Multi-layer filtering device with water-soluble filter membrane

Abstract

A filtering mechanism comprises a cylindrical shell, a bottom connecting component is arranged at the bottom of the cylindrical shell, at least two filtering nets are transversely arranged in a filtering chamber of the cylindrical shell, the hole diameters of filtering holes in the filtering nets are gradually reduced in the direction from the top of the cylindrical shell to the bottom of the cylindrical shell, and the bottom connecting component is connected with the bottom of the cylindrical shell. The middle connecting mechanism comprises a middle cylinder, a top fixing component is arranged at the top of the middle cylinder, a bottom connecting component is arranged at the bottom of the middle cylinder, a conical flow guide part is arranged in the middle cylinder, and a central liquid guide pipe is connected to the bottom of the conical flow guide part; and a filter head is arranged at the bottom of the bottom liquid dropping cylinder. According to the multi-layer filtering device with the water-soluble filter membrane, a filtering solution is filtered more sufficiently through multi-layer filtering, and the situation that all paper pulp falls on the same layer of filter screen, so that filtering is difficult, and filtering is insufficient is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to atmospheric detection technical field, especially water -soluble filter membrane multilayer filtration device. BACKGROUND

[0002] Atmospheric particulate (such as PM2.5, PM10 etc.) has adverse effects on air quality, human health, atmospheric visibility and global climate change, and water-soluble component is an important part of atmospheric particulate, which mainly includes some inorganic ions (such as nitrate, ammonium), organic matter (such as amine, amino acid etc.) and metal elements (such as lead, cadmium etc.), and water-soluble component contains basic information of pollution source, transformation process, health risk and climate effect of atmospheric particulate.

[0003] In prior art, high-quality glass fiber, quartz or other material filter membrane with low blank value is usually used to collect atmospheric particulate, and the filter membrane after sampling is dissolved with deionized water without adding chemical reagent, so as to determine cations and anions in the filter membrane.The collection operation of collecting environmental air particulate on filter membrane is as follows: after cutting the filter membrane, it is put into a collection tube, water is added and oscillated for 2 hours to form a filter liquid needing to be filtered, and after oscillation, the filter liquid is filtered by using acetic acid fiber or polyethylene filter membrane (filter head) with a pore size of 0.45 μm or 0.22 μm.When quartz material is used as sampling filter membrane, the liquid becomes paper pulp after oscillation, so that there are two inconveniences in the filtering process, one is that the paper pulp water blocks the liquid outlet end of the detection needle cylinder and the filter head end, making the filtering very difficult, and the other is that the measured liquid is limited, and the liquid filtering is insufficient due to the serious paper pulp, so that the measured liquid is insufficient, and the detection result is prone to error. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a water-soluble filter membrane multilayer filtration device to solve the above-mentioned deficiencies in prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A water-soluble filter membrane multilayer filtration device, comprising:

[0007] The filtering mechanism comprises a cylindrical shell, a bottom connecting member is arranged at the bottom of the cylindrical shell, a filtering chamber is formed in the cylindrical shell, at least two filter screens are arranged transversely in the filtering chamber, and the pore size of the filter holes in the filter screens gradually decreases from the top to the bottom of the cylindrical shell.

[0008] The intermediate connecting mechanism comprises an intermediate cylinder with the same size as the cylindrical shell, the top of the intermediate cylinder is provided with a top fixing member, the bottom of the intermediate cylinder is provided with the bottom connecting member, the inside of the intermediate cylinder is provided with a conical flow guide, the bottom of the conical flow guide is provided with a bottom liquid guide opening, a central liquid guide tube is connected to the bottom liquid guide opening, the conical flow guide, the central liquid guide tube and the inner wall of the intermediate cylinder form a suction cavity, a suction mounting hole in communication with the suction cavity is arranged on the side wall of the intermediate cylinder, and a suction pipe is detachably mounted in the suction mounting hole.

[0009] The bottom liquid drop mechanism comprises a liquid drop cylinder, the top of the liquid drop cylinder is provided with the top fixing member, and the bottom of the bottom liquid drop cylinder is provided with a filter head.

[0010] The water-soluble filter membrane multi-layer filtering device, the bottom of the liquid drop cylinder is provided with a liquid drop output pipe, and the filter head comprises a filter disc and a connecting pipe arranged on the filter disc, the connecting pipe being connected with the liquid drop output pipe.

[0011] The water-soluble filter membrane multi-layer filtering device, the filter disc is provided with a bottom filter.

[0012] The water-soluble filter membrane multi-layer filtering device, the filter screen comprises a first filter screen body and a second filter screen body, the first filter screen body is arranged directly above the second filter screen body, and the first filter holes on the first filter screen body are larger in size than the second filter holes on the second filter screen.

[0013] The water-soluble filter membrane multi-layer filtering device, the bottom liquid guide opening is provided with a filter head.

[0014] The water-soluble filter membrane multi-layer filtering device, the bottom connecting member comprises at least two connecting rods, the connecting rods are fixedly installed on the bottom side wall of the cylindrical shell or the intermediate cylinder, and arc-shaped locking plates are movably arranged at the ends of the connecting rods.

[0015] The water-soluble filter membrane multi-layer filtering device, the top fixing member comprises at least two fixing bodies, the fixing bodies are fixedly installed on the top side wall of the intermediate cylinder or the liquid drop cylinder, and the fixing bodies are arranged in correspondence with the connecting rods.

[0016] The water-soluble filter membrane multi-layer filtering device, the fixing body comprises oppositely arranged first and second fixing plates, and the first and second fixing plates form a mounting groove for embedding the connecting rod therebetween.

[0017] The end of the first fixed plate and the second fixed plate is provided with a locking opening slot, the locking opening slot is provided with a locking hole, and the arc-shaped locking plate is provided with a locking column capable of being embedded into the locking hole.

[0018] In the above technical scheme, the water-soluble filter membrane multi-layer filtering device provided by the utility model, including filter mechanism, intermediate connecting mechanism and bottom drip mechanism, filter mechanism includes cylindrical shell, at least two filter screens are arranged across in filter chamber, the pore size of filter hole on filter screen gradually decreases from the top to the bottom of cylindrical shell, intermediate connecting mechanism includes intermediate cylinder which is same in size with cylindrical shell, the inside of intermediate cylinder is provided with conical flow guide, the bottom of conical flow guide is provided with bottom liquid guide opening, center liquid guide pipe is connected to bottom liquid guide opening, bottom drip mechanism includes drip cylinder, the bottom of bottom drip cylinder is provided with filter head, in use, cylindrical shell can be connected with drip cylinder according to requirement, cylindrical shell, intermediate cylinder and drip cylinder can be connected in turn, so that the solution to be filtered can be transported into cylindrical shell, and the filtered solution is filtered more fully through multi-layer filtering, so that all the pulp is not dropped on the same layer of filter screen, and the difficulty of filtering is avoided, so that the filtering is not insufficient. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can be obtained by those skilled in the art according to these drawings.

[0020] Figure 1 The utility model provides a perspective view of the filter mechanism for the embodiments of the utility model;

[0021] Figure 2 The utility model provides a perspective view of the intermediate connecting mechanism for the embodiments of the utility model;

[0022] Figure 3 The utility model provides a perspective view of the bottom drip mechanism for the embodiments of the utility model;

[0023] Figure 4 The utility model provides a perspective view of the water-soluble filter membrane multi-layer filtering device for the embodiments of the utility model;

[0024] Figure 5 The utility model provides a perspective view of the water-soluble filter membrane multi-layer filtering device for the embodiments of the utility model;

[0025] Figure 6 The installation schematic view of the water-soluble filter membrane multi-layer filtering device is provided for the embodiments of the present application.

[0026] Figure 7 The sectional view of the water-soluble filter membrane multi-layer filtering device is provided for the embodiments of the present application.

[0027] Figure 8 The top view of the water-soluble filter membrane multi-layer filtering device is provided for the embodiments of the present application.

[0028] Mark explanation:

[0029] 1, filter mechanism; 11, cylindrical shell; 12, filter chamber; 13, filter screen; 131, first filter screen body; 132, second filter screen body; 2, intermediate connecting mechanism; 21, intermediate cylinder; 22, conical flow guide; 23, bottom liquid guide opening; 24, central liquid guide pipe; 25, suction cavity; 26, suction mounting hole; 27, suction pipe; 28, filter head; 3, bottom liquid drop mechanism; 31, liquid drop cylinder; 32, filter head; 321, filter disc; 322, connecting pipe; 323, bottom filter element; 4, bottom connecting member; 41, connecting rod; 42, arc-shaped locking plate; 43, locking column; 5, top fixing member; 51, first fixing plate; 52, second fixing plate; 53, mounting groove; 54, locking opening slot; 55, locking hole. DETAILED DESCRIPTION

[0030] In order to make the technical personnel in the art better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings.

[0031] As Figures 1-8The utility model provides a kind of water-soluble filter membrane multilayer filtering device, including filtering mechanism 1, intermediate connecting mechanism 2 and bottom drop mechanism 3, filtering mechanism 1 includes cylindrical shell 11, the bottom of cylindrical shell 11 is provided with bottom connecting member 4, filter chamber 12 is formed inside cylindrical shell 11, at least two filter screens 13 are provided in filter chamber 12, the aperture of filter hole on filter screen 13 gradually decreases from the direction of the top to the bottom of cylindrical shell 11, intermediate connecting mechanism 2 includes the intermediate cylinder 21 of the same size with cylindrical shell 11, the top of intermediate cylinder 21 is provided with top fixed component 5, the bottom of intermediate cylinder 21 is provided with bottom connecting member 4, the inside of intermediate cylinder 21 is provided with conical flow guide piece 22, the bottom of conical flow guide piece 22 is provided with bottom liquid guide port 23, center liquid guide pipe 24 is connected on bottom liquid guide port 23, sealed suction cavity 25 is formed between conical flow guide piece 22 and center liquid guide pipe 24 and the inner wall of intermediate cylinder 21, suction mounting hole 26 that is connected with suction cavity 25 is provided on the side wall of intermediate cylinder 21, suction pipe 27 is detachably installed in suction mounting hole 26, bottom drop mechanism 3 includes drop cylinder 31, the top of drop cylinder 31 is provided with top fixed component 5, the bottom of bottom drop cylinder 31 is provided with filter head 32.

[0032] Specifically, filtering mechanism 1 includes cylindrical shell 11 and filter screen 13, cylindrical shell 11 is hollow to form a cylindrical filter chamber 12 inside, the top and bottom of cylindrical shell 11 are open, filter screen 13 is transversely arranged in filter chamber 12, filter screen 13 has at least two, and the aperture of filter hole on filter screen 13 gradually decreases from the direction of the top to the bottom of cylindrical shell 11, so that two or more layers of filter screen 13 are used to filter the filter liquid to be filtered, for example, if filter screen 13 has three, the three filter screens 13 are arranged from top to bottom, the aperture of filter hole on the upper filter screen 13 is 1cm, the aperture of filter hole on the middle filter screen 13 is 0.6cm, and the aperture of filter hole on the lowermost filter screen 13 is 0.4cm, so that when the filter liquid to be filtered is delivered to the inside of filter chamber 12, the filter liquid passes through the three filter screens 13 in turn, and the filter liquid is filtered in turn by filter screen 13 and output.

[0033] In this embodiment, the intermediate connecting mechanism 2 comprises an intermediate cylinder 21, the size of the intermediate cylinder 21 is consistent with the size of the cylindrical shell 11, the inside of the intermediate cylinder 21 is provided with a conical flow guide 22, the bottom of the conical flow guide 22 is provided with a bottom liquid guide 23, the bottom liquid guide 23 is located in the middle position of the conical flow guide 22, a central liquid guide pipe 24 is connected to the bottom liquid guide 23, so that the inner wall of the intermediate cylinder 21, the conical flow guide 22 and the central liquid guide pipe 24 form a suction cavity 25, a suction installation hole 26 is provided on the side wall of the intermediate cylinder 21 and communicates with the suction cavity 25, the suction installation hole 26 communicates with the suction cavity 25, a suction pipe 27 is provided on the suction installation hole 26, the suction pipe 27 can be connected with the suction pump, so that the suction cavity 25 is subjected to reduced pressure, the pressure in the filtering cavity is reduced, thereby forming a pressure difference above and below the conical flow guide 22, accelerating the filtering rate of the filtering solution by the filtering screen 13, shortening the filtering time, the bottom liquid drop mechanism 3 comprises a liquid drop cylinder 31, the bottom of the bottom liquid drop cylinder 31 is provided with a filter head 32.

[0034] In this embodiment, the size of the cylindrical shell 11, the intermediate cylinder 21 and the liquid drop cylinder 31 is consistent, the bottom of the cylindrical shell 11 is provided with a bottom connecting member 4, the top of the intermediate cylinder 21 is provided with a top fixing member 5, the bottom of the intermediate cylinder 21 is provided with a bottom connecting member 4, the top of the liquid drop cylinder 31 is provided with a top fixing member 5, the top fixing member 5 and the bottom connecting member 4 are correspondingly provided, in use, the top fixing member 5 and the bottom connecting member 4 can be connected so that the cylindrical shell 11, the intermediate cylinder 21 and the liquid drop cylinder 31 can be combined and connected, according to the specific use, there are two different combination modes, the first mode: the cylindrical shell 11 is connected with the liquid drop cylinder 31, the bottom connecting member 4 at the bottom of the cylindrical shell 11 is connected with the top fixing member 5 at the top of the liquid drop cylinder 31, so that the connection of the cylindrical shell 11 and the liquid drop cylinder 31 forms a filtering treatment for the filtering solution which needs to be filtered, so that the filtering solution which needs to be filtered is delivered into the cylindrical shell 11, filtered by the multi-layer filtering screen 13 in the cylindrical shell 11, the filtered solution is delivered into the liquid drop cylinder 31, filtered by the filter head 32 at the bottom of the liquid drop cylinder 31, thereby obtaining the detection liquid which can be detected. The second mode, the bottom connecting member 4 at the bottom of the cylindrical shell 11 is connected with the top fixing member 5 at the top of the intermediate cylinder 21, the bottom connecting member 4 at the bottom of the intermediate cylinder 21 is connected with the top fixing member 5 at the top of the liquid drop cylinder 31, so that the cylindrical shell 11, the intermediate cylinder 21 and the liquid drop cylinder 31 are connected in turn, so that the filtering solution which needs to be filtered is delivered into the cylindrical shell 11, filtered by the multi-layer filtering screen 13 in the cylindrical shell 11, the filtered solution is delivered into the intermediate cylinder 21, the solution is delivered into the liquid drop cylinder 31 after passing through the intermediate cylinder 21, filtered by the filter head 32 at the bottom of the liquid drop cylinder 31, thereby obtaining the detection liquid which can be detected.

[0035] The water-soluble filter membrane multi-layer filtering device provided by the utility model, including filter mechanism 1, intermediate connecting mechanism 2 and bottom drip mechanism 3, filter mechanism 1 includes cylindrical shell 11, at least two filter screens 13 are arranged in the filter chamber 12, the pore size of the filter holes on the filter screen 13 gradually decreases from the top to the bottom of the cylindrical shell 11, the intermediate connecting mechanism 2 includes the intermediate cylinder 21 with the same size as the cylindrical shell 11, the inside of the intermediate cylinder 21 is provided with a conical flow guide 22, the bottom of the conical flow guide 22 is provided with a bottom liquid guide 23, the center liquid guide pipe 24 is connected to the bottom liquid guide 23, the bottom drip mechanism 3 includes a drip cylinder 31, the bottom of the bottom drip cylinder 31 is provided with a filter head 32, in the use process, the cylindrical shell 11 can be connected with the drip cylinder 31 according to the requirement, and the cylindrical shell 11, the intermediate cylinder 21 and the drip cylinder 31 are sequentially connected, so that the solution to be filtered can be transported into the cylindrical shell 11, the solution is filtered by two or more layers of filter screens 13, and the filtered solution is transported into the bottom drip cylinder 31 and filtered by the filter head 32 at the bottom of the drip cylinder 31, so that the detection liquid capable of being detected is obtained, and the filtered solution is filtered more fully through multi-layer filtering, all the paper pulp is prevented from falling on the same layer of filter screen and causing filtering difficulty, and the filtering is not insufficient.

[0036] In the embodiment, preferably, the bottom of the drip cylinder 31 is provided with a drip output pipe, the filter head 32 includes a filter disc 321 and a connecting pipe 322 arranged on the filter disc 321, the connecting pipe 322 is connected with the drip output pipe, and the filter disc 321 is provided with a bottom filter 323; so that the solution to be filtered in the drip cylinder 31 is transported into the inside of the filter disc 321 through the drip output pipe and the connecting pipe 322, filtered by the bottom filter 323 at the bottom of the filter disc 321, and detection liquid to be detected is formed.

[0037] In the embodiment, preferably, the filter screen 13 includes a first filter screen body 131 and a second filter screen body 132, the first filter screen body 131 and the second filter screen body 132 are both arranged in the filter chamber 12, the first filter screen body 131 is arranged directly above the second filter screen body 132, the pore size of the first filter hole on the first filter screen body 131 is greater than the pore size of the second filter hole on the second filter screen 13, so that the filtered solution is transported into the cylindrical shell 11, firstly filtered by the first filter screen body 131, and then filtered again by the second filter screen body 132, so that the solution is filtered by filter holes of different sizes, and the filtered solution is filtered more fully, and all the paper pulp is prevented from falling on the same layer of filter screen and causing filtering difficulty.

[0038] In the embodiment, preferably, the bottom liquid guide port 23 is provided with a filter head 28, the filter head 28 adopts a ready-made 0.45-micron filter head, the third filter hole on the filter head 28 has a smaller aperture than the second filter hole; in this way, the solution filtered by the first filter screen body 131 and the second filter screen body 132 is delivered into the intermediate cylinder 21, the solution is delivered onto the conical flow guide 22, and is filtered by the filter head 28, and the filtered solution is delivered to the central liquid guide pipe 24 and is output from the central liquid guide pipe 24.

[0039] In the embodiment, preferably, the bottom connecting member 4 includes at least two connecting rods 41, the connecting rods 41 are fixedly installed on the bottom side wall of the cylindrical shell 11 or the intermediate cylinder 21, and the connecting rods 41 are arranged along the radial direction of the cylindrical shell 11 or the intermediate cylinder 21; when there are two, three or more connecting rods 41, two or more connecting rods 41 are sequentially and spacedly arranged along the circumferential direction of the cylindrical shell 11 or the intermediate cylinder 21, the end portion of the connecting rod 41 is movably provided with an arc-shaped locking plate 42, an end portion passage is arranged at the end portion of the connecting rod 41, and a movable rod is arranged on the arc-shaped locking plate 42 and movably connected in the end portion passage; in this way, the arc-shaped locking plate 42 can move relative to the end portion of the connecting rod 41.

[0040] In the embodiment, preferably, the top fixing member 5 includes at least two fixing bodies, the fixing bodies are fixedly installed on the top side wall of the intermediate cylinder 21 or the drop liquid cylinder 31, the fixing bodies are arranged in one-to-one correspondence with the connecting rods 41, and the fixing bodies include oppositely arranged first fixing plates 51 and second fixing plates 52, and an installation groove 53 for embedding the connecting rod 41 is formed between the first fixing plate 51 and the second fixing plate 52; in this way, when the bottom connecting member 4 and the top fixing member 5 are connected and installed, the connecting rod 41 is correspondingly embedded into the installation groove 53, so that the cylindrical shell 11 and the intermediate cylinder 21, the intermediate cylinder 21 and the drop liquid cylinder 31, and the cylindrical shell 11 and the drop liquid cylinder 31 are connected and installed.

[0041] In the embodiment, preferably, the end of the first fixing plate 51 and the second fixing plate 52 is provided with a locking opening slot 54, the locking opening slot 54 is provided with a locking hole 55, the locking hole 55 is two, the arc-shaped locking plate 42 is provided with a locking column 43 capable of being embedded into the locking hole 55, the locking column 43 is two, the movable rod on the arc-shaped locking plate 42 moves in the end passage, so that the arc-shaped locking plate 42 has two positions: an unlocking position and a locking position, in the unlocking position, the arc-shaped locking plate 42 is far away from the end of the connecting rod 41; in the locking position, the arc-shaped locking plate 42 is close to the end of the connecting rod 41. When the cylindrical shell 11 and the intermediate cylinder 21, the intermediate cylinder 21 and the drop liquid cylinder 31, the cylindrical shell 11 and the drop liquid cylinder 31 are connected and installed, in the initial state, the arc-shaped locking plate 42 is in the unlocking position, at this time, the connecting rod 41 can be embedded into the installation groove 53 correspondingly, when the connecting rod 41 is now limited and fixed, the arc-shaped locking plate 42 can be pushed to the locking position, at this time, the locking column 43 on the arc-shaped locking plate 42 is embedded into the locking hole 55, so that the arc-shaped locking plate 42 and the first fixing plate 51 and the second fixing plate 52 are fixedly connected together.

[0042] The above only describes certain exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. A multilayer filtration device with a water-soluble filter membrane, characterized in that, include: A filtration mechanism includes a cylindrical outer shell, a bottom connecting member at the bottom of the cylindrical outer shell, a filtration chamber formed inside the cylindrical outer shell, and at least two filter screens arranged transversely inside the filtration chamber. The aperture of the filter holes on the filter screens gradually decreases from the top to the bottom of the cylindrical outer shell. An intermediate connecting mechanism includes an intermediate cylinder of the same size as the cylindrical outer shell. A top fixing member is provided at the top of the intermediate cylinder, and a bottom connecting member is provided at the bottom of the intermediate cylinder. A conical guide is provided inside the intermediate cylinder, and a bottom liquid outlet is provided at the bottom of the conical guide. A central liquid outlet is connected to the bottom liquid outlet. A suction cavity is formed between the conical guide, the central liquid outlet, and the inner wall of the intermediate cylinder. A suction mounting hole communicating with the suction cavity is provided on the side wall of the intermediate cylinder, and a suction tube is detachably installed in the suction mounting hole. A bottom dripping mechanism includes a dripping cylinder, a top fixing member at the top of the dripping cylinder, and a filter head at the bottom of the dripping cylinder.

2. The multilayer filtration device with water-soluble filter membrane according to claim 1, characterized in that, The bottom of the dripping cylinder is provided with a dripping output pipe, and the filter head includes a filter plate and a connecting pipe provided on the filter plate, the connecting pipe being connected to the dripping output pipe.

3. The multilayer filtration device with water-soluble filter membrane according to claim 2, characterized in that, The filter disc is equipped with a bottom filter element.

4. The multi-layer filtration device with water-soluble filter membrane according to claim 1, characterized in that, The filter screen includes a first filter screen body and a second filter screen body. The first filter screen body is disposed directly above the second filter screen body. The diameter of the first filter hole on the first filter screen body is larger than the diameter of the second filter hole on the second filter screen body.

5. The multilayer filtration device with water-soluble filter membrane according to claim 4, characterized in that, A filter head is provided on the bottom liquid inlet.

6. The multilayer filtration device with water-soluble filter membrane according to claim 1, characterized in that, The bottom connecting member includes at least two connecting rods, which are fixedly installed on the bottom side wall of the cylindrical outer shell or intermediate cylinder, and the ends of the connecting rods are movably provided with arc-shaped locking plates.

7. The multilayer filtration device with water-soluble filter membrane according to claim 6, characterized in that, The top fixing component includes at least two fixing bodies, which are fixedly installed on the top side wall of the intermediate cylinder or the dripping cylinder, and the fixing bodies are correspondingly arranged with the connecting rod.

8. The multilayer filtration device with water-soluble filter membrane according to claim 7, characterized in that, The fixing body includes a first fixing plate and a second fixing plate disposed opposite to each other, and a mounting groove is formed between the first fixing plate and the second fixing plate for the connecting rod to be embedded therein.

9. The multilayer filtration device with water-soluble filter membrane according to claim 8, characterized in that, The first fixing plate and the second fixing plate are provided with locking opening slots at their ends, and locking holes are provided on the locking opening slots. The arc-shaped locking plate is provided with locking pins that can be embedded into the locking holes.

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