CN209558875U - Feeding mechanism is used in a kind of drying of active carbon - Google Patents

Abstract

The utility model discloses a kind of active carbon drying feeding mechanisms, its structure includes body, bracket, stabilizer blade, switch, power supply line, first support base, first driving motor, belt, first rotating roller and the second rotating roller, by the way that preheating device is arranged in body bottom end, enclosure interior is entered through second charging aperture by moist active carbon, it is passed at conveyer belt importing at inclined plate, start microwave generator and generates microwave to the water progress heat in moist active carbon, to accelerate subsequent baking step operation, the beneficial effect of the effective efficiency for improving drying is reached；And conveying device is set between the first support plate top and discharge port lower part, active carbon after drying is flowed out by discharge port, enclosure interior is placed to by feeding notch, starting third driving motor operating drives transmission impeller to be rotated, transmission transport is carried out to active carbon, discharge charging is carried out in transmission outlet, has reached the beneficial effect that can easily carry out operation conveying charging.

Description

Feeding mechanism is used in a kind of drying of active carbon

Technical field

The utility model relates to feeding mechanism technical fields, and in particular to feeding mechanism is used in a kind of drying of active carbon.

Background technique

Active carbon is black powder or bulk, graininess and cellular amorphous carbon, also there is the crystal of arranged regular Carbon is that have very big specific surface area, to inorganic or organic in gas, solution by the resulting amorphous carbon of working process Substance and colloidal solid etc. have good adsorption capacity, drying, refer to that removal solvent retains solid content by some way Technical process, and just carry out drying when active carbon contains water in the middle and remove moisture removal, then carry out following process use, still The prior art is dried inefficient, and it is not convenient enough to carry out conveying feed operation.

Utility model content

(1) technical problems to be solved

In order to overcome the shortage of prior art, it is proposed that a kind of active carbon drying feeding mechanism is dried with solution It is inefficient, and not convenient enough the problem of conveying feed operation is carried out, reach the effective efficiency for improving drying, and can be square Just the effect for carrying out operation conveying charging.

(2) technical solution

The utility model is achieved through the following technical solutions: the utility model proposes a kind of active carbon drying chargers Structure, including body, bracket, stabilizer blade, switch, power supply line, the first support base, the first driving motor, belt, the first rotating roller, Second rotating roller, conveyer belt, shell, air-heater, access tube, first charging aperture, the second driving motor, rotation axis, stirring blade, Ventilation opening, discharge port, baffle and the first support plate, it is characterised in that: further include conveying device and preheating device, the body bottom End face periphery in the middle part of manual metal-arc welding mode and cantilever tip by being welded, and two lead to stabilizer blade top before and after the bracket bottom end It crosses manual metal-arc welding mode to be welded, the body front center is bolted by hex bolts and switch rear end, described Power supply line right end and switch left end carry out grafting, and bracket right end lower part welded with the first support plate left end, and described the One support plate top end face rectangular itself and middle part are welded by plum blossom bolt and conveying device bottom end, the body top It is welded with preheating device bottom end, first support base bottom end is welded with body inner wall bottom end left part, and described One support base top middle portion is bolted with the first driving motor bottom end by hexagon socket countersunk flat cap head screw, and described first drives It is provided with belt between the first rotating roller outer surface front end in the middle part of dynamic motor leading exterior surface, and the first driving motor passes through Belt is rotatablely connected with the first rotating roller, is rotated between first rotating roller rear and front end and body upper end left part It connects, the second rotating roller, first rotating roller outer surface middle part and second is rotatably connected between the left part of the body upper end It is provided with conveyer belt between in the middle part of rotating roller outer surface, and the first rotating roller is rotated by conveyer belt and the second rotating roller Connection, the shell left end by being welded in the middle part of manual metal-arc welding mode and body right end, body inner wall bottom end right part and Air-heater bottom end is bolted by plum blossom bolt, carries out screw thread company with access tube left end in the middle part of the air-heater right end It connecing, the access tube carries out seamless grafting through shell left upper part, and the left portion in body top is provided with first charging aperture, The body top middle portion is bolted by hex bolts and the second driving motor bottom end, the rotation axis top and the Two driving motor center bottoms carry out grafting, and rotation axis left and right ends middle section is welded with stirring blade, the body right end Middle and upper part is provided with ventilation opening, and body right end middle and lower part is welded by manual metal-arc welding mode and discharge port left end, described Slidably connect baffle between body right end middle and lower part and discharge port left end, the conveying device by conveying main body, charging notch, Transmit outlet, the second support plate, third driving motor, transmission impeller and the second support base composition, the conveying main body top Left portion is welded with charging notch bottom end by manual metal-arc welding mode, and the conveying main body right end middle and lower part passes through manual metal-arc welding side Formula is welded with transmission outlet right end, and the conveying main body left end middle and lower part is welded with the second support plate left end, described Third driving motor bottom end is bolted with the second support plate top middle portion by hexagon socket countersunk flat cap head screw, and the third is driven Carry out in the middle part of dynamic motor left end with transmission impeller right end grafting, the second support base top middle portion and conveying main body bottom end into Row welding, the first support plate top end face rectangular itself and middle part pass through plum blossom bolt and the progress of the second support base bottom end Welding, the preheating device are made of shell, second charging aperture, importing inclined plate, fixing seat and microwave generator, and the shell is left End top is provided with second charging aperture, and the importing inclined plate left end is welded by manual metal-arc welding mode and inner walls left upper part It connects, the fixing seat top is welded with inner walls top middle portion, and the fixing seat bottom end is connected by hex bolts bolt Be connected to microwave generator, the body top is welded with housing bottom, the power supply line, the first driving motor, air-heater, Second driving motor, third driving motor and microwave generator pass through switch and are electrically connected, and switch front end face setting There are five buttons to carry out respectively with the first driving motor, air-heater, the second driving motor, third driving motor and microwave generator Electrical connection.

Further, the transmission outlet inside wall and holding plane are oblique, and inclined angle is 30 degree.

Further, the second support base bottom face is parallel to each other with the first support plate top end face, and second It is smooth to support pedestal bottom face.

Further, the conveying main body inner wall smallest cross-sectional is in rounded shape, and it is dry to convey body interior.

Further, the tilt angle imported between inclined plate bottom face and holding plane is 60 degree, and is imported Inclined plate top end face is smooth.

Further, there are six the microwave generator settings, and it is equally distributed on fixing seat bottom face.

Further, the discharge port bottom end is at charging notch inner wall top lower part 4cm, and feeds notch inner wall It is smooth.

Further, the model M24FB-210A of the microwave generator.

Further, the model VT3000 of the air-heater.

Further, 86 motor of model of first driving motor.

(3) beneficial effect

The utility model compared with the existing technology, has the advantages that

1), inefficient to solve the problems, such as to be dried, by the way that preheating device is arranged in body bottom end, by moist Active carbon enters enclosure interior through second charging aperture, is passed at conveyer belt importing at inclined plate, and starting microwave generator produces Raw microwave carries out heat to the water in moist active carbon, to accelerate subsequent baking step operation, has reached effective raising The beneficial effect of the efficiency of drying.

2), not convenient enough to solve the problems, such as to carry out conveying feed operation, by the first support plate top and discharge port Conveying device is set between lower part, and the active carbon after drying is flowed out by discharge port, is placed to conveying master by feeding notch Internal portion, starting third driving motor operating drive transmission impeller to be rotated, carry out transmission transport to active carbon, sending out Mouth carries out discharge charging, has reached the beneficial effect that can easily carry out operation conveying charging.

Detailed description of the invention

Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model Sign, objects and advantages will become more apparent upon:

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the schematic diagram of internal structure of the utility model；

Fig. 3 is the conveying device structural schematic diagram of the utility model；

Fig. 4 is the preheating device structural schematic diagram of the utility model；

In figure: body -1, bracket -2, stabilizer blade -3, switch -4, power supply line -5, conveying device -6, preheating device -7, first Support base -8, the first driving motor -9, belt -10, the first rotating roller -11, the second rotating roller -12, conveyer belt -13, shell - 14, air-heater -15, access tube -16, first charging aperture -17, the second driving motor -18, rotation axis -19, stirring blade -20, logical Air port -21, discharge port -22, baffle -23, the first support plate -24, conveying main body -61, charging notch -62, transmission outlet -63, Second support plate -64, third driving motor -65, transmission impeller -66, the second support base -67, shell -71, second charging aperture - 72, inclined plate -73, fixing seat -74, microwave generator -75 are imported.

Specific embodiment

In the technical program:

Conveying device 6, preheating device 7, conveying main body 61, charging notch 62, transmission outlet 63, third support plate 64, the Three driving motors 65, the second support base 67, shell 71, second charging aperture 72, import inclined plate 73, fixing seat at transmission impeller 66 74 and microwave generator 75 be that the utility model contains the innovative component of essence.

Body 1, bracket 2, stabilizer blade 3, switch 4, power supply line 5, the first support base 8, the first driving motor 9, belt 10, One rotating roller 11, the second rotating roller 12, conveyer belt 13, shell 14, air-heater 15, access tube 16, first charging aperture 17, second are driven Dynamic motor 18, rotation axis 19, stirring blade 20, ventilation opening 21, discharge port 22, baffle 23 and the first support plate 24 are to realize this reality With the essential connectivity component of new technique scheme.

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

Fig. 1, Fig. 2, Fig. 3 and Fig. 4 are please referred to, the utility model provides a kind of active carbon drying feeding mechanism: including machine Body 1, bracket 2, stabilizer blade 3, switch 4, power supply line 5, the first support base 8, the first driving motor 9, belt 10, the first rotating roller 11, the second rotating roller 12, conveyer belt 13, shell 14, air-heater 15, access tube 16, first charging aperture 17, the second driving motor 18, rotation axis 19, stirring blade 20, ventilation opening 21, discharge port 22, baffle 23, the first support plate 24, conveying device 6 and preheating Device 7,1 bottom face periphery of body are welded by manual metal-arc welding mode and 2 top middle portion of bracket, two before and after 2 bottom end of bracket It is welded with 3 top of stabilizer blade by manual metal-arc welding mode, 1 front center of body carries out spiral shell by hex bolts and 4 rear end of switch It tethers and connects, 5 right end of power supply line and 4 left end of switch carry out grafting, and 2 right end lower part of bracket is welded with 24 left end of the first support plate It connects, 24 top end face of the first support plate rectangular itself and middle part are welded by plum blossom bolt and 6 bottom end of conveying device, body 1 top is welded with 7 bottom end of preheating device, and 8 bottom end of the first support base is welded with 1 inner wall bottom end left part of body, the One support base, 8 top middle portion is bolted with 9 bottom end of the first driving motor by hexagon socket countersunk flat cap head screw, the first driving Belt 10, and the first driving motor 9 are provided between 11 outer surface front end of the first rotating roller in the middle part of 9 leading exterior surface of motor It is rotatablely connected by belt 10 and the first rotating roller 11, between 1 upper end left part of 11 rear and front end of the first rotating roller and body Be rotatablely connected, be rotatably connected to the second rotating roller 12 between 1 upper end left part of body, in the middle part of 11 outer surface of the first rotating roller with Conveyer belt 13 is provided between in the middle part of second rotating roller, 12 outer surface, and the first rotating roller 11 passes through conveyer belt 13 and second turn Dynamic roller 12 is rotatablely connected, and 14 left end of shell in the middle part of manual metal-arc welding mode and 1 right end of body by being welded, 1 inner wall of body Bottom end right part is bolted with 15 bottom end of air-heater by plum blossom bolt, in the middle part of 15 right end of air-heater and 16 left end of access tube It is threadedly coupled, access tube 16 carries out seamless grafting through 14 left upper part of shell, and the left portion in 1 top of body is provided with first Feed inlet 17,1 top middle portion of body are bolted by hex bolts and 18 bottom end of the second driving motor, and rotation axis 19 is pushed up End carries out grafting with 18 center bottom of the second driving motor, and 19 left and right ends middle section of rotation axis is welded with stirring blade 20, body 1 Right end middle and upper part is provided with ventilation opening 21, and 1 right end middle and lower part of body is welded by manual metal-arc welding mode and 22 left end of discharge port, Baffle 23 is slidably connected between 1 right end middle and lower part of body and 22 left end of discharge port, conveying device 6 is by conveying main body 61, charging Notch 62, the 63, second support plate 64 of transmission outlet, third driving motor 65, transmission impeller 66 and the second support base 67 composition, The conveying left portion in 61 top of main body is welded with charging 62 bottom end of notch by manual metal-arc welding mode, under conveying in 61 right end of main body Portion is welded by manual metal-arc welding mode and 63 right ends of transmission outlet, and conveying 61 left end middle and lower part of main body and the second support plate 64 are left End is welded, and 65 bottom end of third driving motor carries out bolt by hexagon socket countersunk flat cap head screw with 64 top middle portion of the second support plate Connection, carries out grafting in the middle part of 65 left end of third driving motor with transmission 66 right end of impeller, 67 top middle portion of the second support base with Conveying 61 bottom end of main body is welded, and 24 top end face of the first support plate rectangular itself and middle part pass through plum blossom bolt and second Support 67 bottom end of pedestal is welded, and preheating device 7 is by shell 71, second charging aperture 72, importing inclined plate 73, fixing seat 74 and microwave Generator 75 forms, and second charging aperture 72 is provided at the top of 71 left end of shell, import 73 left end of inclined plate by manual metal-arc welding mode with 71 inner wall left upper part of shell is welded, and 74 top of fixing seat is welded with 71 inner wall top middle portion of shell, fixing seat 74 Bottom end has been bolted microwave generator 75 by hex bolts, and 1 top of body is welded with 71 bottom end of shell, power supply line 5, First driving motor 9, air-heater 15, the second driving motor 18, third driving motor 65 and microwave generator 75 pass through switch 4 It is electrically connected, and there are five buttons to drive respectively with the first driving motor 9, air-heater 15, second for the setting of 4 front end face of switch Motor 18, third driving motor 65 and microwave generator 75 are electrically connected.

Wherein, the transmission exports 63 inner walls and holding plane is oblique, and inclined angle is 30 degree, is reduced Stop, facilitates and discharge.

Wherein, 67 bottom face of the second support base is parallel to each other with 24 top end face of the first support plate, and second It is smooth to support 67 bottom face of pedestal, increases contact area, improves firm effect.

Wherein, the 61 inner wall smallest cross-sectional of conveying main body is in rounded shape, and it is internally dry to convey main body 61, prevents from gluing It connects in conveying 61 inner wall of main body, and accelerates discharge velocity.

Wherein, the tilt angle imported between 73 bottom face of inclined plate and holding plane is 60 degree, and is imported oblique 73 top end face of plate is smooth, reduces resistance, falls into stabilization.

Wherein, there are six the settings of microwave generator 75, and it is equally distributed on 74 bottom face of fixing seat, issues micro- Wave has, and the rate of heat addition is stablized.

Wherein, 22 bottom end of discharge port is at charging 62 inner wall top lower part 4cm of notch, and feeds in notch 62 Wall is smooth, prevents from dropping out when charging, causes to lose economic benefit.

Wherein, the model M24FB-210A of the microwave generator 75, safety and stability are durable.

Wherein, the model VT3000 of the air-heater 15, wind-force is big, heat foot.

Wherein, 86 motor of model of first driving motor 9, power stability, long service life.

Air-heater 15 described in this patent is the preferred product of modern industry heat source upgrading, and electromechanical equipment is hot wind The optimal hot air source configuration of the automated machines such as furnace conveyor, drying oven, baking oven, sealing machine；First driving motor 9 is Refer to a kind of calutron that electric energy conversion or transmitting are realized according to the law of electromagnetic induction.

Working principle: it firstly, the active carbon drying is moved to suitable position with feeding mechanism, is carried out by stabilizer blade 3 It places and consolidates, then, when carrying out active carbon drying, i.e., external power supply is connected by power supply line 5, by setting in 1 bottom end of body Preheating device 7 is set, is entered inside shell 71 by moist active carbon through second charging aperture 72, is passed into importing at inclined plate 73 At conveyer belt 13, then, the button of 4 front end of switch setting is clicked, the first driving motor 9 of starting is operated, so that first drives Dynamic 9 front end output shaft of motor is rotated, and 9 front end output shaft of the first driving motor and 11 leading exterior surface of the first rotating roller it Between be provided with belt 10, by 9 front end output shaft of the first driving motor carry out rotation by belt 10 drive the first rotating roller 11 It is rotated, and is provided with conveyer belt 13 between the first rotating roller 11 and 12 outer surface of the second rotating roller middle part, and then by first The rotation of rotating roller 11 drives the second rotating roller 12 to be rotated under the effect of conveyer belt 13, meanwhile, so that 13 top of conveyer belt Active carbon moved, at this point, starting microwave generator 75 generate microwave in moist active carbon water carry out heat, from And accelerate subsequent baking step operation, reach the beneficial effect of the effective efficiency for improving drying, later, the moist work of preheating Property charcoal be passed into shell 14 by first charging aperture 17, starting air-heater 15 is operated and is generated hot wind, by being passed through The hot wind that air-heater 15 generates is passed through in shell 14 by pipe 16, is dried to the moist active carbon in shell 14, hot gas Discharge circulation is carried out via ventilation opening 21, meanwhile, the second driving motor 18 of starting is operated, so that 18 bottom of the second driving motor The output shaft at end is rotated, so that the rotation axis 19 of 18 bottom end of the second driving motor setting be driven to be rotated, and is driven The stirring blade 20 of 19 left and right ends of rotation axis setting is rotated, and is stirred the moist active carbon in 14 inside of shell It mixes, accelerates Drying Rates, finally, after the completion of drying, i.e., by being set between 22 lower part of 24 top of the first support plate and discharge port Conveying device 6 is set, the active carbon after drying is flowed out by discharge port 22, is placed in conveying main body 61 by feeding notch 62 Portion, the starting operating of third driving motor 65 drive transmission impeller 66 to be rotated, carry out transmission transport to active carbon, sending out Mouth 63 carries out discharge charging, has reached the beneficial effect that can easily carry out operation conveying charging.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, for For those skilled in the art, it is clear that the present invention is not limited to the details of the above exemplary embodiments, and without departing substantially from this In the case where the spirit or essential attributes of utility model, the utility model can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by institute Attached claim rather than above description limit, it is intended that will fall within the meaning and scope of the equivalent elements of the claims All changes are embraced therein.It should not treat any reference in the claims as limiting related right It is required that.

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 (7)

1. a kind of active carbon drying feeding mechanism, including body (1), bracket (2), stabilizer blade (3), switch (4), power supply line (5), First support base (8), the first driving motor (9), belt (10), the first rotating roller (11), the second rotating roller (12), conveyer belt (13), shell (14), air-heater (15), access tube (16), first charging aperture (17), the second driving motor (18), rotation axis (19), stirring blade (20), ventilation opening (21), discharge port (22), baffle (23) and the first support plate (24), it is characterised in that: It further include conveying device (6) and preheating device (7), body (1) the bottom face periphery is pushed up by manual metal-arc welding mode and bracket (2) End middle part is welded, and two are welded with stabilizer blade (3) top by manual metal-arc welding mode before and after bracket (2) bottom end, institute State body (1) front center by hex bolts and switch (4) rear end be bolted, power supply line (5) right end with open It closes (4) left end and carries out grafting, bracket (2) the right end lower part is welded with the first support plate (24) left end, and described first Fagging (24) top end face rectangular itself and middle part are welded by plum blossom bolt and conveying device (6) bottom end, the body (1) top is welded with preheating device (7) bottom end, the first support base (8) bottom end and body (1) inner wall bottom end left part Welded, the first support base (8) top middle portion and the first driving motor (9) bottom end by hexagon socket countersunk flat cap head screw into Row is bolted, and is set between the first rotating roller (11) outer surface front end in the middle part of the first driving motor (9) leading exterior surface It is equipped with belt (10), and the first driving motor (9) is rotatablely connected by belt (10) with the first rotating roller (11), it is described Be rotatablely connected between first rotating roller (11) rear and front end and body (1) upper end left part, body (1) upper end left part it Between be rotatably connected to the second rotating roller (12), in the middle part of the first rotating roller (11) outer surface with the second rotating roller (12) outer surface It is provided between middle part conveyer belt (13), and the first rotating roller (11) is carried out by conveyer belt (13) and the second rotating roller (12) Rotation connection, shell (14) left end in the middle part of manual metal-arc welding mode and body (1) right end by being welded, the body (1) Inner wall bottom end right part is bolted with air-heater (15) bottom end by plum blossom bolt, in the middle part of air-heater (15) right end with Access tube (16) left end is threadedly coupled, and the access tube (16) carries out seamless grafting, institute through shell (14) left upper part It states body (1) left portion in top to be provided with first charging aperture (17), body (1) top middle portion passes through hex bolts and second Driving motor (18) bottom end is bolted, and rotation axis (19) top and the second driving motor (18) center bottom carry out Grafting, rotation axis (19) the left and right ends middle section are welded with stirring blade (20), and body (1) the right end middle and upper part is provided with Ventilation opening (21), body (1) the right end middle and lower part are welded by manual metal-arc welding mode and discharge port (22) left end, the machine It is slidably connected baffle (23) between body (1) right end middle and lower part and discharge port (22) left end, the conveying device (6) is led by conveying Body (61), charging notch (62), transmission outlet (63), the second support plate (64), third driving motor (65), transmission impeller (66) It is formed with the second support base (67), the left portion in conveying main body (61) top and charging notch (62) bottom end pass through manual metal-arc welding Mode is welded, and conveying main body (61) the right end middle and lower part is welded by manual metal-arc welding mode and transmission outlet (63) right end It connects, conveying main body (61) the left end middle and lower part is welded with the second support plate (64) left end, the third driving motor (65) bottom end is bolted with the second support plate (64) top middle portion by hexagon socket countersunk flat cap head screw, the third driving electricity Grafting is carried out in the middle part of machine (65) left end with transmission impeller (66) right end, the second support base (67) top middle portion and conveying are led Body (61) bottom end is welded, and the first support plate (24) top end face rectangular itself and middle part pass through plum blossom bolt and second Support base (67) bottom end is welded, and the preheating device (7) is by shell (71), second charging aperture (72), importing inclined plate (73), fixing seat (74) and microwave generator (75) composition, shell (71) the left end top are provided with second charging aperture (72), The importing inclined plate (73) left end is welded by manual metal-arc welding mode and shell (71) inner wall left upper part, the fixing seat (74) top is welded with shell (71) inner wall top middle portion, and fixing seat (74) bottom end is bolted by hex bolts Have microwave generator (75), body (1) top is welded with shell (71) bottom end, the power supply line (5), the first driving Motor (9), air-heater (15), the second driving motor (18), third driving motor (65) and microwave generator (75) are by opening Close (4) be electrically connected, and switch (4) front end face setting there are five button respectively with the first driving motor (9), air-heater (15), the second driving motor (18), third driving motor (65) and microwave generator (75) are electrically connected.

2. a kind of active carbon drying feeding mechanism according to claim 1, it is characterised in that: the transmission exports (63) Inner wall is oblique with holding plane, and inclined angle is 30 degree.

3. a kind of active carbon drying feeding mechanism according to claim 1, it is characterised in that: second support base (67) bottom face is parallel to each other with the first support plate (24) top end face, and the second support base (67) bottom face is smooth.

4. a kind of active carbon drying feeding mechanism according to claim 1, it is characterised in that: the conveying main body (61) Inner wall smallest cross-sectional is in rounded shape, and it is internally dry to convey main body (61).

5. a kind of active carbon drying feeding mechanism according to claim 1, it is characterised in that: the importing inclined plate (73) Tilt angle between bottom face and holding plane is 60 degree, and it is smooth to import inclined plate (73) top end face.

6. a kind of active carbon drying feeding mechanism according to claim 1, it is characterised in that: the microwave generator (75) there are six setting, and it is equally distributed on fixing seat (74) bottom face.

7. a kind of active carbon drying feeding mechanism according to claim 1, it is characterised in that: discharge port (22) bottom End feeds notch (62) inner wall smooth at charging notch (62) inner wall top lower part 4cm.