A vacuum rake dryer

Abstract

The present application discloses a vacuum rake dryer, which belongs to the field of drying devices and is used for material drying. It includes a material tank placed on a frame, and a stirring device for stirring materials is arranged inside the material tank, and the stirring device is driven by a stirring power device on the material tank; the material tank is provided with a feed port at the end face through which the stirring device penetrates, and the feed port is connected with the interior of the material tank; the material tank is connected with the discharge port through a discharge pipe, and a piston driven by a cylinder is arranged inside the discharge pipe. On the basis of the above technical scheme, the present application can achieve the purpose of improving the internal vacuum drying area by improving the structure of the vacuum rake dryer, and ensure the material drying effect at the outlet, and reduce the scouring of the discharge port on the stirring shaft assembly.

Description

Technical Field

[0001] The present application belongs to the field of drying devices, and more specifically, particularly relates to a vacuum rake dryer. Background Art

[0002] The rake dryer is suitable for drying heat-sensitive materials, materials that are easily oxidized at high temperatures, or materials that are easy to harden during drying, and materials whose steam discharged during drying must be recovered. It is an improved design based on the traditional domestic vacuum rake dryer. Referring to the patent document with the Chinese patent publication number CN113932584A, it discloses a rake dryer for the production of polyurethane sealant, which includes a dryer housing and a vacuum pump, and also includes a first rotating rake, a connecting member and a second rotating rake, the first rotating rake includes a rotating shaft and a first rake tooth group, the rotating shaft is a round rod body coaxially arranged with the inner cylinder, the first rake tooth group has a plurality of first rake tooth groups, and the plurality of first rake tooth groups are arranged at intervals along the length direction of the rotating shaft, and each of the first rake tooth groups includes a first upper rake tooth and a first lower rake tooth with the same structure and size; the connecting member includes a connecting cylinder and a transmission gear, and each connecting member is provided with a second rotating rake, and the second rotating rake includes a limit ring and a second rake tooth.

[0003] Compared with patent document CN113932584A, a vacuum rake dryer is also disclosed in patent document CN116558244A in China, and the following technical scheme is specifically disclosed: it comprises two parallel columns, an upper drying cylinder is rotatably connected above the two columns, and a lower drying cylinder is rotatably connected below the upper drying cylinder, an upper drying chamber is provided inside the upper drying cylinder, and a stirring and knocking component is provided inside the upper drying chamber, an upper feed bin is provided at the top of the upper drying cylinder, and an upper discharge bin is provided at the bottom of the upper drying cylinder, a lower drying chamber is provided inside the lower drying cylinder, and a stirring and heating component is provided inside the lower drying chamber; a lower feed bin is provided at the top of the lower drying chamber.

[0004] According to the structure shown in the attached figure of patent document CN116558244A, the upper feed bin (feed inlet) and the lower feed bin (feed outlet) are also arranged vertically with the stirring device, and there is also a sufficient distance between the lower feed bin and the chamber where the stirring device is located.

[0005] On the basis of the above-mentioned existing technical scheme, its feed barrel is located above the stirring device. After the material falls, it will cause scouring to the stirring structure, and the scouring process may cause the shaft of the stirring device to deform; at the same time, since the discharge barrel is arranged below the discharge direction, there is a large distance between the discharge barrel and the inner barrel. After the material enters this section of the tube body, it will be impossible to continue drying, affecting the drying effect of the material. Summary of the invention

[0006] The purpose of the present application is to provide a vacuum rake dryer, which achieves the purpose of increasing the internal vacuum drying area by improving the structure of the vacuum rake dryer, and ensures the material drying effect at the outlet, and reduces the scouring of the discharge port on the stirring shaft assembly.

[0007] To achieve the above objectives, this application is implemented through the following technical solutions:

[0008] A vacuum rake dryer described in the present application comprises a material tank placed on a frame, wherein a stirring device for stirring materials is arranged inside the material tank, and the stirring device is driven by a stirring power device on the material tank; a feed port is arranged at the penetration end face of the stirring device of the material tank, and the feed port is connected with the interior of the material tank; the material tank is connected with the discharge port through a discharge pipe, and a piston driven by a cylinder is arranged inside the discharge pipe.

[0009] As one of the preferred technical solutions of the present application, the exterior of the material tank is covered with a jacket, and the jacket is respectively connected to a steam inlet and a condensed water outlet.

[0010] As one of the preferred technical solutions of the present application, the cylinder is installed at the outlet end of the discharge pipe, the telescopic end of the cylinder is connected to a piston, and a plurality of seals are provided on the circumferential side of the piston at the contact position with the inner wall of the discharge pipe.

[0011] As one of the preferred technical solutions of the present application, the material tank is connected to a vacuum port, and the vacuum port is located at the top of the material tank.

[0012] As one of the preferred technical solutions of the present application, the discharge pipe is located close to the bottom of the material tank, and the feed port is located at the material tank below or on both sides of the stirring device.

[0013] Compared with the prior art, the beneficial effects of this application are:

[0014] 1. The present application improves the structure at the bottom discharge port, adds a cylinder and a piston driven by the cylinder, so that the cylinder controls the piston to make reciprocating motion on the discharge side, controls the opening and closing of the bottom discharge port, and the piston is flush with the end face flange, so that the material can be completely present in the vacuum drying space.

[0015] 2. The present application avoids the problem of deformation of the stirring shaft caused by the material at the feed inlet scouring the stirring device by arranging the feed inlet in a direction coaxial with the stirring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the main view of this application.

[0017] Figure 2 yes Figure 1 Cross-sectional view of the AA portion.

[0018] In the figure: 1. material tank; 2. jacket; 3. feed port; 4. discharge port; 5. piston; 6. cylinder; 7. seal; 8. discharge pipe; 9. stirring device; 10. stirring power device; 11. steam inlet; 12. vacuum port; 13. condensate outlet; 14. frame. DETAILED DESCRIPTION

[0019] The technical solution described in this application is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Example 1

[0021] like Figure 1 As shown, a vacuum rake dryer includes a frame 14 placed on a horizontal surface or a base, on which a material tank 1 and a stirring power device 10 are respectively installed. The stirring power device 10 can adopt a gearbox body driven by a power mechanism, and the output end of the gearbox body is connected to a stirring device 9, which is located inside the material tank 1.

[0022] The material tank 1 is a hollow cylindrical structure with openings at both ends and a central axis placed parallel to a horizontal plane. End covers are fixed at the openings at both ends of the material tank 1, and the shaft of the stirring device 9 is connected to the end covers.

[0023] The circumferential outer wall of the material tank 1 is covered with a jacket 2, and a sufficient gap is left between the jacket 2 and the circumferential outer wall of the material tank 1. The jacket 2 is connected with a steam inlet 11 and a condensed water outlet 13, the steam inlet 11 is located above the jacket 2, and the condensed water outlet 13 is located below the jacket 2. The steam inlet 11 allows steam to enter the interior of the jacket 2 and fill the jacket 2, and realize heat exchange with the material tank 1, and the cooled steam is discharged through the condensed water outlet 13.

[0024] The material tank 1 is also connected to a vacuum port 12 at the top, and the vacuum port 12 can ensure that a negative pressure area for drying is formed in the material tank 1 .

[0025] The material tank 1 is provided with a feed port 3 and a discharge pipe 8 in the direction of the material conveying of the stirring device 9. The feed port 3 is located at the starting end of the material conveying of the stirring device 9, and the discharge pipe 8 is located at the end of the material conveying of the stirring device 9. The feed port 3 and the discharge pipe 8 are both located below the stirring device 9 and close to the bottom end of the material tank 1. Or in the present application, the discharge pipe 8 is located below the stirring device 9 and close to the bottom end of the material tank 1, and the feed port 3 is located at the end face of the material tank 1 on both sides of the stirring device 9. The position of the feed port 3 should ensure that the material fed therein will not cause erosion to the shaft of the stirring device 9, so as to reduce the impact on the stirring device 9.

[0026] The discharge pipe 8 is connected to a discharge port 4 extending downward at the outer tube body extending out of the material tank 1 , and the discharge port 4 and the discharge pipe 8 form a T-shaped structure.

[0027] The discharge pipe 8 is provided with a piston 5 for connecting and disconnecting the discharge pipe 8 and the discharge port 4 . The piston 5 is driven by a cylinder 6 , and the cylinder 6 is connected to the tail end of the discharge pipe 8 .

[0028] Example 2

[0029] A vacuum rake dryer, wherein the piston 5 is provided with a plurality of seals 7 on the circumferential side surface where the inner wall of the discharge pipe 8 contacts, and the end surface of the piston 5 is flush with the end surface where the discharge pipe 8 communicates with the material tank 1 to ensure the degree of dryness at this position. The discharge pipe 8 is coaxially arranged with the feed port 3. The structure and connection relationship of the remaining parts are the same as those described in any one of the aforementioned embodiments, and will not be repeated here to avoid cumbersome text.

[0030] Based on the above embodiments, the following paragraphs will continue to describe in detail the technical features involved and the functions and roles played by the technical features in the present technical solution, so as to help technicians in this field to fully understand the technical solution and reproduce it.

[0031] In the present application, the frame 14 is used to fix the material tank 1 and prevent the material tank 1 from moving. The material tank 1 is used to temporarily store the material during the drying process, and allows the material to move along the conveying direction of the stirring device 9 under the action of the internal stirring device 9, and during the movement, the material tank 1 can exchange heat with the steam fed by the steam inlet 11 in the jacket 2 to achieve material drying.

[0032] The stirring device 9 can achieve drying and breaking up of the material during the conveying process, thereby improving the drying efficiency of the material.

[0033] The vacuum port 12 can realize the generation of a negative pressure environment in the material tank 1, so as to facilitate timely discharge of water vapor generated inside due to drying, thereby ensuring the drying effect of the material.

[0034] The stirring power device 10 can drive the stirring device 9 to achieve stirring movement of the material from the feed port 3 to the discharge pipe 8 .

[0035] The steam inlet 11 can realize the output of steam into the jacket 2, the jacket 2 realizes heat exchange with the material tank 1, and the condensed or cooled steam is discharged from the condensate outlet 13. In order to facilitate the movement of steam and sufficient heat exchange with the material tank 1, the steam inlet 11 is arranged at the upper part of the jacket 2, and the condensate outlet 13 is arranged at the bottom of the jacket 2.

[0036] The discharge pipe 8 and the feed port 3 can be coaxially arranged, and are evenly distributed and arranged at a position below the stirring device 9. The feed port 3 and the discharge pipe 8 are both arranged close to the bottom of the material tank 1, which is convenient for feeding and discharging materials. Based on the above structure, the feed port 3 can prevent the material fed into the material tank 1 from impacting the shaft of the stirring device 9, and prevent the shaft of the stirring device 9 from being deformed under the scouring of the material; the discharge pipe 8 can realize the timely discharge of the material.

[0037] In the present application, the discharge pipe 8 and the discharge port 4 form a T-shaped structure, and the discharge port 4 is located at the external position where the discharge pipe 8 extends out of the material tank 1. A piston 5 is arranged inside the discharge pipe 8, which is coaxial with the discharge pipe 8 and moves relative to it, and a plurality of seals 7 are arranged on the contact surface between the piston 5 and the discharge pipe 8. The piston 5 moves under the action of the cylinder 6, and the cylinder 6 is fixed at the tail end of the discharge pipe 8. In the initial state, the piston 5 can achieve the blockage at the junction of the discharge pipe 8 and the material tank 1, and the end face of the piston 5 is flush with the position. When the piston 5 moves along the discharge pipe 8, the discharge pipe 8 and the discharge port 4 can be connected and disconnected to realize the discharge of the material. At the same time, in the above structure, the piston 5 can ensure the drying area in the material tank 1, ensure the drying effect of the material, and avoid the problem that the material cannot be completely dried due to partial premature entry into the discharge pipe 8.

[0038] Finally, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A vacuum rake dryer, comprising a material tank (1) placed on a frame (14), wherein a stirring device (9) for stirring the material is arranged inside the material tank (1), and the stirring device (9) is driven by a stirring power device (10) on the material tank (1), characterized in that: The material tank (1) is provided with a feed port (3) at the end surface where the material tank (1) penetrates the stirring device (9), and the feed port (3) is connected to the interior of the material tank (1); the material tank (1) is connected to the discharge port (4) via a discharge pipe (8), and a piston (5) driven by a cylinder (6) is provided in the discharge pipe (8).

2. A vacuum rake dryer according to claim 1, characterized in that: The material tank (1) is coated with a jacket (2) on the outside, and the jacket (2) is respectively connected to a steam inlet (11) and a condensed water outlet (13).

3. A vacuum rake dryer according to claim 1, characterized in that: The cylinder (6) is installed at the outlet end of the discharge pipe (8), the telescopic end of the cylinder (6) is connected to the piston (5), and a plurality of sealing members (7) are provided on the circumferential side surface of the piston (5) at a position in contact with the inner wall of the discharge pipe (8).

4. A vacuum rake dryer according to any one of claims 1 to 3, characterized in that: The material tank (1) is connected to a vacuum port (12), and the vacuum port (12) is located at the top of the material tank (1).

5. A vacuum rake dryer according to any one of claims 1 to 3, characterized in that: The discharge pipe (8) is located close to the bottom of the material tank (1), and the feed port (3) is located below or on both sides of the stirring device (9) at the material tank (1).

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