Low-polymerization-degree polyvinyl chloride special resin stripping tower device

Abstract

The utility model discloses a low-polymerization-degree polyvinyl chloride special resin stripping tower device which comprises a stripping tower section and a conical butt joint cylinder fixed at one end in the stripping tower section, and a conical cylinder used for being concentrically connected with the conical butt joint cylinder in an inserted mode is integrally formed at the opening position of the bottom end of the stripping tower section. An annular outer protruding part is integrally formed on the outer wall of the conical barrel, a plurality of inserting grooves are formed in the outer wall of the annular outer protruding part, an annular ring cavity is formed in the conical butt joint barrel, and a plurality of gear type rotating and swinging locking structures used for being connected with the inserting grooves in an inserted mode are installed in the annular ring cavity. According to the utility model, the gear type rotary swing locking structure is driven by the rotary driving unit to act, so that two adjacent tower sections can be quickly locked and connected, the field assembly efficiency of the stripping tower is improved, the accuracy and the stability of the connection of the tower sections can be ensured in the process, and the production efficiency is improved. And the problems of leakage, reduction of the separation effect and the like caused by non-concentric flange point positions are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of stripping towers, in particular to a stripping tower device for a special resin of polyvinyl chloride with low degree of polymerization. Background Technique

[0002] In the processing of special resins of polyvinyl chloride with low degree of polymerization, the stripping tower plays a crucial role. Its main function is to remove impurities in the resin, such as unreacted monomers, solvent residues, and other low-boiling substances, so as to obtain high-purity and high-quality special resins of polyvinyl chloride. The tower body is the main structure of the stripping tower, usually cylindrical, and is equipped with several layers of tower plates inside. The tower plates are key components in the stripping tower, with numerous small holes distributed on them to increase the gas-liquid contact area and improve the mass transfer efficiency. When the resin solution enters the stripping tower from the feed port, it contacts the steam flowing from bottom to top in a countercurrent manner on the tower plates, forming bubbles and mixing. During this process, the low-boiling substances in the resin solution are heated and evaporated to form gases, while the high-boiling resin remains in a liquid state and gradually flows downward. The evaporated gases are discharged through the steam outlet at the top of the tower and are processed by a condensation recovery system to recover the useful substances therein. The resin at the bottom of the tower is discharged through the discharge port to obtain pure special resins of polyvinyl chloride; for example, the polyvinyl chloride special resin pneumatic drying tower device disclosed in the authorized publication number CN208865103U is provided with a first cavity, a second cavity, and a third cavity in sequence along the direction of discharging the piled materials, and the third cavity is provided with a discharge port; a first self-control plugging unit is arranged at the bottom of the first cavity, and a second self-control plugging unit is arranged at the bottom of the second cavity; when the piled materials in the first cavity accumulate to the critical weight, the first self-control plugging unit and the second self-control plugging unit are opened, and the piled materials fall from the first cavity to the second cavity in sequence, which alleviates the problem that the piled materials in the existing polyvinyl chloride special resin pneumatic drying tower need to be stopped and cleaned manually during the working process, and the operation is inconvenient. However, in this technical solution, the tower body of the stripping tower is generally formed by stacking and bolt-connecting several tower sections in sequence. When connecting two adjacent tower sections, the staff needs to ensure that the flange points between the upper and lower tower sections are concentric. Due to the large number of connection points between the tower sections, its installation work becomes more complex and time-consuming. Especially when ensuring the concentricity of the flange points, it is necessary to be more careful and precise during disassembly and installation, increasing the difficulty of tower body installation. Summary of the Invention

[0003] The purpose of the utility model is to provide a stripping tower device for a special resin of polyvinyl chloride with low degree of polymerization. Conical cylinders and conical docking cylinders are arranged at the upper and lower ends of the stripping tower sections. When the head and tail ends of two adjacent stripping tower sections are connected through the conical cylinders and conical docking cylinders, the gear-type swing locking structure is driven by a rotation driving unit to act, so that the movable end of the gear-type swing locking structure enters the slot, so as to solve the problems put forward in the above background technique.

[0004] To achieve the above object, the utility model provides the following technical solutions: A stripping tower device for a special resin of low-polymerization-degree polyvinyl chloride, which includes a stripping tower section and a conical docking cylinder fixed at one end inside the stripping tower section. At the opening position at the bottom end of the stripping tower section, a conical cylinder is integrally formed for concentric insertion with the conical docking cylinder. An annular outer convex part is integrally formed on the outer wall of the conical cylinder, and a plurality of slots are arranged on the outer wall of the annular outer convex part. An annular ring cavity is arranged inside the conical docking cylinder, and a plurality of gear-type swing locking structures for inserting into the slots are installed inside the annular ring cavity. An internal gear slot ring for connecting a plurality of gear-type swing locking structures is rotatably installed inside the annular ring cavity. One side at the bottom end of the conical docking cylinder is provided with a rotation driving unit for driving one of the gear-type swing locking structures to work.

[0005] Preferably, an upper arc-shaped lip plate is integrally formed on the outer edge of the opening at the top end of the stripping tower section, and a lower annular lip plate is integrally formed at one end of the surface of the stripping tower section.

[0006] Preferably, a sealing ring is inlaid at the top end of the upper arc-shaped lip plate, and a groove for fitting with the sealing ring is arranged at the bottom end of the lower annular lip plate.

[0007] Preferably, a plurality of equally spaced vertical ribs are arranged on the outer walls around the stripping tower section, and the cross section of the vertical ribs is rectangular.

[0008] Preferably, the gear-type swing locking structure includes a rotating shaft rotatably installed inside the conical docking cylinder and a locking plate installed at the top end of the rotating shaft. A notch for the locking plate to swing out is arranged on the inner wall of the conical docking cylinder, and a gear monomer for meshing with the internal gear slot ring is fixed at the bottom end of the rotating shaft.

[0009] Preferably, the rotation driving unit adopts a servo motor, and the output end of the servo motor extends into the annular ring cavity and is fixedly connected to the bottom end of one of the rotating shafts.

[0010] Compared with the prior art, the beneficial effect of the utility model is that: By setting structures such as a conical cylinder and a gear-type swing locking structure in cooperation, compared with the traditional flange connection method, the design of the conical cylinder and the conical docking cylinder can greatly simplify the connection process. There is no need to accurately calibrate the flange points. Just drive the gear-type swing locking structure to act through the rotation driving unit, and adjacent two tower sections can be quickly locked and connected, thereby improving the on-site assembly efficiency of the stripping tower. And during this process, the accuracy and stability of the connection of the tower sections can be ensured, avoiding problems such as leakage and reduced separation effect caused by the non-concentricity of the flange points. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1Schematic three-dimensional structure diagram of the present utility model;

[0012] Figure 2 Schematic front view structure diagram of the present utility model;

[0013] Figure 3 Schematic three-dimensional sectional structure diagram of the present utility model;

[0014] Figure 4 Schematic three-dimensional sectional structure diagram of the stripping tower section of the present utility model.

[0015] In the figure: 1, stripping tower section; 2, upper arc-shaped lip plate; 201, sealing ring; 3, conical cylinder; 4, annular outer convex part; 401, slot; 5, lower annular lip plate; 501, groove; 6, conical docking cylinder; 7, gear-type swing locking structure; 701, rotating shaft; 702, locking plate; 703, gear monomer; 704, internal tooth groove ring; 8, rotating drive unit. Specific implementation manner

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0017] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a stripping tower device for a low-degree-of-polymerization polyvinyl chloride special resin, including a stripping tower section 1 and a conical docking cylinder 6 fixed at one end inside the stripping tower section 1. At the bottom opening position of the stripping tower section 1, a conical cylinder 3 for concentric insertion with the conical docking cylinder 6 is integrally formed. An annular outer convex part 4 is integrally formed on the outer wall of the conical cylinder 3, and a plurality of slots 401 are provided on the outer wall of the annular outer convex part 4. An annular ring cavity is provided inside the conical docking cylinder 6, and a plurality of gear-type swing locking structures 7 for inserting into the slots 401 are installed inside the annular ring cavity. An internal tooth groove ring 704 for connecting a plurality of gear-type swing locking structures 7 is rotatably installed inside the annular ring cavity. On one side of the bottom end of the conical docking cylinder 6, a rotating drive unit 8 for driving one of the gear-type swing locking structures 7 to work is installed;

[0018] An upper arc-shaped lip plate 2 is integrally formed at the outer edge of the top opening of the stripping tower section 1. A lower annular lip plate 5 is integrally formed at one end of the surface of the stripping tower section 1. A sealing ring 201 is inlaid at the top of the upper arc-shaped lip plate 2. A groove 501 for mating with the sealing ring 201 is provided at the bottom of the lower annular lip plate 5. During the butt joint of the head and tail ends of two adjacent stripping tower sections 1, the lower annular lip plate 5 will contact the top of the upper arc-shaped lip plate 2, and the sealing ring 201 is located in the groove 501. A sealing surface is formed at the joint of the upper arc-shaped lip plate 2 and the lower annular lip plate 5 by using the groove 501 to ensure the sealing performance of the stripping tower, reduce material leakage and safety risks;

[0019] A number of equally spaced vertical ribs are provided on the outer wall around the stripping tower section 1, and the cross section of the vertical ribs is rectangular;

[0020] The gear-type swing locking structure 7 includes a rotating shaft 701 rotatably installed inside the conical docking cylinder 6, and a locking plate 702 installed at the top of the rotating shaft 701. The rotary drive unit 8 uses a servo motor. The output end of the servo motor extends into the annular cavity and is fixedly connected to the bottom end of one of the rotating shafts 701. When the rotary drive unit 8 uses a servo motor, the rotary power of the servo motor is transmitted to the rotating shaft 701. During this process, the staff can be electrically connected to the servo motor through the motor controller to control the motor to work according to the set direction, speed, angle, and response time;

[0021] A notch for the locking plate 702 to swing out is provided on the inner wall of the conical docking cylinder 6. A gear unit 703 for meshing with the internal tooth groove ring 704 is fixed to the bottom end of the rotating shaft 701;

[0022] After the annular convex portion 4 enters the conical docking cylinder 6, the rotating shaft 701 is driven by the servo motor, and the rotating shaft 701 drives the locking plate 702 to swing until the locking plate 702 swings into the slot 401. At this time, the locking plate 702 limits the annular convex portion 4 and the conical cylinder 3. During this process, since the internal tooth groove ring 704 meshes with the internal tooth groove rings 704 of the other gear-type swing locking structures 7, the other gear-type swing locking structures 7 also act synchronously until the locking plate 702 and the slot 401 are inserted to achieve precise locking and connection.

[0023] When the embodiment of the present application is in use, first, the staff installs a stripping tower section 1. The stripping tower section 1 is used as the tower body of the tower. Subsequently, another stripping tower section 1 is lifted by a suspension device, and the conical cylinder 3 at the bottom end of this stripping tower section 1 is sunk into the upper arc lip plate 2 of the already installed stripping tower section 1 until the two are inserted in place. At this time, the annular outer convex part 4 at the bottom end of the conical cylinder 3 will be located in the conical docking cylinder 6. Then the staff starts the rotation drive unit 8 to work, so that the rotation power of the rotation drive unit 8 is transmitted to each gear-type swing locking structure 7 through the internal tooth groove ring 704. Furthermore, the gear-type swing locking structure 7 acts, so that the movable end of the gear-type swing locking structure 7 is inserted into the slot 401 on the outer wall of the annular outer convex part 4 until the two are locked and connected, thus completing the connection work of two adjacent stripping tower sections 1. Compared with the traditional flange connection method, the design of the conical cylinder 3 and the conical docking cylinder 6 can greatly simplify the connection process. There is no need to accurately calibrate the flange points. Just drive the gear-type swing locking structure 7 to act through the rotation drive unit 8, and adjacent two tower sections can be quickly locked and connected, thereby improving the on-site assembly efficiency of the stripping tower. And during this process, the accuracy and stability of the connection of the tower sections can be ensured, avoiding problems such as leakage and reduced separation effect caused by the non-concentricity of the flange points.

Claims

1. A low-polymerization degree polyvinyl chloride special resin stripping tower device, characterized in that: The invention comprises a stripping tower section (1) and a conical docking tube (6) fixed at one end inside the stripping tower section (1); a conical tube (3) for concentric plugging with the conical docking tube (6) is integrally formed at the bottom opening of the stripping tower section (1); an annular outer protrusion (4) is integrally formed on the outer wall of the conical tube (3); and a plurality of slots (401) are arranged on the outer wall of the annular outer protrusion (4); an annular ring cavity is arranged inside the conical docking tube (6); a plurality of gear-type rotary pendulum locking structures (7) for plugging with the slots (401) are installed inside the annular ring cavity; an internal tooth groove ring (704) for connecting the plurality of gear-type rotary pendulum locking structures (7) is rotatably installed inside the annular ring cavity; and a rotation drive unit (8) for driving one of the gear-type rotary pendulum locking structures (7) to work is installed on one side of the bottom end of the conical docking tube (6).

2. A low-polymerization degree polyvinyl chloride special resin stripping tower device according to claim 1, characterized in that: An upper arc-shaped lip plate (2) is integrally formed on the outer edge of the top opening of the stripping tower section (1), and a lower annular lip plate (5) is integrally formed on one end of the surface of the stripping tower section (1).

3. A low-polymerization degree polyvinyl chloride special resin stripping tower device according to claim 2, characterized in that: A sealing ring (201) is embedded at the top end of the upper arc-shaped lip plate (2), and a groove (501) for matching with the sealing ring (201) is provided at the bottom end of the lower annular lip plate (5).

4. A low-polymerization degree polyvinyl chloride special resin stripping tower device according to claim 1, characterized in that: A plurality of equally spaced vertical ribs are arranged on the outer walls of the stripping tower section (1), and the cross-section of the vertical ribs is formed into a rectangular shape.

5. The low-polymerization degree polyvinyl chloride special resin stripping tower device according to claim 1, characterized in that: The gear-type swing locking structure (7) comprises a rotating shaft (701) rotatably mounted inside a conical docking tube (6), and a locking plate (702) mounted on the top end of the rotating shaft (701); a notch for the locking plate (702) to swing out is provided on the inner wall of the conical docking tube (6); and a gear unit (703) for meshing with an internal toothed ring (704) is fixed to the bottom end of the rotating shaft (701).

6. A low-polymerization degree polyvinyl chloride special resin stripping tower device according to claim 5, characterized in that: The rotation drive unit (8) adopts a servo motor, the output end of which extends into the annular ring cavity and is fixedly connected to the bottom end of one of the rotating shafts (701).

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