Red mud drying device for aluminum oxide production

Abstract

The utility model discloses a red mud drying device for aluminum oxide production, which relates to the technical field of aluminum oxide, and comprises a frame body and supporting legs, by arranging a vibrating mechanism, a rotating component, a sliding component and a transmission component, a vibrating motor is started to drive a vibrating shaft to rotate, so that a vibrating disc rotates, and a rotating plate rotationally connected with a first rotating shaft is driven to rotate; a rotating frame fixedly connected with a second rotating shaft moves to drive a sliding rack to slide in a sliding groove in a sliding block, so that a transmission gear meshed with the sliding rack rotates, a transmission shaft fixedly connected with the transmission gear is driven to rotate, and a transmission block fixedly connected with the transmission shaft rotates; according to the red mud crushing and drying device, red mud during crushing and drying is vibrated, heat dissipation of the dried red mud is achieved by arranging a reciprocating mechanism, a connecting component and a moving component, drying of the red mud is more thorough by arranging a vibrating mechanism and the reciprocating mechanism, and the drying efficiency of the red mud is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of alumina, especially relates to a red mud drying device for alumina production. BACKGROUND

[0002] The red mud drying device for alumina production mainly comprises a rotary drum red mud dryer and a rotary flash drying machine. The rotary drum red mud dryer is a device specially used for drying red mud and is widely used in the metallurgical, chemical, building material and other industries. Its working principle is to uniformly send the red mud into the rotating drum through the feeding device, and multiple scoops are arranged inside the drum to continuously scoop up and scatter the red mud, so that the red mud is fully contacted with the hot air and exchanges heat. The rotation of the drum forms a certain material curtain in the drum, which enhances the penetration and heat transfer effect of the hot air. After a certain period of drying, the water content of the red mud is greatly reduced and can be discharged through the discharge device. The advantages of the rotary drum red mud dryer include high drying efficiency, low energy consumption, simple operation and convenient maintenance. The rotary flash drying machine is a new type of drying equipment suitable for efficient drying of red mud. Its working principle is to realize efficient drying through rapid heat exchange between high-temperature gas and wet red mud in the drying tower. This equipment has the characteristics of compact structure, wide application range, large production capacity and high efficiency.

[0003] According to the search of the announcement number "CN219318828U", a red mud drying device for alumina production is disclosed. The device is used to feed the red mud into the drying machine body through the feeding frame. The rotation of the rotating motor drives the rotation of gear one, which in turn drives the rotation of gear two and gear three. The rotation of gear two and gear three drives the counter-rotation of the crushing rollers one and two. The rotation of the crushing rollers one and two crushes the lumped red mud, which facilitates the uniform drying of the red mud in the later stage and avoids the problem that the internal part of the red mud cannot reach the drying standard while the external part is fully dried. The efficiency and drying result of the red mud drying are guaranteed.

[0004] Although the patent can crush the red mud before drying and improve the drying efficiency of the red mud, the water inside the red mud will be quickly evaporated during the drying process after the red mud is crushed, which will cause the surface of the red mud to harden quickly. This will slow down the heat conduction inside the red mud, affecting the drying of the red mud inside. In addition, after the red mud is dried, a large amount of heat is stored inside the red mud, which makes it difficult to transport the red mud. Therefore, improvement is needed. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a red mud drying device for alumina production to solve the above technical problems.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] An alumina production is with red mud drying device, including frame body and support leg, support leg and frame body fixed connection, still include:

[0008] Driving motor, set up on the frame body, with frame body fixed connection;

[0009] Driving shaft, with the driving motor output end detachable fixed connection, and with the frame body rotation is connected;

[0010] First drive wheel, with the driving shaft fixed connection;

[0011] Driving rod, with the frame body fixed connection;

[0012] Second drive wheel, with the driving rod rotation is connected;

[0013] Driving belt, with the first drive wheel pulley cooperation rotation, and with the second drive wheel pulley cooperation rotation;

[0014] Support frame, set up on the frame body, with frame body fixed connection;

[0015] Heating pipe, have a plurality of, and a plurality of heating pipes evenly set up on the support frame, with support frame detachable fixed connection;

[0016] Feed frame, set up on the support frame, with support frame fixed connection;

[0017] Stirring motor, set up on the feed frame, with feed frame fixed connection;

[0018] Stirring shaft, with the stirring motor output end detachable fixed connection;

[0019] Stirring vane, have a plurality of, and a plurality of stirring vane evenly set up on the stirring shaft, with stirring shaft fixed connection;

[0020] Collecting frame, with the frame body fixed connection;

[0021] Fan, with the collecting frame fixed connection;

[0022] Ventilation opening, set up on the collecting frame;

[0023] Vibration mechanism, set up on the frame body, for the red mud after stirring and crushing vibration;

[0024] Reciprocating mechanism, set up on the collecting frame, for the red mud after drying heat dissipation.

[0025] Preferably, the vibration mechanism includes:

[0026] vibration frame, disposed on the frame body and fixedly connected with the frame body;

[0027] motor frame, fixedly connected with the vibration frame;

[0028] vibration motor, fixedly connected with the motor frame;

[0029] vibration shaft, detachably fixedly connected with an output end of the vibration motor;

[0030] vibration disc, fixedly connected with the vibration shaft;

[0031] rotating part, disposed on the vibration disc.

[0032] Preferably, the rotating part comprises:

[0033] first rotating shaft, eccentrically disposed on the vibration disc and fixedly connected with the vibration disc;

[0034] rotating plate, rotationally connected with the first rotating shaft;

[0035] second rotating shaft, rotationally connected with the rotating plate;

[0036] rotating frame, fixedly connected with the second rotating shaft;

[0037] sliding part, disposed on the frame body.

[0038] Preferably, the sliding part comprises:

[0039] sliding block, disposed on the frame body and fixedly connected with the frame body;

[0040] sliding groove, formed on the sliding block;

[0041] sliding rack, slidingly connected with the sliding groove and fixedly connected with the rotating frame;

[0042] transmission part, disposed on the frame body.

[0043] Preferably, the transmission part comprises:

[0044] transmission shaft, disposed on the frame body and fixedly connected with the frame body;

[0045] transmission gear, fixedly connected with the transmission shaft and engaged with the sliding rack;

[0046] transmission blocks, a plurality of which are evenly disposed on the transmission shaft and fixedly connected with the transmission shaft.

[0047] Preferably, the reciprocating mechanism comprises:

[0048] Reciprocating frame, disposed on the collection frame, fixedly connected with the collection frame;

[0049] Reciprocating motor, fixedly connected with the reciprocating frame;

[0050] Reciprocating shaft, detachably fixedly connected with the output end of the reciprocating motor;

[0051] Reciprocating disc, fixedly connected with the reciprocating shaft;

[0052] Connecting component, disposed on the reciprocating disc.

[0053] Preferably, the connecting component comprises:

[0054] Connecting shaft, eccentrically disposed on the reciprocating disc, fixedly connected with the reciprocating disc;

[0055] Connecting frame, slidingly connected with the connecting shaft;

[0056] Connecting block, fixedly connected with the connecting frame;

[0057] First moving block, slidingly connected with the connecting block;

[0058] Moving component, disposed on the collection frame.

[0059] Preferably, the moving component comprises:

[0060] Moving strip, disposed on the collection frame, fixedly connected with the collection frame;

[0061] Rectangular block, slidingly connected with the moving strip;

[0062] Second moving block, slidingly connected with the rectangular block;

[0063] Moving frame, fixedly connected with the first moving block and the second moving block.

[0064] As described above, due to the adoption of the above technical solutions, the present application has the following advantages:

[0065] By setting the vibration mechanism, rotating component, sliding component and transmission component, the red mud during crushing and drying is vibrated, by setting the reciprocating mechanism, connecting component and moving component, the red mud after drying is cooled, by setting the vibration mechanism and reciprocating mechanism, the drying of the red mud is more thorough, and the drying efficiency of the red mud is improved. BRIEF DESCRIPTION OF DRAWINGS

[0066] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0067] Figure 1 A perspective structural schematic diagram of the red mud drying device for alumina production is shown.

[0068] Figure 2 A top view structural schematic diagram of the red mud drying device for alumina production is shown.

[0069] Figure 3 A cross-sectional structural schematic diagram of A-A in the red mud drying device for alumina production is shown. Figure 2

[0070] Figure 4 A reciprocating mechanism explosion view of the red mud drying device for alumina production is shown.

[0071] Figure 5 A vibration mechanism explosion view of the red mud drying device for alumina production is shown.

[0072] Legend:

[0073] 1, frame; 2, support leg; 3, drive motor; 4, drive shaft; 5, first drive wheel; 6, drive rod; 7, second drive wheel; 8, drive belt; 9, support frame; 10, heating pipe; 11, feeding frame; 12, stirring motor; 13, stirring shaft; 14, stirring blade; 15, collection frame; 16, fan; 17, ventilation opening; 18, vibration frame; 19, motor frame; 20, vibration motor; 21, vibration shaft; 22, vibration disc; 23, first rotating shaft; 24, rotating plate; 25, second rotating shaft; 26, rotating frame; 27, sliding block; 28, sliding groove; 29, sliding rack; 30, transmission shaft; 31, transmission gear; 32, transmission block; 33, reciprocating frame; 34, reciprocating motor; 35, reciprocating shaft; 36, reciprocating disc; 37, connecting shaft; 38, connecting frame; 39, connecting block; 40, first moving block; 41, moving bar; 42, rectangular block; 43, second moving block; 44, moving frame. DETAILED DESCRIPTION

[0074] ​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0075] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0076] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and the like used in this document are for illustrative purposes only.

[0077] In addition, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0078] Referring to Figures 1 to 5 Further description is made to the embodiment of the red mud drying device for alumina production of the present application.

[0079] The application discloses a bauxite production red mud drying device, which comprises a frame body 1 and supporting legs 2, the supporting legs 2 are fixedly connected with the frame body 1, a driving motor 3 is arranged on the frame body 1 and fixedly connected with the frame body 1, a driving shaft 4 is detachably fixedly connected with an output end of the driving motor 3 and rotationally connected with the frame body 1, a first driving wheel 5 is fixedly connected with the driving shaft 4, a driving rod 6 is fixedly connected with the frame body 1, a second driving wheel 7 is rotationally connected with the driving rod 6, a driving belt 8 is rotationally matched with the first driving wheel 5 and the second driving wheel 7, a supporting frame 9 is arranged on the frame body 1 and fixedly connected with the frame body 1, a plurality of heating pipes 10 are arranged on the supporting frame 9 in a uniform manner and detachably fixedly connected with the supporting frame 9, a feeding frame 11 is arranged on the supporting frame 9 and fixedly connected with the supporting frame 9, a stirring motor 12 is arranged on the feeding frame 11 and fixedly connected with the feeding frame 11, a stirring shaft 13 is detachably fixedly connected with an output end of the stirring motor 12, a plurality of stirring blades 14 are arranged on the stirring shaft 13 in a uniform manner and fixedly connected with the stirring shaft 13, a collecting frame 15 is fixedly connected with the frame body 1, a fan 16 is fixedly connected with the collecting frame 15, a ventilation opening 17 is formed in the collecting frame 15, a vibrating mechanism is arranged on the frame body 1 and used for vibrating the red mud after being stirred and crushed, and a reciprocating mechanism is arranged on the collecting frame 15 and used for heat dissipation of the red mud after being dried.

[0080] With reference to Figure 5 , as a preferred embodiment, the vibrating mechanism comprises a vibrating frame 18 arranged on the frame body 1 and fixedly connected with the frame body 1, a motor frame 19 fixedly connected with the vibrating frame 18, a vibrating motor 20 fixedly connected with the motor frame 19, a vibrating shaft 21 detachably fixedly connected with an output end of the vibrating motor 20, a vibrating disc 22 fixedly connected with the vibrating shaft 21, and a rotating component arranged on the vibrating disc 22.

[0081] In this way, when the vibrating motor 20 operates, the vibrating shaft 21 detachably fixedly connected with the output end of the vibrating motor 20 is driven to rotate, the vibrating disc 22 fixedly connected with the vibrating shaft 21 is driven to rotate, and power is provided for the rotating component to operate.

[0082] With reference to Figure 5 , as a preferred embodiment, the rotating component comprises a first rotating shaft 23 eccentrically arranged on the vibrating disc 22 and fixedly connected with the vibrating disc 22, a rotating plate 24 rotationally connected with the first rotating shaft 23, a second rotating shaft 25 rotationally connected with the rotating plate 24, a rotating frame 26 fixedly connected with the second rotating shaft 25, and a sliding component arranged on the frame body 1.

[0083] The rotation plate 24 connected with the first rotation shaft 23 rotates, the rotation frame 26 connected with the second rotation shaft 25 moves, and the sliding component operates.

[0084] With reference to Figure 5 , as a preferred embodiment, the sliding component comprises a sliding block 27 arranged on the frame 1 and fixedly connected with the frame 1, a sliding groove 28 arranged on the sliding block 27, a sliding rack 29 slidably connected with the sliding groove 28 and fixedly connected with the rotation frame 26, and a transmission component arranged on the frame 1.

[0085] The sliding rack 29 slides in the sliding groove 28 of the sliding block 27, and the transmission component operates.

[0086] With reference to Figure 5 , as a preferred embodiment, the transmission component comprises a transmission shaft 30 arranged on the frame 1 and fixedly connected with the frame 1, a transmission gear 31 fixedly connected with the transmission shaft 30 and engaged with the sliding rack 29, and a plurality of transmission blocks 32 arranged on the transmission shaft 30 and fixedly connected with the transmission shaft 30.

[0087] The transmission gear 31 engaged with the sliding rack 29 rotates, the transmission shaft 30 fixedly connected with the transmission gear 31 rotates, the transmission blocks 32 fixedly connected with the transmission shaft 30 rotate, the protrusions on the transmission blocks 32 pass through the drive belt 8 quickly, the drive belt 8 vibrates, and the crushed red mud vibrates.

[0088] With reference to Figure 4 , as a preferred embodiment, the reciprocating mechanism comprises a reciprocating frame 33 arranged on the collection frame 15 and fixedly connected with the collection frame 15, a reciprocating motor 34 fixedly connected with the reciprocating frame 33, a reciprocating shaft 35 detachably fixedly connected with the output end of the reciprocating motor 34, a reciprocating disc 36 fixedly connected with the reciprocating shaft 35, and a connecting component arranged on the reciprocating disc 36.

[0089] The reciprocating motor 34 rotates the reciprocating shaft 35 detachably fixedly connected with the output end of the reciprocating motor 34, the reciprocating disc 36 fixedly connected with the reciprocating shaft 35 rotates, and the connecting component operates.

[0090] With reference to Figure 4 , as a preferred embodiment, the connecting component comprises a connecting shaft 37 eccentrically arranged on the reciprocating disc 36 and fixedly connected with the reciprocating disc 36, a connecting frame 38 slidably connected with the connecting shaft 37, a connecting block 39 fixedly connected with the connecting frame 38, a first moving block 40 slidably connected with the connecting block 39, and a moving component arranged on the collection frame 15.

[0091] In this way, the connecting frame 38 connected with the connecting shaft 37 slides, the connecting block 39 connected with the connecting frame 38 moves, and the moving component operates.

[0092] With reference to Figure 4 As a preferred embodiment, the moving component comprises a moving strip 41 arranged on the collecting frame 15 and fixedly connected with the collecting frame 15, a rectangular block 42 slidably connected with the moving strip 41, a second moving block 43 slidably connected with the rectangular block 42, and a moving frame 44 fixedly connected with the first moving block 40 and the second moving block 43.

[0093] In this way, the moving frame 44 fixedly connected with the first moving block 40 drives the rectangular block 42 fixedly connected with the second moving block 43 to slide on the moving strip 41, so that the red mud slides in the collecting frame 15, and at this time, the fan 16 fixedly connected with the collecting frame 15 is turned on, thereby achieving heat dissipation of the red mud.

[0094] Working principle: in use, first, the stirring motor 12 is started to drive the stirring shaft 13 fixedly connected with the output end of the stirring motor 12 to rotate, so that the stirring blade 14 fixedly connected with the stirring shaft 13 rotates, then the red mud is put into the feeding frame 11 for crushing, then the driving motor 3 is started to drive the driving shaft 4 fixedly connected with the output end of the driving motor 3 to rotate, so that the first driving wheel 5 fixedly connected with the driving shaft 4 rotates, the driving belt 8 rotates to drive the second driving wheel 7 to rotate on the driving rod 6, thereby transmitting the crushed red mud, at the same time, the heating pipe 10 is turned on, and the vibration motor 20 is turned on to drive the vibration shaft 21 fixedly connected with the output end of the vibration motor 20 to rotate, so that the vibration disc 22 fixedly connected with the vibration shaft 21 rotates, thereby driving the rotating plate 24 connected with the first rotating shaft 23 to rotate, so that the rotating frame 26 fixedly connected with the second rotating shaft 25 moves to drive the sliding rack 29 to slide in the sliding groove 28 on the sliding block 27, so that the transmission gear 31 engaged with the sliding rack 29 rotates, thereby driving the transmission shaft 30 fixedly connected with the transmission gear 31 to rotate, so that the transmission block 32 fixedly connected with the transmission shaft 30 rotates, the transmission block 32 is provided with a protrusion, the protrusion rapidly passes through the driving belt 8, so that the driving belt 8 vibrates, thereby vibrating the crushed red mud.

[0095] When the red mud is dried, it falls into the moving frame 44, the reciprocating motor 34 is started, the reciprocating shaft 35 fixedly connected with the output end of the reciprocating motor 34 is driven to rotate, the reciprocating disc 36 fixedly connected with the reciprocating shaft 35 is driven to rotate, the connecting frame 38 slidingly connected with the connecting shaft 37 is driven to move, the connecting block 39 fixedly connected with the connecting frame 38 is driven to move, the moving frame 44 fixedly connected with the first moving block 40 drives the rectangular block 42 fixedly connected with the second moving block 43 to slide on the moving strip 41, so that the red mud in the collecting frame 15 slides, at this time, the fan 16 fixedly connected with the collecting frame 15 is opened, thereby realizing heat dissipation of the red mud.

[0096] The above description of the embodiments enables those skilled in the art to make or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A red mud drying device for alumina production, comprising a frame (1) and supporting legs (2), wherein the supporting legs (2) and the frame (1) are fixedly connected; characterized in that, Also includes: A drive motor (3) is mounted on the frame (1) and is fixedly connected to the frame (1); The drive shaft (4) is detachably and fixedly connected to the output end of the drive motor (3), and is rotatably connected to the frame (1); The first drive wheel (5) is fixedly connected to the drive shaft (4); The drive rod (6) is fixedly connected to the frame (1); The second drive wheel (7) is rotatably connected to the drive rod (6); The drive belt (8) rotates in conjunction with the first drive wheel (5) pulley and also rotates in conjunction with the second drive wheel (7) pulley; A support frame (9) is disposed on the frame (1) and fixedly connected to the frame (1); There are multiple heating tubes (10), and the multiple heating tubes (10) are evenly arranged on the support frame (9) and are detachably fixedly connected to the support frame (9); The feed frame (11) is set on the support frame (9) and is fixedly connected to the support frame (9); A stirring motor (12) is mounted on the feed frame (11) and is fixedly connected to the feed frame (11); The stirring shaft (13) is detachably and fixedly connected to the output end of the stirring motor (12); The stirring blades (14) are multiple, and the multiple stirring blades (14) are evenly arranged on the stirring shaft (13) and fixedly connected to the stirring shaft (13); The collection frame (15) is fixedly connected to the frame body (1); The fan (16) is fixedly connected to the collection box (15); Ventilation opening (17) is provided on the collection frame (15); A vibration mechanism is installed on the frame (1) and is used to vibrate the red mud after it has been stirred and crushed. A reciprocating mechanism is provided on the collection frame (15) for dissipating heat from the dried red mud.

2. The red mud drying device for alumina production according to claim 1, characterized in that, The vibration mechanism includes: A vibration frame (18) is disposed on the frame (1) and fixedly connected to the frame (1); The motor frame (19) is fixedly connected to the vibration frame (18); A vibration motor (20) is fixedly connected to the motor frame (19); The vibration shaft (21) is detachably and fixedly connected to the output end of the vibration motor (20); The vibratory plate (22) is fixedly connected to the vibratory shaft (21); The rotating component is mounted on the vibratory plate (22).

3. The red mud drying device for alumina production according to claim 2, characterized in that, The rotating component includes: The first rotating shaft (23) is eccentrically mounted on the vibratory plate (22) and fixedly connected to the vibratory plate (22); The rotating plate (24) is rotatably connected to the first rotating shaft (23); The second rotating shaft (25) is rotatably connected to the rotating plate (24); The rotating frame (26) is fixedly connected to the second rotating shaft (25); A sliding component is disposed on the frame (1).

4. The red mud drying device for alumina production according to claim 3, characterized in that, The sliding component includes: A sliding block (27) is disposed on the frame (1) and fixedly connected to the frame (1); A sliding groove (28) is formed on the sliding block (27); The sliding rack (29) is slidably connected to the sliding groove (28) and fixedly connected to the rotating frame (26); The transmission component is disposed on the frame (1).

5. The red mud drying device for alumina production according to claim 4, characterized in that, The transmission component includes: A drive shaft (30) is mounted on the frame (1) and is fixedly connected to the frame (1); The transmission gear (31) is fixedly connected to the transmission shaft (30) and meshes with the sliding rack (29); The transmission block (32) has multiple blocks, and the multiple transmission blocks (32) are evenly arranged on the transmission shaft (30) and fixedly connected to the transmission shaft (30).

6. The red mud drying device for alumina production according to claim 5, characterized in that, The reciprocating mechanism includes: A reciprocating frame (33) is disposed on the collection frame (15) and is fixedly connected to the collection frame (15); A reciprocating motor (34) is fixedly connected to the reciprocating frame (33); The reciprocating shaft (35) is detachably and fixedly connected to the output end of the reciprocating motor (34); The reciprocating disc (36) is fixedly connected to the reciprocating shaft (35); The connecting component is disposed on the reciprocating disk (36).

7. A red mud drying device for alumina production according to claim 6, characterized in that, The connecting component includes: The connecting shaft (37) is eccentrically mounted on the reciprocating disk (36) and is fixedly connected to the reciprocating disk (36); The connecting frame (38) is slidably connected to the connecting shaft (37); The connecting block (39) is fixedly connected to the connecting frame (38); The first moving block (40) is slidably connected to the connecting block (39); A movable component is disposed on the collection frame (15).

8. The red mud drying device for alumina production according to claim 7, characterized in that, The movable component includes: A movable bar (41) is disposed on the collection frame (15) and fixedly connected to the collection frame (15); A rectangular block (42) is slidably connected to the moving bar (41); The second movable block (43) is slidably connected to the rectangular block (42); The movable frame (44) is fixedly connected to the first movable block (40) and to the second movable block (43).

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