Mounting structure of filter membrane and air particulate matter sampler

Abstract

The utility model provides a filter membrane mounting structure and an air particulate matter sampler, comprising a mounting base provided with a mounting cavity; the supporting boss is arranged in the mounting cavity, the supporting boss and the mounting base are arranged in a spaced mode, and a mounting gap is formed between the supporting boss and the mounting base; the filter membrane clamp is separably arranged on the mounting base and is used for pressing the filter membrane on the supporting boss and enabling the edge of the filter membrane to extend into the mounting gap; the buckle assembly comprises a plurality of first clamping parts arranged on the inner wall of the mounting cavity at intervals and a plurality of second clamping parts arranged on the circumferential surface of the filter membrane clamp at intervals, and the first clamping parts and the second clamping parts are clamped in a one-to-one correspondence mode. The technical problem that a traditional filter membrane is low in installation efficiency is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of samplers, in particular to an installation structure of a filter membrane and an air particulate matter sampler. Background Art

[0002] The sampling device can enable air to enter a cutter therein at a certain flow rate, and particulate matters will pass through an impact orifice plate along with the air and are finally intercepted by a filter membrane arranged at the outlet of the cutter, thus realizing sampling. Therefore, it is necessary to load or replace a new filter membrane before each sampling to reduce sampling errors. The sampling devices on the market usually install the filter membrane at the outlet of the cutter by means of bolt fixation, and a specific tool is required for replacement, which increases the replacement time. Content of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides an installation structure of a filter membrane and an air particulate matter sampler to solve the technical problem of low installation efficiency of traditional filter membranes in related technologies.

[0004] The utility model provides an installation structure of a filter membrane, including:

[0005] An installation base provided with an installation cavity;

[0006] A support boss is arranged in the installation cavity, and the support boss is spaced from the installation base, and an installation gap is formed therebetween;

[0007] A filter membrane clamp is detachably arranged on the installation base for pressing the filter membrane against the support boss and making its edge extend into the installation gap;

[0008] A buckle assembly includes a plurality of first clamping parts arranged at intervals on the inner wall of the installation cavity and a plurality of second clamping parts arranged at intervals on the peripheral surface of the filter membrane clamp, and the plurality of first clamping parts are correspondingly clamped with the plurality of second clamping parts one by one.

[0009] Further, the first clamping part includes a buckle, the second clamping part includes a clamping hole, and the buckle extends towards the filter membrane clamp and is clamped in the clamping hole.

[0010] Further, the first clamping part further includes a groove surrounding the buckle, the second clamping part further includes a protrusion for hiding the clamping hole, and the protrusion extends into the groove separately.

[0011] Further, one of the groove and the protrusion is provided with a friction part for friction contact with the other.

[0012] Furthermore, the installation gap is of an annular structure, the filter membrane clamp has a circular opening, the circular opening is concentric with the installation gap, and its inner surface is in clearance fit with the outer surface of the support boss.

[0013] Furthermore, the support boss is provided with a plurality of ventilation holes.

[0014] Furthermore, a connection base is sleeved outside the installation base, a plurality of elastic pieces are arranged at intervals on the outer surface of the installation base, a plurality of limiting openings are arranged at intervals on the inner surface of the connection base, and the plurality of elastic pieces are respectively and correspondingly clamped with the plurality of limiting openings.

[0015] Furthermore, a first step surface is arranged on the outer surface of the installation base, a second step surface is arranged on the inner surface of the connection base, and the first step surface is in fit with the second step surface.

[0016] Furthermore, a washer is arranged between the first step surface and the second step surface.

[0017] The present utility model also provides an air particulate matter sampler, which includes the installation structure of the filter membrane described above.

[0018] Compared with the prior art, the present utility model has the following beneficial effects: The installation cavity formed by the installation base can fixedly support the protrusion, so that the outer surface of the protrusion is spaced from the inner surface of the installation base to form an installation gap; through the separable connection between the filter membrane clamp and the installation base, the filter membrane can be pressed against the surface of the support protrusion, and the edge of the filter membrane can extend into the installation gap to fit with the outer surface of the support protrusion, increasing the contact area between the filter membrane and the support boss, enabling the filter membrane to stay on the support protrusion and avoiding the situation of filter membrane displacement during installation or collection; at the same time, the clamping connection mode of the first clamping part and the second clamping part can replace the traditional bolt fixing mode, which is beneficial to achieving the purpose of quick disassembly and quick assembly of the installation base and the filter membrane clamp. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the installation structure of the filter membrane in an embodiment of the present utility model;

[0020] Figure 2 It is an exploded view of the installation structure of the filter membrane in an embodiment of the present utility model;

[0021] Figure 3 It is a schematic structural diagram of the filter membrane clamp in an embodiment of the present utility model.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 1. Installation base; 2. Support boss; 201. Ventilation hole; 3. Installation gap; 4. Filter membrane clip; 401. Circular opening; 5. Snap fastener; 6. Snap hole; 7. Groove; 8. Protrusion; 9. Friction part; 10. Connection base; 11. Elastic piece; 12. Limit port; 13. First step surface; 14. Second step surface; 15. Washer.

[0024] The realization of the purpose, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0025] In order to make the purpose, technical solutions and beneficial effects of the present utility model more clear and understandable, the technical solutions in the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] In the embodiment of the present utility model, as Figure 1 - Figure 2 shown, the installation structure of the filter membrane includes: an installation base 1, a support boss 2, a filter membrane clip 4 and a snap fastener 5 assembly; the installation base 1 is provided with an installation cavity; the support boss 2 is arranged in the installation cavity, the support boss 2 and the installation base 1 are arranged at intervals, and an installation gap 3 is formed therebetween; the filter membrane clip 4 is detachably arranged on the installation base 1 for pressing the filter membrane against the support boss 2 and making its edge extend into the installation gap 3; the snap fastener 5 assembly includes a plurality of first clamping parts arranged at intervals on the inner wall of the installation cavity and a plurality of second clamping parts arranged at intervals on the peripheral surface of the filter membrane clip 4, and the plurality of first clamping parts and the plurality of second clamping parts are clamped correspondingly one by one.

[0027] Specifically, in the embodiment of the present utility model, the installation base 1 forms an installation cavity with an upward opening for fixing the support boss 2, making the upper surface of the support boss 2 flush with the upper surface of the installation base 1, and making the outer surface of the support boss 2 and the inner surface of the installation base 1 (i.e., the inner wall of the installation cavity) arranged at intervals, so as to form an installation gap 3 between the installation base 1 and the support boss 2; the filter membrane clip 4 is detachably installed on the installation base 1, so that this structure has an installation state for fixing the filter membrane and an unfolded state for releasing the filter membrane. In the installation state, the filter membrane clip 4 is fixed at the installation base 1, so that the filter membrane therebetween can be pressed against the support boss 2. Since the area of the filter membrane is larger than the area of the upper surface of the support boss 2, there is enough margin for the edge of the pressed filter membrane to follow the filter membrane clip 4 into the above-mentioned installation gap 3, so that this margin can contact the outer surface of the support boss 2, and the filter membrane is installed and fixed at the support boss 2 by increasing the contact area between the filter membrane and the support boss 2, avoiding the situation of displacement of the filter membrane during installation and collection.

[0028] In the embodiment of the present utility model, in order to achieve the separable connection between the mounting base 1 and the filter membrane clip 4, a buckle 5 assembly is provided. The first clamping portion and the second clamping portion of the buckle 5 assembly are respectively formed on the opposite end faces of the mounting base 1 and the filter membrane clip 4, and the corresponding two clamping portions are clamped to replace the original bolt fixing method, thereby improving the installation and removal efficiency of the filter membrane.

[0029] In this embodiment, by pressing the filter membrane into the support boss 2 and the installation gap 3, the contact area between the filter membrane and the support boss 2 is increased. The filter membrane can be fixed at the support boss 2 by means of frictional contact to prevent its displacement; combined with the setting of the buckle 5 assembly, the filter membrane can be further fixed at the support boss 2; at the same time, the separable connection method is adopted to improve the installation and removal efficiency of the filter membrane.

[0030] As Figure 2 described, in one embodiment, the first clamping portion includes a buckle 5, the second clamping portion includes a clamping hole 6, and the buckle 5 extends towards the filter membrane clip 4 and is clamped in the clamping hole 6. Specifically, in order to achieve the clamping connection method of the two clamping portions, in this embodiment, the first clamping portion is defined as a buckle 5, the second clamping portion is defined as a clamping hole 6, and the buckle 5 and the clamping hole 6 cooperate and are clamped. It can be understood that the buckle 5 can extend into the clamping hole 6 and achieve clamping by its own elasticity or toughness. On the other hand, since there is a certain air flow rate during collection, keeping the cooperation direction of the buckle 5 and the clamping hole 6 consistent with the air flow rate can improve the stability of the filter membrane clip 4.

[0031] Furthermore, as Figure 2 、 Figure 3 shown, in one embodiment, the first clamping portion further includes a groove 7 provided around the buckle 5, the second clamping portion further includes a protrusion 8 for hiding the clamping hole 6, and the protrusion 8 separately extends into the groove 7. Specifically, in order to further improve the structural stability of the mounting base 1 and the filter membrane clip 4 and enable the buckle 5 and the clamping hole 6 to correspond to each other, a matching groove 7 and protrusion 8 are also provided on the opposite end faces of the mounting base 1 and the filter membrane clip 4. The groove 7 is used to surround the buckle 5 and serves as an avoidance function; the clamping hole 6 is hidden in the protrusion 8, which plays a role in protecting the clamping hole 6 and can also play a role in dust prevention for the clamping hole 6 after installation; of course, the protrusion 8 can move together with the filter membrane clip 4, so that the protrusion 8 can separately extend into the groove 7, which plays a guiding role for the buckle 5 and the clamping hole 6 and can also prevent the filter membrane clip 4 from rotating axially.

[0032] Preferably, as Figure 3As shown, one of the groove 7 and the protrusion 8 is provided with a friction part 9 for frictional contact with the other. In this embodiment, the friction part 9 is arranged on the surface of the protrusion 8, and at least part of the friction part 9 is a corrugated structure for frictional contact with the inner wall of the groove 7, so as to increase the frictional force to improve the stability of the filter membrane clamp 4. Of course, in other embodiments, the friction part 9 can also be arranged on the inner wall of the groove 7, or friction parts 9 are additionally arranged on both the inner wall of the groove 7 and the outer surface of the protrusion 8, which is not limited herein.

[0033] As Figure 2 shown, in one embodiment, the installation gap 3 is an annular structure, the filter membrane clamp 4 has a circular opening 401, the circular opening 401 is concentric with the installation gap 3, and its inner surface is in clearance fit with the outer surface of the support boss 2. Specifically, in order to press the filter membrane tightly on the support boss 2 and enable its edge to extend into the installation gap 3, in this embodiment, the installation gap 3 is defined as an annular structure, and the circular opening 401 of the filter membrane clamp 4 is concentric with the installation gap 3. In this way, the filter membrane clamp 4 can be entirely inserted into the installation gap 3, so that the filter membrane therein can be firmly pressed at the support boss 2. Of course, the inner surface of the circular opening 401 of the filter membrane clamp 4 is in clearance fit with the outer surface of the support boss 2 for placing the filter membrane, so that both surfaces of the filter membrane are in contact with the above-mentioned filter membrane clamp 4 and support boss 2 respectively, and the increased frictional force locks the filter membrane on the support boss 2.

[0034] As Figure 2 shown, the support boss 2 is provided with a plurality of ventilation holes 201. On the one hand, it can be used to shield the particulate matter passing through the filter membrane to protect the equipment. On the other hand, it can enable the air to have a certain flow rate during the operation of the equipment and flow towards the filter membrane.

[0035] As Figure 1 、 Figure 2 shown, in one embodiment, a connection base 10 is sleeved outside the installation base 1. A plurality of elastic pieces 11 are arranged at intervals on the outer surface of the installation base 1, and a plurality of limiting ports 12 are arranged at intervals on the inner surface of the connection base 10. The plurality of elastic pieces 11 are respectively clamped with the plurality of limiting ports 12. Specifically, in order to install and fix the installation base 1 at the equipment body, in this embodiment, the connection base 10 is used to detachably connect the two. On the one hand, it is convenient for loading and unloading the filter membrane. On the other hand, it is also convenient to place the installation base 1 together with the new filter membrane in the dust-proof box when not in use to prevent pollution.

[0036] In addition, to position the mounting base 1 and prevent it from rotating axially within the connecting base 10, in this embodiment, a plurality of elastic pieces 11 are provided on the outer surface of the mounting base 1, and a plurality of limiting ports 12 are provided on the inner surface of the connecting base 10. The elastic pieces 11 have a certain elasticity and are clamped in the limiting ports 12 when passing through the limiting ports 12, so as to achieve the purpose of restricting the movement of the mounting base 1. Of course, since there is a certain gap after the limiting port 12 is clamped with the elastic piece 11, in order to improve the sealing performance of the connecting base 10, an elastic sleeve can be sleeved at the limiting port 12. The elastic sleeve can cover the above gap, playing a sealing role and not interfering with manually pressing the elastic piece 11 at the same time.

[0037] As Figure 2 shown, in one embodiment, a first stepped surface 13 is provided on the outer surface of the mounting base 1, and a second stepped surface 14 is provided on the inner surface of the connecting base 10. The first stepped surface 13 is attached to the second stepped surface 14. Specifically, in order to place the mounting base 1 within the connecting base 10 and position the elastic piece 11 so that it can enter the corresponding limiting port 12, in this embodiment, mating stepped surfaces are provided on the inner and outer surfaces of the two bases, and the position of the elastic piece 11 within the limiting port 12 is positioned by the limitation of the stepped surfaces, while also improving the sealing performance between the two bases. Preferably, a gasket 15 can be provided directly between the two stepped surfaces to further improve the sealing performance between the two.

[0038] This embodiment also provides an air particulate sampler, including the above-described mounting structure. The specific structure of this mounting structure refers to the above embodiment. Since this sampler adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated here one by one. Of course, in order to make this sampler suitable for outdoor operations, it can be a battery-powered model.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. Installation structure of filter membrane, characterized in that, Comprising: An installation base provided with an installation cavity; A support boss provided in the installation cavity, the support boss being spaced apart from the installation base, and an installation gap being formed therebetween; A filter membrane clip detachably provided on the installation base for pressing the filter membrane against the support boss and extending its edge into the installation gap; A buckle assembly including a plurality of first clamping portions spaced apart on the inner wall of the installation cavity and a plurality of second clamping portions spaced apart on the circumferential surface of the filter membrane clip, and the plurality of first clamping portions and the plurality of second clamping portions are clamped in one-to-one correspondence.

2. The mounting structure of the filter membrane according to claim 1, characterized in that, The first clamping portion includes a buckle, the second clamping portion includes a clamping hole, and the buckle extends towards the filter membrane clip and is clamped in the clamping hole.

3. The installation structure of the filter membrane according to claim 2, characterized in that, The first clamping portion further includes a groove provided around the buckle, the second clamping portion further includes a protrusion for hiding the clamping hole, and the protrusion is detachably inserted into the groove.

4. The mounting structure of the filter membrane according to claim 3, characterized in that One of the groove and the protrusion is provided with a friction portion for friction contact with the other.

5. The installation structure of the filter membrane according to any one of claims 1-4, characterized in that, The installation gap is of an annular structure, the filter membrane clip has a circular opening, the circular opening is concentric with the installation gap, and its inner surface is in clearance fit with the outer surface of the support boss.

6. The installation structure of the filter membrane according to claim 1, characterized in that, The support boss is provided with a plurality of ventilation holes.

7. The installation structure of the filter membrane according to claim 1, characterized in that A connection base is sleeved outside the installation base, a plurality of elastic pieces are spaced apart on the outer surface of the installation base, and a plurality of limiting ports are spaced apart on the inner surface of the connection base, and the plurality of elastic pieces and the plurality of limiting ports are clamped in one-to-one correspondence.

8. The installation structure of the filter membrane according to claim 7, characterized in that, The outer surface of the installation base is provided with a first step surface, the inner surface of the connection base is provided with a second step surface, and the first step surface is in fit with the second step surface.

9. The mounting structure of the filter membrane according to claim 8, characterized in that, A washer is provided between the first step surface and the second step surface.

10. An air particulate sampler, characterized in that, An installation structure for a filter membrane as described in any one of claims 1-9.

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