Vacuum raking machine bottom discharging device

Abstract

The utility model relates to a vacuum raker bottom discharging device, which belongs to the technical field of container material discharging devices, and comprises a valve seat, a valve body, a valve rod and a valve plate, the valve seat is arranged on a vacuum raker, a discharging cavity for discharging is arranged on the valve seat, the valve plate is arranged in the discharging cavity in a sliding manner, the inner diameter of the discharging cavity is sequentially increased along the direction towards the valve body, and the valve rod is arranged on the valve body. The shape of the valve plate is matched with the discharging cavity, a sealing strip is further embedded in the side wall of the valve plate, an air cylinder is connected to the valve body, one end of the valve rod is fixed to the valve plate, the other end of the valve rod is fixed to a piston rod of the air cylinder, and in the process that the air cylinder controls the valve plate to slide to be attached to the discharging cavity, a gap exists between the sealing strip and the inner wall of the discharging cavity. The sealing strip is not easy to contact with the inner wall of the discharging cavity, so that the service life of the sealing strip is effectively prolonged, and the possibility that fine tissues on the sealing strip fall off and are mixed into materials due to the friction of the sealing strip is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of container material discharge devices, in particular to a vacuum rake bottom discharge device. Background Art

[0002] The vacuum rake is a novel vacuum drying equipment specially designed for processing various slurry, paste, granular, powder, fiber and other materials. This dryer works by conduction evaporation, in which the equipment with a scraper agitator continuously removes the material on the hot surface and pushes it in the container to form a circulating flow. After the water evaporates, it is pumped out by a vacuum pump.

[0003] The vacuum rake includes a shell and a drying component. A drying chamber for drying materials is provided in the shell. The drying component is located in the drying chamber. A feed pipe connected to the drying chamber is fixedly provided on the top of the shell. A discharge through hole connected to the drying chamber is provided on the bottom of the shell. The material to be dried enters the drying chamber from the feed pipe, is dried by the drying component, and then is discharged from the drying chamber through the discharge through hole to complete unloading.

[0004] In the prior art, butterfly valves or ball valves are usually used to control the opening and closing of the discharge hole and the outside world, and the purpose of discharging materials is achieved by rotating the valve plate or the ball. However, in actual use, it is found that the valve plate will cause friction on the sealing strip during rotation, which not only reduces the life of the sealing strip to a certain extent, but also the shedding of fine tissues of the sealing strip during the friction process will also affect the purity of the material. Utility Model Content

[0005] In order to reduce the friction on the sealing strip embedded in the valve body during the process of discharging materials, thereby achieving the effect of extending the service life of the sealing strip, the present application provides a bottom unloading device of a vacuum rake.

[0006] The present application provides a vacuum rake bottom unloading device, which adopts the following technical solution:

[0007] A bottom unloading device of a vacuum rake machine comprises a valve seat, a valve body and a valve plate, the valve seat is arranged at the bottom of the vacuum rake machine, a unloading cavity for unloading is opened on the valve seat, the unloading cavity is communicated with a drying cavity in the vacuum rake machine, the valve body is connected to an end of the valve seat facing away from the bottom of the vacuum rake machine, the valve plate is slidably arranged in the unloading cavity, the side wall of the valve plate is fitted with or separated from the inner wall of the unloading cavity after the sliding of the valve plate, the inner diameter of the unloading cavity increases successively in the direction toward the valve body, the shape of the valve plate is adapted to the unloading cavity, a sealing strip is also embedded on the side wall of the valve plate, when the valve plate slides until the side wall of the valve plate fits with the inner wall of the unloading cavity, the sealing strip is pressed against the inner wall of the unloading cavity, and a sliding member for controlling the sliding of the valve plate is provided on the valve body.

[0008] By adopting the above technical scheme, the sliding of the valve plate is controlled by the sliding member, so as to achieve the purpose of controlling the opening and closing of the discharge chamber and the outside world. Since the inner diameter of the discharge chamber increases gradually in the direction toward the valve body, in the process of the valve plate sliding toward the vacuum rake machine, there is a gap between the sealing strip and the inner wall of the discharge chamber, and the sealing strip is not easy to contact with the inner wall of the discharge chamber, which effectively prolongs the service life of the sealing strip and reduces the possibility of fine tissue on the sealing strip falling off and mixing into the material due to the friction of the sealing strip, thereby ensuring the purity of the dried material to a certain extent.

[0009] Preferably, the valve seat comprises a fixing ring, the valve body comprises a sealing ring, and the fixing ring is provided with a sealing groove for embedding the sealing ring.

[0010] By adopting the above technical solution, with the cooperation of the sealing groove and the sealing ring, the connection between the valve body and the valve seat is arranged in a step shape, thereby improving the sealing between the valve body and the valve seat. During the unloading process, the material is not easy to move from the gap between the valve body and the valve seat to the outside of the valve body.

[0011] Preferably, the sliding member includes a fixed seat, a valve stem and a cylinder, the fixed seat is connected to the valve body, the fixed seat passes through the valve body and extends into the valve body, the cylinder is connected to one end of the fixed seat facing away from the valve seat, one end of the valve stem is connected to the piston rod of the cylinder, and the other end of the valve stem is connected to the valve plate, and a sliding through hole for sliding the valve stem is penetrated through the fixed seat, and the valve plate can be driven to slide when the valve stem slides.

[0012] By adopting the above technical solution, the valve stem is driven to slide by the cylinder, thereby achieving the purpose of controlling the sliding of the valve plate, which facilitates the control of the sliding of the valve plate.

[0013] Preferably, a shaft sleeve is provided on the fixing seat, the outer wall of the shaft sleeve is in contact with the inner wall of the sliding through hole of the fixing seat, and the inner wall of the shaft sleeve is in contact with the outer wall of the valve stem.

[0014] By adopting the above technical solution, through the setting of the shaft sleeve, on the one hand, the friction between the valve stem and the fixed seat is reduced, thereby reducing the noise generated by friction during the sliding process of the valve stem and improving the service life of the valve stem; on the other hand, it can also cooperate with the fixed seat to limit the sliding direction of the valve stem, thereby improving the reliability of driving the valve plate to slide through the sliding of the valve stem.

[0015] Preferably, a sphere is provided at one end of the valve stem away from the cylinder, and an embedding groove for the sphere to be embedded is provided on the valve plate. A support plate for supporting the sphere is also provided on the valve stem, and a supporting through hole is penetrated on the support plate for the valve stem to pass through, and the sphere is located between the support plate and the valve plate.

[0016] By adopting the above technical solution and setting the steel ball, the contact area between the valve stem and the valve plate is increased, so that the valve stem and the valve plate are not easily bent and deformed after long-term use, and the valve stem is effectively used to control the sliding of the valve plate, thereby achieving the effect of controlling the opening and closing of the discharge chamber with the outside world. When the valve stem is controlled to slide by the cylinder, the valve plate can be driven to slide along the axis of the valve seat synchronously, thereby controlling the opening and closing of the discharge chamber with the outside world.

[0017] Preferably, the sealing groove is located on a side of the inner wall of the discharge chamber away from the valve seat axis.

[0018] By adopting the above technical solution, when the material moves from the drying chamber toward the valve body, the material will slide along the inner wall of the discharge chamber. Under the condition that the material flow rate and flow velocity are stable, it is not easy for the material to slide toward the sealing groove, so that the material is not easy to accumulate between the valve body and the valve seat, thereby ensuring the reliability of the fixation of the valve body and the valve seat to a certain extent.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. Since the inner diameter of the discharge chamber increases gradually in the direction toward the valve body, there is a gap between the sealing strip and the inner wall of the discharge chamber when the valve plate slides toward the vacuum rake machine. The sealing strip is not easy to contact the inner wall of the discharge chamber, which effectively prolongs the service life of the sealing strip and reduces the possibility of fine tissues on the sealing strip falling off and mixing into the material due to the friction of the sealing strip, thus ensuring the purity of the dried material to a certain extent;

[0021] 2. With the cooperation of the sealing groove and the sealing ring, the connection between the valve body and the valve seat is set in a step shape, which improves the sealing between the valve body and the valve seat. During the unloading process, the material is not easy to move from the gap between the valve body and the valve seat to the outside of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the valve plate in an embodiment of the present application sliding to close the discharge chamber.

[0023] Figure 2 It is a structural schematic diagram of the valve plate sliding to open the discharge chamber in the embodiment of the present application.

[0024] Explanation of the reference numerals: 1. valve seat; 11. discharge chamber; 12. fixing ring; 121. sealing groove; 2. valve body; 21. sealing ring; 3. valve plate; 31. sealing strip; 32. fitting groove; 4. fixing seat; 41. sliding through hole; 42. bushing; 5. cylinder; 7. valve stem; 71. ball; 72. support plate. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-2The utility model is described in further detail.

[0026] The present application embodiment discloses a vacuum rake bottom unloading device, referring to Figure 1 and Figure 2 , including a valve seat 1, a valve body 2 and a valve plate 3. The valve seat 1 is fixedly arranged at the bottom of the vacuum rake. The vacuum rake includes a shell. A drying chamber for drying materials is arranged in the shell. A discharge through hole communicating with the drying chamber is provided at the bottom of the shell. In the embodiment of the present application, the outer wall of the valve seat 1 is fitted with the inner wall of the discharge through hole, and a discharge chamber 11 for discharging is penetrated and opened on the valve seat 1. The discharge chamber 11 is communicated with the drying chamber. The dried materials in the drying chamber can be separated from the vacuum rake through the discharge chamber 11.

[0027] Reference Figure 1 and Figure 2 , the valve body 2 is fixed to the end of the valve seat 1 away from the bottom of the vacuum rake, the valve seat 1 includes a fixing ring 12, the valve body 2 includes a sealing ring 21, and the fixing ring 12 is provided with a sealing groove 121 for the sealing ring 21 to be embedded. The connection between the valve body 2 and the valve seat 1 is arranged in a step-like shape, which improves the sealing between the valve body 2 and the valve seat 1, and the material is not easy to move from the gap between the valve body 2 and the valve seat 1 to the outside of the valve body 2. In addition, in the actual use process, it is also possible to choose whether to add a sealing gasket in the sealing groove 121 according to the material situation, so as to further improve the sealing between the valve body 2 and the valve seat 1. The fixing ring 12 and the sealing ring 21 are fixed by bolts, which is convenient for the disassembly and assembly between the valve body 2 and the valve seat 1, so as to facilitate the later inspection and maintenance.

[0028] Reference Figure 1 and Figure 2 The valve plate 3 is slidably arranged in the discharge chamber 11. After the valve plate 3 slides, the side wall of the valve plate 3 is attached to or separated from the inner wall of the discharge chamber 11, so as to achieve the effect of controlling the discharge chamber 11 to be open or closed with the outside world; the inner diameter of the discharge chamber 11 is gradually increased in the direction toward the valve body 2, and the shape of the valve plate 3 is adapted to the discharge chamber 11. A sealing strip 31 is also embedded on the side wall of the valve plate 3. When the valve plate 3 slides until the side wall of the valve plate 3 is attached to the inner wall of the discharge chamber 11, the sealing strip 31 is attached to the inner wall of the discharge chamber 11. Since the inner diameter of the discharge chamber 11 increases gradually in the direction toward the valve body 2, when the valve plate 3 slides toward the vacuum rake, there is a gap between the sealing strip 31 and the inner wall of the discharge chamber 11, so the sealing strip 31 is not easy to contact with the inner wall of the discharge chamber 11, which effectively prolongs the service life of the sealing strip 31 and reduces the possibility of fine tissue on the sealing strip 31 falling off and mixing into the material due to the friction of the sealing strip 31, thereby ensuring the purity of the dried material to a certain extent.

[0029] Reference Figure 1 and Figure 2, the sealing groove 121 is arranged on the side of the inner wall of the discharge cavity 11 away from the axis of the valve seat 1. In the figure, it is shown that the sealing groove 121 is on the side of the extension line of the inner wall of the discharge cavity 11 away from the axis of the valve seat 1. During the process of the material moving from the drying cavity towards the valve body 2, the material will slide along the inner wall of the discharge cavity 11. Through the above arrangement, when the material flow rate and velocity are stable, it is not easy for the material to slide towards the direction of the sealing groove 121, so that the material is not easy to accumulate between the valve body 2 and the valve seat 1, which to a certain extent ensures the reliability of the fixation between the valve body 2 and the valve seat 1.

[0030] Referring to Figure 1 and Figure 2 , a sliding member for controlling the sliding of the valve plate 3 is provided on the valve body 2. The sliding member includes a fixed seat 4, a valve rod 7 and a cylinder 5. The fixed seat 4 is fixedly arranged on the valve body 2. The fixed seat 4 penetrates through the valve body 2 and extends into the valve body 2. Since the valve plate 3 in this application slides along the axis of the discharge cavity 11, the valve body 2 is integrally bent to provide a space for the installation of the sliding member. The cylinder 5 is fixed to the end of the fixed seat 4 away from the valve seat 1 by bolts. One end of the valve rod 7 is threadedly connected to the piston rod of the cylinder 5. The piston rod of the cylinder 5 is coaxially arranged with the valve rod 7. An external thread is provided at the end of the valve rod 7 facing the cylinder 5, and a thread groove threadedly engaged with the external thread is provided on the piston rod of the cylinder 5, effectively ensuring the connection strength between the valve rod 7 and the cylinder 5 and facilitating the disassembly and assembly of the valve rod 7.

[0031] Referring to Figure 1 and Figure 2 , the other end of the valve rod 7 is fixed to the valve plate 3. A sphere 71 is fixedly provided at the end of the valve rod 7 away from the cylinder 5. In the embodiment of this application, the sphere 71 is made of stainless steel. An engaging groove 32 for the sphere 71 to be fitted is provided on the valve plate 3. A support plate 72 for supporting the sphere 71 is also slidably connected to the valve rod 7. The support plate 72 is attached to the outer surface of the sphere 71. A support through hole for the valve rod 7 to pass through is provided through the support plate 72. The sphere 71 is located between the support plate 72 and the valve plate 3. The support plate 72 is fixed to the valve body 2 by bolts. Through the setting of the steel ball, the contact area between the valve rod 7 and the valve plate 3 is increased, so that the valve rod 7 and the valve plate 3 are not easy to bend and deform after long-term use, effectively ensuring that the valve plate 3 is controlled to slide through the valve rod 7, so as to achieve the effect of controlling the opening and closing of the discharge cavity 11 to the outside. When the valve rod 7 is controlled to slide by the cylinder 5, the valve plate 3 can be synchronously driven to slide along the axis direction of the valve seat 1, so as to control the opening and closing of the discharge cavity 11 to the outside.

[0032] Referring to Figure 1 and Figure 2, a sliding through hole 41 for the valve stem 7 to slide through is formed through the fixing seat 4. A bushing 42 is fixedly arranged on the fixing seat 4. The outer wall of the bushing 42 fits with the inner wall of the sliding through hole 41 of the fixing seat 4, and the inner wall of the bushing 42 fits with the outer wall of the valve stem 7. Through the arrangement of the bushing 42, on the one hand, the friction between the valve stem 7 and the fixing seat 4 is reduced, thereby reducing the noise generated by friction during the sliding of the valve stem 7 and improving the service life of the valve stem 7. On the other hand, it can also cooperate with the fixing seat 4 to limit the sliding direction of the valve stem 7, improving the reliability of driving the valve plate 3 to slide through the sliding of the valve stem 7.

[0033] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A vacuum rake bottom unloading device, characterized in that: The invention comprises a valve seat (1), a valve body (2) and a valve plate (3), wherein the valve seat (1) is arranged at the bottom of the vacuum rake, and a discharge cavity (11) for discharging is provided on the valve seat (1), and the discharge cavity (11) is communicated with a drying cavity in the vacuum rake, and the valve body (2) is connected to an end of the valve seat (1) away from the bottom of the vacuum rake, and the valve plate (3) is slidably arranged in the discharge cavity (11), and after the valve plate (3) slides, the side wall of the valve plate (3) and the inner wall of the discharge cavity (11) are in contact with each other. The inner wall of the discharge cavity (11) is fitted or separated, the inner diameter of the discharge cavity (11) increases gradually in the direction toward the valve body (2), the shape of the valve plate (3) is adapted to the discharge cavity (11), and a sealing strip (31) is embedded on the side wall of the valve plate (3). When the valve plate (3) slides until the side wall of the valve plate (3) fits the inner wall of the discharge cavity (11), the sealing strip (31) is tightly pressed against the inner wall of the discharge cavity (11), and a sliding member for controlling the sliding of the valve plate (3) is provided on the valve body (2).

2. The bottom unloading device of the vacuum rake according to claim 1, characterized in that: The valve seat (1) comprises a fixing ring (12), the valve body (2) comprises a sealing ring (21), and the fixing ring (12) is provided with a sealing groove (121) for the sealing ring (21) to be embedded.

3. The bottom unloading device of the vacuum rake according to claim 1, characterized in that: The sliding member comprises a fixed seat (4), a valve stem (7) and a cylinder (5); the fixed seat (4) is connected to the valve body (2); the fixed seat (4) passes through the valve body (2) and extends into the valve body (2); the cylinder (5) is connected to one end of the fixed seat (4) which is away from the valve seat (1); one end of the valve stem (7) is connected to the piston rod of the cylinder (5); the other end of the valve stem (7) is connected to the valve plate (3); a sliding through hole (41) for sliding the valve stem (7) is provided on the fixed seat (4); when the valve stem (7) slides, it can drive the valve plate (3) to slide.

4. The bottom unloading device of the vacuum rake according to claim 3, characterized in that: The fixing seat (4) is provided with a shaft sleeve (42), the outer wall of the shaft sleeve (42) is in contact with the inner wall of the sliding through hole (41) of the fixing seat (4), and the inner wall of the shaft sleeve (42) is in contact with the outer wall of the valve stem (7).

5. The bottom unloading device of the vacuum rake according to claim 3, characterized in that: A ball (71) is provided at one end of the valve stem (7) away from the cylinder (5); an engaging groove (32) for the ball (71) to engage is provided on the valve plate (3); a support plate (72) for supporting the ball (71) is also provided on the valve stem (7); a supporting through hole is provided on the support plate (72) for the valve stem (7) to pass through; and the ball (71) is located between the support plate (72) and the valve plate (3).

6. The bottom unloading device of the vacuum rake according to claim 2, characterized in that: The sealing groove (121) is located on a side of the inner wall of the discharge chamber (11) that is away from the axis of the valve seat (1).

Images