CN208140351U - It is a kind of to survey the fixed attachment device of mouth for backing tube and test - Google Patents

Abstract

The fixed attachment device of mouth is surveyed for backing tube and test the utility model relates to a kind of.Occur corroding since the time is longer and dust currently, mouth is surveyed in the test of most of power plant, causes backing tube to be not fixed firmly and survey mouth poorly sealed etc..The utility model includes that mouth, fixed device and air channel shell are surveyed in test, and test is surveyed mouth and is arranged in air channel shell, and fixed device is surveyed mouth with test and fixed；Fixed device is provided with sealed liner, sealing shell, gaging hole and telescopic scale；Sealed liner is located in sealing shell, and sealed liner includes inner ring liner and outer ring liner, and sealing shell includes shell inner ring and shell outer ring；Test surveys mouth between inner ring liner and outer ring liner, and inner ring liner is in contact with shell inner ring, and outer ring liner is in contact with shell outer ring；The center of fixed device is arranged in gaging hole, and telescopic scale is arranged on gaging hole.The utility model can realize that backing tube is preferably engaged with the serious test survey mouth of corrosion or dust stratification, sealed, and improve the precision of test.

Description

It is a kind of to survey the fixed attachment device of mouth for backing tube and test

Technical field

Survey the fixed attachment device of mouth for backing tube and test the utility model relates to a kind of, be applied to air flow calibration and Backing tube is surveyed mouth with test and is fixed during First air leveling.

Background technique

There are two routine tests in station boiler test at present：Cold conditions air flow calibration and the leveling of cold conditions First air.S type backrest Pipe has many advantages, such as to be not easy to plug, and it is convenient to measure, and is widely used in cold conditions air flow calibration and the leveling test of cold conditions First air In.By multiple field test, it is found that the test of most of power plant is surveyed mouth and corroded since the time is longer, and long test run Cause surface dirt more, the silk plug for causing test to seal and fix backing tube in the process is difficult to and corrosion and the serious survey of dust stratification Mouth engagement well, brings backing tube to be not fixed firmly and survey the problems such as mouth is poorly sealed, has seriously affected the precision and examination of test The process tested brings great inconvenience to testing crew, and such as application No. is 201520308235.7 Chinese patents.

How by S type backing tube and corrosion and dust stratification serious test survey mouth be firmly fixed with good sealing, The attention and thinking of many people are caused.

Utility model content

The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide a kind of structure design conjunction Reason surveys the fixed attachment device of mouth for backing tube and test, using the principle of labyrinth sealing, realizes S type backing tube and rust Erosion and the serious test of dust stratification survey mouth be firmly fixed with good sealing, improve the precision of test, accelerate the process tested, give Field test personnel bring convenience.

The technical scheme in the invention for solving the above technical problem is：One kind being surveyed mouth with test for backing tube and fixed Attachment device, including test surveys mouth, fixed device and air channel shell, and the test surveys mouth setting in air channel shell, described Fixed device is surveyed mouth with test and is fixed；It is characterized in that, the fixed device is cylindrical structure, the fixed device is provided with Sealed liner, sealing shell, gaging hole and telescopic scale；The sealed liner is located in sealing shell, the sealed liner packet Inner ring liner and outer ring liner are included, the sealing shell includes shell inner ring and shell outer ring；The test surveys mouth and is located at inner ring Between liner and outer ring liner, the inner ring liner is in contact with shell inner ring, and the outer ring liner is in contact with shell outer ring； The center of fixed device is arranged in the gaging hole, and the telescopic scale is arranged on gaging hole.It is reasonable in design, it can be achieved that leaning on Penstock is preferably engaged with the serious test survey mouth of corrosion or dust stratification, is sealed, and improves the precision of test.

Furthermore, the telescopic scale is the telescopic structure of several pitch circle cylindricality hollow pipes composition, the sky The material of heart pipe is organic glass, and the surface of the hollow pipe has scale.The telescopic structure of telescopic scale can be flexible The depth that ground gos deep into pipe backing tube is demarcated, and telescopic structure can reduce the volume of equipment, easy to carry.

Furthermore, the gaging hole is rectangle structure for fixing backing tube, the gaging hole.The survey of rectangle structure Hole and the shape of backrest tube section match, and can preferably fix the direction of backing tube.

Furthermore, the material of the sealed liner is high fever compressed sponge.Make sealed liner that there is high temperature resistant, corrosion resistant It is erosion, wear-resistant and the features such as be unlikely to deform, it can carry out using and the reliability of guarantee test for a long time.

Furthermore, mouth interference fit is surveyed in the sealed liner and test, forms labyrinth seal structure.Mouth is surveyed in test Screw thread protrude into and form labyrinth seal structure in sealed liner, sealing effect is good.

A kind of connection method as described above for surveying the fixed attachment device of mouth for backing tube and test, feature exist In the connection method is as follows：Backing tube is penetrated into the inside of telescopic scale and passes through gaging hole, according to actual needs using stretching Contracting formula scale chooses backing tube and enters the length of gaging hole, will test survey mouth insertion sealed liner inside until its screw thread completely into Enter in sealed liner, can be tested.Easy to operate, test accuracy is high.

The utility model compared with prior art, has the following advantages that and effect：

1）Using labyrinth sealing principle, test not only may be implemented and survey the good sealing of mouth, and can be to backing tube It is firmly fixed, improves the precision of test, accelerate the process of test.

2）Sealed liner uses high fever compressed sponge, has the characteristics that high temperature resistant, corrosion-resistant, wear-resistant and be unlikely to deform, The service life for increasing attachment device improves the accuracy of test.

3）The depth that telescopic scale can neatly go deep into pipe backing tube is demarcated, and it is easy to efficiently solve circle ruler The problem of modification and the wooden ruler heaviness, and telescopic structure can reduce the volume of equipment, it is easy to carry.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model embodiment.

Fig. 2 is the sectional view in the face A-A in Fig. 1.

In figure：Mouth 1, fixed device 2, air channel shell 3, telescopic scale 4, sealed liner 21, inner ring liner are surveyed in test 21A, outer ring liner 21B, sealing shell 22, shell inner ring 22A, shell outer ring 22B, gaging hole 23.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair The explanation of the utility model and the utility model is not limited to following embodiment.

Embodiment.

It is a kind of to survey the fixed attachment device of mouth for backing tube and test referring to Fig. 1 to Fig. 2, including test surveys mouth 1, solid Determine device 2 and air channel shell 3, test surveys the setting of mouth 1 in air channel shell 3, and fixed device 2 is surveyed mouth 1 with test and fixed.

Fixed device 2 is cylindrical structure, and fixed device 2 is provided with sealed liner 21, sealing shell 22, gaging hole 23 and stretches Contracting formula scale 4；The material of sealed liner 21 is high fever compressed sponge, has high temperature resistant, corrosion-resistant, wear-resistant and be unlikely to deform Feature；Sealed liner 21 is located in sealing shell 22, and sealed liner 21 includes inner ring liner 21A and outer ring liner 21B, and sealing is outer Shell 22 includes shell inner ring 22A and shell outer ring 22B；Test is surveyed mouth 1 and is located between inner ring liner 21A and outer ring liner 21B, close It seals liner 21 and test is surveyed mouth 1 and is interference fitted, form labyrinth seal structure, sealing effect is good, and test accuracy is high；Inner ring liner 21A is in contact with shell inner ring 22A, and outer ring liner 21B is in contact with shell outer ring 22B.

The center of fixed device 2 is arranged in gaging hole 23, and gaging hole 23 is rectangle structure for fixing backing tube, gaging hole 23, Match with the cross sectional shape of backing tube, plays the role of fixed backing tube direction.

Telescopic scale 4 is arranged on gaging hole 23, and telescopic scale 4 is the telescopic of several pitch circle cylindricality hollow pipes composition Structure, hollow pipe are connected to gaging hole 23；The material of hollow pipe is organic glass, and the surface of hollow pipe has scale, for measuring Backing tube penetrates the length of gaging hole 23.

A kind of connection method that the fixed attachment device of mouth is surveyed for backing tube and test as above, connection method are as follows： Backing tube is penetrated into the inside of telescopic scale 4 and passes through gaging hole 23, chooses backrest using telescopic scale 4 according to actual needs Pipe enters the length of gaging hole 23, and mouth 1 is surveyed in test and is inserted into the inside of sealed liner 21 up to its screw thread is completely into sealed liner In 21, it can be tested.

Although the utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model, Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch, It all should belong to the protection range of the utility model.

Claims (5)

1. a kind of survey the fixed attachment device of mouth for backing tube and test, including mouth is surveyed in test（1）, fixed device（2）And wind Road shell（3）, the test survey mouth（1）It is arranged in air channel shell（3）On, the fixed device（2）Mouth is surveyed with test（1）Gu It is fixed；It is characterized in that, the fixed device（2）For cylindrical structure, the fixed device（2）It is provided with sealed liner（21）, Sealing shell（22）, gaging hole（23）With telescopic scale（4）；The sealed liner（21）Positioned at sealing shell（22）It is interior, it is described Sealed liner（21）Including inner ring liner（21A）With outer ring liner（21B）, the sealing shell（22）Including shell inner ring （22A）With shell outer ring（22B）；Mouth is surveyed in the test（1）Positioned at inner ring liner（21A）With outer ring liner（21B）Between, it is described Inner ring liner（21A）With shell inner ring（22A）It is in contact, the outer ring liner（21B）With shell outer ring（22B）It is in contact；Institute State gaging hole（23）Setting is in fixed device（2）Center, the telescopic scale（4）It is arranged in gaging hole（23）On.

2. according to claim 1 survey the fixed attachment device of mouth for backing tube and test, which is characterized in that described to stretch Contracting formula scale（4）For the telescopic structure of several pitch circle cylindricality hollow pipes composition, the material of the hollow pipe is organic glass, institute The surface of hollow pipe is stated with scale.

3. according to claim 1 survey the fixed attachment device of mouth for backing tube and test, which is characterized in that the survey Hole（23）For fixing backing tube, the gaging hole（23）For rectangle structure.

4. according to claim 1 survey the fixed attachment device of mouth for backing tube and test, which is characterized in that described close Seal liner（21）Material be high fever compressed sponge.

5. according to claim 1 survey the fixed attachment device of mouth for backing tube and test, which is characterized in that described close Seal liner（21）Mouth is surveyed with test（1）Interference fit forms labyrinth seal structure.