Flexible connection for vacuum conveying of powders

Abstract

A kind of soft connection device for powder vacuum conveying, soft connection cloth bag is supported by the combination of internal embedded groove support ring and external fastening clamp to realize vertical support, and a certain amount of shrinkage function can be realized in support area. The soft connection device solves the problem that the powder cannot be directly fed into the final weighing hopper under vacuum negative pressure condition, controls the whole screening process of the powder under negative pressure condition, reduces the dust concentration on site, improves the operation efficiency and reduces the occupational health hazards to human body.

Description

Technical Field

[0001] This invention relates to a flexible connection device for vacuum conveying of powder materials, belonging to the technical field of auxiliary equipment for powder conveying. Background Technology

[0002] In the solid propellant industry, the first process often involves the pretreatment of a large amount of raw materials. Among them, aluminum powder, a raw material used in large quantities and posing a high risk to human health, presents challenges in pretreatment. These challenges include high intensity, long processing time, and workers having to hold vacuum suction heads and sieve the aluminum powder face-to-face for extended periods. Furthermore, the frequent replacement of aluminum powder ton bags requires hoisting operations, and the number of personnel on site cannot be reduced to a minimum. This production situation reduces the overall efficiency of the process, and occupational health problems are particularly serious under this material pretreatment. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a soft connection device for vacuum conveying of powder so that aluminum powder can be directly fed into the weighing hopper during vacuum negative pressure sieving and conveying. This device connects the buffer tank and the weighing hopper, enabling aluminum powder to be conveyed in one step under negative pressure. This removes workers from the time-consuming and high-intensity raw material processing steps, improves production efficiency, and reduces occupational health hazards.

[0004] The technical solution of this invention is:

[0005] A flexible connection device for vacuum conveying of powder materials includes: an inner fire-fighting filter bag, a fastening clamp, a grooved support ring, and an outer fire-fighting filter bag;

[0006] The grooved support ring is used to support the inner fire filter bag. The inner fire filter bag is supported by three grooved support rings evenly distributed at the top, middle and bottom positions. The grooved support ring is located inside the inner fire filter bag and is fixed by fastening clamps located at corresponding positions on the outside of the inner fire filter bag. The inner fire filter bag is also covered by an outer fire filter bag, which isolates all the fastening clamps inside the outer fire filter bag.

[0007] Furthermore, the grooved support ring has a ring-shaped structure, and an annular groove is provided on the outer side of the ring-shaped structure.

[0008] Furthermore, the fastening clamp is completely and tightly fitted with the annular groove of the grooved support ring by screws.

[0009] Furthermore, the tight fit between the fastening clamps and the grooved support rings allows the fire filter bag to have a certain amount of room for contraction, ensuring the normal operation of the lifting cylinder that it is paired with.

[0010] Furthermore, both the inner and outer fire-fighting filter bags are replaceable.

[0011] Furthermore, the spacing between the three grooved support rings is 350mm.

[0012] Furthermore, the fire tarpaulin bag is 1mm thick and 350mm in diameter.

[0013] Furthermore, the outer diameter of the grooved support ring is 350mm, which fully supports the fire bag, and the inner diameter of the fastening clamp is 345mm when it is not under stress.

[0014] The advantages of this invention compared to the prior art are:

[0015] (1) The present invention can effectively solve the problem that aluminum powder screening and conveying needs to be completed in two stages, improve the efficiency of this step, realize the one-step screening and conveying of aluminum powder, and avoid the occupational health hazards of long-term aluminum powder screening.

[0016] (2) This invention solves the semi-automatic operation that requires two separate operations from feeding the material to entering the weighing hopper when sieving aluminum powder;

[0017] (3) The present invention achieves a full-process vacuum negative pressure condition during aluminum powder sieving, thereby improving the sieving efficiency of aluminum powder.

[0018] (4) The full-process vacuum negative pressure state avoids excessive dust concentration at the work site and ensures the occupational health of personnel;

[0019] (5) The flexible connection device is placed in the aluminum powder automated processing system, making the overall operation more convenient, greatly reducing the labor intensity of operators, reducing the number of on-site personnel to a minimum, making the production rhythm more compact, and making the division of labor more reasonable. Attached Figure Description

[0020] Figure 1 This is the assembly drawing of the flexible connection device;

[0021] Figure 2 This is a schematic diagram of a clamp that serves a fastening function;

[0022] Figure 3 This is a schematic diagram of a grooved support ring installed inside a fire extinguisher bag.

[0023] In the picture: 1. Fire bag; 2. Fastening clamp; 3. Grooved support ring. Detailed Implementation

[0024] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0025] To improve production efficiency, enhance aluminum powder pretreatment methods, and reduce the number of on-site personnel, the entire manual pretreatment process for aluminum powder is replaced with an automated pretreatment mode. This involves using the principle of vacuum conveying of powder, with the help of an automated aluminum powder processing system, to automatically transport aluminum powder through a vacuum conveying pipeline to a buffer tank. A section of inclined chute connects the buffer tank to the weighing hopper related to material feeding, and the material feeding and discharging are completed in two stages to handle the material volume for each batch.

[0026] To avoid dust pollution, aluminum powder needs to be transported under vacuum conditions. However, the inclined chute does not have vacuum conditions, so it cannot allow the aluminum powder to enter the weighing hopper directly from the suction. Therefore, the aluminum powder enters the weighing hopper under positive pressure, resulting in serious dust pollution on site.

[0027] Therefore, the present invention uses an intermediate connecting device to connect the buffer tank and the weighing hopper, and meets the vacuum negative pressure conveying conditions, thereby improving the efficiency of aluminum powder pretreatment, avoiding dust flying on site, and simplifying the intermediate steps of pretreatment.

[0028] Specifically, such as Figure 1 As shown, the present invention proposes a flexible connection device for vacuum conveying of powder materials, comprising: an inner fire-fighting bag 1, a fastening clamp 2, a grooved support ring 3, and an outer fire-fighting bag;

[0029] The grooved support ring 3 is used to support the inner fire filter bag 1. The inner fire filter bag 1 is supported by three grooved support rings 3 evenly distributed at the upper, middle and lower positions. The grooved support ring 3 is located inside the inner fire filter bag 1 and is fixed by fastening clamps 2 located at corresponding positions on the outside of the inner fire filter bag 1. The inner fire filter bag 1 is also covered by an outer fire filter bag, which isolates all the fastening clamps 2 inside the outer fire filter bag.

[0030] like Figure 3 As shown, the grooved support ring 3 is a ring structure, and an annular groove is provided on the outer side of the ring structure.

[0031] like Figure 2 and Figure 3 As shown, the fastening clamp 2 is completely and tightly fitted with the annular groove of the grooved support ring 3 by means of screws.

[0032] The fastening method of the fastening clamp 2 and the grooved support ring 3 allows the fire bag to have a certain amount of shrinkage, which can ensure the normal use of the lifting cylinder that it is paired with.

[0033] Preferably, both the inner and outer fire-fighting filter bags are replaceable.

[0034] Preferably, the spacing between the three grooved support rings 3 is 350mm.

[0035] Preferably, the fire tarpaulin bag is 1mm thick and 350mm in diameter.

[0036] Preferably, the outer diameter of the grooved support ring is 350mm, which fully supports the fire bag, and the inner diameter of the fastening clamp is 345mm when it is not under stress.

[0037] Example:

[0038] This embodiment is a flexible connection device for powder conveying under vacuum conditions. The flexible connection device includes a fire-fighting bag 1, a fastening clamp 2, and a grooved support ring 3. The fire-fighting bag 1 is installed by the fastening clamp 2 and the grooved support ring 3, which are installed inside and out to achieve the vertical support of the soft material of the fire-fighting bag. Due to the requirements of the application scenario for excess material, another layer of fire-fighting bag needs to be wrapped around this device to prevent the screws on the fastening clamp from falling out of the device. The fire-fighting bag is fixed by 3 fastening devices, each of which is 350mm apart. The fire-fighting bag is 1mm thick and about 350mm in diameter. To achieve the best fastening effect, the outer diameter of the grooved support ring is 350mm to fully support the fire-fighting bag. The inner diameter of the fastening clamp is 345mm when it is not under stress. The screws are fully and tightly fitted with the groove of the grooved support ring to avoid the phenomenon of unreliable fixation.

[0039] In this embodiment, the grooved support rings primarily serve to support the fire hood. The fire hood is evenly distributed at the top, middle, and bottom positions by three grooved support rings. These rings are located inside the fire hood and are secured by corresponding fastening clamps located outside the fire hood. This fastening method allows for a certain amount of retraction of the fire hood, ensuring the normal operation of the associated lifting cylinder.

[0040] Firefighting filter bags have a long service life and, to avoid clutter, the inner firefighting filter bag is wrapped by the outer firefighting filter bag, isolating all metal components such as fastening clamps inside the filter bag.

[0041] Firefighting tarpaulins are equipped with spare parts to avoid production delays.

[0042] This invention effectively solves the problem that aluminum powder screening and conveying needs to be completed in two stages, improves the efficiency of this step, realizes aluminum powder screening and conveying in one step, and avoids the occupational health hazards of prolonged aluminum powder screening.

[0043] The parts of this invention not described in detail are common knowledge to those skilled in the art.

Claims

1. A flexible connection device for vacuum conveying of powder, characterized in that... include: Inner fire-fighting cloth bag (1), fastening clamp (2), grooved support ring (3) and outer fire-fighting cloth bag; The grooved support ring (3) is used to support the inner fire liner (1). The inner fire liner (1) is supported by three grooved support rings (3) evenly distributed at the top, middle and bottom positions. The grooved support ring (3) is located inside the inner fire liner (1) and is fixed by fastening clamps (2) located at the corresponding positions outside the inner fire liner (1). The inner fire liner (1) is also covered by an outer fire liner, which isolates all the fastening clamps (2) inside the outer fire liner. The grooved support ring (3) has a ring-shaped structure with an annular groove on its outer side; the fastening clamp (2) and the grooved support ring (3) are fastened together so that the fire bag has a certain amount of shrinkage, which can ensure the normal use of the lifting cylinder; the distance between the three grooved support rings (3) is 350mm; The fastening clamp (2) is completely and tightly fitted with the annular groove of the grooved support ring (3) by screws; Both the inner and outer fire-fighting tarpaulins are replaceable.

2. The flexible connection device for vacuum conveying of powder materials according to claim 1, characterized in that: The fire-fighting tarpaulin bag is 1mm thick and 350mm in diameter.

3. The flexible connection device for vacuum conveying of powder materials according to claim 1, characterized in that: The outer diameter of the grooved support ring is 350mm, which fully supports the fire bag. The inner diameter of the fastening clamp is 345mm when it is not under stress.

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