 - upper pipe mouth, 18 - inflation pipe mouth, 19 - upper pipe mouth valve, 20 - inflation pipe mouth valve, 21 - U-shaped elastic pipe clamp, 22 - color floating ball. DETAILED DESCRIPTION

[0025] The utility model will be described in detail below in combination with the drawings.

[0026] As Figures 1 to 11 shown, a natural gas pipeline gas tightness detection device, it includes stainless steel plate tank 1, in stainless steel plate tank 1 embeds and installs transparent plate block 2 of acrylic material, in transparent plate block 2 is equipped with U-shaped cavity 3, U-shaped cavity 3 is filled with half cavity water 4, the front side of transparent plate block 2 is equipped with scale 5, the upper end of transparent plate block 2 is equipped with left pipe mouth 6 and right pipe mouth 7 that communicate U-shaped cavity, three-way valve 8 is set up on left pipe mouth 6, right pipe mouth valve 15 is set up on right pipe mouth 7;The three-way valve 8 includes lower pipe mouth 16, upper pipe mouth 17 and inflation pipe mouth 18, lower pipe mouth 16 is connected with left pipe mouth 6, upper pipe mouth 17 is equipped with upper pipe mouth valve 19, upper pipe mouth 17 is connected with pressure test hose 10, inflation pipe mouth 18 is equipped with inflation pipe mouth valve 20, inflation pipe mouth 18 is connected with inflatable ball 9 through inflation pipe 12;Inflatable ball 9 includes balloon 11, one-way valve 13 and inflation valve 14.In the right side of stainless steel plate tank 1, two U-shaped elastic pipe clamps 21 that hold pressure test hose 10 are set up.In the water surface of right side U-shaped cavity 3, a color floating ball 22 is set up.

[0027] The working principle and operation steps of the utility model are as follows:

[0028] (1) after natural gas indoor pipeline or indoor pipeline is installed, the utility model is straightened on the ground or arbitrary mesa, and pressure test hose 10 is connected on the arbitrary pipe mouth of the closed indoor pipeline or indoor pipeline;

[0029] (2) open the right pipe orifice valve 15, the upper pipe orifice valve 19, the inflation pipe orifice valve 20 and the inflation valve 14, and inflate the manual balloon 11;

[0030] (3) during the inflation process, the left water column in the U-shaped tube cavity 3 drops and the right water column rises, and when the height difference between the left water column and the right water column reaches 5000 Pa, stop the inflation;

[0031] (4) close the inflation pipe orifice valve 20 and the inflation valve 14, and observe the pressure difference for 15 minutes, if the pressure difference decreases, it indicates that the natural gas inlet pipeline or the indoor pipeline does not meet the air tightness requirement, if the pressure difference remains unchanged or increases slightly (the slight increase in the pressure difference may be caused by the change in the pipeline temperature), it indicates that the natural gas inlet pipeline or the indoor pipeline meets the air tightness requirement.

[0032] (5) after the detection is completed, close the right pipe orifice valve 15, the upper pipe orifice valve 19 and the inflation pipe orifice valve 20 to prevent the water in the U-shaped tube cavity 3 from flowing out, so as to be used for the next detection.

[0033] The specific implementation of the above embodiment is only used to illustrate the technical scheme of the utility model, and is not limited to the protection scope of the utility model, and the simple modification or equivalent replacement of the technical scheme of the utility model by the ordinary skilled in the art does not deviate from the essence and scope of the technical scheme of the utility model.

Claims

1. A natural gas pipeline tightness detection device comprising a transparent plate, characterized in that: The U-shaped tube cavity is filled with half-cavity water, the front side or the back side of the transparent plate is provided with a scale, the upper end of the transparent plate is provided with a left tube port and a right tube port which are communicated with the U-shaped tube cavity, the left tube port is communicated with an inflation tube and a pressure checking hose through a tee joint or a tee valve, the inflation tube is communicated with an inflation ball, and the inflation ball comprises a balloon, a one-way valve and an inflation valve.

2. The natural gas pipeline gas tightness detection device according to claim 1, characterized in that: A right tube port valve is arranged on the right tube port.

3. The natural gas pipeline gas tightness detection device of claim 2, wherein: The tee valve comprises a lower tube port, an upper tube port and an inflation tube port, the lower tube port is communicated with the left tube port, the upper tube port is provided with an upper tube port valve, the upper tube port is communicated with the pressure checking hose, the inflation tube port is provided with an inflation tube port valve, and the inflation tube port is communicated with the inflation ball through the inflation tube.

4. The natural gas pipeline gas tightness detection device of claim 3, wherein: The transparent plate is embedded in a stainless steel plate groove.

5. The natural gas pipeline integrity testing apparatus of claim 4, wherein: 2-3 U-shaped elastic tube clamps for clamping the pressure checking hose are arranged on the left side or the right side of the stainless steel plate groove.

6. The natural gas pipeline integrity testing apparatus of claim 5, wherein: A color floating ball is arranged on the water surface of the right U-shaped tube cavity.

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