High-precision speed-adjustable weighing hopper

Abstract

The utility model discloses a high-precision speed-adjustable weighing hopper which comprises a hopper body, a cover plate is arranged at the top of the hopper body, a through hole for feeding is formed in the middle of the cover plate, a connecting part is arranged on the side face of the top of the hopper body, and the hopper body is connected with a supporting rod on an external weighing device through the connecting part. The feeding pipe I and the feeding pipe II are arranged at the bottom of the hopper body and communicated with the interior of the hopper body, the diameter of the feeding pipe II is smaller than that of the feeding pipe I, an automatic throttling valve is arranged on a pipeline of the feeding pipe I, and an electric screw valve is arranged on a pipeline of the feeding pipe II. And the automatic throttle valve and the electric screw valve are connected with a control system. The feeding pipe I and the feeding pipe II which are different in diameter are arranged on the feeding hopper body, and the automatic throttling valve and the electric screw valve are arranged on the feeding pipe I and the feeding pipe II respectively, so that fine adjustment of the flowing-out speed of materials is achieved, and a smaller flow adjusting range and higher weighing precision are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of chemical batching weighing, and more specifically, particularly relates to a high-precision adjustable-speed weighing hopper. Background Art

[0002] As a key device for material processing and precise metering, the weighing hopper is applied to the high-precision chemical batching production in the aerospace and military industries. Among them, especially for the viscous fluid materials in chemical raw materials, during the feeding process, the adhesion of the materials causes inaccurate feeding. Therefore, in the scenarios where high-precision and adjustable-speed material metering are required, the traditional weighing hopper cannot achieve functions such as high precision and adjustable speed.

[0003] For example, an electro-hydraulic weighing funnel disclosed in patent number CN202020568544.9 can quickly discharge the materials inside the funnel when the funnel valve is opened during the discharging process. However, when it comes to the scenarios where precise feeding ratio of chemical raw materials and the like is required, this device cannot meet the scenarios of large-flow rapid discharging and small-flow precise metering. Summary of the Utility Model

[0004] An object of the utility model is to solve at least the above problems and / or defects, and provide at least the advantages described hereinafter.

[0005] To achieve these objects and other advantages according to the utility model, a high-precision adjustable-speed weighing hopper is provided, which includes a hopper body. A cover plate for closing the hopper body is arranged at the top of the hopper body. A through hole for feeding is opened in the middle of the cover plate. Connecting parts extending outward are arranged around the top of the hopper body. The hopper body is connected to a support rod on an external weighing device through the connecting parts.

[0006] It further includes: a feeding pipe I and a feeding pipe II which are arranged at the bottom of the hopper body and are communicated with the inside of the hopper body;

[0007] Among them, the diameter of the feeding pipe II is smaller than that of the feeding pipe I. An automatic throttle valve is arranged on the pipeline of the feeding pipe I, and an electric screw valve is arranged on the pipeline of the feeding pipe II. The automatic throttle valve and the electric screw valve are in communication connection with an external control end.

[0008] Preferably, the inner surface of the hopper body is sprayed with an anti-bonding coating.

[0009] Preferably, it further includes: a heat preservation jacket which is arranged outside the hopper body and fits with it.

[0010] Preferably, a feeding needle head is detachably connected to the front end of the electric screw valve.

[0011] Preferably, the hopper body is conical in structure in space.

[0012] The utility model has at least the following beneficial effects: By arranging the feeding pipes I and II with different diameters on the hopper body, and respectively configuring automatic throttle valves and electric screw valves on these pipelines, the fine adjustment of the material outflow speed is realized. Ensuring a smaller flow adjustment range and higher accuracy.

[0013] Other advantages, objectives and features of the utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 is a schematic diagram of the connection between the hopper body and an external weighing device;

[0016] Figure 3 is a schematic diagram of the connection between the hopper body and an external weighing device;

[0017] Figure 4 is a sectional view of the hopper body.

[0018] Reference numerals in the figures: 1, hopper body; 2, cover plate; 3, through hole; 4, connecting part; 5, weighing device; 51, support rod; 6, feeding pipe I; 61, automatic throttle valve; 7, feeding pipe II; 71, electric screw valve; 8, heat preservation jacket; 9, feeding needle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The following further detailed description of the utility model is made in conjunction with the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0020] It should be understood that the terms such as "having", "including" and "comprising" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0021] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, an electrical connection or a communication connection, it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In addition, in the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on the top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under the bottom of" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0024] As Figure 1 shown, a high-precision adjustable-speed weighing hopper includes a hopper body 1. A cover plate 2 for closing the hopper body 1 is provided at the top of the hopper body 1. A through hole 3 for the feeding end of the feeding device to feed is opened in the middle of the cover plate 2. A connecting portion 4 extending outward is provided around the top of the hopper body 1. The hopper body 1 is connected to a support rod 51 on an external weighing device 5 through the connecting portion 4;

[0025] It further includes: a feeding pipe I 6 and a feeding pipe II 7 which are arranged at the bottom of the hopper body 1 and communicate with the inside of the hopper body 1;

[0026] Among them, the diameter of the feeding pipe II 7 is smaller than that of the feeding pipe I 6. An automatic throttle valve 61 is arranged on the pipeline of the feeding pipe I 6, and an electric screw valve 71 is arranged on the pipeline of the feeding pipe II 7. The automatic throttle valve 61 and the electric screw valve 71 are connected to a control system.

[0027] Working principle:

[0028] During the working process, the feeding device adds materials into the hopper body 1 through the through hole 3 at the top of the cover plate 2. The hopper body 1 is connected to the support rod 51 on the external weighing device 5 through the connecting part 4, and the hopper body 1 is fixedly connected to the external weighing device 5. A feeding hole is provided on the weighing device 5 for the feeding pipe I 6 and the feeding pipe II 7 on the hopper body 1 to extend out, and the weight of the materials in the hopper can be detected in real time. The weighing hopper is provided with a feeding pipe I 6 at the bottom. The control system controls the automatic throttle valve 61 on the feeding pipe I 6 to open (wherein, the automatic throttle valve is configured as any one of an electric throttle valve, a pneumatic throttle valve and a hydraulic throttle valve). The feeding pipe I 6 conducts rough feeding into the mixing container. During the feeding process, the external weighing device 5 weighs in real time. When the rough feeding reaches 99.4% of the preset value, the control system controls the automatic throttle valve 61 to close. At the same time, the control system controls the electric screw valve 71 on the feeding pipe II 7 to open, and the feeding pipe II 7 conducts fine feeding into the mixing container. When the fine feeding reaches 99.94% of the preset value, the electric screw valve 71 switches to the titration mode to directly titrate and feed into the mixing container. Here, the electric screw valve is a precision electric screw valve, which can be adjusted at 1-100 revolutions per minute, and the specification of the electric screw valve can be selected according to actual needs to achieve 0.03-0.14 ml of materials per revolution (drop). Until the feeding reaches 100% of the predetermined feeding amount, the control system closes the electric screw valve 71 to complete the final feeding. By providing feeding pipes I 6 and feeding pipes II 7 with different diameters on the lower hopper body 1, and respectively configuring an automatic throttle valve 61 and an electric screw valve 71 on these pipelines, fine adjustment of the material outflow speed is achieved, ensuring a smaller flow adjustment range and higher accuracy.

[0029] In the above technical solution, the inner surface of the hopper body 1 is sprayed with an anti-adhesion coating. With this technical solution, the anti-adhesion coating has excellent anti-adhesion, wear resistance and corrosion resistance, which can ensure that the materials flow smoothly during the flowing process, and avoid the formation of hard-to-remove accumulated materials on the wall surface of the hopper body 1. This not only helps to keep the inside of the hopper clean, reduces the workload of cleaning and maintenance, but also ensures the accuracy of each weighing, and avoids errors caused by material residues.

[0030] In the above technical solution, it further includes: a heat preservation jacket 8 arranged outside the hopper body 1 and attached to it. With this technical solution, the heat preservation jacket 8 can effectively reduce the heat exchange between the hopper body 1 and the external environment, keep the temperature of the materials inside the hopper stable, and prevent heat loss.

[0031] In the above technical solution, a feeding needle head 9 is detachably connected to the front end of the electric screw valve 71. With this technical solution, since the diameter of the feeding pipe at the front end of the electric screw valve 71 is relatively thin and is prone to blockage, it is designed as a quick-release structure, and a standard disposable needle head is selected. It can be quickly replaced after feeding, which improves the work efficiency and has a relatively low use cost.

[0032] In the above technical solution, the hopper body 1 has a conical structure in space. With this technical solution, the hopper body 1 adopts a conical structure, which improves the fluidity of chemical materials inside the hopper and reduces the residue of chemical materials.

[0033] Although the embodiments of the present utility model have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present utility model. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the illustrated examples here.

Claims

1. A high-precision adjustable-speed weighing hopper, comprising a hopper body, wherein a cover plate for closing the hopper body is arranged at the top of the hopper body, and a through hole for feeding is formed in the middle of the cover plate, and it is characterized in that, A connecting part extending outwards is arranged around the top of the hopper body, and the hopper body is connected to the support rod on the external weighing device through the connecting part; It further includes: a feeding pipe I and a feeding pipe II which are arranged at the bottom of the hopper body and communicate with the inside of the hopper body; Wherein, the diameter of the feeding pipe II is smaller than that of the feeding pipe I, an automatic throttle valve is arranged on the pipeline of the feeding pipe I, an electric screw valve is arranged on the pipeline of the feeding pipe II, and the automatic throttle valve and the electric screw valve are connected to the control system.

2. The high-precision adjustable-speed weighing hopper according to claim 1, wherein, The inner surface of the hopper body is sprayed with an anti-adhesion coating.

3. The high-precision adjustable-speed weighing hopper according to claim 1, wherein It further includes: A heat preservation jacket which is arranged outside the hopper body and fits with it.

4. The high-precision adjustable-speed weighing hopper according to claim 1, wherein A feeding needle head is detachably connected to the front end of the electric screw valve.

5. The high-precision adjustable-speed weighing hopper according to claim 1, wherein The hopper body is in a conical structure in space.

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