A closed weighing system

Abstract

The present invention provides a closed weighing system, including a storage tank and a loss-in-weight scale. A discharge valve is provided at the discharge port of the storage tank, a removable material receiving barrel is provided below the discharge valve, and a connecting mechanism is used to seal and connect the discharge valve and the material receiving barrel; an electrostatic adsorption valve is provided on the second material pipe, and a valve plate is formed by a plurality of anode plates and a cylindrical frame arranged at intervals, all anode plates are fixed on the inner wall of the cylindrical frame, and the outer wall of the cylindrical frame is in clearance fit with the second material pipe. When the discharge valve is closed, the valve plate of the electrostatic adsorption valve flips to a horizontal state, and the electrostatic adsorption valve is energized; when the discharge valve is opened, the valve plate of the electrostatic adsorption valve flips to a vertical state, and the electrostatic adsorption valve is de-energized. The closed weighing system of the present invention is not only suitable for occasions where the material receiving barrel needs to be frequently transferred, but also the material receiving barrel can be removed at any time after the discharge valve is closed. Even for the weighing of ultra-light powder materials, the material receiving barrel can be removed immediately after the discharge is completed without standing and waiting.

Description

Technical Field

[0001] The invention belongs to the field of batching equipment, in particular to a closed batching system. Background Art

[0002] At present, when mixing materials (lightweight materials) such as powders and fiber materials that are easy to fly, it is usually necessary to do it in a closed environment to prevent the materials from contaminating the operating space. In the prior art, document CN210084466U provides a closed automatic metering feeding system for powders, including a feeding device, an automatic metering device, a powder recovery device, a stirring and mixing device, and an electric control device. The feeding device is connected to the automatic metering device and the powder recovery device respectively through a three-way valve, and the automatic metering device is connected to the stirring and mixing device; the feeding device is provided with a feeding silo, and a silo door is installed at the feeding port of the feeding silo. The discharge port of the feeding silo is connected to the three-way valve through a feeding pipe, and a powder pipeline flowmeter is installed on the feeding pipeline. A feeding discharge valve is installed at the discharge port of the feeding pipeline. The powder pipeline flowmeter and the feeding discharge valve are both electrically connected to the electric control device; the automatic metering device includes a metering device. The material silo and weighing frame, the metering silo is composed of a silo body and a metering silo cover plate, a weighing sensor is arranged between the silo body and the weighing frame, the weighing sensor is electrically connected to the electric control device, a feed pipe connected to the three-way valve is installed on the metering silo cover plate, a metering feed valve is installed on the feed pipe, a metering discharge valve is installed at the bottom of the silo body, and both the metering feed valve and the metering discharge valve are electrically connected to the electric control device; the powder recovery device is provided with a powder recovery silo, a recovery silo cover is installed on the top of the powder recovery silo, a powder recovery pipe is installed on the recovery silo cover plate, the powder recovery pipe is connected to the three-way valve, a powder recovery valve is installed on the powder recovery pipe, a discharge valve is installed at the bottom of the powder recovery silo, and both the powder recovery valve and the discharge valve are electrically connected to the electric control device. Although the feeding system can realize closed feeding, it is not suitable for occasions where the receiving barrel needs to be frequently transferred. In addition, when batching ultra-light powder, within a few minutes after the discharge valve is closed, the receiving barrel must be stationary for a period of time before it can be removed. Summary of the invention

[0003] In view of the problems existing in the background technology, the purpose of the present invention is to provide a closed weighing system.

[0004] In order to achieve the above object, the present invention adopts the following technical solution.

[0005] A closed weighing and proportioning system comprises a material storage tank and a weight loss scale arranged on the material storage tank, a discharge valve is arranged at the discharge port of the material storage tank, a removable material receiving cylinder is arranged below the discharge valve, and a connecting mechanism is used to seal and connect the discharge valve and the material receiving cylinder; the connecting mechanism comprises a material pipe 1 arranged at the outlet of the discharge valve, a material pipe 2 arranged on the cover of the material receiving cylinder, the material pipe 1 and the material pipe 2 are connected through a hose, a support is radially arranged on the outer wall of the material pipe 1, a ring plate is sleeved on the material pipe 2, a telescopic part is fixedly arranged on the support, and the telescopic rod of the telescopic part is connected to the ring plate; when weighing and discharging, the telescopic part The telescopic rod of the telescopic part is in an extended state, and the cover of the material receiving barrel is pressed onto the material receiving barrel; after the weighing and discharging is completed, the telescopic rod of the telescopic part retracts, and drives the cover of the material receiving barrel to separate from the material receiving barrel; an electrostatic adsorption valve is arranged on the second material pipe, and a valve plate is composed of a plurality of anode plates and a cylindrical frame arranged at intervals, all the anode plates are fixed on the inner wall of the cylindrical frame, and the outer wall of the cylindrical frame is in a clearance fit with the second material pipe. When the discharging valve is closed, the valve plate of the electrostatic adsorption valve flips to a horizontal state, and the electrostatic adsorption valve is energized; when the discharging valve is opened, the valve plate of the electrostatic adsorption valve flips to a vertical state, and the electrostatic adsorption valve is de-energized.

[0006] Preferably, the anode plate is a thin-walled stainless steel plate with a thickness of 0.5-2 mm.

[0007] Preferably, the thickness of the valve plate is 10-20 mm, and the gap between adjacent anode plates is 3-10 mm.

[0008] Furthermore, a stopper is radially arranged on the material pipe 2 located above the ring plate, and the ring plate is movably sleeved on the material pipe 2.

[0009] During the retraction of the telescopic rod of the telescopic part, the telescopic rod drives the ring plate to move upward, and after the ring plate abuts against the stopper, the second material pipe and the material receiving barrel cover move upward along with the telescopic rod.

[0010] Furthermore, the closed weighing and proportioning system also includes an operating platform, the loss-in-weight scale is arranged on the operating platform, and the material receiving cylinder is located below the operating platform.

[0011] Preferably, the telescopic part adopts a cylinder.

[0012] Preferably, the discharge valve is connected to a servo motor and driven by the servo motor.

[0013] Beneficial effects: The closed weighing and proportioning system of the present invention can not only realize the closed weighing and proportioning of powder materials and fiber materials, and is suitable for occasions where the material collecting barrel needs to be frequently transferred, but also the material collecting barrel can be removed at any time after the discharge valve is closed. Even for the weighing of ultra-light powder materials, the material collecting barrel can be removed immediately after the discharge is completed without standing still and waiting, which is beneficial to improving the efficiency of closed weighing and proportioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 11. It is a schematic diagram of the assembly of the closed weighing and matching system in the embodiment;

[0015] Figure 2 yes Figure 1 Enlargement of the A part Figure 1 (The valve plate is in a horizontal state);

[0016] Figure 3 yes Figure 2 Schematic diagram of the electrostatic adsorption valve in the state;

[0017] Figure 4 yes Figure 1 Enlargement of the A part Figure 2 (The valve plate is in a vertical position);

[0018] Figure 5 yes Figure 4 Schematic diagram of the electrostatic adsorption valve in the state (side view);

[0019] Figure 6 yes Figure 4 Schematic diagram of the electrostatic adsorption valve in the state (looking down). DETAILED DESCRIPTION

[0020] The following embodiments are only used to help understand the principle and core idea of ​​the present invention, and are not intended to limit the scope of protection of the present invention. It should be noted that for those skilled in the art, without departing from the principle of the present invention, improvements made to the present invention also fall within the scope of protection of the claims of the present invention. Example

[0021] See also Figure 1 and Figure 2A closed weighing system includes a storage tank 11 for storing materials and a loss-in-weight scale 9 arranged on the storage tank 11. The loss-in-weight scale 9 is installed on an operating platform 13 through a weighing base 10. The operating platform 13 is located on the upper part of a frame 1. Adjacent frames 1 are connected by a crossbeam 2. A ladder 4 is arranged on the periphery of the frame 1 to lead to the operating platform 13. A discharge valve 8 is arranged at the discharge port of the storage tank 11. A removable material receiving barrel 5 is arranged below the discharge valve 8. The material receiving barrel 5 is located below the operating platform 13. A connecting mechanism is used to seal and connect the discharge valve 8 with the material receiving barrel 5. The connecting mechanism includes a material pipe 1 65 arranged at the outlet of the discharge valve 8, a material pipe 2 63 arranged on the material receiving barrel cover 51, and the material pipe 1 65 is connected to the material pipe 2 63 through a hose 64. A support member 66 is radially arranged on the outer wall of the material pipe 1 65. A ring plate 61 is sleeved on the material pipe 2 63. A telescopic part is fixedly arranged on the support member 66. The telescopic rod 67 of the telescopic part is connected to the ring plate 61. When weighing and discharging, the telescopic rod 67 of the telescopic part is in an extended state, and the material receiving barrel cover 51 is pressed onto the material receiving barrel 5; after weighing and discharging, the telescopic rod 67 of the telescopic part is retracted, and the material receiving barrel cover 51 is driven to separate from the material receiving barrel 5; an electrostatic adsorption valve 12 is arranged on the second material tube 63, and a valve plate is formed by a plurality of spaced anode plates 123 and a cylindrical frame 121, all of the anode plates 123 are fixed on the inner wall of the cylindrical frame 121, the cylindrical frame 121 is adapted to the second material tube 63, and the outer wall of the cylindrical frame 121 is in a clearance fit with the second material tube 63. When the discharge valve 8 is closed, the valve plate of the electrostatic adsorption valve 12 is flipped to the position as shown in the figure. Figure 2 and Figure 3 When the electrostatic adsorption valve 12 is in the horizontal state shown in FIG. 1 , the electrostatic adsorption valve 12 is energized; when the discharge valve 8 is opened, the valve plate of the electrostatic adsorption valve 12 is turned over to the position shown in FIG. Figure 4 , Figure 5 and Figure 6 In the vertical state shown, the electrostatic adsorption valve 12 is de-energized.

[0022] In this embodiment, the anode plate 123 is a thin-walled stainless steel plate with a thickness of 0.5-2 mm, the valve plate thickness is 10-20 mm, and the gap between adjacent anode plates 123 is 3-10 mm. As for the thickness of the anode plate 123, theoretically, the smaller the better, provided that the electrostatic requirements are met. For fiber material weighing, the gap between adjacent anode plates 123 is set as wide as possible, such as 6-10 mm; for powder material weighing, the gap between adjacent anode plates 123 is set as narrow as possible, such as 0.5-5 mm.

[0023] In this embodiment, a stopper 62 is radially arranged on the material pipe 2 63 located above the ring plate 61, and the ring plate 61 is movably sleeved on the material pipe 2 63. During the retraction of the telescopic rod 67 of the telescopic part, the telescopic rod 67 drives the ring plate 61 to move upward. After the ring plate 61 is close to the stopper 62, the material pipe 2 63 and the material collecting barrel cover 51 move upward following the telescopic rod 67.

[0024] In this embodiment, the telescopic part adopts a cylinder.

[0025] In this embodiment, the discharge valve 8 is connected to the servo motor 7 and driven by the servo motor 7. The operating mechanism of the electrostatic adsorption valve 12 is also driven by the servo motor.

[0026] Usage and principle: Before weighing materials in a closed manner, the discharge valve 8 is in a closed state; when materials need to be weighed, first move the material collecting barrel 5 to the position directly below the discharge valve 8, then start the telescopic part, the telescopic rod 67 of the telescopic part extends downward, and then drives the material collecting barrel cover 51 to press against the material collecting barrel 5, and then open the electrostatic adsorption valve 12 to flip the valve plate to the position as shown in the figure. Figure 4 , Figure 5 and Figure 6 In the vertical state shown in the figure, the electrostatic adsorption valve 12 is not energized during this process, and then the discharge valve 8 is opened to discharge the material; when the weighed material reaches the predetermined amount, the discharge valve 8 is closed first, and then the valve plate of the electrostatic adsorption valve 12 is flipped to Figure 2 and Figure 3 The electrostatic adsorption valve 12 is in the horizontal state shown, and then the electrostatic switch of the electrostatic adsorption valve 12 is turned on to make the anode plate 123 generate a high-voltage electrostatic field. Under the action of high-voltage static electricity, the materials near the electrostatic adsorption valve 12 (including the materials floating under the valve plate) and the materials floating in the material pipe 63 are adsorbed on the anode plate 123, and then the receiving barrel 5 can be removed. Due to the use of the electrostatic adsorption valve 12, lightweight materials, especially ultra-light powders, will not float in the discharge channel, so that the receiving barrel 5 can be removed at any time after closing the discharge valve 8 without waiting, which is beneficial to improving the closed weighing efficiency. When the next stage of closed weighing of materials is carried out, the valve plate of the electrostatic adsorption valve 12 is driven to flip to the position as shown below before discharging. Figure 4 , Figure 5 and Figure 6 The vertical state shown in the figure, and the electrostatic adsorption valve 12 is powered off. During this process, the material adsorbed on the anode plate 123 first falls into the receiving barrel 5, and then the discharge valve 8 is opened to discharge the material.

Claims

1. A closed weighing system, comprising a storage tank (11) and a loss-in-weight scale (9) arranged on the storage tank (11), a discharge valve (8) being arranged at the discharge port of the storage tank (11), characterized in that: A removable material receiving barrel (5) is provided below the material discharging valve (8), and a connecting mechanism is used to seal and connect the material discharging valve and the material receiving barrel (5); the connecting mechanism comprises a material pipe (65) provided at the outlet of the material discharging valve (8), and a material pipe (63) provided on the material receiving barrel cover (51); the material pipe (65) and the material pipe (63) are connected via a hose (64); a support member (66) is radially provided on the outer wall of the material pipe (65); a ring plate (61) is sleeved on the material pipe (63); a telescopic part is fixedly provided on the support member (66); a telescopic rod (67) of the telescopic part is connected to the ring plate (61); when weighing and discharging, the telescopic rod (67) of the telescopic part is in an extended state, and the material receiving barrel cover (51) is pressed onto the material receiving barrel (5); weighing and discharging After the end, the telescopic rod (67) of the telescopic part retracts and drives the collecting barrel cover (51) to separate from the collecting barrel (5); an electrostatic adsorption valve (12) is arranged on the second material tube (63), and a valve plate is formed by a plurality of anode plates (123) and a columnar frame (121) arranged at intervals. All anode plates (123) are fixed on the inner wall of the columnar frame (121), and the outer wall of the columnar frame (121) and the second material tube (63) are in clearance fit. When the discharge valve (8) is closed, the valve plate of the electrostatic adsorption valve (12) is turned to a horizontal state, and the electrostatic switch of the electrostatic adsorption valve (12) is turned on to energize the electrostatic adsorption valve (12); when the discharge valve (8) is opened, the valve plate of the electrostatic adsorption valve (12) is turned to a vertical state, and the electrostatic adsorption valve (12) is turned off.

2. The closed weighing system according to claim 1, characterized in that: The anode plate (123) is made of a thin-walled stainless steel plate with a thickness of 0.5-2 mm.

3. The closed weighing system according to claim 2, characterized in that: The thickness of the valve plate is 10-20 mm, and the gap between adjacent anode plates (123) is 3-10 mm.

4. The closed weighing and matching system according to any one of claims 1 to 3, characterized in that: A stopper (62) is radially arranged on the second material pipe (63) located above the ring plate (61). The ring plate (61) is movably sleeved on the second material pipe (63). When the telescopic rod (67) of the telescopic portion is retracted, the telescopic rod (67) drives the ring plate (61) to move upward. After the ring plate (61) is close to the stopper (62), the second material pipe (63) and the material receiving barrel cover (51) move upward along with the telescopic rod (67).

5. The closed weighing system according to claim 4, characterized in that: The closed weighing and dispensing system further comprises an operating platform, a loss-in-weight scale (9) is arranged on the operating platform, and a material receiving barrel (5) is located below the operating platform (13).

6. The closed weighing system according to claim 5, characterized in that: The telescopic part adopts a cylinder.

7. The closed weighing system according to claim 6, characterized in that: The discharge valve (8) is connected to the servo motor (7) and driven by the servo motor (7).

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