A chemical safety pipeline conveying and feeding device

Abstract

This utility model relates to the field of chemical raw material feeding technology and discloses a chemical safety pipeline conveying and feeding device, including a chemical cylinder with four fan-shaped feeding ports evenly distributed circumferentially on its top. Adjacent feeding ports are reinforced by ribbed walls forming a strong support structure. A central tank cover is integrally formed at the center of the top of the chemical cylinder. This device, through the combination design of the fan-shaped feeding ports and the quick-opening feeding cover, replaces the traditional manual feeding method, effectively avoiding the risk of splashing caused by solid materials impacting the liquid surface. The matching inclined discharge pipe and the conveying cylinder form a 30° drop conveying channel. Combined with a variable-pitch spiral blade driven by a variable-frequency speed-regulating motor, precise control of the conveying volume is achieved (the pitch decreases from the inlet to the outlet, allowing for gradual release of conveying pressure). Actual measurements show that this system can increase the solid material conveying efficiency to 12 kg / min, a 300% improvement compared to manual feeding, while the PTFE anti-stick layer controls the material residue rate to below 0.5%.

Description

Technical Field

[0001] This utility model relates to the field of chemical raw material feeding technology, specifically a chemical safety pipeline conveying and feeding device. Background Technology

[0002] Chemical industry is an abbreviation for chemical process, chemical industry and chemical engineering. All technologies that use chemical methods to change the composition and structure of substances or synthesize new substances belong to the field of chemical production, that is, chemical process. The products obtained are called chemicals or chemical products. The chemical industry includes petrochemicals, agricultural chemicals, chemical pharmaceuticals, polymers, coatings, oils and fats, etc. When producing chemical products, different chemical raw materials need to be added to the chemical reaction vessel first. Then, the different chemical raw materials are heated, evaporated, cooled and processed at low and high speeds in the reaction vessel.

[0003] Currently, most existing feeding methods rely on manual feeding. This method makes it impossible to control the amount of material fed, and when feeding solid materials, the materials are prone to colliding with objects inside the reactor, causing liquid to splash and posing a certain danger. Utility Model Content

[0004] The purpose of this invention is to provide a chemical safety pipeline conveying and feeding device, which solves the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a chemical safety pipeline conveying and feeding device, comprising...

[0006] The chemical cylinder has four fan-shaped feeding ports evenly distributed around its top, with ribs forming a reinforced support structure between adjacent feeding ports; a central tank cover is integrally formed at the center of the top of the chemical cylinder, forming a closed reaction chamber;

[0007] A fixed cover is installed in a sealed manner on the top of the central tank cover, and a drive motor is installed inside it;

[0008] The output shaft of the drive motor is vertically connected to the connecting shaft via a coupling. The connecting shaft passes through the top of the fixed cover, the central tank cover and extends into the inside of the chemical cylinder.

[0009] The connecting shaft is equipped with multiple sets of stacked stirring blades on the shaft section inside the chemical cylinder, with each set of blades arranged at a 45° helical angle; a shock-resistant temperature gauge is installed on the side wall of the fixed cover, and an explosion-proof pressure gauge is installed at the corresponding position on the top of the central tank cover, with the two instruments connected by a flange seal.

[0010] Preferably, each feeding port is equipped with a quick-opening feeding cover, the top of which is connected to the feeding pipe via a flange.

[0011] Preferably, the feeding pipe is inclined at a 30° angle and connected to the high end of the conveying cylinder, and the feeding pipe is provided at the top of the low end of the conveying cylinder.

[0012] Preferably, a variable frequency speed control motor is installed at the end of the conveying cylinder, and its output shaft is connected to the conveying shaft through a mechanical seal. The conveying shaft is equipped with variable pitch spiral blades, and the blade pitch gradually decreases from the feed end to the discharge end.

[0013] Preferably, motor bases are symmetrically welded to both sides of the outer wall of the chemical cylinder, and a stirring motor is fixedly installed on them.

[0014] Preferably, the stirring motor is connected to two parallel stirring shafts via a rigid coupling, and the stirring shafts are equipped with double-row spherical roller bearings at the point where they penetrate the side wall of the chemical cylinder; each stirring shaft has multiple arc-shaped stirring blades arranged alternately, and the surface of the blades is coated with a ceramic wear-resistant coating.

[0015] Preferably, an O-ring is provided between the feeding cover and the feeding port; a polytetrafluoroethylene anti-stick layer is provided on the inner wall of the conveying cylinder; the entire device is made of stainless steel and the surface is coated with a corrosion-resistant epoxy resin coating.

[0016] This utility model provides a chemical safety pipeline conveying and feeding device. It has the following beneficial effects:

[0017] (1) This device replaces the traditional manual feeding method with a combination design of a fan-shaped feeding port and a quick-opening feeding cover, effectively avoiding the risk of splashing caused by solid materials impacting the liquid surface. The matching inclined feeding pipe and conveying cylinder form a 30° drop conveying channel, combined with a variable pitch spiral blade driven by a variable frequency speed control motor, to achieve precise control of the conveying volume (the pitch decreases from the feeding end to the discharging end, so that the conveying pressure is gradually released). According to actual tests, the system can increase the solid material conveying efficiency to 12kg / min, which is 300% higher than the manual feeding method. At the same time, the material residue rate is controlled below 0.5% through the polytetrafluoroethylene anti-stick layer.

[0018] (2) This utility model achieves efficient mixing through a closed cavity formed by the central tank cover and the chemical cylinder, and a dual stirring system: the main stirring shaft is equipped with stacked blades with a 45° helical angle to form an axial circulating flow field; the side stirring shaft is equipped with ceramic-coated arc blades to generate radial shear force. The differential rotation of the dual stirring motors enables the material to reach a uniformity of ≥98% within 3 minutes. The O-ring seal and the 304 stainless steel substrate + epoxy resin coating provide double protection. It can run continuously for 72 hours in the hydrochloric acid environment test without corrosion leakage, and its service life is extended by 5 years compared with ordinary carbon steel equipment. Attached Figure Description

[0019] Figure 1 This is a perspective view of the overall structure of this utility model;

[0020] Figure 2 This is a top view of the structure of this utility model;

[0021] Figure 3 This is a front sectional view of the overall structure of this utility model.

[0022] In the diagram: Chemical cylinder 21, feeding port 22, ribbed wall 23, central tank cover 24, fixed cover 25, drive motor 26, connecting shaft 27, stirring blade 28, thermometer 29, pressure gauge 210, feeding cover 211, discharge pipe 31, conveying cylinder 32, feed pipe 33, variable frequency speed control motor 34, conveying shaft 35, variable pitch spiral blade 36, motor base 41, stirring motor 42, stirring shaft 43, stirring blade 44. Detailed Implementation

[0023] 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.

[0024] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] A preferred embodiment of the chemical safety pipeline conveying and feeding device provided by this utility model is, for example... Figure 1-3 As shown: A chemical safety pipeline conveying and feeding device, comprising...

[0026] The chemical cylinder 21 has four fan-shaped feeding ports 22 evenly distributed around its top. The adjacent feeding ports 22 are reinforced by ribs 23. A central tank cover 24 is integrally formed at the center of the top of the chemical cylinder 21, forming a closed reaction chamber.

[0027] A fixed cover 25 is sealed and installed on the top of the central tank cover 24, and a drive motor 26 is installed inside it;

[0028] The output shaft of the drive motor 26 is vertically connected to the connecting shaft 27 via a coupling. The connecting shaft 27 passes through the top of the fixed cover 25, the central tank cover 24 and extends into the interior of the chemical cylinder 21.

[0029] Multiple sets of stacked stirring blades 28 are installed on the shaft section of the connecting shaft 27 located inside the chemical cylinder 21, with each set of blades arranged at a 45° helical angle; a shock-resistant temperature gauge 29 is installed on the side wall of the fixed cover 25, and an explosion-proof pressure gauge 210 is installed at the corresponding position on the top of the central tank cover 24, with the two instruments connected by a flange seal.

[0030] Each feeding port 22 is equipped with a quick-opening feeding cover 211, the top of which is connected to the feeding pipe 31 via a flange.

[0031] The feeding pipe 31 is inclined at 30° and connected to the high end of the conveying cylinder 32. The top of the low end of the conveying cylinder 32 is provided with a feeding pipe 33.

[0032] A variable frequency speed control motor 34 is installed at the end of the conveying cylinder 32. Its output shaft is connected to the conveying shaft 35 through a mechanical seal. A variable pitch spiral blade 36 is installed on the conveying shaft 35. The blade pitch gradually decreases from the feed end to the discharge end.

[0033] The chemical cylinder 21 has motor bases 41 symmetrically welded on both sides of its outer wall, and a stirring motor 42 is fixedly installed on them.

[0034] The stirring motor 42 is connected to two parallel stirring shafts 43 via a rigid coupling. The stirring shafts 43 are equipped with double-row spherical roller bearings at the point where they pass through the side wall of the chemical cylinder 21. Multiple arc-shaped stirring blades 44 are staggered on each stirring shaft 43, and the surface of the blades is coated with a ceramic wear-resistant coating.

[0035] An O-ring is provided between the feeding cover 211 and the feeding port 22; a polytetrafluoroethylene anti-stick layer is provided on the inner wall of the conveying cylinder 32; the whole device is made of 304 stainless steel and the surface is coated with a corrosion-resistant epoxy resin coating.

[0036] In operation, the operator opens the feeding cover 211 to add solid material, which enters the conveying cylinder 32 along the feeding pipe 31. A variable frequency speed-regulating motor 34 drives the conveying shaft 35 to rotate, and a variable pitch spiral blade 36 pushes the material from the feeding pipe 33 into the chemical cylinder 21. By adjusting the motor speed, the amount of material fed per unit time can be precisely controlled. When the pressure inside the chemical cylinder exceeds 0.8 MPa, the explosion-proof pressure gauge 210 triggers the motor shutdown protection.

[0037] After the drive motor 26 starts, the connecting shaft 27 drives the stacked stirring blades 28 to rotate at a high speed of 1450 rpm, forming a vortex zone with a diameter of 1.2 m in the central area of ​​the chemical cylinder 21. At the same time, the dual-output shaft stirring motor 42 drives two parallel stirring shafts 43 to rotate at a differential speed of 980 rpm, and the arc-shaped stirring blades 44 push the surrounding material towards the center. The two stirring systems work together to enable the material to complete the transformation from a stratified to a homogeneous state within 5 minutes. The temperature gauge 29 monitors the heat of reaction in real time, and automatically starts the cooling water circulation when the temperature exceeds 80℃.

[0038] The shock-resistant temperature gauge 29 employs bimetallic strip sensing technology, with a measurement range of -50℃ to 300℃ and an accuracy of ±1℃. The explosion-proof pressure gauge 210 is equipped with an explosion-proof housing and can be safely used in Class A explosive gas environments. Both instruments transmit data to the DCS control system via a 4-20mA signal. When the monitored value exceeds the set threshold, the system automatically executes emergency measures.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A chemical safety pipeline conveying feeding device, characterized in that, include The chemical cylinder (21) has four fan-shaped feeding ports (22) evenly distributed around its top. The adjacent feeding ports (22) are reinforced by ribs (23). The top center of the chemical cylinder (21) is integrally formed with a central tank cover (24) to form a closed reaction chamber. A fixed cover (25) is sealed and installed on the top of the central tank cover (24), and a drive motor (26) is installed inside it; The output shaft of the drive motor (26) is vertically connected to the connecting shaft (27) via a coupling. The connecting shaft (27) passes through the top of the fixed cover (25), the central tank cover (24) and extends into the interior of the chemical cylinder (21). The connecting shaft (27) is located inside the chemical cylinder (21) and multiple sets of stacked stirring blades (28) are installed on the shaft section, with each set of blades arranged at a 45° helical angle; a shock-resistant temperature gauge (29) is installed on the side wall of the fixed cover (25), and an explosion-proof pressure gauge (210) is installed at the corresponding position on the top of the central tank cover (24), with the two instruments connected by a flange seal.

2. The chemical industry safety pipeline feeding device according to claim 1, characterized in that: Each feeding port (22) is equipped with a quick-opening feeding cover (211), the top of which is connected to the feeding pipe (31) via a flange.

3. The chemical industry safety pipeline feeding device according to claim 2, characterized in that: The feeding pipe (31) is inclined at 30° and connected to the high end of the conveying cylinder (32), and the top of the low end of the conveying cylinder (32) is provided with a feeding pipe (33).

4. The chemical industry safe pipeline feeding device according to claim 3, characterized in that: The conveying cylinder (32) is equipped with a variable frequency speed control motor (34) at its end. Its output shaft is connected to the conveying shaft (35) through a mechanical seal. The conveying shaft (35) is equipped with a variable pitch spiral blade (36), and the blade pitch gradually decreases from the feed end to the discharge end.

5. The chemical safe pipeline feeding device according to claim 1, characterized in that: The chemical cylinder (21) has motor bases (41) symmetrically welded on both sides of its outer wall, and a stirring motor (42) is fixedly installed on them.

6. The chemical safe pipeline feeding device according to claim 5, characterized in that: The stirring motor (42) is connected to two parallel stirring shafts (43) via a rigid coupling. The stirring shafts (43) are provided with double-row spherical roller bearings at the side wall of the chemical cylinder (21). Multiple arc-shaped stirring blades (44) are arranged alternately on each stirring shaft (43), and the surface of the blades is provided with a ceramic wear-resistant coating.

7. The chemical safe pipeline feeding device according to claim 2, characterized in that: An O-ring is provided between the feeding cover (211) and the feeding port (22); a polytetrafluoroethylene anti-stick layer is provided on the inner wall of the conveying cylinder (32); the whole device is made of 304 stainless steel and the surface is coated with a corrosion-resistant epoxy resin coating.

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