Aluminum foil ring pressing device of filter membrane sampling head assembly

Abstract

The utility model discloses an aluminum foil ring press-fit device of a filter membrane sampling head assembly, the press-fit device is annularly coated on an XY plane, radially extruded and pressed and coated outside an aluminum foil ring of the filter membrane sampling head assembly in a Z direction, and the press-fit device comprises a press head and a press seat which are coaxially matched for stamping; a filter membrane sampling head assembly is placed in the middle of the top surface of the pressing seat in a Z direction, and the periphery of the top surface of the pressing seat radially slides on an XY plane and elastically supports a plurality of fan-shaped pressing blocks which jointly surround the periphery of the filter membrane sampling head assembly; the bottom of the pressing head is open, the pressing head is axially inserted into the pressing base, a plurality of slope ring grooves for providing radial pressing power for the fan-shaped pressing blocks are formed in the circumferential inner wall of the pressing head, and a hollow pressing cylinder for pressing the aluminum foil ring in the Z direction is coaxially connected to the middle of the pressing head in an inserted mode. The device can realize standardized stamping installation of the aluminum foil ring on the filter membrane sampling head assembly, so that the deformation of the aluminum foil ring is more uniform, the combination installation quality of the filter membrane sampling head assembly is ensured, and the edge leakage of a sampling head is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a filter membrane sampling head assembly's aluminium foil ring pressing device belongs to the technical field of smoke dust sampling and weighing. BACKGROUND

[0002] As the common component of flue gas environment detection, low concentration particulate matter sampling head has been widely used, the existing sampling head is mostly composed of elbow, arc pressing plate, filter membrane and metal drag net, the outside of the sampling head is covered and fixed by an aluminium foil ring, and the arc pressing plate, filter membrane and metal drag net are axially limited, the elbow needs to be cleaned before sampling, and the filter membrane needs to be replaced, so the aluminium foil ring needs to be frequently disassembled or re-bundled, although the hardness of the aluminium foil ring is not high due to the material of the aluminium foil ring, but the sampling personnel cannot standardize the manual compaction of the aluminium foil ring, and there is lack of special tool.

[0003] Therefore, how to design a filter membrane sampling head assembly's aluminium foil ring pressing device to realize the uniform punching deformation of the aluminium foil ring in the circumferential direction becomes a technical problem to be solved by the person skilled in the art. SUMMARY

[0004] The utility model discloses at least solve one of the prior art technical problems. For this purpose, a filter membrane sampling head assembly's aluminium foil ring pressing device, the device can realize the standardization punching installation of the aluminium foil ring on the filter membrane sampling head assembly, make the aluminium foil ring deformation more uniform, guarantee the combination installation quality of filter membrane sampling head assembly, avoid the edge leakage of sampling head.

[0005] In order to solve the above problems, the utility model provides a kind of filter membrane sampling head assembly's aluminium foil ring pressing device, and the aluminium foil ring of filter membrane sampling head assembly is covered, extruded radially and pressed in Z direction outside by pressing device in XY plane, and the pressing device includes: coaxial cooperation punch and pressure seat of stamping;

[0006] The filter membrane sampling head assembly is placed in the middle part of the top surface of the pressure seat in Z direction, and the outer periphery of the top surface of the pressure seat is radially slid and elastically supported by a plurality of sector-shaped pressing blocks collectively surrounding the outer periphery of the filter membrane sampling head assembly;

[0007] The bottom of the punch is open and inserted into the inside of the pressure seat, and a plurality of slope grooves are formed on the circumferential inner wall of the punch to provide radial pressing force for the sector-shaped pressing blocks, and a hollow pressing cylinder is coaxially inserted into the middle part of the punch to press the aluminium foil ring in Z direction.

[0008] Preferably, the top of the pressure seat is open, the outer periphery of the top surface of the pressure seat is integrally formed with an outer edge radially sleeving the outer wall of the punch, the middle part of the top surface of the pressure seat is fixedly provided with a boss protruding in Z direction and supporting the sector-shaped pressing blocks and the filter membrane sampling head assembly, and a relief groove is formed between the outer edge and the boss to provide space for the punch to press down.

[0009] Preferably, a plurality of T-shaped blocks are uniformly distributed and radially extended on the top surface of the boss; a T-shaped slot is formed on the sector-shaped pressing block and extends in the Z direction and radially; a T-shaped sliding block is constrained in the Z direction and radially slides in the T-shaped slot; a reset spring is elastically supported on one end of the inner wall of the T-shaped slot; the other end of the reset spring is elastically supported on the radial end side wall of the T-shaped sliding block; and the plurality of reset springs provide radial opening power for the plurality of sector-shaped pressing blocks.

[0010] Preferably, the radial inner periphery and the radial outer periphery of the sector-shaped pressing block are formed with arc surfaces with slopes, wherein:

[0011] The arc surface located at the radial inner periphery of the sector-shaped pressing block radially compresses the aluminum foil ring wrapped around the outer periphery of the filter membrane sampling head assembly in the XY plane;

[0012] The arc surface located at the radial outer periphery of the sector-shaped pressing block slides with the inner wall of the slope ring groove when the pressing head is pressed down, so that the plurality of sector-shaped pressing blocks perform a radial contraction action against the reset support force of the reset spring.

[0013] Preferably, the slope ring groove is provided with a plurality of channels, including a cutting-in ring groove, a radial compression ring, and a displacement ring groove, which are sequentially arranged from the open edge of the pressing head to the inside of the pressing head;

[0014] The cutting-in ring groove first contacts the outer periphery of the sector-shaped pressing block during the pressing process of the pressing head, and the annular slope inner wall of the cutting-in ring groove slides with the sector-shaped outer wall of the sector-shaped pressing block;

[0015] During the continuous downward movement of the pressing head, the radial compression ring slides against the sector-shaped outer wall of the sector-shaped pressing block, providing radial aggregation compression force for the plurality of sector-shaped pressing blocks;

[0016] When the pressing head reaches the limit position, the plurality of upward pressing blocks are radially opened to provide axial compression displacement for the hollow compression cylinder.

[0017] Compared with the prior art, the advantages of the present application are:

[0018] The aluminum foil ring compression device of the filter membrane sampling head assembly of the present application can realize the aluminum foil ring multi-section compression process of first radial pushing and then axial compression during the compression process of the pressing head to the inside of the pressing seat. During this process, the hollow compression cylinder of the pressing head provides Z-direction compression for the filter membrane sampling head assembly on the boss; the plurality of slope ring grooves of the pressing head provide staged slope pushing displacement for the sector-shaped pressing block; finally, the T-shaped sliding block fixed on the pressing seat is elastically pushed by the reset spring in the T-shaped slot of the sector-shaped pressing block, which can realize the Z-direction constraint of the sector-shaped pressing block on the boss and the radial elastic reset of the sector-shaped pressing block. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a sectional view of the utility model (the stage of separating the pressure head and the pressure seat);

[0021] Figure 2 It is a sectional view of the utility model (the first stage of stamping of the pressure head, at this time the fan-shaped pressing block starts to perform the action of pushing the aluminum foil ring radially);

[0022] Figure 3 It is a sectional view of the utility model (the second stage of stamping of the pressure head, at this time the fan-shaped pressing block is contracted radially to the limit position);

[0023] Figure 4 It is a sectional view of the utility model (the third stage of stamping of the pressure head, at this time the fan-shaped pressing block is opened radially to reset, and the hollow pressing cylinder Z stamps the aluminum foil ring);

[0024] Figure 5 It is a top view of the pressure seat in the utility model (the open posture of the fan-shaped pressing block);

[0025] Figure 6 It is a top view of the pressure seat in the utility model (the contracted posture of the fan-shaped pressing block);

[0026] Figure 7 It is Figure 5 the partial sectional view of the middle A-A section;

[0027] Figure 8 It is a structural schematic view of the filter membrane sampling head assembly stamped in the utility model (before stamping);

[0028] Figure 9 It is a structural schematic view of the filter membrane sampling head assembly stamped in the utility model (after stamping);

[0029] In the figure: 1-pressure head;2-hollow pressing cylinder;3-slope ring groove;4-outer edge;5-arc surface;6-convex platform;7-fan-shaped pressing block;8-giving way groove;9-pressure seat;10-T-shaped sliding block;11-T-shaped groove;12-reset spring;13-filter membrane sampling head assembly;14-aluminum foil ring;301-cut-in ring groove;302-radial pressing ring;303-giving way ring groove. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The utility model makes further detailed description in combination with the drawings.

[0033] The utility model discloses a kind of aluminum foil ring press fitting devices of filter membrane sampling head assembly, press fitting device is covered in ring direction on XY plane, radially extruded and Z is pressed and covered in the outside of aluminum foil ring 14 of filter membrane sampling head assembly 13, this press fitting device includes: coaxial cooperation punch press's pressure head 1 and pressure seat 9;

[0034] Pressure seat top surface middle part places filter membrane sampling head assembly in Z direction, and the outer periphery of pressure seat top surface is radially slid and elastically supported with multiple sector-shaped pressing blocks 7 that are collectively surrounded in the outer periphery of filter membrane sampling head assembly in XY plane;

[0035] Pressure head bottom is open and axially inserted into the inside of pressure seat, and multiple slope ring grooves 3 for providing radial press fitting power for sector-shaped pressing block are made on the circumferential inner wall of the pressure head, and hollow pressure cylinder 2 for Z-direction press fitting aluminum foil ring is coaxially inserted in the middle part of the pressure head.

[0036] Preferably, the top of the pressure seat is open, the outer edge 4 of the outer periphery of the top surface of the pressure seat is integrally made of a radial sleeve, the boss 6 protruding in Z direction and supporting the sector-shaped pressing block and the filter membrane sampling head assembly is fixedly arranged in the middle part of the top surface of the pressure seat, and the relief groove 8 recessed in Z direction and providing space for the pressure head is arranged between the outer edge and the boss.

[0037] Preferably, a plurality of T-shaped blocks are fixedly arranged on the top surface of the boss in circumferential direction and radially extend; a T-shaped groove 11 extending in Z direction and radially is arranged in the sector-shaped pressing block; the T-shaped block 10 is inserted and connected in Z direction and radially slides in the T-shaped groove; the inner wall of the T-shaped groove is elastically supported by a reset spring 12 at one end; the other end of the reset spring is elastically supported on the radial end side wall of the T-shaped block, and the radial opening power of the plurality of sector-shaped pressing blocks is provided by the plurality of reset springs respectively.

[0038] Preferably, the radially inner periphery and the radially outer periphery of the sector-shaped pressing block are provided with arc-shaped surfaces 5 with slopes, wherein:

[0039] The arc-shaped surface located at the radially inner periphery of the sector-shaped pressing block radially compresses the aluminum foil ring wrapped around the outer periphery of the filter membrane sampling head assembly in the XY plane;

[0040] The arc-shaped surface located at the radially outer periphery of the sector-shaped pressing block slides with the inner wall of the slope ring groove when the pressing head is pressed down, so that the plurality of sector-shaped pressing blocks perform a radial contraction action against the restoring force of the restoring spring.

[0041] Preferably, the slope ring groove is provided with a plurality of channels, including a cutting-in ring groove 301, a radial compression ring 302, and a displacement ring groove 303, which are sequentially arranged from the open edge of the pressing head to the inside of the pressing head.

[0042] The cutting-in ring groove first contacts the outer periphery of the sector-shaped pressing block during the pressing process of the pressing head, and the annular slope inner wall of the cutting-in ring groove slides with the sector-shaped outer wall of the sector-shaped pressing block.

[0043] During the continuous downward movement of the pressing head, the radial compression ring slides against the sector-shaped outer wall of the sector-shaped pressing block, providing a radial aggregation compression force for the plurality of sector-shaped pressing blocks.

[0044] When the pressing head reaches the limit position, the plurality of upward pressing blocks are radially expanded to provide an axial compression displacement for the hollow pressing cylinder.

[0045] The working principle of the utility model is as follows:

[0046] The utility model solves the problem of uneven deformation of the aluminum foil ring, which leads to incomplete wrapping of the filter membrane sampling head assembly, and avoids sampling leakage of the filter membrane sampling head assembly.

[0047] During the stamping process, the pressing head and the pressing seat sequentially perform four phased posture actions as shown in Figures 1 to 4 When the filter membrane sampling head assembly is installed into the compression device and taken out from the inside of the compression device after the compression of the filter membrane sampling head assembly is completed, the position and posture of the pressing head and the pressing seat are as shown in Figure 1 .

[0048] During the downward movement of the pressing head into the pressing seat, it is divided into a radial extrusion stage and an axial stamping stage. During the radial extrusion stage, the plurality of sector-shaped pressing blocks are radially gathered to press the upper half of the aluminum foil ring into the orthographic projection area above the filter membrane sampling head assembly (at this time, the aluminum foil ring is not compacted).

[0049] Finally, the pressing head continues to move downward until the arc-shaped surface of the outer periphery of the sector-shaped pressing block slides and fits with the inner wall of the displacement ring groove. At this time, the restoring spring provides a radial expansion power for the sector-shaped pressing block, and the bottom end Z of the hollow pressing cylinder stamps the top of the aluminum foil ring to compact the aluminum foil ring.

[0050] The above has described the utility model and its implementation mode, which is not restrictive, and the drawings only show one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.

Claims

1. An aluminum foil ring pressing device for a filter membrane sampling head assembly, characterized in that: The pressing device circumferentially covers, radially extrudes, and Z-presses the aluminum foil ring of the filter membrane sampling head assembly in the XY plane. The pressing device includes a pressure head and a pressure base that are coaxially fitted and stamped. The filter membrane sampling head assembly is placed in the Z direction at the center of the top surface of the pressure base, and the outer periphery of the top surface of the pressure base slides radially in the XY plane and elastically supports multiple fan-shaped pressure blocks that surround the outer periphery of the filter membrane sampling head assembly. The bottom of the pressure head is open and axially inserted into the pressure base. Multiple sloping annular grooves are made on the circumferential inner wall of the pressure head to provide radial pressing force for the fan-shaped pressure block. A hollow pressure cylinder with a Z-direction pressing aluminum foil ring is coaxially inserted into the middle of the pressure head.

2. The aluminum foil ring pressing device for a filter membrane sampling head assembly according to claim 1, characterized in that: The top of the pressure seat is open, and the outer edge of the top surface of the pressure seat is formed with a radially fitted and constrained outer wall of the pressure head. A boss protruding in the Z direction and supporting the fan-shaped pressure block and filter membrane sampling head assembly is fixed in the middle of the top surface of the pressure seat, and a relief groove with a Z direction recess is opened between the outer edge and the boss to provide clearance for the pressure head to press down.

3. The aluminum foil ring pressing device for a filter membrane sampling head assembly according to claim 2, characterized in that: The top surface of the boss is circumferentially distributed and radially extended with multiple T-shaped blocks; each of the fan-shaped pressure blocks has a Z-shaped groove that extends radially; a T-shaped slider is constrained in the Z direction and slidably inserted in the T-shaped groove, and a return spring is elastically supported at one end of the inner wall of the T-shaped groove; the other end of the return spring is elastically supported on the radial end side wall of the T-shaped slider, and multiple return springs provide radial opening power for multiple fan-shaped pressure blocks respectively.

4. The aluminum foil ring pressing device for a filter membrane sampling head assembly according to claim 3, characterized in that: The fan-shaped pressure block has a sloping arc-shaped surface on both its inner and outer radial circumferences, wherein: The arc-shaped surface located on the radial inner circumference of the fan-shaped pressure block radially presses the aluminum foil ring covering the outer circumference of the filter membrane sampling head assembly onto the XY plane; The arc-shaped surface located on the radial outer periphery of the fan-shaped pressure block slides and engages with the inner wall of the sloping annular groove as the pressure head presses down, causing multiple fan-shaped pressure blocks to perform radial contraction action against the reset supporting force of the reset spring.

5. The aluminum foil ring pressing device for a filter membrane sampling head assembly according to claim 1, characterized in that: The slope annular groove is provided with multiple channels, including a cutting annular groove, a radial pressing ring, and a relief annular groove arranged sequentially from the edge of the pressure head opening into the pressure head; During the pressing process, the cutting ring groove first contacts the outer periphery of the fan-shaped pressing block, and the inner wall of the annular slope of the cutting ring groove slides in conjunction with the outer wall of the fan-shaped pressing block. As the pressure head continues to descend, the radial pressing ring slides against the outer wall of the fan-shaped pressing block, providing radially converging pressing force to the multiple fan-shaped pressing blocks; When the pressure head descends to its limit position, multiple upward pressure blocks open radially to provide axial pressing clearance for the hollow pressure cylinder.

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