Heating device for urea-formaldehyde adhesive production

Abstract

This utility model discloses a heating device for the production of urea-formaldehyde adhesive, relating to the field of urea-formaldehyde adhesive production technology. The utility model includes a tank with an open top and a tank cover fixed to the open top of the tank; a conveying cylinder is vertically arranged inside the tank; multiple support columns are radially fixed to the outer side of the lower port of the conveying cylinder; the ends of the multiple support columns away from the conveying cylinder are fixed to the inner side of the tank; a accommodating cavity is provided inside the circumferential side wall of the conveying cylinder; multiple electric heating tubes are vertically fixed within the accommodating cavity; a spiral rod is coaxially arranged on the inner side of the conveying cylinder; the upper end of the spiral rod passes through the tank cover and is coaxially fixed to the output shaft of a drive motor; the drive motor is vertically fixed to the upper surface of the tank cover. This utility model not only has a reasonable structural design and is convenient to use, but also effectively improves the heating efficiency of urea-formaldehyde adhesive.

Description

Technical Field

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

[0002] Urea-formaldehyde resin adhesive is a thermosetting polymer adhesive formed by the condensation of urea and formaldehyde. It has the characteristics of simple process, low raw material cost, high bonding strength and colorless and transparent after curing, and is suitable for interior decoration and wood processing.

[0003] The production of urea-formaldehyde resin adhesives typically requires the use of heated tanks. However, existing heated tanks usually have heating elements installed on the side walls or bottom of the tank. While this heating structure is simple, it is relatively slow in heating the urea-formaldehyde resin adhesive located in the middle of the tank, resulting in uneven heating and affecting the heating effect. Therefore, there is an urgent need to research a heating device for urea-formaldehyde adhesive production to solve the above problems. Utility Model Content

[0004] The present invention relates to a heating device for the production of urea-formaldehyde adhesive, the purpose of which is to solve the technical problems mentioned in the background art, such as slow heating efficiency and uneven heating of urea-formaldehyde adhesive.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a heating device for the production of urea-formaldehyde adhesive, comprising a tank with an open top and a tank cover fixedly located at the open top of the tank; a conveying cylinder is vertically arranged inside the tank; multiple support columns are radially fixed to the outer side of the lower port of the conveying cylinder; the ends of the multiple support columns away from the conveying cylinder are fixed to the inner side of the tank; a accommodating cavity is provided inside the circumferential side wall of the conveying cylinder; multiple electric heating tubes are vertically fixed inside the accommodating cavity; a spiral rod is coaxially arranged on the inner side of the conveying cylinder; the upper end of the spiral rod passes through the tank cover and is coaxially fixed to the output shaft of a drive motor; the drive motor is vertically fixed to the upper surface of the tank cover.

[0007] As a preferred embodiment of this utility model, the bottom of the tank is conical, and the upper diameter of the conical structure is larger than the lower diameter; the conveying cylinder is disposed above the conical structure of the tank; a discharge port is vertically disposed at the lower end of the conical structure of the tank; and a feed port is disposed on the upper surface of the tank cover.

[0008] As a preferred embodiment of this utility model, a bearing strip is horizontally arranged above the conveying cylinder; one end of the bearing strip is fixed to the upper end of the screw rod; the other end of the bearing strip is vertically rotatably connected to a rotating shaft; the lower end of the rotating shaft extends to the side of the lower end of the conveying cylinder; multiple impellers are fixedly sleeved side by side along the axial direction on the rotating shaft; all the impellers are arranged below the bearing strip; a gear is fixedly sleeved on the upper end of the rotating shaft; the gear is arranged above the bearing strip; an internal gear ring meshes with the gear; the internal gear ring is horizontally fixed to the inner side of the can lid.

[0009] In a preferred embodiment of this invention, the lower end of the rotating shaft extends below the conveying cylinder; a pair of positioning rods are radially fixed to the lower end of the rotating shaft; the ends of the two positioning rods away from the rotating shaft are connected by a scraper frame; the scraper frame slides against the inner side of the tank; the scraper frame includes a pair of scraper blades symmetrically arranged about the rotating shaft; the two scraper blades are respectively fixed to the ends of the positioning rods away from the rotating shaft; the sides of the two scraper blades that are separated slide against the inner side of the tank; the lower ends of the two scraper blades are connected by a reinforcing strip.

[0010] This utility model has the following beneficial effects:

[0011] 1. This utility model involves pouring urea-formaldehyde adhesive into a tank through a feed inlet, with the liquid level of the urea-formaldehyde adhesive lower than the upper port of the conveying cylinder. A drive motor rotates a screw rod, causing the screw rod to continuously convey the urea-formaldehyde adhesive from the lower end of the conveying cylinder upwards through the inside of the conveying cylinder and then discharge it from the upper port of the conveying cylinder into the gap between the conveying cylinder and the tank. This achieves thorough stirring of the urea-formaldehyde adhesive. Simultaneously, during the upward conveying of the urea-formaldehyde adhesive inside the conveying cylinder and the downward conveying through the gap between the conveying cylinder and the tank, an electric heating element thoroughly heats the urea-formaldehyde adhesive. Since the electric heating element is located on the side wall of the conveying cylinder, which is situated within the urea-formaldehyde adhesive, the distance between the urea-formaldehyde adhesive and the electric heating element is reduced, thereby effectively improving the heating efficiency of the urea-formaldehyde adhesive. At the same time, the stirring of the urea-formaldehyde adhesive by the screw rod ensures uniform heating of the urea-formaldehyde adhesive, effectively guaranteeing the heating effect of the urea-formaldehyde adhesive.

[0012] 2. This utility model uses a spiral rod to drive the bearing plate to rotate, which in turn causes the bearing plate to drive the rotating shaft to revolve in the gap between the conveying cylinder and the tank. At the same time, during the revolution of the rotating shaft, the gear rolls on the internal gear ring, causing the rotating shaft to rotate in the gap between the conveying cylinder and the tank. This allows the impeller to stir the urea-formaldehyde adhesive in the gap between the conveying cylinder and the tank, further ensuring the heating efficiency and uniformity of the urea-formaldehyde adhesive.

[0013] 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

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the structure of a heating device for the production of urea-formaldehyde adhesive according to the present invention.

[0016] Figure 2 for Figure 1 The main view of the structure.

[0017] Figure 3 This is a schematic diagram of the connection between the tank body and the conveying cylinder of this utility model.

[0018] Figure 4 This is a schematic diagram of the connection between the screw rod and the rotating shaft of this utility model.

[0019] Figure 5 This is a schematic diagram of the internal toothed ring of this utility model installed on the can lid.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1-Tank body, 2-Tank cover, 3-Conveying cylinder, 4-Support column, 5-Electric heating tube, 6-Drive motor, 7-Screw rod, 8-Bearing plate strip, 9-Rotating shaft, 10-Impeller, 11-Gear, 12-Internal gear ring, 13-Positioning rod, 14-Scraper frame, 101-Discharge port, 102-Valve, 201-Inlet port, 1401-Scraper strip, 1402-Reinforcing strip. Detailed Implementation

[0022] 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.

[0023] Example 1:

[0024] Please see Figure 1-3As shown, this utility model is a heating device for the production of urea-formaldehyde adhesive, including a tank 1 with an open top, a tank cover 2 fixedly installed at the open top of the tank 1, and a conventional control panel installed on the outer side of the tank 1; the bottom of the tank 1 is conical, and the upper diameter of the conical structure is larger than the lower diameter; a discharge port 101 is vertically arranged at the lower end of the conical structure of the tank 1; a conventional valve 102 is installed at the lower port of the discharge port 101; a feed inlet 201 is provided on the upper surface of the tank cover 2; a conveying cylinder 3 is vertically arranged inside the tank 1; the conveying cylinder 3 is located above the conical structure of the tank 1; the outer side of the lower port of the conveying cylinder 3 is radially... Multiple support columns 4 are bolted together; the ends of the multiple support columns 4 away from the conveying cylinder 3 are all bolted to the inner side surface of the tank body 1; a cavity is provided inside the circumferential side wall of the conveying cylinder 3; multiple conventional electric heating tubes 5 are vertically bolted together in the cavity; the electrical terminals of the multiple electric heating tubes 5 are connected in series; a conventional spiral rod 7 is coaxially arranged on the inner side of the conveying cylinder 3; the upper end of the spiral rod 7 passes through the tank cover 2 and is coaxially fixed to the output shaft of a drive motor 6, and there is a clearance fit between the spiral rod 7 and the tank cover 2; the drive motor 6 is vertically bolted to the upper surface of the tank cover 2; the control panel is electrically connected to the drive motor 6 and the electric heating tubes 5 respectively. In use, urea-formaldehyde adhesive is poured into tank 1 through inlet 201, with the liquid level of the urea-formaldehyde adhesive lower than the upper port of conveying cylinder 3. The drive motor 6 drives the screw rod 7 to rotate, causing the screw rod 7 to continuously convey the urea-formaldehyde adhesive from the lower end of the conveying cylinder 3 upward through the inside of the conveying cylinder 3 and then discharge it from the upper port of the conveying cylinder 3 into the gap between the conveying cylinder 3 and tank 1, thus achieving full stirring of the urea-formaldehyde adhesive. At the same time, during the upward conveying of the urea-formaldehyde adhesive inside the conveying cylinder 3 and the downward conveying of the urea-formaldehyde adhesive in the gap between the conveying cylinder 3 and tank 1, the electric heating tube 5 fully heats the urea-formaldehyde adhesive. Since the electric heating tube 5 is set on the side wall of the conveying cylinder 3, and the conveying cylinder 3 is in the urea-formaldehyde adhesive, the distance between the urea-formaldehyde adhesive and the electric heating tube 5 is reduced, thereby effectively improving the heating efficiency of the urea-formaldehyde adhesive. At the same time, the stirring of the urea-formaldehyde adhesive by the screw rod 7 also ensures that the urea-formaldehyde adhesive is heated evenly, effectively ensuring the heating effect of the urea-formaldehyde adhesive.

[0025] Example 2:

[0026] Based on Example 1, as follows Figure 2 and Figure 4-5As shown, a bearing strip 8 is horizontally arranged above the conveying cylinder 3; one end of the bearing strip 8 is bolted to the upper end of the screw rod 7; the other end of the bearing strip 8 is vertically rotatably connected to a rotating shaft 9; the lower end of the rotating shaft 9 extends to the side of the lower end of the conveying cylinder 3; multiple conventional impellers 10 are keyed side by side along the axial direction on the rotating shaft 9; the multiple impellers 10 are all arranged below the bearing strip 8; a gear 11 is keyed to the upper end of the rotating shaft 9; the gear 11 is arranged above the bearing strip 8; an internal gear ring 12 meshes with the gear 11; the internal gear ring 12 is horizontally bolted to the inner side of the tank cover 2. In use, the spiral rod 7 drives the bearing plate 8 to rotate, which in turn causes the bearing plate 8 to drive the rotating shaft 9 to revolve in the gap between the conveying cylinder 3 and the tank 1. At the same time, during the revolution of the rotating shaft 9, the gear 11 rolls on the internal gear ring 12, causing the rotating shaft 9 to rotate in the gap between the conveying cylinder 3 and the tank 1. This allows the impeller 10 to stir the urea-formaldehyde adhesive in the gap between the conveying cylinder 3 and the tank 1, further ensuring the heating efficiency and uniformity of the urea-formaldehyde adhesive.

[0027] Example 3:

[0028] Based on Example 2, as follows Figure 2 and Figure 4 As shown, the lower end of the rotating shaft 9 extends below the conveying cylinder 3; a pair of positioning rods 13 are radially bolted to the lower end of the rotating shaft 9; the ends of the two positioning rods 13 away from the rotating shaft 9 are connected by a scraper frame 14; the scraper frame 14 slides against the inner side of the tank body 1; the scraper frame 14 includes a pair of scraper blades 1401 symmetrically arranged about the rotating shaft 9; the two scraper blades 1401 are respectively bolted to the ends of the positioning rods 13 away from the rotating shaft 9; the sides of the two scraper blades 1401 that are separated from each other are both against the tank body 1. The inner surfaces of the two scraper blades 1401 slide against each other; the lower ends of the two scraper blades 1401 are connected by a reinforcing strip 1402, and the two scraper blades 1401 and the reinforcing strip 1402 are integrally formed; the upper parts of the two scraper blades 1401 form an inverted "V" shape, and the upper parts of the scraper blades 1401 slide against the conical surface of the tank body 1; the lower parts of the two scraper blades 1401 are vertically arranged; the lower parts of the two scraper blades 1401 extend into the discharge port 101, and the scraper blades 1401 slide against the inner surfaces of the discharge port 101. When in use, after the urea-formaldehyde adhesive in the tank 1 is discharged from the discharge port 101, a small amount of urea-formaldehyde adhesive may adhere to the bottom side of the tank 1. At this time, the rotating shaft 9 drives the scraper 14 to rotate at least one revolution via the positioning rod 13, causing the small amount of urea-formaldehyde adhesive on the bottom side of the tank 1 to gather together. Then, the gathered urea-formaldehyde adhesive is discharged from the discharge port 101 under the action of gravity, thereby reducing the amount of urea-formaldehyde adhesive residue at the bottom of the tank 1 and ensuring the production effect of urea-formaldehyde adhesive.

[0029] 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 heating device for the production of urea-formaldehyde adhesive, comprising a tank (1) with an open top and a tank cover (2) fixedly disposed at the open top of the tank (1); characterized in that: A conveying cylinder (3) is vertically arranged inside the tank body (1); multiple support columns (4) are radially fixed on the outer side of the lower port of the conveying cylinder (3); the ends of the multiple support columns (4) away from the conveying cylinder (3) are all fixed on the inner side of the tank body (1); a accommodating cavity is provided inside the circumferential side wall of the conveying cylinder (3); multiple electric heating tubes (5) are vertically fixed inside the accommodating cavity; a spiral rod (7) is coaxially arranged on the inner side of the conveying cylinder (3); the upper end of the spiral rod (7) passes through the tank cover (2) and is coaxially fixed on the output shaft of a drive motor (6); the drive motor (6) is vertically fixed on the upper surface of the tank cover (2).

2. The heating device for urea-formaldehyde adhesive production according to claim 1, characterized in that, The bottom of the tank (1) is conical, and the upper diameter of the conical structure is larger than the lower diameter; the conveying cylinder (3) is located above the conical structure of the tank (1); the lower end of the conical structure of the tank (1) is vertically provided with a discharge port (101); the upper surface of the tank cover (2) is provided with a feed port (201).

3. The heating device for producing urea-formaldehyde adhesive according to claim 1 or 2, characterized in that, A bearing strip (8) is horizontally arranged above the conveying cylinder (3); one end of the bearing strip (8) is fixed to the upper end of the screw rod (7); the other end of the bearing strip (8) is vertically rotatably connected to a rotating shaft (9); the lower end of the rotating shaft (9) extends to the side of the lower end of the conveying cylinder (3); multiple impellers (10) are fixedly sleeved on the rotating shaft (9) along the axial direction; the multiple impellers (10) are all arranged below the bearing strip (8).

4. The heating device for urea-formaldehyde adhesive production according to claim 3, characterized in that, A gear (11) is fixedly sleeved on the upper end of the rotating shaft (9); the gear (11) is positioned above the bearing strip (8); an internal gear ring (12) meshes on the gear (11); the internal gear ring (12) is horizontally fixed on the inner side of the can lid (2).

5. The heating device for urea-formaldehyde adhesive production according to claim 4, characterized in that, The lower end of the rotating shaft (9) extends to the bottom of the conveying cylinder (3); a pair of positioning rods (13) are radially fixed at the lower end of the rotating shaft (9); the two positioning rods (13) are connected to each other by a scraper (14) at the ends away from the rotating shaft (9); the scraper (14) slides against the inner side of the tank (1).

6. The heating device for urea-formaldehyde adhesive production according to claim 5, characterized in that, The scraper frame (14) includes a pair of scraper bars (1401) symmetrically arranged about the rotation axis (9); the two scraper bars (1401) are respectively fixed on the end of the positioning rod (13) away from the rotation axis (9); the side of the two scraper bars (1401) that are separated from each other slides against the inner side of the tank body (1); the lower ends of the two scraper bars (1401) are connected by a reinforcing strip (1402).

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