Circulating stirring device in environmental chamber and environmental chamber

Abstract

The utility model discloses an environmental chamber internal circulation stirring device and an environmental chamber. The environmental chamber internal circulation stirring device comprises a fixed seat, a magnetic coupling and a stirring rotating shaft, the joint of the fixed seat and the cabin is sealed, the magnetic coupling is arranged at one end of the fixed seat far away from the cabin and comprises an outer magnetic circuit and an inner magnetic circuit, and the outer magnetic circuit is connected with the motor; one end of the stirring rotating shaft extends into the cabin through the through hole, and the other end is inserted into the inner magnetic circuit. According to the utility model, the inevitable problem of moving part abrasion in the traditional mechanical seal is avoided, and the problem of air leakage caused by continuous friction between the through hole and the gasket is eliminated, so that the air tightness of the environmental chamber is greatly improved, and the stability and the reliability of a system are improved. The design of the magnetic coupling and the O-shaped sealing ring is more durable, the requirement for frequent replacement and maintenance is reduced, the maintenance cost is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental experiment chambers, in particular to an environmental chamber internal circulation stirring device and an environmental chamber. Background Art

[0002] The environmental test chamber is a device used to simulate and test the operation of products under various environmental conditions. It can simulate a variety of environmental conditions such as high and low temperature, high and low humidity, high altitude, low air pressure, vibration, salt spray, etc., and perform performance tests, reliability tests and durability tests on products. The installation of the internal circulation stirring motor of the existing environmental chamber is generally to open a small hole on the cabin body, directly extend the motor main shaft into the cabin through the small hole, and a sealing gasket is provided between the motor and the cabin body for sealing. The main function of the sealing gasket is to fill the gap between the motor main shaft and the small hole of the cabin body to prevent gas leakage. However, since the motor main shaft needs to rotate continuously during operation, the through hole and the sealing gasket will inevitably not be able to fit the main shaft completely and tightly, otherwise the friction will be too large to affect the function of rotating and stirring; in addition, the sealing gasket will be affected by the friction and extrusion of the main shaft, and the wear will become more and more serious as it continues to work for a period of time. This continuous mechanical action will cause the fit between the gasket material and the through hole to become worse and worse, thereby reducing its sealing performance. At the same time, in the design of the existing technology, the sealing gasket is in direct contact with the environment inside the environmental chamber through a small hole, which is also a factor that causes certain damage to the sealing gasket. For example, if there is a harsh environment such as high temperature, high humidity or corrosive gas in the cabin, these factors will accelerate the aging and damage of the sealing gasket and thus affect the airtightness of the environmental chamber. Utility Model Content

[0003] According to the embodiments of the utility model, in order to solve the above-mentioned deficiencies in the prior art, a circulating stirring device in an environmental chamber is provided, which is used to stir the substances inside the environmental chamber, and comprises a fixed seat, a magnetic coupling, and a stirring shaft; the fixed seat is arranged on the outside of the chamber body and covered on the through hole, and the connection between the fixed seat and the chamber body is sealed; the magnetic coupling is arranged at one end of the fixed seat away from the chamber body, the magnetic coupling comprises an external magnetic circuit and an internal magnetic circuit, and the external magnetic circuit is connected to the motor; one end of the stirring shaft extends into the chamber body through the through hole, and the other end is inserted into the internal magnetic circuit.

[0004] Preferably, the connection between the fixing seat and the cabin body is sealed by welding.

[0005] Preferably, the motor and the magnetic coupling are fixed by a connecting piece, and the motor includes a motor main shaft, which is inserted into the external magnetic circuit.

[0006] Preferably, a sealing cover is disposed outside the magnetic coupling.

[0007] Preferably, the motor is arranged in the sealing cover, and an open end of the sealing cover faces the fixing seat and is connected to the fixing seat.

[0008] Preferably, the sealing cover is bell-shaped and has openings at both ends, one end close to the cabin body is connected to the fixing seat, and the other end away from the cabin body is connected to the motor.

[0009] Preferably, one end of the sealing cover connected to the fixing seat has an end surface, a groove is provided on the end surface, and a sealing gasket is provided in the groove.

[0010] Preferably, the end surface is annular, the groove is an annular groove, and the sealing gasket is an O-ring.

[0011] Preferably, the magnetic material of the magnetic coupling is samarium cobalt.

[0012] According to the first embodiment of the utility model, the circulating stirring device in the environmental chamber can be connected to the motor fixing seat and the chamber body by full welding, and a magnetic coupling is used to achieve contactless transmission, avoiding the wear problem caused by direct contact, and eliminating the leakage problem caused by continuous wear of the through holes and gaskets, thereby greatly improving the air tightness of the environmental chamber and improving the stability and reliability of the system. The gaskets in the traditional sealing method need to be replaced regularly to maintain air tightness, which increases maintenance costs and manpower investment, while the magnetic coupling and O-ring design in this technical solution are more durable, reducing the need for frequent replacement and maintenance, reducing maintenance costs, and extending the service life of the equipment.

[0013] And an environmental chamber, comprising the environmental chamber internal circulation stirring device of the first embodiment. The traditional dynamic seal is replaced by an O-ring disposed between the magnetic coupling and the environmental chamber body, which is a static part with good sealing effect, and avoids leakage of substances in the chamber.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the external structure of the circulating stirring device in the environmental chamber according to an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the circulating stirring device in the environmental chamber according to an embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the circulating stirring device in the environmental chamber according to an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0019] First, combine Figures 1 to 3The circulating stirring device in the environmental chamber according to the embodiment of the utility model is widely used in material research, biological research, air quality research, etc. In this embodiment, a sealed environmental chamber requiring circulating stirring is taken as an example for description.

[0020] like Figures 1 to 3 As shown, the internal circulation stirring device of the environmental chamber of the embodiment of the utility model is used for stirring the substances inside the environmental chamber, and comprises a fixing seat 1, a magnetic coupling 4, and a stirring shaft 5.

[0021] Specifically, Figures 1 to 3 As shown, the fixed seat 1 is arranged on the outside of the cabin 2 and is covered by the through hole. The connection between the fixed seat 1 and the cabin 2 is sealed, which not only provides a stable support for the stirring shaft 5, but also effectively prevents the exchange of materials inside and outside the environmental cabin by covering the through hole. This ensures the sealing of the environmental cabin, prevents the entry of external pollutants and the leakage of materials in the cabin, thereby ensuring the accuracy of the experiment or test; the magnetic coupling 4 is arranged at the end of the fixed seat 1 away from the cabin 2, and the magnetic coupling 4 includes an external magnetic circuit 41 and an internal magnetic circuit 42. The external magnetic circuit 41 is connected to the motor 3. The use of the magnetic coupling 4 realizes the contactless transmission between the motor 3 and the stirring shaft 5, avoiding the wear of the moving parts that are inevitably caused by traditional mechanical seals, and then the leakage problem; one end of the stirring shaft 5 extends into the cabin 2 through the through hole, and the other end is inserted into the internal magnetic circuit 42. The design of the stirring shaft 5 enables the stirring blade to directly extend into the environmental cabin to achieve effective stirring of the internal fluid. At the same time, since the other end of the stirring shaft 5 is inserted into the internal magnetic circuit 42, the stirring shaft 5 can be indirectly controlled and driven through the action of the magnetic coupling 4, and all places where leakage may occur with the outside world are sealed with static connectors, thereby improving the sealing performance.

[0022] Preferably, the connection between the fixing seat 1 and the cabin body 2 is sealed by welding, which has good sealing effect and low manufacturing cost.

[0023] Preferably, if Figure 3 As shown, the motor 3 and the magnetic coupling 4 are fixed by a connecting piece, and the motor 3 includes a motor main shaft 31, and the motor main shaft 31 is inserted into the external magnetic circuit 41. The internal and external magnetic circuits 41 are respectively connected to the stirring mechanism and the functional mechanism, dividing the torque transmission into an indirect mode, and respectively realizing sealing to reduce gas leakage.

[0024] Preferably, a sealing cover 6 is disposed outside the magnetic coupling 4 to further protect against gas leakage.

[0025] Preferably, if Figure 1 , 2As shown, the motor 3 is arranged in the sealing cover 6, and the opening end of the sealing cover 6 faces the fixing base 1 and is connected to the fixing base 1. The sealing cover 6 can adopt various forms, among which one end can be opened to completely place the motor 3 inside it, and the whole is fully sealed. The only way of leakage is leakage through the connection formed by the opening and the fixing base 1, which reduces the possibility of leakage.

[0026] Preferably, if Figure 3 As shown, the sealing cover 6 can also be bell-shaped with openings at both ends. The design of the bell-shaped sealing cover 6 enhances its structural stability. Since the bell-shaped structure has excellent force distribution characteristics, the sealing cover 6 can maintain better stability when subjected to internal and external pressures and is not easily deformed or damaged. This helps to ensure the reliability and stability of the stirring device during long-term operation. The end close to the cabin 2 is connected to the fixed seat 1, which is consistent with the previous scheme, and the end away from the cabin 2 is connected to the motor 3. The connection is sealed. The opening design of the bell-shaped sealing cover 6 facilitates the connection with the fixed seat 1 and the motor 3, and can ensure that the connection between the sealing cover 6 and the fixed seat 1 and the motor 3 is tight and reliable, thereby effectively preventing fluid or gas from leaking from the connection. This design also simplifies the installation and maintenance process.

[0027] Preferably, if Figure 2 As shown, one end of the sealing cover 6 connected to the fixing seat 1 has an end face 61, a groove 62 is provided on the end face 61, and a sealing gasket is provided in the groove 62. By providing the groove 62 on the end face 61 and installing the sealing gasket, an additional sealing layer can be formed. The sealing gasket is an elastic accessory that effectively prevents fluid or gas from leaking from the connection between the sealing cover 6 and the fixing seat 1. This design significantly improves the sealing performance of the entire stirring device and ensures that the environmental parameters in the environmental chamber remain stable. At the same time, the sealing gasket can be made of wear-resistant and corrosion-resistant materials, which can withstand long-term use and harsh working environments.

[0028] Preferably, if Figure 2 As shown, the end face 61 is annular, the groove 62 is an annular groove, and the sealing gasket is an O-ring, which seals in all directions around the circumference to further enhance the sealing performance.

[0029] Preferably, the magnetic material of the magnetic coupling 4 is samarium cobalt, which can withstand high temperatures of 240° C. The relative torque will be reduced by about 10% under the same specifications, which is beneficial to the driving of the motor main shaft 31 to the stirring shaft 5 .

[0030] When in use, the magnetic coupling 4 is composed of an outer magnetic circuit 41 and an inner magnetic circuit 42, wherein the outer magnetic circuit 41 is connected to the motor 3. The use of the magnetic coupling 4 realizes contactless transmission between the motor 3 and the stirring shaft 5. The motor 3 drives the stirring shaft 5 to rotate by magnetic force, and then the stirring fan rotates. The gas will still leak from the cabin 2. There are two leakage directions, one direction is in the inner magnetic circuit 42 of the magnetic coupling 4, and the other direction is between the magnetic coupling 4 and the fixed seat 1 of the motor 3. However, since the O-ring and the inner magnetic circuit 42 of the magnetic coupling 4 are closed, the gas is still connected to the cabin 2 and will not leak out.

[0031] Above, refer to Figures 1 to 3 The invention describes a circulating stirring device in an environmental chamber according to an embodiment of the utility model, which adopts a fully welded method to connect the motor 3 fixing seat 1 and the chamber body 2, and adopts a magnetic coupling 4 to achieve contactless transmission. This design avoids the wear problem of moving parts that is inevitable in traditional mechanical seals, and eliminates the leakage problem caused by continuous wear of through holes and gaskets, thereby greatly improving the air tightness of the environmental chamber and improving the stability and reliability of the system. The gaskets in the traditional sealing method need to be replaced regularly to maintain air tightness, which increases maintenance costs and manpower investment, while the magnetic coupling 4 and O-ring design in the technical solution are more durable, reducing the need for frequent replacement and maintenance, reducing maintenance costs, and extending the service life of the equipment.

[0032] And an environmental chamber, comprising the environmental chamber internal circulation stirring device of the first embodiment. The traditional dynamic seal is replaced by an O-ring disposed between the magnetic coupling 4 and the environmental chamber body 2, which is a static part with better sealing effect, thus avoiding leakage of substances in the chamber.

[0033] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means two or more than two; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “top”, and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0035] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A circulating stirring device in an environmental chamber, used for stirring substances in the environmental chamber, wherein the environmental chamber comprises a chamber body, and the chamber body is provided with a through hole, characterized in that: Include: A fixing seat, the fixing seat is arranged outside the cabin body and covers the through hole, and the connection between the fixing seat and the cabin body is sealed; A magnetic coupling, the magnetic coupling being arranged at one end of the fixing seat away from the cabin, the magnetic coupling comprising an external magnetic circuit and an internal magnetic circuit, the external magnetic circuit being connected to the motor; A stirring shaft, one end of which extends into the cabin through the through hole, and the other end of which is inserted into the inner magnetic circuit.

2. The circulating stirring device in the environmental chamber according to claim 1, characterized in that: The connection between the fixing seat and the cabin body is sealed by welding.

3. The circulating stirring device in the environmental chamber according to claim 2, characterized in that: The motor and the magnetic coupling are fixed via a connecting piece, and the motor comprises a motor main shaft, which is inserted into the external magnetic circuit.

4. The circulating stirring device in the environmental chamber according to claim 2, characterized in that: The magnetic coupling is outer-mounted with a sealing cover.

5. The circulating stirring device in the environmental chamber according to claim 4, characterized in that: The motor is arranged in the sealing cover, and an open end of the sealing cover faces the fixing seat and is connected to the fixing seat.

6. The circulating stirring device in the environmental chamber according to claim 4, characterized in that: The sealing cover is bell-shaped and has openings at both ends. One end close to the cabin body is connected to the fixing seat, and the other end away from the cabin body is connected to the motor.

7. The circulating stirring device in the environmental chamber according to claim 5 or 6, characterized in that: One end of the sealing cover connected to the fixing seat has an end surface, a groove is provided on the end surface, and a sealing gasket is provided in the groove.

8. The circulating stirring device in the environmental chamber according to claim 7, characterized in that: The end surface is annular, the groove is an annular groove, and the sealing gasket is an O-ring.

9. The circulating stirring device in the environmental chamber according to claim 1, characterized in that: The magnetic material of the magnetic coupling is samarium cobalt.

10. An environmental chamber, characterized in that: The invention comprises the internal circulation stirring device of any one of claims 1 to 9.

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