A differential pressure type venturi ejector applied to resin preparation

Abstract

The utility model provides a kind of applied to the pressure difference type venturi ejector of resin preparation, it is related to venturi ejector technical field, including the feeding main pipe, venturi tube and discharge pipe connected in turn, the middle part of the venturi tube is reduced in diameter section and is throat, further including feed assembly, the feed assembly is set in the throat area, and feed assembly includes the feed unit located in the outside of throat and the discharge unit extended to the inside of throat, the feed unit is used to deliver to be added to venturi tube, the discharge unit is used to realize the uniform mixing of to be added;The feeding hard tube of the utility model can be rotatably arranged, the angle adjustment of discharge direction can be realized, when strong turbulent flow is needed, the discharge end of curved discharge hard tube can be relatively injected with material in feeding main pipe, and disturbance is enhanced;When laminar flow premixing is needed, it can be along the material flow direction, to realize more gentle mixing.

Description

Technical Field

[0001] This utility model relates to the field of Venturi injector technology, and in particular to a differential pressure Venturi injector used in resin preparation. Background Technology

[0002] In the preparation of polymer materials such as epoxy resin and unsaturated polyester resin, material mixing is one of the key steps that determines the performance of the product. The preparation of these resins often requires mixing low-viscosity monomers, curing agents, catalysts and various fillers (such as glass fiber, calcium carbonate, talc powder, etc.).

[0003] Traditional mixing equipment mainly includes mechanical agitators and static mixers. Among them, the Venturi injector in the static mixer is a commonly used one. The Venturi tube uses the negative pressure effect at the throat to suck up additives. It has the advantages of simple structure, no moving parts, and the ability to generate a certain amount of turbulence. It has been applied in the field of fluid mixing. However, when it is directly applied to resin preparation, especially when solid fillers or high-viscosity additives are involved, there are obvious shortcomings: (1) Uneven distribution of additives: The traditional single-point or simple multi-point injection method is difficult to ensure that the additives come into rapid and uniform contact with the high-speed flowing mainstream resin in the narrow space of the throat. It is easy to form local high concentration or insufficient dispersion; (2) The mixing intensity is not adjustable: The injection direction of the fixed structure cannot be flexibly changed according to the characteristics of the additives or process requirements. It is difficult to effectively switch between the need for strong turbulence to break up agglomeration and the need for laminar flow to premix.

[0004] Based on this, a differential pressure Venturi injector for resin preparation is proposed. Utility Model Content

[0005] To address the shortcomings of the existing technology, this invention proposes a differential pressure Venturi injector for resin preparation.

[0006] The technical solution of this utility model is implemented as follows: A differential pressure Venturi injector for resin preparation includes a feed main pipe, a Venturi tube, and a discharge pipe connected in sequence. The middle diameter reduction section of the Venturi tube is a throat. The device also includes a feeding assembly, which is disposed in the throat region. The feeding assembly includes a feeding unit located outside the throat and a discharge unit extending into the throat. The feeding unit is used to transport the additive to the Venturi tube, and the discharge unit is used to achieve uniform mixing of the additive.

[0007] Preferably, the feeding assembly is a first feeding element, which includes:

[0008] An annular feed tube is fitted over the outside of the venturi tube and is connected to an external feed source via a first feed tube.

[0009] An annular post is fixed to the outside of the throat.

[0010] Multiple feeding tubes all penetrate the annular column, with one end extending into the throat.

[0011] The feed hose connects the annular feed pipe and the feed rigid pipe.

[0012] Preferably, the first feeding component further includes a curved discharge rigid pipe connected to the discharge end of the feeding rigid pipe, wherein the feeding rigid pipe is rotatably disposed in the throat to realize the angle adjustment of the discharge direction.

[0013] Preferably, a sealing ring is provided at the position where the feeding rigid pipe passes through the throat, and the sealing ring is embedded in the annular sealing groove opened on the throat wall to achieve dynamic sealing connection.

[0014] Preferably, the feeding assembly is a second feeding element, which includes:

[0015] The second feed tube is connected to the throat.

[0016] The bulk material component is rotatably disposed inside the throat and can rotate automatically by material impact.

[0017] Preferably, the bulk material component includes a connecting shaft rotatably disposed within the throat, and three material distribution plates are fixed in a ring array on the outside of the connecting shaft.

[0018] Preferably, the outside of the connecting shaft is also fixed with three arc-shaped strips in a ring array, the arc-shaped strips and the material distribution plate are distributed alternately, and a stirring rod is connected between the arc-shaped strips and the connecting shaft.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In use, the present invention allows the additive to enter the feeding pipes in multiple directions through the annular feeding pipe and the guiding hose via the first feeding component, and then be fed into the venturi tube through multiple curved discharge pipes. This allows the additive to be added from multiple angles, enabling more comprehensive contact with the material and improving the uniformity of mixing.

[0021] 2. The feed tube is rotatable, which allows for adjustment of the discharge direction angle. When strong turbulence is required, the discharge end of the curved feed tube can be sprayed relative to the material in the feed tube to enhance turbulence. When laminar premixing is required, it can be directed along the material flow direction to achieve gentler mixing.

[0022] 3. When this utility model is in use, the addition is separated by the material distribution plate of the material distribution component after the first feeding component enters the throat. The material distribution component can automatically rotate under the impact of the material. During the rotation, the arc strip and the stirring rod agitate the material and the addition, so that the two are fully mixed and the uniformity is improved. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the first feeding component of this utility model;

[0026] Figure 3 This is a structural schematic diagram of the first feeding component of this utility model from another position;

[0027] Figure 4 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the second feeding component of this utility model;

[0029] Figure 6 This is a structural schematic diagram of the second feeding component of this utility model from another position.

[0030] In the diagram: 1. Main feed pipe; 2. Venturi tube; 21. Throat; 3. Discharge pipe; 4. Feeding assembly; 41. First feeding component; 411. Annular feeding pipe; 412. First feeding pipe; 413. Annular column; 414. Feeding rigid pipe; 415. Guide hose; 416. Curved discharge rigid pipe; 42. Second feeding component; 421. Second feeding pipe; 422. Bulk component; 4221. Connecting shaft; 4222. Distributor plate; 4223. Arc-shaped strip; 4224. Stirring rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0032] This utility model provides, for example Figures 1-6 The illustrated differential pressure venturi ejector for resin preparation includes a feed main pipe 1, a venturi tube 2, and a discharge pipe 3 connected in sequence. The feed main pipe 1, venturi tube 2, and discharge pipe 3 are connected via flanges and sealing gaskets. The sealing gaskets are made of high-temperature and corrosion-resistant materials, such as polytetrafluoroethylene (PTFE) or spiral wound metal gaskets, effectively preventing material leakage and ensuring the safety and sealing of the production process. The narrowed section in the middle of the venturi tube 2 forms a throat 21. When material enters the venturi tube 2 from the feed main pipe 1, ... At the throat 21, due to the narrowing of the pipe diameter, the fluid velocity increases sharply. According to Bernoulli's principle, a low-pressure area is formed here. This low-pressure environment creates conditions for the addition of the material to be drawn in and transported into the Venturi tube 2. In addition, a feeding assembly 4 is also included. The feeding assembly 4 is located in the throat 21 area and includes a feeding unit located outside the throat 21 and a discharging unit extending into the throat 21. The feeding unit is used to transport the addition of the material to the Venturi tube 2, and the discharging unit is used to achieve uniform mixing of the addition of the material.

[0033] Among them, see Figures 1-3 As shown, the feeding assembly 4 is a first feeding component 41, which includes:

[0034] The annular feed pipe 411 is sleeved on the outside of the venturi tube 2 and is connected to the external feed source through the first feed pipe 412. A valve is installed on the first feed pipe 412.

[0035] The annular post 413 is fixed to the outside of the throat 21;

[0036] Multiple feeding tubes 414 all penetrate the annular column 413, and one end of each tube extends into the throat 21.

[0037] Multiple guide hoses 415 are respectively connected between the annular feed pipe 411 and the corresponding feed rigid pipe 414.

[0038] The first feeding component 41 also includes a curved discharge rigid pipe 416 connected to the discharge end of the feeding rigid pipe 414.

[0039] In use, the material is added through the feed pipe 1. As it reaches the venturi tube 2, the pressure decreases, which can absorb the additives fed into the annular feed pipe 411. The additives enter the feed hard pipes 414 in multiple directions through the guide hose 415, and then are sent into the venturi tube 2 through multiple curved discharge hard pipes 416, which can improve the uniformity of the mixing of materials and additives.

[0040] The feeding rigid pipe 414 is rotatably mounted on the throat 21 to adjust the angle of the discharge direction. A sealing ring is provided at the position where the feeding rigid pipe 414 passes through the throat 21. The sealing ring is embedded in an annular sealing groove opened on the wall of the throat 21 to achieve dynamic sealing connection. The top of the feeding rigid pipe 414 is sealed, and a handle is provided at the top of the feeding rigid pipe 414. By turning the feeding rigid pipe 414 with the handle, the discharge end of the curved discharge rigid pipe 416 can be changed to meet different needs.

[0041] For example, when strong turbulence is required, the discharge end of the curved discharge hard pipe 416 and the feed main pipe 1 can be sprayed relative to each other; when laminar premixing is required, the discharge end of the curved discharge hard pipe 416 can be aligned with the material flow direction in the feed main pipe 1. Example

[0042] The difference between this embodiment and Embodiment 1 is: (See attached...) Figures 4-6 As shown, the feeding assembly 4 is a second feeding component 42, which includes a second feeding pipe 421 and a dispersing component 422. The second feeding pipe 421 is connected to the throat 21 and a valve is installed on the second feeding pipe 421. The dispersing component 422 is rotatably disposed inside the throat 21 and can be automatically rotated by the impact of the material in the feeding pipe 1. The dispersing component 422 disperses the mixed materials and additives to improve the uniformity of mixing.

[0043] Among them, see Figure 6 As shown, the bulk material component 422 includes a connecting shaft 4221 rotatably disposed within the throat 21. Three material distribution plates 4222 are fixed in a circular array outside the connecting shaft 4221. Three arc-shaped strips 4223 are also fixed in a circular array outside the connecting shaft 4221. The arc-shaped strips 4223 and the material distribution plates 4222 are distributed alternately. A stirring rod 4224 is connected between the arc-shaped strips 4223 and the connecting shaft 4221. Multiple stirring rods 4224 are provided.

[0044] Through the above technical solution:

[0045] In practical use, the material is added through the feed pipe 1. As it reaches the venturi tube 2, the pressure decreases, which can absorb the additives fed into the second feed pipe 421. The additives enter the throat 21 and can be separated by the distribution plate 4222 outside the connecting shaft 4221. During the rotation, the material and additives can be mixed by the agitation of the arc strip 4223 and the stirring rod 4224, which improves the uniformity of mixing.

[0046] To reduce material blockage at the bulk material component 422, all parts of the bulk material component 422 that come into contact with the material can be made of ultra-high molecular weight polyethylene with a surface roughness Ra value controlled below 0.4μm. In addition, a nano-level hydrophobic and oleophobic coating is sprayed on the surface of the distribution plate 4222 and the stirring rod 4224 to make it difficult for materials to adhere. Even if slight adhesion occurs, it can automatically fall off during the operation of the components.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A differential pressure venturi injector for resin preparation, comprising a feed main pipe (1), a venturi tube (2), and a discharge pipe (3) connected in sequence, wherein the middle section of the venturi tube (2) is a throat (21), characterized in that, It also includes a feeding assembly (4), which is disposed in the throat (21) region and includes a feeding unit located outside the throat (21) and a discharging unit extending into the throat (21). The feeding unit is used to convey the additive to the venturi tube (2) and the discharging unit is used to achieve uniform mixing of the additive. The feeding assembly (4) is a first feeding component (41), which includes: The annular feed pipe (411) is sleeved on the outside of the venturi tube (2) and connected to an external feed source through the first feed pipe (412); An annular post (413) is fixed to the outside of the throat (21); Multiple feeding tubes (414) pass through the annular column (413) and one end of each tube extends into the throat (21); A feed hose (415) is connected between an annular feed pipe (411) and a feed rigid pipe (414).

2. The differential pressure Venturi injector for resin preparation according to claim 1, characterized in that: The first feeding component (41) also includes a curved discharge hard pipe (416) connected to the discharge end of the feeding hard pipe (414). The feeding hard pipe (414) is rotatably disposed in the throat (21) to realize the angle adjustment of the discharge direction.

3. The differential pressure Venturi injector for resin preparation according to claim 2, characterized in that: A sealing ring is provided at the position where the feed tube (414) passes through the throat (21).

4. The differential pressure Venturi injector for resin preparation according to claim 1, characterized in that: The feeding assembly (4) is a second feeding component (42), which includes: The second feed tube (421) is connected to the throat (21). The bulk material component (422) is rotatably disposed inside the throat (21) and can rotate automatically by material impact.

5. The differential pressure Venturi injector for resin preparation according to claim 4, characterized in that: The bulk component (422) includes a connecting shaft (4221) rotatably disposed in the throat (21), and three distributing plates (4222) are fixed in a ring array on the outside of the connecting shaft (4221).

6. The differential pressure Venturi injector for resin preparation according to claim 5, characterized in that: The connecting shaft (4221) is also surrounded by three arc-shaped strips (4223) arranged in a ring. The arc-shaped strips (4223) and the material distribution plate (4222) are distributed alternately, and a stirring rod (4224) is connected between the arc-shaped strips (4223) and the connecting shaft (4221).

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