CN2805901Y

CN2805901Y - Pressure providing device

Info

Publication number: CN2805901Y
Application number: CN 200520113744
Authority: CN
Inventors: 郑建中; 罗刚; 庞雷
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2005-07-12
Filing date: 2005-07-12
Publication date: 2006-08-16
Anticipated expiration: 2015-07-12

Abstract

The utility model provides a pressure providing device which comprises a liquid packing vessel, an air bag and a measuring head, wherein the air bag is contained in the vessel and the opening of the air bag is hermetically connected with the opening of the vessel. The measuring head is arranged outside the vessel, and a connecting head of the measuring head is hermetically connected with the opening of the vessel. A main cavity chamber and a plurality of channels communicating the main cavity chamber outside the measuring head are arranged in the measuring head. A cavity communicated with the main cavity chamber is arranged in the connecting head and is communicated with the air bag. The pressure providing device provided by the utility model can be used in various occasions needing pressure, can continuously provide desired pressure in using, and has the advantages of favorable airtight performance, low cost and safe and convenient operation in the experiment process.

Description

The pressure generator

Technical field

The utility model relates to a kind of pressure generator.

Background technology

Need the working pressure generator, promptly a kind of device that can produce pressure as required in many pressure tests or test occasion.Usually, this pressure generator is used for providing the gas pressure of different pressure for it when detecting A/C pressure switch.In addition, this pressure generator also can be used for other occasions, for example is used for detecting the product that other need carry out pressure detecting, as the detection of detection of air-conditioning magnetic valve and other annex pressure.

In the prior art, for the situation that detects the A/C pressure switch performance, gas pressure is to provide by the nitrogen cylinder that utilizes pressure-reducing valve to charge and discharge nitrogen.But this device the time need use a large amount of nitrogen doing test, and for different pressure demand, also will often change nitrogen cylinder, thus continuity that can't guarantee test, and operating cost is high and inconvenient.In addition, also having a kind of method is to adopt the gas boosting pump, utilize the gas of the principle acquisition different pressures of cylinder piston, but it can not seal effectively, and operating cost is high and inconvenient.

The utility model content

At the problems referred to above, the utility model provides a kind of pressure generator, and this device can provide needed pressure continuously, has good airtight performance in experimentation, and cost is low, and is easy to use and safe and reliable.

Pressure generator provided by the utility model comprises container, air bag and measuring head, and wherein air bag is contained in the container and the opening of air bag and the opening of container are tightly connected; Measuring head is positioned at the outer and connector of measuring head of container and the opening of container is tightly connected; A plurality of paths that measuring head inside has main chamber and main chamber is communicated to the measuring head outside; And connector inside has the cavity that is communicated with main chamber, and air bag is communicated with this cavity.

The pressure generator that the utility model provides can be used for the various pressure applications that need, and in use can provide required pressure continuously, has good airtight performance in experimentation, and cost is low, and is easy to use and safe and reliable.

Description of drawings

Fig. 1 is the schematic diagram of the utility model pressure generator;

Fig. 2 is the schematic diagram that container and sealing are contained in the air bag in the container in the utility model pressure generator;

Fig. 3 is the profile of measuring head in the utility model pressure generator.

The specific embodiment

Below in conjunction with accompanying drawing preferred implementation of the present utility model is elaborated.

As shown in Figure 1 to Figure 3, pressure generator of the present utility model comprises container 11, air bag 12 and measuring head 2, and wherein air bag 12 is contained in the container 11 and the opening of air bag 12 and the opening of container 11 are tightly connected; The connector 21 that measuring head 2 is positioned at the outer and measuring head 2 of container 11 is tightly connected with the opening of container 11; A plurality of paths 23,24,25 that measuring head 2 inside have main chamber 22 and main chamber 22 are communicated to the measuring head outside; And connector 21 inside have the cavity 26 that is communicated with main chamber 22, and air bag 12 is communicated with this cavity 26.

Being tightly connected between container 11 and the measuring head 2 can realize by known mode, for example the connector 21 with measuring head 2 is screwed in the opening of container 11 by pad, perhaps container 11 and measuring head 2 are linked together by additional pipe joint, perhaps the connector of container 11 and the connector of measuring head 2 are fastened togather by the Spring Card structure, or the like.Those skilled in the art can select the only mode that is tightly connected for use according to concrete needs.

Container 11 can adopt containers such as vial, steel cylinder, its underpart can have hydraulic valve 14, in use by this hydraulic valve 14 to wherein charging into liquid, for example in container 11, charge into general hydraulic oil, as mineral oil, water-ethylene glycol, emulsion etc. by devices such as hydraulic pumps.Need to prove that this hydraulic valve 14 is not necessary, also can again this hydraulic valve 14 be installed on the container 11 in use.Air bag 12 sealings are contained in the container 11, and promptly gas in the air bag 12 and the liquid in the container 11 are separated from one another.The opening of the opening of air bag 12 and container 11 is tightly connected by retainer nut 13, can certainly adopt other known modes to connect together, for example uses the bayonet socket clamping.Being tightly connected between container 11 and the air bag 12 can be adopted known any desired manner, so do not remake more descriptions at this.

Measuring head 2 have connector 21, with the main chamber 22 of connector 21 internal communication and a plurality of paths 23,24,25 of main chamber 22 being communicated to the measuring head outside.Connector 21 inside are hollow, promptly have cavity 26, and this cavity 26 is connected with main chamber 22 equally.As required, a plurality of paths can comprise first path 23, alternate path 24 and the 3rd path 25, and wherein first path 23 is connected with test article 5, and alternate path 24 is connected with charge valve 4, and the 3rd path 25 is connected with Pressure gauge 3.Charge valve 4 also can be fixed on the alternate path 24 and link together with measuring head.The 3rd path 25 is connected with Pressure gauge 3, certainly, if do not need to calculate the pressure of test article 5, also can give birth to this Pressure gauge 3 of rate.In addition, measuring head 2 can also have other paths as required, for example is used to connect a plurality of positions of a plurality of test article or an object.

The course of work of this device is described at the test that utilizes pressure generator testing air conditioner pressure switch of the present utility model below.

Before this device work, first path 23 connects A/C pressure switch 5, alternate path 24 connects charge valve 4 (if connected charge valve 4, then charge valve 4 is connected nitrogen cylinder or source nitrogen), the 3rd path 25 connects Pressure gauge 3, container 11 is connected to hydraulic power source (not shown) by hydraulic valve 14, charge into nitrogen with nitrogen cylinder or other source nitrogens by charge valve 4, this nitrogen is via path 24 and connector 21 and enter into air bag 12, requirement charges into the pressure that nitrogen pressure in the air bag 12 is lower than test requirements document, and this moment, this nitrogen pressure can be found out by the reading of Pressure gauge 3.

Then, when this device is started working, open hydraulic valve 14, in container 11, inject liquid so that by this liquid compression air bag 12, therefore, the nitrogen in the air bag 12 is compressed, and air pressure raises, Deng rising to when equating, just can read the required air pressure of A/C pressure switch by Pressure gauge 3 with fluid pressure.

Therefore, when rising air pressure, do not need to continue to provide nitrogen, but by providing cheap and fluid pressure that provide is easily realized gases at high pressure, therefore the use amount that can save nitrogen greatly reduces cost.

Therefore, by foregoing description, the utility model provides a kind of pressure generator, this device can be used for the various pressure applications that need, and in use can provide required pressure continuously, has good airtight performance in experimentation, cost is low, and is easy to use and safe and reliable.

Claims

1, a kind of pressure generator is characterized in that, this device comprises container (11), air bag (12) and measuring head (2), wherein

Air bag (12) is contained in the container (11) and the opening of air bag (12) and the opening of container (11) are tightly connected;

Measuring head (2) is positioned at outside the container (11) and the opening of the connector (21) of measuring head (2) and container (11) is tightly connected;

A plurality of paths (23,24,25) that measuring head (2) inside has main chamber (22) and main chamber (22) is communicated to the measuring head outside; And

Connector (21) inside has the cavity (26) that is communicated with main chamber (22), and air bag (12) is communicated with this cavity (26).

2, pressure generator as claimed in claim 1 is characterized in that, described a plurality of paths comprise first path (23), alternate path (24) and the 3rd path (25).

3, pressure generator as claimed in claim 1 is characterized in that, the outer end of described alternate path (24) is connected with charge valve (4).

4, pressure generator as claimed in claim 1 is characterized in that, the bottom of described container (11) is connected with hydraulic valve (14).

5, pressure generator as claimed in claim 1 is characterized in that, the connector (21) of described measuring head (2) is screwed in the opening of described container (11).

6, pressure generator as claimed in claim 1 is characterized in that, links together by the retainer nut (13) who has sealing ring between described container (11) and the air bag (12).