Vacuum rotary joint

Abstract

The utility model provides a vacuum rotary joint, which relates to the technical field of rotary joints and comprises a rotary joint body, shaft grooves are arranged on the outer surfaces of two sides of the rotary joint body, a connecting hole is arranged on the inner wall of one side of one shaft groove, sealing grooves are symmetrically arranged on the inner wall of the connecting hole, and the sealing grooves are arranged on the inner wall of the connecting hole. And sealing pieces are arranged on the inner surfaces of the two sealing grooves. According to the utility model, an external vacuum hose connecting valve is in threaded connection, a valve body penetrates through the rotating shaft, the vacuum hose penetrates through the main large surface of the blowing plate through the related through hole part of the rotating joint, but when the blowing turnover plate rotates by 0-90 degrees, the rotating shaft and the rotating body necessarily rotate around various connecting bodies mutually, and vacuum sealing is kept complete during rotation; the vacuum hose and the rotary joint passively receive the angle brought by the air blowing plate together, but the vacuum hose cannot be twisted, bent or shrunken by suction at the moment, so that the production efficiency is effectively improved, the failure rate is reduced, and the operation safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary joints, in particular to a vacuum rotary joint. Background Art

[0002] At present, large-scale PET preform injection molding machines have three-station and four-station preform removal devices. Foreign equipment is also equipped with a blowing preform removal plate to ensure that the temperature of the preform is kept below 45° during the falling process. The blowing plate is equipped with a preform suction cylinder and a blowing rod. The preform suction cylinder uses vacuum to firmly fix the preform in the preform removal cylinder, and the blowing rod blows air to cool the bottom of the preforms in other stations.

[0003] In the prior art, when the equipment is running, due to the lack of a rotating joint to connect the vacuum tube and the blowing plate, the vacuum tube becomes entangled as the blowing plate rotates, causing the vacuum tube to be twisted, stretched or damaged, affecting the normal embryo suction fixation and blowing cooling operations, and affecting the working efficiency and production quality of the equipment. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that, when the equipment is running, due to the lack of a rotary joint to connect the vacuum tube and the blowing plate, the vacuum tube is entangled with the rotation of the blowing plate, which may cause the vacuum tube to be twisted, stretched or damaged, affecting the normal embryo suction fixation and blowing cooling operations, and affecting the working efficiency and production quality of the equipment, and a vacuum rotary joint is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a vacuum rotary joint, comprising: a rotary joint body, the outer surfaces of both sides of the rotary joint body are provided with shaft grooves, one side inner wall of one of the shaft grooves is provided with a connecting hole, the inner wall of the connecting hole is symmetrically provided with sealing grooves, the inner surfaces of the two sealing grooves are provided with seals, the inner surfaces of the two shaft grooves are provided with bearings, the inner surfaces of the two bearings are provided with rotating shafts, and the top of the rotary joint body is provided with a through hole.

[0006] Preferably, a first pipe thread is formed on an outer surface of one of the rotating shafts, and a second pipe thread is formed on an inner surface of the through hole.

[0007] Preferably, the through hole is connected to the connecting hole.

[0008] Preferably, a retaining spring is provided on the outer surface of the other rotating shaft.

[0009] Preferably, the inner surface of the connecting hole is matched with the outer surfaces of the two rotating shafts.

[0010] Preferably, the inner surfaces of the two seals are fitted to the outer surfaces of the two rotating shafts, and the connecting hole is connected to the other shaft groove.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] 1. In the utility model, the external vacuum hose is connected to the valve by threaded connection, the valve body passes through the rotating shaft, and the vacuum hose intersects with the main surface of the blowing plate through the relevant through-hole parts of the rotating joint. However, when the blowing flip plate rotates 0-90°, the rotating shaft and the rotating body rotate around various connecting bodies as necessary. The rotation keeps the vacuum seal intact, and the vacuum hose and the rotating joint passively accept the angle brought by the blowing plate. However, at this time, the vacuum hose will not be twisted, bent or deflated, which effectively promotes production efficiency, reduces failure rate and improves operation safety.

[0013] 2. In the present invention, both seals are made of Teflon material. The low friction coefficient of Teflon makes the seals have good wear resistance and high temperature stability, increases the stability of the seals in use, and prolongs the service life of the seals. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a vacuum rotary joint is proposed for the utility model;

[0015] Figure 2 A cross-sectional view of a vacuum rotary joint is provided for the utility model;

[0016] Figure 3 Another angle sectional view of a vacuum rotary joint proposed by the utility model;

[0017] Figure 4 The utility model provides a side view of a vacuum rotary joint.

[0018] Legend: 1. Rotary joint body; 2. Bearing; 3. Circlip; 4. First pipe thread; 5. Second pipe thread; 6. Through hole; 7. Rotating shaft; 8. Seal; 9. Shaft groove; 10. Seal groove; 11. Connecting hole. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0021] Embodiment 1, as Figure 1-Figure 4 As shown, the utility model provides a vacuum rotary joint, comprising: a rotary joint body 1, shaft grooves 9 are provided on the outer surfaces of both sides of the rotary joint body 1, a connecting hole 11 is provided on the inner wall of one side of one of the shaft grooves 9, and sealing grooves 10 are symmetrically provided on the inner wall of the connecting hole 11, and sealing members 8 are provided on the inner surfaces of the two sealing grooves 10, bearings 2 are provided on the inner surfaces of the two shaft grooves 9, and rotating shafts 7 are provided on the inner surfaces of the two bearings 2, a through hole 6 is provided on the top of the rotary joint body 1, a first pipe thread 4 is provided on the outer surface of one of the rotating shafts 7, a second pipe thread 5 is provided on the inner surface of the through hole 6, the through hole 6 is connected to the connecting hole 11, a retaining spring 3 is provided on the outer surface of the other rotating shaft 7, and the connecting hole 11 is connected to the other shaft groove 9.

[0022] The effect achieved by the entire embodiment 1 is that the two rotating shafts 7 and the rotating joint body 1 are both cut from free-cutting steel with good cutting performance and stable expansion coefficient. The two rotating shafts 7 are installed in the rotating joint body 1 along the bearing 2 in turn. One of the rotating shafts 7 can be limited and fixed by the retaining spring 3, and then the first pipe thread 4 is connected with the external blowing flip plate pipe thread, and the external vacuum hose connecting valve is threadedly connected in the through hole 6 and the second pipe thread 5. The valve body passes through the rotating shaft 7, and the vacuum hose intersects with the main surface of the blowing plate through the relevant through hole part of the rotating joint body 1. However, when the blowing flip plate rotates 0-90°, the rotating shaft 7 and the rotating body rotate around various connecting bodies as necessary. The rotation keeps the vacuum seal intact. The vacuum hose and the rotating joint body 1 passively accept the angle brought by the blowing plate, but at this time the vacuum hose will not be twisted, bent or deflated. At the same time, the rotating joint body 1 and the rotating shaft 7 can rotate relative to each other, and a bearing 2 and a sealing member 8 are installed in the middle, wherein the sealing member 8 ensures the sealing of the rotating shaft 7 and the rotating joint body 1, and the bearing 2 ensures the feasibility of 360° rotation between the two.

[0023] Embodiment 2, as Figure 1-Figure 4 As shown, the inner surface of the connecting hole 11 is matched with the outer surfaces of the two rotating shafts 7 , and the inner surfaces of the two sealing members 8 are fitted with the outer surfaces of the two rotating shafts 7 .

[0024] The effect achieved by the entire embodiment 2 is that both seals 8 are made of Teflon material. The low friction coefficient of Teflon makes the seals 8 have good wear resistance and high temperature stability, increases the stability of the seals 8 in use, and extends the service life of the seals 8.

[0025] Working principle: two rotating shafts 7 are installed in the rotating joint body 1 along the bearing 2 in sequence. One of the rotating shafts 7 can be limited and fixed by the retaining spring 3, and then the first pipe thread 4 is connected to the external blowing flip plate pipe thread, and the external vacuum hose connecting valve is threadedly connected in the through hole 6 and the second pipe thread 5. The valve body passes through the rotating shaft 7, and the vacuum hose intersects with the main surface of the blowing plate through the relevant through hole part of the rotating joint body 1. However, when the blowing flip plate rotates 0-90°, the rotating shaft 7 and the rotating body rotate around various connecting bodies as necessary. The rotation keeps the vacuum seal intact. The vacuum hose and the rotating joint body 1 passively accept the angle brought by the blowing plate, but at this time the vacuum hose will not twist, bend or deflate. At the same time, the rotating joint body 1 and the rotating shaft 7 can rotate relatively, and the bearing 2 and the seal 8 are installed in the middle. The seal 8 ensures the sealing of the rotating shaft 7 and the rotating joint body 1, and the bearing 2 ensures the feasibility of 360° rotation between the two. The seal 8 has good wear resistance and high temperature stability, which increases the stability of the seal 8 and extends the service life of the seal 8.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A vacuum rotary joint, characterized in that: include: A rotary joint body (1), wherein shaft grooves (9) are provided on the outer surfaces of both sides of the rotary joint body (1), a connecting hole (11) is provided on the inner wall of one side of one of the shaft grooves (9), sealing grooves (10) are symmetrically provided on the inner wall of the connecting hole (11), sealing members (8) are provided on the inner surfaces of the two sealing grooves (10), bearings (2) are provided on the inner surfaces of the two shaft grooves (9), rotating shafts (7) are provided on the inner surfaces of the two bearings (2), and a through hole (6) is provided on the top of the rotary joint body (1).

2. The vacuum rotary joint according to claim 1, characterized in that: The outer surface of one of the rotating shafts (7) is provided with a first pipe thread (4), and the inner surface of the through hole (6) is provided with a second pipe thread (5).

3. The vacuum rotary joint according to claim 2, characterized in that: The through hole (6) is connected to the connecting hole (11).

4. The vacuum rotary joint according to claim 3, characterized in that: The outer surface of the other rotating shaft (7) is provided with a retaining spring (3).

5. The vacuum rotary joint according to claim 4, characterized in that: The inner surface of the connecting hole (11) is matched with the outer surfaces of the two rotating shafts (7).

6. The vacuum rotary joint according to claim 5, characterized in that: The inner surfaces of the two sealing members (8) are arranged to fit the outer surfaces of the two rotating shafts (7), and the connecting hole (11) is arranged to communicate with the other shaft groove (9).

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