Safety anti-pressure protection device for multilayer furnace door
By using a safety laser scanner and safety circuit in multi-layer furnace doors, the problem of blind spots in photoelectric detection is solved, enabling safe closing and opening of the furnace doors, preventing equipment damage and personnel injury, and facilitating maintenance.
Patent Information
- Application Number
- CN202520435676.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-12
AI Technical Summary
The existing photoelectric detection of multi-layer furnace doors has blind spots, which may lead to the risk of damage or injury to the robotic arm fork or human hand, and cannot effectively prevent equipment damage or personnel injury when the furnace door is closed.
Employing a safety laser scanner and safety circuit, the system detects whether the robotic arm's fork has retracted from the furnace door position via an electrical connection between the laser scanner and the safety circuit. This prevents the robotic arm's fork or human hand from being crushed when the furnace door closes. The system also includes an emergency stop circuit with safety relays and servo drives to ensure the safe opening and closing of the furnace door.
It effectively prevents equipment damage or personal injury caused by furnace door closure, improves the flexibility and reliability of testing, and facilitates the disassembly and maintenance of the safety laser scanner.
Smart Images
Figure CN223882754U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a protection device, more specifically, it relates to multilayer furnace door safety pressure protection device. BACKGROUND
[0002] In the production of flat products such as glass products, the mechanical hand fork is mainly used to send the products into the heating furnace, and then the furnace door is closed to heat the products. In order to improve the heating efficiency and heat utilization rate, the furnace door often adopts a multi-layer structure to ensure its thermal insulation. However, such structure also brings a larger weight to the furnace door, so the furnace door needs to rely on two lifting motors on the left and right as power to realize the descent closing and the rise opening. At the same time, in order to check whether the mechanical hand fork has exited the furnace door position, the existing method is to use the contrast type photoelectric detection to check whether the mechanical hand fork has exited the furnace door position (using a line detection method) to prevent the products or the mechanical hand fork from being pressed when the multi-layer furnace door is closed. However, there are more than twenty layers of products in the furnace, which also leads to a larger height of the furnace opening, and there is a larger dead angle position for the contrast type photoelectric detection to check whether the mechanical hand fork has exited the furnace door position. Even if multiple pairs of contrast type photoelectric are laid out, there are still dead angles in the detection process. Moreover, during the process of taking and placing the products, sometimes human intervention is needed. If the mechanical hand fork or the operator's arm cannot be detected and the furnace door is closed, it is very easy to cause the furnace door to press the mechanical hand fork or the hand, resulting in damage to the equipment or injury to the personnel. SUMMARY
[0003] The technical problem to be solved by the utility model is to provide a multilayer furnace door safety pressure protection device in view of the deficiencies of the prior art.
[0004] The multilayer furnace door safety pressure protection device, the device comprises a safety laser scanner and a safety circuit, the safety circuit is electrically connected with a furnace door switch circuit, the safety laser scanner is electrically connected with the safety circuit, and the safety laser scanner is installed on a second mounting plate at the bottom of the furnace opening.
[0005] The safety circuit comprises a first safety relay, a second safety relay, a third safety relay, a fourth safety relay and a safety relay.
[0006] The coil of the first safety relay is electrically connected with the fifth terminal of the safety laser scanner, and the coil of the second safety relay is electrically connected with the fourth terminal of the safety laser scanner.
[0007] The twenty-first terminal of the safety relay is electrically connected with the twenty-second terminal of the safety relay through the normally open switch of the first safety relay and the normally open switch of the second safety relay connected in series.
[0008] The eleventh terminal of the safety relay is electrically connected with the twelfth terminal of the safety relay through the normally open switch of the first safety relay and the normally open switch of the second safety relay connected in series;
[0009] The thirteenth terminal of the safety relay is electrically connected with the negative pole of the external power supply through the coil of the third safety relay, and the twenty-third terminal of the safety relay is electrically connected with the negative pole of the external power supply through the coil of the fourth safety relay;
[0010] The twentieth pin of the servo driver of the right lifting motor in the furnace door switch circuit is electrically connected with the negative pole of the external power supply through the normally open switch of the third safety relay, the twentieth pin of the servo driver of the right lifting motor is electrically connected with the twentieth pin of the servo driver of the right lifting motor, the twentieth pin of the servo driver of the left lifting motor in the furnace door switch circuit is electrically connected with the negative pole of the external power supply through the normally open switch of the fourth safety relay, and the twentieth pin of the servo driver of the left lifting motor is electrically connected with the third pin of the servo driver of the left lifting motor.
[0011] Further improvement, the normally open switch of the first safety relay is provided with a handheld human-computer interface and a safety button connected in series between the twenty-first terminal and the eleventh terminal of the safety relay.
[0012] Further, the thirty-first terminal of the safety relay is electrically connected with the thirty-second terminal of the safety relay through the reset button, the normally closed switch of the fourth safety relay and the normally closed switch of the third safety relay connected in series.
[0013] Still further, the safety laser scanner is mounted on the second mounting plate at the bottom of the furnace mouth through a support structure, the support structure comprises a first base, a second base and a triangular base, the safety laser scanner is detachably mounted on the first base, the first base is detachably mounted on the second base, the second base is fixedly mounted on the triangular base, and the triangular base is detachably mounted on the second mounting plate of the furnace mouth.
[0014] Still further, the triangular base is mounted on the second mounting plate through a first bolt, and the second base is fixedly mounted in the middle of the triangular base.
[0015] Still further, the first base comprises a first bottom plate, a first side plate and two second side plates, the two second side plates are fixedly installed on both sides of the first bottom plate respectively, the first side plate is fixedly installed on the first bottom plate and the two second side plates are fixedly connected with the first side plate on both sides respectively, and the first bottom plate, the first side plate and the two second side plates are of an integrated structure.
[0016] The safety laser scanner is mounted on the first bottom plate through a second bolt.
[0017] Further, two second side plates are provided with a taking opening away from the side of the first side plate.
[0018] Further, the second base comprises a second bottom plate and two third side plates, the two third side plates are respectively fixedly installed on the two sides of the second bottom plate, the second bottom plate is fixedly installed on the middle part of the triangular base, and the second bottom plate and the two third side plates are in an integrated structure.
[0019] The second side plate is installed on the third side plate through a third bolt.
[0020] Further, the second bolt and the third bolt are lock nuts.
[0021] Beneficial effects
[0022] The utility model discloses the advantages are:
[0023] The utility model discloses a safe laser scanner and safety circuit, safety circuit and furnace door switch circuit electric connection, safety laser scanner and safety circuit electric connection, safety laser scanner passes through support structure and installs on the second mounting plate of furnace door bottom, and the mode of setting safety laser scanner is compared with the mode of contrast type photoelectric detection, and the occupied space is small, and the detection range can be flexibly set, can prevent the emergence because of the furnace door close and the equipment damage or personnel casualty situation, and the detachable structure facilitates the dismounting of safety laser scanner, when safety laser scanner appears the fault, can replace in time the safety laser scanner of fault, to prevent the delay work progress. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is overall structure schematic diagram of multilayer furnace door safety pressure protection device of the utility model;
[0025] Figure 2 It is safety laser scanner wiring diagram of the utility model;
[0026] Figure 3 It is safety circuit principle diagram of the utility model;
[0027] Figure 4 It is internal structure diagram of safety relay of the utility model;
[0028] Figure 5 It is drive circuit principle diagram in furnace door switch circuit of the utility model;
[0029] Figure 6 It is Figure 1 It is the enlarged view of A in the middle;
[0030] Figure 7The utility model discloses a safe laser scanner mounting structure schematic diagram.
[0031] Among them: 1 - safe laser scanner, 2 - furnace mouth, 3 - first mounting plate, 4 - second mounting plate, 5 - third mounting plate, 6 - first bottom plate, 7 - first side plate, 8 - triangular base, 9 - first bolt, 10 - second bolt, 11 - third bolt, 12 - second side plate, 13 - taking mouth, 14 - second bottom plate, 15 - third side plate, OSSD1 - the coil of first safety relay, OSSD2 - the coil of second safety relay, OSSD1_1 - the normally open switch of first safety relay, OSSD2_1 - the normally open switch of second safety relay, RY88 - the coil of third safety relay, RY89 - the coil of fourth safety relay, RY88_1 - the normally open switch of third safety relay, RY89_1 - the normally open switch of fourth safety relay, U1 - the servo driver of right lifting motor, U2 - the servo driver of left lifting motor, KA - safety relay, EMS - handheld man-machine interface, RY72 - safety button, RY88_2 - the normally closed switch of third safety relay, RY89_1 - the normally closed switch of fourth safety relay, P24B - the positive pole of external power supply, N24B - the negative pole of external power supply. DETAILED DESCRIPTION
[0032] The utility model makes further description in combination with example, but does not constitute any limit to the utility model, and the limited times modification of anyone in the utility model claim scope is still in the utility model claim scope.
[0033] Reference Figures 1-7 The utility model discloses a multilayer furnace door safety pressure protection device, which comprises a safety laser scanner 1 and a safety circuit, the safety circuit is electrically connected with a furnace door switch circuit, the safety laser scanner 1 is electrically connected with the safety circuit, and the safety laser scanner 1 is installed on the second mounting plate 4 at the bottom of the furnace mouth 2.
[0034] The safety laser scanner is of the SE2L-H05LP type. Compared with the contrast photoelectric detection method, the safety laser scanner occupies less space and can flexibly set the detection range, thereby preventing equipment damage or personnel casualties caused by the furnace door not being closed in time.
[0035] The safety circuit comprises a first safety relay, a second safety relay, a third safety relay, a fourth safety relay, a handheld man-machine interface EMS, and a safety button RY72. The safety circuit comprises the first safety relay, the second safety relay, the third safety relay, the fourth safety relay, and a safety relay KA.
[0036] As Figure 2As shown, the coil OSSD1 of the first safety relay is electrically connected with the fifth terminal of the safety laser scanner 1, and the coil OSSD2 of the second safety relay is electrically connected with the fourth terminal of the safety laser scanner 1. The first pin to the third pin of the safety laser scanner 1 are electrically connected with the positive pole P24B of the external power supply.
[0037] As shown in the figure, Figure 3 As shown, the twenty-first terminal of the safety relay KA is electrically connected with the twenty-second terminal of the safety relay KA through the normally open switch OSSD1_1 of the first safety relay and the normally open switch OSSD2_1 of the second safety relay connected in series. The eleventh terminal of the safety relay KA is electrically connected with the twelfth terminal of the safety relay KA through the normally open switch OSSD1_1 of the first safety relay and the normally open switch OSSD2_1 of the second safety relay connected in series.
[0038] The thirty-first terminal of the safety relay KA is electrically connected with the thirty-second terminal of the safety relay KA through the reset button PBOC, the normally closed switch RY89_2 of the fourth safety relay and the normally closed switch RY88_2 of the third safety relay connected in series. When the reset button PBOC is pressed, the fourteenth terminal and the thirteenth terminal of the safety relay KA are connected, and the twenty-fourth terminal and the twenty-third terminal of the safety relay KA are connected, so that the coil RY88 of the third safety relay and the coil RY89 of the fourth safety relay are powered.
[0039] The thirteenth terminal of the safety relay KA is electrically connected with the negative pole N24B of the external power supply through the coil RY88 of the third safety relay, and the twenty-third terminal of the safety relay KA is electrically connected with the negative pole N24B of the external power supply through the coil RY89 of the fourth safety relay.
[0040] The normally open switch OSSD1_1 of the first safety relay is provided with a handheld human-machine interface EMS and a safety button RY72 connected in series between the twenty-first terminal of the safety relay KA. The operation parameters and state information are obtained through the handheld human-machine interface EMS.
[0041] Figure 4 It is an internal structure diagram of the safety relay KA. The complete model of the safety relay KA is OMRON G9SA-301 relay. The OMRON G9SA-301 relay is prior art, and its internal circuit structure is shown, mainly for better understanding the technical scheme of the present technology, and the present utility model does not improve it.
[0042] As shown in the figure, Figure 5As shown, the twentieth pin of the servo driver U1 of the right lifting motor in the furnace door switch circuit is electrically connected with the external power supply negative pole N24B through the normally open switch RY88_1 of the third safety relay, and the twentieth pin of the servo driver U1 of the right lifting motor is electrically connected with the twentieth pin of the servo driver U1 of the right lifting motor. This circuit is the emergency stop circuit of the servo driver U1 of the right lifting motor.
[0043] The twentieth pin of the servo driver U2 of the left lifting motor in the furnace door switch circuit is electrically connected with the external power supply negative pole N24B through the normally open switch RY89_1 of the fourth safety relay, and the twentieth pin of the servo driver U2 of the left lifting motor is electrically connected with the third pin of the servo driver U2 of the left lifting motor. This circuit is the emergency stop circuit of the servo driver U2 of the left lifting motor.
[0044] It should be noted that, Figure 5 The driving circuit of the furnace door switch circuit is a prior art, and the present application does not improve it.
[0045] The working range of the furnace mouth 2 is the scanning range of the safety laser scanner 1. When the manipulator does not exit the scanning range of the safety laser scanner 1 or the foreign matter and the operating personnel are still in the scanning range of the safety laser scanner 1, the fifth terminal of the safety laser scanner 1 does not output a safety electrical signal to the coil OSSD1 of the first safety relay, the fourth terminal of the safety laser scanner 1 does not output a safety electrical signal to the coil OSSD2 of the second safety relay, the normally open switch OSSD1_1 of the first safety relay and the normally open switch OSSD2_1 of the second safety relay are kept in the open state, the safety relay KA does not supply power to the coil RY88 of the third safety relay and the coil RY89 of the fourth safety relay, the coil RY88 of the third safety relay and the coil RY89 of the fourth safety relay are not powered, and the normally open switch RY88_1 of the third safety relay and the normally open switch RY89_1 of the fourth safety relay are kept in the open state. Figure 4 It can be seen that the emergency stop circuit of the servo driver U1 of the right lifting motor and the emergency stop circuit of the servo driver U2 of the left lifting motor are disconnected, and the two driving circuits cannot form a loop, so that the furnace mouth 2 cannot be closed.
[0046] The above-mentioned mode prevents the situation that the furnace mouth 2 presses the product or the manipulator jaw or the operating personnel when the furnace mouth 2 is closed, and prevents the occurrence of equipment damage and personnel casualty events.
[0047] As Figure 6 and Figure 7As shown, the safety laser scanner 1 is mounted on the second mounting plate 4 at the bottom of the furnace mouth 2 through a support structure, the support structure comprises a first base, a second base and a triangular base 8, the safety laser scanner 1 is detachably mounted on the first base, the first base is detachably mounted on the second base, the second base is fixedly mounted on the triangular base 8, and the triangular base 8 is detachably mounted on the second mounting plate 4 of the furnace mouth 2.
[0048] The triangular base 8 is mounted on the second mounting plate 4 through a first bolt 9. The triangular base 8 and the second mounting plate 4 are detached by detaching the first bolt 9.
[0049] The first base comprises a first bottom plate 6, a first side plate 7 and two second side plates 12, the two second side plates 12 are fixedly installed on the two sides of the first bottom plate 6 respectively, the first side plate 7 is fixedly installed on the first bottom plate 6 and the two sides of the first side plate 7 are fixedly connected with the two second side plates 12 respectively, and the first bottom plate 6, the first side plate 7 and the two second side plates 12 are of an integrated structure.
[0050] The safety laser scanner 1 is mounted on the first bottom plate 6 through a second bolt 10. The safety laser scanner 1 and the first base are detached by detaching the second bolt 10.
[0051] The two second side plates 12 are provided with a taking opening 13 away from the first side plate 7. The taking opening 13 is arranged to facilitate taking the safety laser scanner 1 out of the first base.
[0052] The second base comprises a second bottom plate 14 and two third side plates 15, the two third side plates 15 are fixedly installed on the two sides of the second bottom plate 14 respectively, the second bottom plate 14 is fixedly installed in the middle of the triangular base 8, and the second bottom plate 14 and the two third side plates 15 are of an integrated structure.
[0053] The second side plate 12 of the first base is mounted on the third side plate 15 of the second base through a third bolt 11. The first base and the second base are detached by detaching the third bolt 11.
[0054] The second bolt 10 and the third bolt 11 are all lock bolts. The lock bolt is a special engineering plastic with nylon as the main component which is sprayed on the thread teeth by thermal spraying technology. When the thread is tightened, the layer of engineering plastic is extruded to generate strong counterforce and friction, thereby preventing the bolt from retreating and achieving the effect of preventing loosening.
[0055] The working principle of the utility model is:
[0056] When the mechanical arm does not exit the scanning range of the safety laser scanner 1 or the foreign matter and the operating personnel are still in the scanning range of the safety laser scanner 1, the fifth terminal of the safety laser scanner 1 does not output a safety electric signal to the coil OSSD1 of the first safety relay, the fourth terminal of the safety laser scanner 1 does not output a safety electric signal to the coil OSSD2 of the second safety relay, the normally open switch OSSD1_1 of the first safety relay and the normally open switch OSSD2_1 of the second safety relay are both kept in the open state, the safety relay KA does not supply power to the coil RY88 of the third safety relay and the coil RY89 of the fourth safety relay, the coil RY88 of the third safety relay and the coil RY89 of the fourth safety relay are both de-energized, and the normally open switch RY88_1 of the third safety relay and the normally open switch RY89_1 of the fourth safety relay are kept in the open state. Figure 4 It can be known that the emergency stop circuit of the servo driver U1 of the right lifting motor and the emergency stop circuit of the servo driver U2 of the left lifting motor are both disconnected, so that the furnace mouth 2 cannot be closed.
[0057] When there is no object in the scanning range of the safety laser scanner 1, the fifth terminal of the safety laser scanner 1 outputs a safety electric signal to the coil OSSD1 of the first safety relay, the fourth terminal of the safety laser scanner 1 outputs a safety electric signal to the coil OSSD2 of the second safety relay, the normally open switch OSSD1_1 of the first safety relay and the normally open switch OSSD2_1 of the second safety relay are both closed, the safety relay KA energizes the coil RY88 of the third safety relay and the coil RY89 of the fourth safety relay, the normally open switch RY88_1 of the third safety relay and the normally open switch RY89_1 of the fourth safety relay are both closed, the emergency stop circuit of the servo driver U1 of the right lifting motor and the emergency stop circuit of the servo driver U2 of the left lifting motor are both connected, and the furnace mouth 2 can be normally opened, normally closed or emergently closed.
[0058] The preferred embodiments of the utility model are described above, it should be pointed out that for the person skilled in the art, on the premise of not departing from the structure of the utility model, still can make a number of deformation and improvement, these will not influence the effect and the practicality of the patent of the utility model implementation.
Claims
1. A multi-layered furnace door safety pressure protection device, characterized in that, The device comprises a safety laser scanner (1) and a safety circuit, the safety circuit is electrically connected with a furnace door switch circuit, the safety laser scanner (1) is electrically connected with the safety circuit, and the safety laser scanner (1) is installed on a second mounting plate (4) at the bottom of a furnace opening (2); The safety circuit comprises a first safety relay, a second safety relay, a third safety relay, a fourth safety relay and a safety relay (KA); The coil (OSSD1) of the first safety relay is electrically connected with the fifth terminal of the safety laser scanner (1), and the coil (OSSD2) of the second safety relay is electrically connected with the fourth terminal of the safety laser scanner (1). The twenty-first terminal of the safety relay (KA) is electrically connected with the twenty-second terminal of the safety relay (KA) through the normally open switch (OSSD1_1) of the first safety relay and the normally open switch (OSSD2_1) of the second safety relay connected in series. The eleventh terminal of the safety relay (KA) is electrically connected with the twelfth terminal of the safety relay (KA) through the normally open switch (OSSD1_1) of the first safety relay and the normally open switch (OSSD2_1) of the second safety relay connected in series. The thirteenth terminal of the safety relay (KA) is electrically connected with the negative pole (N24B) of an external power supply through the coil (RY88) of the third safety relay, and the twenty-third terminal of the safety relay (KA) is electrically connected with the negative pole (N24B) of the external power supply through the coil (RY89) of the fourth safety relay. The twentieth pin of the servo driver (U1) of the right lifting motor in the furnace door switch circuit is electrically connected with the negative pole (N24B) of the external power supply through the normally open switch (RY88_1) of the third safety relay, and the twentieth pin of the servo driver (U1) of the right lifting motor is electrically connected with the twentieth pin of the servo driver (U1) of the right lifting motor; the twentieth pin of the servo driver (U2) of the left lifting motor in the furnace door switch circuit is electrically connected with the negative pole (N24B) of the external power supply through the normally open switch (RY89_1) of the fourth safety relay, and the twentieth pin of the servo driver (U2) of the left lifting motor is electrically connected with the third pin of the servo driver (U2) of the left lifting motor.
2. The multi-layered oven door safety pressure guard of claim 1, wherein, The normally open switch (OSSD1_1) of the first safety relay is provided with a handheld man-machine interface (EMS) and a safety button (RY72) connected in series between the twenty-first terminal and the eleventh terminal of the safety relay (KA).
3. The multi-layered door safety pressure protection device of claim 1, wherein, The thirty-first terminal of the safety relay (KA) is electrically connected with the thirty-second terminal of the safety relay (KA) through the reset button (PBOC), the normally closed switch (RY89_2) of the fourth safety relay and the normally closed switch (RY88_2) of the third safety relay connected in series.
4. The multi-layered door safety pressure protection device of claim 1, wherein, The safe laser scanner (1) is installed on the second mounting plate (4) at the bottom of the furnace mouth (2) through a support structure, the support structure comprises a first base, a second base and a triangular base (8), the safe laser scanner (1) is detachably installed on the first base, the first base is detachably installed on the second base, the second base is fixedly installed on the triangular base (8), and the triangular base (8) is detachably installed on the second mounting plate (4) of the furnace mouth (2).
5. The multi-layered door safety pressure protection device of claim 4, wherein, The triangular base (8) is installed on the second mounting plate (4) through a first bolt (9), and the middle part of the triangular base (8) is fixedly installed with the second base.
6. The multi-layered door safety pressure protection device of claim 4, wherein, The first base comprises a first bottom plate (6), a first side plate (7) and two second side plates (12), the two second side plates (12) are fixedly installed on the two sides of the first bottom plate (6) respectively, the first side plate (7) is fixedly installed on the first bottom plate (6), and the two sides of the first side plate (7) are fixedly connected with the two second side plates (12) respectively, and the first bottom plate (6), the first side plate (7) and the two second side plates (12) are in an integrated structure. The safe laser scanner (1) is installed on the first bottom plate (6) through a second bolt (10).
7. The multi-layered door safety pressure protection device of claim 6, wherein, The two second side plates (12) are provided with a taking opening (13) on the side away from the first side plate (7).
8. The multi-layered door safety pressure protection device of claim 6, wherein, The second base comprises a second bottom plate (14) and two third side plates (15), the two third side plates (15) are fixedly installed on the two sides of the second bottom plate (14) respectively, the second bottom plate (14) is fixedly installed in the middle part of the triangular base (8), and the second bottom plate (14) and the two third side plates (15) are in an integrated structure. The second side plate (12) is installed on the third side plate (15) through a third bolt (11).
9. The multi-layered door safety pressure protection device of claim 8, wherein, The second bolt (10) and the third bolt (11) are all lock bolts.