Quantitative-spraying heat-applying shunting spray rod
By adopting a single-fluid high-pressure spray gun and a circulating heated split spray bar system on the MDI formaldehyde-free plywood production line, the problem of uneven spraying in the adhesive spraying system was solved, and precise supply and temperature control of the adhesive were achieved, improving the consistency and efficiency of adhesive spraying.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-04-03
AI Technical Summary
On existing continuous production lines for MDI formaldehyde-free plywood, the glue spraying system cannot guarantee the uniformity of spraying and performance requirements. In particular, the two-fluid spray gun is difficult to achieve consistency, resulting in frequent uneven glue application.
Employing a single-fluid high-pressure spray gun and a circulating heating split spray bar system, the system combines a sealing cover, an electrically controlled spray gun, a circulating pipeline, and a split heating pipeline to achieve precise supply and temperature control of the adhesive. Combined with PLC individual control of each spray gun, it ensures the accuracy of the adhesive spraying pressure and temperature.
It achieves smooth glue supply and precise temperature control, ensuring consistent glue application from each spray gun and improving the performance and efficiency of the glue application system.
Smart Images
Figure CN224072444U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of adhesive spraying technology in continuous flat pressing production lines for MDI formaldehyde-free plywood, and in particular to a quantitative spraying heated split spray bar. Background Technology
[0002] Plywood is a commonly used material for furniture boards. Traditional plywood processing involves applying adhesive to each sheet using a roller or spray coating method, followed by multi-layer pressing to form the final board. This adhesive application method is only suitable for urea-based plywood production lines. MDI formaldehyde-free plywood cannot be produced due to limitations in the MDI formaldehyde-free adhesive spraying process, especially since continuous flat-press production lines lack an adhesive application system.
[0003] Currently, continuous production lines for formaldehyde-free plywood employ automated splicing, automated MDI gluing, and continuous flat pressing to achieve automated continuous flat pressing of MDI formaldehyde-free plywood and veneer laminated lumber. The two-fluid atomization flow rate is adjusted systemically through the total flow rate. However, due to the influence of colloid pressure, atomizing air pressure, and flow equalization by the flow divider, it is difficult to ensure consistency among multiple spray guns on the spray bar. This leads to uneven spraying, especially when using two-fluid spray guns, making it difficult to guarantee the performance requirements of the gluing system. Utility Model Content
[0004] This disclosure provides a quantitative spraying heated split-flow spray bar that uses a single-fluid high-pressure spray gun to solve one of the technical problems recognized by the inventors.
[0005] This disclosure provides a quantitative spraying heated splitting spray bar, including a sealing cover. Multiple electrically controlled spray guns are fixedly connected to the surface of the sealing cover. A fixing frame is fixedly connected to the surface of the sealing cover. Connector boxes are fixedly connected to both sides of the top of the fixing frame. A circulation pipe is provided in the middle of the fixing frame. Both ends of the circulation pipe are fixedly connected to two of the connector boxes. A splitting heating pipe is provided on the outer side of the circulation pipe. A colloid inlet and outlet are provided on the connector boxes, and the colloid inlet and outlet are connected to the circulation pipe. The splitting heating pipe has a hot oil inlet and a hot oil outlet. The circulation pipe is connected to the electrically controlled spray guns via a pipe.
[0006] Preferably, the two connector boxes are respectively fixedly connected to a first sensor interface and a second sensor interface, the first sensor interface and the second sensor interface are connected in communication with the circulation pipe, the first sensor interface is detachably connected to a first temperature sensor, and the second sensor interface is detachably connected to a first pressure sensor.
[0007] Preferably, a third sensor interface and a fourth sensor interface are fixedly connected to the surface of the diversion heating pipe, and a second temperature sensor and a second pressure sensor are detachably connected to the third sensor interface and the fourth sensor interface, respectively.
[0008] Preferably, a plurality of spray gun mounting plates are fixedly connected to the surface of the sealing cover. The number of spray gun mounting plates is the same as the number of electrically controlled spray guns and corresponds one-to-one. The electrically controlled spray guns are fixedly connected to the spray gun mounting plates, and the output end of the electrically controlled spray guns passes through the sealing cover.
[0009] Preferably, a spray gun sealing plate is provided between the spray gun mounting plate and the sealing cover.
[0010] Preferably, the side of the sealing cover is provided with multiple air intakes, and an air intake hood is provided on the outside of the air intakes. The air intake hood is connected to an air extraction device through an air duct.
[0011] Preferably, a conduit is fixedly connected to the top of the fixing frame, and junction boxes are fixedly connected to both ends of the fixing frame, with the junction boxes and the conduit being connected in a through connection.
[0012] Preferably, the system also includes multiple shut-off valves disposed in the circulation pipeline, the number of which is the same as and corresponds one-to-one with the electronically controlled spray gun.
[0013] Preferably, observation ports are provided at both ends and on the surface of the sealing cover.
[0014] The main advantages of this invention are as follows: This invention supplies adhesive through a circulating pipeline and combines it with a diversion heating pipeline for circulating heating, which ensures smooth adhesive supply and precise temperature control. Furthermore, each electronically controlled spray gun is individually controlled by a PLC, resulting in precise adhesive spraying pressure and better adhesive spraying effect.
[0015] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1This is a three-dimensional structural diagram of the flow-dividing spray bar according to an embodiment of the present disclosure;
[0018] Figure 2 This is an exploded view of the split-flow nozzle structure according to an embodiment of this disclosure;
[0019] Icons: 1-Sealing cover; 101-Observation port; 2-Electrically controlled spray gun; 21-Spray gun fixing plate; 22-Spray gun sealing plate; 23-Blocking valve; 3-Fixing bracket; 31-Cable conduit; 32-Gateway box; 41-Connector box; 411-Colloid inlet / outlet; 42-Circulation pipe; 5-Diverter heating pipe; 51-Hot oil inlet; 52-Hot oil outlet; 61-First sensor interface; 62-Second sensor interface; 63-Third sensor interface; 64-Fourth sensor interface; 71-Suction port; 72-Suction hood. Detailed Implementation
[0020] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.
[0021] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.
[0022] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element 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 disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0024] Example
[0025] like Figure 1-2As shown, this embodiment provides a quantitative spraying heated diversion spray bar, including a sealing cover 1. The sealing cover 1 is used to be set above the conveyor belt where adhesive needs to be sprayed, covering the conveyor belt to prevent adhesive leakage and contamination of the working environment. Multiple electrically controlled spray guns 2 are bolted to the surface of the sealing cover 1. The electrically controlled spray guns 2 are existing electrically controlled spray guns 2 that can independently control the switch and valve size. A fixing frame 3 is bolted to the surface of the sealing cover 1. Connector boxes 41 are bolted to both sides of the top of the fixing frame 3. A circulation pipe 42 is provided in the middle of the fixing frame 3. The two ends of the circulation pipe 42 are connected and fixed to the connector boxes 41 at both ends, thereby positioning the circulation pipe 42 above the electrically controlled spray guns 2. The circulation pipe 42 is connected to the input end of the electrically controlled spray gun 2 via a pipe. The junction box 41 has a colloid inlet / outlet 411. One of the colloid inlet / outlet 411s on the junction box 41 is connected to the colloid input pipe, and the other colloid inlet / outlet 411 on the junction box 41 is connected to the colloid output pipe, thus realizing colloid inlet and outlet at one end. Combined with the circulation pipe 42, the colloid is circulated. The circulation pipe 42 is covered by a diversion heating pipe 5. The diversion heating pipe 5 is set to wrap the circulation pipe 42. The diversion heating pipe 5 is provided with a hot oil inlet 51 and a hot oil outlet 52. Hot oil is input through the hot oil inlet 51. After entering the diversion heating pipe 5, the hot oil heats the colloid in the circulation pipe 42. After heat exchange, it is discharged from the hot oil outlet 52. After repeated heating, it re-enters through the hot oil inlet 51 to form a circulation, thereby ensuring that the temperature is kept constant within a certain range.
[0026] It should be noted that one of the colloid inlets / outlets 411 is connected to the glue inlet pipe, which adopts a three-loop liquid inlet system. The inlet pipe supplies MDI formaldehyde-free glue, cleaning agent, and nitrogen gas respectively. During operation, MDI formaldehyde-free glue is introduced; after operation, cleaning agent or nitrogen gas is introduced to clean the circulation pipe 42 and the electrically controlled spray gun 2.
[0027] In one embodiment, two connector boxes 41 are respectively fixedly connected to a first sensor interface 61 and a second sensor interface 62. The first sensor interface 61 and the second sensor interface 62 are connected in communication with the circulation pipe 42. The first sensor interface 61 is detachably connected to a first temperature sensor, and the second sensor interface 62 is detachably connected to a first pressure sensor. By setting the first sensor interface 61 and the second sensor interface 62 to connect the first temperature sensor and the first pressure sensor, the temperature and pressure inside the circulation pipe 42 are detected. This allows the backend system to receive the data and make adjustments to ensure that the temperature and pressure of the colloid inside the circulation pipe 42 remain constant.
[0028] In one embodiment, a third sensor interface 63 and a fourth sensor interface 64 are fixedly connected to the surface of the diversion heating pipe 5. The third sensor interface 63 and the fourth sensor interface 64 are detachably connected to a second temperature sensor and a second pressure sensor, respectively. By setting the third sensor interface 63 and the fourth sensor interface 64 to connect the second temperature sensor and the second pressure sensor, the temperature and pressure within the diversion heating pipe 5 are detected. This allows the backend system to receive the data and make adjustments, ensuring that the temperature and pressure of the colloid within the diversion heating pipe 5 remain constant.
[0029] Specifically, multiple spray gun mounting plates 21 are bolted to the surface of the sealing cover 1. The number of spray gun mounting plates 21 is the same as the number of electrically controlled spray guns 2 and they correspond one-to-one. The electrically controlled spray guns 2 are fixedly connected to the spray gun mounting plates 21, and the output end of the electrically controlled spray guns 2 passes through the sealing cover 1. The spray guns are fixed to the sealing cover 1 by the spray gun mounting plates 21.
[0030] Furthermore, a spray gun sealing plate 22 is provided between the spray gun mounting plate 21 and the sealing cover 1. The spray gun sealing plate 22 seals the gap between the spray gun mounting plate 21 and the sealing cover 1 to prevent leakage.
[0031] In one embodiment, the sealing cover 1 has multiple air intakes 71 on its side, and an air intake hood 72 is provided on the outer side of each air intake 71. The air intake hood 72 is connected to an extraction device via an air duct. When the colloid is heated and sprayed out through the electrically controlled spray gun 2, it is in an atomized state. During operation, the extraction device is used to extract excess colloid, avoiding contamination of the workspace. Furthermore, the extracted colloid can be reused, saving raw materials.
[0032] Furthermore, a conduit 31 is bolted to the top of the fixing frame 3, and a junction box 32 is bolted to both ends of the fixing frame 3, with the junction box 32 and the conduit 31 connected in a continuous manner. The junction box 32 and the conduit 31 are used to connect the wires of the electric spray gun 2, preventing the wires from being exposed, protecting the wires, and making the overall appearance more aesthetically pleasing and neat.
[0033] Furthermore, it also includes multiple shut-off valves 23 disposed in the circulation pipe 42, the number of which is the same as and corresponds one-to-one with the electronically controlled spray gun 2. Each shut-off valve 23 corresponds to one electronically controlled spray gun 2, and the passage of the electronically controlled spray gun 2 can be closed by the shut-off valve 23. When the electronically controlled spray gun 2 needs to be replaced, the corresponding shut-off valve 23 should be closed first to avoid leakage of the adhesive after disassembly.
[0034] Furthermore, observation ports 101 are provided at both ends and on the surface of the sealing cover 1. Multiple observation ports 101 are embedded at both ends and on the surface of the sealing cover 1. The observation ports 101 are made of transparent material and can be used to observe the adhesive spraying inside the sealing cover 1.
[0035] The working principle of this utility model is as follows: A sealing cover 1 is installed above the material conveyor belt. During operation, colloid is input through the colloid input pipe connected to the colloid inlet / outlet 411. Hot oil is introduced through the hot oil inlet 51 to heat the colloid in the circulation pipe 42. The colloid circulates within the circulation pipe 42, ensuring uniform colloid temperature. During spraying, each electrically controlled spray gun 2 is individually controlled by a PLC. After entering the circulation pipe 42, the colloid is sprayed out from the electrically controlled spray gun 2. During spraying, the exhaust device is activated, and excess colloid spray is sucked away through the suction hood 72, protecting the working environment and allowing for the recovery of excess colloid, thus saving energy. Furthermore, during operation, a first temperature sensor and a first pressure sensor are used to detect the temperature and pressure within the circulation pipe 42, facilitating data reception and adjustment by the backend system to ensure a constant temperature and pressure of the colloid within the circulation pipe 42. Similarly, a second temperature sensor and a second pressure sensor are used to detect the temperature and pressure within the diversion heating pipe 5, again facilitating data reception and adjustment by the backend system to ensure a constant temperature and pressure of the colloid within the diversion heating pipe 5.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.
Claims
1. A metering spray heating and splitting spray bar, characterized in that, include: A sealing cover has multiple electrically controlled spray guns fixedly connected to its surface. A fixing frame is also fixedly connected to the surface of the sealing cover. Connector boxes are fixedly connected to both sides of the top of the fixing frame. A circulation pipe is provided in the middle of the fixing frame. The two ends of the circulation pipe are fixedly connected to two of the connector boxes respectively. A diversion heating pipe is provided on the outer side of the circulation pipe. The connector boxes have colloid inlets and outlets, which are connected to the circulation pipe. The diversion heating pipe has a hot oil inlet and a hot oil outlet. The circulation pipe is connected to the electrically controlled spray guns through a pipe.
2. The metering spray heating and splitting spray bar according to claim 1, characterized in that, The two junction boxes are respectively fixedly connected to a first sensor interface and a second sensor interface. The first sensor interface and the second sensor interface are connected in communication with the circulation pipe. The first sensor interface is detachably connected to a first temperature sensor, and the second sensor interface is detachably connected to a first pressure sensor.
3. The metering spray heating and splitting spray bar according to claim 1, characterized in that, The surface of the diversion heating pipe is fixedly connected to a third sensor interface and a fourth sensor interface, and the third sensor interface and the fourth sensor interface are respectively detachably connected to a second temperature sensor and a second pressure sensor.
4. A metering spray heating and splitting spray bar according to claim 1, characterized in that, Multiple spray gun mounting plates are fixedly connected to the surface of the sealing cover. The number of spray gun mounting plates is the same as the number of electrically controlled spray guns and they correspond one-to-one. The electrically controlled spray guns are fixedly connected to the spray gun mounting plates, and the output end of the electrically controlled spray guns passes through the sealing cover.
5. A metering spray heating and splitting spray bar according to claim 4, characterized in that, A spray gun sealing plate is provided between the spray gun mounting plate and the sealing cover.
6. A metering spray heating and splitting spray bar according to claim 1, characterized in that, The sealing cover has multiple air inlets on its side, and an air suction hood is provided on the outside of the air inlets. The air suction hood is connected to an air extraction device through an air duct.
7. A metering spray heating and splitting spray bar according to claim 1, characterized in that, A conduit is fixedly connected to the top of the fixing frame, and junction boxes are fixedly connected to both ends of the fixing frame, with the junction boxes and the conduit being connected in a through connection.
8. A metering spray heating and splitting spray bar according to claim 1, characterized in that, It also includes multiple shut-off valves installed in the circulation pipeline, the number of which is the same as and corresponds one-to-one with the electronically controlled spray gun.
9. A metering spray heating and splitting spray bar according to claim 1, characterized in that, The sealing cover has observation ports at both ends and on its surface.