CN220553368U - Winding device for producing film capacitor - Google Patents

Abstract

The utility model discloses a winding device for producing a film capacitor, which relates to the field of film capacitor production technology and comprises a supporting plate, wherein the supporting plate is provided with a winding roller and a driving piece for driving the winding roller to rotate, the winding roller is detachably connected with the driving piece, the supporting plate is fixedly connected with a horizontal cylinder, an output shaft of the horizontal cylinder is fixedly connected with a push plate, the lower end part of the push plate is fixedly connected with a horizontal plate, the supporting plate is provided with two mutually parallel strip-shaped grooves, the supporting plate is slidably connected with two turntables, the two turntables are respectively positioned in the two strip-shaped grooves, the turntables are provided with mounting grooves matched with the winding roller, the turntables are provided with locking pieces for fixing the winding roller, and the supporting plate is provided with a pushing piece for pushing the two turntables to synchronously rotate. The application has the effect of being convenient for unload to the winding roller after winding.

Description

Winding device for producing film capacitor

Technical Field

The utility model relates to the field of film capacitor production technology, in particular to a winding device for producing a film capacitor.

Background

Film capacitors are capacitors having a cylindrical structure in which electrodes are formed by using metal foil as electrodes and by overlapping the electrodes with a plastic film such as polyethylene, polypropylene, polystyrene or polycarbonate, and then winding the film capacitors from both ends, and are often used in analog circuits because of their small dielectric loss.

The film capacitor needs to be wound into a roll in the production process, the plastic film is generally wound on the outer side of the winding roller by using the winding device, after the winding is completed, the winding roller and the plastic film need to be discharged from the winding device, the discharging work is generally completed by manpower, the winding roller after winding is generally heavy, and the labor is wasted when the discharging is performed by manpower.

Disclosure of Invention

In order to facilitate the unloading of the wound roll after winding, the application provides a winding device for producing a film capacitor.

The application provides a winding device for producing a film capacitor, which adopts the following technical scheme:

the utility model provides a production film capacitor's winding device, includes the backup pad, the backup pad is equipped with around the roller and is used for the drive around roller pivoted driving piece, around roller and driving piece detachable connection, backup pad fixedly connected with horizontal cylinder, horizontal cylinder output shaft fixedly connected with push pedal, tip fixedly connected with horizontal plate under the push pedal, two bar grooves that are parallel to each other have been seted up to the backup pad, backup pad sliding connection has two turntables, two turntables are located two bar grooves respectively, the installation groove with around roller looks adaptation has been seted up to the turnplate, the turnplate is equipped with the retaining member that is used for fixed around the roller, the backup pad is equipped with and is used for promoting two turnplate synchronous pivoted pushers.

Through adopting above-mentioned technical scheme, the driving piece drives around the roller and rotates for plastic film twines in around the roller outside, after plastic film is around the reel completion, horizontal cylinder work, drive push pedal and horizontal plate remove, make the horizontal plate be located around the roller below, around roller and driving piece separation back fall in horizontal plate up end, the horizontal plate drives around the roller and continues to remove, will insert respectively around the both ends of roller in corresponding mounting groove, the retaining member will be connected fixedly around roller and carousel, the impeller drives two carousels and moves around the roller along bar groove length direction, and then realize around the unloading process of roller, staff's work load has been reduced.

Optionally, the impeller includes promotion screw rod, diaphragm and two risers, promotes the screw rod rotation and connects inside the backup pad, promotes the screw rod and wears to establish the diaphragm and with diaphragm threaded connection, diaphragm sliding connection is inside the backup pad, two risers respectively fixed connection in the both ends of diaphragm, the spout that is linked together with the bar groove with riser looks adaptation is seted up to the backup pad, spout and bar groove setting are worn to establish at the upper end of riser.

Through adopting above-mentioned technical scheme, promote the screw rod and rotate, the backup pad is spacing to the diaphragm for the diaphragm removes along promotion screw rod length direction, and two risers together remove along with the diaphragm, and the upper end of two risers is inconsistent with the carousel, when the riser removes along the spout, can promote the carousel and remove along the bar groove, makes the carousel remove along bar groove length direction.

Optionally, the retaining member includes two-way lead screw and two movable plates, and two ends of two-way lead screw are rotated with two turntables respectively and are connected, and two movable plates and with movable plate threaded connection are worn to establish respectively at two ends of two-way lead screw, and two movable plates are all fixedly connected with retaining block, and the retaining block sets up between two movable plates, and the equal fixedly connected with gag lever post of turntables, gag lever post wear to establish corresponding movable plate and with movable plate sliding connection.

Through adopting above-mentioned technical scheme, when two-way lead screw rotates, the gag lever post is spacing to the movable plate for two movable plates are close to each other or keep away from each other along two-way lead screw length direction, and then drive two latch segment and keep away from each other or be close to each other, in the latch segment can insert corresponding mounting groove, when making the carousel remove along the bar groove, around the winding roller be difficult for carrying out the separation with the mounting groove.

Optionally, the driving piece includes driving motor and connecting rod, backup pad fixedly connected with riser, driving motor and riser fixed connection, and driving motor output shaft wears to set up board and connecting rod fixed connection, and the jack with winding roller looks adaptation is seted up to the connecting rod, winds the spacing of roller fixedly connected with, and the spacing groove that spacing looks adaptation and is linked together with the jack is seted up to the connecting rod, backup pad sliding connection has the slide, the through-hole with winding roller looks adaptation has been seted up to the slide.

Through adopting above-mentioned technical scheme, insert in the jack around the one end of roller for when driving motor output shaft drives the connecting rod pivoted, can drive around the roller and rotate, in the other end of winding the roller inserts the through-hole, the slide provides the support for the other end of winding the roller, makes around the roller to keep the horizontality.

Optionally, slide fixedly connected with separation cylinder, separation cylinder output fixedly connected with connecting plate, connecting plate fixedly connected with wind the pneumatic clamping jaw of roller looks adaptation.

Through adopting above-mentioned technical scheme, pneumatic clamping jaw is to winding the roller centre gripping, and separation cylinder work can drive winding the roller and remove along self circumference direction, is convenient for will wind the roller and separate with the connecting rod.

Optionally, the pneumatic clamping jaw fixedly connected with sand grip, around the roll up the roller seted up with sand grip looks adaptation recess.

Through adopting above-mentioned technical scheme, when pneumatic clamping jaw carries out the centre gripping to winding roller, the sand grip gets into in the recess, and the recess is spacing to the sand grip, is favorable to improving pneumatic clamping jaw and winding roller between connection stability for pneumatic clamping jaw is difficult for taking place relative slip with winding roller.

Optionally, backup pad fixedly connected with mobile motor, mobile motor output shaft fixedly connected with remove the screw rod, slide lower extreme fixedly connected with slider, remove the screw rod and wear to establish the slider and with slider threaded connection, the backup pad has seted up the removal groove with slider looks adaptation.

Through adopting above-mentioned technical scheme, mobile motor drives and removes the screw rod and rotate, and the mobile groove is spacing to the slider for the slider removes along removing screw rod length direction, and then drives the slide and remove, and the slide mutually supports with the separation cylinder, can be with winding roller and driving piece separation, and can be with winding roller and slide separation, and need not the manual separation of carrying out of staff.

Optionally, the horizontal plate is fixedly connected with baffles along both ends of the length direction.

Through adopting above-mentioned technical scheme, the baffle can be spacing to plastic film, is favorable to improving plastic film and winding roller and is located the stability of horizontal plate.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the driving piece drives the winding roller to rotate, so that the plastic film is wound on the outer side of the winding roller, after the plastic film is wound, the horizontal cylinder works to drive the push plate and the horizontal plate to move, so that the horizontal plate is positioned below the winding roller, the winding roller is separated from the driving piece and then falls on the upper end face of the horizontal plate, the horizontal plate drives the winding roller to move continuously, two ends of the winding roller are respectively inserted into corresponding mounting grooves, the locking piece is used for connecting and fixing the winding roller and the turntable, the pushing piece drives the two turntables and the winding roller to move along the length direction of the strip-shaped groove, the unloading process of the winding roller is further realized, and the workload of workers is reduced;

2. the pushing screw rod rotates, the supporting plate limits the transverse plate, the transverse plate moves along the length direction of the pushing screw rod, the two vertical plates move along with the transverse plate, the upper ends of the two vertical plates are in contact with the rotating disc, and when the vertical plates move along the sliding groove, the rotating disc can be pushed to move along the strip-shaped groove, so that the rotating disc moves along the length direction of the strip-shaped groove;

3. when the bidirectional screw rotates, the limiting rod limits the movable plates, so that the two movable plates are mutually close to or far away from each other along the length direction of the bidirectional screw, and further the two locking blocks are driven to be mutually far away from or mutually close to each other, and the locking blocks can be inserted into the corresponding mounting grooves, so that the winding roller is not easy to separate from the mounting grooves when the turntable moves along the strip-shaped grooves.

Drawings

Fig. 1 is a schematic view of the overall structure of a winding device for producing a film capacitor.

Fig. 2 is an exploded view of a part of a winding device for producing a film capacitor.

Reference numerals illustrate: 1. a support plate; 11. a bar-shaped groove; 12. a pushing member; 121. pushing the screw; 122. a cross plate; 123. a riser; 124. a chute; 13. a slide plate; 131. a through hole; 132. separating the air cylinder; 133. a connecting plate; 134. pneumatic clamping jaws; 135. a convex strip; 136. a groove; 14. a moving motor; 141. moving the screw; 142. a slide block; 143. a moving groove; 2. winding a roller; 3. a driving member; 31. a driving motor; 32. a connecting rod; 33. a vertical plate; 34. a jack; 35. a limit bar; 36. a limit groove; 4. a horizontal cylinder; 41. a push plate; 42. a horizontal plate; 421. a baffle; 5. a turntable; 51. a mounting groove; 52. a locking member; 521. a bidirectional screw rod; 522. a moving plate; 523. a locking block; 524. and a limit rod.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a winding device for producing a film capacitor.

Examples

Referring to fig. 1 and 2, a winding device for producing a film capacitor comprises a supporting plate 1, wherein the supporting plate 1 is provided with a winding roller 2 and a driving piece 3 for driving the winding roller 2 to rotate, the driving piece 3 can drive the winding roller 2 to rotate, one end of a plastic film is connected with the winding roller 2, and the plastic film can be wound on the outer side of the winding roller 2 by rotating the winding roller 2. The winding roller 2 is detachably connected with the driving piece 3, and after the winding process is finished, the winding roller 2 and the driving piece 3 can be separated, and a new winding roller 2 is installed to continue winding.

Referring to fig. 1 and 2, the driving member 3 includes a driving motor 31 and a connecting rod 32, the supporting plate 1 is fixedly connected with a vertical plate 33, the driving motor 31 is fixedly connected with the vertical plate 33, an output shaft of the driving motor 31 penetrates through the vertical plate 33 and is fixedly connected with the connecting rod 32, the driving motor 31 can drive the connecting rod 32 to rotate, a jack 34 matched with the winding roller 2 is formed in the connecting rod 32, a limit bar 35 is fixedly connected with the winding roller 2, a limit groove 36 matched with the limit bar 35 and communicated with the jack 34 is formed in the connecting rod 32, when the winding roller 2 is inserted into the jack 34, the limit bar 35 is inserted into the corresponding limit groove 36, and the limit groove 36 limits the limit bar 35, so that when the connecting rod 32 rotates, the winding roller 2 rotates along with the connecting rod 32.

Referring to fig. 1 and 2, the support plate 1 is slidably connected with a sliding plate 13, the sliding plate 13 is provided with a through hole 131 adapted to the winding roller 2, the sliding plate 13 is arranged opposite to the vertical plate 33, the sliding plate 13 and the vertical plate 33 are respectively positioned at two ends of the winding roller 2, when one end of the winding roller 2 is connected with the connecting rod 32, the sliding plate 13 is used for inserting the other end of the winding roller 2 into the through hole 131, and the sliding plate 13 provides support for the other end of the winding roller 2, so that the winding roller 2 maintains a horizontal state when rotating.

Referring to fig. 1 and 2, a support plate 1 is fixedly connected with a moving motor 14, an output shaft of the moving motor 14 is fixedly connected with a moving screw 141, the moving motor 14 can drive the moving screw 141 to rotate, a sliding block 142 is fixedly connected with the lower end portion of a sliding plate 13, a moving groove 143 matched with the sliding block 142 is formed in the support plate 1, the sliding block 142 is located in the moving groove 143 to move, the moving screw 141 penetrates through the sliding block 142 and is in threaded connection with the sliding block 142, when the moving screw 141 rotates, the moving groove 143 limits the sliding block 142, so that the sliding block 142 moves along the length direction of the moving screw 141, and the sliding plate 13 is driven to move along the length direction of the moving screw 141.

Referring to fig. 1 and 2, a support plate 1 is fixedly connected with a horizontal cylinder 4, an output shaft of the horizontal cylinder 4 is fixedly connected with a push plate 41, a lower end part of the push plate 41 is fixedly connected with a horizontal plate 42, and when the winding process of the winding roller 2 is finished, the horizontal cylinder 4 works to drive the push plate 41 and the horizontal plate 42 to move, so that the horizontal plate 42 is positioned below the winding roller 2. The slide 13 fixedly connected with separation cylinder 132, separation cylinder 132 output fixedly connected with connecting plate 133, connecting plate 133 fixedly connected with wind the pneumatic clamping jaw 134 of roller 2 looks adaptation, pneumatic clamping jaw 134 work for pneumatic clamping jaw 134 tightens up and presss from both sides tightly around roller 2, separation cylinder 132 shrink drive pneumatic clamping jaw 134 to keeping away from driving motor 31's one end and remove, make around roller 2 and connecting rod 32 separation, and around roller 2 one end that is close to connecting rod 32 falls on the up end of horizontal plate 42.

Referring to fig. 1 and 2, the moving motor 14 operates to drive the sliding plate 13 to move in a direction away from the vertical plate 33, and simultaneously the separating cylinder 132 extends, and the distance that the sliding plate 13 moves is the same as the distance that the output end of the separating cylinder 132 extends, so that the pneumatic clamping jaw 134 remains stationary relative to the support plate 1, and simultaneously one end of the winding roller 2 clamped by the pneumatic clamping jaw 134 also remains stationary, the winding roller 2 is pulled out of the through hole 131, so that the winding roller 2 is separated from the sliding plate 13, the pneumatic clamping jaw 134 releases the winding roller 2, and one end of the winding roller 2 away from the connecting rod 32 falls, so that the winding roller 2 and the plastic film fall on the upper end surface of the horizontal plate 42. The horizontal plate 42 is fixedly connected with the baffle 421 along the two ends of the length direction, the plastic film is positioned between the two baffles 421, and the baffles 421 can limit the plastic film, so that the stability of the plastic film and the winding roller 2 positioned on the horizontal plate 42 is improved.

Referring to fig. 1 and 2, pneumatic clamping jaw 134 fixedly connected with sand grip 135, around roller 2 offer with sand grip 135 looks adaptation recess 136, when pneumatic clamping jaw 134 tightens up to carry out the centre gripping around roller 2, sand grip 135 gets into in the recess 136, recess 136 carries out along around roller 2 axial spacing to sand grip 135 for when pneumatic clamping jaw 134 drives around roller 2 and moves along self axial direction, pneumatic clamping jaw 134 is difficult for skidding and takes place relative slip around roller 2, is favorable to improving the stability when pneumatic clamping jaw 134 is to around roller 2 centre gripping.

Referring to fig. 1 and 2, the support plate 1 is provided with two parallel bar grooves 11, the support plate 1 is slidably connected with two turntables 5, the two turntables 5 are respectively located in the two bar grooves 11, the turntables 5 can rotate or slide along the corresponding bar grooves 11, and the turntables 5 are provided with mounting grooves 51 adapted to the winding roller 2. In the initial state, the opening direction of the mounting groove 51 faces one side of the horizontal cylinder 4, the horizontal cylinder 4 continues to work to drive the horizontal plate 42 and the push plate 41 to move, and simultaneously drives the winding roller 2 and the plastic film above the horizontal plate 42 to move, and two ends of the winding roller 2 are respectively inserted into the corresponding mounting grooves 51.

Referring to fig. 1 and 2, both ends of the winding roller 2 are inserted into the mounting grooves 51 so that the winding roller 2 is fixedly connected with the two turntables 5, at this time, the axis of the winding roller 2 and the axes of the two turntables 5 coincide with each other, the turntables 5 are provided with locking members 52 for fixing the winding roller 2, and the locking members 52 fixedly connect the winding roller 2 with the turntables 5 so that the winding roller 2 and the turntables 5 maintain a coaxial state.

Referring to fig. 1 and 2, the locking member 52 includes a bi-directional screw 521 and two moving plates 522, two ends of the bi-directional screw 521 are respectively rotatably connected with the two turntables 5, the bi-directional screw 521 connects the two turntables 5, so that the two turntables 5 are always parallel to each other and synchronously rotate, the turntables 5 are fixedly connected with a limiting rod 524, the limiting rod 524 penetrates through the corresponding moving plate 522 and is slidably connected with the moving plate 522, and the moving plate 522 can slide along the length direction of the limiting rod 524. Two movable plates 522 are respectively arranged at two ends of the bidirectional screw 521 in a penetrating manner and are in threaded connection with the movable plates 522, and when the bidirectional screw 521 rotates, the movable plates 522 are limited by the limiting rods 524, so that the two movable plates 522 are close to or far from each other along the length direction of the bidirectional screw 521.

Referring to fig. 1 and 2, two movable plates 522 are fixedly connected with locking blocks 523, the locking blocks 523 are arranged between the two movable plates 522, the two locking blocks 523 move together with the two movable plates 522, when the two locking blocks 523 are close to each other, the locking blocks 523 are respectively inserted into corresponding mounting grooves 51, one end of the locking block 523 close to the circle center of the turntable 5 is matched with the winding roller 2, the locking blocks 523 limit the winding roller 2, and when the turntable 5 slides or rotates, the winding roller 2 is not easy to separate from the turntable 5 through the mounting grooves 51, so that when the turntable 5 moves, the winding roller 2 can be driven to move together.

Referring to fig. 1 and 2, the support plate 1 is provided with a pushing member 12 for pushing the two turntables 5 to rotate synchronously, the pushing member 12 drives the turntables 5 to move along the length direction of the strip-shaped grooves 11, and meanwhile, the turntables 5 drive the winding roller 2 to move, so that the winding roller 2 moves along the length direction of the strip-shaped grooves 11, the strip-shaped grooves 11 can be connected with other guide rails, the winding roller 2 is conveyed to other equipment for processing, manual carrying work is omitted, and workload of workers is reduced.

Referring to fig. 1 and 2, the pushing member 12 includes a pushing screw 121, a transverse plate 122 and two vertical plates 123, the pushing screw 121 is rotatably connected inside the supporting plate 1, the pushing screw 121 penetrates through the transverse plate 122 and is in threaded connection with the transverse plate 122, the transverse plate 122 is slidably connected inside the supporting plate 1, the supporting plate 1 limits the transverse plate 122, and when the pushing screw 121 rotates, the transverse plate 122 moves along the length direction of the pushing screw 121. Two risers 123 are respectively fixed connection in the both ends of diaphragm 122, and spout 124 that is linked together with bar groove 11 with riser 123 looks adaptation is seted up to backup pad 1, and spout 124 and bar groove 11 setting are worn to establish by the upper end of riser 123, and two risers 123 move along with diaphragm 122 together, and the upper end of riser 123 is inconsistent with corresponding carousel 5, promotes carousel 5 and moves along bar groove 11 length direction when riser 123 removes.

The implementation principle of the winding device for producing the film capacitor is as follows: after the winding process is finished, the horizontal air cylinder 4 works, the horizontal plate 42 is moved to the lower part of the winding roller 2, the separation air cylinder 132 is matched with the sliding plate 13, the winding roller 2 is separated from the driving piece 3, meanwhile, the winding roller 2 is separated from the sliding plate 13, the horizontal plate 42 and the pushing plate 41 drive the winding roller 2 to move, the winding roller 2 is inserted into the mounting groove 51, the locking piece 52 is used for connecting and fixing the winding roller 2 and the turntable 5, the pushing piece 12 is used for pushing the turntable 5 and the winding roller 2 to move along the length direction of the strip-shaped groove 11, manual operation of a worker is not needed in the discharging process of the winding roller 2, and the workload of the worker is reduced.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. Winding device for producing film capacitors, comprising a support plate (1), characterized in that: the utility model provides a backup pad (1) is equipped with around roller (2) and is used for the drive to wind roller (2) pivoted driving piece (3), around roller (2) and driving piece (3) detachable connection, backup pad (1) fixedly connected with horizontal cylinder (4), horizontal cylinder (4) output shaft fixedly connected with push pedal (41), tip fixedly connected with horizontal plate (42) under push pedal (41), two bar grooves (11) parallel to each other have been seted up in backup pad (1), backup pad (1) sliding connection has two carousel (5), two carousel (5) are located two bar grooves (11) respectively, carousel (5) have been seted up with around roller (2) looks adaptation mounting groove (51), carousel (5) are equipped with and are used for fixed retaining member (52) around roller (2), backup pad (1) are equipped with and are used for promoting two carousel (5) synchronous pivoted propelling movement piece (12).

2. A winding device for producing a film capacitor as defined in claim 1, wherein: the pushing piece (12) comprises a pushing screw (121), a transverse plate (122) and two vertical plates (123), the pushing screw (121) is rotationally connected inside the supporting plate (1), the pushing screw (121) penetrates through the transverse plate (122) and is in threaded connection with the transverse plate (122), the transverse plate (122) is slidably connected inside the supporting plate (1), the two vertical plates (123) are fixedly connected to two ends of the transverse plate (122) respectively, sliding grooves (124) which are matched with the vertical plates (123) and are communicated with the strip-shaped grooves (11) are formed in the supporting plate (1), and the upper end parts of the vertical plates (123) penetrate through the sliding grooves (124) and the strip-shaped grooves (11).

3. A winding device for producing a film capacitor as defined in claim 1, wherein: the locking piece (52) comprises a bidirectional screw rod (521) and two movable plates (522), wherein two ends of the bidirectional screw rod (521) are respectively connected with the two turntables (5) in a rotating mode, two movable plates (522) are respectively arranged at two ends of the bidirectional screw rod (521) in a penetrating mode and are in threaded connection with the movable plates (522), locking blocks (523) are fixedly connected with the two movable plates (522), the locking blocks (523) are arranged between the two movable plates (522), limiting rods (524) are fixedly connected with the turntables (5), and the limiting rods (524) are arranged in the corresponding movable plates (522) in a penetrating mode and are in sliding connection with the movable plates (522).

4. A winding device for producing a film capacitor as defined in claim 1, wherein: the driving piece (3) comprises a driving motor (31) and a connecting rod (32), wherein the supporting plate (1) is fixedly connected with a vertical plate (33), the driving motor (31) is fixedly connected with the vertical plate (33), an output shaft of the driving motor (31) penetrates through the vertical plate (33) and is fixedly connected with the connecting rod (32), a jack (34) matched with the winding roller (2) is formed in the connecting rod (32), a limit bar (35) is fixedly connected with the winding roller (2), a limit groove (36) matched with the limit bar (35) and communicated with the jack (34) is formed in the connecting rod (32), a sliding plate (13) is connected with the supporting plate (1) in a sliding mode, and a through hole (131) matched with the winding roller (2) is formed in the sliding plate (13).

5. A winding device for producing a film capacitor as defined in claim 4, wherein: the sliding plate (13) is fixedly connected with a separation cylinder (132), the output end of the separation cylinder (132) is fixedly connected with a connecting plate (133), and the connecting plate (133) is fixedly connected with a pneumatic clamping jaw (134) which is matched with the winding roller (2).

6. A winding device for producing a film capacitor as defined in claim 5, wherein: the pneumatic clamping jaw (134) is fixedly connected with a convex strip (135), and a groove (136) matched with the convex strip (135) is formed in the winding roller (2).

7. A winding device for producing a film capacitor as defined in claim 4, wherein: the support plate (1) is fixedly connected with a mobile motor (14), an output shaft of the mobile motor (14) is fixedly connected with a mobile screw rod (141), the lower end part of the sliding plate (13) is fixedly connected with a sliding block (142), the mobile screw rod (141) penetrates through the sliding block (142) and is in threaded connection with the sliding block (142), and a mobile groove (143) matched with the sliding block (142) is formed in the support plate (1).

8. A winding device for producing a film capacitor as defined in claim 1, wherein: the two ends of the horizontal plate (42) along the length direction are fixedly connected with baffle plates (421).