CN114509370A - Detection device capable of detecting various building materials and use method - Google Patents
Detection device capable of detecting various building materials and use method Download PDFInfo
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- CN114509370A CN114509370A CN202011285289.8A CN202011285289A CN114509370A CN 114509370 A CN114509370 A CN 114509370A CN 202011285289 A CN202011285289 A CN 202011285289A CN 114509370 A CN114509370 A CN 114509370A
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- 239000004566 building material Substances 0.000 title claims abstract description 116
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 239000011148 porous material Substances 0.000 claims description 11
- 241001233242 Lontra Species 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000008034 disappearance Effects 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000007769 metal material Substances 0.000 description 3
- 239000011368 organic material Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002986 polymer concrete Substances 0.000 description 1
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- 229920001059 synthetic polymer Polymers 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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Abstract
The invention belongs to the technical field of building material detection, and particularly relates to a detection device capable of detecting various building materials, which comprises a bottom plate, wherein the upper surface of the bottom plate is fixedly connected with the lower surface of a connecting plate a, the right side surface of the connecting plate a is provided with a placing groove, bearings are clamped on the upper surface and the lower surface of the inner wall of the placing groove a, the two bearings are respectively sleeved at the top end and the bottom end of a threaded column a, through the arrangement of the connecting plate a, a connecting plate b, the threaded column a, a connecting plate b, the bottom plate, a water tank, a valve and a collecting box, people place the building materials to be detected at a screen plate on the upper surface of the bottom plate, when the building material body absorbs water, the water falls into the collecting box through the screen plate below the building material body for storage, and when the detection is finished, people calculate the amount of the water absorbed by the building material body through the water missing from the water tank and the water in the collecting box, thereby detect the building material body.
Description
Technical Field
The invention belongs to the technical field of building material detection, and particularly relates to a detection device capable of detecting various building materials and a use method thereof.
Background
Construction materials are various materials used in construction works. The building materials are various in types, and are roughly divided into: inorganic materials including metallic materials and non-metallic materials, organic materials including plant materials, synthetic polymer materials and asphalt materials, and composite materials including asphalt concrete, polymer concrete and the like, which are generally compounded by inorganic non-metallic materials and organic materials.
When the traditional building material is detected, most of the traditional building materials only detect the strength of the traditional building material, but cannot detect the density, the pore, the water resistance, the impermeability and the like, so that the waterproof and impermeability performances of the traditional building material cannot be guaranteed after the traditional building material is used.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a detection device capable of detecting various building materials and a using method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: a detection device capable of detecting various building materials comprises a bottom plate, wherein the upper surface of the bottom plate is fixedly connected with the lower surface of a connecting plate a, a placing groove is formed in the right side surface of the connecting plate a, bearings are clamped on the upper surface and the lower surface of the inner wall of the placing groove a, the two bearings are respectively sleeved at the top end and the bottom end of a threaded column a, the top end of the threaded column a is fixedly connected with the lower surface of a handle a, the outer surface of the threaded column a is in threaded connection with a threaded sleeve a, the right side surface of the threaded sleeve a is fixedly connected with the left side surface of a connecting plate b, a placing groove b is formed in the upper surface of the connecting plate b, the left side surface and the right side surface of the placing groove b are respectively clamped with bearings, the two bearings are respectively sleeved on the left side and the right side of the outer surface of the connecting plate b, the right end of the connecting plate b is fixedly connected with the left side surface of the handle b, and the outer surface of the connecting plate b is sleeved with the threaded sleeve b, the front of thread bush b and solid fixed ring's back fixed connection, gu the laminating of fixed ring's inner wall and the surface of water tank, the water catch bowl has been seted up to the right flank of bottom plate, the lower surface of water catch bowl inner wall and the lower surface sliding connection of water catch bowl.
Preferably, a level meter is arranged on the right side face of the bottom plate, and the level meter and the bottom plate are parallel to each other.
Preferably, a timer is arranged on the right side surface of the bottom plate
Preferably, the bottom of the water tank is conical, the lower surface of the water tank is communicated with one end of a leakage pipe, and a valve is arranged on the right side surface of the leakage pipe
Preferably, the fixing ring is made of rubber
Preferably, the front and the back of the inner wall of the connecting plate a are both provided with a sliding groove, the front and the back of the inner wall of the two sliding grooves are respectively in sliding connection with the front and the back of the two sliding blocks, and the opposite surfaces of the two sliding blocks are respectively fixedly connected with the front and the back of the threaded sleeve b
Preferably, the upper surface of the bottom plate is provided with a through hole, and the inner wall of the through hole is fixedly connected with the outer surface of the screen plate
Preferably, the length of the connecting plate b is greater than that of the net plate
A use method of a detection device capable of detecting various building materials comprises the following use steps:
s1: people place the bottom plate at a horizontal position through the level gauge to prevent the building material from deviating due to the deflection of the bottom plate, and people place the building material to be detected at the screen plate on the upper surface of the bottom plate and fill the water tank with water;
s2: people rotate the handle a to drive the threaded column a to rotate, the threaded column a rotates to drive the threaded sleeve a to move up and down, people adjust the proper height according to the building material body required to be detected, and meanwhile, the threaded sleeve a moves up and down to drive the sliding block to move up and down in the sliding chute, so that the threaded sleeve a is more stable when moving up and down;
s3: people rotate the handle b to drive the connecting plate b to rotate, the connecting plate b rotates to drive the threaded sleeve a to move left and right on the outer surface of the threaded column, and people rotate the handle b to drive the threaded sleeve b and the water tank to move to the center of the upper surface of the building material body;
s4: the timer is started, people rotate the valve to control the water dripping speed of the drain pipe, the larger the drain pipe is opened, the faster the water dripping speed is, but the larger the extra consumption of water is, the detection result is relatively fuzzy, the drain pipe is opened small, the water dripping speed is low, but the consumption of water is low, and the detection result is relatively fine;
s5: the water drops fall on the upper surface of the building material body, the density and the pores of the building material body determine the water absorption rate of the building material body, the more the building material body absorbs water, the less the density and the more the pores of the building material body are, the poor water resistance, the poor impermeability and the low strength are, and the less the building material body absorbs water, the higher the density and the fewer the pores of the building material body are, the good water resistance, the good impermeability and the high strength are;
s6: the water droplet falls in the upper surface of building material body, and after the building material body was full, water was preserved in falling into the header tank through the otter board of building material body below, and after the detection, people calculated through the water to the water that lacks in the water tank and the water in the header tank and reachs what of the absorptive water of building material body to detect the building material body.
Compared with the prior art, the invention has the beneficial effects that:
the invention, through setting up the connection board a, connection board b, threaded post a, connection board b, bottom plate, water tank, valve and collecting box, people will need the building material that detects to place in the screen board of the upper surface of bottom plate, fill up water in the water tank at the same time, rotate handle a to drive the threaded sleeve a to move up and down, adjust the appropriate height according to the building material body that oneself needs to detect, rotate handle b to drive the threaded sleeve a to move to the side-to-side movement of threaded post outer surface, people rotate handle b to drive threaded sleeve b and water tank to move to the centre of the upper surface of the building material body, rotate the valve to control the speed that the leak pipe drips, the larger the leak pipe is opened, the speed that drips is faster, but the extra consumption of water is bigger, the detection result is relatively fuzzy, the leak pipe is opened smallly, the speed that drips is slow, but the consumption of water, the detection result is relatively meticulous, the water drips on the upper surface of the building material body, the density and the hole of building material body itself have decided the water absorption rate of building material body, the building material body absorbs water more, then the density of building material body is little, the hole is many, and waterproof not good, impermeability is not good and intensity is not high, the building material body absorbs water less, then the density of building material body is high, the hole is few, and waterproof good, impermeability is good and intensity is high, the water droplet is at the upper surface of building material body, after the building material body absorbs water fully, water falls into the header tank through the otter board of building material body below and preserves, after the detection, people calculate through the water that misses in the water tank and the water in the header tank and draw what of building material body absorptive water, thereby detect the building material body.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of a half-section structure of the present invention;
FIG. 3 is a right-side view of a half-section structure of the present invention;
in the figure: 1. a base plate; 2. a level gauge; 3. a screen plate; 4. a building material body; 5. a water collection tank; 6. a connecting plate a; 7. a threaded post a; 8. a threaded sleeve a; 9. a water tank; 10. a fixing ring; 11. a connecting plate b; 12. a connecting plate b; 13. a leak pipe; 14. a threaded sleeve b; 15. a timer; 16. a slide block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides the following technical solutions: a detection device capable of detecting multiple building materials comprises a base plate 1, wherein the upper surface of the base plate 1 is fixedly connected with the lower surface of a connecting plate a6, a placing groove is formed in the right side surface of the connecting plate a6, bearings are clamped on the upper surface and the lower surface of the inner wall of the placing groove a, the two bearings are respectively sleeved at the top end and the bottom end of a threaded column a7, the top end of the threaded column a7 is fixedly connected with the lower surface of a handle a, a threaded sleeve a8 is connected to the outer surface of the threaded column a7 in a threaded manner, the right side surface of the threaded sleeve a8 is fixedly connected with the left side surface of a connecting plate b11, a placing groove b is formed in the upper surface of a connecting plate b11, bearings are clamped on the left side surface and the right side surface of the placing groove b, the two bearings are respectively sleeved on the left side and the right side of the outer surface of a connecting plate b12, and the right end of a connecting plate b12 is fixedly connected with the left side surface of a handle b, the surface of connecting plate b12 has cup jointed thread bush b14, the front of thread bush b14 and the back fixed connection of solid fixed ring 10, gu the outer surface laminating of solid fixed ring 10's inner wall and water tank 9, the water catch bowl has been seted up to the right flank of bottom plate 1, the lower surface of water catch bowl inner wall and the lower surface sliding connection of header tank 5.
Specifically, through setting up the right flank of bottom plate 1 is provided with spirit level 2, be parallel to each other between spirit level 2 and the bottom plate 1, people place bottom plate 1 in the horizontally position through spirit level 2, prevent that bottom plate 1 from placing crooked building material skew and leading to the skew.
Specifically, through setting up the right flank of bottom plate 1 is provided with time-recorder 15, and people open time-recorder 15 when detecting, and time-recorder 15 can be taken notes the time that detects, avoids people to forget.
Specifically, through setting up the shape of water tank 9 bottom is the cone, the lower surface of water tank 9 is linked together with the one end of bushing 13, the right flank of bushing 13 is provided with the valve, and people rotate the valve and control the speed that bushing 13 drips, and bushing 13 opens more greatly, and the speed of dripping is fast more, but the extra consumption of water is big more, and the testing result is fuzzy relatively, and bushing 13 opens for a short time, and the speed of dripping is slow, but the consumption of water is slow, and the testing result is meticulous relatively.
Specifically, through setting up the material of solid fixed ring 10 is the rubber material, and the solid fixed ring 10 of rubber material can increase the frictional force of solid fixed ring 10 inner wall and the 9 surfaces of water tank, avoids water tank 9 to appear rocking at the in-process that detects.
Specifically, through setting up the spout has all been seted up to the front and the back of connecting plate a6 inner wall, and the front and the back of two spout inner walls respectively with the front and the back sliding connection of two sliders 16, and the one side that two sliders 16 are relative respectively with the front and the back fixed connection of thread bush b14, thread bush a8 reciprocates and drives slider 16 and reciprocate in the spout, can make thread bush a8 more stable when reciprocating.
Specifically, through setting up the through-hole has been seted up to the upper surface of bottom plate 1, the inner wall of through-hole and the outer fixed surface of otter board 3 are connected, and the water droplet falls in the upper surface of building material body 4, and after building material body 4 was fully absorbed, water was preserved in falling into header tank 5 through otter board 3 of building material body 4 below, after the detection, people calculated through the water to disappearance in the water tank 9 and the water in the header tank 5 and reachd what of building material body 4 absorptive water to detect building material body 4.
Specifically, the length of the connecting plate b11 is larger than that of the net plate 3, so that the handle b is rotated by a person to drive the connecting plate b12 to move the water tank 9 to the center of the upper surface of the building material body 4.
Example 1
S1: people place the bottom plate 1 at a horizontal position through the level 2 to prevent the building materials from deviating caused by the deflection of the placement of the bottom plate 1, and people place the building materials to be detected at the screen 3 on the upper surface of the bottom plate 1 and fill the water tank 9 with water;
s2: people rotate the handle a to drive the threaded column a7 to rotate, the threaded column a7 rotates to drive the threaded sleeve a8 to move up and down, people adjust the proper height according to the building material body 4 needing to be detected, and meanwhile, the threaded sleeve a8 moves up and down to drive the sliding block 16 to move up and down in the sliding groove, so that the threaded sleeve a8 is more stable when moving up and down;
s3: people rotate the handle b to drive the connecting plate b12 to rotate, the connecting plate b12 rotates to drive the threaded sleeve a8 to move left and right on the outer surface of the threaded column, and people rotate the handle b to drive the threaded sleeve b14 and the water tank 9 to move to the center of the upper surface of the building material body 4;
s4: the timer 15 is started, people rotate the valve to control the water dropping speed of the drain pipe 13, the larger the drain pipe 13 is opened, the faster the water dropping speed is, but the larger the extra consumption of water is, the detection result is relatively fuzzy, the drain pipe 13 is opened to a small extent, the water dropping speed is low, but the consumption of water is low, and the detection result is relatively fine, and meanwhile, the timer 15 can record the detection time to avoid people forgetting;
s5: the water drops fall on the upper surface of the building material body 4, the density and the pores of the building material body 4 determine the water absorption rate of the building material body 4, the more the building material body 4 absorbs water, the lower the density and the more the pores of the building material body 4, the poor water resistance, the poor impermeability and the low strength are obtained, and the less the building material body 4 absorbs water, the higher the density and the fewer the pores of the building material body 4, the good water resistance, the good impermeability and the high strength are obtained;
s6: the water droplet falls in the upper surface of building material body 4, and after building material body 4 was full, water was preserved in falling into header tank 5 through otter board 3 of building material body 4 below, and after the detection, people calculated through the water to disappearance in the water tank 9 and the water in the header tank 5 and reachs what of building material body 4 absorptive water to detect building material body 4.
The working principle and the using process of the invention are as follows: in the invention, when in use, people place the building material to be detected at the screen 3 on the upper surface of the bottom plate 1, simultaneously fill water in the water tank 9, rotate the handle a to drive the threaded sleeve a8 to move up and down, adjust the proper height according to the building material body 4 to be detected, rotate the handle b to drive the threaded sleeve a8 to move left and right on the outer surface of the threaded column, rotate the handle b to drive the threaded sleeve b14 and the water tank 9 to move to the center of the upper surface of the building material body 4, rotate the valve to control the dripping speed of the drain pipe 13, the larger the drain pipe 13 is opened, the faster the dripping speed is, but the larger the extra consumption of water is, the detection result is relatively fuzzy, the drain pipe 13 is opened little, the dripping speed is slow, but the consumption of water is slow, the detection result is relatively fine, water drops on the upper surface of the building material body 4, the density and the pore space of the building material body 4 determine the water absorption rate of the building material body 4, building material body 4 absorbs water more, then building material body 4's density is little, the hole is many, and waterproof not good, impermeability is not good and intensity is not high, building material body 4 absorbs water less, then building material body 4's density is high, the hole is few, and waterproof good, impermeability is good and intensity is high, the water droplet falls in building material body 4's upper surface, after building material body 4 absorbs water and is full, water falls into header tank 5 through otter board 3 of building material body 4 below and preserves, after the detection, people calculate through the water that misses in the water tank 9 and the water in the header tank 5 and draw what of building material body 4 absorptive water, thereby detect building material body 4.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A detection device capable of detecting multiple building materials comprises a base plate (1) and is characterized in that: the upper surface of the bottom plate (1) is fixedly connected with the lower surface of a connecting plate a (6), the right side surface of the connecting plate a (6) is provided with a placing groove, the upper surface and the lower surface of the inner wall of the placing groove a are respectively clamped with bearings, the two bearings are respectively sleeved at the top end and the bottom end of a threaded column a (7), the top end of the threaded column a (7) is fixedly connected with the lower surface of a handle a, the outer surface of the threaded column a (7) is in threaded connection with a threaded sleeve a (8), the right side surface of the threaded sleeve a (8) is fixedly connected with the left side surface of a connecting plate b (11), the upper surface of the connecting plate b (11) is provided with a placing groove b, the left side surface and the right side surface of the placing groove b are respectively clamped with bearings, the two bearings are respectively sleeved at the left side and the right side of the outer surface of a connecting plate b (12), and the right end of the connecting plate b (12) is fixedly connected with the left side surface of the handle b, threaded sleeve b (14) has been cup jointed to the surface of connecting plate b (12), the front of threaded sleeve b (14) and the back fixed connection who gu fixed ring (10), gu the inner wall of fixed ring (10) and the surface laminating of water tank (9), the water catch bowl has been seted up to the right flank of bottom plate (1), the lower surface of water catch bowl inner wall and the lower surface sliding connection of header tank (5).
2. The detectable multiple building material detection device of claim 1, wherein: the right side face of the bottom plate (1) is provided with a level meter (2), and the level meter (2) is parallel to the bottom plate (1).
3. The detectable multiple building material detection device of claim 2, wherein: the right side surface of the bottom plate (1) is provided with a timer (15).
4. The detectable multiple building material detection device of claim 1, wherein: the bottom of the water tank (9) is conical, the lower surface of the water tank (9) is communicated with one end of a leakage pipe (13), and a valve is arranged on the right side surface of the leakage pipe (13).
5. The detectable multiple building material detection device of claim 1, wherein: the fixing ring (10) is made of rubber.
6. The detectable multiple building material detection device of claim 1, wherein: the front and the back of the inner wall of the connecting plate a (6) are both provided with sliding grooves, the front and the back of the inner wall of the two sliding grooves are respectively in sliding connection with the front and the back of the two sliding blocks (16), and the opposite surfaces of the two sliding blocks (16) are respectively in fixed connection with the front and the back of the threaded sleeve b (14).
7. The detectable multiple building material detection device of claim 1, wherein: the upper surface of the bottom plate (1) is provided with a through hole, and the inner wall of the through hole is fixedly connected with the outer surface of the screen plate (3).
8. The detectable multiple building material detection device of claim 1, wherein: the length of the connecting plate b (11) is larger than that of the net plate (3).
9. The method for using a detectable multiple building material detection device according to any one of claims 1-8, wherein: the use steps are as follows:
s1: people place the bottom plate (1) at a horizontal position through the level gauge (2) to prevent the bottom plate (1) from being placed obliquely to cause the deviation of building materials, people place the building materials to be detected at the screen plate (3) on the upper surface of the bottom plate (1), and simultaneously fill the water tank (9) with water;
s2: people rotate the handle a to drive the threaded column a (7) to rotate, the threaded column a (7) rotates to drive the threaded sleeve a (8) to move up and down, people adjust the proper height according to the building material body (4) to be detected, and meanwhile, the threaded sleeve a (8) moves up and down to drive the sliding block (16) to move up and down in the sliding chute, so that the threaded sleeve a (8) is more stable when moving up and down;
s3: people rotate the handle b to drive the connecting plate b (12) to rotate, the connecting plate b (12) rotates to drive the threaded sleeve a (8) to move left and right on the outer surface of the threaded column, and people rotate the handle b to drive the threaded sleeve b (14) and the water tank (9) to move to the center of the upper surface of the building material body (4);
s4: the timer (15) is started, people rotate the valve to control the water dropping speed of the drain pipe (13), the larger the drain pipe (13) is started, the faster the water dropping speed is, but the larger the extra consumption of water is, the detection result is relatively fuzzy, the smaller the drain pipe (13) is started, the slower the water dropping speed is, but the water consumption is low, the detection result is relatively fine, and meanwhile, the timer (15) can record the detection time to avoid people forgetting;
s5: the water drops fall on the upper surface of the building material body (4), the water absorption rate of the building material body (4) is determined by the density and the pores of the building material body (4), the more the building material body (4) absorbs water, the less the density and the more the pores of the building material body (4), the poor water resistance, the poor impermeability and the low strength are realized, and the less the water absorption of the building material body (4) is, the higher the density and the fewer the pores of the building material body (4), the good water resistance, the good impermeability and the high strength are realized;
s6: the water droplet falls in the upper surface of building material body (4), and after building material body (4) absorbed water and full, water was preserved in falling into header tank (5) through otter board (3) of building material body (4) below, after detecting, people calculated through the water to disappearance in water tank (9) and the water in header tank (5) and reachd what of building material body (4) absorptive water to detect building material body (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011285289.8A CN114509370A (en) | 2020-11-17 | 2020-11-17 | Detection device capable of detecting various building materials and use method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011285289.8A CN114509370A (en) | 2020-11-17 | 2020-11-17 | Detection device capable of detecting various building materials and use method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206593999U (en) * | 2017-03-30 | 2017-10-27 | 陕西国防工业职业技术学院 | A kind of high hydroscopic resin water absorbing properties test device |
| CN211206125U (en) * | 2019-12-17 | 2020-08-07 | 济宁鸿启建设工程检测有限公司 | Building material hydroscopicity detection device |
| CN211856252U (en) * | 2020-02-27 | 2020-11-03 | 重庆工程职业技术学院 | Building material hydroscopicity detection device |
-
2020
- 2020-11-17 CN CN202011285289.8A patent/CN114509370A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206593999U (en) * | 2017-03-30 | 2017-10-27 | 陕西国防工业职业技术学院 | A kind of high hydroscopic resin water absorbing properties test device |
| CN211206125U (en) * | 2019-12-17 | 2020-08-07 | 济宁鸿启建设工程检测有限公司 | Building material hydroscopicity detection device |
| CN211856252U (en) * | 2020-02-27 | 2020-11-03 | 重庆工程职业技术学院 | Building material hydroscopicity detection device |
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