CN115789371A - Auxiliary fixing device for the installation of metal sealing rings for negative pressure equipment - Google Patents

Abstract

The invention provides an auxiliary fixing device for the installation of metal sealing rings of negative pressure equipment, comprising: two sealing ring fixing components, both of which are semi-hollow cylinders, the sides of the two semi-hollow cylinders are butted to form a whole hollow cylinder, each half-hollow cylinder The upper end surface of the core cylinder is provided with a radially inward protruding part, and the end of the protruding part is provided with a recessed fixing groove for fixing the metal sealing ring. The thickness of the fixing groove is the same as that of the metal sealing ring; the hook device, Arranged along the upper end face of the sealing ring fixing component and the lower end face, the claw device includes a shell, a spring and a grapple. The shell is fixed on the outer edge of the sealing ring fixing component and a through hole is opened in the middle, and the grapple is sleeved in the through hole and connected with the There is a gap between the inner walls of the shell, and the spring is arranged in the gap to provide a gripping force, so that the grabbing hook stretches up and down along the inner wall of the shell; The hook body is used to hook the bottom end face of the ultra-high vacuum flange.

Description

Auxiliary fixing device for the installation of metal sealing rings for negative pressure equipment

technical field

The invention relates to the technical field of vacuum equipment, in particular to an auxiliary fixing device for installing a metal sealing ring of negative pressure equipment.

Background technique

At present, for my country's first carbon ion therapy equipment with independent intellectual property rights, its main part includes an isochronous cyclotron injector, a synchrotron with acceleration energy up to 400MeV and 5 treatment terminals. It includes many vacuum chambers, vacuum insertion equipment, welded bellows, etc., and these connections need to be sealed by sealing rings.

The metal sealing ring of the vacuum flange is a necessary condition for obtaining ultra-high vacuum, so the installation efficiency and quality of the vacuum sealing ring will greatly affect the installation efficiency of the overall equipment, reducing the repeated work in the subsequent vacuum leak detection process. In the current installation process, due to the compact installation space and the limitation of the quality and volume of the vacuum chamber, especially when the end face of the sealing flange of the chamber is perpendicular to the ground, it is necessary to align the screw hole position of the sealing flange, or to adjust the vacuum chamber Due to the angle adjustment of the bolt hole and the change of the position of the chamber or the insert, the metal sealing ring originally pre-placed on the edge of the flange will fall. Once the metal sealing ring falls, the previous work will be damaged. All have to do it all over again. Even, the above situation occurs more than once in the same installation location, so the requirements for the installers are quite high.

During the installation process, in order to prevent the sealing ring from falling, non-woven cloth or clean gloves are usually used to stabilize the sealing ring. This will not only cause the risk of injury to the staff or contamination of the metal sealing ring, but also in the two relative methods. When the sealing surface of the flange is attached, as the gap becomes smaller, the operation of righting and stabilizing cannot guarantee the stability of the small gap of the sealing ring. Moreover, during the installation process, due to the falling of the sealing ring due to collision and vibration during alignment, the edge of the flange loses its buffer, which easily leads to collision of the edge of the flange, thus causing damage to the edge of the flange, and the damaged flange together with the section of the chamber It will not be possible to provide an ultra-high vacuum environment, resulting in a great waste of time and economic costs.

Contents of the invention

In view of the above problems, the present invention provides an auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment, so as to protect the knife edge of the vacuum flange and the metal sealing ring to be installed in place at one time.

In order to achieve the above purpose, the present invention provides an auxiliary fixing device for the installation of metal sealing rings of negative pressure equipment, including: two sealing ring fixing components, both of which are semi-hollow cylinders, and the sides of the two semi-hollow cylinders are butted The entire hollow cylinder is formed, and the upper end surface of each semi-hollow cylinder is provided with a radially inward protruding part, and the end of the protruding part is provided with a concave fixing groove for fixing the metal sealing ring. The thickness of the fixing groove is the same as that of the metal seal ring; the claw device is arranged along the upper end face of the seal ring fixing assembly and the lower end face, and the claw device includes a shell, a spring and a grab hook, and the shell is fixed on the seal ring The outer edge and the middle part of the fixed component are provided with a through hole, the grapple is sleeved in the through hole and there is a gap between the inner wall of the housing, and the spring is arranged in the gap for providing The gripping force makes the grapple stretch up and down along the inner wall of the housing; the bottom of the grapple protrudes from the bottom of the housing, and the protruding part is provided with a protruding hook body for hooking the ultra-high vacuum Bottom face of the flange.

Optionally, the sealing ring fixing component is made of composite material.

Optionally, the nominal diameter of the ultra-high vacuum flange is 16mm-250mm, and the basic size of the metal sealing ring is 21.4mm-273.1mm.

Optionally, there are at least three protruding parts; in each sealing ring fixing assembly, the semi-hollow cylinder and the protruding parts are integrally formed.

Optionally, the grapple includes a first cylinder, a second cylinder and a hook body in sequence from top to bottom, wherein: the first cylinder fits on the inner wall of the through hole, and the second cylinder The diameter is smaller than the first cylinder so that there is a gap between the second cylinder and the inner wall of the housing, the bottom of the second cylinder protrudes from the bottom end of the housing, and the bottom of the second cylinder The hook body is convexly provided.

Optionally, there are multiple claw devices and they are evenly distributed on the outer edges of the two sealing ring fixing assemblies 1 .

Optionally, the thickness of the fixing groove is 2±0.5mm.

Optionally, when the sides of the two semi-hollow cylinders are butted, one end of the butt joint is fixed by a connecting hinge, and the other end of the butt joint is fastened by a buckle.

Optionally, the buckle includes a female buckle and a sub-buckle, the female buckle is fixedly arranged on the outer edge of the sealing ring fixing component, and the sub-buckle is movably connected to the outer edge of the sealing ring fixing component.

Compared with the prior art, the auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment provided by the present invention has at least the following beneficial effects:

(1) The invention can protect the knife edge of the vacuum flange and the metal sealing ring can be installed in place at one time, can meet the corresponding size of the standard parts of the ultra-high vacuum flange, and can even meet the installation requirements of the sealing ring of some special-shaped knife edge flanges;

(2) The metal sealing ring can be fixed to the knife-edge position of the vacuum flange with a certain pre-tightening force, which solves the problem of mechanical vibration caused by alignment, bolt installation and other operations during installation, and can ensure that the metal sealing ring maintains a relative position, In this way, the sealing ring is prevented from falling; and, even if the flanges collide with each other during the installation process, the damage of the knife edge can be avoided to the greatest extent.

(3) Since the auxiliary fixing device does not require the installer to manually intervene on the metal sealing ring during installation, it can well avoid the additional righting operation required by the installer during installation, especially during the sealing surface bonding stage, effectively The operator can be protected from the pinch injury of the opponent.

Description of drawings

Through the following description of the embodiments of the present invention with reference to the accompanying drawings, the above-mentioned and other objects, features and advantages of the present invention will be more clear, in the accompanying drawings:

Fig. 1 schematically shows a top view and a front view of an auxiliary fixing device for installing a metal sealing ring of a negative pressure device according to an embodiment of the present invention;

Fig. 2 schematically shows a three-dimensional effect diagram of an auxiliary fixing device for installing a metal sealing ring of a negative pressure device according to an embodiment of the present invention;

Fig. 3 schematically shows a partially enlarged view of a fixing groove according to an embodiment of the present invention;

Fig. 4 schematically shows three views of a hook device according to an embodiment of the present invention;

Fig. 5 schematically shows a partially enlarged view of a buckle according to an embodiment of the present invention;

Fig. 6 schematically shows a partially enlarged view of a connecting leaflet according to an embodiment of the present invention;

Fig. 7 schematically shows an application scene diagram of an auxiliary fixing device for installing a metal sealing ring of a negative pressure device according to an embodiment of the present invention;

Fig. 8 schematically shows a partial enlarged view of part A in Fig. 7;

Fig. 9 schematically shows a partial enlarged view of the knife-edge extruded metal sealing ring of the ultra-high vacuum flange in Fig. 7 .

[Description of Reference Signs]

1-sealing ring fixing assembly; 2-connecting loose leaf; 3-claw device; 4-buckle; 5-intrusion parts; 6-grabbing hook; 7-spring;

10-Auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment;

20-ultra-high vacuum flange at the fixed end; 30-ultra-high vacuum flange at the installation end;

40-Metal sealing ring that needs to be fixed; 21-Knife edge of ultra-high vacuum flange;

50-the vacuum pipe at the fixed end; 60-the vacuum pipe at the installation end.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the invention. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features, steps, operations and/or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

All terms (including technical and scientific terms) used herein have the meaning commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have a meaning consistent with the context of this specification, and not be interpreted in an idealized or overly rigid manner.

Fig. 1 schematically shows a top view and a front view of an auxiliary fixing device for installing a metal sealing ring of a negative pressure device according to an embodiment of the present invention. Fig. 2 schematically shows a three-dimensional rendering of an auxiliary fixing device for installing a metal sealing ring of a negative pressure device according to an embodiment of the present invention. Fig. 3 schematically shows a partially enlarged view of a fixing groove according to an embodiment of the present invention.

As shown in Figures 1 to 3, the embodiment of the present invention provides an auxiliary fixing device for the installation of metal sealing rings in negative pressure equipment, including: two sealing ring fixing components 1, both of which are semi-hollow cylinders, and two semi-hollow The sides of the central cylinder are butted to form a whole hollow cylinder, and the upper end surface of each semi-hollow cylinder is provided with a radially inward protruding part 5, and the end of the protruding part 5 is provided with a recessed fixing groove 9 for fixing the metal seal ring, the fixing groove 9 has the same thickness as the metal sealing ring; the claw device 3 is arranged along the upper end face of the sealing ring fixing assembly 1 and the lower end face, the claw device 3 includes a shell 8, a spring 7 and a grabbing hook 6, and the shell 8 is fixed on The outer edge and the middle part of the sealing ring fixing assembly 1 are provided with a through hole, the grab hook 6 is sleeved in the through hole and there is a gap between the inner wall of the housing 8, and the spring 7 is arranged in the gap to provide a gripping force, so that The grapple 6 stretches up and down along the inner wall of the shell 8; the bottom of the grapple 6 protrudes from the bottom of the shell 8, and the protruding part is provided with a protruding hook body for hooking the bottom end surface of the ultra-high vacuum flange.

Through the above structure, a retractable claw device is provided, which solves the problem of difficult operation during use. A fixing groove matching the edge thickness of the metal sealing ring is provided so that the metal sealing ring is not easy to fall off. Furthermore, the auxiliary fixing device can fix the metal sealing ring on the knife-edge position of the vacuum flange with a certain pre-tightening force, which solves the problem of mechanical vibration caused by operations such as alignment and bolt installation during installation, and can ensure that the metal sealing ring remains Relative position, so as to avoid the sealing ring from falling.

Moreover, since the auxiliary fixing device does not require the installer to manually intervene on the metal sealing ring during installation, it can well avoid the additional uprighting operation required by the installer during installation, especially during the sealing surface bonding stage, effectively Protect the operator from being pinched by the opponent.

In the embodiment of the present invention, the sealing ring fixing component 1 is made of composite material. As a result, the overall weight of the device is reduced through the use of new composite materials.

In the embodiment of the present invention, the nominal diameter of the ultra-high vacuum flange is 16 mm to 250 mm, and the basic size of the metal sealing ring is 21.4 mm to 273.1 mm. The thickness of the fixing groove 9 is 2±0.5mm.

Specifically, the ultra-high vacuum flange can refer to the flange size and metal sealing ring size in the "GB/T6071-2003 Ultra-High Vacuum Flange" standard. It has six sizes of CF16-CF250, and the size coverage ranges from DN16 to DN250.

Through the above structure, the auxiliary fixing device can meet the corresponding dimensions of the standard parts of ultra-high vacuum flanges, and can be applied to the auxiliary fixing of metal sealing rings in a full range of ultra-high vacuum flanges, and can even meet the requirements of sealing rings of some special-shaped knife-edge flanges. Installation requirements.

In the embodiment of the present invention, there are at least three protruding parts 5; in each sealing ring fixing assembly 1, a semi-hollow cylinder and protruding parts 5 are integrally formed.

Through the above structure, even if an accident of flange collision occurs during the installation process, damage to the knife edge can be avoided to the greatest extent.

Fig. 4 schematically shows three views of a hook device according to an embodiment of the present invention.

As shown in Figure 4, in the embodiment of the present invention, the grapple 6 includes a first cylinder, a second cylinder and a hook from top to bottom, the first cylinder is attached to the inner wall of the through hole, and the outer diameter of the second cylinder is Smaller than the first cylinder so that there is a gap between the second cylinder and the inner wall of the shell 8, the bottom of the second cylinder protrudes from the bottom of the shell 8, and a hook is protruded from the bottom of the second cylinder.

In the embodiment of the present invention, there are multiple claw devices 3 that are evenly distributed on the outer edges of the two sealing ring fixing components 1 .

Fig. 5 schematically shows a partial enlarged view of the buckle according to the embodiment of the present invention. Fig. 6 schematically shows a partially enlarged view of a connecting hinge according to an embodiment of the present invention.

Please refer to FIG. 5 and FIG. 6 , in the embodiment of the present invention, when the sides of two semi-hollow cylinders are butted, one end of the butt joint is fixed by the connecting hinge 2 , and the other end of the butt joint is fastened by the buckle 4 .

Exemplarily, the buckle 4 may include a female buckle and a sub-buckle, the female buckle is fixedly arranged on the outer edge of the sealing ring fixing assembly 1 , and the sub-buckle is movably connected to the outer edge of the sealing ring fixing assembly 1 .

Fig. 7 schematically shows an application scene diagram of an auxiliary fixing device for installing a metal sealing ring of a negative pressure device according to an embodiment of the present invention. FIG. 8 schematically shows a partially enlarged view of part A in FIG. 7 . Fig. 9 schematically shows a partial enlarged view of the knife-edge extruded metal sealing ring of the ultra-high vacuum flange in Fig. 7 .

Please refer to FIG. 7 , based on the structure disclosed above, the auxiliary fixing device 10 for installing the metal sealing ring of the negative pressure equipment can be applied in the installation process of the metal sealing ring of the negative pressure equipment. Among them, the upper end surface and the lower end surface of the protruding part in the auxiliary fixing device 10 abut against the inner side of the ultra-high vacuum flange 20 at the fixed end and the ultra-high vacuum flange 30 at the installation end respectively, and the ultra-high vacuum flange 20 is far away from the auxiliary The end face of the fixing device 10 is connected with a fixed-end vacuum pipe 50 , and the end face of the ultra-high vacuum flange 30 away from the auxiliary fixing device 10 is connected with a vacuum pipe 60 at the installation end. In the claw device of the auxiliary fixing device 10 , the bottom of the grapple protrudes from the bottom end of the shell, and the protruding part is provided with a protruding hook body, which can hook the bottom end surface of the ultra-high vacuum flange 20 .

Please refer to FIG. 8 , the metal sealing ring 40 to be installed is clamped in the recessed fixing groove provided at the end of the protruding part of the auxiliary fixing device 10 .

Please refer to FIG. 9 , under the action of the bolt pre-tightening force, the knife edge 21 of the ultra-high vacuum flange 20 is easy to squeeze the metal sealing ring 40, deforming the metal sealing ring 40, thereby forming a line seal and achieving a sealing effect.

With reference to Figures 7-9, the auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment provided by the embodiment of the present invention, its use method can refer to the following steps, for example:

(1) Place the metal sealing ring 40 on the knife edge 21 of the ultra-high vacuum flange;

(2) Use the auxiliary fixing device 10 to fix the fixing groove and the outer edge of the metal sealing ring 40;

(3) Pull the hook device so that it hooks the bottom end face of the ultra-high vacuum flange 20;

(4) Close the female button and the child button to realize the auxiliary fixing of the metal sealing ring 40;

(5) Install equipment or pipelines 50 and 60;

(6) Open the female buckle and the sub buckle, remove the auxiliary fixing device 10, and complete the installation of equipment or pipelines 50, 60.

The above is just an illustration, and the embodiment of the present invention is not limited thereto. For example, in some embodiments, the material of the sealing ring fixing component, the material of the spring, and the size of the fixing groove opened on the sealing ring fixing component can all be reasonably selected or set according to actual needs, which are not limited in the present invention. For another example, in some other embodiments, the fixing groove provided on the sealing ring fixing component may adopt a multi-section method, and the specific cross-sectional structural shape is not limited in the present invention.

From the above description, it can be seen that the above-mentioned embodiments of the present invention at least achieve the following technical effects:

(1) The use of this device has eliminated the influence of mechanical vibration during the installation of negative pressure device equipment and pipelines;

(2) It avoids the danger caused by the installer manually interfering with the position of the sealing ring during the installation of the negative pressure equipment, and largely guarantees the safety of the installation;

(3) Various operations caused by calibrating the position of the metal sealing ring during the installation process are avoided, which greatly saves installation time;

(4) Reduce or even eliminate the possibility of the metal sealing ring falling, thereby fully ensuring the integrity of the flange edge.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right" etc. are based on those shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. Throughout the drawings, the same elements are indicated by the same or similar reference numerals. Conventional structures or constructions will be omitted when it may obscure the understanding of the present invention. And the shape, size, and positional relationship of each component in the figure do not reflect the actual size, proportion and actual positional relationship.

Similarly, in the above description of exemplary embodiments of the invention, in order to streamline the invention and to facilitate understanding of one or more of the various disclosed aspects, various features of the invention are sometimes grouped together into a single embodiment, figure, or in description. Description of the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or examples includes In at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. Furthermore, the word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The expressions "about", "approximately", "substantially" and "approximately" mean within 10%, preferably within 5%, unless otherwise stated.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. The utility model provides an auxiliary fixture for installation of negative pressure equipment metal seal circle which characterized in that includes:

the sealing ring fixing assemblies (1) are both semi-hollow cylinders, the side surfaces of the two semi-hollow cylinders are butted to form the whole hollow cylinder, an inward extending part (5) in the radial direction is arranged on the upper end surface of each semi-hollow cylinder, a sunken fixing groove (9) is arranged at the end part of each extending part (5) and used for fixing a metal sealing ring, and the thickness of each fixing groove (9) is the same as that of the metal sealing ring;

the claw device (3) is arranged along the lower end face of the upper end face of the sealing ring fixing component (1), the claw device (3) comprises a shell (8), a spring (7) and a grapple (6), the shell (8) is fixed on the outer edge of the sealing ring fixing component (1), a through hole is formed in the middle of the shell, the grapple (6) is sleeved in the through hole, a gap is reserved between the grapple and the inner wall of the shell (8), and the spring (7) is arranged in the gap and used for providing a grappling force to enable the grapple (6) to stretch up and down along the inner wall of the shell (8);

the bottom of the grapple (6) extends out of the bottom end of the shell (8), and the extending part is provided with a convex hook body used for hooking the bottom end surface of the ultrahigh vacuum flange.

2. The auxiliary fixing device for installing the metal sealing ring of the negative pressure equipment is characterized in that the sealing ring fixing component (1) is made of composite materials.

3. The auxiliary fixing device for installing the metal sealing ring of the negative pressure equipment as claimed in claim 1, wherein the nominal diameter of the ultra-high vacuum flange is 16mm to 250mm, and the basic size of the metal sealing ring is 21.4mm to 273.1mm.

4. The auxiliary fixture for the installation of a metal seal ring of a negative pressure equipment according to claim 1, characterized in that the number of the protruding parts (5) is at least three;

in each seal ring fixing assembly (1), the semi-hollow cylinder and the protruding part (5) are integrally formed.

5. The auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment according to claim 1, characterized in that the grapple (6) comprises a first cylinder, a second cylinder and a hook body from top to bottom, wherein:

the first cylinder fits the inner wall of the through hole, the outer diameter of the second cylinder is smaller than that of the first cylinder, so that a gap is reserved between the second cylinder and the inner wall of the shell (8), the bottom of the second cylinder extends out of the bottom end of the shell (8), and the hook body is convexly arranged at the bottom of the second cylinder.

6. The auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment is characterized in that the hook claw devices (3) are distributed on the outer side edges of the two sealing ring fixing components (1) uniformly.

7. The auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment as claimed in claim 1, wherein the thickness of the fixing groove (9) is 2 ± 0.5mm.

8. The auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment is characterized in that when the side surfaces of the two semi-hollow cylinders are butted, one butted end is fixed through a connecting hinge (2), and the other butted end is fastened through a buckle (4).

9. The auxiliary fixing device for the installation of the metal sealing ring of the negative pressure equipment as claimed in claim 8, wherein the buckle (4) comprises a female buckle and a male buckle, the female buckle is fixedly arranged at the outer side edge of the sealing ring fixing component (1), and the male buckle is movably connected to the outer side edge of the sealing ring fixing component (1).

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