CN108287069B

CN108287069B - Connecting device and connecting method for fixing backrest tube and test port

Info

Publication number: CN108287069B
Application number: CN201810224116.1A
Authority: CN
Inventors: 王帅; 路昆; 张庆国; 王学同
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2018-03-19
Filing date: 2018-03-19
Publication date: 2023-06-20
Anticipated expiration: 2038-03-19
Also published as: CN108287069A

Abstract

The invention relates to a connecting device and a connecting method for fixing a backrest tube and a test port. At present, rust and dust appear on test ports of most power plants due to long time, so that the backrest tube is not firmly fixed, the test ports are not tightly sealed, and the like. The invention comprises a test port, a fixing device and an air duct shell, wherein the test port is arranged on the air duct shell, and the fixing device is fixed with the test port; the fixing device is provided with a sealing lining, a sealing shell, a measuring hole and a telescopic scale; the sealing lining is positioned in the sealing shell, the sealing lining comprises an inner ring lining and an outer ring lining, and the sealing shell comprises a shell inner ring and a shell outer ring; the test port is positioned between the inner ring lining and the outer ring lining, the inner ring lining is contacted with the inner ring of the shell, and the outer ring lining is contacted with the outer ring of the shell; the measuring hole is arranged in the center of the fixing device, and the telescopic scale is arranged on the measuring hole. The invention can realize better engagement and sealing of the backrest pipe and the test port with serious rust or dust accumulation, and improve the test precision.

Description

Connecting device and connecting method for fixing backrest tube and test port

Technical Field

The invention relates to a connecting device and a connecting method for fixing a backrest pipe and a test port, which are applied to fixing the backrest pipe and the test port in the air volume calibration and primary air leveling processes.

Background

There are two conventional tests in the current utility boiler test: and (5) calibrating cold air quantity and leveling cold primary air. The S-shaped backrest pipe has the advantages of difficult blockage, convenient measurement and the like, and is widely applied to cold air volume calibration and cold primary air leveling tests. Through many field tests, the problems that the test ports of most power plants are rusted due to long time, and the surface dust is more due to long test operation, so that plugs for sealing and fixing the backrest pipe are difficult to be well meshed with the test ports with serious rusting and dust accumulation in the test process, the backrest pipe is not firmly fixed, the test ports are not tightly sealed and the like are solved, the test precision and the test process are seriously affected, and great inconvenience is brought to test staff, such as Chinese patent application number 201520308235.7.

How to firmly fix and well seal the S-shaped backrest tube and a test port with serious rust and dust deposit has attracted much attention and thinking.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the connecting device and the connecting method for fixing the backrest pipe and the test port, which are reasonable in structural design, and the connecting device and the connecting method adopt the labyrinth sealing principle to realize firm fixation and good sealing of the S-shaped backrest pipe and the test port with serious rust and dust accumulation, improve the test precision, accelerate the test process and bring convenience to field test personnel.

The invention solves the problems by adopting the following technical scheme: the connecting device for fixing the backrest pipe and the test port comprises the test port, a fixing device and an air duct shell, wherein the test port is arranged on the air duct shell, and the fixing device is fixed with the test port; the fixing device is of a cylindrical structure and is provided with a sealing lining, a sealing shell, a measuring hole and a telescopic scale; the sealing lining is positioned in the sealing shell, the sealing lining comprises an inner ring lining and an outer ring lining, and the sealing shell comprises a shell inner ring and a shell outer ring; the test port is positioned between the inner ring lining and the outer ring lining, the inner ring lining is contacted with the inner ring of the shell, and the outer ring lining is contacted with the outer ring of the shell; the measuring hole is arranged in the center of the fixing device, and the telescopic scale is arranged on the measuring hole. The structure design is reasonable, the backrest tube can be well meshed and sealed with a test port with serious rust or dust accumulation, and the test precision is improved.

Furthermore, the telescopic scale is a telescopic structure formed by a plurality of hollow cylindrical pipes, the hollow pipes are made of organic glass, and scales are arranged on the surfaces of the hollow pipes. The telescopic structure of telescopic scale can be nimble to the back pipe go deep into the intraductal degree of depth and mark, and telescopic structure can reduce the volume of equipment, portable.

Further, the measuring hole is used for fixing the backrest tube, and the measuring hole is of a rectangular structure. The shape of the measuring hole of the rectangular structure is matched with that of the section of the backrest tube, so that the direction of the backrest tube can be better fixed.

Furthermore, the sealing lining is made of high-temperature compressed sponge. The sealing lining has the characteristics of high temperature resistance, corrosion resistance, abrasion resistance, difficult deformation and the like, can be used for a long time, and ensures the reliability of the test.

Furthermore, the sealing lining is matched with the experimental port to form a labyrinth sealing structure. The screw thread of test mouth stretches into in the sealed inside lining and forms labyrinth seal structure, and sealed effect is good.

A method for connecting a backrest tube to a test port-fixing connection device as described above, characterized in that the method comprises the following steps: the backrest pipe penetrates into the telescopic scale and penetrates through the measuring hole, the length of the backrest pipe entering the measuring hole is selected by utilizing the telescopic scale according to actual needs, and the test port is inserted into the sealing lining until the threads of the test port completely enter the sealing lining, so that a test can be performed. The operation is simple, and the test precision is high.

Compared with the prior art, the invention has the following advantages and effects:

1) By adopting the labyrinth sealing principle, not only can the test mouth be well sealed, but also the backrest tube can be firmly fixed, the test precision is improved, and the test process is accelerated.

2) The sealing lining adopts high-temperature compression sponge, has the characteristics of high temperature resistance, corrosion resistance, abrasion resistance, difficult deformation and the like, prolongs the service life of the connecting device, and improves the accuracy of the test.

3) The telescopic ruler can flexibly calibrate the depth of the backrest tube penetrating into the tube, the problems that the ring ruler is easy to deform and the wood ruler is heavy are effectively solved, and the telescopic structure can reduce the volume of the device and is convenient to carry.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the A-A plane in FIG. 1.

In the figure: test port 1, fixing device 2, wind channel shell 3, telescopic scale 4, sealed inside lining 21, inner circle inside lining 21A, outer lane inside lining 21B, sealed shell 22, shell inner circle 22A, shell outer lane 22B, survey hole 23.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.

Examples

Referring to fig. 1 to 2, a connecting device for fixing a backrest tube and a test port comprises a test port 1, a fixing device 2 and an air duct housing 3, wherein the test port 1 is arranged on the air duct housing 3, and the fixing device 2 is fixed with the test port 1.

The fixing device 2 is of a cylindrical structure, and the fixing device 2 is provided with a sealing lining 21, a sealing shell 22, a measuring hole 23 and a telescopic scale 4; the sealing liner 21 is made of high-temperature compressed sponge, and has the characteristics of high temperature resistance, corrosion resistance, abrasion resistance, difficult deformation and the like; the seal liner 21 is located within the seal housing 22, the seal liner 21 including an inner ring liner 21A and an outer ring liner 21B, the seal housing 22 including a housing inner ring 22A and a housing outer ring 22B; the test port 1 is positioned between the inner ring lining 21A and the outer ring lining 21B, the seal lining 21 is in interference fit with the test port 1 to form a labyrinth seal structure, the seal effect is good, and the test precision is high; the inner liner 21A contacts the outer shell inner ring 22A, and the outer liner 21B contacts the outer shell outer ring 22B.

The measuring hole 23 is arranged in the center of the fixing device 2, the measuring hole 23 is used for fixing the backrest tube, the measuring hole 23 is of a rectangular structure and is matched with the section shape of the backrest tube, and the function of fixing the direction of the backrest tube is achieved.

The telescopic scale 4 is arranged on the measuring hole 23, the telescopic scale 4 is of a telescopic structure formed by a plurality of hollow tubes in a cylindrical shape, and the hollow tubes are communicated with the measuring hole 23; the hollow tube is made of organic glass, and the surface of the hollow tube is provided with scales for measuring the length of the backrest tube penetrating into the measuring hole 23.

The connecting method of the connecting device for fixing the backrest tube and the test port comprises the following steps of: the backrest pipe penetrates into the telescopic scale 4 and penetrates through the measuring hole 23, the length of the backrest pipe entering the measuring hole 23 is selected by utilizing the telescopic scale 4 according to actual needs, and the test port 1 is inserted into the sealing liner 21 until the threads of the test port completely enter the sealing liner 21, so that a test can be performed.

Although the present invention is described with reference to the above embodiments, it should be understood that the invention is not limited to the embodiments described above, but is capable of modification and variation without departing from the spirit and scope of the present invention.

Claims

1. The connecting device for fixing the backrest tube and the test port comprises a test port (1), a fixing device (2) and an air duct shell (3), wherein the test port (1) is arranged on the air duct shell (3), and the fixing device (2) is fixed with the test port (1); the fixing device (2) is of a cylindrical structure, and the fixing device (2) is provided with a sealing lining (21), a sealing shell (22), a measuring hole (23) and a telescopic scale (4); the sealing lining (21) is positioned in the sealing shell (22), the sealing lining (21) comprises an inner ring lining (21A) and an outer ring lining (21B), and the sealing shell (22) comprises a shell inner ring (22A) and a shell outer ring (22B); the test port (1) is positioned between an inner ring lining (21A) and an outer ring lining (21B), the inner ring lining (21A) is contacted with an outer ring (22A) of the shell, and the outer ring lining (21B) is contacted with the outer ring (22B) of the shell; the measuring hole (23) is arranged in the center of the fixing device (2), and the telescopic scale (4) is arranged on the measuring hole (23);

the telescopic scale (4) is of a telescopic structure formed by a plurality of hollow tubes in a hollow cylindrical shape, the hollow tubes are made of organic glass, and scales are arranged on the surfaces of the hollow tubes;

the measuring hole (23) is used for fixing the backrest tube, and the measuring hole (23) is of a rectangular structure;

the sealing lining (21) is made of high-temperature compressed sponge; the sealing lining (21) is in interference fit with the test port (1) to form a labyrinth sealing structure;

the connection method comprises the following steps: the backrest tube penetrates into the telescopic scale (4) and penetrates through the measuring hole (23), the length of the backrest tube entering the measuring hole (23) is selected by the telescopic scale (4) according to actual needs, and the test measuring port (1) is inserted into the sealing lining (21) until threads of the backrest tube completely enter the sealing lining (21), so that a test can be performed.