CN204879438U - Ration of bottle group device that leaks hunting - Google Patents

Abstract

The utility model discloses a ration of bottle group device that leaks hunting, sealing connection is being organized by the survey bottle, the ration is leaked hunting the device and is included that the balanced cavity of first balanced cavity, second, differential pressure take into account evacuating device, first balanced cavity has an opening, is surveyed in bottle group stretches into first balanced cavity from the opening part, is surveyed an outer wall and an opening contact segment sealing connection that the bottle was organized, first balanced cavity and the balanced cavity of second are connected respectively to the differential pressure gauge for measure the pressure difference in the two balanced cavitys, evacuating device can take out first balanced cavity and the balanced cavity of second to the same vacuum. The utility model discloses simple structure, it is convenient to install, and the suitable environment requires lowly, can go out to be surveyed the quantity of gas leakage of bottle group by quick quantitative measurement effectively, safe and reliable, the error is little.

Description

Quantitative leak detection device for bottle group

technical field

The utility model belongs to the field of leak detection devices, in particular to a quantitative leak detection device for detecting whether a container valve and the joint between the container and the container are tight.

Background technique

The leakage measurement of the container valve is often used to control the processing and installation process of the container and the valve. The main factors leading to the leakage of the bottle group are: 1. The connection between the bottle group and the container valve is unreliable, resulting in leakage; 2. The container The quality of the valve itself is unreliable and there are leakage points.

The traditional leak detection method of bottle group is to put the whole bottle group into the water pool and detect the leak by observing the air bubbles, but this process only relies on visual inspection for qualitative detection, and it is impossible to achieve specific quantitative measurement of leakage, and long-term immersion The bottle set will be corroded in water. Some domestic firefighting companies also cover the entire bottle group and then vacuumize it, and use the instrument to regularly collect the leaked gas and detect its gas composition to judge. However, the process cost is relatively high, and it is only suitable for measuring small volume bottle groups. Patent CN202091774 discloses a quantitative leak detection device for a fire extinguishing agent bottle group. The leak detection device can quickly and quantitatively detect the leakage of the bottle group, but it has the following problems: 1. Temperature changes in the air will cause thermal expansion and cooling shrinkage effect, which affects the detection accuracy, and there is a large error, so it needs to be tested in a constant temperature laboratory, which is not conducive to the detection on the construction site; It is not easy to fix and locate the detection device.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a quantitative leak detection device for a bottle group that has a simple structure and can quickly and quantitatively detect the leakage of the bottle group.

The technical scheme adopted by the utility model to solve the technical problem is: a quantitative leak detection device for a bottle group, which is sealed and connected to the measured bottle group, and the quantitative leak detection device includes a first balance chamber and a second balance chamber Body, differential pressure gauge and vacuuming device, the first balance chamber has an opening, the measured bottle group extends into the first balance chamber from the opening, and the outer wall of the measured bottle group is in sealing connection with the opening contact part; the differential pressure The meter is respectively connected to the first balance chamber and the second balance chamber for measuring the pressure difference in the two balance chambers; the vacuum pumping device can pump the first balance chamber and the second balance chamber to the same vacuum degree. The first balance chamber is connected to the measured bottle group by negative pressure adsorption. The connection is not only fast and simple but also tight, and the sealing is better. The first balance chamber and the second balance chamber are in a vacuum state to reduce thermal expansion caused by ambient temperature changes. The effect of cold shrinkage reduces the measurement error and lowers the requirements for the measurement environment. The differential pressure gauge can intuitively display the pressure difference between the first balance chamber and the second balance chamber, so as to quickly and quantitatively measure the gas leakage in the first balance chamber.

Further, it also includes a communication part connected to the vacuum device, the communication part includes a first conduit communicating with the first balance cavity and a second conduit communicating with the second balance cavity, the first conduit and the second conduit A first switch is arranged between them, the first conduit and the second conduit are connected with the vacuum device through a main pipe, and the second switch is arranged on the main pipe. The setting of the first switch and the second switch realizes the control of the initial same negative pressure value in the two balance chambers and the isolation during the test process. The first balance chamber and the second balance chamber can be evacuated at the same time by a vacuum device, which ensures that the first balance chamber and the second balance chamber have the same vacuum degree, that is, have the same initial negative pressure value .

Further, the second balance chamber is arranged on the periphery of the first balance chamber, and the lower part of the second balance chamber is connected to the outer wall of the first balance chamber by negative pressure adsorption. The first balance chamber and the second balance chamber are connected through negative pressure adsorption, so that the connection is tighter and the sealing performance is guaranteed.

Further, the second balance cavity is arranged on the periphery of the first balance cavity and is screwed to the outer wall of the first balance cavity.

Further, the second balance cavity is arranged on the periphery of the first balance cavity and integrally formed with the first balance cavity.

Further, the first balance cavity and the second balance cavity are set independently.

Further, a sealing member is provided at the connection part between the measured bottle group and the first balance cavity. The sealing member makes the sealing between the first balance cavity and the measured bottle group reliable.

Further, the seal is an O-ring.

Further, the vacuum device is an air pump.

The beneficial effects of the utility model are that the utility model has the advantages of simple structure, convenient installation, low application environment requirements, fast and effective quantitative measurement of the gas leakage of the measured bottle group, safety and reliability, and small error.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of a partial cross-sectional structure of the present invention.

Fig. 3 is a working principle diagram of the utility model.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the utility model. Obviously, the described The embodiments are only some of the embodiments of the present utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

Example 1

Referring to Fig. 1, Fig. 2 and Fig. 3, a quantitative leak detection device for a bottle group is covered above the measured bottle group 1, and the quantitative leak detection device includes a first balance chamber 2, a second balance chamber 3. Differential pressure gauge 4 and vacuum pumping device. The first balance chamber 2 is a hollow cylindrical structure with an opening at one end, and the bottle group 1 to be measured extends into the first balance chamber 2 from the opening, so that the container valve 11 of the bottle group 1 to be measured is located in the first balance chamber. Inside the cavity 2 , the opening of the first balance cavity 2 is in sealing connection with the outer wall of the measured bottle set 1 , that is, an airtight space is formed between the first balance cavity 2 and the measured bottle set 1 . The second balance chamber 3 is arranged on the periphery of the first balance chamber 2, that is, the outer wall of the first balance chamber 2 is the inner wall of the second balance chamber 3, and the outer wall of the second balance chamber 3 has a step shrinking inward. type structure, and its lower end also has an opening for the bottle group 1 to be measured to extend into. The top surfaces of the first balance chamber 2 and the second balance chamber 3 are on the same level, and a differential pressure gauge 4 is arranged on the top surface above the outer wall of the first balance chamber 2. Two pressure gauges on the differential pressure gauge 4 The pressure-taking channels, that is, the first pin 41 and the second pin 42 communicate with the first balance cavity 2 and the second balance cavity 3 respectively. Two vacuum devices can be respectively connected to the first balance chamber 2 and the second balance chamber 3, and the first balance chamber 2 and the second balance chamber 3 can be achieved by reading the displayed value on the vacuum device. The purpose of the same vacuum degree is the same negative pressure value. When the two balance cavities are at the same set negative pressure value, the communication between the two balance cavities and the outside is cut off.

After the vacuum device pumps out the air in the first balance chamber 2 and the second balance chamber 3 respectively, because the external air pressure is greater than the internal air pressure, the lower opening of the first balance chamber 2 and the measured bottle group 1 The outer wall is connected by adsorption. In order to increase the airtightness, a seal 6 can be provided on the contact connection part of the measured bottle group 1 and the first balance chamber 2. In this embodiment, the seal 6 is an O-shaped seal ring, and the second balance chamber The lower opening of the body 3 is connected to the outer wall of the first balance cavity 2 by adsorption. In this embodiment, the vacuum device is an air pump.

When measuring, cover the quantitative leak detection device over the side of the bottle group 1 with the container valve 11 to be tested, open the differential pressure gauge 4, and during the measurement, when there is leakage in the bottle group, the first balance chamber 2 will cause its internal pressure to increase due to the leaked gas, forming a pressure difference between the first balance chamber 2 and the second balance chamber 3. The differential pressure gauge 4 shows the pressure difference. According to the measured bottle group 1 The leakage rate of the measured bottle set 1 can be obtained by the coefficient of pressure variation caused by the leakage. This calculation method is a prior art and will not be repeated here.

Example 2

The difference between this embodiment and Embodiment 1 is that a communication part is provided on the top surface of the first balance chamber 2 and the second balance chamber 3 near the outer wall of the first balance chamber 2, and the communication part includes The first conduit 51 communicating with the outside from the first balance chamber 2 and the second conduit 52 communicating with the outside from the second balance chamber 3, the first conduit 51 and the second conduit 52 are connected through the main pipe 54 and connected with the pump The vacuum device is connected, so that the first balance chamber 2 and the second balance chamber 3 can be evacuated at the same time with one vacuum device, that is, the first balance chamber 2 and the second balance chamber 3 have the same vacuum same negative pressure. Between the first conduit 51 and the second conduit 52, a first switch 53 for controlling the connection and closure between the first balance cavity 2 and the second balance cavity 3 is provided, and the main pipe 54 is provided with a switch 53 for controlling the first balance. The cavity 2 and the second switch 55 of the communication relationship between the second balance cavity 3 and the outside world. Specifically, the communicating component may be a two-valve and three-way gate valve.

Referring to Fig. 3, when measuring, the quantitative leak detection device is covered on the side of the measured bottle group 1 with the container valve 11, the differential pressure gauge 4 is opened, the aspirating pump is connected to the main pipe 54, and the second valve is opened. A switch 53 and a second switch 55, start the suction pump to discharge the internal gas of the first balance chamber 2 and the second balance chamber 3 to the atmosphere through the connecting parts at the same time, and pump the two balance chambers to the set vacuum degree Turn off the second switch 55 first, and then turn off the first switch 53. Due to the effect of atmospheric pressure, the whole quantitative leak detection device is tightly adsorbed on the outer wall of the measured bottle group 1 . During the measurement process, when there is a leak in the bottle group, the internal pressure of the first balance chamber 2 will increase due to the leaked gas, forming a pressure difference between the first balance chamber 2 and the second balance chamber 3, The differential pressure gauge 4 shows the pressure difference, and the leakage of the measured bottle group 1 is obtained according to the pressure variation coefficient of the measured bottle group 1 due to leakage. This calculation method is a prior art and will not be repeated here. Other contents are the same as those in Embodiment 1, and will not be repeated here.

Example 3

The difference between this embodiment and Embodiment 1 is that the upper part of the outer wall of the first balance cavity 2 is provided with external threads, and the second balance cavity 3 is a hollow cylindrical structure with an inwardly shrinking convex edge structure at the upper end. There is an internal thread along the top, the upper part of the second balance chamber 3 is screwed to the upper part of the first balance chamber 2, and the negative pressure of the lower part of the second balance chamber 3 is adsorbed on the outer wall of the first balance chamber 2 to form an airtight seal Similarly, the lower part of the second balance chamber 3 can also be screwed on the outer wall of the first balance chamber 2 . Other contents are the same as those in Embodiment 1 and will not be repeated here.

Example 4

The difference between this embodiment and Embodiment 1 is that the second balance cavity 3 and the first balance cavity 2 are integrally formed and fixedly connected to the periphery of the first balance cavity 2, and the second balance cavity 3 can be Airtight containers of any shape.

Example 5

The difference between this embodiment and Embodiment 1 is that the second balance chamber 3 is a closed container that is different from the first balance chamber 2 and exists independently of it, and it can be arranged in any shape.

The above-mentioned specific embodiments are used to explain the utility model, rather than to limit the utility model. Within the spirit of the utility model and the scope of protection of the claims, any modifications and changes made to the utility model fall into the scope of the utility model. scope of protection.

Claims (9)

1. A quantitative leak detection device for a bottle set, which is sealed and connected to the measured bottle set (1), characterized in that: the quantitative leak detection device includes a first balance chamber (2), a second balance chamber ( 3), a differential pressure gauge (4) and a vacuum device, the first balance chamber (2) has an opening, and the measured bottle group (1) extends into the first balance chamber (2) from the opening, and is The outer wall of the measuring bottle group (1) is sealed and connected with the opening contact part; the differential pressure gauge (4) is connected to the first balance chamber (2) and the second balance chamber (3) respectively, and is used to measure the pressure in the two balance chambers Poor; the vacuum device can evacuate the first balance cavity (2) and the second balance cavity (3) to the same vacuum degree. 2. The quantitative leak detection device for the bottle set according to claim 1, characterized in that it also includes a connecting part connected to the vacuum device, and the connecting part includes a first conduit communicating with the first balance chamber (2) (51) and the second conduit (52) communicating with the second balance cavity (3), a first switch (53) is provided between the first conduit (51) and the second conduit (52), and the first conduit (51) and the second conduit (52) are connected to the vacuum device through the main pipe (54), and the main pipe (54) is provided with a second switch (55). 3. The quantitative leak detection device for a bottle set according to claim 1, characterized in that: the second balance chamber (3) is set on the periphery of the first balance chamber (2), and the second balance chamber The lower part of (3) is connected to the outer wall of the first balance cavity (2) by negative pressure adsorption. 4. The quantitative leak detection device for bottle sets according to claim 1, characterized in that: the second balance cavity (3) is set on the periphery of the first balance cavity (2), and is screwed to the first balance cavity on the outer wall of the cavity (2). 5. The quantitative leak detection device for a bottle set according to claim 1, characterized in that: the second balance chamber (3) is arranged on the periphery of the first balance chamber (2), and is connected with the first balance chamber (2) One-piece molding. 6. The quantitative leak detection device for a bottle set according to claim 1, characterized in that: the first balance chamber (2) and the second balance chamber (3) are set independently. 7. The quantitative leak detection device for a bottle set according to claim 1, characterized in that: a seal (6) is provided at the connecting part between the bottle set to be tested (1) and the first balance chamber (2). 8. The quantitative leak detection device for bottle sets according to claim 7, characterized in that: the sealing member (6) is an O-ring. 9. The quantitative leak detection device for bottle sets according to claim 1, characterized in that: the vacuum device is an air pump.