Filtering and flow limiting device

Abstract

The utility model relates to the technical field of ambient air detection, and discloses a filtering and flow limiting device which comprises a cylindrical cavity shell, a filter element, a filter element and a flow limiting device. The connecting structure comprises a second limiting groove, and the second limiting groove is formed in the cavity shell; the sealing structure comprises a hexagonal sleeve, and the hexagonal sleeve is arranged outside the cavity shell; the filtering structure comprises a filtering module, and the filtering module is arranged outside the cavity shell; the flow limiting structure comprises a flow limiting module, and the flow limiting module is arranged outside the cavity shell, so that the purpose of modular installation of the device is achieved, the installation flexibility of the device is improved, the problem of low matching use flexibility of the device is solved, and the installation mode of the device is improved; the filters and the flow limiters of different specifications are integrated and matched for use, so that the aim of multiple purposes is fulfilled, the cleaning and the maintenance are easy, the cost is reduced, and the repeated utilization is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of ambient air detection, and specifically relates to a filtering and current-limiting device. Background Art

[0002] In multiple fields such as ambient air monitoring, industrial process control, and laboratory analysis, various instruments and meters have extremely strict requirements for the treatment of sample gas. Due to the different design principles, application scenarios, and measurement accuracy requirements of different instruments and meters, they often have very different requirements for the filtering accuracy and current-limiting magnitude of the sample gas.

[0003] The filtering accuracy and current-limiting magnitude of the sample gas for different instruments and meters are inconsistent. Therefore, it is often necessary to prepare various specifications and types of related accessories. Moreover, the filtering and current-limiting alone occupy a large installation space, affecting the internal layout of the instrument, and the flexibility of the device combination is low. The device is inconvenient to use. Traditional filters and current-limiting holes are not easy to maintain and clean, and are mostly disposable finished products, resulting in high maintenance costs.

[0004] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0005] In order to solve the technical problem of low flexibility in the combined use of the above-mentioned device, the basic concept of the technical solution adopted by the present utility model is as follows:

[0006] A filtering and current-limiting device, comprising:

[0007] A cavity housing, the cavity housing is cylindrical;

[0008] A connection structure, the connection structure includes a second limiting groove, and the second limiting groove is opened inside the cavity housing;

[0009] A sealing structure, the sealing structure includes a hexagonal sleeve, and the hexagonal sleeve is arranged outside the cavity housing;

[0010] A filtering structure, the filtering structure includes a filtering module, and the filtering module is arranged outside the cavity housing;

[0011] A current-limiting structure, the current-limiting structure includes a current-limiting module, and the current-limiting module is arranged outside the cavity housing.

[0012] As a preferred implementation manner of the present utility model, the connection structure further includes a third limiting groove opened inside the cavity housing. The top of the hexagonal sleeve is fixedly installed with a second cavity end cover, the top of the second cavity end cover is fixedly installed with a third cavity end cover, the bottom of the hexagonal sleeve is fixedly installed with a first cavity end cover, and a first ventilation groove is opened inside the third cavity end cover and the first cavity end cover.

[0013] As a preferred embodiment of the present utility model, the connection structure further includes a first fixed sleeve fixedly installed on the top of the current-limiting module. The top of the filtering module is in close contact with the inner top of the second limiting groove, the bottom of the filtering module is in close contact with the top of the first fixed sleeve, and the bottom of the current-limiting module is in close contact with the top of the third cavity end cover.

[0014] As a preferred embodiment of the present utility model, the sealing structure further includes a first rubber ring sleeved and installed on the outer wall of the third cavity end cover, a second rubber ring sleeved and installed on the outer wall of the current-limiting module, and a third rubber ring sleeved and installed on the outer wall of the filtering module. The outer walls of the first rubber ring, the second rubber ring and the third rubber ring are all in close contact with the inner wall of the second limiting groove.

[0015] As a preferred embodiment of the present utility model, the filtering structure further includes a filtering groove opened on the top of the filtering module. A second ventilation groove is opened inside the filtering module, and one end of the second ventilation groove is communicated with the filtering groove.

[0016] As a preferred embodiment of the present utility model, the current-limiting structure further includes a first current-limiting groove opened inside the current-limiting module, and the first current-limiting groove is communicated with the first fixed sleeve.

[0017] As a preferred embodiment of the present utility model, a first limiting groove is opened inside the cavity housing. The first limiting groove is arranged on the top of the second limiting groove and is communicated with the second limiting groove. An anti-corrosion coating is applied on the outer walls of the first limiting groove, the second limiting groove and the third limiting groove. A moisture-proof coating is applied on the surface of the anti-corrosion coating, and an anti-rust coating is applied on the surface of the moisture-proof coating.

[0018] The present utility model has the following beneficial effects compared with the prior art:

[0019] 1. The purpose of modular installation of the device is achieved, the flexibility of device installation is improved, the problem of low flexibility in the combined use of devices is solved, the installation method of the device is improved. By making a carrier structure, filters and current limiters of different specifications are integrated and used in combination to achieve the purpose of multiple uses, which is easy to clean and maintain, reduces costs, and can be reused.

[0020] 2. The purpose of sealing the device is achieved. Filtering modules and current-limiting modules with different hole sizes are selected according to needs, which improves the convenience of device use and optimizes the use experience of the device.

[0021] 3. The purpose of providing multiple protections for the device is achieved. The protection scope includes anti-corrosion, moisture-proof and anti-rust protection, which improves the durability of the device, extends the service life of the device, and improves the use safety of the device.

[0022] The following further describes the specific embodiments of the present utility model in detail with reference to the accompanying drawings. Brief Description of the Drawings

[0023] In the drawings:

[0024] Figure 1 is the front view of the present utility model;

[0025] Figure 2 is the cross-sectional view of the present utility model;

[0026] Figure 3 is the schematic diagram of the module of the present utility model;

[0027] Figure 4 is the cross-sectional view of the cavity housing of the present utility model;

[0028] Figure 5 is the cross-sectional view of the second cavity end cover of the present utility model;

[0029] Figure 6 is the cross-sectional view of the current-limiting module of the present utility model;

[0030] Figure 7 is the cross-sectional view of the filtering module of the present utility model;

[0031] Figure 8 is the structure diagram of the coating layer of the present utility model.

[0032] In the figure: 10, cavity housing; 11, first limiting groove; 12, second limiting groove; 13, third limiting groove; 14, hexagonal sleeve; 15, first cavity end cover; 16, second cavity end cover; 17, third cavity end cover; 18, first rubber ring; 19, first ventilation groove; 20, current-limiting module; 21, second rubber ring; 22, first current-limiting groove; 23, first fixing sleeve; 24, filtering module; 25, third rubber ring; 26, filtering groove; 27, second ventilation groove; 28, anti-rust coating; 29, moisture-proof coating; 30, anti-corrosion coating. Detailed Description of the Preferred Embodiments

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model.

[0034] Embodiment 1: A filtering and current-limiting device, specifically as shown in Figure 1 and Figure 3As shown, it includes a cavity housing 10, and the cavity housing 10 is cylindrical; a connection structure, the connection structure includes a second limiting groove 12, and the second limiting groove 12 is opened inside the cavity housing 10; a sealing structure, the sealing structure includes a hexagonal sleeve 14, and the hexagonal sleeve 14 is arranged outside the cavity housing 10; a filtering structure, the filtering structure includes a filtering module 24, and the filtering module 24 is arranged outside the cavity housing 10; a flow-limiting structure, the flow-limiting structure includes a flow-limiting module 20, and the flow-limiting module 20 is arranged outside the cavity housing 10. The module is quickly installed through the connection structure, the sealing effect of the device is improved through the sealing structure, the gas is filtered through the filtering structure, and the flow rate of the air flow is controlled through the flow-limiting structure.

[0035] Specifically, as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the connection structure further includes a third limiting groove 13 opened inside the cavity housing 10. A second cavity end cover 16 is fixedly installed at the top of the hexagonal sleeve 14, a third cavity end cover 17 is fixedly installed at the top of the second cavity end cover 16, a first cavity end cover 15 is fixedly installed at the bottom of the hexagonal sleeve 14, and a first ventilation groove 19 is opened inside the third cavity end cover 17 and the first cavity end cover 15. Hold the first cavity end cover 15 and push the hexagonal sleeve 14 to snap the second cavity end cover 16 into the inside of the third limiting groove 13 and snap the third cavity end cover 17 into the inside of the second limiting groove 12.

[0036] Specifically, as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the connection structure also includes a first fixing sleeve 23 fixedly mounted on the top of the flow limiting module 20, the top of the filter module 24 is in close contact with the inner top of the second limiting groove 12, the bottom of the filter module 24 is in close contact with the top of the first fixing sleeve 23, and the bottom of the flow limiting module 20 is in close contact with the top of the third cavity end cover 17. The filter module 24 and the flow limiting module 20 are sequentially placed inside the second limiting groove 12, so that the top of the filter module 24 is in close contact with the inner top of the second limiting groove 12, the bottom of the filter module 24 is in close contact with the top of the first fixing sleeve 23, and the bottom of the flow limiting module 20 is in close contact with the top of the third cavity end cover 17. According to the above conclusions, through the structure of the third limiting groove 13, the hexagonal sleeve 14, the first cavity end cover 15, the second cavity end cover 16, the third cavity end cover 17, the flow limiting module 20, the first fixed sleeve 23 and the filter module 24, the purpose of modular installation of the device is achieved, the flexibility of the installation of the device is improved, the problem of low flexibility in the use of the device is solved, the installation method of the device is improved, and by making a carrier structure, filters and flow limiters of different specifications are integrated and used in combination to achieve the purpose of multiple uses, easy cleaning and maintenance, low cost, and reusable.

[0037] Example 2: Based on Example 1, the specific example is as follows Figure 2 、 Figure 3 、 Figure 5 and Figure 7 As shown, the sealing structure also includes a first rubber ring 18 sleeved and mounted on the outer wall of the third cavity end cap 17, a second rubber ring 21 sleeved and mounted on the outer wall of the flow limiting module 20, and a third rubber ring 25 sleeved and mounted on the outer wall of the filter module 24. The outer walls of the first rubber ring 18, the second rubber ring 21, and the third rubber ring 25 are all tightly attached to the inner wall of the second limiting groove 12. Sleeving the first rubber ring 18 on the outer wall of the third cavity end cap 17, the second rubber ring 21 on the outer wall of the flow limiting module 20, and the third rubber ring 25 on the outer wall of the filter module 24 ensure that the outer walls of the first rubber ring 18, the second rubber ring 21, and the third rubber ring 25 are tightly attached to the interior of the second limiting groove 12, thereby improving the limiting and sealing effects of the device.

[0038] Specific as Figure 4 and Figure 7 As shown, the filter structure further includes a filter tank 26 provided at the top of the filter module 24. A second ventilation tank 27 is provided inside the filter module 24, and one end of the second ventilation tank 27 is connected to the filter tank 26. The filter tank 26 and the second ventilation tank 27 convey the airflow and filter large particles of impurities in the gas.

[0039] Specific as Figure 4 and Figure 6As shown, the current-limiting structure further includes a first current-limiting groove 22 formed inside the current-limiting module 20, and the first current-limiting groove 22 communicates with the first fixed sleeve 23. The airflow is conveyed through the first current-limiting groove 22 and the first fixed sleeve 23 to adjust the airflow velocity. Both the filtering structure and the current-limiting structure are modular structures. Threads are tapped on the end faces of the filtering module and the current-limiting hole module respectively, which facilitates disassembly and assembly from the cavity housing using professional tools, and their main body sizes remain unchanged. The holes of the current-limiting module and the filtering module can be customized according to the flow rate requirements and filtering accuracy. Replacement modules with multiple groups of different sizes of filtering holes and current-limiting holes are designed according to needs. The three rubber rings are O-ring seals. Threads for screwing are tapped inside the cavity housing and outside the cavity end cover. A first rubber ring is attached to the cavity end cover. When the two are screwed together, the overall sealing structure can be satisfied.

[0040] Based on the above, through the structures of the third cavity end cover 17, the first rubber ring 18, the current-limiting module 20, the second rubber ring 21, the first current-limiting groove 22, the first fixed sleeve 23, the filtering module 24, the third rubber ring 25, the filtering groove 26 and the second ventilation groove 27, the purpose of sealing the device is achieved. Filtering modules and current-limiting modules with different hole sizes are selected according to needs, which improves the convenience of using the device and optimizes the user experience of the device.

[0041] Embodiment 3: On the basis of Embodiment 1 and Embodiment 2, specifically as Figure 1 、 Figure 2 and Figure 8 shown, a first limiting groove 11 is formed inside the cavity housing 10. The first limiting groove 11 is arranged at the top of the second limiting groove 12, and the first limiting groove 11 communicates with the second limiting groove 12. An anti-corrosion coating 30 is applied to the outer walls of the first limiting groove 11, the second limiting groove 12 and the third limiting groove 13. A moisture-proof coating 29 is applied to the surface of the anti-corrosion coating 30, and an anti-rust coating 28 is applied to the surface of the moisture-proof coating 29. The device is protected against corrosion through the anti-corrosion coating 30, protected against moisture through the moisture-proof coating 29, and protected against rust through the anti-rust coating 28.

[0042] In summary, through the structures of the anti-rust coating 28, the moisture-proof coating 29 and the anti-corrosion coating 30, the purpose of providing multiple protections for the device is achieved. The protection scope includes anti-corrosion, moisture-proof and anti-rust protections, which improves the durability of the device, extends the service life of the device, and enhances the use safety of the device.

[0043] Working principle: A plurality of limiting grooves (a second limiting groove 12, a third limiting groove 13 and an optional first limiting groove 11) are provided inside the cavity shell 10 for fixing and positioning different modules. Hold the first cavity end cover 15 and push the hexagonal sleeve 14 to snap the second cavity end cover 16 into the third limiting groove 13. At the same time, the third cavity end cover 17 is snapped into the second limiting groove 12 to achieve quick connection between the module and the cavity shell. This design simplifies the installation process and improves the installation efficiency. The first rubber ring 18, the second rubber ring 21 and the third rubber ring 25 are respectively sleeved on the outer walls of the third cavity end cover 17, the flow limiting module 20 and the filter module 24 to ensure that these modules are tightly fitted with the inner wall of the second limiting groove 12, thereby improving the sealing effect of the device and preventing gas leakage. A filter groove 26 is provided on the top of the filter module 24, and a second ventilation groove 27 is provided inside. The two are connected. When the gas passes through the filter groove 26, large particles of impurities are intercepted, and the clean gas continues to flow through the second ventilation groove 27, effectively removing large particles of impurities in the gas and protecting subsequent equipment from damage. The flow limiting module 20 A first flow limiting groove 22 is provided inside and is connected to the first fixed sleeve 23. By adjusting the size or shape of the first flow limiting groove 22, the flow rate of the airflow can be controlled to meet the airflow requirements of different instruments. An anti-corrosion coating 30, a moisture-proof coating 29 and an anti-rust coating 28 are applied on the outer wall of the limit groove of the cavity shell 10, which effectively prevents the device from corrosion, moisture and rust caused by environmental factors and extends the service life of the device. The filtering structure and the flow limiting structure adopt a modular design. The filter holes and flow limiting hole replacement modules of different sizes can be replaced as needed to adapt to different application scenarios and precision requirements. They are easy to clean and maintain, reduce costs, and are reusable.

[0044] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A filtering and current limiting device, characterized in that: include: The cavity shell (10) is cylindrical; A connecting structure, the connecting structure comprising a second limiting groove (12), the second limiting groove (12) being provided inside the cavity housing (10); A sealing structure, comprising a hexagonal sleeve (14), the hexagonal sleeve (14) being arranged outside the cavity housing (10); A filtering structure, the filtering structure comprising a filtering module (24), the filtering module (24) being arranged outside the cavity housing (10); The current limiting structure comprises a current limiting module (20), and the current limiting module (20) is arranged outside the cavity shell (10).

2. The filtering flow limiting device according to claim 1, characterized in that: The connection structure further comprises a third limiting groove (13) provided inside the cavity housing (10); a second cavity end cover (16) is fixedly mounted on the top of the hexagonal sleeve (14); a third cavity end cover (17) is fixedly mounted on the top of the second cavity end cover (16); a first cavity end cover (15) is fixedly mounted on the bottom of the hexagonal sleeve (14); and a first vent groove (19) is provided inside the third cavity end cover (17) and the first cavity end cover (15).

3. The filtering and flow limiting device according to claim 1, characterized in that: The connection structure further comprises a first fixed sleeve (23) fixedly mounted on the top of the flow limiting module (20); the top of the filter module (24) is in close contact with the inner top of the second limiting groove (12); the bottom of the filter module (24) is in close contact with the top of the first fixed sleeve (23); and the bottom of the flow limiting module (20) is in close contact with the top of the third cavity end cover (17).

4. The filtering flow limiting device according to claim 1, characterized in that: The sealing structure further comprises a first rubber ring (18) sleeved and mounted on the outer wall of the third cavity end cover (17), a second rubber ring (21) sleeved and mounted on the outer wall of the flow limiting module (20), and a third rubber ring (25) sleeved and mounted on the outer wall of the filter module (24); the outer walls of the first rubber ring (18), the second rubber ring (21), and the third rubber ring (25) are all in close contact with the inner wall of the second limiting groove (12).

5. The filtering and flow limiting device according to claim 1, characterized in that: The filtering structure further comprises a filtering tank (26) provided on the top of the filtering module (24); a second ventilation tank (27) is provided inside the filtering module (24); one end of the second ventilation tank (27) is connected to the filtering tank (26).

6. The filtering and flow limiting device according to claim 1, characterized in that: The flow limiting structure further comprises a first flow limiting groove (22) provided inside the flow limiting module (20), and the first flow limiting groove (22) is connected to the first fixed sleeve (23).

7. The filtering and flow limiting device according to claim 1, characterized in that: A first limiting groove (11) is provided inside the cavity shell (10), the first limiting groove (11) is arranged on the top of the second limiting groove (12), the first limiting groove (11) and the second limiting groove (12) are connected, and an anti-corrosion coating (30) is applied on the outer walls of the first limiting groove (11), the second limiting groove (12) and the third limiting groove (13), the surface of the anti-corrosion coating (30) is applied with a moisture-proof coating (29), and the surface of the moisture-proof coating (29) is applied with an anti-rust coating (28).

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