Peristaltic pump vacuum pouring device for high-viscosity energetic fluid

Abstract

The invention discloses a peristaltic pump vacuum pouring device for high-viscosity energetic fluid. The peristaltic pump vacuum pouring device comprises a hopper assembly, a peristaltic pump, a vacuum pump, a pouring cylinder assembly and a pipeline assembly. The hopper assembly and the pouring cylinder assembly are communicated through a pouring pipeline in the pipeline assembly, and the peristaltic pump is arranged in the middle of the pipeline between the hopper assembly and the pouring cylinder assembly and used for conveying and controlling energetic materials. The hopper assembly and the pouring cylinder assembly are communicated through a constant pressure pipe in the pipeline assembly and connected with a vacuum pump, and the vacuum pump is used for providing a vacuum environment for the whole pouring environment. Compared with the prior art, by introducing the peristaltic pump and the constant-pressure pipe to communicate the hopper with the pouring cylinder and introducing external water with temperature into the space between the inner-layer cylinder body and the outer-layer cylinder body, the pouring efficiency can be improved, the filling density can be improved, and the pouring quality can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum casting, and particularly relates to a peristaltic pump vacuum casting device for highly viscous energetic fluids. Background Art

[0002] At present, there are many varieties and large batches of energetic fluids, and negative pressure vacuum casting is mostly used in production. However, there are still some drawbacks in this casting method. On the one hand, due to the limitations of the negative pressure vacuum casting method, the casting process is complex in operation, with low automation and unable to achieve continuous production. On the other hand, there is still the "manual face-to-face" operation in the production casting process of energetic fluids: the operator controls the feed valve and observes at the casting station. During the casting process of multiple products at multiple stations, each station requires someone to be on duty for feeding, discharging, observing and adjusting the valve. This personnel-intensive "manual face-to-face" operation method has a large labor intensity, high safety risks and low production efficiency. At the same time, the volatile gases of energetic fluids are toxic and harmful to the human body, and the "manual face-to-face" operation is prone to cause major safety accidents at the casting site. Despite the high production risks, the production tasks of energetic fluids are still increasing rapidly. Due to the characteristics of large quantity and complex structure in the production of energetic fluids, a large number of personnel are required for on-site operation during the casting process, with extremely high safety risks, which puts forward higher requirements for the manufacturing technology of energetic fluids.

[0003] Moreover, the common casting methods for highly viscous energetic fluids (referring to energetic fluids with a viscosity greater than 1500000 cps (centipoise·second)) mainly rely on the self-weight of the energetic fluid and the pressure difference between the upper and lower parts of the energetic fluid to achieve casting. The casting outlet flow rate is small, the efficiency is low, and there is no external force acting on the energetic fluid during the casting process, and the fluid accumulates freely, resulting in a low packing density and affecting the performance after forming. Due to the particularity of highly viscous energetic fluids, existing equipment suitable for the transportation of highly viscous fluids, such as gear pumps, centrifugal pumps, screw pumps, etc., are not applicable to the casting of highly viscous energetic fluids. The reason is that, on the one hand, there is a great safety hazard due to the dispersion of the fluid in the extrusion cavity and direct contact with the flow-through components during the transportation process. On the other hand, in the pipeline transportation scenario, highly viscous energetic materials are prone to cause pipeline blockage or pipe wall scaling due to adhesion, suspension sedimentation, etc., reducing the efficiency of transporting materials. In addition, it is easy to cause product contamination when switching product production, which is not conducive to fluid casting and quality assurance. When cleaning, the structure is complex, the disassembly and assembly are difficult, and the cleaning difficulty is increased.

[0004] The above problems are basically common problems existing in the casting production of highly viscous energetic fluids. To achieve safe production, stable quality, and improved efficiency, on the one hand, it is necessary to improve the safety of the highly viscous energetic fluid formula and reduce the risks of highly viscous energetic fluids. On the other hand, it is necessary to develop a new casting method to improve casting efficiency, increase packing density, simplify the process, and facilitate the automated production of highly viscous energetic fluids in the casting device. Summary of the Invention

[0005] In view of the above problems, in order to improve the safety of highly viscous energetic fluid production, ensure the casting quality of highly viscous energetic fluids, and improve production efficiency, the invention discloses a peristaltic pump vacuum casting device for highly viscous energetic fluids. This device can not only reduce production costs, improve production efficiency, and ensure product quality, but also effectively eliminate safety risks, achieve the goal of safe production, and ensure the personal safety of employees. This research invention explores a new way for the accurate casting of highly viscous energetic fluids in the future, and has practical significance for promoting the technological transformation and technological progress of related casting industries in our country.

[0006] The technical solution to achieve the object of the present invention is: a peristaltic pump vacuum casting device for highly viscous energetic fluids, including: a hopper assembly, a peristaltic pump, a vacuum pump, a casting cylinder assembly, and a pipeline assembly; the hopper assembly and the casting cylinder assembly are connected through a casting pipeline in the pipeline assembly, and the peristaltic pump is arranged in the middle of the pipeline between the hopper group and the casting cylinder assembly for the transportation and control of energetic materials; the hopper assembly and the casting cylinder assembly are connected through a constant pressure pipe in the pipeline assembly and connected to the vacuum pump for providing a vacuum environment for the entire casting environment.

[0007] The vacuum casting device further includes a pinch valve, which is arranged between the casting port connecting the hopper assembly and the casting pipeline for the preliminary control of the casting speed.

[0008] The hopper assembly includes a hopper main body, a hopper cover plate, and a first vacuum tube joint; the hopper cover plate is installed on the hopper main body, and the hopper main body is provided with a first vacuum tube joint connected to the constant pressure pipe; the bottom of the hopper main body is provided with a casting port connected to the casting pipeline.

[0009] The casting cylinder assembly includes a cylinder body, which is a double-layer structure, an inner cylinder body and an outer cylinder body; between the inner cylinder body and the outer cylinder body is a closed water bath interlayer, which can only be connected to the outside through a water pipe; the casting mold is placed in the inner cylinder body, and the inner cylinder body is connected to the casting pipeline.

[0010] An outlet water pipe joint and an inlet water pipe joint are installed on the outer cylinder body of the cylinder body; water with a certain temperature from the outside is introduced into the space between the inner cylinder body and the outer cylinder body for providing an environment with a certain temperature for the entire casting.

[0011] A vacuum interface and an observation window are also provided on the cylindrical wall of the outer cylinder body; the vacuum interface and the observation window pass through the space between the inner cylinder body and the outer cylinder body and are directly connected to the inner cylinder body; a vacuum breaking valve is installed on the vacuum interface to provide a vacuum environment for the entire pouring environment; the observation window is used to observe the outflow situation of the energetic fluid in real time during pouring.

[0012] The pouring cylinder assembly includes a cover plate, which is fixedly connected to the cylinder body. A pouring pipeline joint is installed on the cover plate. The pouring pipeline joint is connected to the pouring pipeline in the pipeline assembly and then connected to the hopper assembly. A second vacuum tube joint is installed on the cover plate, and the second vacuum tube joint is connected to the constant pressure pipeline in the pipeline assembly.

[0013] The vacuum pouring device further includes a base and a bracket assembly; the peristaltic pump and the pouring cylinder assembly are installed on the base, the bottom of the bracket assembly is fixed on the pouring cylinder assembly, and the hopper assembly and the pipe clamp valve are sequentially installed on the upper part.

[0014] Compared with the prior art, the remarkable advantages of the present invention are:

[0015] (1) By introducing the peristaltic pump vacuum pouring method, the pouring efficiency and the filling density can be improved;

[0016] (2) Utilizing the advantages of the peristaltic pump's own power, accurate flow rate, and convenient regulation, the process flow can be simplified, and automated and continuous production can be achieved;

[0017] (3) By connecting the hopper and the pouring cylinder through a constant pressure pipe and connecting a vacuum pump to the outside of the pouring cylinder, pouring in a vacuum environment can be achieved, reducing the generation of bubbles during the pouring process and improving the pouring quality.

[0018] (4) Through the setting of the inner and outer cylinder bodies, water with a certain temperature from the outside is introduced into the space between the inner cylinder body and the outer cylinder body to provide an environment with a certain temperature for the entire pouring. Description of the Drawings

[0019] Figure 1 It is a schematic overall layout diagram of the peristaltic pump vacuum pouring device;

[0020] Figure 2 It is a schematic series connection diagram of the connection components;

[0021] Figure 3 It is a schematic pipeline layout diagram of the peristaltic pump vacuum pouring device;

[0022] Figure 4 It is a schematic structural diagram of the peristaltic pump vacuum pouring hopper assembly;

[0023] Figure 5 It is a schematic structural diagram of the peristaltic pump vacuum pouring cylinder assembly, (a) is the schematic structural diagram of the pouring cylinder assemblyFigure 1 , (b) is a schematic structural diagram of the pouring cylinder assembly Figure 2 ;

[0024] Figure 6 is a schematic structural diagram of the pouring cylinder;

[0025] Figure 7 is a schematic diagram of the peristaltic pump vacuum pouring process. Specific embodiments

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or other combinations.

[0028] The present invention will be described in detail below in conjunction with the above-mentioned accompanying drawings.

[0029] A schematic overall layout diagram of a peristaltic pump vacuum pouring device for highly viscous energetic fluids (see Figure 1 ). The present invention provides a peristaltic pump vacuum pouring device for highly viscous energetic fluids, which mainly includes a hopper assembly 1, a tube clamp valve 2, a peristaltic pump 3, a vacuum pump 4, a pouring cylinder assembly 5, a base 6, a support assembly 7, a pipeline assembly 8, and a connecting plate assembly 9. The hopper assembly 1 and the tube clamp valve 2 are fixedly installed on the guide shaft supports in the support assembly 7 from top to bottom in sequence. The pouring cylinder assembly 5 is fixedly installed on the base 6, the vacuum pump 4 is arranged on the side of the base 6, the support assembly 7 is fixedly installed on the cover plate 5-1 of the pouring cylinder assembly 5, and the peristaltic pump 3 is installed on the stepped convex step of the base 6.

[0030] The support assembly 7 not only plays a supporting role for the entire device, but also provides an installation position for the hopper assembly 1 and the tube clamp valve 2. The support assembly 7 includes a guide shaft and guide shaft supports; the guide shaft supports are provided with three layers and are fixedly connected to the guide shaft for installing and placing the hopper assembly 1 and the tube clamp valve 2.

[0031] The connecting plate assembly 9 includes two parts: the first connecting part 9-1 is used to connect the hopper assembly 1 and the tube clamp valve 2, and the second connecting part 9-2 is used to fix the tube clamp valve 2 on the guide shaft supports in the support assembly 7.

[0032] The pinch valve 2 is arranged below the hopper assembly 1. An AKO pneumatic pinch valve in the prior art, with the model DN40, is adopted. It is opened or closed pneumatically to overall control the rough pouring speed.

[0033] The peristaltic pump 3 is arranged below the pinch valve; the peristaltic pump 3 is of the model ExD-600-12L / YZ35 produced by Shenchen Company in the prior art. The peristaltic pump 3 passes through the pouring pipeline 8-1 inside. Through the transportation of the peristaltic pump, a certain external force is applied to the fluid, which can increase the pouring filling density. According to the requirements of the pouring dosage, the parameters of the peristaltic pump are set, and accurate and precise pouring can be realized. At the same time, due to the special physical and chemical properties of the high-viscosity energetic fluid, the characteristics of the peristaltic pump 3 such as quickly replacing the pouring pipeline 8-1, not being in direct contact with the fluid, and having no sharp metal extrusion and friction can meet the pouring requirements.

[0034] The hopper assembly 1 is used to hold the high-viscosity energetic fluid and observe the remaining situation of the high-viscosity energetic fluid in the hopper in real time; the inside of the hopper assembly 1 is in a vacuum environment, which not only plays a role in isolating air but also can remove the gas in the high-viscosity energetic fluid.

[0035] As Figure 4 shown, the hopper assembly 1 includes a hopper main body 1-1, a hopper cover plate 1-2, and a first vacuum tube joint 1-3. The outer shape of the hopper main body 1-1 includes two parts: a cone and a cylinder, with a hollow inside, and the cone and the cylinder are fixedly connected; the hopper cover plate 1-2 is installed at the upper end of the cylinder. One end of the first vacuum tube joint 1-3 is arranged on the cylinder wall and is connected to the inside of the cylinder. The other end of the first vacuum tube joint 1-3 is connected to one end of the constant-pressure pipeline 8-2 in the pipeline assembly 8. The other end of the constant-pressure pipeline 8-2 is connected to the second vacuum tube joint 5-8 in the pouring cylinder assembly 5. By evacuating, the high-viscosity energetic fluid inside the hopper is isolated from air and is in a vacuum environment, improving the safety of pouring. A pouring port is provided at the bottom of the cone of the hopper main body 1-1, and then it is connected to one end of the pouring pipeline 8-1 in the pipeline assembly 8 through the pinch valve 2.

[0036] The roughness values of the inner surfaces of the cone and the cylinder of the hopper main body 1-1 are relatively low, which can not only reduce the viscosity of the inner wall to the high-viscosity fluid, accelerate the outflow of the high-viscosity fluid, but also increase the volume.

[0037] The hopper cover plate 1-2 is made of a transparent material, and on the premise of playing a sealing role, the fluid liquid level can be clearly observed.

[0038] Structural schematic diagram of the pouring cylinder assembly 5 of the peristaltic pump vacuum pouring device (see Figure 5) As shown. The pouring cylinder assembly 5 mainly includes a cover plate 5-1, a third joint 5-2, a second vacuum tube joint 5-8, a pouring pipe joint 5-3, a cylinder body 5-4, a water inlet joint 5-5, a water outlet joint 5-6, and a vacuum breaking valve 5-7. The cover plate 5-1 and the cylinder body 5-4 are fixedly connected by bolts; a pouring pipe interface is provided on the cover plate 5-1, and the pouring pipe joint 5-3 is installed on the pouring pipe interface and connected to the other end of the pouring pipe 8-1 in the pipe assembly 8, and then connected to the bottom of the hopper body 1-1 in the hopper assembly 1. A vacuum interface is also provided on the cover plate 5-1, and the second vacuum tube joint 5-8 is installed at this vacuum interface, and the second vacuum tube joint 5-8 communicates with the constant pressure pipe 8-2 in the pipe assembly 8.

[0039] The cylinder body 5-4 has a double-layer structure. The pouring mold is placed in the inner cylinder body. The space between the inner cylinder body and the outer cylinder body is a sealed space and is not connected; on the barrel wall of the outer cylinder body, there are a water outlet 5-4-1 and a water inlet 5-4-2. One end of the water outlet joint 5-6 is installed on the water outlet 5-4-1, and the other end is connected to the external water outlet pipeline; one end of the water inlet joint 5-5 is installed on the water inlet 5-4-2, and the other end is connected to the external water inlet pipeline; thus, it realizes providing an environment with a certain temperature for the entire pouring, avoiding the curing agent in the energetic fluid from solidifying due to cold condensation and affecting the pouring quality; on the barrel wall of the outer cylinder body, there are also a vacuum interface 5-4-3 and an observation window 5-4-4; the vacuum interface 5-4-3 and the observation window 5-4-4 pass through the space between the inner cylinder body and the outer cylinder body and are directly connected to the inner cylinder body (not connected to the space between the inner and outer cylinder bodies); the third joint 5-2 is a three-way valve, one end is installed on the vacuum interface 5-4-3 (i.e., the side wall of the pouring cylinder), one end is connected to the vacuum valve and connected to the vacuum pump 4, and the other end is installed with the vacuum breaking valve 5-7 to provide a vacuum environment for the entire pouring environment. The observation window 5-4-4 is used to observe the outflow situation of the energetic fluid in real time during pouring.

[0040] Before starting pouring, the air inside the cylinder body 5-4 of the pouring cylinder assembly 5 and the hopper body 1-1 in the hopper assembly 1 is pumped out through the vacuum pump, isolating the contact between the highly viscous energetic fluid and air, and at the same time removing a part of the gas in the fluid to increase the fluid density. During the pouring process and the cooling and shaping stage after pouring, water at the required temperature can be introduced into the water inlet as needed.

[0041] The pipe assembly 8 includes a constant pressure pipe 8-2 and a pouring pipe 8-1; the constant pressure pipe 8-2 connects the hopper assembly 1 and the pouring cylinder assembly 5, and the constant pressure pipe 8-2 is used to make the pressure in the area where the highly viscous energetic fluid flows during the entire pouring process consistent. The pouring pipe 8-1 guides the highly viscous energetic fluid from the hopper body 1-1 in the hopper assembly 1 into the cylinder body 5-4 of the pouring cylinder assembly 5; the water inlet joint 5-5 provides a suitable water bath temperature environment for the entire pouring filling process by connecting water at a certain temperature.

[0042] As Figure 5 shown, the pouring process of the peristaltic pump vacuum pouring device for highly viscous energetic fluids is as follows: At the beginning of pouring, the highly viscous energetic fluid is filled into the inside of the feeding hopper assembly 1, the vacuum pump 4 is turned on, and the gas inside the hopper main body 1-1, inside the cylinder block 5-4, and inside the pipeline is pumped out, so that the entire pouring process is in a vacuum environment. The pipe clamp valve and the peristaltic pump are opened, the peristaltic pump pouring parameters are set, and pouring starts. When the pouring volume reaches the requirement, the peristaltic pump and the pipe clamp valve are closed, the vacuum-breaking valve is opened, and the normal atmospheric environment is restored to complete the pouring.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A peristaltic pump vacuum casting device for highly viscous energetic fluids, characterized in that, It includes a hopper assembly (1), a peristaltic pump (3), a vacuum pump (4), a pouring cylinder assembly (5) and a pipeline assembly (8); The hopper assembly (1) and the pouring cylinder assembly (5) are connected through the pouring pipeline (8-1) in the pipeline assembly (8), and the peristaltic pump (3) is arranged in the middle of the pipeline between the hopper assembly (1) and the pouring cylinder assembly (5) for the transportation and control of energetic materials; The hopper assembly (1) and the pouring cylinder assembly (5) are connected through the constant pressure pipe (8-2) in the pipeline assembly (8), and the vacuum pump (4) is connected thereto for providing a vacuum environment for the entire pouring environment.

2. The peristaltic pump vacuum casting device for highly viscous energetic fluids according to claim 1, characterized in that, The vacuum pouring device further includes a tube clamp valve (2), and the tube clamp valve (2) is arranged between the pouring port connecting the hopper assembly (1) and the pouring pipeline (8-1) for the preliminary control of the pouring speed.

3. The peristaltic pump vacuum casting device for highly viscous energetic fluids according to claim 1, characterized in that, The hopper assembly (1) includes a hopper main body (1-1), a hopper cover plate (1-2), and a first vacuum tube joint (1-3); the hopper cover plate (1-2) is installed on the hopper main body (1-1), and the first vacuum tube joint (1-3) is arranged on the hopper main body (1-1) and is connected to the constant pressure pipe (8-2); a pouring port is arranged at the bottom of the hopper main body (1-1) and is connected to the pouring pipeline (8-1).

4. The peristaltic pump vacuum casting device for highly viscous energetic fluids according to claim 3, characterized in that, The pouring cylinder assembly (5) includes a cylinder body (5-4), and the cylinder body (5-4) is of a double-layer structure, an inner cylinder body and an outer cylinder body; there is a sealed water bath interlayer between the inner cylinder body and the outer cylinder body, and it can only be connected to the outside through a water pipe; the pouring mold is placed in the inner cylinder body, and the inner cylinder body is connected to the pouring pipeline (8-1).

5. The peristaltic pump vacuum casting device for highly viscous energetic fluids according to claim 4, wherein, An outlet water pipe joint (5-6) and an inlet water pipe joint (5-5) are installed on the outer cylinder body of the cylinder body (5-4); water with a certain temperature from the outside is introduced into the space between the inner cylinder body and the outer cylinder body for providing an environment with a certain temperature for the entire pouring.

6. The peristaltic pump vacuum casting device for highly viscous energetic fluids according to claim 4, characterized in that, A vacuum interface (5-4-3) and an observation window (5-4-4) are further arranged on the barrel wall of the outer cylinder body; the vacuum interface (5-4-3) and the observation window (5-4-4) pass through the space between the inner cylinder body and the outer cylinder body and are directly connected to the inner cylinder body; a vacuum breaking valve (5-7) is installed on the vacuum interface (5-4-3) for providing a vacuum environment for the entire pouring environment; the observation window (5-4-4) is used for observing the outflow situation of the energetic fluid in real time during pouring.

7. The peristaltic pump vacuum casting device for highly viscous energetic fluids according to claim 4, characterized in that, The pouring cylinder assembly (5) includes a cover plate (5-1), the cover plate (5-1) is fixedly connected to the cylinder body (5-4), a pouring pipeline joint (5-3) is installed on the cover plate (5-1), the pouring pipeline joint (5-3) is connected to the pouring pipeline (8-1) in the pipeline assembly (8), and then connected to the hopper assembly (1), and a second vacuum tube joint (5-8) is installed on the cover plate (5-1), and the second vacuum tube joint (5-8) is connected to the constant pressure pipeline (8-2) in the pipeline assembly (8).

8. The peristaltic pump vacuum casting device for highly viscous energetic fluids according to claim 2, characterized in that, The vacuum pouring device further includes a base (6) and a support assembly (7); the peristaltic pump (3) and the pouring cylinder assembly (5) are installed on the base, the bottom of the support assembly (7) is fixed on the pouring cylinder assembly (5), and the hopper assembly (1) and the tube clamp valve (2) are sequentially installed on the upper part.

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