CN217304817U - A mould that is used for centre gripping gauze mask to develop filtration efficiency and detects - Google Patents

Abstract

The utility model relates to a mould for clamping a mask to carry out filtration efficiency detection, which comprises an upper clamp and a lower clamp, wherein the upper clamp comprises a hollow upper outer clamp and a hollow upper inner clamp; the lower clamp comprises a hollow lower outer clamp and a hollow lower inner clamp, and the bottom end faces of the hollow upper outer clamp and the hollow upper inner clamp are respectively provided with a first outer matching part and a first inner matching part along the circumferential direction; the top ends of the lower hollow outer clamp and the lower hollow inner clamp are respectively provided with a second outer matching part and a second inner matching part along the circumferential direction; the cooperation portion cooperation is used for pressing from both sides tight gauze mask and anchor clamps, well kenozooecium is the air current passageway that link up from top to bottom for just to testing the wind channel, the anchor clamps that go up with the cooperation of anchor clamps down forms the detection space that is used for holding or firm centre gripping gauze mask that awaits measuring. The utility model discloses can furthest keep the sample not have skew, seamless, the no overlapping to improve the accuracy that gauze mask filtration efficiency detected, and have stronger suitability.

Description

A mould that is used for centre gripping gauze mask to develop filtration efficiency and detects

Technical Field

The utility model belongs to the technical field of anchor clamps, a gauze mask filtration efficiency detects and uses anchor clamps is related to, especially one kind is used for the centre gripping gauze mask to develop the mould that filtration efficiency detected.

Background

When the quality of the mask is detected, the filtering efficiency item is used as a key detection technical index, and the detection result is directly related to whether the quality of the mask is qualified or not. Masks are generally divided into medical masks and non-medical masks according to purposes, are generally divided into planar masks and non-planar masks according to structures, and for the medical planar masks, the test area (namely the cross section area through which airflow passes) is clearly specified according to related test standards (YY0469-2011), and test areas and sample placement modes are not clearly specified in related standard texts for mask test of other types, so that a deviation space is generated for the accuracy degree of a test result.

During long-term testing, we have found that the mask, if not secured and attached to the test device with appropriate clamps, can suffer from the following problems: firstly, the test safety risk is high: after receiving a test starting instruction, the test device quickly falls under the action of the airflow; secondly, the repeated test has low efficiency: huge pressure is generated instantaneously when the upper part and the lower part of the detection equipment are closed, so that a non-planar mask sample deviates from a test position, and the sample cannot completely cover a test area. The position of the sample is required to be adjusted repeatedly, or only the test result that the sample is not deviated is required to be obtained; the sample quantity requirement for testing the filtering efficiency of the mask sample of a single model is 6-15, and the test efficiency is lower if the test is repeatedly adjusted. More importantly, if the sample is not adjusted to the conventional position, the detection result is obviously lower, so that the product which is possibly qualified originally is judged as unqualified by mistake. Thirdly, the test results are not accurate enough: the shapes of the mask samples are different, and wrinkles generated by the three-dimensional structure of the mask samples repeatedly cover a test area, so that the detection result is higher; and the traditional anchor clamps suitability is narrow, and a anchor clamps often can only the gauze mask of a specification of centre gripping, therefore often need numerous anchor clamps to satisfy the needs of detecting, has caused the wasting of resources, has improved the trade burden.

Therefore, the mask fixture which is wide in applicability, stable in clamping and convenient to detect is urgently needed, so that the test safety and accuracy are improved, the inspection efficiency is improved, and the technical support is provided for the quality detection of epidemic prevention materials.

The following patent documents relevant to the present application are found by search, and specific disclosures are as follows:

1. a detection clamp (CN201921382864.9) for multi-specification masks comprises a bottom clamp, a middle clamp and a top clamp; the bottom clamp is a hollow cylindrical body, the hollow part is an air flow channel which is communicated up and down, and an external thread is arranged on the side contour surface of the bottom clamp; the middle clamp is a hollow cylindrical body, and the hollow part is an air flow channel which is communicated up and down; the top clamp is of a hollow cover body structure, and the hollow part is an air flow channel which is communicated up and down; a test cavity is arranged in the top clamp, the test cavity is a cylindrical cavity, the shape of the inner outline surface of the test cavity is correspondingly matched with the shape of the side outline surface of the bottom clamp, and an internal thread correspondingly matched with the external thread is arranged on the inner outline surface of the test cavity; the upper surface of the bottom clamp is provided with a mask to be detected, and the lower surface of the middle clamp is pressed on the mask to be detected; the top clamp and the bottom clamp are screwed together through the internal thread and the external thread, and the middle clamp is tightly pressed in a space formed by the test cavity and the upper surface of the bottom clamp; and the air flow channels of the bottom clamp, the middle clamp and the top clamp are mutually matched and communicated.

2. A fixture and device (CN202021832737.7) for detecting the filtering efficiency of a mask comprise: the testing device comprises an upper clamp, a lower clamp and a testing device, wherein a testing air channel is formed in the upper clamp, and a first matching part is arranged on the bottom end surface of the upper clamp along the circumferential direction of the upper clamp; the lower clamp is provided with a plane part, a second matching part is arranged on the top surface of the plane part along the circumferential direction of the plane part, an opening is formed in the plane part, the second matching part surrounds the opening, a bonding layer for adhering and fixing the mask to be tested is arranged at the position, close to the opening, of the plane part, and the bonding layer faces the upper clamp; the first matching portion is matched with the second matching portion to enable the upper clamp and the lower clamp to be clamped and fixed, the opening is right opposite to the test air duct, and the upper clamp and the lower clamp are matched to form an accommodating space for accommodating the mask to be tested.

Through the contrast of technical characteristics, above-mentioned patent publication with the utility model discloses a technical structure is inequality, can not influence the utility model discloses the creativity and the novelty of application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's weak point, provide a mould that is used for the centre gripping gauze mask to develop filtration efficiency and detects, this mould can furthest keep the sample not have skew, seamless, the nothing to overlap when detecting gauze mask filtration efficiency.

The utility model provides a its technical problem take following technical scheme to realize:

a mold for clamping a mask to carry out filtration efficiency detection comprises an upper clamp and a lower clamp, wherein the upper clamp comprises a hollow upper outer clamp and a hollow upper inner clamp coaxially arranged in the hollow upper outer clamp; the lower clamp comprises a hollow lower outer clamp and a hollow lower inner clamp coaxially arranged in the hollow lower outer clamp, the hollow upper outer clamp and the hollow lower outer clamp are both of a hollow cover body structure, and the hollow upper inner clamp and the hollow lower inner clamp are both of a hollow cylinder structure; the end faces of the bottoms of the upper hollow outer clamp and the upper hollow inner clamp of the upper clamp are respectively provided with a first outer matching part and a first inner matching part along the circumferential direction; the top ends of the hollow lower outer clamp and the hollow lower inner clamp of the lower clamp are respectively provided with a second outer matching part and a second inner matching part along the circumferential direction of the hollow lower outer clamp and the hollow lower inner clamp; first interior cooperation portion with the cooperation of second interior cooperation portion is used for pressing from both sides tight gauze mask, the cooperation of first outer cooperation portion and the outer cooperation portion of second is used for with upper and lower anchor clamps are pressed from both sides tightly, upper clamp with the cooperation of lower anchor clamps forms hollow portion and detection space, the well hollow portion is the air current passageway that link up from top to bottom for just to testing the wind channel, the detection space is used for holding or firm centre gripping gauze mask that awaits measuring.

The hollow upper outer clamp comprises a hollow cover body with a downward opening, a hollow part of the hollow cover body with the downward opening is coaxially and upwardly provided with a hollow pressure-bearing neck for pressure-bearing filtration efficiency testing equipment, and the top end surface of the hollow pressure-bearing neck is provided with a sealing ring along the circumferential direction; and an upper inserting ring is coaxially arranged in the hollow cover body with the downward opening corresponding to the position of the hollow pressure-bearing neck and is used for coaxially inserting the hollow upper inner clamp.

And, outer clamp includes the ascending cavity cover body of opening under the cavity, the coaxial cavity portion of the ascending cavity cover body of opening makes the cavity installation neck that is used for closely installing with the bed die of filtration efficiency test equipment down, and its bottom end face still makes a concave ring groove, and the inside of the ascending cavity cover body of opening that corresponds this cavity installation neck position still makes the lower insert ring of coaxial cartridge for the cavity inner clamp under the coaxial cartridge.

And one end of the hollow upper inner clamp and one end of the hollow lower inner clamp are respectively provided with a mounting part which is used for being coaxially inserted with the hollow upper outer clamp and the hollow lower outer clamp.

And the diameters of the upper hollow outer clamp and the lower hollow outer clamp are 1-2 times of the diameters of the upper hollow inner clamp and the lower hollow inner clamp.

And the cross position is installed with spacing hook on the circumference lateral wall of interior clamp under the cavity, and spacing hook's orientation is for the level down.

And, the upper clamp and the lower clamp are elastic bodies.

The utility model has the advantages that:

the utility model fixes the non-planar, planar and medical planar mask to the testing area of the filtering efficiency testing instrument through the upper and lower clamps under the condition of no appearance damage, thereby greatly reducing the risk of injury in the manual operation process of testing personnel, improving the safety performance of test operation and facilitating the completion of tests by common technicians;

the upper surface and the lower surface of the clamp can be tightly connected with a filtering efficiency testing instrument, the clamp is firm in material, low in noise during test stamping, free from deviation in the whole clamp, simple in sample loading mode and easy to operate, and suitable for large-batch sample detection; the test efficiency is obviously improved compared with that of the mold which is not used;

the mask test result can be more accurate by using the fixture, the non-planar mask samples have different shapes, folds generated by the three-dimensional structure often repeatedly cover a test area, the thickness of the filtering material is increased from the test principle, and the filtering efficiency result is higher; when the mould of the utility model is used for testing the filtering efficiency, the mask sample can be completely unfolded and misaligned, the state of people wearing the mask is simulated, and the test result is closer to the actual value;

the utility model can be disassembled for use aiming at the type without using the mask, and is provided with double-layer pressing and clamping, thereby greatly improving the air tightness and stability when detecting the mask; the utility model has reasonable structure configuration and stable and convenient use;

the utility model discloses an upper and lower anchor clamps be hollow structure, the gauze mask is fixed with this well kenozooecium for the gauze mask that awaits measuring is just to testing the wind channel, helps improving the accuracy that gauze mask filtration efficiency detected.

Drawings

FIG. 1 is a schematic structural diagram of this embodiment 1;

FIG. 2 is an exploded view of the present example 1;

FIG. 3 is a perspective view of the present embodiment 1;

fig. 4 is a schematic structural diagram of embodiment 2.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention should not be limited thereto.

A mould for clamping a mask to carry out filtration efficiency detection comprises an upper clamp 1 and a lower clamp 2, wherein the upper clamp comprises a hollow upper outer clamp 1-1-2 and a hollow upper inner clamp 1-2-1 coaxially arranged in the hollow upper outer clamp; the lower clamp comprises a hollow lower outer clamp 2-2 and a hollow lower inner clamp 2-1 coaxially arranged in the hollow lower outer clamp, the hollow upper outer clamp and the hollow lower outer clamp are both of a hollow cover body structure, and the hollow upper inner clamp and the hollow lower inner clamp are of a hollow cylinder structure; the bottom end faces of the hollow upper outer clamp and the hollow upper inner clamp of the upper clamp are respectively provided with a first outer matching part 1-1-3 and a first inner matching part 1-2-2 along the circumferential direction; the top ends of the hollow lower outer clamp and the hollow lower inner clamp of the lower clamp are respectively provided with a second outer matching part 2-2-1 and a second inner matching part 2-1-1 along the circumferential direction; the first inner matching part and the second inner matching part are matched for clamping the mask, the first outer matching part and the second outer matching part are matched for further clamping the upper clamp and the lower clamp, hollow parts corresponding to the upper clamp and the lower clamp are hollow parts 1-1-5 and 2-2-3, the hollow parts are air flow channels which are communicated up and down and are used for facing the test air duct, and the upper clamp and the lower clamp are matched to form a detection space for accommodating and stably clamping the mask to be tested;

specifically, the hollow upper outer clamp comprises a hollow cover body with a downward opening, a hollow pressure-bearing neck 1-1-1 for pressure-bearing filtration efficiency testing equipment is coaxially and upwardly arranged in the hollow part of the hollow cover body with the downward opening, and a sealing ring 1-1-6 is arranged on the top end surface of each hollow pressure-bearing neck along the circumferential direction of the hollow pressure-bearing neck; an upper inserting ring 1-1-4 is coaxially arranged in the hollow cover body with a downward opening corresponding to the position of the hollow pressure-bearing neck and is used for coaxially inserting the hollow upper inner clamp;

the hollow lower outer clamp comprises a hollow cover body with an upward opening, a hollow mounting neck used for being tightly mounted with a lower die of the filtration efficiency testing equipment is coaxially and downwardly arranged in the hollow part of the hollow cover body with the upward opening, a concave ring groove is further formed in the bottom end face of the hollow mounting neck, and the air tightness degree meets the testing requirements; a lower inserting ring 2-2-2 is coaxially arranged inside the hollow cover body with an upward opening corresponding to the hollow mounting neck and is used for coaxially inserting the hollow lower inner clamp;

furthermore, mounting parts 1-2-3 and 2-1-3 are respectively arranged at one end of the hollow upper inner clamp and one end of the hollow lower inner clamp and are respectively coaxially inserted with the hollow upper outer clamp and the hollow lower outer clamp;

in the practical implementation of the utility model, the diameters of the hollow upper outer clamp and the hollow lower outer clamp of the upper clamp and the lower clamp are 2 times of the diameters of the hollow upper inner clamp and the hollow lower inner clamp of the upper clamp and the lower clamp;

the utility model can clamp a common plane mask, a medical plane mask and a non-plane mask;

the utility model discloses a when making the test non-planar gauze mask, in order to further fix the gauze mask, ensure that the gauze mask is arranged in the air current passageway central point on the cavity lower inner clip and put, install spacing hook 2-1-2 in the cross position on the circumference lateral wall of cavity lower inner clip, and the orientation of spacing hook is the level down, during the use, non-planar gauze mask is detained and is put on the cavity lower inner clip of lower anchor clamps, then hang the gauze mask belt of this gauze mask that awaits measuring on spacing hook, make the gauze mask place in the middle still play the fixed effect of placing simultaneously, prevent to cause the deviation of position because of the cramp of upper anchor clamps;

furthermore, the upper clamp and the lower clamp are both elastic bodies, so that the friction force between the clamping surface and the mask can be further increased, the clamping performance is improved, and meanwhile, the sealing performance of the clamps is also improved;

in the embodiment 1, when a common plane mask and a non-plane mask are clamped, the lower clamp is formed by coaxially inserting a hollow upper outer clamp and a hollow upper inner clamp; the lower clamp is formed by coaxially inserting a hollow lower outer clamp and a hollow lower inner clamp;

specifically, the method comprises the following steps: when a common plane mask is clamped, a lower clamp is installed on a lower die of a filtering efficiency testing device, then the folds of the plane mask are pulled open, the plane mask is tiled and placed on a hollow lower outer clamp and a hollow lower inner clamp of the lower clamp, an upper clamp is installed on the lower clamp, the center detection position of the common plane mask is clamped through the hollow upper clamp and the hollow lower clamp, the outer edge of the common plane mask is secondarily fixed through the hollow upper clamp and the hollow lower clamp, and the clamping stability of the mask is greatly improved;

when clamping a non-planar mask, firstly, mounting a lower clamp on a lower die of a filtering efficiency testing device, then opening the non-planar mask which is arranged oppositely, buckling the non-planar mask on a hollow lower inner clamp of the lower clamp, hanging a hanging belt of the mask on a limiting hook on the hollow lower inner clamp to position the mask to be tested, then mounting an upper clamp, at the moment, placing the center of the non-planar mask in a hollow part of the hollow upper inner clamp of the upper clamp, clamping the edge of the mask through the hollow upper inner clamp and the hollow lower inner clamp, butting the hollow upper outer clamp and the hollow lower outer clamp to clamp the upper clamp and the lower clamp, and simultaneously playing a role of air tightness;

in embodiment 2, when the medical flat mask is clamped, the required airflow area is large, so that the upper clamp separates the upper hollow inner clamp from the upper hollow outer clamp, the lower clamp separates the lower hollow inner clamp from the lower hollow outer clamp, when the medical flat mask is used, the lower hollow outer clamp is mounted on a lower die of a filtering efficiency testing device, folds of the medical flat mask are pulled open, the medical flat mask is tiled and placed on the lower hollow outer clamp of the lower clamp, the upper hollow outer clamp is mounted on the lower hollow outer clamp, and the medical flat mask is clamped by the upper and lower hollow outer clamps, so that the clamping stability of the mask is greatly improved; and the area of the test airflow is satisfied;

the utility model fixes the non-planar, planar and medical planar mask to the testing area of the filtering efficiency testing instrument through the upper and lower clamps under the condition of no appearance damage, thereby greatly reducing the injury risk of the manual operation process of the testing personnel, improving the safety performance of the testing operation and facilitating the completion of the test by the common technicians;

the upper surface and the lower surface of the clamp can be tightly connected with a filtering efficiency testing instrument, the clamp is firm in material, low in noise during test stamping, free from deviation in the whole clamp, simple in sample loading mode and easy to operate, and suitable for large-batch sample detection; the test efficiency is obviously improved compared with that of the mold which is not used;

the mask test result can be more accurate by using the fixture, the non-planar mask samples have different shapes, folds generated by the three-dimensional structure often repeatedly cover a test area, the thickness of the filtering material is increased from the test principle, and the filtering efficiency result is higher; use the utility model discloses when the mould carries out the filtration efficiency test, can realize that the gauze mask sample expandes completely and does not coincide, state when simulation people wear the gauze mask makes the test result more press close to actual value.

The utility model can be disassembled for use aiming at the type without using the mask, and is provided with double-layer pressing and clamping, thereby greatly improving the air tightness and stability when detecting the mask; the utility model discloses structural configuration is reasonable, and it is convenient to use stably.

The utility model discloses an upper and lower anchor clamps be hollow structure, the gauze mask is fixed with this well kenozooecium for the gauze mask that awaits measuring is just to testing the wind channel, helps improving the accuracy that gauze mask filtration efficiency detected.

Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and appended claims, and therefore, the scope of the invention is not limited to the disclosure of the embodiments and drawings.

Claims (7)

1. The utility model provides a mould that is used for centre gripping gauze mask to develop filtration efficiency and detects, includes anchor clamps and lower anchor clamps, its characterized in that: the upper clamp comprises a hollow upper outer clamp and a hollow upper inner clamp coaxially arranged in the hollow upper outer clamp; the lower clamp comprises a hollow lower outer clamp and a hollow lower inner clamp coaxially arranged in the hollow lower outer clamp, the hollow upper outer clamp and the hollow lower outer clamp are both of a hollow cover body structure, and the hollow upper inner clamp and the hollow lower inner clamp are both of a hollow cylinder structure; the end faces of the bottoms of the upper hollow outer clamp and the upper hollow inner clamp of the upper clamp are respectively provided with a first outer matching part and a first inner matching part along the circumferential direction; the top ends of the hollow lower outer clamp and the hollow lower inner clamp of the lower clamp are respectively provided with a second outer matching part and a second inner matching part along the circumferential direction of the hollow lower outer clamp and the hollow lower inner clamp; the first inner matching part and the second inner matching part are matched for clamping the mask, the first outer matching part and the second outer matching part are matched for clamping the upper clamp and the lower clamp, the upper clamp and the lower clamp are matched for forming a hollow part and a detection space, and the hollow part is an air flow channel which is communicated up and down and is used for facing a test air channel; the detection space is used for accommodating or stably clamping the mask to be detected.

2. The mold for clamping mask developing filtration efficiency detection according to claim 1, wherein: the hollow upper outer clamp comprises a hollow cover body with a downward opening, a hollow part of the hollow cover body with the downward opening is coaxially and upwardly provided with a hollow pressure-bearing neck for pressure-bearing filtration efficiency testing equipment, and the top end surface of the hollow pressure-bearing neck is provided with a sealing ring along the circumferential direction; and an upper inserting ring is coaxially arranged in the hollow cover body with the downward opening corresponding to the position of the hollow pressure-bearing neck and is used for coaxially inserting the hollow upper inner clamp.

3. The mold for clamping mask developing filtration efficiency detection according to claim 1, wherein: the hollow lower outer clamp comprises a hollow cover body with an upward opening, a hollow mounting neck used for being tightly mounted with a lower die of the filtration efficiency testing equipment is coaxially manufactured downwards in a hollow part of the hollow cover body with the upward opening, a concave ring groove is further manufactured on the bottom end face of the hollow cover body, a lower inserting ring is further coaxially manufactured inside the hollow cover body with the upward opening corresponding to the hollow mounting neck, and the hollow lower outer clamp is used for coaxially inserting the hollow lower inner clamp.

4. The mold for clamping mask development filtration efficiency detection according to claim 1, wherein the mold comprises: and one end of each of the hollow upper and lower inner clamps is provided with a mounting part for being respectively inserted coaxially with the hollow upper and lower outer clamps.

5. The mold for clamping mask developing filtration efficiency detection according to claim 1, wherein: the diameters of the upper hollow outer clamp and the lower hollow outer clamp are 1-2 times of the diameters of the upper hollow inner clamp and the lower hollow inner clamp.

6. The mold for clamping mask developing filtration efficiency detection according to claim 1, wherein: the cross position is installed with spacing hook on the circumference lateral wall of interior clamp under the cavity, and spacing hook's orientation is for the level down.

7. The mold for clamping mask development filtration efficiency detection according to claim 1, wherein the mold comprises: the upper clamp and the lower clamp are both elastic bodies.

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