阅读说明：本技术 薄膜式液体介质隔离装置 (Thin film type liquid medium isolation device ) 是由 王洋 盛晓岩 胡存忠 于 2019-11-27 设计创作，主要内容包括：本发明公开的薄膜式液体介质隔离装置,属于压力校准技术领域。本发明包括压力输入口、O型密封圈A、缸体、隔离薄膜、溢油口A、O型密封圈B、截止阀、溢油口B、限流螺钉、O型密封圈C、上端盖、端盖螺栓、压力输出口、O型密封圈D、堵头。本发明采用柔性隔离膜物理隔离,能够隔离包括航空蓝油、红油、液压油、水在内的多种液体介质,在使用过程中能够完全避免不同液体介质间的相互污染,且隔离膜采用完全浸入式设计,能够有效保证测量的灵敏度。本发明测量精度高,使用压力范围大,操作简单,方便实验室或现场使用。本发明能够解决试验器液体压力参数校准中所使用的介质不一致的问题,且避免具有腐蚀性的液体介质造成标准器介质污染及腐蚀。(The invention discloses a thin film type liquid medium isolation device, and belongs to the technical field of pressure calibration. The invention comprises a pressure input port, an O-shaped sealing ring A, a cylinder body, an isolation film, an oil spilling port A, O-shaped sealing ring B, a stop valve, an oil spilling port B, a flow-limiting screw, an O-shaped sealing ring C, an upper end cover, an end cover bolt, a pressure output port, an O-shaped sealing ring D and a plug. The invention adopts the flexible isolation membrane for physical isolation, can isolate various liquid media including aviation blue oil, red oil, hydraulic oil and water, can completely avoid mutual pollution among different liquid media in the use process, and can effectively ensure the measurement sensitivity by adopting the completely immersed design of the isolation membrane. The invention has high measurement precision, large range of application pressure, simple operation and convenient laboratory or field use. The invention can solve the problem of inconsistent media used in the calibration of the liquid pressure parameters of the tester, and avoid the pollution and corrosion of the medium of the standard device caused by corrosive liquid media.)

1. Film formula liquid medium isolating device, its characterized in that: the oil-saving valve comprises a pressure input port (1), an O-shaped sealing ring A (2), a cylinder body (3), an isolating film (4), an oil spilling port A (5), an O-shaped sealing ring B (6), a stop valve (7), an oil spilling port B (8), a flow limiting screw (9), an O-shaped sealing ring C (10), an upper end cover (11), an end cover bolt (12), a pressure output port (13), an O-shaped sealing ring D (14) and a plug (15);

the pressure input port (1) is a port for inputting the pressure of the liquid medium to be detected;

the cylinder body (3) is hollow, the rear end of the cylinder body is of an open structure, and the center of the front end of the cylinder body is provided with an oil inlet; an oil overflow port A (5) is arranged on the cylinder body (3); the front end of the cylinder body (3) is fixedly connected with the pressure input port (1), and oil enters a cavity of the cylinder body (3) through the pressure input port (1) and the oil inlet;

the upper end cover (11) is of a T-shaped structure, and an oil passage is formed along the center line; a groove is formed in the center of the transverse position of the top end, and the oil duct A is communicated with the groove; a channel A is formed inwards along the side wall of the transverse position of the top end, and the channel A is communicated with the oil duct A; a channel B is formed inwards along the transverse position of the top end, the communication between the channel B and the channel A needs to be ensured, and the outlet of the channel B is an oil overflow port B8;

the stop valve (7) is of a boss structure with a tip end;

the flow limiting screw (9), the end cover bolt (12) and the pressure output port (13) are fixedly connected in sequence and then integrally fixed at the groove position of the upper end cover (11); the central line positions of the flow limiting screw (9), the end cover bolt (12) and the pressure output port (13) are all provided with oil passages B communicated with each other;

the plug (15) is used for protecting and preventing the measured liquid medium from flowing out, and preventing impurities from entering and polluting the medium;

the O-shaped sealing ring A (2) is used for sealing the pressure input port and the thread of the cylinder body to prevent liquid leakage;

the cylinder body (3) has the main function of storing a liquid pressure medium at a measured end;

the isolation film (4) is used for isolating different liquid pressure media such as aviation blue oil, red oil, hydraulic oil, water and the like;

the oil spilling port A (5) is a standard liquid medium spilling port and is used for ensuring that the medium cylinder body is filled with liquid;

the O-shaped sealing ring B (6) is used for sealing the upper end cover and the threads of the cylinder body to prevent liquid leakage;

the stop valve (7) is a tested liquid medium overflow control switch and is used for ensuring that liquid is filled in the isolation film;

the oil overflow port B (8) is a tested liquid medium overflow port and is used for ensuring that the tested liquid medium is filled in the isolation film;

the flow limiting screw (9) is used for controlling the flow of the liquid medium flowing into the isolating film and preventing the isolating film from being damaged by too fast pressure rise or pressure drop;

the O-shaped sealing ring C (10) is used for sealing the threaded connection part of the plug and the pressure output port;

the upper end cover (11) is an upper end cover of the cylinder body and is used for conveniently injecting a liquid medium and sealing the cylinder body;

the end cover bolt (12) is provided with an adaptive structure for conveniently embedding the flow limiting screw (9) and plays a role in limiting flow together with the flow limiting screw (9); the end cover bolt (12) is connected with a pressure output port;

the pressure output port (13) is used for connecting a standard device for calibration and is a port for outputting standard liquid medium pressure;

the O-shaped sealing ring D (14) is used for sealing the threaded connection part of the end cover bolt and the upper end cover;

the plug (15) is used for protecting and preventing the measured liquid medium from flowing out, and preventing impurities from entering and polluting the medium;

the pressure input port (1) is connected with the cylinder body (3) through threads and is sealed through an O-shaped sealing ring A (2); the upper end cover (11) is connected with the cylinder body (3) through threads and sealed through an O-shaped sealing ring B (6); a current-limiting screw (9) is embedded in the hole of the end cover bolt (12), and an O-shaped sealing ring C (10) plays a sealing role through threaded connection; the pressure output port (13) is connected to the end cover bolt (12) through threads; the plug (15) is connected with the pressure output port (13) through threads, and the O-shaped sealing ring D (14) plays a sealing role.

2. The thin film liquid medium spacer of claim 1, wherein: the working method is that a pressure input port (1) is provided with a pore, the same liquid medium of the calibration device flows into the cylinder body (3) from the input port, and the O-shaped sealing ring A (2) plays a role in sealing the cylinder body (3); when in use, the cylinder body (3) is screwed into the pressure equipment interface clockwise, and the oil overflow port A (5) is unscrewed by using a spanner; pouring the same liquid pressure medium used by the pressure equipment into the cylinder body (3) to 1/2 with the depth about the total depth of the inner hole of the cylinder body (3) so as to ensure that the stop valve (7) is in a closed state and the plug (15) of the pressure output port (13) is plugged, screwing the upper end cover (11) filled with the liquid medium into the cylinder body (3), and screwing and fastening; after the upper end cover (11) is screwed, the oil overflow port A (5) is screwed; liquid overflows from the oil spilling port A (5) in the screwing-in process, and the inside of the cylinder body (3) is ensured to be filled with the liquid through the oil spilling port A (5), and the redundant liquid can be discharged from the oil spilling port A (5);

the isolation film (4) is made of a certain high polymer material, can prevent the isolation film from being corroded by corrosive liquid such as blue oil, red oil and the like, can effectively transfer pressure, is used for containing liquid media the same as the calibrated device, and when the isolation film is used, the stop valve (7) is opened, and the isolated liquid is poured into the upper end cover (11) and the rubber isolation film (4) from the pressure output port (13); when liquid overflows from a small hole at the top (11) of the end cover, namely the oil overflow port B (8), the stop valve (7) is closed, and the pressure output port (13) is well blocked; observing whether the interior of the isolating film (4) is filled with liquid or not through the oil overflow port B (8); the stop valve (7) is used for opening and closing the oil overflow port B (8); the flow limiting screw (9) is used for limiting the pressure transmission speed of the calibration standard end, reducing the liquid flowing speed, slowly increasing and decreasing the pressure and improving the pressure control stability; and taking down the plug of the pressure output port, screwing the pressure equipment to be tested into the pressure output port, and calibrating the liquid pressure parameters.

3. The thin film liquid medium spacer of claim 1 or 2, wherein: the operation method is that,

the method comprises the following steps: rotating the upper end cover (11) anticlockwise to separate the upper end cover from the cylinder body (3);

step two: opening the stop valve (7), and pouring the isolated liquid into the upper end cover (11) and the rubber isolation film (4) from the pressure output port; when liquid is poured in, the isolating membrane (4) is tapped, so that the liquid can flow in conveniently; observing whether liquid overflows from a small hole at the top of the upper end cover (11), namely the oil overflow port B, closing the stop valve (7) when the liquid overflows, and blocking a pressure output port (13);

step three: screwing the cylinder body (3) into the pressure equipment interface clockwise, and loosening the oil overflow port A (5) by using a spanner; pouring the same liquid pressure medium as used by the pressure device into the interior of the cylinder (3) to a depth of about 1/2 of the total depth of the interior of the cylinder (3);

step four: screwing the upper end cover (11) filled with the liquid medium into the cylinder body (3), and screwing and fastening; in the rotating and mixing process, the stop valve (7) is ensured to be in a closed state, and a plug (15) of the pressure output port (13) is ensured to be well plugged, liquid overflows from the oil overflow port A (5) in the rotating and mixing process, the overflowed liquid is properly collected, and the phenomenon that the equipment is polluted due to the fact that the liquid flows randomly is avoided; after the upper end cover (11) is screwed, the oil overflow port A (5) is screwed;

step five: and (3) taking down the plug (15) of the pressure output port (13), screwing the pressure equipment to be tested into the pressure output port (13), and calibrating the liquid pressure parameters.

4. The thin film liquid medium spacer of claim 3, wherein: the multiple liquid media comprise aviation blue oil, red oil, hydraulic oil and water.

Technical Field

The invention relates to a liquid medium isolation device in field calibration of liquid pressure parameters, in particular to a film type liquid medium isolation device, and belongs to the technical field of pressure calibration.

Background

The metering and testing technology of pressure magnitude is one of the basic metering technologies in the field of mechanical metering. The measurement and test of the liquid pressure as an important part of the pressure test are widely applied to the fields of aviation, aerospace, ships, oil exploration and the like, in order to ensure the safety of scientific research and production work in the fields, the pressure instruments need to be checked and calibrated regularly, and the accuracy of the pressure value directly influences the smooth completion of the scientific research and production of the weapon equipment.

The oil medium pressure controller is a product of combining a sensor technology, a computer technology and a fluid control technology, quickly, accurately and stably generates target pressure through controlling oil, and simultaneously can realize continuous and accurate control of oil pressure through real-time feedback and display of measured pressure of the pressure sensor.

Because aviation product ground testers are various in types, different liquid media used by different testers are different and comprise aviation kerosene, YH-15 hydraulic oil (red oil), blue oil and the like, a common calibration laboratory cannot be equipped with a special pressure standard device for a test medium, and although a certain isolation measure is adopted in the calibration process, the penetration of the calibrated medium is still difficult to completely avoid, so that the sealing performance and the service life of the standard device are influenced.

The media used on the tester are various, such as: the standard liquid calibration device generally adopts non-corrosive sebacate or other non-corrosive liquid media which are inconsistent with media used by an aviation ground product tester and cannot be directly connected with the calibration device to carry out calibration on site. Therefore, aiming at the medium used by the tester in field calibration, a liquid medium isolation device needs to be designed to be connected between the calibration device and the tester, and the material and the sealing element used by the device not only can effectively isolate two different media and resist corrosion, but also can effectively transmit the pressure value. When the liquid medium calibration system is designed, the device which can ensure good isolation of the medium and can transmit pressure without loss can be provided. Aiming at the problems, a film type liquid medium isolation device is provided, and conditions and guarantee are provided for field calibration of pressure parameters of various different media.

Disclosure of Invention

Aiming at the problem of inconsistent media used in the calibration of the liquid pressure parameters of an aviation ground product tester, in particular to the problems of medium pollution and corrosivity of a standard device caused by corrosive liquid media, the invention discloses a thin film type liquid medium isolation device which aims to solve the technical problems that: the problem of inconsistent media used in the calibration of the liquid pressure parameters of the aviation ground product tester can be solved, and the pollution and corrosion of the medium of the standard device caused by corrosive liquid media can be avoided.

The invention relates to a pressure device capable of isolating different liquid pressure media when used for pressure calibration, which can isolate various liquid media including aviation blue oil, red oil, hydraulic oil and water by adopting a flexible isolation membrane and a physical isolation principle.

The purpose of the invention is realized by the following technical scheme.

The invention discloses a film type liquid medium isolation device which comprises a pressure input port, an O-shaped sealing ring A, a cylinder body, an isolation film, an oil overflow port A, O-shaped sealing ring B, a stop valve, an oil overflow port B, a flow-limiting screw, an O-shaped sealing ring C, an upper end cover, an end cover bolt, a pressure output port, an O-shaped sealing ring D and a plug.

The pressure input port is a port for inputting the pressure of the liquid medium to be detected;

the cylinder body is hollow, the rear end of the cylinder body is of an open structure, and an oil inlet is formed in the center of the front end of the cylinder body; an oil overflow port A is formed on the cylinder body; the front end of the cylinder body is fixedly connected with the pressure input port, and oil enters the cavity of the cylinder body through the pressure input port and the oil inlet;

the upper end cover is of a T-shaped structure, and an oil passage A is formed along the central line; a groove is formed in the center of the transverse position of the top end, and the oil duct A is communicated with the groove; a channel A is formed inwards along the side wall of the transverse position of the top end, and the channel A is communicated with the oil duct A; a channel B is formed inwards along the transverse position of the top end, the communication between the channel B and the channel A needs to be ensured, and the outlet of the channel B is an oil overflow port B;

the stop valve is of a boss structure with a tip end;

the flow limiting screw, the end cover bolt and the pressure output port are fixedly connected in sequence and then integrally fixed at the groove position of the upper end cover; the flow limiting screw, the end cover bolt and the pressure output port central line are all provided with an oil duct B communicated with each other;

the plug is used for protecting and preventing the measured liquid medium from flowing out, and impurities are prevented from entering and polluting the medium;

the O-shaped sealing ring A is used for sealing the pressure input port and the thread of the cylinder body to prevent liquid leakage;

the cylinder body has the main functions of storing a liquid pressure medium at a detected end;

the isolation film is used for isolating different liquid pressure media such as aviation blue oil, red oil, hydraulic oil, water and the like;

the oil overflow port A is a standard liquid medium overflow port and is used for ensuring that the liquid medium is filled in the cylinder body;

the O-shaped sealing ring B is used for sealing the upper end cover and the threads of the cylinder body to prevent liquid leakage;

the stop valve is a tested liquid medium overflow control switch and is used for ensuring that liquid is filled in the isolation film;

the oil overflow port B is a tested liquid medium overflow port and is used for ensuring that the tested liquid medium is filled in the isolation film;

the flow limiting screw is used for controlling the flow of the liquid medium flowing into the isolating film and preventing the isolating film from being damaged by too fast pressure rise or pressure drop;

the O-shaped sealing ring C is used for sealing the threaded connection part of the plug and the pressure output port;

the upper end cover is an upper end cover of the cylinder body and is used for conveniently injecting a liquid medium and sealing the cylinder body;

the end cover bolt is an adaptive structure for conveniently embedding the flow limiting screw, and plays a role in limiting flow together with the flow limiting screw; the end cover is connected with the pressure output port through a bolt;

the pressure output port is used for connecting a standard device for calibration and is a port for outputting standard liquid medium pressure;

the O-shaped sealing ring D is used for sealing the threaded connection part of the end cover bolt and the upper end cover;

the plug is used for protecting and preventing the measured liquid medium from flowing out, and impurities are prevented from entering and polluting the medium;

the pressure input port is connected with the cylinder body through threads and is sealed through an O-shaped sealing ring A; the upper end cover is connected with the cylinder body through threads and sealed through an O-shaped sealing ring B; a current-limiting screw is embedded in the bolt hole of the end cover and is connected through threads, and the O-shaped sealing ring C plays a sealing role; the pressure output port is connected to the end cover bolt through threads; the plug is in threaded connection with the pressure output port, and the O-shaped sealing ring D plays a role in sealing.

The working method of the film type liquid medium isolating device disclosed by the invention is that a pressure input port is provided with a pore, the same liquid medium of the calibrating device flows into the cylinder body from the input port, and the O-shaped sealing ring A plays a role in sealing the cylinder body. When the hydraulic pressure relief device is used, the cylinder body needs to be screwed into the pressure equipment interface clockwise, and the oil overflow port A is unscrewed by using a spanner. The same liquid pressure medium used by the pressure equipment is poured into the cylinder body, the pouring depth is about 1/2 of the total depth of the inner hole of the cylinder body, the stop valve is ensured to be in a closed state, the plug of the pressure output port is ensured to be blocked, and the upper end cover filled with the liquid medium is screwed into the cylinder body and screwed and fastened. And after the upper end cover is screwed, the oil overflow port A is screwed. Liquid overflows from the oil overflow port A in the screwing-in process, the inside of the cylinder body is full of the liquid through the oil overflow port A, and the redundant liquid can be discharged from the oil overflow port A.

Isolation film adopts certain macromolecular material, prevents to be corroded by corrosive liquids such as blue oil, red oil to can effectual transmission pressure, be used for holding by the same liquid medium of school device, open the stop valve during the use, will be kept apart liquid and pour into inside upper end cover and the rubber isolation film by the pressure delivery outlet. When the small hole at the top of the end cover, namely the oil overflow port B, has liquid overflow, the stop valve is closed, and the pressure output port is well blocked. And observing whether the inside of the isolation film is filled with liquid or not through the oil overflow port B. The stop valve is used for opening and closing the oil overflow port B. The current-limiting screw is used for limiting the pressure transmission speed of the calibration standard end, reducing the liquid flowing speed, slowly increasing and decreasing the pressure and improving the pressure control stability. And taking down the plug of the pressure output port, screwing the pressure equipment to be tested into the pressure output port, and calibrating the liquid pressure parameters.

The operation method of the film type liquid medium isolating device disclosed by the invention comprises the following steps:

the method comprises the following steps: rotating the upper end cover anticlockwise to separate the upper end cover from the cylinder body;

step two: and opening the stop valve, and pouring the isolated liquid into the upper end cover and the rubber isolation film from the pressure output port. When liquid is poured in, the isolating film is tapped to facilitate the liquid to flow in. Observing whether liquid overflows from a small hole on the top of the upper end cover, namely the oil overflow port B, closing the stop valve when the liquid overflows, and blocking a pressure output port;

step three: and screwing the cylinder body into the pressure equipment interface clockwise, and unscrewing the oil overflow port A by using a spanner. Pouring the same liquid pressure medium as used by the pressure device into the interior of the cylinder at 1/2 a depth of about the total depth of the interior of the cylinder;

step four: and screwing the upper end cover filled with the liquid medium into the cylinder body, and screwing and fastening. In the rotating and mixing process, the stop valve is ensured to be in a closed state, the plug of the pressure output port is ensured to be blocked, liquid overflows from the oil overflow port A in the rotating and mixing process, the overflowed liquid is properly collected, and the phenomenon that the equipment is polluted due to the fact that the liquid flows randomly is avoided. And after the upper end cover is screwed, the oil overflow port A is screwed.

Step five: and taking down the plug of the pressure output port, screwing the pressure equipment to be tested into the pressure output port, and calibrating the liquid pressure parameters.

Has the advantages that:

1. according to the film type liquid medium isolation device, the test equipment for isolating different liquid pressure media adopts the principle of physical isolation of the flexible isolation film, can isolate various liquid media including aviation blue oil, red oil, hydraulic oil and water, can completely avoid mutual pollution among different liquid media in the use process, and can effectively ensure the measurement sensitivity by adopting the completely immersed design of the isolation film.

2. The film type liquid medium isolation device has the advantages of high measurement precision, good pressure sensitivity, large using pressure range and simple operation, is convenient for laboratory or field use, can be applied to liquid pressure calibration in a laboratory and a field, particularly real-time online calibration of a large-scale system, and provides effective technical means and methods for medium isolation problems in field, online calibration and even in-situ calibration.

Drawings

FIG. 1 is a schematic cross-sectional view of a thin film type liquid medium separator;

FIG. 2 is a structural design diagram of the thin film type liquid medium isolator;

fig. 3 is a design diagram of the internal structure of the thin film type liquid medium isolator.

The device comprises a pressure input port 1, a pressure output port 2, an O-shaped sealing ring A, a cylinder body 3, an isolation film 4, an oil overflow port 5, an oil overflow port B6, an O-shaped sealing ring B7, a stop valve 8, an oil overflow port B9, a flow-limiting screw, an O-shaped sealing ring C10, an upper end cover 11, an end cover bolt 12, a pressure output port 13, an O-shaped sealing ring D14 and a plug 15.

Detailed Description

The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings and examples.

As shown in fig. 1, 2, and 3, the film-type liquid medium isolating device disclosed in this embodiment includes a pressure input port 1, an O-ring a2, a cylinder 3, an isolating film 4, an oil overflow port a5, an O-ring B6, a stop valve 7, an oil overflow port B8, a flow-limiting screw 9, an O-ring C10, an upper end cap 11, an end cap bolt 12, a pressure output port 13, an O-ring D14, and a plug 15.

The pressure input port 1 is a port for inputting the pressure of the liquid medium to be detected;

the cylinder body 3 is hollow, the rear end of the cylinder body is of an open structure, and an oil inlet is formed in the center of the front end of the cylinder body; an oil overflow port A5 is arranged on the cylinder body 3; the front end of the cylinder body 3 is fixedly connected with the pressure input port 1, and oil enters a cavity of the cylinder body 3 through the pressure input port 1 and the oil inlet;

the upper end cover 11 is of a T-shaped structure, and an oil passage is formed along the center line; a groove is formed in the center of the transverse position of the top end, and the oil duct A is communicated with the groove; a channel A is formed inwards along the side wall of the transverse position of the top end, and the channel A is communicated with the oil duct A; a channel B is formed inwards along the transverse position of the top end, the communication between the channel B and the channel A needs to be ensured, and the outlet of the channel B is an oil overflow port B8;

the stop valve 7 is of a boss structure with a tip end;

the flow limiting screw 9, the end cover bolt 12 and the pressure output port 13 are fixedly connected in sequence and then integrally fixed at the groove position of the upper end cover 11; the central line positions of the flow limiting screw 9, the end cover bolt 12 and the pressure output port 13 are all provided with an oil duct B communicated with each other;

the plug 15 is used for protecting and preventing the measured liquid medium from flowing out, and preventing impurities from entering and polluting the medium;

the O-shaped sealing ring A2 is used for sealing the pressure input port and the cylinder body thread to prevent liquid leakage;

the cylinder 3 has the main functions of storing a liquid pressure medium at a measured end;

the isolation film 4 is used for isolating different liquid pressure media such as aviation blue oil, red oil, hydraulic oil, water and the like;

the oil spilling port A5 is a standard liquid medium spilling port and is used for ensuring that liquid fills the medium cylinder;

the O-shaped sealing ring B6 is used for sealing the upper end cover and the thread of the cylinder body to prevent liquid leakage;

the stop valve 7 is a tested liquid medium overflow control switch and is used for ensuring that liquid is filled in the isolation film;

the oil overflow port B8 is a tested liquid medium overflow port and is used for ensuring that the tested liquid medium is filled in the isolation film;

the flow limiting screw 9 is used for controlling the flow of the liquid medium flowing into the isolating film and preventing the isolating film from being damaged by too fast pressure rise or pressure drop;

the O-shaped sealing ring C10 is used for sealing the threaded connection part of the plug and the pressure output port;

the upper end cover 11 is an upper end cover of the cylinder body and is used for conveniently injecting a liquid medium and sealing the cylinder body;

the end cover bolt 12 is an adaptive structure for conveniently embedding the flow limiting screw 9 and plays a role of flow limiting together with the flow limiting screw 9; the end cover bolt 12 is connected with a pressure output port;

the pressure output port 13 is used for connecting a standard device for calibration and is a port for outputting standard liquid medium pressure;

the O-shaped sealing ring D14 is used for sealing the threaded connection part of the end cover bolt and the upper end cover;

the plug 15 is used for protecting and preventing the measured liquid medium from flowing out, and preventing impurities from entering and polluting the medium;

the pressure input port 1 is connected with the cylinder body 3 through threads and is sealed through an O-shaped sealing ring A2; the upper end cover 11 is connected with the cylinder body 3 through threads and sealed through an O-shaped sealing ring B6; the inside of the hole of the end cover bolt 12 is embedded with a current-limiting screw 9, and an O-shaped sealing ring C10 plays a sealing role through threaded connection; the pressure output port 13 is connected to the end cover bolt 12 through threads; the plug 15 is connected with the pressure output port 13 through threads, and the O-shaped sealing ring D14 plays a sealing role.

The working method of the thin film type liquid medium isolation device disclosed in this embodiment is that a fine hole is formed on the pressure input port 1, the same liquid medium as the calibration device flows into the cylinder 3 from the input port, and the O-ring a2 plays a role in sealing the cylinder 3. When in use, the cylinder body 3 needs to be screwed into the pressure equipment interface clockwise, and the oil overflow port A5 is unscrewed by using a wrench. The same liquid pressure medium used by the pressure equipment is poured into the cylinder 3 to the depth of 1/2 which is about the total depth of the inner hole of the cylinder 3, the stop valve 7 is ensured to be in a closed state, the plug 15 of the pressure output port 13 is ensured to be blocked, and the upper end cover 11 filled with the liquid medium is screwed into the cylinder 3 and screwed and fastened. After the upper end cap 11 is screwed, the oil overflow port a5 is screwed again. During screwing, liquid overflows from the oil spilling port A5, and the oil spilling port A5 ensures that the interior of the cylinder 3 is full of liquid and the redundant liquid can be discharged from the oil spilling port A5.

Isolating diaphragm 4 adopts certain macromolecular material, prevents to be corroded by corrosive liquids such as blue oil, red oil to can effectual transmission pressure, be used for holding by the same liquid medium of school device, open stop valve 7 during the use, will be isolated liquid and pour into inside upper end cover 11 and rubber isolating diaphragm 4 by pressure output port 13. When the small hole at the top 11 of the end cover, namely the oil overflow port B8, overflows with liquid, the stop valve 7 is closed, and the pressure output port 13 is blocked. Whether the inside of the separation film 4 is filled with the liquid is observed through the oil overflow port B8. The shutoff valve 7 is used to open and close the oil spill port B8. The flow-limiting screw 9 is used for limiting the pressure transmission speed of the calibration standard end, reducing the liquid flowing speed, slowly increasing and decreasing the pressure and improving the pressure control stability. And taking down the plug of the pressure output port, screwing the pressure equipment to be tested into the pressure output port, and calibrating the liquid pressure parameters.

The operation method of the thin film type liquid medium isolation device disclosed by the embodiment comprises the following steps:

the method comprises the following steps: rotating the upper end cover 11 anticlockwise to separate the upper end cover from the cylinder 3;

step two: the stop valve 7 is opened, and the isolated liquid is poured into the upper end cover 11 and the rubber isolation film 4 from the pressure output port. When liquid is poured in, the isolating film 4 is tapped to facilitate the liquid to flow in. Observing whether liquid overflows from a small hole at the top of the upper end cover 11, namely an oil overflow port B8, closing the stop valve 7 when the liquid overflows, and blocking the pressure output port 13;

step three: the cylinder 3 is screwed into the pressure equipment port clockwise and the oil overflow port a5 is unscrewed with a wrench. Pouring the same liquid pressure medium as used by the pressure device into the interior of the cylinder 3 to a depth of about 1/2 of the total depth of the interior of the cylinder 3;

step four: the upper end cap 11 filled with the liquid medium is screwed into the cylinder 3 and fastened. In the rotating and mixing process, the stop valve 7 is ensured to be in a closed state, the plug 15 of the pressure output port 13 is ensured to be blocked, liquid overflows from the oil overflow port A5 in the rotating and mixing process, the overflowed liquid is properly collected, and the phenomenon that the liquid randomly flows to cause equipment pollution is avoided. After the upper end cap 11 is screwed, the oil overflow port a5 is screwed again.

Step five: and (4) taking down the plug 15 of the pressure output port 13, screwing the pressure equipment to be tested into the pressure output port 13, and calibrating the liquid pressure parameters.

The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.