CN216950739U

CN216950739U - Vacuum degree maintaining device

Info

Publication number: CN216950739U
Application number: CN202220472982.4U
Authority: CN
Inventors: 段镇企
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-12
Anticipated expiration: 2032-03-04

Abstract

The utility model discloses a vacuum degree maintaining device, comprising: ultra-low temperature mounting panel, shell, adsorbing material, toast temperature regulating device set up the inner chamber in the shell, and adsorbing material sets up in the inner chamber, and the top of shell sets up the induction port with the inner chamber intercommunication, toasts temperature regulating device and sets up in the bottom of shell, and the shell is connected with the ultra-low temperature mounting panel. The vacuum degree maintaining device provided by the application utilizes the super strong adsorption capacity of the adsorption material to manufacture the self-adsorption pump without electric power and other energy sources, and the adsorption pump does not have any vibration, noise or other interference possibly brought to the experiment when working. Meanwhile, the device has simple structure and flexible and convenient installation and use.

Description

Vacuum degree maintaining device

Technical Field

The utility model relates to the technical field of low-temperature vacuum instruments and equipment, in particular to a vacuum degree maintaining device.

Background

In the field of industrial and scientific experiments, a cavity or a vacuum container with a certain vacuum degree is often used, a vacuum pump is needed to vacuumize the vacuum cavity or the vacuum container, but when the vacuum cavity is used for experiments, the operation of the vacuum pump can influence the experiments, so that the vacuum suction pump can stop working after the vacuum cavity is pumped to the required vacuum degree. The vacuum level within the vacuum chamber is then maintained for a period of time sufficient to complete the scientific experiment or work task to be performed. However, because the metal or non-metal material in the vacuum cavity can deflate under the vacuum condition and the sealing of various sealing covers cannot be closed strictly, after a long time, the metal or non-metal material can leak slightly more or less. This means that the vacuum level will drop slightly over time and the desired vacuum level will not be maintained.

Particularly, in the vacuum chamber of the low-temperature experiment, even if very little air is mixed, moisture enters the low-temperature vacuum chamber, and a series of serious problems such as icing and freezing are caused. The experiment was not allowed to proceed normally. When the experiment or work is carried out in the vacuum cavity, the starting and the operation of the vacuum pump are not allowed, and the vibration and other interference caused by the operation of the vacuum pump are unacceptable for most experimental conditions. There are also special cases, such as suction devices used on satellites, which do not allow the installation of large rotary working pumps.

In view of the above, how to maintain the working cycle or maintain the required vacuum degree without using a vacuum pump is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is an object of the present invention to provide a vacuum degree maintaining device which has a function of a vacuum pump and does not generate vibration and disturbance.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a vacuum level maintaining apparatus comprising: ultra-low temperature mounting panel, shell, adsorbing material, toast temperature regulating device, set up the inner chamber in the shell, adsorbing material set up in the inner chamber, the top of shell sets up the induction port with the inner chamber intercommunication, toast temperature regulating device set up in the bottom of shell, the shell with the ultra-low temperature mounting panel is connected.

Preferably, the housing comprises a base and a barrel, the barrel is arranged on the base, and the air suction port is arranged at the top of the barrel.

Preferably, the induction port includes the tubaeform gas receiving port, the upper end diameter of tubaeform gas receiving port is greater than the lower extreme diameter, tubaeform gas receiving port with set up the sealing washer between the barrel, tubaeform gas receiving port pass through bolted connection in the barrel.

Preferably, a rectification screen is arranged in the cylinder below the horn-shaped air receiving opening, and the rectification screen is arranged above the adsorbing material.

Preferably, a fixing piece is arranged above the rectifying screen, and the horn-shaped air receiving opening compresses the fixing piece on the rectifying screen.

Preferably, the baking temperature control device comprises a temperature sensor, a baking electric heater and a temperature controller, the baking electric heater is arranged in the base, the temperature sensor is arranged outside the base, and the temperature sensor and the baking electric heater are connected with the temperature controller.

Preferably, the housing is an oxygen free copper housing.

Preferably, the adsorbent material is activated carbon, pumice or a metal sintered mesh.

The vacuum degree maintaining device provided by the application utilizes the super strong adsorption capacity of the adsorption material to manufacture the self-adsorption pump without electric power and other energy sources, and the adsorption pump does not have any vibration, noise or other interference possibly brought to the experiment when working. Meanwhile, the device has simple structure and flexible and convenient installation and use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a three-dimensional view of the housing, air intake and baking temperature control device provided in the present invention;

FIG. 2 is a top view of the enclosure, air intake, adsorbent material and baking temperature control device provided in the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a schematic view of the vacuum degree maintaining device provided in the vacuum chamber.

In FIGS. 1-4:

1-air suction port, 2-cylinder, 3-base, 4-temperature sensor, 5-baking electric heater, 6-rectifying screen, 7-sealing ring, 8-fixing piece, 9-adsorbing material, 10-vacuum cavity and 11-ultralow temperature mounting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the utility model is to provide a vacuum degree maintaining device which has the function of a vacuum pump and does not generate vibration and interference.

Referring to fig. 1 to 4, a vacuum maintaining device includes: ultra-low temperature mounting panel 11, shell, adsorbing material 9, toast temperature regulating device set up the inner chamber in the shell, and adsorbing material 9 sets up in the inner chamber, and the top of shell sets up induction port 1 with the inner chamber intercommunication, toasts temperature regulating device and sets up in the bottom of shell, and the shell is connected with ultra-low temperature mounting panel 11.

It should be noted that the cryogenic systems applicable to the present application are mainly 1K refrigeration systems and 4K refrigeration systems. In a 1K refrigeration system, the temperature of the ultralow temperature mounting plate 11 is 1.0K-1.5K; in the 4K system, the ultra-low temperature mounting plate 11 is at a temperature of 4-4.2K.

The shell is installed on ultra-low temperature mounting panel 11, and ultra-low temperature mounting panel 11 can conduct the ultra-low temperature to the shell, reduces the temperature of shell, makes near the little gas molecules of shell wherein partly become solid-state by gaseous phase transition, and another part becomes liquid. The inner cavity of the housing is provided for accommodating the adsorbent material 9, preferably the adsorbent material 9 is a porous medium adsorbent material.

With the vacuum degree holding device that this application provided sets up in the vacuum cavity 10 body, when having had few gas molecules in the vacuum cavity 10 body, under the effect of ultra-low temperature, gas molecule partly meeting phase change in the induction port 1 becomes the solid, another part becomes liquid, and absorb by adsorption material 9, can form negative pressure state at induction port 1, make the outside gas molecule of shell can be continuous to induction port 1 motion, then the few gas molecule of continuous production can be continuously inhaled adsorption material 9, thereby keep the vacuum degree in the vacuum cavity 10 body.

After the experimental work, often all will toast heating and evacuation again, toast the heating and control stoving temperature through the stoving temperature regulating device who sets up at the shell, vacuum cavity 10 after the stoving more is favorable to and reaches the required vacuum condition of experiment more rapidly. When the baking temperature control device is heated, the solid or the liquid absorbed in the absorption material 9 is heated along the belt, so that the solid or the liquid is changed into gas molecules again under the action of the absorption force, the gas molecules are released from the absorption material 9 and then are pumped out by the vacuum pump to be discharged.

In addition to the above embodiment, it is further preferable that the housing includes a base 3 and a cylindrical body 2, the cylindrical body 2 is provided on the base 3, and the air inlet 1 is provided on the top of the cylindrical body 2. The base 3 is flat, the lower opening of the cylinder 2 is sealed by the base 3, the upper opening of the cylinder 2 is connected with the air suction port 1, the inner cavity of the shell is the inner cavity of the cylinder 2, and the adsorbing material 9 is arranged in the inner cavity of the cylinder 2. The shell has the advantages of simple structure, convenient processing and strong surrounding sealing property.

In addition to the above-described embodiments, it is further preferable that the air inlet 1 includes a trumpet-shaped air outlet having an upper end diameter larger than a lower end diameter, and the lower end of the trumpet-shaped air outlet is connected to the cylindrical body 2. The diameter of the upper opening of the horn-shaped air receiving opening is larger, so that the air suction area can be increased, and the diameter of the lower opening of the horn-shaped air receiving opening is smaller, so that external gas molecules can enter the cylinder body 2 along the horn-shaped air receiving opening conveniently.

In order to enhance the suction effect of the vacuum degree maintaining device, in addition to the above-described embodiment, it is further preferable to provide a seal ring 7 between the flared air-receiving opening and the cylinder 2. The sealing ring 7 can improve the sealing performance between the horn-shaped air receiving port and the cylinder body 2, so that the cylinder body 2 and the horn-shaped air receiving port are sealed channels, and air is ensured to enter only along the top opening of the horn-shaped air receiving port.

In order to enhance the stability of the installation of the seal ring 7, in addition to the above embodiment, it is further preferable that the trumpet-shaped air receiving port is connected to the cylinder 2 by a bolt. The periphery of the lower part of the horn-shaped air receiving port is provided with a flange which is connected with the top surface of the cylinder body 2 through bolts, and the bolts are uniformly distributed along the flange. The trumpet-shaped air-receiving port and the cylinder 2 are tightened through the bolt so as to improve the force of clamping the sealing ring 7 by the trumpet-shaped air-receiving port and the cylinder 2.

In addition to the above embodiment, it is further preferable that the cylindrical body 2 below the trumpet-shaped air receiving opening is provided with the flow straightening screen 6, and the flow straightening screen 6 is provided above the adsorbent 9. The rectifying screen can play a role in rectifying, and the suction effect of the vacuum degree maintaining device is improved.

In order to improve the stability of the installation of the fairing screen 6, in addition to the above embodiment, it is further preferable that a fixing member 8 is provided above the fairing screen 6, and the flared air collecting port presses the fixing member 8 against the fairing screen 6. The mounting 8 is cyclic annular barrel 2, and the lower part internal diameter of loudspeaker shape receipts gas port is less than the internal diameter of barrel 2, and the periphery of mounting 8 is laminated in the inner wall of barrel 2, and the gas port is received to loudspeaker shape compresses tightly in the up end of mounting 8, makes the lower terminal surface of mounting 8 compress tightly in rectifier screen 6.

On the basis of the above embodiment, as a further preferred, the baking temperature control device includes a temperature sensor 4, a baking electric heater 5 and a temperature controller 7, the baking electric heater 5 is disposed in the base 3, the temperature sensor 4 is disposed outside the base 3, and both the temperature sensor 4 and the baking electric heater 5 are connected with the temperature controller. The baking electric heater 5 provides a heat source, the temperature sensor 4 can detect the temperature change around the outer shell and transmit the temperature signal to the temperature controller, and the temperature controller controls the temperature of the baking electric heater 5 according to the temperature signal so as to adjust the baking temperature of the baking electric heater 5 according to the actual temperature around the outer shell and control the temperature of the outer shell 3.

In addition to the above embodiments, it is further preferable that the outer shell is an oxygen-free copper outer shell. The casing thermal conductivity of oxygen-free copper is strong, and the ultra-low temperature of the ultra-low temperature mounting plate 11 of being convenient for is conducted to the casing.

In addition to the above embodiments, the adsorbent 9 is preferably activated carbon, pumice, or a metal sintered mesh. The metal sintering net is a porous sintering block for metal sintering; the pumice is pumice balls with the diameter of less than 2 mm; the activated carbon is a uniform activated carbon ball with the diameter less than 2 mm, which is prepared by synthesis, the cost of the synthesized activated carbon ball is the lowest, but the activated carbon ball must be thoroughly cleaned by purging before use, and any carbon ash cannot appear.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The vacuum degree maintaining device provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A vacuum level maintaining apparatus, comprising: ultra-low temperature mounting panel (11), shell, adsorbing material (9), toast temperature regulating device, set up the inner chamber in the shell, adsorbing material (9) set up in the inner chamber, the top of shell sets up induction port (1) with the inner chamber intercommunication, toast temperature regulating device set up in the bottom of shell, the shell with ultra-low temperature mounting panel (11) are connected.

2. The vacuum degree maintaining device according to claim 1, characterized in that the housing comprises a base (3) and a cylinder (2), the cylinder (2) is arranged on the base (3), and the suction port (1) is arranged on the top of the cylinder (2).

3. The vacuum degree maintaining device according to claim 2, wherein the air suction port (1) comprises a horn-shaped air receiving port, the upper end diameter of the horn-shaped air receiving port is larger than the lower end diameter of the horn-shaped air receiving port, a sealing ring (7) is arranged between the horn-shaped air receiving port and the cylinder (2), and the horn-shaped air receiving port is connected to the cylinder (2) through a bolt.

4. The vacuum degree maintaining device according to claim 3, characterized in that a rectifying screen (6) is arranged in the cylinder (2) below the flared gas receiving port, and the rectifying screen (6) is arranged above the adsorbing material (9).

5. The vacuum degree maintaining device according to claim 4, characterized in that a fixing member (8) is arranged above the fairing screen (6), and the flared air receiving opening presses the fixing member (8) against the fairing screen (6).

6. The vacuum degree maintaining device according to claim 2, wherein the baking temperature control device comprises a temperature sensor (4), a baking electric heater (5) and a temperature controller, the baking electric heater (5) is arranged in the base (3), the temperature sensor (4) is arranged outside the base (3), and the temperature sensor (4) and the baking electric heater (5) are both connected with the temperature controller.

7. The vacuum level maintaining apparatus of claim 1, wherein the housing is an oxygen-free copper housing.

8. The vacuum degree maintaining apparatus according to claim 1, wherein the adsorbing material (9) is activated carbon, pumice, or a metal sintered mesh.