A production line for steel fire doors

Abstract

The present invention discloses a production line for steel fire doors, which includes a paint spraying pump, a spraying pipe, a spray gun and a paint tank. A number of detection components for detecting the paint on the pipe wall are arranged in the spraying pipe; the detection components include a bracket and damping plates arranged on both sides of the bracket. A number of detection rods are evenly arranged on the damping plates, and a first spring is arranged between the damping plates and the bracket; a detection switch is arranged on the spraying pipe; both ends of the spraying pipe are connected with a first cleaning pipe and a second cleaning pipe, and a reversing valve is arranged between the spraying pipe and the first cleaning pipe and the second cleaning pipe. The detection switch is electrically connected to the reversing valve. The present invention provides a fire door spraying production line for detecting the adhesion condition of the paint on the spraying pipe wall, so that the spraying pipe wall can be detected by the detection components during the cleaning of the spraying pipe, realizing the thorough cleaning of the spraying pipe wall, thereby ensuring the spraying quality during the surface spraying of the fire door and improving the production quality of the fire door.

Description

Technical Field

[0001] The invention relates to the technical field of fire door production equipment, in particular to a production line for steel fire doors. Background Art

[0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. They are fireproof partitions with a certain degree of fire resistance, located between fire compartments, evacuation stairwells, vertical shafts, etc. They are specially used to isolate fire sources in housing buildings and play a huge role in firefighting work. Once a fire occurs, people can get a chance to escape through fire doors.

[0003] Existing fire doors are usually made of steel, and the inner core is filled with fireproof materials. In order to prevent the appearance of the fire door from rusting and make the fire door fit the building to achieve an aesthetic effect, the steel fire door needs to be sprayed on its surface during production. The existing spraying equipment has the following disadvantages and shortcomings:

[0004] There will be residual paint in the spray pipe, which will turn into impurity particles and flow into the spray paint during the next spraying, thus affecting the appearance quality of the fire door surface after spraying. At the same time, the adhered paint will also mix with the new paint, causing color difference in the paint. Therefore, the spray pipe needs to be cleaned regularly. Summary of the invention

[0005] The invention aims at solving the deficiencies in the prior art and provides a production line for steel fireproof doors.

[0006] To solve the above technical problems, the present invention solves the problems through the following technical solutions: a production line for steel fire doors, including a paint spray pump, a spray pipe, a spray gun and a paint box.

[0007] In the above scheme, preferably, the spray pipe is provided with a plurality of detection components for detecting the paint on the pipe wall;

[0008] The detection assembly includes a bracket and a damping plate arranged on both sides of the bracket, a plurality of detection rods that fit the spray pipe wall are evenly arranged on the damping plate, and a first spring is arranged between the damping plate and the bracket;

[0009] The spraying pipe is provided with a detection switch matched with the sliding rear detection rod;

[0010] The first cleaning pipe and the second cleaning pipe are connected to both ends of the spray pipe, and a reversing valve is arranged between the spray pipe and the first cleaning pipe and the second cleaning pipe, and the detection switch is electrically connected to the reversing valve.

[0011] In the above scheme, preferably, the damping plates on both sides of the bracket are connected by a connecting rod, the connecting rod is slidably inserted into the bracket, and a metal ball is provided at the end of the detection rod.

[0012] In the above scheme, preferably, the first cleaning pipe is connected to a first interface, the second cleaning pipe is connected to a second interface, the first interface and the second interface are both fixed on the paint box, and the first interface and the second interface are connected to a cleaning component for cleaning the spray pipe circuit.

[0013] In the above scheme, preferably, the cleaning assembly includes a cleaning pump, a recovery box and a rotating plate, and the rotating plate is provided with a first hole body and a second hole body which cooperate with the first interface or the second interface after rotation;

[0014] The first hole body is connected to the cleaning pump through a hose, and the second hole body is connected to the recovery box through a recovery pipe.

[0015] In the above scheme, preferably, the recovery box is provided with a servo motor, the rotating plate is provided on the servo motor, and the first interface and the second interface are provided with strong magnetic blocks that can be attracted to the rotating plate.

[0016] In the above scheme, preferably, an impeller is provided in the recovery pipe, an impeller shell matching with the impeller is provided on the recovery pipe, the impeller is connected with a rotating rod, a counting switch matching with the rotating rod is provided on the impeller shell, and the counting switch is electrically connected to the servo motor through a PLC controller.

[0017] In the above scheme, preferably, a float is provided in the recycling box, a float rod is provided on the float, and a plurality of speed regulating buttons cooperating with the float rod are provided on one side of the recycling box, and the speed regulating buttons are electrically connected to the cleaning pump.

[0018] In the above scheme, preferably, the reversing valve includes a valve block, a valve stem, a magnetic plate and an electromagnet, a second spring is provided between the magnetic plate and the electromagnet, a reversing pipe is provided in the valve block which is connected to the spray pipe and the cleaning pipe after sliding, and the electromagnet is electrically connected to the detection switch.

[0019] In the above scheme, preferably, a cleaning liquid tank is provided on one side of the recovery tank, the cleaning pump is connected to the cleaning liquid tank, and a drain valve is provided at the bottom of the recovery tank.

[0020] In the above scheme, preferably, a button plate which can contact with the speed regulating button is provided at the upper end of the float rod.

[0021] The beneficial effects of the present invention are as follows: the present invention provides a fire door spraying production line for detecting the paint adhesion condition of the spraying pipe wall, so that the spraying pipe wall can be detected by the detection component when cleaning the spraying pipe, and the spraying pipe wall can be thoroughly cleaned, thereby ensuring the spraying quality when spraying the fire door surface and improving the production quality of the fire door. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the partially enlarged structure of location A of the present invention.

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the detection component of the present invention.

[0025] Figure 4 It is a schematic diagram of the partially enlarged structure of location B of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figure 1-Figure 4 A production line for steel fire doors includes a paint pump 1, a spray pipe 2, a spray gun 3 and a paint box 4. The paint pump 1 is connected to the spray gun 3 through the spray pipe 2. The paint pump 1 is arranged on the paint box 4. When the paint pump 1 is started, the paint in the paint box 4 can be sucked and then sprayed out by the spray gun 3 through the spray pipe 2. The spray gun 3 can be set on a manipulator, so as to evenly spray the surface of the fire door through a predetermined setting trajectory of the manipulator.

[0027] The two ends of the spray pipe 2 are connected to a first cleaning pipe 10 and a second cleaning pipe 11, respectively. Figure 1 As shown, a first cleaning pipe 10 is provided on one side of the spray pipe 2 and the paint pump 1, and a second cleaning pipe 11 is provided on the other end of the spray pipe 2 connected to the spray gun 3. A reversing valve 12 is provided between the spray pipe 2 and the first cleaning pipe 10 and the second cleaning pipe 11. When it is necessary to clean the spray pipe 2 between the paint pump 1 and the spray gun 3, the reversing valve 12 is started to connect the first cleaning pipe 10 and the second cleaning pipe 11 with the spray pipe 2 for cleaning.

[0028] The reversing valve 12 includes a valve block 51, a valve stem 52, a magnetic plate 53 and an electromagnet 54. Figure 2 As shown, taking the reversing valve on one side of the spray pipe 2 and the paint spray pump 1 as an example, the spray pipe 2 is provided with an active cavity, the electromagnet 54 is fixedly arranged on the cavity wall of the active cavity, one end of the valve stem 52 is connected to the valve block 51, and the other end is connected to the magnetic plate 53, a second spring 55 is arranged between the magnetic plate 53 and the inner wall of the active cavity, the valve block 51 is preferably slidable in the first cleaning pipe 10, and a sealing sliding ring is arranged between it and the first cleaning pipe 10, preferably a Y-shaped sealing ring, a reversing pipe 56 is arranged in the valve block 51, that is, when the electromagnet 54 is energized, the magnetic plate 53 can be adsorbed, and at this time the valve block 51 slides upward with the magnetic plate 53, thereby sliding to the position as shown in the figure. Figure 2In the position shown, the spray pipe 2 is connected to the first cleaning pipe 10 through the reversing pipe 56. When the electromagnet 54 is powered off, the valve block 51 slides downward under the action of the second spring 55 to block the first cleaning pipe 10. At this time, the paint pump 1 can directly spray paint through the spray pipe 2 and the spray gun 3; the reversing valve 12 between the second cleaning pipe 11 and the spray pipe 2 is set the same as the above setting, and the electromagnet 54 can be synchronously opened or disconnected through the PLC controller.

[0029] The spray pipe 2 is provided with a plurality of detection components for detecting the paint adhesion condition on the pipe wall. The detection components include a bracket 5 and damping plates 6 arranged on both sides of the bracket 5. The bracket 5 is fixed on the pipe wall of the spray pipe 2. The damping plates 6 on both sides are connected by a connecting rod 13. The connecting rod 13 is preferably a hexagonal rod, which is slidably arranged on the bracket 5. A first spring 8 is provided between the damping plate 6 and the bracket 5, that is, when liquid flows in the spray pipe 2, the liquid generates pressure on the damping plate 6, which can compress the first spring 8 on this side and make the damping plate 6 slide.

[0030] like Figure 3 As shown, the damping plate 6 is evenly provided with a plurality of detection rods 7 that fit with the wall of the spray pipe. Preferably, 2-8 detection rods 7 are evenly arranged around the circumference of the damping plate 6. A metal ball 14 is provided at the end of the detection rod 7. The metal ball 14 fits with the wall of the spray pipe 2. When the wall of the spray pipe 2 is adhered to solidified paint, the pressure generated by the cleaning fluid on the damping plate 6 is not enough to overcome the resistance between the metal ball 14 and the paint on the wall, so that the damping plate 6 cannot slide. When the paint on the wall of the spray pipe 2 is cleaned, the pressure generated by the cleaning fluid on the damping plate 6 overcomes the resistance of the first spring 8 and causes the damping plate 6 to slide.

[0031] The spray pipe 2 is provided with a detection switch 9 cooperating with the metal ball 14 on the side of the damping plate 6 away from the bracket 5. The detection switch 9 is preferably a metal detection switch. When the metal ball 14 slides to one side with the damping plate 6, it can cooperate with the detection switch 9 on the side to trigger the detection switch. Figure 2 As shown, when the damping plate 6 slides to the right, the metal ball 14 on the right damping plate 6 cooperates with the detection switch 9 on the right to trigger the switch. The spray pipe 2 is provided with a detection switch 9 that cooperates with the corresponding detection component. The detection switches 9 on the same side are electrically connected in series, that is, when the detection switches 9 on the same side are all triggered, it indicates that the wall of the spray pipe 2 at the detection location has been cleaned.

[0032] The detection switches 9 on the same side are connected in series and connected to the electromagnet 9 through the PLC controller, that is, when the detection switches 9 on the same side are all triggered, the PLC controller can control the electromagnet 9 to cut off the power, and the reversing valve 12 to cut off the power, so that the spray pipe 2 is connected with the paint pump 1 and the spray gun 3, and then the paint can be sprayed.

[0033] The first cleaning pipe 10 is connected to a first interface 21, and the second cleaning pipe 11 is connected to a second interface 22. The first interface 21 and the second interface 22 are both fixed on the paint box 4, and the end faces of the first interface 21 and the second interface 22 are on the same plane, and sealing rings are provided on the interface end faces.

[0034] The first interface 21 and the second interface 22 are connected with a cleaning assembly for cleaning the spray pipe 2 channel, that is, when the reversing valve 12 is energized, the spray pipe 2 is connected with the first cleaning pipe 10 and the second cleaning pipe 11 to form a loop, and the cleaning liquid can be introduced into the spray pipe 2 through the cleaning assembly to clean the internal pipe wall thereof. The cleaning assembly includes a cleaning pump 23, a recovery box 24 and a rotating plate 25. Figure 1 As shown, a cleaning liquid tank 61 is fixedly provided on the left side of the recovery tank 24, the cleaning pump 23 is connected to the cleaning liquid tank 61, and the rotating plate 25 is provided with a first hole body 26 and a second hole body 27 which are connected to the first interface 21 or the second interface 22 after rotation, that is, initially, the first interface 21 is connected to the first hole body 26, and the second interface 22 is connected to the second hole body 27. When the rotating plate 25 is driven by external force to rotate 180°, the first interface 21 is connected to the second hole body 27, and the second interface 22 is connected to the first hole body 26.

[0035] The first hole body 26 is connected to the cleaning pump 23 through a hose, and the second hole body 27 is connected to the recovery tank 24 through the recovery pipe 28. That is, initially, the cleaning pump 23 can connect the cleaning liquid in the cleaning liquid tank 61 through the first hole body 26 and the first interface 21, so that it enters the spray pipe 2 after passing through the first cleaning pipe 10, and then the cleaning liquid in the spray pipe 2 flows back to the recovery tank 24 through the second cleaning pipe 11 and the second hole body 27. In order to efficiently clean the pipe wall of the spray pipe 2, the rotating plate 25 is rotated regularly. After the rotating plate 25 rotates 180°, the first hole body 26 is connected to the second interface 22, and the second hole body 27 is connected to the first interface 21. At this time, the cleaning pump 23 connects the cleaning liquid through the first hole body 26 and the second interface 22, passes through the second cleaning pipe 11, and then enters the spray pipe 2, and then flows back to the recovery tank 24 through the first interface 21 of the first cleaning pipe 10 and the second hole body 27, thereby realizing reciprocating punching cleaning of the pipe wall of the spray pipe 2.

[0036] A drain valve 62 is provided at the bottom of the recovery box 24. After the spray pipe 2 is cleaned, the drain valve 62 can be opened through the PLC controller to drain the waste liquid in the recovery box 24. The cleaning liquid can be rosin water or a special cleaning liquid for removing paint.

[0037] The recovery box 24 is provided with a servo motor 31, and the rotating plate 25 is fixedly arranged on the rotating shaft end of the servo motor 31. The first interface 21 and the second interface 22 are provided with a strong magnetic block 32 which can be attracted to the rotating plate 25. That is, when the rotating plate 25 rotates, the above-mentioned interface and the rotating plate 25 can be perfectly attracted to each other, thereby realizing the sealing between the interface and the hole body.

[0038] An impeller shell 34 is provided on one side of the recovery pipe 28 and is connected to the pipe hole thereof. An impeller 33 driven by the refluxed liquid is provided in the impeller shell 34. The lower end of the impeller shell is connected to the recovery tank 24 through a hose, that is, the liquid passing through the second interface 22 flows into the recovery tank 24 after passing through the recovery pipe 28 and the impeller shell 34. The impeller 33 is connected to an impeller shaft. The impeller shaft is connected to a rotating rod 35 after passing through the impeller shell 34. The rotating rod 35 is fixedly connected to the impeller shaft. That is, when the impeller 33 is driven by the liquid, the rotating rod 35 can be driven to rotate. A counting switch 33 cooperating with the rotating rod 35 is provided on the outer wall of the impeller shell 34. 6. The counting switch 36 is electrically connected to the servo motor 31 through the PLC controller. Specifically, when the rotating rod 35 rotates once, the counting switch 36 is triggered to count once. The PLC controller can set the number of counts. When a certain number of times is reached, the servo motor 31 is triggered to rotate 180° in the forward direction, so that the cleaning fluid in the cleaning circuit changes its flow direction. When the counting number is reached again, the servo motor 31 is triggered to rotate 180° in the reverse direction to reset it, and the cycle repeats, thereby realizing the timed rotation of the rotating plate 25, so that the cleaning fluid inside the spray pipe 2 is regularly in a reciprocating cleaning state during cleaning, thereby achieving efficient cleaning.

[0039] A float 41 is provided in the recycling box 28, and the float 41 is connected to a float rod 42. A button plate 63 is fixedly provided on the upper end of the float rod 42 after sliding through the recycling box 28. A plurality of speed regulating buttons 43 cooperating with the sliding button plate 63 are provided on one side of the recycling box 28. The speed regulating buttons 43 are electrically connected to the cleaning pump 23. When the speed regulating buttons 43 are triggered from bottom to top, the speed of the cleaning pump 23 can be increased, thereby increasing the cleaning power and cleaning pressure of the cleaning pump 23. That is, initially, the cleaning pump 23 is at low power. At this time, if the adhesion on the inner wall of the spray pipe 2 is not serious, the cleaning can be completed quickly. When the adhesion is serious, the liquid in the recycling box 28 gradually increases, and the float 41 rises, thereby lifting the button plate 63 upward. At this time, the button plate 63 triggers the speed regulating button 43 above, thereby increasing the cleaning power of the cleaning pump 23, so that the cleaning pump 23 can achieve energy-saving cleaning.

[0040] A method for using a production line for steel fire doors as described above: during production of steel fire doors, fire retardant paint needs to be sprayed on the surface of the fire doors, and after the paint adheres to the inner wall of the spray pipe 2 of the spray production line of the fire doors, the spray pipe 2 needs to be cleaned regularly, or the spray pipe 2 needs to be cleaned before each use;

[0041] When in use, the reversing valves 12 at both ends of the spray pipe 2 are energized by the PLC controller, and the spray pipe 2 is connected to the first cleaning pipe 10 and the second cleaning pipe 11 through the reversing channel 56 in the reversing valve 12;

[0042] Subsequently, the cleaning pump 23 is started, and the cleaning liquid in the cleaning liquid tank 61 enters the spray pipe 2 through the first hole 26 and the first cleaning pipe 10, and then flows back to the recovery box 24 through the second hole 27 from the second cleaning pipe 11. At this time, the damping plate 6 in the detection assembly cannot move because the metal ball 14 is subjected to the resistance of the paint attached to the pipe wall;

[0043] During cleaning, the liquid in the recovery pipe 28 continuously flows into the recovery box 24, so that the impeller 33 rotates, the rotating rod 35 continuously rotates, and the counting switch 36 counts the number of rotations of the rotating rod 35. When the number set by the PLC is reached, the servo motor 31 is triggered to drive the rotating plate 25 to rotate 180°, so that the cleaning liquid of the cleaning pump 23 passes through the first hole 26 and the second cleaning pipe 11 into the spray pipe 2, and then flows back from the first cleaning pipe 10 through the second hole 27, so as to realize reverse cleaning and reciprocating cleaning, thereby improving the cleaning efficiency;

[0044] During cleaning, as the cleaning time increases, the liquid level in the recovery box 24 increases, the float 41 rises, and the button panel 63 triggers the faster speed adjustment button 43, thereby increasing the cleaning power of the cleaning pump 23;

[0045] When the paint adhered to the tube wall at each detection component in the spray tube 2 is cleaned, the damping plate 6 is displaced by the flow pressure of the cleaning liquid, so that the damping plate 6 is displaced in the direction of liquid flow, so that the corresponding metal ball 14 contacts the detection switch 9 on the corresponding side, triggering each detection switch. When all the detection switches on the same side are triggered, the PLC controller controls the electromagnet 54 to cut off the power, so that the reversing valve 12 is cut off, so that the spray tube 2 is connected with the paint pump 1 and the spray gun 3, and further realizes normal spraying.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A production line for steel fire doors, comprising a paint spraying pump (1), a spraying pipe (2), a spray gun (3) and a paint box (4), Features: The spraying tube (2) is provided with a plurality of detection components for detecting the paint on the tube wall; The detection assembly comprises a bracket (5) and a damping plate (6) arranged on both sides of the bracket (5); a plurality of detection rods (7) that are in contact with the wall of the spraying pipe are evenly arranged on the damping plate (6); and a first spring (8) is arranged between the damping plate (6) and the bracket (5); The spraying pipe (2) is provided with a detection switch (9) which cooperates with the sliding rear detection rod (7); The two ends of the spray pipe (2) are connected to a first cleaning pipe (10) and a second cleaning pipe (11); a reversing valve (12) is provided between the spray pipe (2) and the first cleaning pipe (10) and the second cleaning pipe (11); and the detection switch (9) is electrically connected to the reversing valve (12); The first cleaning pipe (10) is connected to a first interface (21), and the second cleaning pipe (11) is connected to a second interface (22); the first interface (21) and the second interface (22) are both fixedly mounted on the paint box (4); the first interface (21) and the second interface (22) are connected to a cleaning component for cleaning a circuit of the spray pipe (2); The cleaning assembly comprises a cleaning pump (23), a recovery box (24) and a rotating plate (25); the rotating plate (25) is provided with a first hole (26) and a second hole (27) which are matched with the first interface (21) or the second interface (22) after rotation; The first hole body (26) is connected to the cleaning pump (23) via a hose, and the second hole body (27) is connected to the recovery box (24) via a recovery pipe (28); The recycling box (24) is provided with a servo motor (31), the rotating plate (25) is provided on the servo motor (31), and the first interface (21) and the second interface (22) are provided with a strong magnetic block (32) that can be attracted to the rotating plate (25); An impeller (33) is provided in the recovery pipe (28); an impeller shell (34) matched with the impeller (33) is provided on the recovery pipe (28); the impeller (33) is connected to a rotating rod (35); a counting switch (36) matched with the rotating rod (35) is provided on the impeller shell (34); the counting switch (36) is electrically connected to the servo motor (31) via a PLC controller; The cleaning pump (23) is connected to the cleaning liquid tank (61).

2. A production line for steel fire doors according to claim 1, Features: The damping plates (6) on both sides of the bracket (5) are connected via a connecting rod (13), the connecting rod (13) is slidably arranged through the bracket (5), and a metal ball (14) is provided at the end of the detection rod (7).

3. A production line for steel fire doors according to claim 1, Features: A floating ball (41) is arranged in the recovery box (24), a floating ball rod (42) is arranged on the floating ball (41), and a plurality of speed regulating buttons (43) cooperating with the floating ball rod (42) are arranged on one side of the recovery box (28), and the speed regulating buttons (43) are electrically connected to the cleaning pump (23).

4. A production line for steel fire doors according to claim 1, Features: The reversing valve (12) comprises a valve block (51), a valve stem (52), a magnetic plate (53) and an electromagnet (54); a second spring (55) is provided between the magnetic plate (53) and the electromagnet (54); a reversing pipe (56) is provided in the valve block (51) and is connected to the spray pipe (2) and the cleaning pipe after sliding; and the electromagnet (54) is electrically connected to the detection switch (9).

5. A production line for steel fire doors according to claim 1, Features: A cleaning liquid tank (61) is provided on one side of the recovery box (24), and a drain valve (62) is provided at the bottom of the recovery box (24).

6. A production line for steel fire doors according to claim 3, Features: The upper end of the float rod (42) is provided with a button plate (63) that can contact the speed regulating button (43).

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