An irregular vacuum suction port structure and a vacuum suction port method

Abstract

The present application relates to a kind of special-shaped vacuum suction port structure and vacuum suction port method, structure includes suction port base, suction plug, sealing ring, suction port base connects suction valve and target container, suction plug is located in suction port base and is connected with connecting rod, connecting rod is from the end of suction valve, sealing ring is located between suction plug and suction port base, the upper surface edge of suction plug is equipped with special-shaped protrusion, special-shaped protrusion is asymmetric protrusion with one side being fold line and one side being smooth arc line;Suction port base is equipped with limit sheet, limit sheet is matched with the special-shaped protrusion of suction plug;The number of special-shaped protrusion is one or more, the number of limit sheet is consistent with the number of special-shaped protrusion.Compared with prior art, the present application has simple structure, high reliability, and easy operation, can effectively solve the problem that connecting rod and suction plug cannot be effectively installed or separated during vacuum treatment, thereby avoiding the risk of vacuum leakage caused by the remaining of connecting rod after the end of vacuum treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vacuum technology for superconducting power equipment, in particular to a special-shaped vacuum suction port structure and a vacuum suction port method. BACKGROUND

[0002] In the discipline of vacuum, the meaning of vacuum is the state of gas lower than one atmosphere pressure in a given space. People usually call this state of rarefied gas as vacuum state. Compared with the atmospheric state on which human beings depend, the specific vacuum state has the following characteristics:

[0003] (1) The gas pressure in vacuum state is less than one atmosphere pressure. Therefore, various vacuum containers on the earth surface will be subjected to the action of atmospheric pressure, and the size of the pressure difference is determined by the pressure difference between the inside and outside of the container. Since one atmosphere pressure on the earth surface is 101325 N / m2, when the pressure in the container is very small, the atmospheric pressure acting on the container can reach one atmosphere pressure.

[0004] (2) In vacuum state, due to the rarefaction of gas, the number of gas molecules per unit volume, i.e. the molecular density of gas, is less than the molecular density of gas under atmospheric pressure. Therefore, the number of collisions between molecules, between molecules and other particles (such as electrons, ions, etc.), and between molecules and various surfaces (such as walls) is relatively reduced, so that the molecular free path of the gas is increased.

[0005] (3) In vacuum state, due to the reduction of molecular density, the content of oxygen, hydrogen and other gases (including the content of water) as components of the atmosphere is also relatively reduced.

[0006] Therefore, in some cases where the content of impurities in materials or products needs to be reduced, or the effect of water needs to be removed, vacuum treatment is required for the production or manufacture of containers. In addition, in some cases where heat preservation is required, vacuum is also applied to achieve a certain degree of heat preservation by using vacuum heat conduction and heat convection. Different applications usually require different vacuum states.

[0007] The vacuum degree in the range of 10 3 Pa-10 5 Pa is called rough vacuum. At this time, compared with normal pressure, only the number of molecules is changed, and there is no change in the characteristics of gas molecules, and the collision frequency between molecules is high. Rough vacuum is usually required in vacuum suction, transportation of solids, liquids, colloids and particles, vacuum forming, vacuum filtration, vacuum impregnation, etc.

[0008] The vacuum degree in the range of 10 -1 Pa-10 3Pa range, the mutual collision between gas molecules and the collision between molecules and the wall of the container are not comparable, and the density of gas molecules is small. At this vacuum degree, the reduction of the density of gas molecules can not only realize non-oxidizing heating, but also realize vacuum insulation and insulation by using the gradual disappearance of gas heat conduction and heat convection with the reduction of gas pressure. At the same time, vacuum freezing and vacuum drying can also be realized by using the principle that the boiling point of liquid is reduced with the reduction of pressure. In the fields of vacuum melting, heat treatment, vacuum insulation, vacuum heat rolling and the like of ferrous metals, low vacuum is generally required.

[0009] The vacuum degree is 10 -3 Pa-10 -1 Pa range is called high vacuum, at which the mutual collision between molecules is very small, the collision between molecules and the wall of the container is very small, and the density of gas molecules is small. In this case, vacuum metallurgy and vacuum coating can be carried out by using the characteristics that the density of gas molecules is small and the chemical action between any substance and residual gas molecules is weak. In the fields of vacuum melting and refining of rare metals, ultra-pure metals and alloys, semiconductor materials, vacuum coating and ion implantation, high vacuum is generally required.

[0010] The vacuum degree is 10 -6 Pa-10 -3 Pa range is called ultra-high vacuum, at which the density of gas molecules is extremely low, the number of collisions with the wall is extremely small, and the time for the surface to form a monomolecular layer is increased. In the gaseous space, there are only atoms of the solid itself, and almost no other atoms or molecules exist. Therefore, by using the principles that the density of gas molecules is extremely low, the collision with the surface is extremely small, and the time for the surface to form a monomolecular layer is long, the research on surface physics and surface chemistry can be realized. This vacuum condition is generally required in the fields of controlled thermonuclear fusion, research on surface physics and surface chemistry, simulation of space environment, operation of large-scale synchrotron proton accelerators and the like.

[0011] In the application of superconducting technology, low-temperature cooling medium such as liquid helium and liquid nitrogen is generally required. The temperature difference between the low-temperature cooling medium and the normal temperature is at least 200 K. Therefore, for such a large temperature difference, the thermal insulation container needs to have good thermal insulation performance, that is, to reduce the heat leakage from the outside to the low-temperature medium as much as possible. The heat transfer mainly includes three modes: heat conduction, heat convection and heat radiation. In general, the thermal insulation container is composed of a multilayer thermal insulation layer composed of multiple layers of aluminum-coated film and non-woven fabric alternately and spaced, and vacuum to form a vacuum multilayer composite thermal insulation structure. The aluminum-coated film is used to block heat radiation, the non-woven fabric is used to block heat conduction, and the vacuum is used to block heat convection. As described above, in the case where vacuum insulation is required, the vacuum degree needs to reach low vacuum, that is, the vacuum degree is 10 -1 Pa-10 3Pa. But because the temperature difference between the refrigeration working medium and the normal temperature is too large in the application of superconducting technology, higher requirements are made on the vacuum degree, and the vacuum state needs to reach high vacuum, i.e. 10 -3 Pa-10 -1 Pa, and even less than 10 -3 Pa.

[0012] In order to make the target container reach the required vacuum degree, the target container needs to be vacuumized. At this time, a set of vacuum treatment system is usually needed. The simplest vacuum treatment system includes the container to be vacuumized (i.e. the target container), a vacuum gauge, a connecting pipeline, a vacuum valve, and a vacuum pump. Because the target container needs to be disconnected from the connecting pipeline, the vacuum valve, and the vacuum pump after reaching the target vacuum degree and completing the vacuum treatment, a vacuum port is usually used in the target container to achieve this function.

[0013] Generally, the structure of the vacuum port includes a vacuum port base, a port plug, and two sealing rings, and the vacuum port base includes a sealing flange and a base pipe. Generally, the vacuum port needs to be used in combination with a port valve. As shown, the port valve is composed of a tee, a connecting rod, and a sealing flange. The sealing flange and the flange structure on the tee are both KF flange structures, and the sealing flange is sealed with an O-ring in the middle of the tee, and the three are assembled together by a clamp. The straight pipe of the sealing flange is used to form a column seal with the connecting rod by using two sealing rings. This kind of dynamic seal structure of column seal is mainly used for sealing parts that need to move. The outer side of the connecting rod has a round handle at one end for controlling the connecting rod, and the other end has a thread that matches the thread hole of the port plug. In normal use, the connecting rod and the port plug are combined together by threads. Because the flange of the port base and the port valve are also KF flange structures, the two are also combined together by a clamp and an O-ring. During vacuumization, the port valve is first assembled with the vacuum port, and then the connecting pipeline is assembled with the port valve by a clamp and an O-ring. After the port valve is connected with the connecting pipeline and the vacuum port, the thread on the connecting rod is aligned with the thread hole of the port plug, and then the two are assembled together. After the connecting rod and the port plug are assembled, during the vacuum treatment of the target container, the vacuum pump is first turned on, and then the port plug placed in the port is pulled out by the connecting rod. In this way, the target container and the vacuum pump form a vacuumization channel through the connecting pipeline, and the vacuum pump is used to vacuumize the target container. After the target container reaches the target vacuum degree, the connecting rod is pushed in to make the port plug plug into the port base, and then the connecting rod is rotated to exit and separate from the port plug. Then the vacuum pump is stopped, the vacuumization is stopped, and the pipeline is removed.

[0014] From the above use mode, whether it is a connecting rod installation or removal, the connecting rod and the socket plug need to be assembled and fixed by threads. However, since the socket and the socket plug are both cylindrical or cylindrical trapezoidal. Therefore, in the process of installing or separating the connecting rod and the socket plug, only the friction between the plug and the socket base can be used to realize the installation or separation of the connecting rod and the socket plug. When the connecting rod and the socket plug are tightly matched, only the friction between the socket and the plug cannot realize the separation of the two, which will cause the connecting rod to remain on the socket plug, greatly increasing the risk of vacuum leakage. SUMMARY

[0015] The purpose of the present application is to overcome the defects of the prior art and provide an abnormal vacuum socket structure and a vacuum socket method that are tightly installed and smoothly separated.

[0016] The purpose of the present application can be achieved by the following technical solutions:

[0017] According to one aspect of the present application, an abnormal vacuum socket structure is provided, comprising a socket base, a socket plug, a sealing ring, the socket base connecting a socket valve and a target container, the socket plug being located in the socket base and connecting a connecting rod, the connecting rod passing out from one end of the socket valve, the sealing ring being located between the socket plug and the socket base, an abnormal protrusion being provided at the edge of the upper surface of the socket plug, the abnormal protrusion being an asymmetric protrusion with one side being a fold line and the other side being a smooth arc line.

[0018] A limiting piece is provided in the socket base, and the limiting piece cooperates with the abnormal protrusion of the socket plug; the number of abnormal protrusions is one or more, and the number of limiting pieces is consistent with the number of abnormal protrusions.

[0019] Further, the abnormal protrusion is in the shape of a typhoon, comprising a connecting portion, a smooth portion and a tip, the connecting portion, the tip and the smooth portion being connected in sequence at the edge of the upper surface of the socket plug, the connecting portion and the tip being connected by a fold line, and the outer diameter of the edge where the smooth portion is located being greater than the outer diameter of the edge where the connecting portion is located.

[0020] Further, the socket base is a stepped hole that penetrates up and down, the minimum diameter of the stepped hole being greater than the minimum outer diameter of the socket plug, and the maximum outer diameter of the socket plug being greater than the minimum diameter of the stepped hole.

[0021] Further, the length of the limiting piece is less than the difference between the inner diameter of the socket base and the outer diameter of the socket plug, the height of the limiting piece is less than the depth of the largest hole of the stepped hole of the socket base, and the height of the limiting piece is greater than the thickness of the abnormal protrusion on the socket plug.

[0022] Further, a chamfer is provided at the upper edge of the limiting piece, and the lower edge of the limiting piece is connected to the stepped surface of the stepped hole.

[0023] Further, a threaded hole is provided at the center of the upper surface of the socket plug, and the connecting rod is connected to the socket plug through the threaded hole.

[0024] Further, the lower surface of the irregular protrusion is a slope, and the thickness of the slope at the side of the fold line of the irregular protrusion is smaller than the thickness of the smooth arc side.

[0025] Further, the outer surface of the plug is provided with a plurality of sealing ring clamping grooves, and the sealing ring is located in the sealing ring clamping groove.

[0026] Further, the plug base is connected with the target container through welding, and the plug base is connected with the plug valve through flange.

[0027] According to another aspect of the present application, a vacuum plug method is provided, comprising the following steps:

[0028] The sealing ring is installed on the outer surface of the plug, and the plug is put into the plug base;

[0029] The vacuum pump and the evacuation valve are connected through the vacuum valve and the connecting pipeline, the plug valve is connected with the plug base, the rotation and movement of the plug in the plug base are limited by the limiting piece, and the connecting rod is connected with the plug base through the plug valve;

[0030] The connecting rod is pulled upward, the plug is moved upward and separated from the plug base through the connecting rod;

[0031] The vacuum pump is started, and the target container is subjected to vacuum treatment;

[0032] The plug is pushed to the plug base through the connecting rod until the plug enters the plug base, and when the plug is completely inserted into the plug base, the rotation and movement of the plug in the plug base are limited by the limiting piece, and the connecting rod is rotated to disconnect the connecting rod and the plug base;

[0033] The connection between the plug valve and the plug base is disconnected, and the connection between the plug base and the target container is reinforced.

[0034] Compared with the prior art, the present application has the following advantages:

[0035] 1、The upper surface of the plug is provided with an asymmetric irregular protrusion with one side being a fold line and the other side being a smooth arc, a limiting piece is arranged in the plug base, and the limiting piece cooperates with the irregular protrusion; when the connecting rod is screwed with the plug, the irregular protrusion interferes with the limiting piece, so that the rotation of the plug is limited, and the rotation speed or displacement deviation exists between the connecting rod and the plug, so that the reliable installation of the connecting rod and the plug is realized; when the connecting pipeline is removed, the connecting rod is rotated, and when it reaches a certain position, the irregular protrusion on the plug is blocked by the limiting piece on the plug base, the rotation of the plug is limited, and the plug cannot rotate with the connecting rod, so that the connecting rod can be easily separated from the plug.

[0036] 2、The lower part of the special-shaped protrusion is provided with a slope, when the suction plug is inserted into the suction base, if the special-shaped protrusion falls on the limiting piece of the suction base, the rotation of the suction plug and the movement to the suction base will be caused due to the existence of the slope, so that the complete installation of the suction plug and the suction base is realized, and the situation that the suction plug stops on the limiting piece of the suction base and is not completely installed is avoided.

[0037] 3、The vacuum suction method of the application adjusts the relative position of the suction plug and the suction base when the connecting rod and the suction plug are connected and disconnected, and the movement of the suction plug is constrained by the suction base, so that the deviation of the suction plug during connection and disconnection is avoided, the operation is simple, and the problem that the connecting rod and the suction plug cannot be effectively installed or separated during vacuum treatment is effectively solved, so that the risk of vacuum leakage caused by the remaining of the connecting rod after the vacuum treatment is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a schematic view of the cooperation of the suction base and the suction plug;

[0039] Figure 2 It is a schematic view of the cross section of the application;

[0040] Figure 3 It is a schematic view of the structure of the suction base;

[0041] Figure 4 It is a schematic view of the structure of the suction plug;

[0042] Figure 5 It is a schematic view of the structure of the suction plug Figure 2 ;

[0043] Figure 6 It is a front view of the suction plug;

[0044] Figure 7 It is a schematic view of the cooperation of the suction base and the suction plug Figure 2 ;

[0045] Figure 8 It is a schematic view of the cross section of the application Figure 2 ;

[0046] Figure 9 It is a schematic view of the structure of the application;

[0047] Figure 10 It is a schematic view of the application of the application;

[0048] Figure 11 It is a schematic view of the application of the application Figure 2 ;

[0049] Figure 12 It is a schematic view of the application of the application Figure 3 ;

[0050] Figure 13 Structure diagram of the present application Figure 2 ;

[0051] Figure 14 Structure diagram of the present application

[0052] In the figure, 1, mouth base, 11, limiting sheet, 2, mouth plug, 21, special-shaped protrusion, 211, connecting part, 212, smooth part, 213, sharp end, 3, sealing ring, 4, connecting rod, 5, vacuum gauge, 6, connecting pipeline, 7, vacuum valve, 8, vacuum pump, 9, mouth valve, 10, target container. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the present application.

[0054] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0055] In the description of the present application, it should be noted that the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0056] Embodiment 1

[0057] The present application provides a special-shaped vacuum mouth structure, which comprises a mouth base 1, a mouth plug 2, and a sealing ring 3, as shown in Figure 1 and Figure 2 . Among them, the mouth base 1 is the assembly base of the mouth plug 2, which is welded on the target container 10 which needs to be vacuum treated. As shown in Figure 3As shown, the two position symmetrical limiting pieces 11 on the suction base 1, the width and height of the limiting pieces 11 can be designed according to specific needs. The flange of the suction base 1 and the suction valve 9 are KF flange structure, the length of the limiting piece 11 is less than the radius difference between the suction port and the inner diameter of the external KF flange, so as to ensure that the limiting piece 11 does not interfere with the insertion or pulling of the suction plug 2. The height of the limiting piece 11 is less than the height difference between the suction port and the external KF flange, and higher than the thickness of the special-shaped protrusion 21 on the suction plug 2, so as to ensure that the limiting piece 11 can limit the rotation of the suction plug 2 when the connecting rod 4 is rotated in or out. In order to avoid the edge of the limiting piece 11 scratching the sealing ring 3 and causing damage to the sealing ring 3, affecting the effect of the cylindrical seal, the edge of the limiting piece 11 should be chamfered. In addition, the number of limiting pieces 11 on the suction base 1 can be changed, there can be multiple limiting pieces 11, and at least one is needed. In the case of designing multiple limiting pieces 11, it needs to be determined according to the design of the special-shaped protrusion 21 of the suction plug 2, to avoid the situation that the suction plug 2 cannot be completely inserted due to the mutual interference of the limiting piece 11 and the special-shaped protrusion 21.

[0058] The structure diagram of the suction plug 2 is shown in Figure 4 There is a set of symmetrical special-shaped protrusions 21 on the upper part of the suction plug 2. The special-shaped protrusion 21 is similar to a "typhoon", one side is a fold line, and the other side is a smooth arc line. The maximum length of the special-shaped protrusion 21 of the suction plug 2 is less than the inner diameter of the external KF flange, and at the same time is greater than the inner diameter of the limiting piece 11 on the suction base 1, so as to ensure that when the suction plug 2 is in the completely inserted state, the special-shaped protrusion 21 can interfere with the limiting piece 11 on the suction base 1, as shown in Figure 5 and Figure 6 In addition, the lower part of the special-shaped protrusion 21 has a slope. The role of the slope is that when the suction plug 2 is inserted into the suction base 1, if the special-shaped protrusion 21 falls on the limiting piece 11 of the suction base 1, due to the existence of the slope, the suction plug 2 will rotate and continue to move towards the suction base 1. Thus, the complete installation of the suction plug 2 and the suction base 1 is realized, avoiding the situation that the suction plug 2 stops on the limiting piece 11 of the suction base 1 without complete installation.

[0059] As a preferred embodiment, the special-shaped protrusion 21 includes a connecting part 211, a smooth part 212 and a tip 213, the connecting part 211, the tip 213 and the smooth part 212 are connected in sequence at the edge of the upper surface of the suction plug, and the connecting part 211 and the tip 213 are connected by a fold line, and the outer diameter of the edge where the smooth part 212 is located is greater than the outer diameter of the edge where the connecting part 211 is located.

[0060] The lower part of the spout plug 2 has two recesses for installing the sealing ring 3. The lower part of the spout plug 2 is a normal axisymmetric cylindrical structure, so that when the spout plug 2 is completely installed, the sealing ring 3 can be uniformly extruded. The sealing ring 3 is selected according to actual use requirements, and a sealing ring 3 with appropriate wire diameter and outer diameter is installed on the spout plug 2. The sealing ring 3 can be made of different materials according to actual use, such as silicone, nitrile or fluororubber, etc. The spout plug 2 with the installed sealing ring 3 is placed in the spout base 1. At this time, the spout plug 2 is used to realize the separation of the internal vacuum environment of the container and the external environment, and the sealing ring 3 is uniformly extruded by the pressure difference between the inside and outside of the spout plug 2, realizing reliable cylindrical vacuum sealing.

[0061] When normal use requires vacuumizing the target cavity, the spout valve 9 is first installed on the flange of the spout base 1 of the present application. Then, the threaded rod 4 on the spout valve 9 is screwed into the threaded hole on the spout plug 2, realizing the threaded assembly connection of the threaded rod 4 and the spout plug 2. When the threaded rod 4 is screwed into the spout plug 2, the special-shaped protrusion 21 of the spout plug 2 interferes with the limiting piece 11 on the spout base 1. When the threaded rod 4 is screwed into the spout plug 2, the rotation of the spout plug 2 is limited to a certain extent, so that the rotational movement speed or displacement between the threaded rod 4 and the spout plug 2 is deviated, thereby realizing the reliable installation of the threaded rod 4 and the spout plug 2. After the threaded rod 4 and the spout plug 2 are assembled, the spout plug 2 can be separated from the spout base 1 by pulling the threaded rod 4 upwards, and the target container 10 can be vacuumized by using the vacuum pump 8. Two sealing rings 3 are installed on the spout plug 2 to realize cylindrical sealing.

[0062] After the vacuum treatment is finished, the nozzle plug 2 is pushed towards the nozzle base 1 by the connecting rod 4, and moves towards the nozzle base 1 until the nozzle plug 2 is inserted into the nozzle base 1. At this time, the special-shaped protrusion 21 on the nozzle plug 2 can be on the limiting piece 11 of the nozzle base 1. However, the lower part of the special-shaped protrusion 21 on the nozzle plug 2 has a slope that prevents the special-shaped protrusion 21 from being stopped on the limiting piece 11 of the nozzle base 1. Therefore, if the special-shaped protrusion 21 on the nozzle plug 2 falls on the limiting piece 11 of the nozzle base 1, the slope will make the nozzle plug 2 slide off the limiting piece 11 of the nozzle base 1. After the nozzle plug 2 slides off the limiting piece 11 of the nozzle base 1, the nozzle plug 2 continues to move towards the nozzle base 1 until the nozzle plug 2 is completely inserted into the nozzle base 1. At this time, the sealing ring 3 is uniformly pressed, thereby achieving a reliable cylindrical vacuum seal. After the nozzle plug 2 is completely installed in the nozzle base 1, the connecting rod 4 is rotated to separate the connecting rod 4 from the nozzle plug 2. During the rotation, when reaching a certain position, the protrusion on the special-shaped protrusion 21 of the nozzle plug 2 is blocked by the limiting piece of the nozzle base 1, and the rotation of the nozzle plug 2 is limited, so that it cannot rotate together with the connecting rod 4, and thus the connecting rod 4 can be easily separated from the nozzle plug 2. Subsequently, the clamp is loosened, the nozzle valve 9 on the flange of the nozzle base 1 is removed, and the flange cover plate is placed on the nozzle base 1 and fixed by the clamp to prevent external force from causing the nozzle plug 2 to loosen, and the vacuum treatment of the target container 10 is completed.

[0063] Example 2

[0064] The present application can be applied in the field requiring vacuum treatment. One of the application fields is the application of superconducting power equipment, such as superconducting motors, superconducting cables, superconducting reactors, superconducting magnets, etc. One application example of the present application is shown in the schematic diagram of Figures 7-9 Based on Example 1, the present application is applied to a high-temperature superconducting wind turbine. Since the superconducting components in the high-temperature superconducting wind turbine are made of high-temperature superconducting materials, the superconducting components need to be soaked in liquid nitrogen. At the same time, a double-layer container with multiple composite insulation layers and a vacuum interlayer is needed to ensure the state of the liquid nitrogen, as shown in Figures 10-12 .

[0065] The present application is welded on the outer cylinder wall of the high-temperature superconducting wind turbine. Before the vacuum treatment, the vacuum valve 7 shown in Figure 13 is installed on the flange of the nozzle base 1 of the present application. Subsequently, according to the schematic diagram of Figure 14 , the vacuum gauge 5, the target container 10, the nozzle valve 9, the connecting pipeline 6, the vacuum valve 7, and the vacuum pump 8 are connected together to form a vacuum treatment system.

[0066] As a preferred embodiment, the spout base 1 can adopt materials with good structural strength and welding performance, such as stainless steel, aluminum, etc.; the spout plug 2 can adopt materials with good mechanical strength, such as stainless steel, aluminum, etc., and the material can be changed according to actual requirements.

[0067] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A special-shaped vacuum suction port structure, comprising a suction port base (1), a suction port plug (2) and a sealing ring (3), the suction port base (1) is connected with a suction port valve (9) and a target container (10), the suction port plug (2) is located in the suction port base (1) and is connected with a connecting rod (4), the connecting rod (4) passes out from one end of the suction port valve (9), and the sealing ring (3) is located between the suction port plug (2) and the suction port base (1), characterized in that, The upper surface edge of the plug (2) is provided with a special-shaped protrusion (21), which is an asymmetric protrusion with a fold line on one side and a smooth arc line on the other side. The plug base (1) is provided with a limiting sheet (11) which cooperates with the special-shaped protrusion (21) of the plug (2); the number of the special-shaped protrusions (21) is one or more, and the number of the limiting sheets (11) is consistent with that of the special-shaped protrusions (21).

2. The shaped vacuum port structure of claim 1, wherein, The special-shaped protrusion (21) is in the shape of a typhoon, including a connecting part (211), a smooth part (212) and a tip (213), which are sequentially connected at the upper surface edge of the plug (2); the connecting part (211) and the tip (213) are connected by a fold line, and the outer diameter of the edge where the smooth part (212) is located is greater than that of the edge where the connecting part (211) is located.

3. The shaped vacuum port structure of claim 1, wherein, The plug base (1) is provided with a through stepped hole, the minimum diameter of the stepped hole is greater than the minimum outer diameter of the plug (2), and the maximum outer diameter of the plug (2) is greater than the minimum diameter of the stepped hole.

4. The shaped vacuum port structure of claim 3, wherein, The length of the limiting sheet (11) is less than the difference between the radius of the inner diameter of the plug base (1) and the outer diameter of the plug (2), the height of the limiting sheet (11) is less than the depth of the largest hole of the stepped hole of the plug base (1), and the height of the limiting sheet (11) is greater than the thickness of the special-shaped protrusion (21) on the plug (2).

5. The shaped vacuum port structure of claim 3, wherein, The upper edge of the limiting sheet (11) is provided with a chamfer, and the lower edge of the limiting sheet (11) is connected to the stepped surface of the stepped hole.

6. The shaped vacuum port structure of claim 1, wherein, The upper surface of the plug (2) is provided with a threaded hole, and the connecting rod (4) is connected to the plug (2) through the threaded hole.

7. The shaped vacuum port structure of claim 1, wherein, The lower surface of the special-shaped protrusion (21) is a slope, and the thickness of the slope on the fold line side of the special-shaped protrusion (21) is less than that on the smooth arc line side.

8. The shaped vacuum port structure of claim 1, wherein, The outer surface of the plug (2) is provided with a plurality of sealing ring clamping grooves, and the sealing ring (3) is located in the sealing ring clamping grooves.

9. The shaped vacuum port structure of claim 1, wherein, The plug base (1) is connected to the target container by welding, and is connected to the plug valve by flange.

10. A vacuum suction method of the irregular vacuum suction port structure according to any one of claims 1 to 9, characterized by, The method comprises the following steps: Install the sealing ring (3) on the outer surface of the plug (2), and place the plug (2) in the plug base (1); Connect the vacuum pump (8) and the evacuation valve (9) through the vacuum valve (7) and the connecting pipeline (6), connect the plug valve (9) to the plug base (1), limit the rotation and movement of the plug (2) in the plug base (1) through the limiting sheet (11), and pass the connecting rod (4) through the plug valve (9) and connect it to the plug base (1); Pull the connecting rod (4) upwards, drive the plug (2) to move upwards and separate from the plug base (1) through the connecting rod (4); Start the vacuum pump (8) to perform vacuum treatment on the target container (10); By pushing the suction plug (2) to the direction of the suction base (1) through the connecting rod (4), until the suction plug (2) enters the suction base (1), when the suction plug (2) is fully inserted into the suction base (1), the rotation and movement of the suction plug (2) in the suction base (1) is limited by the limiting piece (11), and the connecting rod (4) is rotated to release the connection between the connecting rod (4) and the suction base (1); The connection between the suction valve (9) and the suction base (1) is released, and the connection between the suction base (1) and the target container (10) is reinforced.

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