A reaction vessel for the production of urea-formaldehyde resin

Abstract

This utility model discloses a reaction vessel for the production of urea-formaldehyde resin, relating to the field of urea-formaldehyde resin production technology. The utility model includes a top cover and a vessel body. The top cover is connected to a lifting mechanism and has several guide rods movably inserted therethrough. The lower ends of the guide rods extend into the interior of the vessel body and are fixedly connected to an annular scraper assembly and an annular tube. The upper ends of the guide rods are all connected to the lifting mechanism. The guide rods are hollow tubular structures, with their lower ends communicating with the annular tube. The annular tube is evenly equipped with nozzles. The lifting mechanism drives the guide rods to move axially, using the annular scraper assembly to scrape and clean the residual material on the inner wall of the vessel, and simultaneously using the nozzles for spray cleaning. This utility model, through the lifting mechanism driving the annular scraper assembly to scrape and clean the residual material on the inner wall of the vessel, and the simultaneous use of spray cleaning, achieves a more thorough cleaning, effectively improving the cleaning effect of the inner wall of the reaction vessel and the overall cleaning efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of urea-formaldehyde resin production technology, and in particular relates to a reaction vessel for urea-formaldehyde resin production. Background Technology

[0002] Urea-formaldehyde resin is produced by the condensation of urea and formaldehyde under the action of a catalyst to form an initial urea-formaldehyde resin, which is then further processed into an infusible and insoluble final resin adhesive under the action of a curing agent or additives. The production of urea-formaldehyde resin often requires the use of a reaction vessel.

[0003] For example, Chinese utility model CN220696727U discloses a urea-formaldehyde resin adhesive reaction vessel, which includes controlling the extension and retraction of a cylinder to drive a steel pipe to move up and down inside the vessel, then turning on a water pump to extract water from the water tank and pressurize it, transmitting it through a high-pressure water pipe and a steel pipe to a nozzle, and using a lifting device to rinse the inside of the vessel.

[0004] However, the existing technologies mentioned above, which only use spray nozzles for cleaning, often fail to thoroughly clean the inner wall of the reactor due to the presence of spray dead zones, resulting in poor overall cleaning effect and efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a reaction vessel for the production of urea-formaldehyde resin. The vessel uses a lifting mechanism to drive an annular scraper assembly to scrape and clean the residual material on the inner wall of the vessel. At the same time, it uses a spray nozzle to clean the vessel. The synergy of these two methods makes the cleaning more thorough and solves the problem of poor cleaning effect and efficiency in existing methods.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a reaction vessel for the production of urea-formaldehyde resin, comprising a top cover and a vessel body. The top cover is connected to a lifting mechanism and has several guide rods movably inserted therethrough. The lower ends of the guide rods extend into the interior of the vessel body and are fixedly connected to an annular scraper assembly and an annular tube. The upper ends of the guide rods are all connected to the lifting mechanism. The guide rods are hollow tubular structures, and their lower ends communicate with the annular tube. The annular tube is evenly equipped with nozzles. The lifting mechanism drives the guide rods to move axially, and the annular scraper assembly scrapes and cleans the material remaining on the inner wall of the vessel body, while the nozzles spray and clean it.

[0008] As a preferred embodiment of this utility model, the annular tube is connected to a connecting branch pipe that corresponds one-to-one with the guide rod, and the inner wall of the lower end of the guide rod is connected to the outer wall of the connecting branch pipe by a thread.

[0009] As a preferred embodiment of this utility model, the annular scraper assembly includes an annular mounting plate, and the annular mounting plate is fixedly connected to an annular scraper that abuts against the inner wall of the vessel.

[0010] As a preferred technical solution of this utility model, the annular mounting plate has an insertion hole that fits the gap of the connecting branch pipe, and the inner diameter of the insertion hole is smaller than the outer diameter of the guide rod. The guide rod is threadedly connected to the connecting branch pipe, so that the annular mounting plate is clamped between the lower end face of the guide rod and the connecting branch pipe, and is locked and fixed by the guide rod.

[0011] As a preferred embodiment of this utility model, the lifting mechanism includes: a plurality of lead screws, an annular fixed plate, and a driving mechanism; the plurality of lead screws are rotatably connected to the top cover; the annular fixed plate is fixedly connected to a plurality of guide rods, and the annular fixed plate is fixedly connected to a nut that mates with the lead screws; the driving mechanism is connected to the top cover and is used to drive the lead screws to rotate, thereby causing the annular fixed plate to move axially.

[0012] As a preferred embodiment of this utility model, the driving mechanism includes a drive motor and a gear ring. The gear ring is rotatably connected to the top cover, and the output end of the drive motor is fixedly connected to a drive wheel that meshes with the gear ring. A plurality of lead screws are arranged in an array along the circumference of the gear ring, and the lower end of the lead screws is fixedly connected to a driven wheel that meshes with the gear ring.

[0013] As a preferred embodiment of this utility model, the top cover is fixedly connected to a bracket that is rotatably connected to the lead screw.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model has several guide rods that are movably inserted through the top cover. The guide rods are connected to an annular scraper assembly and an annular tube. The guide rods are hollow tubular structures and their lower ends are connected to the annular tube. The guide rods are driven to move axially through a lifting mechanism. The annular scraper assembly is used to scrape and clean the material remaining on the inner wall of the reactor. At the same time, the spray nozzle is used to spray and clean, thereby effectively improving the cleaning effect on the inner wall of the reactor and the overall cleaning efficiency.

[0016] 2. This utility model uses a lead screw to rotate, which in turn drives the guide rod to move axially through an annular fixed plate. The use of lead screw transmission improves the stability of the guide rod's movement, making the overall cleaning process more stable and reliable. Furthermore, the speed at which the guide rod moves can be flexibly adjusted, allowing for flexible adjustment of the cleaning speed according to the difficulty of cleaning the vessel.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0019] Figure 1 This is a schematic diagram of the structure of a reaction vessel for the production of urea-formaldehyde resin according to the present invention;

[0020] Figure 2 for Figure 1 The front view;

[0021] Figure 3 for Figure 2 Sectional view at point AA;

[0022] Figure 4 for Figure 3 Enlarged view of the structure of section B in the middle;

[0023] Figure 5 A schematic diagram of the structure of the top cover, guide rod, annular scraper assembly, and annular tube;

[0024] Figure 6 A schematic diagram of the guide rod, the annular scraper assembly, and the annular tube;

[0025] Figure 7 for Figure 6 A structural diagram viewed from below;

[0026] Figure 8 Exploded view of the guide rod, annular scraper assembly, and annular tube;

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1-Top cover, 2-Bottle body, 3-Guide rod, 4-Annular scraper assembly, 5-Annular pipe, 6-Screw rod, 101-Bracket, 401-Annular mounting plate, 402-Annular scraper, 403-Intercepting hole, 501-Nozzle, 502-Connecting branch pipe, 601-Annular fixing plate, 602-Screw nut, 603-Drive motor, 604-Gear ring, 605-Driven wheel. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Example 1

[0032] Please see Figure 1 and 2 As shown, this utility model is a reaction vessel for the production of urea-formaldehyde resin, including a top cover 1 and a vessel body 2. The top cover 1 is connected and fixed to the upper end of the vessel body 2 through a flange structure. The vessel body 2 can be supported and fixed by welding or bolting to a bracket or other means.

[0033] like Figure 3 , 5 As shown in Figure 7, the top cover 1 is connected to a lifting mechanism and has two guide rods 3 that are movably inserted. The two guide rods 3 are evenly distributed along the circumference of the top cover 1. The lower end of the guide rod 3 extends into the interior of the vessel body 2 and is fixedly connected to an annular scraper assembly 4 and an annular tube 5. The upper ends of the two guide rods 3 are connected to the lifting mechanism.

[0034] The guide rod 3 is a hollow tubular structure. The upper end of the guide rod 3 is connected to the water supply pipeline through a water pipe, and the lower end is connected to the annular pipe 5. The annular pipe 5 is evenly provided with nozzles 501, which face the inner wall of the vessel body 2. The annular scraper assembly 4 is located above the annular pipe 5.

[0035] During cleaning, the lifting mechanism drives the guide rod 3 to move axially downwards. At this time, the annular scraper assembly 4 scrapes away the residual material on the inner wall of the reactor body 2, and the nozzles 501 spray and clean it. This dual cleaning effectively improves the cleaning effect on the inner wall of the reactor and the overall cleaning efficiency. At the same time, the annular pipe 5 is also evenly distributed with nozzles 501 facing the stirring rod inside the reactor body 2, so that the stirring rod can also be sprayed and cleaned during cleaning, improving the overall cleaning effect.

[0036] In this embodiment, the lifting mechanism can be a telescopic device such as a pneumatic cylinder or a hydraulic cylinder, such as the existing technology structure described in the background art. The annular pipe 5 is welded with connecting branch pipes 502 that correspond one-to-one with the guide rod 3. The outer wall of the connecting branch pipe 502 is provided with external threads, and the inner wall of the lower end of the guide rod 3 is provided with matching internal threads, so that the inner wall of the lower end of the guide rod 3 and the outer wall of the connecting branch pipe 502 are connected by threads.

[0037] like Figure 4 and 8As shown, the annular scraper assembly 4 includes an annular mounting plate 401, and an annular scraper 402 that abuts against the inner wall of the vessel body 2 is fixedly connected to the annular mounting plate 401 by screws. At the same time, the annular mounting plate 401 has an insertion hole 403 that fits with the connecting branch pipe 502 with a clearance, and the inner diameter of the insertion hole 403 is smaller than the outer diameter of the guide rod 3.

[0038] During installation, the connecting branch pipe 502 passes through the insertion hole 403 of the annular mounting plate 401 from bottom to top, and is then threadedly connected to the connecting branch pipe 502 via the guide rod 3. This allows the annular mounting plate 401 to be clamped between the lower end face of the guide rod 3 and the connecting branch pipe 502, and is then locked in place using the guide rod 3, thereby achieving the installation and fixation of the three components.

[0039] Example 2

[0040] like Figure 1 As shown, the difference from the embodiment is that the lifting mechanism includes: two lead screws 6, an annular fixed plate 601, and a driving mechanism. The lower ends of the two lead screws 6 are rotatably connected to the top cover 1 through bearing seats and are evenly distributed along the circumference of the top cover 1. The annular fixed plate 601 is fixedly connected to the two guide rods 3, and a nut 602 that mates with the lead screw 6 is fixedly connected to the annular fixed plate 601. Thus, the rotation of the lead screw 6 drives the annular fixed plate 601 to move, thereby driving the guide rods 3 to move axially.

[0041] The drive mechanism is connected to the top cover 1 and is used to drive the lead screw 6 to rotate, so that the annular fixed plate 601 drives the guide rod 3 to move axially. Specifically, the drive mechanism includes a drive motor 603 and a gear ring 604. The drive motor 603 is connected and fixed to the top cover 1 through a motor mounting bracket. The gear ring 604 is rotatably connected to the top cover 1 through a rotary support or an annular guide rail slider assembly, etc. The output end of the drive motor 603 is fixedly connected to a drive wheel that meshes with the gear ring 604.

[0042] Two lead screws 6 are arranged in an array around the circumference of the gear ring 604, and the lower end of the lead screw 6 is fixedly connected to a driven wheel 605 that meshes with the gear ring 604. Furthermore, the top cover 1 is fixedly connected to a bracket 101 that is rotatably connected to each lead screw 6. The bracket 101 is rotatably connected to the lead screw 6 through a bearing seat, thereby improving the stability of the lead screw 6.

[0043] During cleaning, the drive motor 603 drives the gear ring 604 to rotate, and the gear ring 604 drives the lead screw 6 to rotate through the driven wheel 605. This, in turn, drives the guide rod 3 to move axially through the annular fixed plate 601. The use of the lead screw 6 for transmission helps to improve the movement stability of the guide rod 3.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A reaction vessel for the production of urea-formaldehyde resin, comprising a top cover (1) and a vessel body (2), characterized in that: The top cover (1) is connected to a lifting mechanism and has several guide rods (3) that are movably inserted. The lower ends of the guide rods (3) extend into the interior of the vessel body (2) and are fixedly connected to an annular scraper assembly (4) and an annular tube (5). The upper ends of the guide rods (3) are all connected to the lifting mechanism. The guide rod (3) is a hollow tubular structure and its lower end is connected to the annular tube (5). The annular tube (5) is evenly provided with nozzles (501). The guide rod (3) is driven to move axially through the lifting mechanism. The annular scraper assembly (4) is used to scrape and clean the material remaining on the inner wall of the vessel body (2), and the nozzles (501) are used to spray and clean it.

2. The reaction kettle for urea-formaldehyde glue production according to claim 1, characterized in that, The annular tube (5) is connected to a connecting branch tube (502) that corresponds one-to-one with the guide rod (3). The inner wall of the lower end of the guide rod (3) and the outer wall of the connecting branch tube (502) are connected by threads.

3. The reaction kettle for urea-formaldehyde glue production according to claim 2, characterized in that, The annular scraper assembly (4) includes an annular mounting plate (401), and the annular mounting plate (401) is fixedly connected to an annular scraper (402) that abuts against the inner wall of the vessel body (2).

4. The reaction kettle for urea-formaldehyde glue production according to claim 3, characterized in that, The annular mounting plate (401) has an insertion hole (403) that fits the connecting branch pipe (502) with a clearance. The inner diameter of the insertion hole (403) is smaller than the outer diameter of the guide rod (3). The guide rod (3) is threadedly connected to the connecting branch pipe (502), so that the annular mounting plate (401) is clamped between the lower end face of the guide rod (3) and the connecting branch pipe (502), and is locked and fixed by the guide rod (3).

5. The reaction kettle for urea-formaldehyde glue production according to claim 1 or 4, characterized in that, The lifting mechanism includes: A plurality of lead screws (6) are rotatably connected to the top cover (1); An annular fixing plate (601) is fixedly connected to several guide rods (3), and the annular fixing plate (601) is fixedly connected to a nut (602) that cooperates with the lead screw (6); The driving mechanism is connected to the top cover (1) and is used to drive the lead screw (6) to rotate, so that the annular fixed plate (601) drives the guide rod (3) to move axially.

6. A reaction vessel for the production of urea-formaldehyde resin according to claim 5, characterized in that, The drive mechanism includes a drive motor (603) and a gear ring (604). The gear ring (604) is rotatably connected to the top cover (1). The output end of the drive motor (603) is fixedly connected to a drive wheel that meshes with the gear ring (604). Several lead screws (6) are arranged in a circumferential array along the gear ring (604), and the lower end of the lead screw (6) is fixedly connected to a driven wheel (605) that meshes with the gear ring (604).

7. The reaction kettle for urea-formaldehyde glue production according to claim 6, characterized in that, The top cover (1) is fixedly connected to a bracket (101) that is rotatably connected to the lead screw (6).

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