CN216160105U

CN216160105U - Sealing ring sealing capacity verifying device

Info

Publication number: CN216160105U
Application number: CN202122222635.4U
Authority: CN
Inventors: 王嗣阳; 唐飞; 李星洲; 敬小梅; 刘海洋; 胡晓; 陶赟
Original assignee: Aerosun Corp
Current assignee: Aerosun Corp
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-04-01
Anticipated expiration: 2031-09-14

Abstract

The utility model relates to a sealing capability verification device for a sealing ring, and belongs to the technical field of air tightness tests. The device comprises a vacuum tank body and a push rod assembly which are respectively supported at two ends of a base; the vacuum tank body consists of an inner layer and an outer layer with one end open, the open of the outer layer is provided with an outer flange which is fixedly connected with the open of the outer layer in a sealing way, and the open of the inner layer is provided with an inner flange which is embedded with a test sealing ring; the inner hole of the outer flange plate is hermetically connected with one end of a sealing corrugated pipe, the other end of the sealing corrugated pipe is hermetically connected with a pressure applying ring, and the inner surface of the pressure applying ring is matched with the end surface of the inner flange embedded test sealing ring; the push rod assembly is provided with a telescopic push rod, one end of the push rod, which is adjacent to the vacuum tank body, is connected with the force application platform, and the force application platform is provided with an annular acting end acting on the inner flange through a pressure application ring. After the vacuum test device is adopted, after the vacuum interlayer space is vacuumized, the sealing performance verification data of the test sealing ring in the dynamic butt joint in the vacuum environment can be conveniently obtained by means of a corresponding test instrument.

Description

Sealing ring sealing capacity verifying device

Technical Field

The utility model relates to a sealing capability verification device for a sealing ring, in particular to a device for verifying the sealing capability of the sealing ring in a vacuum environment dynamic butt joint mode, and belongs to the technical field of air tightness tests.

Background

Sealing rings mounted on various mechanical devices are required to perform sealing functions under static or moving conditions at specified temperatures, pressures and in different liquids and gases. However, the sealing effect of the sealing ring is affected by various factors such as material, hardness, compression amount, size, shape, and shape of the sealing groove. For example, one of its typical operating conditions is: in a vacuum environment, a channel communicated with the atmosphere needs to be established, the channel is connected in a dynamic butt joint mode, and the joint is compressed through a sealing ring to realize sealing.

According to the knowledge of the applicant, no existing device for simply and effectively verifying the sealing capability of the sealing ring in the dynamic butt joint in the vacuum environment exists at present.

As can be seen from the search, the Chinese patent document with application number 00113598 discloses a method for the external pressure sealing test of the corrugated expansion joint, the clearance between the sealing corrugated pipe section and the sleeve of the corrugated expansion joint is used as a pressure medium cavity, the pressure of the pressure medium is radially and inwards acted on the sealing corrugated pipe section, or the gap formed between the sealing corrugated pipe section of the corrugated expansion joint and the second sealing corrugated pipe section positioned at the outer side of the sealing corrugated pipe section is used as a pressure medium cavity, the pressure of the pressure medium is applied to the sealing corrugated pipe section in a radial inward mode, however, the test object is the corrugated pipe, the essence is the verification of the sealing performance of the processed corrugated pipe under the condition of external pressurization, which is used for judging the specific part of the welding line leakage, the bellows hardly generates telescopic displacement in the test process, and the sealing ring is always compressed to a fixed compression amount through the flange for sealing. Further, chinese patent documents No. 201120029676.5 and No. 202010806607.4 disclose a mechanical seal test apparatus for a guide rail pump and a low-pressure seal test module integrated apparatus, respectively. These prior art solutions can not be used as a device for verifying the sealing ability of the sealing ring in the dynamic butt joint in the vacuum environment.

Disclosure of Invention

The utility model aims to: the sealing performance verification device for the sealing ring is provided, so that the problem of verification of the sealing performance of the sealing ring in dynamic butt joint in a vacuum environment is conveniently solved.

In order to achieve the purpose, the basic technical scheme of the seal ring sealing capability verification device is as follows: comprises a vacuum tank body and a push rod component which are respectively supported at two ends of a base;

the vacuum tank body is composed of an inner layer and an outer layer, wherein one end of the inner layer is provided with an opening, the opening of the outer layer is provided with an outer flange which is fixedly connected with the opening of the outer layer in a sealing way, and the opening of the inner layer is provided with an inner flange which is embedded with a test sealing ring; the inner hole of the outer flange plate is hermetically connected with one end of a sealing corrugated pipe, the other end of the sealing corrugated pipe is hermetically connected with a pressure applying ring, and the inner surface of the pressure applying ring is matched and matched with the end surface of the inner flange embedded test sealing ring;

the push rod assembly is provided with a telescopic push rod, one end of the push rod, which is adjacent to the vacuum tank body, is connected with the force application platform, and the force application platform is provided with an annular action end acting on the inner flange through a pressure application ring.

During testing, the inner layer of the vacuum tank body forms a sealing pair with the inner surface of a pressure applying ring connected with the sealing corrugated pipe through a testing sealing ring of the inner flange. When the push rod of the push rod assembly is pushed forwards, the force is uniformly applied through the force application platform, so that the surface of the pressure application ring is attached to the inner flange, the test sealing ring is elastically deformed, and the movable surface is sealed. In the process, the sealing corrugated pipe can be stretched and contracted by itself to compensate the displacement generated by applying pressure, so that a vacuumizing interlayer space is ensured to be formed between the inner layer and the outer layer of the vacuum tank body all the time, and a channel communicated with the atmosphere is constructed in the inner layer.

Therefore, after the vacuum interlayer space is vacuumized, the sealing performance verification data of the test sealing ring in the dynamic butt joint in the vacuum environment can be conveniently obtained by means of a corresponding test instrument.

The utility model further perfects that:

the outer diameter of the annular acting end is matched with the inner diameter of the sealing corrugated pipe, so that the sealing corrugated pipe can be internally supported and positioned at the same time.

The inner end of the pressure applying ring is provided with a concave inner surface. One end of the push rod, which is adjacent to the vacuum tank body, extends into the positioning convex ring in the middle of the force application platform and is connected with the positioning convex ring. Thus, the push rod and the pressure applying ring can be positioned stably and reliably.

The surface of the pressure applying ring is provided with a positioning ring groove matched with the annular acting end of the force applying platform, and the force applying platform applies pressure to the inner flange of the inner layer through the annular acting end embedded into the positioning ring groove of the pressure applying ring. Therefore, the pressing acting force on the sealing ring can be ensured to be uniform and stable.

The opening of the outer layer is provided with a flange ring, and an outer flange plate which is hermetically and fixedly connected with the opening is installed through a fastener. And the inner hole of the outer flange plate is connected with one end of the sealing corrugated pipe inserted into the inner hole in a welding and sealing manner. The other end of the sealing corrugated pipe is sleeved outside the pressure applying ring and is connected with the pressure applying ring in a sealing and welding mode. These structures avoid other potential leakage links.

The pressure applying ring is provided with a noise sensor through a bridge, and the base is provided with a vacuum pumping pipeline through an electric control valve and a pressure sensor.

Drawings

The present invention will be described in more detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic perspective exploded view of the embodiment of fig. 1.

Fig. 4 is a partially enlarged structural view of a bellows portion in the embodiment of fig. 1.

Detailed Description

Example one

As shown in fig. 1 to 4, the sealing-ring sealing-ability verification device of the present embodiment includes a base 4 having two ends supporting a vacuum tank 1 and a push rod assembly 3, respectively. The vacuum tank body 1 is composed of an inner layer 1-1 with one end open and an outer layer 1-2. The opening of the outer layer 1-2 is provided with a flange ring 1.1, and an outer flange plate 1.2 which is fixedly connected with the opening in a sealing way is arranged through a fastener. The inner layer 1-1 is provided with an inner flange 6 through the opening of the bottleneck, and the outer end face of the inner flange 6 is provided with a caulking groove for embedding a test sealing ring 7.

The inner hole of the outer flange plate 1.2 is connected with one end of the sealing corrugated pipe 2 inserted into the inner hole in a welding and sealing mode, and the other end of the sealing corrugated pipe 2 is sleeved outside the pressure applying ring 13 and connected with the pressure applying ring in a sealing and welding mode. The inner end of the pressure applying ring 13 is provided with a concave inner surface, and the inner surface is matched and matched with the end surface of the inner flange 6 embedded with the test sealing ring 7.

The push rod component 3 is mainly composed of an electric cylinder 3-1 and a push rod 3-2 at the telescopic end thereof, and a force sensor 9 and a displacement sensor 10 are arranged at corresponding positions. One end of the push rod 3-2 adjacent to the vacuum tank body 1 extends into a positioning convex ring 5.1 in the middle of the force application platform 5 and is connected with the positioning convex ring. The outer surface of the pressure applying ring 13 is provided with a positioning ring groove matched with the annular acting end of the force applying platform 5, and the force applying platform 5 stably applies pressure to the inner flange 6 of the inner layer through the annular acting end 5.2 embedded into the positioning ring groove of the pressure applying ring 13. The outer diameter of the annular active end 5.2 is adapted to the inner diameter of the sealing bellows 2.

In addition, the pressure applying ring 13 is provided with a noise sensor 8 through a bridge frame, and the base 4 is also provided with a vacuum pumping pipeline through an electric control valve 12 and a pressure sensor 11. In fig. 3, 14 is an O-ring seal between the can body and the flange ring and the flange plate.

During testing, the push rod component 3 fixed on one side of the base 4 extends out under the driving of the electric cylinder, pressing force is uniformly applied to the pressing surface at the inner end of the sealing corrugated pipe 2 through the force application platform 5, and the testing sealing ring 7 embedded on the flange 6 in the vacuum tank body 1 generates elastic deformation to form sealing on the movable surface. The test sealing ring 7 reaches a preset deformation amount under the detection of the displacement sensor 10, and simultaneously, the interlayer space of the vacuum tank body 1 starts to be vacuumized. When the preset vacuum degree is reached, pressure maintaining is carried out, and the leakage rate of the test sealing ring 7 under the vacuum degree is monitored in real time through the pressure sensor 11; monitoring the leakage noise value by the noise sensor 8; the pressure value borne by the sealing ring is monitored by the force sensor 9. In the process, the sealing corrugated pipe realizes displacement compensation in the telescopic motion on the premise of ensuring sealing, and the purpose of constructing a channel communicated with the atmosphere in the environment isolated by vacuum is achieved. And finally, carrying out quantitative analysis and evaluation on the sealing performance of the test sealing ring through multiple dimensions such as leakage rate, compression amount, pressure-bearing value, leakage noise value and the like. Generally, the lower the leakage rate and the lower the leakage noise value are, the better the sealing capability is, through a plurality of groups of dynamic tests, various parameters of the sealing ring are continuously determined, reliable test data can be provided for the type selection of the sealing ring in a specific use scene, and the compression quantity value and the pressure bearing value which are synchronously recorded provide important data reference for the structural design in engineering practice.

Experiments show that the embodiment has the following beneficial effects:

1. the requirement of verifying the sealing capacity of the sealing ring in a dynamic butt joint mode of a vacuum environment under various conditions can be met, and the dynamic butt joint device is simple in structure, high in efficiency, low in cost and more energy-saving.

2. The testing device can verify the sealing capacity of the sealing ring under specific pressure through the force sensor, so that the testing device is suitable for the condition that the pressure bearing value of a pressure bearing structure of the sealing ring is limited, namely the sealing selection under special conditions can be verified, for example, the connection device with strict limit on sealing pressing force is adopted.

3. The intelligent sensor facilities are convenient to be equipped to complete acquisition, transmission, storage, analysis, display and automatic control of various operating data in the test process through the Internet of things architecture, sensitive information characteristics can be extracted, quantitative and visual evaluation standards are provided for verification of sealing ring sealing capacity, and a more scientific evaluation system is formed along with continuous improvement of a data model.

4. The metal corrugated expansion joint is used as a sealing corrugated pipe, so that the sealing performance under a vacuum condition is good, the reliability is high, and the service life is long.

5. The vacuum-pumping volume of the interlayer space of the vacuum tank body is small, and the test efficiency is improved.

The above embodiments do not limit the scope of the present invention, and equivalent variations made according to the idea of the present invention still belong to the protection scope of the present invention. For example, the sealing bellows, the force application platform and the push rod assembly are all detachable; the arrangement of the base can be horizontal or vertical; the flange can be replaced by other shapes according to different experimental requirements.

Claims

1. A sealing ring sealing capability verification device comprises a vacuum tank body (1) and a push rod assembly (3) which are respectively supported at two ends of a base (4);

the vacuum tank body is composed of an inner layer and an outer layer with one end open, the open of the outer layer is provided with an outer flange plate which is fixedly connected with the open of the outer layer in a sealing way, and the open of the inner layer is provided with an inner flange which is embedded with a test sealing ring (7); the inner hole of the outer flange plate is hermetically connected with one end of a sealing corrugated pipe, the other end of the sealing corrugated pipe is hermetically connected with a pressure applying ring, and the inner surface of the pressure applying ring is matched and matched with the end surface of the inner flange embedded test sealing ring;

the push rod assembly is provided with a telescopic push rod, one end of the push rod, which is adjacent to the vacuum tank body, is connected with a force application platform (5), and the force application platform is provided with an annular acting end acting on the inner flange through a pressure application ring.

2. The seal ring sealing ability verification device according to claim 1, wherein: the outer diameter of the annular acting end is matched with the inner diameter of the sealing corrugated pipe.

3. The seal ring sealing ability verification device according to claim 1 or 2, wherein: the inner end of the pressure applying ring is provided with a concave inner surface.

4. A seal ring sealing ability verification device according to claim 3, wherein: one end of the push rod, which is adjacent to the vacuum tank body, extends into the positioning convex ring in the middle of the force application platform and is connected with the positioning convex ring.

5. The seal ring sealing ability verification device according to claim 4, wherein: the surface of the pressure applying ring is provided with a positioning ring groove matched with the annular acting end of the force applying platform, and the force applying platform applies pressure to the inner flange of the inner layer through the annular acting end embedded into the positioning ring groove of the pressure applying ring.

6. The seal ring sealing ability verification device according to claim 5, wherein: the opening of the outer layer is provided with a flange ring, and an outer flange plate which is hermetically and fixedly connected with the opening is installed through a fastener.

7. The seal ring sealing ability verification device according to claim 6, wherein: and the inner hole of the outer flange plate is connected with one end of the sealing corrugated pipe inserted into the inner hole in a welding and sealing manner.

8. The seal ring sealing ability verification device according to claim 7, wherein: the other end of the sealing corrugated pipe is sleeved outside the pressure applying ring and is connected with the pressure applying ring in a sealing and welding mode.

9. The seal ring sealing ability verification device according to claim 8, wherein: the pressure applying ring is provided with a noise sensor through a bridge, and the base is provided with a vacuum pumping pipeline through an electric control valve and a pressure sensor.