CN108827841A - A kind of dust explosion protection atmospheric detection device - Google Patents

Abstract

The invention discloses a kind of dust explosion protection atmospheric detection device, structure includes：Air circulation device, body, radiator fan, display, key, detection probe, shaft, rotary table, column, reinforcing rod, the outer wall vertical of air circulation device is fixed on the rear end of body outer wall, radiator fan is fixed by screws in the middle section on right side of machine body surface, display level is installed in the upper end of key and is electrically connected with the internal element of detection probe, the bottom end of body is vertically fixed on the center of rotary table upper end by shaft, a kind of air circulation device adjustable fan revolving speed of dust explosion protection atmospheric detection device of the invention is carried out to indoor air circulation, improved dust explosion protection atmospheric detection device can detect to dust concentration will start air circulation device once reaching preset value and carrying out forced ventilation and avoid dangerous bring loss occurring in real time.

Description

A kind of dust explosion protection atmospheric detection device

Technical field

The present invention is a kind of dust explosion protection atmospheric detection device, belongs to detection device field.

Background technique

Dust explosion refers to combustible dust within the scope of explosion limit, encounters heat source (open fire or high temperature), and flame moment passes It is sowed at entire mixed dust space, chemical reaction velocity is exceedingly fast, while discharging a large amount of heat, forms very high temperature and very big Pressure, the energy of system are converted into the radiation of mechanical energy and light and heat, have very strong destructive power, dust explosion mostly with Aluminium powder, zinc powder, aluminium product grounds travel, various plastic powders, the intermediate of organic synthesis drug, wheat flour, sugar, sawdust, dye The production and processing place of the generations such as material, bakelite ash, milk powder, tea-leaf power, tobacco powder, coal dust, plant fiber dirt

But prior art dust explosion has very strong damage capability, and the dust in workshop, which reaches certain condition, to explode Loss and the injures and deaths of personnel are brought to producer.

Summary of the invention

In view of the deficienciess of the prior art, it is an object of the present invention to provide a kind of dust explosion protection atmospheric detection device, with solution Certainly dust explosion has very strong damage capability, and the dust in workshop, which reaches certain condition and will explode, brings loss to producer, And personnel injures and deaths the problem of.

To achieve the goals above, the present invention is to realize by the following technical solutions：A kind of dust explosion protection atmosphere inspection Device is surveyed, structure includes：Air circulation device, radiator fan, display, key, detection probe, shaft, rotary table, is stood body Column, reinforcing rod, the outer wall vertical of the air circulation device are fixed on the rear end of body outer wall, and the radiator fan is solid by screw It is scheduled on the middle section on right side of machine body surface, the display level is installed in the upper end of key and the internal element with detection probe Electrical connection, the bottom end of the body are vertically fixed on the center of rotary table upper end by shaft, the column set there are three bottom and The both ends of reinforcing rod are welded and fixed, and the key sets that there are six be uniformly fixed on the front end of body outer surface, the sky in row Air-flow leads to device and is equipped with driving motor, belt pulley, rotation ratch, speed regulation knob, speed change belt wheel, gear set, fan, the driving electricity Gear on the right side of machine is flexibly connected with the gear on the left of belt pulley, the belt pulley be vertically fixed on rotation ratch bottom and Clearance fit, the speed regulation knob level are installed in the top of rotation ratch and connect with variable velocity zone wheel mechanical, the speed change Belt wheel on the left of belt wheel is flexibly connected with the gear at the top of gear set, and the gear set is horizontally fixed on the left side of fan, described Fan is vertically fixed on the left side of air circulation device inner wall by bolt；

Further, the driving motor is made of pedestal, main motor, cone pulley, driven gear, output gear, the bottom The top level of seat is welded on the lower end of main motor outer wall, and the main shaft of the main motor and the groove on the left of cone pulley are interference fitted, The external tooth of the cone pulley is intermeshed by the external tooth of driven gear and output gear, the external tooth and belt pulley of the output gear The ratch in left side is flexibly connected.

Further, the belt pulley is made of straight-tooth bar, bearing, bracket, input belt wheel, belt, T-type wheel carrier, described Straight-tooth bar level runs through the center of bearing rotor, and the bearing is set there are two the left and right sides for being vertically fixed on bracket, described defeated Enter belt wheel to set there are two the two sides up and down for being uniformly fixed on belt inner wall, the axle center of the input belt wheel is mounted on T by bolt In the groove of type wheel carrier two sides, the external tooth of the straight-tooth bar and the gear mechanism on the right side of driving motor are connected.

Further, the rotation ratch is made of sprocket wheel, line wheel, iron wire, rotation column, bearing bracket stand, input bull stick, the chain Wheel is installed in the rear end of line wheel and in same axle center, and the line wheel is cooperated by the center clearance of iron wire and rotation column outer wall, The input bull stick extends vertically through the inner wall of rotation column central axis, and the top of the input bull stick is welded on the groove of bearing bracket stand bottom It is interior.

Further, the speed regulation knob is by knob, fixture nut, spill spin block, auxiliary wheel, ball screw, cushion It forms, the internal screw thread clearance fit of external screw thread and fixture nut on the left of the knob, the ball screw is horizontally fixed on rotation The right side of switch block and flexible connection, the auxiliary wheel set that there are two the two sides up and down that spill spin block is installed in by screw, institutes State the left side that the cushion is horizontally fixed on auxiliary wheel.

Further, the speed change belt wheel is by fixed ear, torsional spring, lever arm, movable sprocket wheel, chain, variable sprocket wheel, friction Piece, adjusting yoke, movable block, regulating arm, support frame composition, the fixed ear are fixed on the rear end of torsional spring and in same axis The heart, the torsional spring are fixed on the upper end of lever arm and flexible connection, and the outer wall of the activity sprocket wheel passes through chain and variable chains The outer wall clearance fit of wheel, the friction plate set that there are two the horizontal two sides up and down for being installed in variable sprocket wheel front end, the adjustings The outer wall of pull rod is bolted on the center of movable block, and the regulating arm is scheduled on the two sides up and down of movable block, described Support frame is vertically welded in the upper end of variable sprocket wheel.

Further, the gear set is by first gear, tree-like bracket, second gear, cone bar, same to pedestal, double belt Wheel composition, the tree-like bracket of first gear second gear, the cone bar level run through the main shaft with pedestal, the double belt Wheel level is welded on the left-hand face of cone bar, and the external tooth of the second gear and the external tooth of first gear are intermeshed, described double Layer belt pulley is mechanically connected by belt and belt wheel.

Further, the fan is made of belt wheel, ball bearing, steel shaft, flabellum, reinforcing prop, and the belt wheel is vertically solid It is scheduled on the right side of ball bearing and flexible connection, the steel shaft level runs through the center of ball bearing and the axle center with flabellum Ratch on the left of interference fit, the belt wheel and gear set is mechanically connected, and the reinforcing prop is bolted on air circulation The left side of device inner wall.

Beneficial effect

It is set in a kind of dust explosion protection atmospheric detection device of the present invention by detection mainboard of the key to internal body, The data of detection probe transmission conversion are intuitively shown by display, once dust concentration is higher or temperature rises, are opened immediately Dynamic air circulation device carries out heat dissipation and indoor air circulation, prevents dust explosion caused by overheat and other conditions, empty Air-flow leads to the transmission that device is rotated into action edge by the cone pulley of internal driving motor, carries out by driven gear and output gear Straight-tooth bar is connected, input belt wheel is made to carry out power transmission under the connection of belt, input belt wheel rotation can make to input bar rotation Iron wire is driven, the frictional force that iron wire depends on and revolve between the surface of column is rotated, can when power reaches speed change belt wheel It is adjusted by adjusting the speed knob, the frictional force that spill spin block can be passed through internal whorl by ball screw when speed regulation knob rotates Mobile to keep adjusting yoke mobile, the diameter for changing the opening and closing degree of regulating arm then friction plate changes, when friction plate diameter Speed is promoted when greater than movable sprocket wheel, and then speed declines when friction plate diameter is less than movable sprocket wheel, can be avoided prominent So wind-force is excessive causes indoor dust concentration to improve suddenly, and the lever arm for being fixed on torsional spring is connect with movable sprocket wheel to be able to maintain The tension of chain prevents from skidding, and is rotated finally by gear set driving fan, and the flabellum of fan is mounted with that two are improved out Air quantity improves air circulation speed, and improved dust explosion protection atmospheric detection device can in real time detect dust concentration Will start air circulation device progress forced ventilation once reaching preset value avoids the dangerous bring that occurs from losing.

Air circulation device adjustable fan revolving speed of the invention is carried out to indoor air circulation, and improved dust explosion protection is big Gas detection device can detect to dust concentration in real time will start the progress of air circulation device once reaching preset value Forced ventilation avoids the dangerous bring that occurs from losing.

Detailed description of the invention

Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention, Objects and advantages will become more apparent upon：

Fig. 1 is a kind of surface structure schematic diagram of dust explosion protection atmospheric detection device of the present invention.

Fig. 2 is a kind of schematic diagram of internal structure of dust explosion protection atmospheric detection device of the present invention.

Fig. 3 is Fig. 2 first part of the present invention structural schematic diagram.

Fig. 4 is Fig. 2 second part structural schematic diagram of the present invention.

Fig. 5 is a kind of drive mechanism schematic diagram of dust explosion protection atmospheric detection device of the present invention.

In figure：Air circulation device -1, body -2, radiator fan -3, display -4, key -5, detection probe -6, shaft - 7, rotary table -8, column -9, reinforcing rod -10, driving motor -101, belt pulley -102, rotation ratch -103, speed regulation knob -104, Speed change belt wheel -105, gear set -106, fan -107, pedestal -1011, main motor -1012, cone pulley -1013, driven gear - 1014, output gear -1015, straight-tooth bar -1021, bearing -1022, bracket -1023, input belt wheel -1024, belt -1025, T Type wheel carrier -1026, sprocket wheel -1031, line wheel -1032, iron wire -1033, rotation column -1034, bearing bracket stand -1034, input bull stick - 1036, knob -1041, fixture nut -1042, spill spin block -1043, auxiliary wheel -1044, ball screw -1045, cushion - 1046, fixed ear -1051, torsional spring -1052, lever arm -1053, movable sprocket wheel -1054, chain -1055, variable sprocket wheel -1056, Friction plate -1057, adjusting yoke -1058, movable block -1059, regulating arm -10510, support frame -10511, first gear - 1061, tree-like bracket -1062, second gear -1063, cone bar -1064, same to pedestal -1065, double belt pulley -1066, belt wheel - 1071, ball bearing -1072, steel shaft -1073, flabellum -1074, reinforcing prop -1075.

Specific embodiment

To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to Specific embodiment, the present invention is further explained.

Fig. 1-Fig. 5 is please referred to, the present invention provides a kind of dust explosion protection atmospheric detection device：Its structure includes：Air circulation Device 1, body 2, radiator fan 3, display 4, key 5, detection probe 6, shaft 7, rotary table 8, column 9, reinforcing rod 10, the sky The outer wall vertical that air-flow leads to device 1 is fixed on the rear end of 2 outer wall of body, and the radiator fan 3 is fixed by screws in 2 right side of body The middle section on surface, 4 level of display are installed in the upper end of key 5 and are electrically connected with the internal element of detection probe 6, institute State the center that the bottom end of body 2 is vertically fixed on 8 upper end of rotary table by shaft 7, the column 9 sets that there are three bottom and reinforcing rods 10 both ends are welded and fixed, and the key 5 sets that there are six be uniformly fixed on the front end of 2 outer surface of body, the air in row The device 1 that circulates is equipped with driving motor 101, belt pulley 102, rotation ratch 103, speed regulation knob 104, speed change belt wheel 105, gear set 106, the gear of fan 107,101 right side of driving motor is flexibly connected with the gear in 102 left side of belt pulley, the belt pulley 102 be vertically fixed on rotation ratch 103 bottom and clearance fit, 104 level of speed regulation knob be installed in rotation ratch It 103 top and is mechanically connected with speed change belt wheel 105,106 top of belt wheel and gear set in 105 left side of the speed change belt wheel Gear is flexibly connected, and the gear set 106 is horizontally fixed on the left side of fan 107, and the fan 107 is vertically fixed by bolt In the left side of 1 inner wall of air circulation device, the driving motor 101 is by pedestal 1011, main motor 1012, cone pulley 1013, driven tooth Wheel 1014, output gear 1015 form, and the top level of the pedestal 1011 is welded on the lower end of 1012 outer wall of main motor, described The groove in 1013 left side of main shaft and cone pulley of main motor 1012 is interference fitted, and the external tooth of the cone pulley 1013 passes through driven gear 1014 are intermeshed with the external tooth of output gear 1015, the ratch in 102 left side of external tooth and belt pulley of the output gear 1015 It is flexibly connected, the belt pulley 102 is by straight-tooth bar 1021, bearing 1022, bracket 1023, input belt wheel 1024, belt 1025, T Type wheel carrier 1026 forms, the horizontal center for running through 1022 rotor of bearing of the straight-tooth bar 1021, there are two the bearing 1022 is set It is vertically fixed on the left and right sides of bracket 1023, the input belt wheel 1024 sets that there are two be uniformly fixed on 1025 inner wall of belt The axle center of upper and lower two sides, the input belt wheel 1024 is mounted in the groove of 1026 two sides of T-type wheel carrier by bolt, the straight-tooth The gear mechanism on 101 right side of the external tooth of bar 1021 and driving motor is connect, and the rotation ratch 103 is by sprocket wheel 1031, line wheel 1032, iron wire 1033, rotation column 1034, bearing bracket stand 1034, input bull stick 1036 form, and the sprocket wheel 1031 is installed in line wheel 1032 Rear end and be in same axle center, the line wheel 1032 by iron wire 1033 and revolve 1034 outer wall of column center clearance cooperate, The input bull stick 1036 extends vertically through the inner wall of rotation 1034 central axis of column, and the top of the input bull stick 1036 is welded on bearing In the groove of 1034 bottom of frame, the speed regulation knob 104 is by knob 1041, fixture nut 1042, spill spin block 1043, auxiliary wheel 1044, ball screw 1045, cushion 1046 form, the external screw thread in 1041 left side of knob and the interior spiral shell of fixture nut 1042 Line clearance fit, the ball screw 1045 are horizontally fixed on right side and the flexible connection of spill spin block 1043, the auxiliary rolling Wheel 1044 is set there are two the two sides up and down for being installed in spill spin block 1043 by screw, and the cushion 1046 is horizontally fixed on The left side of auxiliary wheel 1044, the speed change belt wheel 105 is by fixed ear 1051, torsional spring 1052, lever arm 1053, movable sprocket wheel 1054, chain 1055, variable sprocket wheel 1056, friction plate 1057, adjusting yoke 1058, movable block 1059, regulating arm 10510, branch Support 10511 forms, and the fixed ear 1051 is fixed on the rear end of torsional spring 1052 and in same axle center, the torsional spring 1052 It is fixed on the upper end of lever arm 1053 and flexible connection, the outer wall of the activity sprocket wheel 1054 passes through chain 1055 and variable chains The outer wall clearance fit of wheel 1056, the friction plate 1057, which is set, is installed in up and down the two of variable 1056 front end of sprocket wheel there are two horizontal Side, the outer wall of the adjusting yoke 1058 are bolted on the center of movable block 1059, and the regulating arm 10510 is fixed fixed In the two sides up and down of movable block 1059, support frame as described above 10511 is vertically welded in the upper end of variable sprocket wheel 1056, the gear set 106 by first gear 1061, tree-like bracket 1062, second gear 1063, cone bar 1064, with pedestal 1065, double belt pulley 1066 compositions, the tree-like bracket 1062 of 1061 second gear of first gear 1063, the cone bar 1064 is horizontal to run through same pedestal 1065 main shaft, 1066 level of double belt pulley are welded on the left-hand face of cone bar 1064, the second gear 1063 External tooth and the external tooth of first gear 1061 are intermeshed, and the double belt pulley 1066 is mechanical even by belt and belt wheel 1071 It connects, the fan 107 is made of belt wheel 1071, ball bearing 1072, steel shaft 1073, flabellum 1074, reinforcing prop 1075, the band Wheel 1071 is vertically fixed on right side and the flexible connection of ball bearing 1072, and the steel shaft 1073 is horizontal to run through ball bearing It 1072 center and is interference fitted with the axle center of flabellum 1074, the belt wheel 1071 and the ratch in 106 left side of gear set are mechanical Connection, the reinforcing prop 1075 are bolted on the left side of 1 inner wall of air circulation device.

The detection mainboard inside body 2 is set by key 5 in the present invention, passes through the intuitively display inspection of display 4 The data of the transmission conversion of probing head 6, once dust concentration is higher or temperature rises, starting air circulation device 1 is carried out scattered immediately Hot and indoor air circulation, prevents dust explosion caused by overheat and other conditions, and air circulation device 1 passes through inside The cone pulley 1013 of driving motor 101 is rotated into the transmission of action edge, is connected by driven gear 1014 and output gear 1015 Straight-tooth bar 1021 is connect, input belt wheel 1024 is made to carry out power transmission under the connection of belt 1025, input belt wheel 1024 rotates meeting Make to input the rotation drive iron wire 1033 of bull stick 1036, the frictional force that iron wire 1033 depends on and revolve between the surface of column 1034 is turned It is dynamic, can be adjusted by adjusting the speed knob 104 when power reaches speed change belt wheel 105, speed regulation knob 104 rotate when Waiting ball screw 1045 can keep adjusting yoke 1058 mobile spill spin block 1043 by the frictional force movement of internal whorl, change and adjust The diameter of the opening and closing degree of joint arm 10510 then friction plate 1057 changes, when 1057 diameter of friction plate is greater than movable sprocket wheel Speed is promoted when 1054, and then speed declines when friction plate diameter is less than movable sprocket wheel 1054, can be avoided unexpected wind Power is excessive to cause indoor dust concentration to improve suddenly, and the lever arm 1053 for being fixed on torsional spring 1052 is connect with movable sprocket wheel 1054 The tension for being able to maintain chain 1055 prevents from skidding, and is rotated finally by 106 driving fan 107 of gear set, fan 107 Flabellum 1074 is mounted with that two raising air outputs improve air circulation speed, and improved dust explosion protection atmospheric detection device can In real time dust concentration detect will start once reaching preset value air circulation device carry out forced ventilation avoid endangering Bring loss occurs for danger.

Ball-screw 1045 of the present invention is actuated element most-often used on machine tool and precision machinery, master Want function be convert rotational motion to linear movement, or torque is converted into axial repeated action power, while have both high-precision, Invertibity and efficient feature.Due to the frictional resistance with very little, ball-screw is widely used in various industrial equipments And precision instrument.

Its structure and principle are all that this technology personnel can be learnt by technical manual or be known by routine experiment method, Problems solved by the invention is that dust explosion has very strong damage capability, and the dust in workshop, which reaches certain condition, to explode Loss and the injures and deaths of personnel are brought to producer, the present invention is combined with each other by above-mentioned component, can achieve improved powder The explosion-proof atmospheric detection device of dirt can detect to dust concentration in real time will start air stream once reaching preset value Logical device carries out forced ventilation and the dangerous bring that occurs is avoided to lose.

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (8)

1. a kind of dust explosion protection atmospheric detection device, structure include：Air circulation device (1), body (2), radiator fan (3), Display (4), key (5), detection probe (6), shaft (7), rotary table (8), column (9), reinforcing rod (10), it is characterised in that：

The outer wall vertical of the air circulation device (1) is fixed on the rear end of body (2) outer wall, and the radiator fan (3) passes through spiral shell Nail is fixed on the middle section of body (2) right lateral surface, display (4) level be installed in the upper end of key (5) and with detection The internal element electrical connection of probe (6), the bottom end of the body (2) are vertically fixed in rotary table (8) upper end by shaft (7) The heart, the column (9) sets to be welded and fixed there are three bottom and the both ends of reinforcing rod (10), and the key (5) sets that there are six in horizontal Column are uniformly fixed on the front end of body (2) outer surface；

The air circulation device (1) is equipped with driving motor (101), belt pulley (102), rotation ratch (103), speed regulation knob (104), speed change belt wheel (105), gear set (106), fan (107), gear and belt pulley on the right side of the driving motor (101) (102) gear on the left of is flexibly connected, and the belt pulley (102) is vertically fixed on the bottom of rotation ratch (103) and gap Cooperation, described speed regulation knob (104) level are installed in the top of rotation ratch (103) and connect with speed change belt wheel (105) machinery It connects, the belt wheel on the left of the speed change belt wheel (105) is flexibly connected with the gear at the top of gear set (106), the gear set (106) It is horizontally fixed on the left side of fan (107), the fan (107) is vertically fixed on air circulation device (1) inner wall by bolt Left side.

2. a kind of dust explosion protection atmospheric detection device according to claim 1, it is characterised in that：The driving motor (101) it is made of pedestal (1011), main motor (1012), cone pulley (1013), driven gear (1014), output gear (1015), The top level of the pedestal (1011) is welded on the lower end of main motor (1012) outer wall, the main shaft of the main motor (1012) with Groove interference fit on the left of cone pulley (1013), the external tooth of the cone pulley (1013) pass through driven gear (1014) and output gear (1015) external tooth intermeshing, the external tooth of the output gear (1015) are flexibly connected with the ratch on the left of belt pulley (102).

3. a kind of dust explosion protection atmospheric detection device according to claim 1, it is characterised in that：The belt pulley (102) By straight-tooth bar (1021), bearing (1022), bracket (1023), input belt wheel (1024), belt (1025), T-type wheel carrier (1026) Composition, the horizontal center for running through bearing (1022) rotor of the straight-tooth bar (1021), the bearing (1022) set that there are two vertical It is fixed on the left and right sides of bracket (1023), the input belt wheel (1024), which sets, is fixed on belt (1025) inner wall there are two uniform Two sides up and down, it is described input belt wheel (1024) axle center be mounted on by bolt in the groove of T-type wheel carrier (1026) two sides, institute The external tooth for stating straight-tooth bar (1021) is connect with the gear mechanism on the right side of driving motor (101).

4. a kind of dust explosion protection atmospheric detection device according to claim 1, it is characterised in that：The rotation ratch (103) by sprocket wheel (1031), line wheel (1032), iron wire (1033), rotation column (1034), bearing bracket stand (1034), input bull stick (1036) it forms, the sprocket wheel (1031) is installed in the rear end of line wheel (1032) and in same axle center, the line wheel (1032) cooperated by the center clearance of iron wire (1033) and rotation column (1034) outer wall, the input bull stick (1036) extends vertically through The inner wall of column (1034) central axis is revolved, the top of input bull stick (1036) is welded on the groove of bearing bracket stand (1034) bottom It is interior.

5. a kind of dust explosion protection atmospheric detection device according to claim 1, it is characterised in that：The speed regulation knob (104) by knob (1041), fixture nut (1042), spill spin block (1043), auxiliary wheel (1044), ball screw (1045), Cushion (1046) forms, the internal screw thread clearance fit of external screw thread and fixture nut (1042) on the left of the knob (1041), The ball screw (1045) is horizontally fixed on right side and the flexible connection of spill spin block (1043), the auxiliary wheel (1044) If the cushion (1046) is horizontally fixed on auxiliary there are two the two sides up and down for being installed in spill spin block (1043) by screw Help the left side of idler wheel (1044).

6. a kind of dust explosion protection atmospheric detection device according to claim 1, it is characterised in that：The speed change belt wheel (105) by fixed ear (1051), torsional spring (1052), lever arm (1053), movable sprocket wheel (1054), chain (1055), variable chains Take turns (1056), friction plate (1057), adjusting yoke (1058), movable block (1059), regulating arm (10510), support frame (10511) Composition, the fixed ear (1051) are fixed on the rear end of torsional spring (1052) and in same axle center, and the torsional spring (1052) is solid It is scheduled on the upper end of lever arm (1053) and flexible connection, the outer wall of the activity sprocket wheel (1054) passes through chain (1055) and can Become the outer wall clearance fit of sprocket wheel (1056), the friction plate (1057) sets be installed in variable sprocket wheel (1056) there are two level before The two sides up and down at end, the outer wall of the adjusting yoke (1058) are bolted on the center of movable block (1059), the tune Joint arm (10510) is scheduled on the two sides up and down of movable block (1059), and support frame as described above (10511) is vertically welded in variable sprocket wheel (1056) upper end.

7. a kind of dust explosion protection atmospheric detection device according to claim 1, it is characterised in that：The gear set (106) By first gear (1061), tree-like bracket (1062), second gear (1063), cone bar (1064), same to pedestal (1065), Double-skin Belt wheel (1066) composition, first gear (1061) second gear (1063) the tree-like bracket (1062), the cone bar (1064) Level runs through the main shaft of same pedestal (1065), and double belt pulley (1066) level is welded on the left side table of cone bar (1064) Face, the external tooth of the second gear (1063) and the external tooth of first gear (1061) are intermeshed, the double belt pulley (1066) it is mechanically connected by belt and belt wheel (1071).

8. a kind of dust explosion protection atmospheric detection device according to claim 1, it is characterised in that：The fan (107) by Belt wheel (1071), ball bearing (1072), steel shaft (1073), flabellum (1074), reinforcing prop (1075) composition, the belt wheel (1071) it is vertically fixed on the right side of ball bearing (1072) and flexible connection, the steel shaft (1073) is horizontal to run through ball axis It holds the center of (1072) and is interference fitted with the axle center of flabellum (1074), on the left of the belt wheel (1071) and gear set (106) Ratch mechanical connection, the reinforcing prop (1075) is bolted on the left side of air circulation device (1) inner wall.