Asphalt preparation process

Abstract

The present invention belongs to the technical field of asphalt processing, and in particular to an asphalt preparation process; the present invention provides an asphalt preparation process, comprising the following steps: S1: first preheating a circulation part in a filter pressure device, so that the asphalt material becomes soft at high temperature when passing through the circulation part, so that the asphalt materials are easy to adhere to each other; S2: controlling a stirring part in the filter pressure device to fully stir the asphalt material so that the air mixed between the asphalt materials can be discharged; S3: changing the position between the stirring part and the circulation part so that the device can adjust the processing force of the asphalt material; the filter pressure device includes a circulation part for providing a circulation space for the asphalt material, and a stirring part that can move on the circulation part, and a protruding component is provided on the stirring part for separating the asphalt materials bonded together, and the relative position between the stirring part and the circulation part can be changed; the present invention can improve the adhesion between the asphalt materials.

Description

Technical Field

[0001] The invention belongs to the technical field of asphalt processing, and in particular relates to an asphalt preparation process. Background Art

[0002] For example, application number 201720871524.7 is a natural asphalt processing equipment, a natural asphalt processing equipment, a natural asphalt feeding port, a primary crushing device, a drying system, a secondary crushing device, a weighing meter, and a dispersion tank are connected in sequence, the dispersion tank is connected to the raw material tank on one path, and is connected to three development tanks on the other path, the three development tanks are connected in sequence and are connected to the first, second, and third stage ball mills respectively, one of which is connected to two mother liquid tanks in parallel pipelines, the two mother liquid tanks are connected to two proportioning tanks, the two proportioning tanks are connected to the two raw material tanks, the additive feeding port is connected to a proportioning tank, the other proportioning tank is connected to a modifier feeder on one path, and is connected to a high-speed shear colloid mill, a modified asphalt development tank, and an additive adding device on the other path, one of which is connected to a finished product tank, a proportioning tank is connected to a finished product tank, and two finished product tanks are connected to an oil-generating platform. The equipment can refine the solid asphalt through process treatment and evenly disperse it in asphalt and other media, and the product quality is stable and reliable and can be stored for a long time without segregation; however, the utility model is not convenient for improving the adhesion between asphalt materials. Summary of the invention

[0003] In view of this, the technical problem to be solved by the present invention is to provide an asphalt preparation process, which can improve the adhesion between asphalt materials.

[0004] The present invention provides an asphalt preparation process, comprising the following steps:

[0005] S1: First, preheat the flow part in the filter press device so that the asphalt material becomes soft at high temperature when passing through the flow part, so that the asphalt materials are easy to bond with each other;

[0006] S2: Control the stirring part in the filter press device to fully stir the asphalt material so that the air trapped between the asphalt materials can be discharged;

[0007] S3: Changing the position between the stirring part and the circulation part so that the processing force of the device on the asphalt material can be adjusted.

[0008] The filter press device includes a circulation part for providing a circulation space for asphalt material, and a stirring part that can move on the circulation part. The stirring part is provided with a protruding component for separating the asphalt materials that are stuck together. The relative position between the stirring part and the circulation part can be changed.

[0009] By allowing the asphalt material to circulate in the circulation portion and heating the circulation portion, the temperature of the asphalt material in the circulation portion can be increased, so that the asphalt materials can be softened at high temperature and easily bonded together.

[0010] The circulation part includes a semi-through box and a connecting piece. Two semi-through boxes are provided. The two semi-through boxes are symmetrically installed to form a sliding channel. The two semi-through boxes are connected by multiple connecting pieces. The sliding channel is arranged in a serpentine shape. The middle of the serpentine sliding channel is low and the two ends are high. The two semi-through boxes are connected to the ground through brackets.

[0011] Two symmetrically arranged half-through boxes are installed together through connecting pieces. This design makes it easy to disassemble the two half-through boxes, thereby facilitating full cleaning of the inside and outside of the half-through boxes, thereby helping to reduce the residue of asphalt materials during the long-term use of the device and improving the maintenance effect of the device.

[0012] The two semi-through boxes are respectively provided with slideways, and the tracks of the two slideways are the same but the positions are different.

[0013] The two semi-through boxes are respectively provided with slideways, and the tracks of the two slideways are arranged oppositely.

[0014] The beneficial effects of the filter press device used in the asphalt preparation process of the present invention are:

[0015] A retention area can be set on the circulation part, and the retention area is lower than the height of the outlet of the circulation part on the normal line of the horizontal plane. This design can improve the retention effect of the asphalt material in the circulation part; the design of the retention area improves the filling strength required when filling the asphalt material into the circulation part, so that when the asphalt material is discharged from the circulation part, the internal stress between the asphalt materials is enhanced when the filling strength increases, and then the discharged asphalt product can have better adhesion, making the fitting effect between the asphalt materials more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 A schematic diagram of the structure of the first embodiment of the circulation part provided by the present invention;

[0018] Figure 2 A schematic diagram of the structure of the second embodiment of the circulation unit provided by the present invention;

[0019] Figure 3 A schematic diagram of the structure of the hole tube provided by the present invention;

[0020] Figure 4 A schematic diagram of the structure of the sliding sleeve provided by the present invention;

[0021] Figure 5 A schematic diagram of the structure of a frustum provided by the present invention;

[0022] Figure 6 A schematic diagram of the structure of the chute provided by the present invention;

[0023] Figure 7 A schematic diagram of the structure of the piercing table provided by the present invention;

[0024] Figure 8 A schematic diagram of the structure of the slide bar provided by the present invention;

[0025] Fig. 9 A schematic diagram of the structure of the support base provided by the present invention;

[0026] Fig.10 A schematic diagram of the structure of the vertical bar provided by the present invention;

[0027] Fig.11 A schematic diagram of the structure of the horizontal platform provided by the present invention;

[0028] Fig.12 A schematic diagram of the structure of the rotation-limiting rod provided by the present invention;

[0029] Fig.13 This is a schematic structural diagram of the hinge ring provided by the present invention.

[0030] In the figure:

[0031] Semi-pass box 1.1;

[0032] Slide 1.2;

[0033] Connecting piece 1.3;

[0034] Heating column 1.4;

[0035] Sliding sleeve 2.1;

[0036] Hole cylinder 2.2;

[0037] Rotating sleeve 2.3;

[0038] Handle 2.4;

[0039] Support seat 3.1;

[0040] Gear motor 3.2;

[0041] Screw 3.3;

[0042] Telescopic core 4.1;

[0043] Cone 4.2;

[0044] Chute 4.3;

[0045] Stirring column 5.1;

[0046] Slide bar 5.2;

[0047] Thorn platform 5.3;

[0048] Mobile rack 6.1;

[0049] Slide 6.2;

[0050] horizontal platform 6.3;

[0051] Slide arm 6.4;

[0052] Baffle 7.1;

[0053] vertical bar 7.2;

[0054] Rotation limiter 7.3;

[0055] Connecting arm 7.4;

[0056] Articulated ring 7.5. DETAILED DESCRIPTION

[0057] In conjunction with the drawings in the embodiments of the present invention, an asphalt preparation process provided by the present invention is described in detail.

[0058] As a further improved technical solution of the present invention, see Figure 1-8 :

[0059] The stirring part is controlled to move in the circulation part, so that the extended component on the stirring part can stir the asphalt material, and the air mixed between the asphalt materials can be discharged during the stirring process;

[0060] Furthermore, the design of stirring the high-temperature asphalt material can improve the mixing effect between the various asphalt materials, thereby improving the processing performance of the device;

[0061] Two stirring parts can be provided, and the two stirring parts are symmetrically installed. The two stirring parts are moved at the same time, which can improve the effect of the device on stirring the asphalt material. When the two stirring parts are symmetrically provided, when the stirring parts are controlled to stir in the asphalt material, the large pieces of material in the asphalt material are squeezed under the action of the two stirring parts, so that the device can crush the larger pieces of asphalt material, so that the texture of the asphalt product processed by the device is finer.

[0062] The fixed distance between the two stirring parts enables the device to filter out large pieces of asphalt materials in an intercepting manner, thereby making the texture of the asphalt product processed by the device more uniform;

[0063] A retention area may be provided on the circulation part, and the retention area is lower than the height of the outlet of the circulation part on the normal line of the horizontal plane. This design can improve the retention effect of the asphalt material in the circulation part;

[0064] The design of the retention area increases the filling strength required when filling the asphalt material into the circulation part, so that when the asphalt material is discharged from the circulation part, the internal stress between the asphalt materials is enhanced under the condition of increased filling strength, and then the discharged asphalt product can have better adhesion, making the bonding effect between the asphalt materials more compact;

[0065] The stirring part can stir at the outlet of the flow part;

[0066] From another perspective, the stirring part can stir at the side of the circulation part. At this time, it is necessary to groove the side of the circulation part and make the stirring part slide in the groove. At this time, it is necessary to install a baffle between the outside of the groove and the circulation part to prevent the asphalt material from flowing out of the groove, thereby improving the use effect of the device.

[0067] The cleaning effect of the half-pass box 1.1 is improved, so that the initial output of the asphalt material can maintain a higher quality each time the device processes the asphalt material, and the influence of the residual asphalt material on the newly produced material is reduced;

[0068] The design of the serpentine sliding channel can improve the retention effect of the sliding channel on asphalt materials;

[0069] The design of the sliding channel being low in the middle and high at both ends increases the filling strength required when filling asphalt material into the sliding channel. As a result, when the asphalt material is discharged from the sliding channel, the internal stress between the asphalt materials is enhanced as the filling strength increases, thereby enabling the discharged asphalt product to have better adhesion and making the fitting effect between the asphalt materials tighter.

[0070] The slideway 1.2 is used to provide a sliding space for the stirring part. The two half-pass boxes 1.1 are symmetrically installed, and the tracks of the two slideways 1.2 are the same but the positions are different. When the two stirring parts slide in the two slideways 1.2 respectively, the distance between the two stirring parts in the direction of the normal line of the horizontal plane is kept equal, so that the two protruding components can filter out the larger particles of asphalt materials in the sliding channel when intercepting;

[0071] When the two stirring parts are controlled to slide in the two sliding channels respectively, the positions of the ends of the two stirring parts need to be fixed, so as to improve the effect of synchronous movement of the two stirring parts.

[0072] The design of the relative arrangement of the tracks of the two slideways 1.2 enables the spacing between the two stirring parts in the normal direction of the horizontal plane to change when the two stirring parts move in the slideway 1.2, and the change state is a periodic change, thereby improving the effect of the protruding components on the two stirring parts on the rolling of the asphalt material.

[0073] A blocking component is disposed on the outer side of the slideway 1.2, and the stirring part is mounted on the blocking component.

[0074] The blocking component is used to block the slideway 1.2 to prevent the asphalt material from flowing out of the slideway 1.2 when the stirring part slides in the slideway 1.2, thereby improving the safety of the device during use.

[0075] As a further improved technical solution of the present invention, see Figure 2 :

[0076] A plurality of heating columns 1.4 are installed on the semi-pass box 1.1.

[0077] The two power terminals of the heating column 1.4 are connected to the positive and negative electrodes of the power supply respectively, so that the heating column 1.4 can heat the outer side of the semi-through box 1.1, thereby facilitating the asphalt material in the sliding channel to become soft at high temperature and be easy to bond together;

[0078] The design of multiple heating columns 1.4 can improve the efficiency of the device in heating the asphalt material, and at the same time can improve the balanced effect of the device in heating the asphalt material.

[0079] As a further improved technical solution of the present invention, see Figure 3-4 :

[0080] The stirring part includes a sleeve 2.1 and a bore tube 2.2. The sleeve 2.1 is mounted with the bore tube 2.2. The bore tube 2.2 is hollow inside and is provided with a plurality of sliding holes. The sleeve 2.1 slides in the slideway 1.2. The sleeve 2.1 is mounted on the blocking assembly. Two stirring parts are provided. The sleeves 2.1 are movably connected in both slideways 1.2.

[0081] When the sliding sleeve 2.1 slides in the slideway 1.2, it can drive the bore tube 2.2 to move;

[0082] Furthermore, when the sliding sleeve 2.1 slides in the slideway 1.2, it can drive the bore tube 2.2 to rotate around its own axis;

[0083] When the hole cylinder 2.2 is agitated in the sliding channel, the sliding holes on the hole cylinder 2.2 of the asphalt material embryo can be intercepted, so that the air mixed in the asphalt material is discharged from the sliding holes on the hole cylinder 2.2, so that the device can discharge the air between the asphalt materials in the sliding channel;

[0084] In order to improve the effect of the device in exhausting the air between the asphalt materials, an exhaust assembly can be installed at the sliding sleeve 2.1;

[0085] The air extraction component may be a vacuum pump, which is connected to the sliding sleeve 2.1 through a pipeline, and the air in the asphalt material in the sliding channel is sucked out under negative pressure through the vacuum pump.

[0086] As a further improved technical solution of the present invention, see Fig.10 :

[0087] The blocking assembly includes a baffle 7.1, a sliding sleeve 2.1 is hingedly connected to the baffle 7.1, the baffle 7.1 is fitted with the side of the semi-pass box 1.1, and a sliding assembly is provided between the baffle 7.1 and the semi-pass box 1.1 to keep the end of the baffle 7.1 flush with the end of the semi-pass box 1.1.

[0088] The baffle 7.1 is used to prevent the asphalt material from flowing out of the slideway 1.2, thereby improving the use effect of the device;

[0089] The design of the sliding assembly can maintain the flush effect between the baffle 7.1 and the end of the semi-pass box 1.1, so that when the stirring part moves in the sliding channel, the baffle 7.1 presses the asphalt material at the slide 1.2 to maintain the sealing effect of the device.

[0090] As a further improved technical solution of the present invention, see Figure 3 , Figure 5-8 , Fig.12 :

[0091] A retractable extension assembly is installed in the bore tube 2.2, and the extension distance of the extension assembly at the bore tube 2.2 is controlled by a driving assembly.

[0092] A protrusion assembly is installed in the bore tube 2.2;

[0093] The driving assembly can control the distance that the extension assembly extends at the hole cylinder 2.2, so as to adjust the distance between the ends of the two stirring parts, and then facilitate the control device to roll the asphalt material;

[0094] Furthermore, by changing the distance that the extension assembly extends at the hole cylinder 2.2, it is possible to change the particle size limit of the asphalt material interception filtering device, thereby improving the processing performance of the device;

[0095] When the control sleeve 2.1 slides in the slideway 1.2, the extending assembly is continuously started to drive the extending assembly to extend and retract periodically, so that the asphalt materials in the sliding channel can be separated in the initial state, thereby facilitating the full mixing of the various asphalt materials.

[0096] As a further improved technical solution of the present invention, see Figure 3 , Figure 5-8 :

[0097] The extending assembly comprises a stirring column 5.1, a sliding rod 5.2 and a piercing platform 5.3. The sliding rod 5.2 is arranged at one end of the stirring column 5.1, and the piercing platform 5.3 is arranged at the other end of the stirring column 5.1. The sliding rod 5.2 slides in the sliding hole on the bore tube 2.2.

[0098] The design of the thorn platform 5.3 facilitates the asphalt material in the sliding channel to be separated in the initial state;

[0099] The control slide bar 5.2 slides in the slide hole on the bore tube 2.2, so that the distance between the end of the stirring column 5.1 and the slide hole on the bore tube 2.2 can be changed.

[0100] As a further improved technical solution of the present invention, see Figure 4-7 :

[0101] The driving assembly includes a telescopic core 4.1, a frustum 4.2 and a slide groove 4.3. The interior of the sliding sleeve 2.1 is hollow and open at both ends. The telescopic core 4.1 runs through the sliding sleeve 2.1. A plurality of frustums 4.2 are staggeredly installed on the telescopic core 4.1. The plurality of frustums 4.2 are connected end to end. The frustums 4.2 are located in the bore tube 2.2. Each frustum 4.2 is provided with a plurality of slide grooves 4.3. The slide rod 5.2 slides in the slide groove 4.3.

[0102] The side edges of the multiple cones 4.2 are all in contact with the inner wall of the bore tube 2.2. At this time, by changing the position between the telescopic core 4.1 and the end of the sliding sleeve 2.1, the sliding rod 5.2 can slide in the sliding groove 4.3, thereby driving the sliding rod 5.2 to extend and retract at the sliding hole on the bore tube 2.2, thereby realizing the function of changing the distance between the end of the stirring column 5.1 and the sliding hole on the bore tube 2.2.

[0103] As a further improved technical solution of the present invention, see Figure 12-13 :

[0104] The driving assembly also includes a rotating sleeve 2.3, a handle 2.4, a rotation limiting rod 7.3, a connecting arm 7.4 and a hinged ring 7.5. The rotating sleeve 2.3 is installed at one end of the sliding sleeve 2.1 away from the hole tube 2.2, and multiple handles 2.4 are evenly installed on the side of the sliding sleeve 2.1. The limited rotation rod 7.3 is installed on the baffle 7.1, and the connecting arm 7.4 is slidably connected to the rotation limiting rod 7.3. The connecting arm 7.4 is fixedly connected to the hinged ring 7.5. The rotating sleeve 2.3 is hingedly connected in the hinged ring 7.5, and a control handle is hingedly connected to the end of the telescopic core 4.1. A telescopic rod is installed on the connecting arm 7.4, and the movable end of the telescopic rod is fixedly connected to the control handle, and the fixed end of the telescopic rod is fixedly connected to the connecting arm 7.4.

[0105] The telescopic rod is activated to extend and retract, which can drive the control handle to slide relative to the sliding sleeve 2.1, so that the sliding rod 5.2 can be extended and retracted at the sliding hole on the bore tube 2.2;

[0106] The design of the handle 2.4 enables the bore tube 2.2 to rotate about its own axis, thereby improving the processing effect of the device on the asphalt material;

[0107] By adjusting the position of the connecting arm 7.4 on the rotation-limiting rod 7.3, the extension depth of the bore tube 2.2 can be changed.

[0108] As a further improved technical solution of the present invention, see Figure 9-11 :

[0109] The sliding assembly comprises a support seat 3.1, a reduction motor 3.2, a screw rod 3.3, a mobile frame 6.1, a slide 6.2, a horizontal platform 6.3, a slide arm 6.4 and a vertical bar 7.2. The lower parts of the two semi-through boxes 1.1 are fixedly connected through the support seat 3.1. The reduction motor 3.2 is installed on the support seat 3.1. The output shaft of the reduction motor 3.2 is installed with a screw rod 3.3. The other end of the screw rod 3.3 is hingedly connected to the support seat 3.1. The screw rod 3.3 is threadedly connected with a slide 6.2. The slide 6.2 slides on the support seat 3.1. The slide 6.2 is fixedly connected to the mobile frame 6.1. Two horizontal platforms 6.3 are installed on the mobile frame 6.1. The two horizontal platforms 6.3 are both slidably connected with slide arms 6.4. The installation directions of the two slide arms 6.4 are opposite. The slide arms 6.4 are slidably connected with vertical bars 7.2, and the vertical bars 7.2 are fixedly connected to the baffle 7.1.

[0110] Start the reduction motor 3.2 to rotate, so that the screw rod 3.3 can drive the slide 6.2 to slide on the support seat 3.1, so that the slide arm 6.4 drives the vertical bar 7.2 to move, and at this time the slide sleeve 2.1 rotates on the baffle 7.1, and the slide sleeve 2.1 slides in the slideway 1.2;

[0111] The positions of the two sliding arms 6.4 on the two horizontal platforms 6.3 are adjusted, thereby changing the relative position between the two rotating sleeves 2.3, thereby achieving the function of changing the rolling force of the device on the asphalt material.

Claims

1. A process for preparing asphalt, characterized in that: The following steps are involved: S1: First, preheat the flow part in the filter press device so that the asphalt material becomes soft at high temperature when passing through the flow part, so that the asphalt materials are easy to bond with each other; S2: Control the stirring part in the filter press device to fully stir the asphalt material so that the air trapped between the asphalt materials can be discharged; S3: changing the position between the stirring part and the circulation part so that the processing force of the device on the asphalt material can be adjusted; The filter press device comprises a circulation part for providing a circulation space for the asphalt material, and a stirring part movable on the circulation part, the stirring part is provided with a protruding component for separating the asphalt materials bonded together, and the relative position between the stirring part and the circulation part can be changed; The circulation part comprises a semi-pass box (1.1) and a connecting piece (1.3), two semi-pass boxes (1.1) are provided, the two semi-pass boxes (1.1) are symmetrically installed to form a sliding channel, the two semi-pass boxes (1.1) are connected via a plurality of connecting pieces (1.3), the sliding channel is arranged in a serpentine shape, the middle of the serpentine sliding channel is low and the two ends are high, and the two semi-pass boxes (1.1) are connected to the ground via a bracket; The two half-pass boxes (1.1) are respectively provided with slideways (1.2), and the two slideways (1.2) have the same tracks but different positions; The two semi-pass boxes (1.1) are respectively provided with slideways (1.2), and the tracks of the two slideways (1.2) are arranged relative to each other; A blocking component is provided on the outer side of the slideway (1.2), and the stirring part is installed on the blocking component; A plurality of heating columns (1.4) are installed on the semi-pass box (1.1); The stirring part comprises a sliding sleeve (2.1) and a hole cylinder (2.2); the sliding sleeve (2.1) is mounted with the hole cylinder (2.2); the hole cylinder (2.2) is hollow inside and is provided with a plurality of sliding holes; the sliding sleeve (2.1) slides in the slideway (1.2); the sliding sleeve (2.1) is mounted on the blocking component; two stirring parts are provided, and the sliding sleeves (2.1) are movably connected in both slideways (1.2); The blocking assembly comprises a baffle (7.1), a sliding sleeve (2.1) is hingedly connected to the baffle (7.1), the baffle (7.1) is in contact with the side of the semi-pass box (1.1), and a sliding assembly is provided between the baffle (7.1) and the semi-pass box (1.1) to keep the end of the baffle (7.1) flush with the end of the semi-pass box (1.1); A retractable extension component is installed in the bore tube (2.2), and the extension distance of the extension component at the bore tube (2.2) is controlled by a driving component; The extending assembly comprises a stirring column (5.1), a sliding rod (5.2) and a piercing platform (5.3); one end of the stirring column (5.1) is provided with the sliding rod (5.2), the other end of the stirring column (5.1) is provided with the piercing platform (5.3), and the sliding rod (5.2) slides in the sliding hole on the hole cylinder (2.2); The driving assembly comprises a telescopic core (4.1), a frustum (4.2) and a slide groove (4.3); the sliding sleeve (2.1) is hollow inside and open at both ends; the telescopic core (4.1) runs through the sliding sleeve (2.1); a plurality of frustums (4.2) are staggeredly installed on the telescopic core (4.1); the plurality of frustums (4.2) are connected end to end; the frustums (4.2) are located in the bore tube (2.2); each frustum (4.2) is provided with a plurality of slide grooves (4.3); and the slide rod (5.2) slides in the slide groove (4.3); The driving assembly further comprises a rotating sleeve (2.3), a handle (2.4), a rotation limiting rod (7.3), a connecting arm (7.4) and a hinged ring (7.5); the rotating sleeve (2.3) is installed at one end of the sliding sleeve (2.1) away from the bore tube (2.2); a plurality of handles (2.4) are evenly installed on the side of the sliding sleeve (2.1); the rotation limiting rod (7.3) is installed on the baffle (7.1); the connecting arm (7.4) is slidably connected to the rotation limiting rod (7.3); the connecting arm (7.4) is fixedly connected to the hinged ring (7.5); the rotating sleeve (2.3) is hingedly connected in the hinged ring (7.5); the end of the telescopic core (4.1) is hingedly connected to a control handle; the connecting arm (7.4) is installed with a telescopic rod; the movable end of the telescopic rod is fixedly connected to the control handle; and the fixed end of the telescopic rod is fixedly connected to the connecting arm (7.4); The sliding assembly comprises a support seat (3.1), a reduction motor (3.2), a screw rod (3.3), a moving frame (6.1), a slide plate (6.2), a horizontal platform (6.3), a sliding arm (6.4) and a vertical bar (7.2); the lower parts of the two half-through boxes (1.1) are fixedly connected through the support seat (3.1); a reduction motor (3.2) is installed on the support seat (3.1); a screw rod (3.3) is installed on the output shaft of the reduction motor (3.2); the other end of the screw rod (3.3) is hinged to the support seat (3.1) The screw rod (3.3) is connected with a slide plate (6.2) by threaded transmission, the slide plate (6.2) slides on the support seat (3.1), the slide plate (6.2) is fixedly connected to the mobile frame (6.1), two horizontal platforms (6.3) are installed on the mobile frame (6.1), and the two horizontal platforms (6.3) are slidably connected with slide arms (6.4), and the installation directions of the two slide arms (6.4) are opposite. A vertical bar (7.2) is slidably connected in the slide arm (6.4), and the vertical bar (7.2) is fixedly connected to the baffle (7.1).

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