CN109944869A - Integrated assembly of large-diameter bellows and universal joints suitable for vacuum deformation - Google Patents

Abstract

The invention discloses a large-diameter corrugated pipe universal joint integrated assembly, comprising a large-diameter corrugated pipe, a support frame, a pin shaft, a support ring, and a connecting bolt. The large-diameter corrugated pipe is composed of two flanges and thin-walled hydraulic corrugations. The two flanges are welded on the two ends of the bellows respectively. The two flanges are connected with the end of the bellows by internal and external welding. For intermittent welding to ensure sufficient connection strength. The invention plays an important role in solving the problem of accurate direction of the irradiation beam in the comprehensive simulation test of the large-scale space environment and ensuring the test index.

Description

Integrated assembly of large-diameter bellows and universal joints suitable for vacuum deformation

technical field

The invention belongs to the technical field of space comprehensive environment simulation test equipment, in particular, the invention relates to a device for a large-diameter bellows universal joint adapted to vacuum deformation.

Background technique

Before the spacecraft is launched, sufficient space environment tests are required to verify the reliability of the spacecraft. The space comprehensive environment simulation mainly simulates the vacuum, heat sink, high and low temperature/thermal cycle, and charged particle irradiation environment in the space environment, and realizes the research of various space environment effects of materials, devices and system-level components.

At present, mature space environment simulation equipment can realize the simulation of space environment such as vacuum, heat sink, high and low temperature/thermal cycle in a vacuum container. If it is necessary to simulate the irradiation environment of cosmic charged particles, it is necessary to build a set of beam currents Pipeline to generate the cosmic charged particle beam, and then connect the beam pipeline to the vacuum container, and introduce the cosmic charged particle beam into the vacuum container, so as to obtain space synthesis such as vacuum, heat sink, high and low temperature/thermal cycle, charged particle irradiation, etc. surroundings. However, the connection between the beam line and the container is more difficult, because the vacuum container is in a vacuum state during operation. Under the action of the external atmospheric pressure, the container will be deformed to a certain extent, which requires the connection between the beam line and the container. It can adapt to this deformation, otherwise it is easy to cause excessive stress at the connection and lead to vacuum leakage.

For this reason, in reality, a large-diameter bellows universal joint device that can adapt to vacuum deformation is very much needed. The flexible connection between the beam pipeline and the vacuum container can be realized. The component can withstand the axial pressure during vacuuming, and can also The deformation of the container during self-adaptive vacuuming solves the problem of connecting large-diameter pipelines and vacuum containers.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an integrated assembly of bellows and universal joints for connecting large-diameter pipelines and vacuum containers. deformation.

The object of the invention is to be achieved through the following technical solutions:

The large-diameter bellows universal joint integrated assembly includes a large-diameter bellows, a support frame, a pin, a support ring, and a connecting bolt. The large-diameter bellows is formed by welding two flanges and a thin-walled hydraulic bellows. Two flanges are welded on both ends of the bellows respectively, and the two flanges are connected with the end of the bellows by internal and external welding. Ensure sufficient connection strength.

Further, the outer end faces of the two flanges are sealing surfaces, which are respectively connected with the beam pipeline and the vacuum container; the support frame is welded by a flange connection ring and two support ear plates, and the flange connection ring has threaded holes, Fix the support frame and the flange (that is, the flanges welded on both sides of the bellows) by bolting.

Further, there are pin holes on the support lugs, which are connected with the pin holes on the support ring through pin shafts. After connecting with the support rings, the support frame can rotate around the axes of the pin holes on the two support lugs.

Among them, the support ring is a circular ring structure, sleeved on the outer ring of the corrugated pipe, and there are 4 pin shaft holes on the support ring.

Further, the two support frames are arranged vertically in a cross, and are hinged with the support ring through four pin shafts, and one support frame is connected with a pair of support ring pin shaft holes, then the support frame can rotate around the axis of the pair of pin shaft holes, The other support frame is connected with another pair of support ring pin holes, then the support frame can be rotated around the axis of the other pair of pin shaft holes, so that the two support frames and the support ring constitute a universal with two-direction rotation function. The joint assembly, the universal joint assembly is connected with the flanges at both ends of the bellows through the flange connection ring of the support frame, which can not only support the large-diameter bellows in the axial direction, but also have the freedom of rotation in two directions. It is suitable for the relative bending deformation of the beam pipeline and the vacuum container connected on both sides when the vacuum is evacuated.

Preferably, the wall thickness of the hydraulic bellows is 0.8mm-1.5mm.

Preferably, the wall thickness of the support frame and the support ring is 15mm-20mm.

Preferably, the diameter of the integrated assembly of the large-diameter bellows and universal joint is 1000mm-1500mm.

The large-diameter bellows universal joint integrated assembly has a maximum diameter of 1500 mm; and has two rotational degrees of freedom, which can adapt to the relative deformation of the beam pipeline and the vacuum container connected on both sides during vacuuming . For solving the comprehensive simulation test of large-scale space environment, the direction of the irradiation beam is accurate, and it plays an important role in ensuring the test index. In addition, this structure has positive significance for ensuring the axial docking of large pipelines in engineering.

Description of drawings:

FIG. 1 is a schematic structural diagram of an integrated assembly of a large-diameter bellows universal joint according to an embodiment of the present invention.

Among them, 1-large diameter corrugated pipe; 2-support frame; 3-pin shaft; 4-support ring.

Figure 1-1 is a view of the C-direction of the integrated assembly of the large-diameter bellows universal joint according to the present invention.

FIG. 2 is a schematic cross-sectional view of the corrugated tube in the present invention.

Among them, 11-flange; 12-hydraulic bellows.

Figure 2-1 is a partial enlarged view A of the connection between the flange and the bellows in the present invention.

3 is a schematic cross-sectional view of the support frame in the present invention.

Fig. 3-1 is a sectional view of the support frame of the present invention along the B direction.

FIG. 4 is a schematic cross-sectional view of the support ring in the present invention.

Figure 4-1 is a D-direction sectional view of the support ring in the present invention.

Specific implementation plan:

The following introduces specific embodiments as the content of the present invention, and the content of the present invention is further clarified below through the specific embodiments. Of course, the following specific embodiments are described only to illustrate different aspects of the present invention and should not be construed as limiting the scope of the present invention.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of the integrated assembly of the large-diameter bellows universal joint of the present invention. Wherein, the large-diameter corrugated pipe universal joint integrated assembly includes a large-diameter corrugated pipe 1 , a support frame 2 , a pin shaft 3 , and a support ring 4 . Figure 1-1 is a view of the C-direction of the integrated assembly of the large-diameter bellows universal joint according to the present invention. Among them, the support ring is a circular ring structure, sleeved on the outer ring of the corrugated pipe, and there are 4 pin shaft holes on the support ring.

Referring to FIG. 2, FIG. 2 shows a schematic cross-sectional view of the bellows in the present invention, wherein the large-diameter bellows 1 is formed by welding two flanges 11 and a thin-walled hydraulic bellows 12, and the outer end faces of the two flanges 11 are welded. As the sealing surface, it is used to connect with the beam pipeline and the vacuum container respectively. The maximum diameter of the large-diameter bellows can reach 1500mm. Referring to Figure 2-1, Figure 2-1 is a partial enlarged view A of the connection between the flange and the bellows in the present invention, wherein the two flanges and the ends of the bellows are connected by internal and external welding, and the interior is sealed and welded to ensure Vacuum tightness when evacuated, and intermittent welding on the outside to ensure sufficient connection strength.

Referring to Figures 3, 3-1, 4, and 4-1, Figure 3 shows a schematic cross-sectional view of the support frame in the present invention. Fig. 3-1 is a sectional view of the support frame of the present invention along the B direction. Figure 4 shows a schematic cross-sectional view of the support ring in the present invention. Figure 4-1 is a D-direction sectional view of the support ring in the present invention. Among them, between the two flanges 11 and outside the thin-walled hydraulic bellows 12, two support frames 2 are installed crosswise, and the support frames 2 are hinged with the support ring 4 through four pins 3 to form a universal joint. The universal joint is connected with the two flanges 11 of the large-diameter bellows 1 through the support frame 2. When vacuuming, it supports the large-diameter bellows 1 in the axial direction, and has two rotational degrees of freedom. Adapt to the bending deformation of the large-diameter corrugated pipe 1.

In order to make the thin-walled hydraulic bellows have sufficient flexibility and not generate excessive bending stress during deformation, and in order to make the support frame and the support ring as light as possible while supporting the bellows axially, the finite element method is used to The bellows wall thickness, support environment and the structure of the support ring are subjected to force analysis. The geometric model of the bellows universal joint integrated assembly with different structural parameters is established and meshed, and its mechanical performance parameters are obtained through simulation calculation. After optimizing the design, the final structural parameters of the bellows and universal joint integrated components are as follows: the wall thickness of the hydraulic bellows is 0.8mm-1.5mm, the wall thickness of the support frame and the support ring is 15mm-20mm, and the large-diameter bellows universal The diameter of the integrated assembly is 1000mm-1500mm.

Although the specific embodiments of the present patent have been described and illustrated in detail above, it should be pointed out that various equivalent changes and modifications can be made to the above-mentioned embodiments according to the concept of the present patent, and the resulting functional effects are still Anything beyond the spirit covered by the description and drawings shall fall within the protection scope of this patent.

Claims (8)

1. heavy caliber bellows universal joint integral component, including heavy caliber bellows, support frame, pin shaft and support ring, connection Bolt, the heavy caliber bellows are welded by two flanges with thin-walled hydraulic-formed bellows, and two flanges are respectively welded at wave The both ends of line pipe, wherein two flanges are connect by the way of interior external welding with corrugated tube end, and inside is sealing welding to protect Vacuum leakproofness when card vacuumizes, outside are discontinuous welding to guarantee enough bonding strengths.

2. heavy caliber bellows universal joint integral component as described in claim 1, wherein the end face outside of two flanges is Sealing surface is connect with line pipeline, vacuum tank respectively；Support frame is welded by flanged joint ring and two support otic placodes, There is threaded hole on flanged joint ring, support frame and flange (being welded on the flange of bellows two sides) is bolted solid It is fixed.

3. heavy caliber bellows universal joint integral component as claimed in claim 2, wherein there is pin hole on support otic placode, with Pin hole in support ring is connected by pin shaft, after being connect with support ring, pin shaft axially bored line of the support frame on two support otic placodes Rotation.

4. heavy caliber bellows universal joint integral component as described in claim 1, wherein support ring is a circular ring structure, Cover has 4 pin shaft holes on the outer ring of bellows, support ring.

5. heavy caliber bellows universal joint integral component as described in claim 1, wherein two support frame intersecting vertical cloth It sets, hinged by four pin shafts and support ring, one of support frame is connect with a pair of of support ring pin shaft hole, then the support frame can Axis around a pair of of pin shaft hole rotates, another support frame is connect with another pair support ring pin shaft hole, then the support frame can be around another The axis of a pair of of pin shaft hole rotates, in this way, two support frames and support ring constitute ten thousand with both direction rotating function To the component of section, this cardan universal joint component passes through the flanged joint of bracing frame flange connection ring and bellows both ends, both can be It plays a supporting role on axial to heavy caliber bellows, and the rotational freedom with both direction, adapts to the beam of two sides connection The local inclination deformation of flow tube line and vacuum tank when vacuumizing.

6. heavy caliber bellows universal joint integral component as described in claim 1, wherein the wall thickness of heavy caliber bellows is 0.8mm-1.5mm。

7. heavy caliber bellows universal joint integral component as described in claim 1, wherein the wall thickness of support frame and support ring For 15mm-20mm.

8. heavy caliber bellows universal joint integral component as described in claim 1, wherein heavy caliber bellows universal joint one The latus rectum of body component is 1000mm-1500mm.