Rapid drying device for oil pressing raw materials

Abstract

The utility model relates to an oil pressing raw material fast drying device which comprises a frame structure, a drying structure for drying raw materials, a heating structure for heating air, a heat dissipation structure for dissipating evaporated hot air and a double-port feeding structure are installed on the frame structure, and multiple layers of distributed fast drying assemblies are arranged in the drying structure. The rapid drying assembly comprises a drying tank installed on the frame structure, a third servo motor is installed on the lower end face of the drying tank, the output end of the third servo motor is connected with a coupler, one end of the coupler is connected with a third rotating shaft, and the other end of the coupler is connected with a second rotating shaft. The interior of the third rotating shaft is a cavity, the upper end of the third rotating shaft is expanded, a first sealing bearing is fixedly installed in the expanded part, and an inner ring of the first sealing bearing is connected with the heating structure. The drying device solves the problem that an existing drying device cannot quickly and effectively dry moisture on the surfaces of raw materials.

Description

Technical Field

[0001] The utility model relates to the technical field of drying devices, in particular to a rapid drying device for oil extraction raw materials. Background Technique

[0002] For the raw materials for oil extraction, after cleaning, they need to be dried to evaporate the moisture on the surface of the raw materials. Generally, drying devices blow hot air on the surface of the raw materials to make the moisture evaporate. However, the existing drying devices cannot achieve the effect of rapid drying, so the drying time is relatively long.

[0003] In order to solve the above problems, Chinese Patent CN216814899U, a cleaning and drying integrated device for oil extraction raw materials, points out that by pushing the plug plate inward, the hot air blower works to blow out hot air, and the hot air enters the inside of the cleaning box through the collection box and the second pipeline to heat and dry the wet oil extraction raw materials inside the cleaning box, and the inside of the collection box is also dried together. According to the drawings of this patent, by rotating the first rotating rod, the stirring paddle drives the raw materials in the cleaning box to stir, so as to spread the raw materials and increase the contact area with the air, and then dry through the entry of hot air. Although this method can improve the drying efficiency to a certain extent, there are still certain problems. Although the stirring paddle can drive the stirring of the raw materials, the contact area with the air is still not sufficient. And when the raw materials on the top layer evaporate during drying and are then directly covered by the raw materials on the lower layer, the evaporation is incomplete, and thus the moisture on the surface of the raw materials cannot be dried more quickly.

[0004] Therefore, in order to improve the drying efficiency and enable the moisture on the surface of the raw materials to be quickly dried, a rapid drying device for oil extraction raw materials is hereby proposed. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a rapid drying device for oil extraction raw materials, which solves the problem that the existing drying devices cannot quickly and effectively dry the moisture on the surface of the raw materials.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A rapid drying device for oil extraction raw materials, including a frame structure, on which a drying structure for drying raw materials, a heating structure for heating air, a heat dissipation structure for dissipating heat of the evaporated hot air, and a double-port feeding structure are installed. A multi-layer decentralized rapid drying component is arranged in the drying structure, and adjacent two layers are connected to the heat dissipation structure. The heating structure is connected to the drying structure. The rapid drying component includes a drying tank installed on the frame structure. A third servo motor is installed on the lower end surface of the drying tank. The output end of the third servo motor is connected to a coupling. One end of the coupling is connected to a third rotating shaft. The interior of the third rotating shaft is a cavity. The upper end of the third rotating shaft is enlarged. A first sealing bearing is fixedly installed in the enlarged part. The inner ring of the first sealing bearing is connected to the heating structure. A net plate is installed on the inner wall of the drying tank from top to bottom. An air outlet pipe is connected to the surface of the third rotating shaft between adjacent two groups of net plates. The interior of the air outlet pipe is a cavity and through holes are provided on the surface of the air outlet pipe. The air outlet pipe is communicated with the cavity in the third rotating shaft.

[0007] Through the above technical solutions, further, a blanking pipe is opened at the lower end of the drying tank, and a scraper is installed on the surface of the third rotating shaft near the bottom of the drying tank. And a scraper is provided on the surface of the third rotating shaft above the topmost net plate and is in contact with the upper surface of the net plate. A second sealing bearing is provided at the connection between the net plate and the third rotating shaft.

[0008] Further, the heat dissipation structure includes an air extraction pipe connected to the outer surface of the drying tank. The installation position of the air extraction pipe is between adjacent two groups of net plates. An air extraction box installed on the frame structure. Three fans are provided on the front end surface of the air extraction box. The air extraction pipe is inserted into the air extraction box.

[0009] As a preferred technical solution, the heating structure includes a heating box installed on the frame structure. Air blowers are symmetrically installed at the upper end of the heating box. A hot air inlet pipe is provided on the side surface of the heating box. The hot air inlet pipe is fixedly connected to the inner ring of the first sealing bearing.

[0010] Further, a movable structure is also provided on the outer surface of the drying tank. The movable structure includes a guide rail installed on the frame structure. The drying tank is installed at the upper end of the guide rail. An electric push rod is also installed on the frame structure. The telescopic end of the electric push rod is connected to the surface of the drying tank.

[0011] As a preferred technical solution, a clamping body is also installed on the frame structure. The hot air inlet pipe passes through the clamping body.

[0012] Furthermore, support bodies are symmetrically installed on the upper end face of the frame structure. A double-port feeding structure is connected to the upper end face of the support body. The double-port feeding structure is composed of a conveying structure and a blanking structure for preventing material blockage. The conveying structure includes a spiral feeding cylinder installed on the upper end of the support body. A blanking structure is installed at the upper end of the spiral feeding cylinder. A feeding funnel is provided at the upper end of the blanking structure. Discharge ports are symmetrically provided on the surface of the spiral feeding cylinder. The discharge ports correspond to the ports of the drying tank. A first servo motor is installed at the right end of the spiral feeding cylinder. The output end of the first servo motor is connected to a first rotating shaft. A first spiral plate and a second spiral plate are provided on the surface of the first rotating shaft. The first spiral plate and the second spiral plate have opposite rotation directions.

[0013] As a preferred technical solution, the blanking structure includes a feeding box installed at the upper end of the spiral feeding cylinder. A feeding funnel is installed at the upper end of the feeding box. A side box is installed on the left side of the feeding box. An installation frame is installed at the right side of the feeding box. A second servo motor is installed on the installation frame. The output end of the second servo motor is connected to a second rotating shaft. A baffle is installed on the surface of the second rotating shaft inside the feeding box.

[0014] Furthermore, bearing seats are installed on the inner side face of the side box and the upper end face of the installation frame. The second rotating shaft passes through the inner ring of the bearing seat.

[0015] As a preferred technical solution, the frame structure includes multiple groups of frames. A stabilizing rod and an installation rod are connected between the multiple groups of frames. A main load-bearing rod is also connected in the middle of the frame. A guide rail is installed on the upper end face of the main load-bearing rod. An air extraction box is installed on the upper end face of the installation rod. A heating box is installed on the upper end face of the main load-bearing rod. The inner side face of the frame located on the upper end face of the main load-bearing rod is connected with a shorter connecting rod. An electric push rod is installed on the connecting rod.

[0016] Compared with the prior art, the present utility model provides a rapid drying device for oil extraction raw materials, having the following beneficial effects:

[0017] 1. In this device, when the raw materials enter the drying tank through the feeding structure, the hydraulic cylinder drives the drying tank to move back and forth continuously. The raw materials fall onto the mesh plate. With the shaking of the drying tank and the rotation of the third rotating shaft driven by the third servo motor, the scraper rotates, thereby scraping the raw materials on the uppermost mesh plate. When the raw materials fall onto the middle mesh plate, the hot air blown in through the air outlet pipe enables the moisture of the raw materials to be fully volatilized during the falling process. The raw materials have a high degree of bulkiness during the falling process and are not prone to condensation, which can increase the contact area with the air. Therefore, it is beneficial to dry the raw materials. And the evaporated water vapor is quickly extracted through the air extraction pipe, thus preventing the water vapor from adhering to other raw materials again. Therefore, the problem that the existing drying device cannot quickly and effectively dry the moisture on the surface of the raw materials is solved through the above settings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a rapid drying device for oil extraction raw materials of the present utility model;

[0019] Figure 2 is a right - view structural diagram of a rapid drying device for oil extraction raw materials of the present utility model;

[0020] Figure 3 is a sectional structural diagram of a drying tank of a rapid drying device for oil extraction raw materials of the present utility model;

[0021] Figure 4 is a schematic structural diagram of a feeding structure of a rapid drying device for oil extraction raw materials of the present utility model;

[0022] Figure 5 is a sectional schematic diagram of a feeding structure of a rapid drying device for oil extraction raw materials of the present utility model;

[0023] Figure 6 is a rapid drying device for oil extraction raw materials of the present utility model Figure 2 partial enlarged structural diagram at position A;

[0024] Figure 7 is a rapid drying device for oil extraction raw materials of the present utility model Figure 3 partial enlarged structural diagram at position B;

[0025] Figure 8 is a rapid drying device for oil extraction raw materials of the present utility model Figure 1 partial enlarged structural diagram at position C;

[0026] Figure 9 is a rapid drying device for oil extraction raw materials of the present utility model Figure 5 partial enlarged structural diagram at position D;

[0027] Figure 10 is a schematic structural diagram of a support - installable body and a clamping body of a rapid drying device for oil extraction raw materials of the present utility model.

[0028] In the figure: 1, frame body; 2, stabilizing rod; 3, mounting rod; 4, air extraction box; 5, supportable installation body; 6, double-port feeding structure; 601, spiral feeding cylinder; 602, feeding box; 603, feeding funnel; 604, first servo motor; 605, discharge port; 606, first rotating shaft; 607, first spiral plate; 608, second spiral plate; 609, side box; 610, mounting frame; 611, second servo motor; 612, second rotating shaft; 613, baffle; 614, bearing seat; 7, main load-bearing rod; 8, guide rail; 9, drying tank; 10, third servo motor; 11, third rotating shaft; 12, air extraction pipe; 13, first sealing bearing; 14, scraper; 15, mesh plate; 16, second sealing bearing; 17, air outlet pipe; 18, clamping body; 19, heating box; 20, fan; 21, electric push rod; 22, hot air inlet pipe. Detailed implementation manner

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment

[0031] Please refer to Figures 1 - 10 , the present invention provides the following technical solutions: A rapid drying device for oil extraction raw materials, including a frame structure, on which a drying structure for drying raw materials, a heating structure for heating air, a heat dissipation structure for dissipating the evaporated hot air, and a double-port feeding structure 6 are installed. A multi-layer distributed rapid drying component is arranged in the drying structure, and adjacent two layers are connected to the heat dissipation structure. The heating structure is connected to the drying structure. The rapid drying component includes a drying tank 9 installed on the frame structure. A third servo motor 10 is installed on the lower end surface of the drying tank 9. The output end of the third servo motor 10 is connected to a coupling, and one end of the coupling is connected to a third rotating shaft 11. The interior of the third rotating shaft 11 is a cavity, and the upper end of the third rotating shaft 11 is enlarged. A first sealing bearing 13 is fixedly installed in the enlarged part. The inner ring of the first sealing bearing 13 is connected to the heating structure. A mesh plate 15 is installed on the inner wall of the drying tank 9 from top to bottom. An air outlet pipe 17 is connected to the surface of the third rotating shaft 11 between two adjacent groups of mesh plates 15. The interior of the air outlet pipe 17 is a cavity and through holes are provided on the surface of the air outlet pipe 17. The air outlet pipe 17 is communicated with the cavity in the third rotating shaft 11.

[0032] In this implementation scheme, the specific working principle is as follows: Raw materials are poured into the drying structure through the feeding structure, and then the air is heated by the heating structure to dry the raw materials in the drying structure. In order to improve the drying speed and efficiency, the third servo motor 10 drives the third rotating shaft 11 to rotate. At this time, the mesh plate 15 does not rotate, and the raw materials are poured onto the topmost mesh plate 15. And in order to facilitate the falling of the raw materials, the raw materials on the mesh plate 15 are scraped by the scraper 14, so that the raw materials fall from the holes. Then, during the falling process, due to the action of the air outlet pipe 17, the hot air in the heating structure is blown out from the pupils on the surface of the air outlet pipe 17, so that the moisture on the surface of the raw materials evaporates quickly. During the falling process, the raw materials are highly bulked and are not easy to condense. This can increase the size of the contact surface with the air, so it is beneficial to dry the raw materials. And the evaporated water vapor is quickly extracted through the air extraction pipe 12, so as to prevent the water vapor from adsorbing on other raw materials again. Thus, through the above settings, the problem that the existing drying device cannot quickly and effectively dry the moisture on the surface of the raw materials is solved.

[0033] According to the above, in order to accelerate the falling of the raw materials from the surface of the mesh plate 15, please refer specifically to Figure 7 It can be seen that a blanking pipe is provided at the lower end of the drying tank 9, and a scraper 14 is installed on the surface of the third rotating shaft 11 near the bottom of the drying tank 9. And a scraper 14 is provided on the surface of the third rotating shaft 11 above the topmost mesh plate 15 and is in contact with the upper surface of the mesh plate 15. A second sealing bearing 16 is provided at the connection between the mesh plate 15 and the third rotating shaft 11. It should also be noted that both the upper surface and the lower surface of the air outlet pipe 17 are in contact with the surface of the mesh plate 15, and the through holes on the surface of the mesh plate 15 are arranged in a circular array. Therefore, the surface of the mesh plate can be dried.

[0034] According to the foregoing, in order to prevent the problem that the dried surface of the raw materials is not fully dried when falling from the mesh plate 15 due to the water vapor adhering to the surface of the raw materials after evaporation, please refer specifically to Figure 1 And Figure 3 It can be seen that the heat dissipation structure includes an air extraction pipe 12 connected to the outer surface of the drying tank 9. The installation position of the air extraction pipe 12 is between two adjacent groups of mesh plates 15. An air extraction box 4 installed on the frame structure, and three fans are provided on the front end face of the air extraction box 4. The air extraction pipe 12 is inserted into the air extraction box 4.

[0035] For the heating structure, please refer specifically to Figure 1 And Figure 8It can be seen that the heating structure includes a heating box 19 installed on the frame structure. Blowers 20 are symmetrically installed at the upper end of the heating box 19. A hot air inlet pipe 22 is provided on the side of the heating box 19. The hot air inlet pipe 22 is fixedly connected to the inner ring of the first sealing bearing 13. Thus, when the third rotating shaft 11 rotates, it will not drive the inlet pipe 22 to rotate, and the first sealing bearing 13 can prevent the dissipation of hot air while ensuring the rotation condition.

[0036] In order to ensure that the raw materials can be quickly flattened on the uppermost mesh plate 15, please refer to Figure 1 and Figure 8 It can be seen that a movable structure is also provided on the outer surface of the drying tank 9. The movable structure includes a guide rail 8 installed on the frame structure. The drying tank 9 is installed at the upper end of the guide rail 8. An electric push rod 21 is also installed on the frame structure. The telescopic end of the electric push rod 21 is connected to the surface of the drying tank 9. The electric push rod 21 continuously drives the drying tank 9 to move left and right along the guide rail 8, causing the drying tank 9 to shake, and thus enabling the raw materials on the mesh plate 15 to be flattened.

[0037] In order to support the inlet pipe 22, please refer to Figure 1 It can be seen that a clamping body 18 is also installed on the frame structure, and the hot air inlet pipe 22 passes through the clamping body 18.

[0038] For the feeding structure, please refer to Figure 1 and Figure 2 and Figure 4 and Figure 5 It can be seen that supportable installation bodies 5 are symmetrically installed on the upper end face of the frame structure. A double-port feeding structure 6 is connected to the upper end face of the supportable installation body 5. The double-port feeding structure 6 is composed of a conveying structure and a blanking structure for preventing material blockage. The conveying structure includes a spiral feeding cylinder 601 installed on the upper end of the supportable installation body 5. A blanking structure is installed at the upper end of the spiral feeding cylinder 601. A feeding funnel 603 is provided at the upper end of the blanking structure. Discharge ports 605 are symmetrically provided on the surface of the spiral feeding cylinder 601. The discharge ports 605 correspond to the ports of the drying tank 9. A first servo motor 604 is installed at the right end of the spiral feeding cylinder 601. The output end of the first servo motor 604 is connected to a first rotating shaft 606. First spiral plates 607 and second spiral plates 608 are provided on the surface of the first rotating shaft 606. The first spiral plates 607 and the second spiral plates 608 have opposite rotation directions. The first servo motor 604 drives the first rotating shaft 606 to rotate. According to the spiral plates with opposite rotation directions, the raw materials fall out from the two discharge ports 605 respectively, that is, onto the mesh plate 15.

[0039] In order to prevent blockage of the raw materials during falling, please refer to Figure 9It can be seen that the blanking structure includes a feed box 602 installed at the upper end of the spiral feed cylinder 601. A feed hopper 603 is installed at the upper end of the feed box 602. A side box 609 is installed on the left side of the feed box 602. An installation frame 610 is installed at the right side of the feed box 602. A second servo motor 611 is installed on the installation frame 610. The output end of the second servo motor 611 is connected to a second rotating shaft 612. A baffle 613 is installed on the surface of the second rotating shaft 612 inside the feed box 602. The second servo motor 611 drives the second rotating shaft 612 to rotate, thereby driving the baffle 613 to rotate, so that the raw materials in the feed hopper 603 can enter the spiral feed cylinder 601 in batches, preventing blockage problems.

[0040] To facilitate the rotation of the second rotating shaft 612, please refer specifically to Figure 9 It can be seen that bearing seats 614 are installed on the inner side of the side box 609 and the upper end surface of the installation frame 610. The second rotating shaft 612 passes through the inner ring of the bearing seat 614.

[0041] For the overall frame structure of the device, please refer specifically to Figure 1 And Figure 2 It can be seen that, and in combination with the other attached drawings, the frame structure includes multiple groups of frames 1. A stabilizing rod 2 and an installation rod 3 are connected between the multiple groups of frames 1. A main load-bearing rod 7 is also connected in the middle of the frame 1. A guide rail 8 is installed on the upper end surface of the main load-bearing rod 7. An air extraction box 4 is installed on the upper end surface of the installation rod 3. A heating box 19 is installed on the upper end surface of the main load-bearing rod 7. The inner side of the frame 1 located on the upper end surface of the main load-bearing rod 7 is connected with a shorter connecting rod, and an electric push rod 21 is installed on the connecting rod.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rapid drying device for oil extraction raw materials, comprising a frame structure, on which a drying structure for drying the raw materials, a heating structure for heating the air, a heat dissipation structure for dissipating the heat of the evaporated hot air, and a double-port feeding structure (6) are installed, and is characterized in that: There are multiple layers of distributed rapid drying components arranged inside the drying structure, and adjacent two layers are connected to the heat dissipation structure, and the heating structure is connected to the drying structure. Its rapid drying component includes a drying tank (9) installed on the frame structure. A third servo motor (10) is installed on the lower end face of the drying tank (9). The output end of the third servo motor (10) is connected to a coupling. One end of the coupling is connected to a third rotating shaft (11). The inside of the third rotating shaft (11) is a cavity. The upper end of the third rotating shaft (11) is enlarged. A first sealing bearing (13) is fixedly installed in the enlarged part. The inner ring of the first sealing bearing (13) is connected to the heating structure. A mesh plate (15) is installed on the inner wall of the drying tank (9) from top to bottom. An air outlet pipe (17) is connected to the surface of the third rotating shaft (11) between two adjacent groups of mesh plates (15). The inside of the air outlet pipe (17) is a cavity and through holes are provided on the surface of the air outlet pipe (17). The air outlet pipe (17) communicates with the cavity inside the third rotating shaft (11).

2. The rapid drying device for oil extraction raw materials according to claim 1, characterized in that: A blanking pipe is provided at the lower end of the drying tank (9), and a scraper (14) is installed on the surface of the third rotating shaft (11) near the bottom of the drying tank (9). A scraper (14) is provided on the surface of the third rotating shaft (11) above the topmost mesh plate (15) and contacts the upper surface of the mesh plate (15). A second sealing bearing (16) is provided at the connection between the mesh plate (15) and the third rotating shaft (11).

3. The rapid drying device for oil extraction raw materials according to claim 2, characterized in that: The heat dissipation structure includes an air extraction pipe (12) connected to the outer surface of the drying tank (9). The installation position of the air extraction pipe (12) is between two adjacent groups of mesh plates (15). An air extraction box (4) installed on the frame structure. There are three fans provided on the front end face of the air extraction box (4). The air extraction pipe (12) is inserted into the air extraction box (4).

4. A rapid drying device for oil extraction raw materials according to claim 1, characterized in that: The heating structure includes a heating box (19) installed on the frame structure. Air blowers (20) are symmetrically installed at the upper end of the heating box (19). A hot air inlet pipe (22) is provided on the side of the heating box (19). The hot air inlet pipe (22) is fixedly connected to the inner ring of the first sealing bearing (13).

5. The rapid drying device for oil extraction raw materials according to claim 3, characterized in that: An activity structure is further provided on the outer surface of the drying tank (9). The activity structure includes a guide rail (8) installed on the frame structure. The drying tank (9) is installed at the upper end of the guide rail (8). An electric push rod (21) is also installed on the frame structure. The telescopic end of the electric push rod (21) is connected to the surface of the drying tank (9).

6. The rapid drying device for oil extraction raw materials according to claim 4, characterized in that: A clamping body (18) is also installed on the frame structure. The hot air inlet pipe (22) passes through the clamping body (18).

7. A rapid drying device for oil extraction raw materials according to claim 1, characterized in that: On the upper end face of the frame structure, support bodies (5) for installation are symmetrically installed. A double-port feeding structure (6) is connected to the upper end face of the support bodies (5) for installation. The double-port feeding structure (6) includes a conveying structure and a blanking structure for preventing material blockage. The conveying structure includes a spiral feeding cylinder (601) installed on the upper end of the support bodies (5) for installation. A blanking structure is installed at the upper end of the spiral feeding cylinder (601). A feeding hopper (603) is provided at the upper end of the blanking structure. Discharge ports (605) are symmetrically provided on the surface of the spiral feeding cylinder (601). The discharge ports (605) correspond to the ports of the drying tank (9). A first servo motor (604) is installed at the right end of the spiral feeding cylinder (601). The output end of the first servo motor (604) is connected to a first rotating shaft (606). A first spiral plate (607) and a second spiral plate (608) are provided on the surface of the first rotating shaft (606). The rotation directions of the first spiral plate (607) and the second spiral plate (608) are opposite.

8. The rapid drying device for oil extraction raw materials according to claim 7, characterized in that: The blanking structure includes a feeding box (602) installed at the upper end of the spiral feeding cylinder (601). A feeding hopper (603) is installed at the upper end of the feeding box (602). A side box (609) is installed on the left side surface of the feeding box (602). An installation frame (610) is installed at the right side surface of the feeding box (602). A second servo motor (611) is installed on the installation frame (610). The output end of the second servo motor (611) is connected to a second rotating shaft (612). A baffle (613) is installed on the surface of the second rotating shaft (612) inside the feeding box (602).

9. A rapid drying device for oil extraction raw materials according to claim 8, characterized in that: Bearing seats (614) are installed on the inner side surface of the side box (609) and the upper end face of the installation frame (610). The second rotating shaft (612) passes through the inner ring of the bearing seats (614).

10. A rapid drying device for oil extraction raw materials according to claim 1, characterized in that: The frame structure includes multiple groups of frames (1). A stabilizing rod (2) and an installation rod (3) are connected between the multiple groups of frames (1). A main load-bearing rod (7) is further connected at the middle of the frames (1). A guide rail (8) is installed on the upper end face of the main load-bearing rod (7). An air extraction box (4) is installed on the upper end face of the installation rod (3). A heating box (19) is installed on the upper end face of the main load-bearing rod (7). The inner side surface of the frames (1) located on the upper end face of the main load-bearing rod (7) is connected with a shorter connecting rod. An electric push rod (21) is installed on the connecting rod.

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