Device for testing concentration of medium

Abstract

The utility model discloses a device for testing the concentration of a medium, which comprises a tank body which is internally provided with a cavity for placing a solid medium or a liquid medium; the vacuumizing device is provided with an air exhaust end communicated with the cavity, and the vacuumizing device is configured to be used for vacuumizing the cavity through the air exhaust end; the first detection device is provided with a first detection end communicated with the cavity, and the first detection end is used for detecting the vacuum degree of the cavity; the heating device is arranged on the tank body, the heating device comprises at least one heating part, the heating part is located in the tank body and used for heating the cavity, and the heating part and the first detection end are arranged in a spaced mode. The vacuum experiment is carried out by selecting the inner cavity defined by the single-layer tank body, the influence degree of different single media on vacuum under different technological processes can be tested, the structure is simple and compact, vacuumizing can be rapidly carried out, the structure is simplified, leakage and the influence on the vacuum can be reduced, the experiment stability is improved, and the experiment cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of detection devices, in particular to a device for testing medium concentration. BACKGROUND

[0002] With the increasing demand for double-shell low-temperature products, various performance indicators are continuously optimized, and different media can be filled in the interlayer, such as thermal insulation cotton, glass steel, adsorbent, molecular sieve, liquid, and shell material, etc. Different media will release or adsorb gas particles over time, thereby affecting the vacuum in the interlayer. How to simulate the process of industrial production to understand the impact of different media on the vacuum degree is self-evident in guiding design, analyzing product performance, and guiding production. However, the existing testing of interlayer medium outgassing concentration has the following problems:

[0003] 1. The double-shell pressure vessel has a large interlayer space, and the test medium concentration changes for a long period of time.

[0004] 2. The double-shell pressure vessel has a complex structure, and the double-shell product is mainly a welded structural member, which has many welding leakage points and is easy to affect the vacuum, so it is not suitable as experimental equipment.

[0005] On the market, there is still a lack of a reliable, stable, and economical testing device for testing the outgassing concentration or adsorption concentration of a single medium. CONTENT OF THE INVENTION

[0006] To solve the above problems, the present application provides a device for testing medium concentration.

[0007] According to an aspect of an embodiment of the present application, a device for testing medium concentration is disclosed, which comprises a tank body having an internal cavity, the cavity being used for placing solid or liquid medium;

[0008] A vacuum pumping device having a gas pumping end in communication with the cavity, the vacuum pumping device being configured to pump vacuum to the cavity through the gas pumping end;

[0009] A first detection device having a first detection end in communication with the cavity, the first detection end being used for detecting the vacuum degree of the cavity;

[0010] A heating device provided on the tank body, the heating device comprising at least one heating portion, the heating portion being located in the tank body and being used for heating the cavity, the heating portion being spaced apart from the first detection end.

[0011] In an exemplary embodiment, the heating portion extends along the axial extension direction of the tank body.

[0012] In an exemplary embodiment, at least one of the heating portions is located on the axis of the tank body; and / or

[0013] The heating portions are multiple, and the multiple heating portions are spaced around the circumference of the tank body.

[0014] In an exemplary embodiment, the heating device comprises at least one electric heating rod, and the portion of the electric heating rod that extends into the tank body is the heating portion.

[0015] The tank body is provided with a support tube, the tube opening of the support tube is in communication with the outside, the tube body of the support tube extends into the chamber, the tube body of the support tube forms a tube cavity for the electric heating rod to pass through, and the tube cavity and the chamber are independent of each other.

[0016] The electric heating rod is surrounded by a heat insulation protection structure on the portion outside the tank body.

[0017] In an exemplary embodiment, the heating device and the first detection device are separately arranged on the two sides of the tank body in the axial direction; and / or

[0018] The distance between the end of the heating portion close to the first detection device and the first detection device is greater than or equal to 400 mm; and / or

[0019] The tank body extends in the horizontal direction in the axial direction, and the bottom of the tank body is provided with at least two bases spaced in the axial direction.

[0020] In an exemplary embodiment, the side wall of the tank body is provided with a three-way pipe fitting, the three-way pipe fitting has a first pipe head, a second pipe head and a third pipe head in communication with each other; the first pipe head is in sealed communication with the chamber, the second pipe head is used for sealed communication with the air extraction end, and the third pipe head is used for sealed communication with the first detection end.

[0021] In an exemplary embodiment, a sealing member is arranged in the second pipe head, the sealing member is located between the air extraction end and the chamber, and the sealing member is configured to be able to conduct or seal the second pipe head inside the second pipe head, thereby sealing or communicating between the air extraction end and the chamber.

[0022] In an exemplary embodiment, the inner periphery of the second pipe head is provided with a slope, which can gradually reduce the inner diameter of the second pipe head inwardly in a direction away from the pipe opening of the second pipe head, the sealing member is sealingly arranged at a position in the second pipe head corresponding to the slope, the outer side wall of the tee pipe fitting is provided with a handle, the handle is inserted into the second pipe head and connected with the sealing member, the handle is configured to adjust the axial position of the sealing member relative to the second pipe head, so that the sealing member is moved inwardly relative to the second pipe head to seal the second pipe head, or moved outwardly relative to the second pipe head to form a gap with the inner wall of the second pipe head.

[0023] In an exemplary embodiment, the controller is electrically connected with the first detection device and is configured to control the first detection end of the first detection device to open or close the detection of the chamber, and after the first detection end detects the chamber, control the first detection end to detect the chamber after a preset time interval.

[0024] The controller is also electrically connected with the heating device and is configured to control the opening or closing of the heating device.

[0025] In an exemplary embodiment, the vacuumizing device further comprises a vacuum pump and a second detection device.

[0026] The vacuum pump has an air inlet and an air outlet, the air inlet of the vacuum pump is the air outlet end, and the vacuum pump is configured to vacuumize the chamber.

[0027] The second detection device has a second detection end in communication with the air outlet of the vacuum pump, and the second detection end is used to detect the vacuum degree of the gas at the air outlet of the vacuum pump.

[0028] The embodiments of the present application provide at least the following beneficial effects:

[0029] The device for testing medium concentration provided by the application can draw vacuum on the chamber of the tank body through the vacuum drawing device, so that the vacuum degree of the chamber reaches the specified requirement, and the heating part of the heating device can heat the chamber, which can not only simulate the specified temperature of the vacuum drawing process in the production process, but also accelerate the speed of the gas particles released by the medium. With the increase of time, the medium in the chamber continuously releases gas particles, and the vacuum degree in the chamber is detected by the first detection end of the first detection device, so that the concentration and concentration change of the gas released by the medium can be obtained. The internal chamber surrounded by the single-layer tank body is used for vacuum experiment, which has simple and compact structure, can quickly reach the specified requirement of the vacuum degree in the tank body, simplifies the structure, reduces leakage and the influence on the vacuum, improves the stability and reliability of the experiment, reduces the experimental cost, has economy, and can find out the gas release rule of different media by testing the influence degree of different single media on the vacuum under different process flows.

[0030] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0031] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0032] Figure 1 The composition structure diagram of the device for testing medium concentration provided by an embodiment of the application is shown.

[0033] Figure 2 The specific structure diagram of the tank body and the support pipe provided by an embodiment of the application is shown.

[0034] Figure 3 The installation schematic diagram of the tee pipe provided by an embodiment of the application is shown.

[0035] Figure 4 The structure schematic diagram of the second pipe head provided by an embodiment of the application is shown.

[0036] The reference signs are explained as follows: 1-tank body, 11-cylinder body, 12-head, 13-bottom, 14-chamber, 2-medium, 3-heating device, 31-heating part, 32-electric heating rod, 33-support pipe, 331-pipe opening, 332-pipe body, 333-pipe cavity, 4-vacuum drawing device, 41-gas drawing end, 5-first detection device, 51-first detection end, 52-sealing valve, 6-tee pipe, 61-first pipe head, 62-second pipe head, 621-inclined surface, 622-pipe head opening, 63-third pipe head, 71-sealing element, 72-protection cover, 73-plug, 74-sealing ring. DETAILED DESCRIPTION

[0037] Example implementations are now described in greater detail in conjunction with the drawings. It should be understood, however, that the example implementations can be practiced with modification and alteration, and are not limited to the examples described herein. Rather, the example implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example implementations to those skilled in the art.

[0038] In the description of the present application, all the connection relations mentioned are not single components directly connected, but can be combined into a better connection structure by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the present application can be combined interactively without mutual contradiction and conflict.

[0039] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing and connecting should be understood broadly, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical scheme.

[0040] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like based on the orientation or position relationship shown in the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to 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.

[0041] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number.

[0042] The application discloses a device for testing medium concentration, which analyzes the change of the vacuum environment of the system by testing the data in the system container, and provides data support for detecting the outgassing concentration of the medium 2 in the vacuum system.

[0043] The device for testing medium concentration of the present application comprises a tank body 1, a heating device 3, a vacuum pumping device 4 and a first detection device 5. The tank body 1 has a cavity 14 inside for placing a medium 2. The medium 2 can be a solid medium 2 or a liquid medium 2 capable of releasing or adsorbing gas particles. The vacuum pumping device 4 has a gas pumping end 41 communicating with the cavity 14 and is configured to pump the cavity 14 through the gas pumping end 41 to simulate the environment of the medium 2 in the actual product. The first detection device 5 has a first detection end 51 communicating with the cavity 14 and is used to detect the vacuum degree of the cavity 14. The change of the vacuum environment of the cavity 14 is analyzed by testing the detection data to provide data support for detecting the outgassing concentration of the medium 2 in the vacuum system. The heating device 3 is arranged on the tank body 1 and comprises at least one heating part 31 located inside the tank body 1 and used to heat the cavity 14. The heating device 3 can simulate the heating of the cavity 14 to the specified temperature of the double-layer shell pressure container vacuum pumping process. The heating part 31 is arranged in a spaced manner with the first detection end 51 to avoid the high temperature of the heating part 31 causing the sealing failure of the first detection end 51.

[0044] The device for testing medium concentration of the present embodiment pumps the cavity 14 of the tank body 1 through the vacuum pumping device 4 to reach the specified requirement of the vacuum degree of the cavity 14. The heating part 31 of the heating device 3 can heat the cavity 14 to not only simulate the specified temperature of the vacuum pumping process of the production process but also accelerate the speed of the medium 2 releasing gas particles. With the increase of time, the medium 2 inside the cavity 14 continuously releases gas particles. The vacuum degree inside the cavity 14 is detected through the first detection end 51 of the first detection device 5 to obtain the concentration and the concentration change of the medium 2 releasing gas. The internal cavity 14 surrounded by the single-layer tank body 1 is used for the vacuum experiment. The structure is simple and compact. The vacuum degree inside the tank body 1 can quickly reach the specified requirement. The structure is simplified to reduce the leakage and the influence on the vacuum, improve the stability and reliability of the experiment, reduce the experimental cost, have the economy, test the influence degree of different single mediums 2 on the vacuum under different process flows, find out the gas release rule of different mediums 2, and use the obtained rule result for production guidance.

[0045] Figure 1 The device for testing medium concentration is a structural schematic view.

[0046] Reference Figure 1 The device for testing medium concentration comprises a tank body 1. The tank body 1 of the present embodiment extends in the horizontal direction. The cross section of the tank body 1 can be circular, square or the like. In some other embodiments, the tank body 1 can also extend in the vertical direction. In addition, the tank body 1 can be made of stainless steel, carbon steel or the like.

[0047] The bottom of the tank body 1 is axially spaced apart by at least two bases 13. The stability of the tank body 1 is improved, and the long-time placement of the tank body 1 is realized, which facilitates the experiment.

[0048] The tank body 1 of the present application comprises an inner hollow barrel 11 and a sealing cover head 12 arranged at the axial two ends of the barrel 11. The periphery of the cover head 12 can be connected to the end edge of the barrel 11 by welding. The barrel 11 of the present embodiment extends along the horizontal axis, and the base 13 is arranged on the barrel 11.

[0049] Further, the barrel 11 and the two cover heads 12 of the tank body 1 form a chamber 14 therebetween, which is used to place the solid medium 2 or the liquid medium 2. The solid medium 2 or the liquid medium 2 can release or absorb gas particles in a certain vacuum degree environment, and can be thermal insulation cotton, glass steel, adsorbent, molecular sieve, liquid or the material of the shell itself, etc. In the experiment, a single medium 2 is generally selected as the experimental object and placed in the chamber 14, so as to confirm whether different media 2 will release gas under a specific production process, and the concentration of the gas released by different media 2 under different experimental factors such as different production processes and time. The medium 2 in the chamber 14 can be deposited on the inner bottom of the tank body 1.

[0050] The device for testing the medium concentration of the present application further comprises a heating device 3.

[0051] The heating device 3 is arranged on the tank body 1, and the heating device 3 comprises at least one heating part 31, which is located in the tank body 1 and is used to heat the chamber 14. The heating device 3 can simulate the specified temperature of the vacuum process flow of the production process for the chamber 14 environment, and can accelerate the speed of the medium 2 releasing gas particles, reduce the experimental time, and improve the experimental efficiency. Moreover, the heating part 31 is located in the chamber 14, which ensures that the medium 2 in the chamber 14 can be heated. Figure 1 The heating device 3 of the embodiment is arranged on the cover head 12.

[0052] Further, the heating part 31 is located in the chamber 14, and the heating part 31 extends along the axial extension direction of the tank body 1. The extension direction of the heating part 31 conforms to the axial extension direction of the tank body 1, which can improve the heating uniformity of the heating part 31 to the chamber 14. The heating part 31 of the present embodiment extends along the horizontal direction.

[0053] Further, at least one heating part 31 is located on the axis of the tank body 1. As shown in Figure 1 the heating part 31 extends along the axis of the tank body 1 and is located in the middle of the tank body 1, so that the spacing between the heating part 31 and the inner peripheral wall of the tank body 1 tends to be uniform, which further improves the heating uniformity of the heating part 31 to the chamber 14.

[0054] In some embodiments, the heating part 31 has multiple, and the multiple heating parts 31 are spaced around the circumference of the tank body 1. The multiple heating parts 31 heat the chamber 14, improve the heating uniformity of the chamber 14, further improve the efficiency of the medium 2 releasing gas particles, and accelerate the experimental progress. Moreover, the staff can also heat the chamber 14 according to the selection of different number of heating parts 31 to form a contrast experiment, analyze the change of the medium 2 in the vacuum environment of the chamber 14 by detecting the vacuum value data of the chamber 14 under the same time period but different heating environments, and further study the adsorption of the medium 2 to provide data support.

[0055] In fact, the heating part 31 can have one, and the heating part 31 is located on the axis of the tank body 1. Or the heating part 31 has two or more, and the multiple heating parts 31 can be spaced around the circumference of the axis of the tank body 1. Among them, in the case of multiple heating parts 31, one of the heating parts 31 can also be located on the axis of the tank body 1 axis.

[0056] In some other embodiments, the heating part 31 can also extend along the radial direction of the tank body 1, or be parallel to the axis of the tank body 1, or be arranged in contact with the inner wall of the tank body 1. The specific setting position needs to be set according to the shape of the tank body 1 and the distance from the first detection device 5 and the like.

[0057] In this application, the heating device 3 includes at least one electric heating rod 32, and the part of the electric heating rod 32 extending into the inside of the tank body 1 is the heating part 31. The electric heating rod 32 adopts electric heating, can heat uniformly, and has a wide heating temperature range, providing different temperature gradients for experiments. The electric heating rod 32 in this embodiment can be used for experiments at 150°C.

[0058] The electric heating rod 32 can be all the rod body extending into the tank body 1, or part of the rod body of the electric heating rod 32 extending into the tank body 1. Specifically, the extending length of the electric heating rod 32 can be 2 / 3 of the length of the existing electric heating rod 32, to ensure that the medium 2 below the heating device 3 is heated uniformly and the temperature reaches the requirement. The part of the electric heating rod 32 located outside the tank body 1 is surrounded by a heat insulation protection structure to ensure production safety. In fact, the heat insulation protection structure can be heat insulation cotton, heat insulation ceramic and the like.

[0059] In some embodiments, the rod body of the electric heating rod 32 can be directly welded and fixed on the inner wall and / or outer wall of the tank body 1, to ensure the sealing performance of the connection between the heating device 3 and the tank body 1, and reduce gas leakage.

[0060] Figure 2 The specific structure diagram of the tank body 1 and the support pipe 33.

[0061] As Figure 2In the shown embodiment, the tank body 1 is provided with a support pipe 33, the support pipe 33 has a pipe body 332 and a pipe opening 331. The pipe opening 331 of the support pipe 33 is in communication with the outside, the pipe body 332 of the support pipe 33 extends into the chamber 14, and the pipe body 332 of the support pipe 33 defines a pipe cavity 333 for the electric heating rod 32 to pass through, and the pipe cavity 333 is independent of the chamber 14.

[0062] Specifically, one axial end of the support pipe 33 extends into the chamber 14, the pipe cavity 333 inside the support pipe 33 is independent of the chamber 14, and the pipe opening 331 of the support pipe 33 faces outward, facilitating the electric heating rod 32 to pass through the pipe opening 331 and into the pipe cavity 333. The electric heating rod 32 extends into the pipe cavity 333 along the axial extension direction of the support pipe 33, and the portion of the electric heating rod 32 extending into the pipe cavity 333 is the heating portion 31, which is used to heat the chamber 14 inside the tank body 1. The electric heating rod 32 of the present embodiment is detachably arranged with the tank body 1, facilitating use and maintenance, and existing electric heating rods 32 can be directly inserted for experiments in the workshop, reducing production investment and further improving economic efficiency.

[0063] The support pipe 33 of the present application is a steel pipe, facilitating heat transfer. The support pipe 33 is sealingly connected with the tank body 1. Specifically, the side wall of the tank body 1 has a mounting opening for mounting the support pipe 33, the support pipe 33 can pass through the mounting opening, and the outer peripheral wall of the support pipe 33 is weldingly fixed with the inner peripheral wall of the mounting opening, avoiding leakage of the chamber 14.

[0064] In some other embodiments, the heating device 3 can be a heat exchange pipe which is weldingly fixed on the tank body 1, and the heat exchange pipe has a feed opening and a discharge opening penetrating through the tank body 1. The heating device 3 continuously inputs the heat exchange medium 2, such as high-temperature gas or high-temperature liquid, into the feed opening of the heat exchange pipe, exchanges heat with the chamber 14, and realizes heating of the medium 2 in the chamber 14. In addition, the heating device 3 can also input low-temperature gas or liquid into the heat exchange pipe, so that the heat exchange pipe can also serve as a cooling function. The staff can analyze the release or adsorption of gas of the medium 2 in a low-temperature environment, enrich the contrast experiment, and increase the experimental flexibility.

[0065] Further, the device for testing the concentration of the medium further comprises a vacuumizing device 4.

[0066] The vacuumizing device 4 has a suction end 41 in communication with the chamber 14, and the vacuumizing device 4 is configured to vacuumize the chamber 14 through the suction end 41. Specifically, the vacuumizing device 4 comprises a vacuum pump having an air inlet and an air outlet, the air inlet of the vacuum pump is the suction end 41 and is in communication with the chamber 14, and by opening the vacuum pump, the vacuum pump can vacuumize the chamber 14 through the suction end 41.

[0067] The vacuumizing device 4 further comprises a second detecting device. The second detecting device has a second detecting end in communication with the outlet of the vacuum pump, and the second detecting end is used to detect the vacuum degree of the gas at the outlet of the vacuum pump.

[0068] The second detecting device can roughly detect the vacuum degree inside the chamber 14 by detecting the gas extracted from the chamber 14 by the vacuum pump. The vacuum pump can select to continue working or to be turned off according to the vacuum degree detected by the second detecting end. Specifically, if the second detecting device detects that the vacuum degree of the chamber 14 reaches the required vacuum degree for the experiment, the vacuum pump stops working. If the second detecting device detects that the vacuum degree of the chamber 14 does not reach the required vacuum degree, the vacuum pump continues to extract the gas from the chamber 14. In some other embodiments, the vacuum pump can be manually operated to start or stop, or the vacuum pump can be controlled by receiving the feedback signal from the second detecting device.

[0069] In the embodiment, the gas extraction end 41 of the vacuumizing device 4 can be connected to any position of the tank 1.

[0070] The device for testing the concentration of the medium according to the present application further comprises a first detecting device 5.

[0071] The first detecting device 5 has a first detecting end 51 in communication with the chamber 14, and the first detecting end 51 is used to detect the vacuum degree of the chamber 14. The first detecting end 51 is spaced apart from the heating part 31.

[0072] The first detecting device 5 can be a vacuum gauge, and the first detecting end 51 is formed on the vacuum gauge. The first detecting end 51 is generally sealed by rubber or other materials. The first detecting end 51 of the first detecting device 5 is spaced apart from the heating part 31 of the heating device 3. By maintaining the distance between the first detecting end 51 and the heating part 31, the sealing failure of the first detecting end 51 caused by the heat can be prevented.

[0073] Further, the distance between the end of the heating part 31 close to the first detecting device 5 and the first detecting device 5 is greater than or equal to 400 mm. The distance between the first detecting device 5 and the end of the heating part 31 close to the first detecting device 5 is controlled, which further reduces the possibility of the sealing failure of the first detecting device 5 caused by the heat and maintains the normal working of the first detecting device 5. In practice, the distance between the heating part 31 and the first detecting device 5 can be 400 mm or more.

[0074] Further, the first detection device 5 and the heating device 3 of the embodiment are arranged on the two sides of the tank body 1 in the axial direction. Specifically, the tank body 1 extends in the axial direction, and the first detection device 5 and the heating device 3 are arranged on the two ends of the tank body 1 in the axial direction, respectively, so as to keep a distance between the first detection device 5 and the heating device 3, and prevent the first detection end 51 from being damaged due to heat and causing leakage. In the embodiment, the first detection device 5 and the heating device 3 are arranged on the two end covers 12 of the tank body 1 in the axial direction, which is convenient for installation.

[0075] In some other embodiments, if the tank body 1 has a large inner diameter of the barrel 11 but a short axial length of the barrel 11, the first detection device 5 and the heating device 3 can also be arranged on the two sides of the tank body 1 in the radial direction. In fact, the first detection device 5 and the heating device 3 can also keep a certain distance on the tank body 1, and the specific arrangement positions can be staggered, for example, one of the heating device 3 and the first detection device 5 is arranged on the end cover 12, and the other is arranged on the side wall of the barrel 11; or the first detection device 5 and the heating device 3 are arranged on the same side of the tank body 1, for example, both the heating device 3 and the first detection device 5 are arranged on the end cover 12 or the barrel 11.

[0076] Further, the device for testing the concentration of the medium further comprises a controller. The controller is electrically connected with the first detection device 5 and is configured to control the first detection end 51 of the first detection device 5 to open or close the detection of the chamber 14, and after the first detection end 51 detects the chamber 14, the controller controls the first detection end 51 to detect the chamber 14 after a preset time interval. Specifically, the controller can control the first detection device 5 to detect the vacuum of the chamber 14 multiple times at a certain time interval, so as to obtain the change of the concentration of the released gas of the medium 2 with time in the experiment, and the obtained value can be output as a curve chart to realize data visualization. Or the controller can preset a time, and the first detection device 5 detects the chamber 14 after the preset time. The device is realized automatically.

[0077] In addition, the controller can also be electrically connected with the heating device 3 and be configured to control the opening or closing of the heating device 3. This is convenient for the staff to control.

[0078] Figure 3 It is a schematic view of the installation of the tee pipe fitting 6.

[0079] Reference Figure 1 and Figure 3The side wall of the tank body 1 is provided with a tee pipe fitting 6, the tee pipe fitting 6 has a first pipe head 61, a second pipe head 62 and a third pipe head 63 which are in communication with each other; the first pipe head 61 is in sealed communication with the chamber 14, the second pipe head 62 is used for being in sealed communication with the air extraction end 41, and the third pipe head 63 is used for being in sealed communication with the first detection end 51. The air extraction end 41 of the vacuum extraction device 4 and the first detection end 51 of the first detection device 5 can be communicated with the chamber 14 through the tee pipe fitting 6, avoiding the need to separately provide independent welded interfaces on the tank body 1 for the vacuum extraction device 4 and the first detection device 5, reducing the welded leakage points on the surface of the tank body 1, and reducing the influence on the vacuum environment of the chamber 14.

[0080] In fact, the first pipe head 61 of the tee pipe fitting 6 is welded on the tank body 1, and the vacuum extraction device 4 and the first detection device 5 can be detachably connected with the tee pipe fitting 6, reducing the opening holes on the tank body 1, facilitating transportation and on-site installation.

[0081] In addition, the second pipe head 62 is used for being in sealed communication with the air extraction end 41, and the third pipe head 63 is used for being in sealed communication with the first detection end 51. Specifically, when the vacuum extraction device 4 is working, the second pipe head 62 is in conduction, and the third pipe head 63 can be sealed, and the first detection device 5 does not work. After the vacuum extraction device 4 stops working, the second pipe head 62 can be sealed, the third pipe head 63 is in conduction, and the first detection device 5 works.

[0082] Figure 4 It is a structural schematic view of the second pipe head 62.

[0083] Further, referring to Figure 4 The second pipe head 62 is provided with a sealing element 71, the sealing element 71 is located between the air extraction end 41 and the chamber 14, and the sealing element 71 is configured to be able to conduct or seal the second pipe head 62 inside the second pipe head 62, so as to seal or communicate between the air extraction end 41 and the chamber 14.

[0084] By adjusting the sealing or conduction of the sealing element 71 to the second pipe head 62, the air extraction end 41 and the chamber 14 are sealed or communicated with each other. After the air extraction end 41 stops vacuumizing the chamber 14, the sealing of the second pipe head 62 can be realized by adjusting the sealing element 71 inside the second pipe head 62, avoiding the leakage of the chamber 14, being convenient and fast, and after the sealing element 71 seals the second pipe head 62, the worker can remove the vacuum extraction device 4 from the tee pipe fitting 6, facilitating the reuse of the vacuum extraction device 4.

[0085] Specifically, the inner periphery of the second pipe head 62 is provided with a slope 621, which can gradually reduce the inner diameter of the second pipe head 62 inwardly in a direction away from the pipe head opening 622 of the second pipe head 62. The sealing element 71 is sealingly arranged at a position corresponding to the slope 621 in the second pipe head 62. A handle is arranged on the outer side wall of the tee pipe fitting 6, penetrates into the second pipe head 62 and is connected with the sealing element 71. The handle is configured to adjust the axial position of the sealing element 71 relative to the second pipe head 62, so as to move the sealing element 71 inwardly or outwardly relative to the second pipe head 62 to seal the second pipe head 62 or form a gap between the inner wall of the second pipe head 62 and the sealing element 71. Specifically, when the sealing element 71 moves inwardly along the second pipe head 62 in a direction away from the pipe head opening 622 of the second pipe head 62, the outer periphery of the sealing element 71 is in abutment and interference fit with the slope 621, thereby sealing the second pipe head 62. When the sealing element 71 moves outwardly along the second pipe head 62 in a direction close to the pipe head opening 622 of the second pipe head 62, the sealing element 71 gradually separates from the slope 621, and a gap is formed between the inner wall of the second pipe head 62 and the sealing element 71, thereby realizing the conduction of the second pipe head 62. The handle extends out of the tee pipe fitting 6, so that the staff can adjust the axial position of the sealing element 71 in the second pipe head 62 through the handle. In addition, the handle can be sealingly connected with the tee pipe fitting 6 to avoid leakage during adjustment of the handle by the staff.

[0086] The outer periphery of the sealing element 71 of the present embodiment is provided with at least one sealing ring 74. When the outer periphery of the sealing ring 74 abuts against the slope 621, the sealing ring 74 can be compressed by the rebounding action of the sealing ring 74 to seal the pipeline of the second pipe head 62. The sealing element 71 is provided with a plug 73 close to the pipe head side of the second pipe head 62. After the sealing element 71 seals the second pipe head 62, the staff can twist the plug 73 by inserting the handle into the second pipe head 62, so as to further move the sealing element 71 inwardly and further improve the sealing effect. After the experiment is completed, the sealing element 71 can be moved outwardly by twisting the plug 73 through the handle.

[0087] When the device for testing medium concentration of the present application is installed, the electric heating rod 32 is inserted into the support pipe 33, and the suction end 41 of the vacuumizing device 4 is connected to the second pipe head 62. After the experiment starts, the power supply of the electric heating rod 32 is started and continuously heats the chamber 14 for a period of time, and then the vacuumizing device 4 is started to continuously vacuumize the chamber 14. After the steps of continuously repeating the introduction of helium into the chamber 14 and the vacuumization of the chamber 14, the vacuumizing device 4 is again continuously vacuumized for a long time. During this period, the heating of the electric heating rod 32 is stopped. After the vacuum degree of the chamber 14 reaches the target value required for the experiment, the vacuumizing device 4 is stopped, the second pipe head 62 is blocked by the sealing element 71, and finally the connection between the tee pipe fitting 6 and the vacuumizing device 4 is disconnected. The first detection device 5 is started and collects the vacuum degree data of the chamber 14.

[0088] The device for testing medium concentration can complete the experiment according to the above steps, and the device for testing medium concentration can be used as an experimental device. The purpose of the experiment is to reflect the influence degree of different single media 2 on the vacuum under different process flows according to the change of the vacuum degree of the detection chamber 14, so that the gas release rule of different media 2 can be found out. The results are mainly used for production guidance, such as whether the thermal insulation cotton, glass steel and the like need to be heated in advance, whether the amount of adsorbent, molecular sieve and the like needs to be increased, whether the tank body 1 needs to be specially treated and the like.

[0089] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

Claims

1. An apparatus for testing a concentration of a medium, characterized by, The device comprises: a tank body having a chamber inside for placing solid or liquid medium; a vacuum pumping device having a pumping end in communication with the chamber, the vacuum pumping device being configured to pump the chamber through the pumping end; a first detection device having a first detection end in communication with the chamber, the first detection end being used to detect the vacuum degree of the chamber; a heating device provided on the tank body, the heating device comprising at least one heating part located inside the tank body and used to heat the chamber, the heating part being spaced apart from the first detection end.

2. The device for testing medium concentration according to claim 1, wherein: the heating part extends along the axial extension direction of the tank body.

3. The device for testing medium concentration according to claim 2, wherein: at least one of the heating parts is located on the axis of the tank body; and / or the heating part has a plurality of parts, and the plurality of heating parts are spaced apart around the circumference of the tank body.

4. The device for testing medium concentration according to claim 1, wherein: the heating device comprises at least one electric heating rod, and the part of the electric heating rod extending into the tank body is the heating part; the tank body is provided with a support tube, the tube opening of the support tube is in communication with the outside, the tube body of the support tube extends into the chamber, the tube body of the support tube forms a tube cavity for the electric heating rod to pass through, and the tube cavity and the chamber are independent of each other; the electric heating rod is surrounded by a heat insulation protection structure outside the tank body.

5. The device for testing medium concentration according to claim 1, wherein: the heating device and the first detection device are separately arranged on the two sides of the tank body in the axial direction; and / or the distance between the end of the heating part close to the first detection device and the first detection device is greater than or equal to 400 mm; and / or the tank body extends in the horizontal direction in the axial direction, and the bottom of the tank body is spaced apart in the axial direction and provided with at least two bases.

6. The device for testing medium concentration according to claim 1, wherein: the side wall of the tank body is provided with a three-way pipe fitting, the three-way pipe fitting has a first pipe head, a second pipe head and a third pipe head in communication with each other; the first pipe head is in sealed communication with the chamber, the second pipe head is used to be in sealed communication with the pumping end, and the third pipe head is used to be in sealed communication with the first detection end.

7. The device for testing medium concentration according to claim 6, wherein: a sealing element is arranged in the second pipe head, the sealing element is located between the pumping end and the chamber, and the sealing element is configured to be able to guide through or seal the second pipe head inside the second pipe head, thereby sealing or communicating between the pumping end and the chamber.

8. The device for testing medium concentration according to claim 7, wherein: The inner periphery of the second pipe head is provided with a slope, which can make the inner diameter of the second pipe head gradually reduce inwardly in the direction away from the pipe opening of the second pipe head. The sealing element is sealingly arranged in the second pipe head at a position corresponding to the slope. The outer side wall of the tee pipe element is provided with a handle. The handle is inserted into the second pipe head and connected with the sealing element. The handle is configured to adjust the axial position of the sealing element relative to the second pipe head, so as to make the sealing element sealingly move inwardly relative to the second pipe head or move outwardly relative to the second pipe head to form a gap with the inner wall of the second pipe head.

9. The apparatus for testing a medium concentration of claim 1, wherein, Also comprising: a controller, which is electrically connected with the first detection device and is configured to control the first detection end of the first detection device to open or close the detection on the chamber, and after the first detection end detects the chamber, control the first detection end to detect the chamber after a preset time interval; the controller is also electrically connected with the heating device and is configured to control the opening or closing of the heating device.

10. The device for testing medium concentration according to claim 1, characterized in that, the vacuumizing device further comprises a vacuum pump and a second detection device; the vacuum pump has an air inlet and an air outlet, the air inlet of the vacuum pump is the air outlet, and the vacuum pump is configured to vacuumize the chamber; the second detection device has a second detection end in communication with the air outlet of the vacuum pump, and the second detection end is used to detect the vacuum degree of the gas at the air outlet of the vacuum pump.

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