Powder moisture-proof feeding assembly

Abstract

The utility model provides a powder moistureproof feeding assembly belongs to sewage treatment technical field. The powder moistureproof feeding assembly is set in the front end of powder feeding pipe, include: drive rod, open and close cover and closing plate, along drive rod axial, open and close cover is fixedly connected with closing plate at one end, is centrally bored in the other end and is equipped with follow -up nut, open and close cover has open state and closed state, in closed state, closing plate is separated with the wall of powder feeding pipe, and follow -up nut is connected with drive rod screw joint and adjusts the interval of closing plate and the wall of powder feeding pipe. The utility model discloses when need to add medicine powder, open the feeding opening and feed, close the feeding opening after dosing, ensure that the medicine powder in the feeding assembly is isolated with water vapor in the non - medicine time period, avoid that medicine powder is damped and blocks the feeding opening.

Description

Technical Field

[0001] This utility model relates to a powder moisture-proof feeding component, belonging to the field of wastewater treatment technology. Background Technology

[0002] Wastewater treatment plants commonly use polyacrylamide as a flocculant to cause sludge in wastewater to flocculate and settle. To improve the efficiency of flocculant preparation, researchers designed an automatic dissolving machine that can prepare polyacrylamide powder into an aqueous solution of a specific concentration. According to the design requirements, the automatic dissolving machine should not only automatically add the flocculant and water according to the specified ratio, ultimately preparing a solution of the required concentration, but also automatically detect, alarm, shut down, and resume operation under conditions such as water outages, flocculant outages, power outages, high / low liquid levels, and high / low powder levels. However, existing automatic dissolving machines still have some problems in use, resulting in unstable flocculant preparation.

[0003] One problem with automatic dissolving machines for flocculants is due to the following characteristics of polyacrylamide powder: Polyacrylamide powder clumps when exposed to humid air, especially adhering to the container edges. Automatic dissolving machines typically have a structure with the feeding assembly on top and the dissolving tank below. The powder falls from the feeding assembly's inlet under gravity into the dissolving tank. In this structure, moisture easily adheres to the powder at the inlet, causing it to clump and stick to the container walls. Over long-term operation, moisture gradually seeps into the feeding assembly, causing blockages throughout the machine. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model proposes a powder moisture-proof feeding component. When powder needs to be added, the feeding port is opened for feeding, and the feeding port is closed after the powder is added. During non-powdering periods, the powder in the feeding component is kept isolated from moisture, preventing the powder from becoming damp and clogging the feeding port and the feeding component.

[0005] This utility model relates to a powder moisture-proof feeding component, which is set at the front end of the powder feeding pipe. The powder feeding pipe is provided with a feeding screw and includes: a drive rod, an opening and closing cover and a closing plate.

[0006] Along the axial direction of the drive rod, the opening and closing cover is fixedly connected to the closing plate at one end, and has a central hole at the other end with a follower nut corresponding to the drive rod. The drive rod, the opening and closing cover and the follower nut are coaxially arranged.

[0007] The opening and closing cover has an open state and a closed state; in the closed state, the closing plate abuts against the wall of the powder feeding pipe, and the discharge port is closed; in the open state, the closing plate separates from the wall of the powder feeding pipe, the discharge port is opened, and the follower nut is screwed to the drive rod to adjust the distance between the closing plate and the wall of the powder feeding pipe.

[0008] Compared with the prior art, the present invention has the following technical effects:

[0009] When the drive rod rotates forward, the opening and closing cover opens synchronously, thus opening the feeding port; when the drive rod rotates backward, the opening and closing cover closes synchronously, thus closing the feeding port. During non-dosing periods, this ensures that the powder in the feeding component is isolated from moisture, preventing the powder from getting damp and clogging the feeding port or even the inside of the feeding component. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the automatic dissolving machine in an embodiment of the present invention;

[0011] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0012] Figure 3 This is a schematic diagram of the opening and closing cover in the closed state in an embodiment of this utility model;

[0013] Figure 4 This is a schematic diagram of the opening and closing cover in an embodiment of the present invention, showing the cover in a partially closed state.

[0014] Figure 5 for Figure 4 Sectional view along the BB direction;

[0015] In the diagram: 100, drive rod; 101, threaded area; 200, opening and closing cover; 300, closing plate; 400, follower nut; 500, powder feeding pipe; 501, feeding screw; 600, support component; 701, first return spring pin; 702, second return spring pin; 800, dissolving tank. Detailed Implementation

[0016] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be noted that in specific embodiments, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly defined, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] like Figures 1 to 3 As shown, this utility model embodiment relates to a powder moisture-proof feeding component, including: a drive rod 100, an opening and closing cover 200, and a closing plate 300;

[0018] Along the axial direction of the drive rod 100, the opening and closing cover 200 is fixedly connected to the closing plate 300 at one end, and has a central hole at the other end and a follower nut 400 corresponding to the drive rod 100. The drive rod 100, the opening and closing cover 200 and the follower nut 400 are coaxially arranged.

[0019] The opening and closing cover 200 has an open state and a closed state; in the closed state, the closing plate 300 abuts against the wall of the powder feeding pipe 500, and the discharge port is closed; in the open state, the closing plate 300 separates from the wall of the powder feeding pipe 500, the discharge port is opened, and the follower nut 400 is screwed to the drive rod 100 to adjust the distance between the closing plate 300 and the wall of the powder feeding pipe 500.

[0020] The drive rod 100 and the feeding screw 501 are coaxially arranged. In some preferred embodiments, the two are manufactured by an integral molding process or welded together. Driven by the servo motor of the feeding screw 501, the two rotate synchronously, thus eliminating the need to configure an additional power source for the drive shaft.

[0021] Preferably, the feeding screw 501 is provided with a support member 600; the support member 600 is slidably connected to the inner wall of the opening and closing cover 200 to reduce the frictional force of the axial movement of the opening and closing cover 200. More preferably, the support member 600 is a nylon bearing.

[0022] For some preferred embodiments, corresponding to the maximum axial stroke of the opening and closing cover 200, the drive rod 100 is provided with a thread corresponding to the stroke, which is a threaded area 101, and the two ends of the threaded area 101 are smooth rod areas; the support member 600 is provided with a first return spring pin 701 corresponding to the closing plate 300, and a second return spring pin 702 corresponding to the opening and closing cover 200.

[0023] The first return spring pin 701 is positioned away from the follower nut 400 and abuts against the closing plate 300 when the opening and closing cover 200 is fully open.

[0024] The second return spring pin 702 is positioned close to the follower nut 400 and abuts against the inner wall of the opening and closing cover 200 when the opening and closing cover 200 is fully closed. By setting the return spring pin, when the material outlet is fully open or fully closed, the follower nut 400 on the opening and closing cover 200 is disengaged from the thread and rotates freely, which facilitates the switching of the rotation direction to change the opening and closing state of the material outlet. Once the drive rod 100 changes the rotation direction, the follower nut 400 is immediately pushed into the thread and moves in a straight line by the return spring pin.

[0025] Preferably, the first return spring pin 701 and the second return spring pin 702 are both composed of a pin and a spring; the support member 600 is provided with a plurality of grooves, and the first return spring pin 701 and the second return spring pin 702 are respectively disposed in the corresponding grooves, and the pin and the groove are connected by a spring.

[0026] In some preferred embodiments, the closing plate 300 is provided with two symmetrical pieces along a radial direction perpendicular to the feeding direction, such as... Figure 4 and Figure 5 As shown; for each closed plate 300, at least one first return spring pin 701 is provided. Preferably, the second return spring pin 702 and the first return spring pin 701 are arranged one-to-one in the direction of movement of the opening and closing cover, with their axes coinciding, so that the opening and closing cover 200 can be given a uniform thrust so that the follower nut 400 can smoothly cut into the threaded area 101 of the drive rod 100.

[0027] The workflow of this embodiment is as follows: When the automatic dissolving machine needs to add medicine powder, the feeding screw 501 rotates forward, and the drive rod 100 rotates synchronously. The medicine powder is pushed by the feeding screw 501 to the discharge port at the front end of the powder feeding pipe 500, and finally falls into the dissolving tank 800. During the feeding process described above, under the thrust of the second return spring pin 702, the follower nut 400 on the opening and closing cover 200 cuts from the smooth rod area of ​​the drive rod 100 into the threaded area 101. The drive rod 100, which rotates coaxially with the feeding screw 501, drives the follower nut 400 to move linearly, thereby causing the opening and closing cover 200 to move linearly along the axis of the drive rod 100. This causes the closing plate 300, which is in contact with the wall of the powder feeding pipe 500, to release from contact and gradually move away until the discharge port is fully open. When the discharge port is fully open, the first return spring pin 701 abuts against the closing plate 300, and the follower nut 400 completely disengages from the threaded area 101 on the drive rod 100, and begins to idle in the smooth rod area of ​​the drive rod 100, allowing the automatic dissolving machine to continuously feed materials.

[0028] When the feeding reaches the set amount, the automatic dissolving machine stops feeding, and the feeding screw 501 stops rotating forward and starts rotating in reverse. At this time, under the thrust of the first return spring 701, the follower nut 400 on the opening and closing cover 200 cuts into the threaded area 101 of the drive rod 100 and moves with it until the closing plate 300 abuts against the wall of the powder feeding pipe 500, and the discharge port is completely closed. The second return spring 702 abuts against the inner wall of the opening and closing cover 200, and the follower nut 400 enters the smooth rod area on the drive rod 100 and starts to rotate idling, waiting for the next feeding.

[0029] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A powder moisture-proof feeding assembly, disposed at the front end of a powder feeding pipe, wherein a feeding screw is provided in the powder feeding pipe, characterized in that, include: Drive rod, opening and closing cover, and closing plate; Along the axial direction of the drive rod, the opening and closing cover is fixedly connected to the closing plate at one end, and has a central hole at the other end with a follower nut corresponding to the drive rod. The drive rod, the opening and closing cover and the follower nut are coaxially arranged. The opening and closing hood has an open state and a closed state; in the closed state, the closing plate abuts against the wall of the powder feeding pipe, and the discharge port is closed; in the open state, the closing plate is separated from the wall of the powder feeding pipe, and the follower nut is screwed to the drive rod to adjust the distance between the closing plate and the wall of the powder feeding pipe.

2. The powder moisture-proof feeding assembly according to claim 1, characterized in that, The drive rod and the feeding screw are coaxially arranged and fixedly connected.

3. The powder moisture-proof feeding assembly according to claim 2, characterized in that, The drive rod and the feeding screw are integrally formed or welded together.

4. The powder moisture-proof feeding assembly according to claim 1, characterized in that, The feeding screw is equipped with a support member.

5. The powder moisture-proof feeding assembly according to claim 4, characterized in that, The support component is a nylon bearing.

6. The powder moisture-proof feeding assembly according to claim 4, characterized in that, Corresponding to the maximum axial stroke of the opening and closing cover, the drive rod is provided with a thread corresponding to the stroke, and the two ends of the thread are smooth rod areas.

7. The powder moisture-proof feeding assembly according to claim 6, characterized in that, The support member is provided with a first return spring pin corresponding to the closing plate and a second return spring pin corresponding to the opening and closing cover. The first return spring pin is positioned away from the follower nut and abuts against the closing plate when the opening and closing cover is fully open. The second return spring pin is located near the follower nut and abuts against the inner wall of the opening and closing cover when the cover is fully closed.

8. The powder moisture-proof feeding assembly according to claim 7, characterized in that, Both the first and second return spring pins are composed of pins and springs.

9. The powder moisture-proof feeding assembly according to claim 7, characterized in that, Along the radial direction perpendicular to the feeding direction, two symmetrical closing plates are provided; for each closing plate, at least one first return spring pin is provided.

10. The powder moisture-proof feeding assembly according to claim 9, characterized in that, The second return spring pin and the first return spring pin are arranged in a one-to-one correspondence along the direction of movement of the opening and closing cover, and their axes coincide.

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