CN105822860A - Non-welding flange structure for shock wave tube - Google Patents

Abstract

The invention discloses a non-welding flange structure for a shock wave tube. The non-welding flange structure is installed at the peripheries of the bonded end surfaces of a first tube body and a second tube body in a sleeving manner, and a first peripheral groove and a second peripheral groove are formed in outer rings of the first tube body and the second tube body respectively. The non-welding flange structure comprises two first semicircular flange discs which are symmetrically arranged in the first peripheral groove, two second semicircular flange discs which are symmetrically arranged in the second peripheral groove, and tightening rings used for peripherally limiting the first semicircular flange discs and the second semicircular flange discs, wherein the tightening rings are located between the first semicircular flange discs and the second semicircular flange discs. According to the non-welding flange structure disclosed by the invention, the first semicircular flange discs and the second semicircular flange discs are peripherally limited through the tightening rings without welding, thus deformation of the tube bodies or the flange discs due to welding is avoided, and the requirements of high linearity and high coaxiality of the tube bodies can be easily met; and moreover, the non-welding flange structure is convenient to install and easy to detach.

Description

Non-welded flange construction for shock tubes

technical field

The invention relates to a flange structure, in particular to a non-welded flange structure for a shock tube.

Background technique

The shock tube is an experimental device that generates high-speed shock waves instantaneously through high and low pressure differences, and then uses the shock waves to heat and pressurize the material to obtain extremely high adiabatic flame temperature and pressure. Since the shock tube can provide relatively broad experimental conditions, Therefore, it is widely used in the research of many disciplines.

Shock tubes use incident and reflected shock waves to compress matter uniformly, non-isentropically, and adiabatically, so the generation and operation of shock waves play a vital role in shock tube experiments. The main parameters affecting shock wave operation are: straightness of pipe body, coaxiality of pipe body and roughness of inner surface of pipe. Therefore, in order to ensure the accuracy of the shock tube experiment, the straightness, coaxiality and surface roughness of the tube body should be improved as much as possible in the design and processing of the shock tube.

In the processing and manufacturing of the shock tube, due to the long length of the shock tube, it is usually necessary to divide the tube body into several sections, and then use a flange structure for connection. Traditional flanges are installed on the pipe body by welding. The high temperature in the welding process will inevitably lead to deformation and bending of the pipe body and the flange, thereby reducing the straightness and coaxiality of the shock tube body and affecting the shock. Waves run.

Contents of the invention

The object of the present invention is to provide a non-welded flange structure for a shock tube, which surrounds the first semicircular flange and the second semicircular flange through a hoop. To limit, without welding, to avoid the deformation of the pipe body or flange caused by welding, to meet the requirements of high straightness and high coaxiality of the pipe body, and easy to install and disassemble.

In order to achieve the above purpose, the non-welded flange structure for the shock tube designed by the present invention is sleeved on the outer circumference of the end face of the first pipe body and the second pipe body, and the first pipe body and the second pipe body The outer ring of the pipe body is respectively provided with a first circumferential groove and a second circumferential groove, which includes two first semicircular flanges symmetrically arranged in the first circumferential groove, two symmetrically arranged in the second The second semicircular flange in the two circumferential grooves, and the tight hoop for circumferentially limiting the first semicircular flange and the second semicircular flange, the tight hoop It is located between the first semicircular flange and the second semicircular flange. In this way, the first semicircular flange and the second semicircular flange are circumferentially limited by the hoop without welding, thereby avoiding deformation of the pipe body or flange caused by welding.

Further, a first annular limiting groove and a second annular limiting groove are opened on both sides of the tightening ring, and the two symmetrically arranged first semicircular flanges are inserted into the first annular limiting groove. A circumferential limit is formed in the position groove, and the two symmetrically arranged second semicircular flanges are embedded in the second annular limit groove to form a circumferential limit. In this way, the first semicircular flange and the second semicircular flange are embedded in the corresponding first annular limiting groove and the second annular limiting groove, which is conducive to improving the height of the first pipe body and the second pipe body. Straightness and coaxiality between.

Further, the first semicircular flange, the clamp ring and the second semicircular flange are all provided with several through holes penetrating through the end faces on both sides, and the several through holes are evenly distributed along the circumferential direction. interval distribution. The first semicircular flange, the clamp ring and the second semicircular flange are fastened and connected by bolt and nut assemblies passing through corresponding through holes. In this way, the first semicircular flange, the hoop and the second semicircular flange are locked by the bolt and nut assembly, and the first pipe body and the second pipe body are clamped, thereby ensuring the height of the pipe body. Straightness and high coaxiality.

Further, the inner diameter of the tight hoop is equal to the outer diameter of the first pipe body or the second pipe body, so as to ensure a tight fit between the tight hoop and the two pipe bodies.

Further, the inner circle of the first semicircular flange coincides with the inner wall of the first circumferential groove, and the inner circle of the second semicircular flange coincides with the inner wall of the second circumferential groove, so that It can ensure the tight fit between the inner ring of the first semicircular flange and the inner wall of the first circumferential groove, and between the inner ring of the second semicircular flange and the inner wall of the second circumferential groove.

Further, the outer ring of the first semicircular flange coincides with the inner wall of the first annular limiting groove, and the outer ring of the second semicircular flange coincides with the inner wall of the second annular limiting groove , so as to ensure tightness between the outer ring of the first semicircular flange and the inner wall of the first annular limiting groove, and between the outer ring of the second semicircular flange and the inner wall of the second annular limiting groove fit.

Further, the distance between the first circumferential groove and the second circumferential groove is equal to the distance between the first annular limiting groove and the second annular limiting groove, so as to facilitate the axial positioning of the hoop.

Still further, the outer edge of the end face of the first pipe body and the second pipe body is provided with an annular stop structure to ensure its coaxiality, so that the straight line between the first pipe body and the second pipe body can be further ensured. degree and concentricity.

Furthermore, an annular sealing ring is provided on the end faces of the first pipe body and the second pipe body, so as to ensure the sealing of the joint between the first pipe body and the second pipe body.

Compared with the prior art, the present invention has the following advantages:

First, the flange structure of the present invention limits the first semicircular flange and the second semicircular flange in the circumferential direction through the hoop without welding, thus avoiding the welding of the pipe body or the flange. out of shape.

Second, the first semicircular flange and the second semicircular flange of the present invention are embedded in the corresponding first annular limiting groove and the second annular limiting groove and then fastened and connected by bolt and nut assemblies. It can ensure the high straightness and high coaxiality of the pipe body.

Its three, the structure of the present invention is simple, easy to install, easy to disassemble, practicality is strong.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a non-welded flange structure for a shock tube;

Fig. 2 is a schematic cross-sectional structure diagram of the tightening ring in Fig. 1;

Fig. 3 is a schematic structural view of the first semicircular flange in Fig. 1;

Among them: the first pipe body 1, the second pipe body 2, the first circumferential groove 3, the second circumferential groove 4, the first semicircular flange 5, the second semicircular flange 6, the clamp Ring 7, first annular limiting groove 8, second annular limiting groove 9, through hole 10, bolt and nut assembly 11, annular stop structure 12, and annular sealing ring 13.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The non-welded flange structure for the shock tube shown in the figure is located between the first pipe body 1 and the second pipe body 2, and the outer rings of the first pipe body 1 and the second pipe body 2 are respectively opened with The first circumferential groove 3 and the second circumferential groove 4, which include two first semicircular flanges 5 symmetrically arranged in the first circumferential groove 3, two symmetrically arranged in the second circumferential groove 4 The inner second semicircular flange 6, and the tight hoop 7 for circumferentially limiting the first semicircular flange 5 and the second semicircular flange 6, the tight hoop 7 It is located between the first semicircular flange 5 and the second semicircular flange 6 . In this way, the first semicircular flange 5 and the second semicircular flange 6 are circumferentially limited by the hoop 7 without welding, thereby avoiding deformation of the pipe body or flange caused by welding.

In the above-mentioned technical solution, a first annular limiting groove 8 and a second annular limiting groove 9 are provided on both sides of the hoop 7 inwardly, and two symmetrically arranged first semicircular flanges 5 are embedded in the first A circumferential limit is formed in the annular limit groove 8, and two symmetrically arranged second semicircular flanges 6 are embedded in the second annular limit groove 9 to form a circumferential limit. In this way, the first semicircular flange 5 and the second semicircular flange 6 are embedded in the corresponding first annular limiting groove 8 and the second annular limiting groove 9, which facilitates the improvement of the first pipe body 1 and the straightness and coaxiality between the second pipe body 2.

In the above technical solution, the first semicircular flange 5, the hoop 7 and the second semicircular flange 6 are all provided with a plurality of through holes 10 penetrating through the end faces of both sides, and the plurality of through holes 10 are along the Evenly spaced in the circumferential direction. The first semicircular flange 5 , the clamp ring 7 and the second semicircular flange 6 are fastened and connected by bolt and nut assemblies 11 passing through corresponding through holes 10 . In this way, the first semicircular flange 5, the clamp ring 7 and the second semicircular flange 6 are locked by the bolt and nut assembly 11, and the first pipe body 1 and the second pipe body 2 are clamped, thereby The high straightness and high coaxiality of the pipe body are guaranteed.

In the above technical solution, the inner diameter of the tight ring 7 is equal to the outer diameter of the first pipe body 1 or the second pipe body 2, so as to ensure the tight fit between the tight ring 7 and the two pipe bodies. The inner ring of the first semicircular flange 5 coincides with the inner wall of the first circumferential groove 3, and the inner ring of the second semicircular flange 6 coincides with the inner wall of the second circumferential groove 4, thereby ensuring the first The inner ring of the semicircular flange 5 and the inner wall of the first circumferential groove 3 , and the inner ring of the second semicircular flange 6 and the inner wall of the second circumferential groove 4 are in close contact. The outer ring of the first semicircular flange 5 coincides with the inwall of the first annular limiting groove 8, and the outer ring of the second semicircular flange 6 coincides with the inner wall of the second annular limiting groove 9, thereby enabling Ensure the tight contact between the outer ring of the first semicircular flange 5 and the inner wall of the first annular limiting groove 8, and between the outer ring of the second semicircular flange and the inner wall of the second annular limiting groove. combine. The distance between the first circumferential groove 3 and the second circumferential groove 4 is equal to the distance between the first annular limiting groove 8 and the second annular limiting groove 9 , so that it is easy to axially locate the clamp ring 7 . The outer edge of the end face where the first pipe body 1 and the second pipe body 2 are fitted is provided with an annular seam structure 12 to ensure their coaxiality, so as to further ensure the straightness of the first pipe body 1 and the second pipe body 2 and coaxiality. An annular sealing ring 13 is also provided on the end surfaces where the first pipe body 1 and the second pipe body 2 fit together, so as to ensure the tightness of the connection between the first pipe body 1 and the second pipe body 2 .

The method of use of the present invention: First, the first pipe body 1 and the second pipe body 2 are split and placed horizontally, and then two first semicircular flanges 5 are symmetrically installed on the first circumference of the first pipe body 1 Into the groove 3, then insert the hoop 7 from the end of the first pipe body 1 with the first circumferential groove 3, so that the two symmetrically arranged first semicircular flanges 5 are inserted into the first ring In the limiting groove 8, slide the hoop 7 so that it is close to the outer ring of the first semicircular flange 5, and then install the two second semicircular flanges 6 symmetrically on the second pipe body 2 In the second circumferential groove 4, push the second pipe body 2 so that two symmetrically arranged second semicircular flanges 6 are embedded in the second annular limiting groove 9, fine-tuning the first semicircular flange 5, The angle of the clamping ring 7 and the second semicircular flange 6 makes the through holes 10 correspond to each other, and the bolt and nut assembly 11 passes through the first semicircular flange 5, the clamping ring 7 and the second half in sequence. The through hole 10 of the circular flange 6 is locked, so that the first pipe body 1 and the second pipe body 2 are clamped to complete the sealed connection.

The above is only a specific embodiment of the present invention. It should be pointed out that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention shall be covered by the protection scope of the present invention. within.

Claims (9)

1. the no-welding type flange arrangement for shock tube, it is sleeved on the first body (1) and end face periphery that the second body (2) fits, the outer ring of described first body (1) and the second body (2) has the first circumferential recess (3), second circumferential recess (4), it is characterized in that: it includes two the first semi-circular flange dishes (5) being symmetricly set in the first circumferential recess (3), two the second semi-circular flange dishes (6) being symmetricly set in the second circumferential recess (4), and for the first semi-circular flange dish (5) and the second semi-circular flange dish (6) being carried out the lock ring circle (7) that circumference is spacing, described lock ring circle (7) is positioned between the first semi-circular flange dish (5) and the second semi-circular flange dish (6).

No-welding type flange arrangement for shock tube the most according to claim 1, it is characterized in that: described lock ring circle (7) two side ends offers first annular stopper slot (8) and the second annular spacing groove (9) respectively towards interior, it is spacing that the symmetrically arranged first semi-circular flange dish (5) of said two forms circumference in embedding first annular stopper slot (8), and it is spacing that the symmetrically arranged second semi-circular flange dish (6) of said two forms circumference in embedding the second annular spacing groove (9).

No-welding type flange arrangement for shock tube the most according to claim 1 and 2, it is characterized in that: be equipped with several through holes running through both sides end face (10) on described first semi-circular flange dish (5), lock ring circle (7) and the second semi-circular flange dish (6), several described through hole (10) along the circumferential direction uniform intervals are distributed；

Described first semi-circular flange dish (5), lock ring circle (7) and the second semi-circular flange dish (6) are fastenedly connected by the bolt and nut component (11) being located in corresponding through hole (10).

No-welding type flange arrangement for shock tube the most according to claim 1 and 2, it is characterised in that: the internal diameter of described lock ring circle (7) and the external diameter of the first body (1) or the second body (2) are equal.

No-welding type flange arrangement for shock tube the most according to claim 1 and 2, it is characterised in that: the inner ring of described first semi-circular flange dish (5) and the inwall of the first circumferential recess (3) overlap；The inner ring of described second semi-circular flange dish (6) and the inwall of the second circumferential recess (4) overlap.

No-welding type flange arrangement for shock tube the most according to claim 2, it is characterised in that: the described outer ring of the first semi-circular flange dish (5) overlaps with the inwall of first annular stopper slot (8)；The described outer ring of the second semi-circular flange dish (6) overlaps with the inwall of the second annular spacing groove (9).

No-welding type flange arrangement for shock tube the most according to claim 2, it is characterised in that: the spacing between described first circumferential recess (3) and the second circumferential recess (4) is equal to the spacing between first annular stopper slot (8) and the second annular spacing groove (9).

No-welding type flange arrangement for shock tube the most according to claim 1 and 2, it is characterised in that: the end face outer rim that described first body (1) and the second body (2) fit is provided with the annular stopper structure (12) ensureing its axiality.

No-welding type flange arrangement for shock tube the most according to claim 8, it is characterised in that: the end face that described first body (1) and the second body (2) fit is additionally provided with O-ring seal (13).