Feeding device applied to L-dihydrophenylglycine production

Abstract

A feeding device applied to production of L-dihydrophenylglycine relates to the field of feeding equipment and comprises a shell, a filter screen is mounted in the shell, an air outlet is formed in the shell and corresponds to the space above the filter screen, a feeding port is formed in the shell and corresponds to the space below the filter screen, and the filter screen is formed by weaving elastic silk threads; the supporting piece is supported on the upper side of the filter screen, so that the position of the filter screen is kept stable when airflow passes through; the nut is fixed in the center of the filter screen; the screw rod penetrates through the center of the nut and is spirally connected with the nut; and the motor is fixedly installed at the top of the shell, and an output shaft of the motor is fixedly connected with the upper end of the screw rod, so that the screw rod is driven to rotate. According to the invention, the filter screen is formed by weaving the elastic fibers, when the filter screen needs to be cleaned, the filter screen is downwards stretched under the driving of the motor, and after the filter screen is stretched, agglomerated materials and the filter screen are loosened, so that the agglomerated materials are more easily blown off by reverse blowing airflow.

Description

Technical Field

[0001] The invention belongs to the field of feeding equipment, and in particular relates to a feeding device used for the production of L-dihydrophenylglycine. Background Art

[0002] In the production process of L-dihydrophenylglycine, the powdered raw materials need to be transported to the reactor through a vacuum feeding device. The working principle of the vacuum feeding device is that the airflow generated by the fan sucks the powdered materials to the top of the reactor, and then the materials are separated from the air through the filter. After separation, the materials fall into the reactor, thereby realizing feeding.

[0003] In production practice, the filter will be clogged with materials after being used for a period of time and needs to be cleaned regularly. The existing cleaning method mainly uses high-pressure air to blow back the filter from above to remove the powder adhering to the filter element. However, this method can only partially remove the material particles on the filter, and it is difficult to remove the agglomerated material particles. In addition, when used for a long time, the filter still needs to be disassembled frequently to clean the filter.

[0004] Therefore, it is necessary to design a new type of feeding device to improve the cleaning effect of the filter screen. Summary of the invention

[0005] The invention provides a feeding device applied to the production of L-dihydrophenylglycine, aiming at improving the cleaning effect of a filter screen in a vacuum feeding machine.

[0006] The technical problem solved by the present invention is achieved by the following technical solution: The present invention provides a feeding device for the production of L-dihydrophenylglycine, comprising a shell, a filter screen is installed inside the shell, an air outlet is arranged on the shell corresponding to the space above the filter screen, and a feed port is arranged corresponding to the space below the filter screen; The filter is woven from elastic silk threads; A support member is supported on the upper side of the filter screen so as to keep the filter screen in a stable position when air flows through the filter screen; Nut, fixed in the center of the filter; A screw rod passes through the center of the nut and is spirally connected to the nut; A motor is fixedly mounted on the top of the housing, and an output shaft of the motor is fixedly connected to the upper end of the screw, thereby driving the screw to rotate; After the motor is started, the rotating screw can move the nut downward, thereby pulling the filter downward and stretching the elastic wires that make up the filter. After stretching, the agglomerated material becomes loose between the filter, making it easier to be blown off by the back-blowing airflow.

[0007] As a preferred solution, the support body is conical in shape, and when in use, the filter screen is pressed against the lower surface of the support body under the action of its own elastic force.

[0008] As a preferred solution, in a natural state, the filter mesh is woven into a three-dimensional cone shape, and the taper is the same as the taper of the support body.

[0009] As a preferred solution, a guide pin is provided on the side of the nut, and the guide pin is inserted into the spiral groove at the lower end of the screw rod, thereby realizing the spiral connection between the nut and the screw rod.

[0010] As a preferred solution, a retraction notch is processed at the lower end of the screw, and the retraction notch is located at the end of the spiral groove. During the rotation of the screw, when the guide pin on the nut slides to the end of the spiral groove and continues to slide, the nut and the guide pin will retract to the previous circle of the spiral groove under the action of the elastic restoring force provided by the filter screen. The screw continues to rotate, and the guide pin slides to the end of the spiral groove again, and then retracts to the previous circle of the spiral groove again, and so on and so forth, so that the rotational motion of the screw is converted into vertical vibration of the nut, and the vertical vibration makes it easy for the material attached to the filter screen to fall off.

[0011] As a preferred solution, the support member is a metal mesh or a metal perforated plate.

[0012] The present invention improves the prior art and produces the following effects: 1. In the present invention, the filter screen is woven with elastic fibers. When the filter screen needs to be cleaned, the filter screen is stretched downward under the drive of a motor. After stretching, the agglomerated materials and the filter screen are loosened, so that they are more easily blown off by the back-blowing airflow.

[0013] 2. In the present invention, after the filter screen is stretched and tightened, the nut can perform high-frequency vertical vibration under the drive of the motor and the screw (high-frequency vibration and airflow backblowing can be performed simultaneously), so that the material attached to the filter screen is easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the upper part of the present invention.

[0016] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0017] Figure 4 It is a schematic diagram of the structure of the filter after stretching.

[0018] In the figure, 1. motor, 2. air outlet, 3. housing, 4. feed inlet, 5. discharge outlet, 6. retraction cutout, 7. filter screen, 8. support, 9. nut, 10. guide pin, 11. spiral groove. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings: like Figure 1 As shown, this embodiment includes a housing 3, a filter screen 7 is installed inside the housing 3, an air outlet 2 is arranged on the housing 3 corresponding to the space above the filter screen 7, a feed inlet 4 is arranged corresponding to the space below the filter screen 7, and a discharge port 5 is arranged at the lower end of the housing 3. The above is a conventional structure in the prior art and will not be described in detail here.

[0020] In this embodiment, the filter screen 7 is woven from elastic threads, and fine meshes are formed between the woven elastic threads. Airflow can pass through the meshes, but particulate materials cannot pass through, thereby separating the materials from the airflow.

[0021] like Figure 2 , 3 As shown, in this embodiment, the support member 8 is supported on the upper side of the filter screen 7. The support member 8 can be made of a high-density metal mesh, a metal perforated plate, or an inelastic fabric supported by a skeleton, so as to keep the filter screen 7 stable when the airflow passes through. At the same time, the fine support can prevent the airflow from stretching the elastic wires in the filter screen 7, thereby preventing the mesh of the filter screen 7 from being expanded by the airflow. Because the airflow comes from the lower side of the filter screen 7, the filter screen 7 only needs to be supported on the upper side of the filter screen 7.

[0022] like Figure 2 , 3 As shown in FIG. 4 , in this embodiment, the nut 9 is fixed at the center of the filter screen 7 , the nut 9 is disc-shaped, and the filter screen 7 is fixed at the periphery of the disc-shaped structure, which is conducive to uniform pulling of the filter screen 7 .

[0023] like Figure 2 , 3 As shown in FIG. 4 , in this embodiment, the screw rod passes through the center of the nut 9 and is spirally connected to the nut 9. The rotational motion of the screw rod can be converted into the linear motion of the nut 9 through the spiral connection structure.

[0024] like Figure 1 , 2 As shown in FIG. 3 , in this embodiment, the motor 1 is fixedly mounted on the top of the housing 3 , and the output shaft of the motor 1 is fixedly connected to the upper end of the screw, thereby driving the screw to rotate.

[0025] like Figure 3 , 4As shown, in this embodiment, the support body is in a cone shape. When in use, the filter screen 7 is pressed against the lower surface of the support body under its own elastic force, so that the filter screen 7 is tightened. At the same time, in the natural state, the filter screen 7 is woven into a three-dimensional cone shape, and the taper is the same as the taper of the support body. After adopting the above structure, the mesh density of the filter screen 7 is more uniform, and the mesh size is more stable, which is conducive to ensuring the filtering effect.

[0026] like Figure 3 As shown, in this embodiment, a guide pin 10 is provided on the side of the nut 9, and the guide pin 10 is inserted into the spiral groove 11 at the lower end of the screw, thereby realizing the spiral connection between the nut 9 and the screw. Compared with the ordinary spiral connection (i.e., threaded connection), the pitch of this connection method can be made larger, so that the nut 9 and the filter screen 7 respond to the power of the motor 1 more quickly.

[0027] like Figure 2 As shown, in this embodiment, a retraction cutout 6 is processed at the lower end of the screw, and the retraction cutout 6 is located at the end of the spiral groove 11.

[0028] Working principle: When the filter screen 7 needs to be cleaned, the motor 1 is started, and the rotating screw can move the nut 9 downward, thereby pulling the filter screen 7 downward, so that the elastic wires constituting the filter screen 7 are stretched. After stretching, the agglomerated materials and the filter screen 7 are loosened. At this time, the filter screen 7 is blown downward from the upper side of the filter screen 7 with high-pressure air, and the agglomerates on the filter screen 7 are more easily blown off by the back-blowing airflow.

[0029] In addition, during the rotation of the screw, when the guide pin 10 on the nut 9 slides to the end of the spiral groove 11, the filter screen 7 is tightened at this time, but does not exceed the limit of elastic deformation. After continuing to slide, the nut 9 and the guide pin 10 will retreat to the previous circle of the spiral groove 11 under the action of the elastic restoring force provided by the filter screen 7. The screw continues to rotate, and the guide pin 10 slides to the end of the spiral groove 11 again, and then retreats to the previous circle of the spiral groove 11 again. This is repeated, so that the rotational motion of the screw is converted into vertical vibration of the nut 9 (high-frequency vibration and airflow backblowing can be carried out simultaneously). In practice, the rotation speed of the motor 1 can reach hundreds or even thousands of times, that is, hundreds or even thousands of high-frequency vibrations can be generated per minute, thereby making it easy for the material attached to the filter screen 7 to fall off.

Claims

1. A feeding device for producing L-dihydrophenylglycine, comprising a housing (3), a filter screen (7) installed inside the housing (3), an air outlet (2) arranged on the housing (3) corresponding to the space above the filter screen (7), and a feed port (4) arranged on the housing (3) corresponding to the space below the filter screen (7), characterized in that: The filter screen (7) is woven from elastic silk threads; A support member (8) supported on the upper side of the filter screen (7) so as to keep the filter screen (7) in a stable position when air flows through; A nut (9) fixed at the center of the filter screen (7); A screw rod passes through the center of the nut (9) and is spirally connected to the nut (9); A motor (1) is fixedly mounted on the top of the housing (3), and an output shaft of the motor (1) is fixedly connected to the upper end of the screw, thereby driving the screw to rotate; After the motor (1) is started, the rotating screw can move the nut (9) downward, thereby pulling the filter screen (7) downward, causing the elastic wires constituting the filter screen (7) to stretch. After the stretching, the agglomerated material and the filter screen (7) become loose, thereby being more easily blown off by the back-blowing airflow.

2. A feeding device for the production of L-dihydrophenylglycine according to claim 1, characterized in that: The support body is conical in shape, and when in use, the filter screen (7) is pressed against the lower surface of the support body under the action of its own elastic force.

3. A feeding device for the production of L-dihydrophenylglycine according to claim 2, characterized in that: In a natural state, the filter screen (7) is woven into a three-dimensional cone shape, and the taper is the same as the taper of the support body.

4. A feeding device for the production of L-dihydrophenylglycine according to any one of claims 1 to 3, characterized in that: A guide pin (10) is provided on the side of the nut (9), and the guide pin (10) is inserted into the spiral groove (11) at the lower end of the screw rod, thereby realizing a spiral connection between the nut (9) and the screw rod.

5. A feeding device for the production of L-dihydrophenylglycine according to claim 4, characterized in that: The lower end of the screw is processed with a retraction notch (6), and the retraction notch (6) is located at the end of the spiral groove (11). During the rotation of the screw, when the guide pin (10) on the nut (9) slides to the end of the spiral groove (11), it continues to slide, and the nut (9) and the guide pin (10) will retract to the previous circle of the spiral groove (11) under the action of the elastic restoring force provided by the filter screen (7). The screw continues to rotate, and the guide pin (10) slides to the end of the spiral groove (11) again, and then retracts to the previous circle of the spiral groove (11) again. This is repeated, so that the rotational movement of the screw is converted into the vertical vibration of the nut (9), and the vertical vibration makes it easy for the material attached to the filter screen (7) to fall off.

6. A feeding device for producing L-dihydrophenylglycine according to claim 1, characterized in that: The support member (8) is a metal mesh or a metal perforated plate.

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