CN216778400U

CN216778400U - Adsorber convenient to maintain

Info

Publication number: CN216778400U
Application number: CN202122650028.8U
Authority: CN
Inventors: 张平; 马银海; 陈杰
Original assignee: Shaoxing Zhongte Machinery Manufacturing Co ltd
Current assignee: Shaoxing Zhongte Machinery Manufacturing Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-06-21
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses an adsorber convenient to maintain, which comprises an adsorption chamber, an opening and an adsorption layer; a sealing plate is rotationally connected in the adsorption chamber; a torsional spring is arranged at the joint of the sealing plate and the adsorption chamber; a cleaning device is arranged in the adsorption chamber; the cleaning device comprises a scraper, a driving component and a shaking component; the upper end and the lower end of one side of the scraper are respectively provided with an elastic metal sheet; a scraping strip is fixed at the end part of the elastic metal sheet; according to the utility model, by arranging the sealing plate, when the adsorption layer needs to be maintained, the adsorption layer is only required to be taken out from the opening, and the sealing plate rotates under the action of the torsion spring to automatically seal the opening, so that the adsorption layer can be maintained and replaced without shutdown, and the adsorption device is convenient to maintain; in the working process of the adsorber, the driving component drives the scraping plate to move up and down, so that the scraping strip can clean the surface of the adsorber; meanwhile, the shaking component drives the adsorption layer to shake, and the cleaning effect is enhanced.

Description

Adsorber convenient to maintain

Technical Field

The utility model belongs to the technical field of adsorbers, and particularly relates to an adsorber convenient to maintain.

Background

In industrial production, a large amount of harmful gas is generated, the harmful gas is directly discharged into the air to pollute the air, the active carbon is a granular object which is processed from coal, wood chips and shells and can adsorb the harmful gas, the generated harmful gas is purified by the active carbon in industrial production, and the active carbon loses activity after long-term use, so that the active carbon needs to be replaced regularly in order to ensure the effectiveness of purifying the harmful gas; the existing activated carbon adsorber is inconvenient to replace the activated carbon adsorption layer, and the maintenance work is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides an adsorber convenient to maintain in order to overcome the defects of the prior art.

The technical scheme provided by the utility model is as follows: an adsorber convenient to maintain comprises an adsorption chamber, a plurality of openings arranged on the adsorption chamber, and an adsorption layer arranged in the adsorption chamber from the openings; a sealing plate is rotatably connected to one side of the bottom of the opening in the adsorption chamber; a torsional spring is arranged at the joint of the sealing plate and the adsorption chamber; two ends of the torsion spring are respectively fixed on the sealing plate and the adsorption chamber; cleaning devices which correspond to the openings one by one are arranged in the adsorption chamber; the cleaning device is positioned on the other side of the bottom of the opening; the cleaning device comprises a scraping plate for cleaning the surface of the adsorption layer, a driving assembly for driving the scraping plate to move up and down and a shaking assembly for shaking the adsorption layer; the upper end and the lower end of one side of the scraper are respectively provided with an elastic metal sheet; a scraping strip is fixed at the end part of the elastic metal sheet; the scraping strip is abutted against the surface of the adsorption layer.

Furthermore, a plurality of straight grooves are respectively arranged on two sides of the adsorption chamber; the two ends of the scraper are provided with first magnetic blocks; the first magnetic block is inserted into the straight groove and can slide up and down along the straight groove; a plurality of transmission grooves which correspond to the straight grooves one by one are arranged on two sides of the adsorption chamber; the transmission groove is isolated from the straight groove; the driving assembly comprises a screw rod rotationally connected in the transmission groove, a square block sleeved on the screw rod and in threaded connection with the screw rod, a second magnetic block fixed outside the square block and mutually attracted with the first magnetic block, belt wheels arranged outside the adsorption chamber and coaxially connected with the screw rod, and a motor driving each belt wheel to rotate through a belt; the motor is fixed at the bottom outside the adsorption chamber.

Furthermore, two sides of the opening are respectively provided with a through groove; two sides of the adsorption layer are inserted into the through grooves; one side of the through groove is communicated with the transmission groove through a sliding groove; an L-shaped block is arranged on the side of the second magnetic block; the L-shaped block is inserted into the through groove from the sliding groove; the shaking assembly comprises a sliding block, a limiting strip, a guide strip, a first spring, a push plate and a second spring, wherein the sliding block is sleeved at the end part of the L-shaped block and is in sliding connection with the L-shaped block, the limiting strip is positioned on one side, close to the transmission groove, of the sliding block, the guide strip is positioned between the sliding block and the limiting strip, the first spring is fixed between the bottom of the limiting strip and the bottom of the through groove, the push plate is connected to the other side of the through groove in a sliding mode, and the second spring is fixed between the push plate and the side wall of the through groove; the push plate and the slide block are respectively positioned on the front surface and the back surface of the adsorption layer and are in contact with the adsorption layer; a cavity is arranged inside the sliding block; the L-shaped block is inserted into the cavity and can slide along the cavity; a plurality of first flanges are arranged on one side, close to the guide strip, of the sliding block; one side of the guide strip is provided with a second flange which can be contacted with the first flange; a first trapezoidal layer is arranged on the other side of the guide strip; the surface of the limiting strip is provided with a second trapezoidal layer; the second trapezoidal layer is mutually abutted with the first trapezoidal layer; a connecting layer is arranged at the top of the adsorption layer; the top of the limiting strip is abutted to the connecting layer.

Furthermore, one end of the push plate extends out of the through groove and is provided with a baffle; the baffle abuts against the inner wall of the adsorption chamber; the top of the baffle is provided with a push block; the push block is positioned on the side of the sealing plate and can be contacted with the sealing plate.

Furthermore, locking grooves corresponding to the openings one by one are formed in the top of the adsorption chamber; the locking groove is internally and slidably connected with a locking block; one end of the locking block is rotatably connected with a plurality of rubber rollers; the connecting layer is provided with a slot; the rubber roller can be inserted into the slot; supporting strips are respectively arranged on two sides of the bottom outside the adsorption chamber; the bottoms of the belt wheel and the screw rod are rotationally connected in the supporting bar; the top of the screw rod penetrates out of the transmission groove and abuts against the connecting layer; the bottom of the supporting bar is provided with a connecting sheet; a third spring is fixed at the bottom of the connecting piece; the bottom of the third spring is fixed on the spacer; the top of the spacer is provided with a plurality of connecting strips penetrating through the connecting sheet; a clamping groove is formed in the screw; a trapezoidal block is connected in the belt wheel in a sliding manner; a fourth spring is fixed between the trapezoidal block and the belt wheel; the trapezoidal block is inserted into the clamping groove.

In summary, by arranging the sealing plate, when the adsorption layer needs to be maintained, the adsorption layer is only required to be taken out from the opening, and the sealing plate rotates under the action of the torsion spring to automatically seal the opening, so that the adsorption layer can be maintained and replaced without shutdown, and the adsorption device is convenient to maintain; in the working process of the adsorber, the driving component drives the scraping plate to move up and down, so that the scraping strip can clean the surface of the adsorber; meanwhile, the shaking component drives the adsorption layer to shake, and the cleaning effect is enhanced.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is an isometric cross-sectional view taken along line C-C of fig. 1.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is an isometric cross-sectional view taken along line D-D of fig. 1.

Fig. 5 is a partially enlarged view of a portion B in fig. 4.

Fig. 6 is an isometric cross-sectional view taken along line E-E of fig. 1.

Fig. 7 is a partially enlarged view of portion F of fig. 6.

Fig. 8 is a partially enlarged view of a portion G in fig. 6.

FIG. 9 is a schematic structural diagram of the push plate of FIG. 7.

Fig. 10 is a schematic structural view of the sealing plate in fig. 3.

Fig. 11 is a schematic structural view of the stopper bar in fig. 7.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1-11, an adsorber for facilitating maintenance comprises an adsorption chamber 1, a plurality of openings 11 formed in the adsorption chamber 1, and an adsorption layer 2 installed in the adsorption chamber 1 from the openings 11; one side of the adsorption chamber 1, which is positioned at the bottom of the opening 11, is rotatably connected with a sealing plate 3; a torsional spring 4 is arranged at the joint of the sealing plate 3 and the adsorption chamber 1; two ends of a torsion spring 4 are respectively fixed on the closing plate 3 and the adsorption chamber 1; cleaning devices 5 which are in one-to-one correspondence with the openings 11 are arranged in the adsorption chamber 1; the cleaning device 5 is positioned at the other side of the bottom of the opening 11; the cleaning device 5 comprises a scraper 51 for cleaning the surface of the adsorption layer 2, a driving component 6 for driving the scraper 51 to move up and down, and a shaking component 7 for shaking the adsorption layer 2; the upper and lower ends of one side of the scraper 51 are respectively provided with an elastic metal sheet 511; a scraping strip 512 is fixed at the end part of the elastic metal sheet 511; the scraping strip 512 abuts against the surface of the adsorption layer 2.

The adsorption layer 2 is purchased from the market and used for adsorbing harmful substances in industrial gas, and the principle is not described again; when the adsorption device is used, industrial gas enters the adsorption chamber 1 from one end of the adsorption chamber 1, is purified by the adsorption layer 2 and then is moved out of the adsorption chamber 1 from the other side of the adsorption chamber 1; the scraping plate 51 is positioned at the side of the opening 11 close to the industrial gas inlet, and the driving assembly 6 drives the scraping plate 51 to move up and down, so that the scraping strip 512 cleans the surface of the adsorption layer 2, the service life of the adsorption layer 2 is prolonged, the maintenance interval of the adsorption layer 2 is prolonged, and the maintenance cost is reduced; the shaking component 7 can drive the adsorption layer 2 to shake left and right when the scraper 51 moves up and down, so that impurities cleaned by the scraping strips 512 are prevented from being adsorbed on the adsorption layer 2 again, the cleaning effect is guaranteed, and the scraping strips 512 are always attached to the surface of the adsorption layer 2 when the adsorption layer 2 shakes due to the arrangement of the elastic metal sheets 511, so that the cleaning effect is guaranteed; a collecting box 8 is inserted into the bottom in the adsorption chamber 1 and used for collecting impurities cleaned by the scraping strips 512, so that subsequent treatment is facilitated; when the adsorption layer 2 needs to be taken down for maintenance or replacement, the adsorption layer is pulled out from the opening 11, and at the moment, the sealing plate 3 is turned to the bottom of the opening 11 under the action of the torsion spring 4, and the opening 11 is sealed; by arranging the sealing plate 3, the adsorption layer 2 to be maintained is taken down under the condition that the absorber does not need to be stopped, and other adsorption layers 2 can normally work, so that the maintenance work is facilitated; when putting into opening 11 with new adsorbed layer 2, adsorbed layer 2 promotes shrouding 3 and rotates to vertical state, is convenient for install adsorbed layer 2 in adsorption chamber 1.

Furthermore, a plurality of straight grooves 12 are respectively arranged on two sides of the adsorption chamber; two ends of the scraper 51 are provided with first magnetic blocks 513; the first magnetic block 513 is inserted into the straight slot 12 and can slide up and down along the straight slot 12; a plurality of transmission grooves 13 which are in one-to-one correspondence with the straight grooves 12 are arranged on two sides of the adsorption chamber; the transmission groove 13 and the straight groove 12 are mutually isolated; the driving assembly 6 comprises a screw 61 rotatably connected in the transmission groove 13, a square block 62 sleeved on the screw 61 and in threaded connection with the screw, a second magnetic block 621 fixed outside the square block 62 and mutually attracted with the first magnetic block 513, a belt wheel 63 arranged outside the adsorption chamber 1 and coaxially connected with the screw 61, and a motor 64 driving each belt wheel 63 to rotate through a belt; the motor 64 is fixed at the outer bottom of the adsorption chamber 1.

The straight groove 12 is used for limiting the moving direction of the scraper 51 and enabling the scraper to move stably; when the cleaning tool is used, the motor 64 drives each belt wheel 63 to rotate, so that the screw rod 61 rotates, the square block 62 and the second magnetic block 621 move up and down along with the reciprocating rotation of the motor 64, and the scraper 51 moves synchronously through the mutual attraction of the first magnetic block 513 and the second magnetic block 621, so that the surface of the adsorption layer 2 is cleaned; the transmission groove 13 and the adsorption chamber 1 are isolated from each other, impurities in the adsorption chamber 1 are isolated outside the transmission groove 13, and the service life of the transmission assembly is guaranteed.

Furthermore, two sides of the opening 11 are respectively provided with a through groove 14; two sides of the adsorption layer 2 are inserted into the through grooves 14; one side of the through groove 14 is communicated with the transmission groove 13 through a sliding groove 17; an L-shaped block 622 is arranged on the side of the second magnetic block 621; l-shaped block 622 is inserted into through slot 14 from slide slot 17; the shaking assembly 7 comprises a sliding block 71 sleeved at the end part of the L-shaped block 622 and connected with the L-shaped block in a sliding manner, a limiting strip 72 positioned at one side of the sliding block 71 close to the transmission groove 13, a guide strip 73 positioned between the sliding block 71 and the limiting strip 72, a first spring 721 fixed between the bottom of the limiting strip 72 and the bottom of the through groove 14, a push plate 74 connected with the other side of the through groove 14 in a sliding manner, and a second spring 741 fixed between the push plate 74 and the side wall of the through groove 14; the push plate 74 and the slide block 71 are respectively positioned on the front surface and the back surface of the adsorption layer 2 and are in contact with the adsorption layer 2; a cavity 711 is arranged inside the sliding block 71; an L-shaped block 622 inserted into the cavity 711 and slidable along the cavity 711; the slider 71 is provided with a plurality of first flanges 712 on a side close to the guide bar 73; a second flange 731 which can contact with the first flange 712 is arranged on one side of the guide bar 73; the other side of the guide strip 73 is provided with a first trapezoidal layer 732; a second trapezoidal layer 722 is arranged on the surface of the limiting strip 72; the second trapezoidal layer 722 and the first trapezoidal layer 732 abut against each other; the top of the adsorption layer 2 is provided with a connecting layer 21; the top of the limiting strip 72 is abutted against the connecting layer 21.

When the motor 64 drives the second magnetic block 621 to move up and down, the L-shaped bar moves up and down along the sliding groove 17, the first flange 712 gradually contacts each second flange 731, the second trapezoidal layer 722 limits the sliding of the first trapezoidal layer 732, so that the sliding block 71 is pushed to slide relative to the L-shaped block 622 and the adsorption layer 2 is driven to move transversely, and the second spring 741 drives the push plate 74 to move so as to reset the adsorption layer 2, so that the adsorption layer 2 can move back and forth, and impurities on the surface of the adsorption layer 2 can be shaken off; when the adsorption layer 2 is taken out from the opening 11, the connection layer 21 is separated from the limiting strip 72, the first spring 721 drives the limiting strip 72 to move upwards, the second trapezoidal layer 722 is staggered with the first trapezoidal layer 732, at the moment, the second spring 741 pushes the push plate 74, the slide block 71 and the guide strip 73 are in a synchronous east China state until the push plate 74 contacts the wall surface of the through groove 14 to seal the through groove 14, and impurities are prevented from being accumulated in the through groove 14 after the adsorption layer 2 is taken out; after the adsorption layer 2 is inserted into the adsorption chamber 1, the connection layer 21 pushes the limiting strip 72 to move downwards, and the second trapezoidal layer 722 abuts against the first trapezoidal layer 732 so as to push the adsorption layer 2 to move transversely again.

Further, one end of the push plate 74 extends out of the through slot 14 and is provided with a baffle 742; the baffle 742 abuts against the inner wall of the adsorption chamber 1; a push block 743 is arranged on the top of the baffle 742; the pushing block 743 is located at the side of the sealing plate 3 and can contact with the sealing plate 3.

After the adsorption layer 2 is taken out from the opening 11, the sealing plate 3 rotates to close the opening 11, the baffle 742 slides synchronously with the push plate 74 under the action of the second spring 741 until the push block 743 contacts the sealing plate 3; when the adsorption layer 2 is inserted into the adsorption chamber 1 again, the closing plate 3 pushes the push block 743 while rotating, so that the push plate 74 slides, the through groove 14 is opened, and the adsorption layer 2 can be smoothly placed into the adsorption chamber 1, thereby facilitating installation.

Furthermore, locking grooves 15 corresponding to the openings 11 one by one are formed in the outer top of the adsorption chamber 1; a locking block 151 is slidably connected in the locking groove 15; one end of the locking block 151 is rotatably connected with a plurality of rubber rollers 152; the connecting layer 21 is provided with a slot 22; the rubber roller 152 may be inserted into the slot 22; the two sides of the outer bottom of the adsorption chamber 1 are respectively provided with a support strip 16; the belt wheel 63 and the bottom of the screw 61 are rotatably connected in the support bar 16; the top of the screw rod 61 penetrates out of the transmission groove 13 and is propped against the connecting layer 21; the bottom of the supporting bar 16 is provided with a connecting sheet 611; the bottom of the connecting piece 611 is fixed with a third spring 612; the bottom of the third spring 612 is fixed to a spacer 613; the top of the spacer 613 is provided with a plurality of connecting strips 614 passing through the connecting piece 611; a clamping groove 615 is arranged on the screw 61; a trapezoidal block 631 is connected inside the belt wheel 63 in a sliding manner; a fourth spring 632 is fixed between the trapezoid block 631 and the pulley 63; the trapezoidal blocks 631 are inserted into the card slots 615.

When the absorber works normally, one end of the locking block 151 is embedded into the slot 22 to limit the adsorption layer 2 so that the adsorption layer 2 is stabilized in the adsorption chamber 1, and the rubber roller 152 reduces the resistance of the adsorption layer 2 during transverse movement; the fourth spring 632 drives the trapezoidal block 631 to be embedded into the slot 615, so that the screw 61 can synchronously rotate when the motor 64 drives the belt pulley 63 to rotate; when the adsorption layer 2 needs to be taken out, the locking block 151 is pushed to be separated from the slot 22, so that the adsorption layer 2 can be taken out from the opening 11, when the adsorption layer 2 is taken out, the third spring 612 pushes the connecting piece 611 to enable the screw 61 to move upwards, the trapezoidal block 631 is separated from the slot 615, at this time, the belt wheel 63 rotates to stop driving the screw 61 to rotate, so that the sliding block 71 stops moving, and the sliding block 71 is prevented from pushing the push plate 74 to open the through slot 14; when the adsorption layer 2 is placed in the adsorption chamber 1 again, the connection layer 21 extrudes the screw 61 to move downward, and the fourth spring 632 drives the trapezoidal block 631 to be embedded into the clamping groove 615, so that the screw 61 can continue to rotate, and the shaking assembly 7 and the scraper 51 can work normally; the spacer 613 is used to separate the third spring 612 from the support bar 16, and the connecting bar 614 is provided to allow the spacer 613 to rotate synchronously when the screw 61 rotates, thereby preventing the third spring 612 from being damaged.

Claims

1. An absorber convenient for maintenance comprises an absorption chamber (1), a plurality of openings (11) arranged on the absorption chamber (1), and an absorption layer (2) arranged in the absorption chamber (1) from the openings (11); the method is characterized in that: a sealing plate (3) is rotatably connected to one side, positioned at the bottom of the opening (11), in the adsorption chamber (1); a torsion spring (4) is arranged at the joint of the sealing plate (3) and the adsorption chamber (1); two ends of the torsion spring (4) are respectively fixed on the sealing plate (3) and the adsorption chamber (1); cleaning devices (5) which are in one-to-one correspondence with the openings (11) are arranged in the adsorption chamber (1); the cleaning device (5) is positioned on the other side of the bottom of the opening (11); the cleaning device (5) comprises a scraper (51) for cleaning the surface of the adsorption layer (2), a driving component (6) for driving the scraper (51) to move up and down, and a shaking component (7) for shaking the adsorption layer (2); the upper end and the lower end of one side of the scraper (51) are respectively provided with an elastic metal sheet (511); a scraping strip (512) is fixed at the end part of the elastic metal sheet (511); the scraping strip (512) is abutted against the surface of the adsorption layer (2).

2. The adsorber for facilitating maintenance of claim 1, wherein: a plurality of straight grooves (12) are respectively arranged on two sides of the adsorption chamber; two ends of the scraper (51) are provided with first magnetic blocks (513); the first magnetic block (513) is inserted into the straight groove (12) and can slide up and down along the straight groove (12); a plurality of transmission grooves (13) which correspond to the straight grooves (12) one by one are arranged on two sides of the adsorption chamber; the transmission groove (13) and the straight groove (12) are mutually isolated; the driving assembly (6) comprises a screw rod (61) rotatably connected in the transmission groove (13), a square block (62) sleeved on the screw rod (61) and in threaded connection with the screw rod, a second magnetic block (621) fixed outside the square block (62) and mutually attracted with the first magnetic block (513), a belt wheel (63) arranged outside the adsorption chamber (1) and coaxially connected with the screw rod (61), and a motor (64) driving each belt wheel (63) to rotate through a belt; the motor (64) is fixed at the outer bottom of the adsorption chamber (1).

3. An adsorber for facilitating maintenance according to claim 2 wherein: two sides of the opening (11) are respectively provided with a through groove (14); two sides of the adsorption layer (2) are inserted into the through grooves (14); one side of the through groove (14) is communicated with the transmission groove (13) through a sliding groove (17); an L-shaped block (622) is arranged on the side of the second magnetic block (621); the L-shaped block (622) is inserted into the through groove (14) from the sliding groove (17); the shaking assembly (7) comprises a sliding block (71) which is sleeved at the end part of the L-shaped block (622) and is in sliding connection with the L-shaped block, a limiting strip (72) which is positioned on one side, close to the transmission groove (13), of the sliding block (71), a guide strip (73) which is positioned between the sliding block (71) and the limiting strip (72), a first spring (721) which is fixed between the bottom of the limiting strip (72) and the bottom of the through groove (14), a push plate (74) which is in sliding connection with the other side of the through groove (14), and a second spring (741) which is fixed between the push plate (74) and the side wall of the through groove (14); the push plate (74) and the slide block (71) are respectively positioned on the front surface and the back surface of the adsorption layer (2) and are in contact with the adsorption layer (2); a cavity (711) is arranged in the sliding block (71); the L-shaped block (622) is inserted into the cavity (711) and can slide along the cavity (711); a plurality of first flanges (712) are arranged on one side of the sliding block (71) close to the guide strip (73); a second flange (731) which can be contacted with the first flange (712) is arranged on one side of the guide strip (73); a first trapezoidal layer (732) is arranged on the other side of the guide strip (73); a second trapezoidal layer (722) is arranged on the surface of the limiting strip (72); the second trapezoidal layer (722) and the first trapezoidal layer (732) are mutually abutted; the top of the adsorption layer (2) is provided with a connecting layer (21); the top of the limiting strip (72) is abutted against the connecting layer (21).

4. An adsorber for facilitating maintenance according to claim 3 wherein: one end of the push plate (74) extends out of the through groove (14) and is provided with a baffle plate (742); the baffle (742) is abutted against the inner wall of the adsorption chamber (1); the top of the baffle plate (742) is provided with a push block (743); the push block (743) is located on the side of the sealing plate (3) and can be in contact with the sealing plate (3).

5. An adsorber for facilitating maintenance according to claim 3 wherein: the outer top of the adsorption chamber (1) is provided with locking grooves (15) which correspond to the openings (11) one by one; the locking groove (15) is connected with a locking block (151) in a sliding way; one end of the locking block (151) is rotatably connected with a plurality of rubber rollers (152); the connecting layer (21) is provided with a slot (22); the rubber roller (152) can be inserted into the slot (22); support strips (16) are respectively arranged on two sides of the outer bottom of the adsorption chamber (1); the bottoms of the belt wheel (63) and the screw rod (61) are rotatably connected in the support bar (16); the top of the screw rod (61) penetrates out of the transmission groove (13) and abuts against the connecting layer (21); the bottom of the supporting bar (16) is provided with a connecting piece (611); a third spring (612) is fixed at the bottom of the connecting piece (611); the bottom of the third spring (612) is fixed on a spacer (613); the top of the spacer (613) is provided with a plurality of connecting strips (614) which penetrate through the connecting sheets (611); a clamping groove (615) is formed in the screw rod (61); a trapezoidal block (631) is connected in the belt wheel (63) in a sliding manner; a fourth spring (632) is fixed between the trapezoidal block (631) and the belt wheel (63); the trapezoidal block (631) is inserted into the card slot (615).