CN211877228U

CN211877228U - Detection equipment with different vibration signal analysis and alarm capabilities

Info

Publication number: CN211877228U
Application number: CN202020625650.6U
Authority: CN
Inventors: 李耀均; 邓伟锋; 陈晓波; 陈灿林
Original assignee: Shenzhen SDG Information Co Ltd
Current assignee: Shenzhen SDG Information Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-11-06
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a have to different vibration signal analysis and alarm capability check out test set, including the box, the inside movable mounting of box has the detection body, and the equal fixedly connected with seat foot in both sides of bottom half, the right side at box top has been seted up and has been led to the groove, the utility model relates to a check out test set technical field. This have to different vibration signal analysis and alarm capability check out test set, through seting up logical groove on the right side at the box top, utilize and detect the body and slide logical inslot wall, adjust about detecting the body through sliding seat and fixing base, can accomodate when detecting the body and not using, avoid exposing for a long time and accumulate the dust outward, cause the instrument to detect the precision and reduce, the air pump in the cooperation dust removal mechanism, utilize the intake pipe to bleed, the outlet duct blows with blowing dust hose, clear up the dust on control panel surface in real time, the cooperation diaphragm, magnetic block and magnetic domain, conveniently fix and place blowing dust hose, high durability and convenient use.

Description

Detection equipment with different vibration signal analysis and alarm capabilities

Technical Field

The utility model relates to a check out test set technical field specifically is a have to different vibration signal analysis and alarm capability check out test set.

Background

The detection equipment has a great variety, and the detection equipment that the mill commonly used has a lot of, including measuring equipment slide caliper rule, balance, dotter etc. in addition also has quality testing analytical instrument, and material quality testing, packing check out test set etc. are common check out test set. In the packaging process, a packaging material detector, a metal detection device, a nonmetal detection device, a nondestructive detection device and the like are common. With the development of the times, various high-tech products are continuously updated and released to the market in order to prevent unqualified products from being produced. The use of a detection device is necessary to effectively reduce the influx of products into the market that do not comply with national standards.

The existing detection equipment with the functions of analyzing different vibration signals and alarming is characterized in that a detection body is usually exposed in the air, and is shielded through cloth when not used, dust is easily accumulated inside the detection body, the dust enters the detection body and is reduced in detection precision, an instrument needs to be frequently cleaned, a key is easily damaged by manual cleaning, and the operation panel is highly fixed and cannot be adjusted according to different heights of operators.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a have to different vibration signal analysis and alarm capability check out test set, solved current have to different vibration signal analysis and alarm capability check out test set, detect the inside dust that accumulates easily of body, operating panel needs often clear up, highly fixed problem.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a detection device with different vibration signal analysis and alarm capabilities comprises a box body, wherein a detection body is movably mounted in the box body, seat feet are fixedly connected to two sides of the bottom of the box body, a through groove is formed in the right side of the top of the box body, the outer surface of the detection body is in sliding connection with the inner surface of the through groove, a fixed seat is fixedly connected to the right side of the bottom of an inner cavity of the box body, a sliding seat is connected to the inner surface of the fixed seat in a sliding mode, the top of the sliding seat penetrates through the fixed seat and extends to the outside of the fixed seat, the top of the sliding seat is fixedly connected with the bottom of the detection body, support frames are movably connected to two sides of the left side of the top of the box body, a control panel is fixedly connected;

dust removal mechanism includes the air pump, the bottom of air pump and the left side fixed connection of box inner chamber bottom, the air inlet intercommunication of air pump has the intake pipe, the bottom of intake pipe runs through the box and extends to the outside of box, the gas outlet intercommunication of air pump has the outlet duct, the standing groove has been seted up in the left side at box top, and the internal surface joint of standing groove has the dust blowing hose, the top of outlet duct runs through the box and extends to the inside of standing groove, the top of outlet duct and the left side intercommunication of dust blowing hose surface bottom, the left top fixedly connected with diaphragm of box inner chamber, and the right side of diaphragm is provided with the magnetism region, the right side fixed connection of dust blowing hose surface bottom has the magnetism piece, and the bottom of magnetism piece and the top contact of magnetism region.

Preferably, the lifting mechanism is arranged on the inner side of the left side in the box body and comprises a case, the bottom of the case is fixedly connected with the bottom of the inner cavity of the box body, a driving motor is fixedly connected in the case, and one end of an output shaft of the driving motor is fixedly connected with a threaded rod through a coupler.

Preferably, the outer surface of the threaded rod is in threaded connection with a threaded sleeve, the outer surface of the threaded sleeve is in sliding connection with the inner wall of the case, and one end of the threaded sleeve penetrates through the case and extends to the outside of the case.

Preferably, the outer surface sliding connection of machine case has the connecting seat, the one end of thread bush and the bottom fixed connection of connecting seat, two the bottom of support frame all runs through the box and extends to the inside of box, the bottom of two support frames all with the top fixed connection of connecting seat.

Preferably, the inside fixedly connected with steadying plate of detection body, the movable surface mounting of steadying plate has radiator unit, radiator unit's the circular seat of back fixedly connected with, the circular port has been seted up on steadying plate's surface, and the internal surface of circular port and the surface joint of circular seat.

Preferably, the fixture block is fixedly connected to two sides of the outer surface of the circular seat, the sliding grooves are formed in two sides of the inner wall of the circular hole, the inner surfaces of the sliding grooves are matched with the outer surface of the fixture block, the arc-shaped grooves are formed in two sides of the inner wall of the circular hole and located on one side of the sliding grooves, and the inner surfaces of the arc-shaped grooves are connected with the outer surface of the fixture block in a sliding mode.

Preferably, the first arc-shaped fixing frames are fixedly connected to two sides above the surface of the stabilizing plate, the two first arc-shaped fixing frames are rotatably connected to the surface of the arc-shaped rotating frame, the second arc-shaped fixing frames are fixedly connected to two sides below the surface of the stabilizing plate, and the surface of each arc-shaped rotating frame is fixedly connected with the surface of each second arc-shaped fixing frame through bolts.

Preferably, the two sides of the surface of the box body are rotatably connected with box doors, the surface of each box door is fixedly connected with a handle, and the back of the detection body is fixedly connected with a cover body through screws.

(III) advantageous effects

The utility model provides a have to different vibration signal analysis and alarm capability check out test set. Compared with the prior art, the method has the following beneficial effects:

(1) the detection device with the functions of analyzing different vibration signals and alarming capacity is characterized in that a through groove is formed in the right side of the top of a box body, the outer surface of a detection body is connected with the inner surface of the through groove in a sliding mode, a fixed seat is fixedly connected to the right side of the bottom of an inner cavity of the box body, a sliding seat is connected to the inner surface of the fixed seat in a sliding mode, the top of the sliding seat penetrates through the fixed seat and extends to the outside of the fixed seat, the top of the sliding seat is fixedly connected with the bottom of the detection body, support frames are movably connected to the two sides of the left side of the top of the box body; the dust removal mechanism comprises an air pump, the bottom of the air pump is fixedly connected with the left side of the bottom of the inner cavity of the box body, an air inlet of the air pump is communicated with an air inlet pipe, the bottom end of the air inlet pipe penetrates through the box body and extends to the outside of the box body, an air outlet of the air pump is communicated with an air outlet pipe, the left side of the top of the box body is provided with a placing groove, a dust blowing hose is clamped on the inner surface of the placing groove, the top end of the air outlet pipe penetrates through the box body and extends to the inside of the placing groove, the top end of the air outlet pipe is communicated with the left side of the bottom of the outer surface of the dust blowing hose, a transverse plate is fixedly connected above the left side of the inner cavity of the box body, a magnetic area is arranged on the right side of the transverse plate, a magnetic block is fixedly connected on the right side, can accomodate when detecting the body and not using, avoid exposing for a long time and accumulate the dust outside, cause the instrument to detect the precision and reduce, air pump in the cooperation dust removal mechanism utilizes the intake pipe to bleed, and the outlet duct blows with the dust blowing hose, clears up the dust on control panel surface in real time, and cooperation diaphragm, magnetic block and magnetism region are convenient fixed to be placed and are blown the dust blowing hose, convenient operation, and it is convenient to use.

(2) The detection device with the functions of analyzing different vibration signals and alarming comprises a box body, wherein an elevating mechanism is arranged on the inner side of the left side in the box body, the elevating mechanism comprises a box body, the bottom of the box body is fixedly connected with the bottom of an inner cavity of the box body, a driving motor is fixedly connected in the box body, one end of an output shaft of the driving motor is fixedly connected with a threaded rod through a coupler, the outer surface of the threaded rod is in threaded connection with a threaded sleeve, the outer surface of the threaded sleeve is in sliding connection with the inner wall of the box body, one end of the threaded sleeve penetrates through the box body and extends to the outside of the box body, the outer surface of the box body is in sliding connection with a connecting seat, one end of the threaded sleeve is fixedly connected with the bottom of the connecting seat, the bottoms of two supporting frames penetrate through the box body and, adjust from top to bottom through thread bush and connecting seat for support frame and control panel adjust from top to bottom, and to operating personnel's height difference, adjust the height that control panel is suitable, easy operation not only, convenient to use moreover.

(3) The detection device with the functions of analyzing different vibration signals and alarming comprises a detection body, wherein a stabilizing plate is fixedly connected inside the detection body, a heat dissipation assembly is movably arranged on the surface of the stabilizing plate, a circular seat is fixedly connected to the back surface of the heat dissipation assembly, a circular hole is formed in the surface of the stabilizing plate, the inner surface of the circular hole is clamped with the outer surface of the circular seat, clamping blocks are fixedly connected to two sides of the outer surface of the circular seat, sliding grooves are formed in two sides of the inner wall of the circular hole, the inner surfaces of the two sliding grooves are matched with the outer surface of the clamping blocks, arc-shaped grooves are formed in two sides of the inner wall of the circular hole and located at one side of the sliding grooves, the inner surfaces of the two arc-shaped grooves are in sliding connection with the outer surface of the clamping blocks, first arc-shaped fixing frames are fixedly connected to two sides above the surface of the, bolt fixed connection is all passed through with the surface of second arc mount on the surface of two arc rotating turret, through setting up radiator unit, can be detecting body during operation, dispel heat to its inside, cooperation circular seat, the circular port, the fixture block, spout and arc wall can be with radiator unit preliminary fixation on the steadying plate, through first arc mount, second arc mount, arc rotating turret and bolt fasten radiator unit, the convenience is dismantled radiator unit, it is more convenient to overhaul.

Drawings

Fig. 1 is a perspective view of the external structure of the present invention;

FIG. 2 is a front view of the internal structure of the present invention;

fig. 3 is a sectional view of the internal structure of the lifting mechanism of the present invention;

FIG. 4 is a perspective view of the external structure of the detecting body of the present invention;

fig. 5 is a front view of the mounting structure of the heat dissipating assembly of the present invention;

fig. 6 is a sectional view of the mounting structure of the heat dissipating assembly of the present invention.

In the figure, 1-box body, 2-detection body, 3-seat foot, 4-through groove, 5-fixed seat, 6-sliding seat, 7-supporting frame, 8-control panel, 9-dust removal mechanism, 91-air pump, 92-air inlet pipe, 93-air outlet pipe, 94-placing groove, 95-dust blowing hose, 96-transverse plate, 97-magnetic area, 98-magnetic block, 10-lifting mechanism, 101-cabinet, 102-driving motor, 103-threaded rod, 104-threaded sleeve, 105-connecting seat, 11-stabilizing plate, 12-radiating component, 13-round seat, 14-round hole, 15-clamping block, 16-sliding groove, 17-arc groove, 18-first arc fixing frame, 19-arc rotating frame, 20-a second arc-shaped fixing frame, 21-a bolt, 22-a box door, 23-a handle, 24-a screw and 25-a cover body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, an embodiment of the present invention provides a technical solution: a detection device with different vibration signal analysis and alarm capabilities comprises a box body 1, two sides of the surface of the box body 1 are rotatably connected with box doors 22, the box doors 22 can be opened to overhaul the interior of the box body 1, the surfaces of the two box doors 22 are fixedly connected with handles 23, the back surface of a detection body 2 is fixedly connected with a cover body 25 through screws 24, the cover body 25 can be opened to overhaul the interior of the detection body 2, the inner side of the left side of the interior of the box body 1 is provided with a lifting mechanism 10, the lifting mechanism 10 comprises a box 101, the outer surface of the box 101 is slidably connected with a connecting seat 105, one end of a threaded sleeve 104 is fixedly connected with the bottom of the connecting seat 105, the bottoms of two support frames 7 penetrate through the box body 1 and extend to the interior of the box body 1, the bottoms of the two support frames 7 are fixedly connected with the top of the connecting, the internal of the case 101 is fixedly connected with a driving motor 102, the driving motor 102 is a three-phase asynchronous motor and is electrically connected with an external power supply, one end of an output shaft of the driving motor 102 is fixedly connected with a threaded rod 103 through a coupler, the outer surface of the threaded rod 103 is in threaded connection with a threaded sleeve 104, the outer surface of the threaded sleeve 104 is in sliding connection with the inner wall of the case 101, one end of the threaded sleeve 104 penetrates through the case 101 and extends to the outside of the case 101, a detection body 2 is movably mounted in the case 1, the detection body 2 can analyze and alarm aiming at different vibration signals, the internal of the detection body 2 is fixedly connected with a stabilizing plate 11, two sides above the surface of the stabilizing plate 11 are fixedly connected with first arc-shaped fixing frames 18, the surfaces of the two first arc-shaped fixing frames 18 are rotatably connected with arc-shaped rotating frames 19, rubber pads are fixed on the inner wall of the arc-, the surfaces of the two arc-shaped rotating frames 19 are fixedly connected with the surface of a second arc-shaped fixing frame 20 through bolts 21, the surface of the stabilizing plate 11 is movably provided with a heat dissipation assembly 12, the heat dissipation assembly 12 is the existing heat dissipation technology, a motor, a shell, a fan and the like, the back of the heat dissipation assembly 12 is fixedly connected with a circular seat 13, two sides of the outer surface of the circular seat 13 are fixedly connected with clamping blocks 15, two sides of the inner wall of the circular hole 14 are respectively provided with a sliding groove 16, the inner surfaces of the two sliding grooves 16 are respectively matched with the outer surface of the clamping block 15, two sides of the inner wall of the circular hole 14 and one side of the sliding groove 16 are respectively provided with an arc-shaped groove 17, the inner surfaces of the two arc-shaped grooves 17 are respectively connected with the outer surface of the clamping block 15 in a sliding manner, the surface of the stabilizing, a through groove 4 is formed in the right side of the top of the box body 1, the outer surface of the detection body 2 is connected with the inner surface of the through groove 4 in a sliding manner, a fixed seat 5 is fixedly connected to the right side of the bottom of an inner cavity of the box body 1, a hydraulic rod is arranged inside the fixed seat 5, the output end of the hydraulic rod is fixed to the bottom of a sliding seat 6, a sliding seat 6 is connected to the inner surface of the fixed seat 5 in a sliding manner, the top of the sliding seat 6 penetrates through the fixed seat 5 and extends to the outside of the fixed seat 5, the top of the sliding seat 6 is fixedly connected with the bottom of the detection body 2, support frames 7 are movably connected to the left sides of the top of the box body; the dust removing mechanism 9 comprises an air pump 91, the air pump 91 is electrically connected with an external power supply, the bottom of the air pump 91 is fixedly connected with the left side of the bottom of the inner cavity of the box body 1, an air inlet pipe 92 is communicated with an air inlet of the air pump 91, the bottom end of the air inlet pipe 92 penetrates through the box body 1 and extends to the outside of the box body 1, an air outlet pipe 93 is communicated with an air outlet of the air pump 91, a placing groove 94 is formed in the left side of the top of the box body 1, a dust blowing hose 95 is clamped on the inner surface of the placing groove 94, the top end of the air outlet pipe 93 penetrates through the box body 1 and extends to the inside of the placing groove 94, the top end of the air outlet pipe 93 is communicated with the left side of the bottom of the outer surface of the dust blowing hose 95, a transverse plate 96 is fixedly connected above the left side of the inner cavity of the box body 1, a magnetic area 97 is, through setting up logical groove 4 on the right side at box 1 top, utilize and detect body 2 and slide at logical groove 4 inner wall, adjust about detecting body 2 through sliding seat 6 and fixing base 5, can accomodate when detecting body 2 does not use, avoid exposing for a long time and accumulate the dust outward, cause the instrument to detect the precision and reduce, air pump 91 in the cooperation dust removal mechanism 9, utilize intake pipe 92 to bleed, outlet duct 93 and dust blowing hose 95 blow, clear up the dust on control panel 8 surface in real time, cooperation diaphragm 96, magnetic block 98 and magnetic region 97, conveniently fix and place dust blowing hose 95, high durability and convenient use, simultaneously the content that does not make detailed description in this description all belongs to the well-known prior art of technical staff in the field.

When the dust blowing hose cleaning device is used, firstly, a hydraulic rod in the fixed seat 5 is started, the sliding seat 6 is driven by the hydraulic rod to move upwards on the inner surface of the fixed seat 5, the sliding seat 6 drives the detection body 2 to move upwards, the detection body 2 is ejected out of the box body 1, analysis and alarm can be performed on different vibration signals through the detection body 2, according to the height of an operator, the driving motor 102 is started, the driving motor 102 drives the threaded rod 103 to rotate, the threaded rod 103 is used for rotating to drive the threaded sleeve 104 to move upwards and downwards, the threaded sleeve 104 moves upwards and downwards to enable the connecting seat 105 to move upwards and downwards, the connecting seat 105 then drives the supporting frame 7 to move upwards and downwards, the supporting frame 7 moves upwards and downwards to drive the control panel 8 to move upwards and downwards to adjust the proper height, when the control panel 8 needs to be cleaned, the dust blowing hose 95 is taken out of, then start air pump 91, bleed through intake pipe 92, intake pipe 92 bleeds the back and gives vent to anger through outlet duct 93, outlet duct 93 gives vent to anger and makes dust blowing hose 95 give vent to anger, handheld dust blowing hose 95 clear up control panel 8 can, after the completion, reverse operation resume initial state can, when needing to dismantle radiator unit 12, take off bolt 21, make two second arc mount 20 break away from radiator unit 12, make second arc mount 20 rotate, radiator unit 12 rotates this moment, radiator unit 12 rotates and then drives circular seat 13 and rotates, make the fixture block 15 of circular seat 13 both sides rotate at the internal surface of arc wall 17, when fixture block 15 rotates to spout 16 departments, outwards take out radiator unit 12 this moment can, above is exactly one kind and has the theory of work to different vibration signal analysis and alarm capacity check out test set.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an have to different vibration signal analysis and alarm capability check out test set, includes box (1), the inside movable mounting of box (1) has detection body (2), the equal fixedly connected with seat foot (3) in both sides of box (1) bottom, its characterized in that: a through groove (4) is formed in the right side of the top of the box body (1), the outer surface of the detection body (2) is connected with the inner surface of the through groove (4) in a sliding manner, a fixed seat (5) is fixedly connected to the right side of the bottom of an inner cavity of the box body (1), a sliding seat (6) is connected to the inner surface of the fixed seat (5) in a sliding manner, the top of the sliding seat (6) penetrates through the fixed seat (5) and extends to the outside of the fixed seat (5), the top of the sliding seat (6) is fixedly connected with the bottom of the detection body (2), two sides of the left side of the top of the box body (1) are movably connected with supporting frames (7), a control panel (8) is fixedly connected between the tops of the two supporting frames (7), and;

the dust removal mechanism (9) comprises an air pump (91), the bottom of the air pump (91) is fixedly connected with the left side of the bottom of an inner cavity of the box body (1), an air inlet pipe (92) is communicated with an air inlet of the air pump (91), the bottom end of the air inlet pipe (92) penetrates through the box body (1) and extends to the outside of the box body (1), an air outlet pipe (93) is communicated with an air outlet pipe (91), a placement groove (94) is formed in the left side of the top of the box body (1), a dust blowing hose (95) is clamped on the inner surface of the placement groove (94), the top end of the air outlet pipe (93) penetrates through the box body (1) and extends to the inside of the placement groove (94), the top end of the air outlet pipe (93) is communicated with the left side of the bottom of the outer surface of the dust blowing hose (95), a transverse plate (96) is fixedly connected with the left upper, the right side of the bottom of the outer surface of the dust blowing hose (95) is fixedly connected with a magnetic block (98), and the bottom of the magnetic block (98) is in contact with the top of the magnetic area (97).

2. A test device with the capability of analyzing and alerting for different vibration signals according to claim 1, wherein: the improved refrigerator is characterized in that an elevating mechanism (10) is arranged on the inner side of the left side of the interior of the box body (1), the elevating mechanism (10) comprises a cabinet (101), the bottom of the cabinet (101) is fixedly connected with the bottom of the inner cavity of the box body (1), a driving motor (102) is fixedly connected with the interior of the cabinet (101), and a threaded rod (103) is fixedly connected with one end of an output shaft of the driving motor (102) through a coupler.

3. A detection device having the capability of analyzing and alerting for different vibration signals according to claim 2, wherein: the outer surface of the threaded rod (103) is connected with a threaded sleeve (104) in a threaded mode, the outer surface of the threaded sleeve (104) is connected with the inner wall of the case (101) in a sliding mode, and one end of the threaded sleeve (104) penetrates through the case (101) and extends to the outside of the case (101).

4. A detection device having the capability of analyzing and alerting for different vibration signals according to claim 3, wherein: the outer surface sliding connection of quick-witted case (101) has connecting seat (105), the bottom fixed connection of the one end of thread bush (104) and connecting seat (105), two the bottom of support frame (7) all runs through box (1) and extends to the inside of box (1), the bottom of two support frames (7) all with the top fixed connection of connecting seat (105).

5. A test device with the capability of analyzing and alerting for different vibration signals according to claim 1, wherein: detect inside fixedly connected with steadying plate (11) of body (2), the movable surface mounting of steadying plate (11) has radiator unit (12), the circular seat (13) of back fixedly connected with of radiator unit (12), circular port (14) have been seted up on the surface of steadying plate (11), and the internal surface of circular port (14) and the surface joint of circular seat (13).

6. A detection device with analysis and alarm capabilities for different vibration signals according to claim 5, wherein: the equal fixedly connected with fixture block (15) in both sides of circular seat (13) surface, spout (16), two have all been seted up to the both sides of circular port (14) inner wall the internal surface of spout (16) all with the surface looks adaptation of fixture block (15), arc wall (17), two have been seted up to the both sides of circular port (14) inner wall and the one side that is located spout (16) the internal surface of arc wall (17) all with the surface sliding connection of fixture block (15).

7. A detection device with analysis and alarm capabilities for different vibration signals according to claim 5, wherein: the surface of the stabilizing plate (11) is fixedly connected with first arc-shaped fixing frames (18) on two sides above the surface of the stabilizing plate (11), two arc-shaped rotating frames (19) are rotatably connected on the surface of the first arc-shaped fixing frames (18), second arc-shaped fixing frames (20) are fixedly connected on two sides below the surface of the stabilizing plate (11), and the surface of each arc-shaped rotating frame (19) is fixedly connected with the surface of each second arc-shaped fixing frame (20) through bolts (21).

8. A test device with the capability of analyzing and alerting for different vibration signals according to claim 1, wherein: the two sides of the surface of the box body (1) are rotatably connected with box doors (22), the surface of each box door (22) is fixedly connected with a handle (23), and the back of the detection body (2) is fixedly connected with a cover body (25) through a screw (24).