阅读说明：本技术 一种可调节的试件筒后板 (Adjustable test piece barrel rear plate ) 是由 黄唯纯 杨俊鸿 马仁杰 颜学俊 钱斯文 卢明辉 于 2020-06-30 设计创作，主要内容包括：本发明提供一种可调节的试件筒后板,具体涉及饲料生产装置领域,括底板和一筒体状的阻抗管,所述底板上设密封柱,密封柱的两侧分别设有第一卡板和第二卡板,所述第一卡板和所述第二卡板的端部与底板衔接；且所述密封柱嵌入所述阻抗管内,所述阻抗管的侧壁分别位于第一卡板和密封柱、第一卡板和密封柱之间。本发明可解决轴向推入试件筒后板带来的气密性和固定问题。(The invention provides an adjustable test piece barrel rear plate, and particularly relates to the field of feed production devices, which comprises a bottom plate and a barrel-shaped impedance tube, wherein a sealing column is arranged on the bottom plate, a first clamping plate and a second clamping plate are respectively arranged on two sides of the sealing column, and the end parts of the first clamping plate and the second clamping plate are connected with the bottom plate; and the sealing column is embedded into the impedance tube, and the side wall of the impedance tube is respectively positioned between the first clamping plate and the sealing column and between the first clamping plate and the sealing column. The invention can solve the problems of air tightness and fixation caused by axially pushing the back plate of the test piece cylinder.)

1. The utility model provides a test piece section of thick bamboo backplate with adjustable which characterized in that: the device comprises a bottom plate and a cylindrical impedance tube, wherein a sealing column is arranged on the bottom plate, a first clamping plate and a second clamping plate are respectively arranged on two sides of the sealing column, and the end parts of the first clamping plate and the second clamping plate are connected with the bottom plate; and the sealing column is embedded into the impedance tube, and the side wall of the impedance tube is respectively positioned between the first clamping plate and the sealing column and between the first clamping plate and the sealing column.

2. The adjustable specimen holder backing plate of claim 1, wherein: the impedance tube is of a cylindrical structure with a rectangular cross section, and the sealing column is matched with the impedance tube; and the first clamping plate and the second clamping plate are both of flat plate structures.

3. An adjustable specimen canister backing plate as claimed in claim 2, wherein: and an annular sealant filling groove is formed in the periphery of the sealing column.

4. An adjustable specimen canister backing plate as claimed in claim 3, wherein: the side walls of the first clamping plate and the second clamping plate are respectively provided with a first pressure equalizing hole and a second pressure equalizing hole, through holes are formed in two sides of the end part of the impedance tube, and the first pressure equalizing hole and the second pressure equalizing hole are communicated with the sealant filling groove through the through holes.

5. The adjustable specimen holder backing plate of claim 4, wherein: the bottom plate is a square plate with the side length of 100 mm, and the first clamping plate and the second clamping plate are symmetrically arranged; the first clamping plate is a rectangular plate with the length of 68 mm and the width of 30 mm; the diameters of the first pressure equalizing hole and the second pressure equalizing hole are 6.2 mm; the sealing column is of a cube-shaped structure with the length, width and height of 48 mm; and the size of the bottom plate is more than 20 mm; the thickness of the first clamping plate and the thickness of the second clamping plate are both smaller than 20 mm.

6. An adjustable specimen canister backing plate as claimed in claim 5, wherein: the bottom plate, the first clamping plate, the second clamping plate and the sealing column are of an integrally formed structure.

Technical Field

The invention belongs to the field of feed production devices, and particularly relates to an adjustable test piece barrel rear plate.

Background

The specimen barrel back plate is an indispensable important member in the noise resistance tube. The impedance tube is a device for measuring the vertical incidence sound absorption coefficient of a sound absorption material, the main body of the impedance tube is a rectangular (square) or circular cross-section tube which is arranged on a rigid wall, and a sound source is arranged at one end of the tube; the middle part is provided with a movable probe type microphone or two fixed position microphones; the other end is reserved as a mounting test piece, and when the test piece is axially inserted into the tube, the impedance tube needs to be sealed by a test piece barrel rear plate and fixed on the impedance tube. The novel adjustable test piece barrel rear plate is mainly suitable for an impedance tube or other closed pipelines for acoustic testing;

the development of acoustic materials over the last 20 years, and in particular the emergence of acoustic metamaterials, is increasingly common with the use of square impedance tubes with small sides (less than 50 mm). This change leads to in the standard about the design suggestion of rectangle impedance pipe difficult to implement in the reality, can greatly increased square impedance pipe's the processing degree of difficulty, or improve the manufacturing cost of impedance pipe, be unfavorable for square pipe's integrated into one piece, influence the pipe wall straightness, the processing of removable cover window also can influence the roughness of impedance pipe inner wall. By adopting the mode of pushing the test piece in the axial direction, the side wall of the impedance tube is not required to be windowed, the sealing problem of the movable cover plate is avoided, the problems of processing difficulty and cost of the traditional process of the small-size square impedance tube can be avoided better, but the problems of air tightness and the like caused by the fact that the test piece barrel is pushed in the axial direction and the plate is provided with a rear plate are still solved

To the above-mentioned not enough, need a test piece section of thick bamboo back plate with adjustable now, can solve gas tightness and the fixed problem that axial pushing test piece section of thick bamboo back plate brought.

Disclosure of Invention

The invention aims to provide an adjustable test piece barrel rear plate, which not only can conveniently realize the adjustment of the roller distance, but also has low device cost.

The invention provides the following technical scheme:

an adjustable test piece barrel rear plate comprises a bottom plate and a barrel-shaped impedance tube, wherein a sealing column is arranged on the bottom plate, a first clamping plate and a second clamping plate are respectively arranged on two sides of the sealing column, and the end parts of the first clamping plate and the second clamping plate are connected with the bottom plate; and the sealing column is embedded into the impedance tube, and the side wall of the impedance tube is respectively positioned between the first clamping plate and the sealing column and between the first clamping plate and the sealing column.

Preferably, the impedance tube is a cylindrical structure with a rectangular cross section, and the sealing column is matched with the impedance tube; and the first clamping plate and the second clamping plate are both of flat plate structures.

Preferably, the periphery of the sealing column is provided with an annular sealant filling groove.

Preferably, the side walls of the first clamping plate and the second clamping plate are respectively provided with a first pressure equalizing hole and a second pressure equalizing hole, through holes are formed in two sides of the end part of the impedance tube, and the first pressure equalizing hole and the second pressure equalizing hole are communicated with the sealant filling groove through the through holes.

Preferably, the bottom plate is a square plate with the side length of 100 mm, and the first clamping plate and the second clamping plate are symmetrically arranged; the first clamping plate is a rectangular plate with the length of 68 mm and the width of 30 mm; the diameters of the first pressure equalizing hole and the second pressure equalizing hole are 6.2 mm; the sealing column is of a cube-shaped structure with the length, width and height of 48 mm; and the size of the bottom plate is more than 20 mm; the thickness of the first clamping plate and the thickness of the second clamping plate are both smaller than 20 mm.

Preferably, the bottom plate, the first clamping plate, the second clamping plate and the sealing column are of an integrally formed structure.

The invention has the beneficial effects that:

the novel test piece cylinder rear plate has a simple structure and is easy to mount, dismount and maintain; the side wall of the impedance tube does not need to be windowed: no external damage exists, the processing precision is improved, and the difficulty is reduced; ensuring that the air tightness of the impedance tube meets the standard requirement; the first pressure equalizing hole and the second pressure equalizing hole of the test piece barrel rear plate are used for filling sealant and fastening screw installation; sealant filling grooves are reserved on the side walls of the first clamping plate and the second clamping plate and are used as voltage-sharing holes of the test piece barrel rear plate, and the test piece barrel rear plate is pushed into the impedance tube.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is an overall structural view of the present invention;

FIG. 2 is a partial block diagram of the present invention;

FIG. 3 is a dimensional block diagram of the present invention;

labeled as: 1. a base plate; 2. a first clamping plate; 3. a second clamping plate; 4. sealing the column; 5. a first pressure equalizing hole; 6. a second pressure equalizing hole; 7. a sealant filling tank; 8. an impedance tube.

Detailed Description

As shown in fig. 1 to 3, an adjustable test piece tube rear plate comprises a bottom plate 1 and a tube-shaped impedance tube 8, wherein a sealing column 4 is arranged on the bottom plate 1, a first clamping plate 2 and a second clamping plate 3 are respectively arranged on two sides of the sealing column 4, and the end parts of the first clamping plate 2 and the second clamping plate 3 are connected with the bottom plate 1; the sealing column 4 is embedded into the impedance tube 8, and the side wall of the impedance tube 8 is respectively positioned between the first clamping plate 2 and the sealing column 4 and between the first clamping plate 2 and the sealing column 4; the impedance tube 8 is a cylindrical structure with a rectangular cross section, and the sealing column 4 is matched with the impedance tube 8; the first clamping plate 2 and the second clamping plate 3 are both of a flat-plate structure; the rectangular impedance tube is integrated with the test piece barrel, a movable sealing column 4 is arranged on the side surface of the rectangular impedance tube to be transversely inserted into the test piece, and a sealant is used for sealing between the sealing column 4 and the impedance tube 8;

wherein, the periphery of the sealing column 4 is provided with an annular sealant filling groove 7; the side walls of the first clamping plate 2 and the second clamping plate 3 are respectively provided with a first pressure equalizing hole 5 and a second pressure equalizing hole 6, and two sides of the end part of the impedance tube 8 are provided with through holes which communicate the first pressure equalizing hole 5 and the second pressure equalizing hole 6 with a sealant filling groove 7; injecting sealant into the sealant injection groove 7 through the first pressure equalizing hole 5 and the second pressure equalizing hole 6, wherein the type of the sealant is selected according to the condition of the reagent; the bottom plate 1 is a square plate with the side length of 100 mm, and the first clamping plate 2 and the second clamping plate 3 are symmetrically arranged; the first clamping plate 2 is a rectangular plate with the length of 68 mm and the width of 30 mm; the diameters of the first pressure equalizing hole 5 and the second pressure equalizing hole 6 are 6.2 mm; the sealing column 4 is a cube-shaped structure with the length, width and height of 48 mm; the size of the bottom plate 1 is more than 20 mm; the thicknesses of the first clamping plate 2 and the second clamping plate 3 are both less than 20 mm; the size can meet the experimental requirements; the bottom plate 1, the first clamping plate 2, the second clamping plate 3 and the sealing column 4 are integrally formed, so that the service life of the device can be prolonged;

the working mode of the invention is as follows:

as shown in fig. 1 to 3, the impedance tube 8 is axially pushed into the test piece, thereby causing problems of air tightness and tightness of the rear plate of the test piece barrel; due to the air tightness of the rest part of the impedance tube 8, the back plate of the test piece barrel is difficult to push due to the problem of air pressure balance, and therefore, a pressure equalizing hole needs to be added. Because the thickness of the rear plate of the test piece cylinder is larger (not less than 20mm), the air tightness problem needs to be considered. Because the sample section of thick bamboo backplate quality is great (metal material), need consider its fastening problem. The device has simple structure, and is easy to install, disassemble and maintain; the side wall of the impedance tube does not need to be windowed: no external damage exists, the processing precision is improved, and the difficulty is reduced; ensuring that the air tightness of the impedance tube meets the standard requirement; the first pressure equalizing hole 5 and the second pressure equalizing hole 6 of the test piece barrel rear plate are used for filling sealant and fastening screw installation; sealant filling grooves are reserved on the side walls of the first clamping plate 2 and the second clamping plate 3, and are used as voltage-sharing holes of the test piece cylinder rear plate, so that the test piece cylinder rear plate can be pushed into the impedance tube conveniently; the rectangular impedance tube is integrated with the test piece barrel, a movable sealing column 4 is arranged on the side surface of the rectangular impedance tube to be transversely inserted into the test piece, and a sealant is used for sealing between the sealing column 4 and the impedance tube 8;

although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.