Hydraulic machine protection device and control system

Abstract

The utility model relates to the technical field of hydraulic machines, in particular to a hydraulic machine protection device and a control system.The hydraulic machine protection device comprises a main body mechanism, a protection mechanism is arranged on the outer side of the main body mechanism, photoelectric sensors are fully distributed around the top and the bottom of the main body mechanism, a console is arranged outside the protection mechanism, and an emergency stop switch is arranged on the console; the control system of the device comprises a protection mechanism interlocking module, a photoelectric protection system and an emergency stop system, the protection mechanism interlocking module ensures that the hydraulic machine cannot be started before the protection door is not closed correctly, so that timely maintenance and troubleshooting of faults of the protection mechanism are ensured, and the safety performance is improved; a dual-control function is provided through the emergency stop system, work of the hydraulic machine is rapidly cut off, the photoelectric protection system monitors that operators or other objects enter a pressing dangerous area, and the safety performance of the high-tonnage hydraulic machine is practically improved through triple protection.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic presses, in particular to a protection device and a control system for a hydraulic press. Background Art

[0002] High-tonnage hydraulic presses, as a kind of efficient pressure processing equipment, the core of which is to utilize the principle of liquid pressure transmission to perform work, have key applications in the production of high-strength and high-performance unidirectional non-woven fabrics and the pressing of UD plates. The equipment is operated frequently. In order to further improve its operation safety and reliability, high-tonnage hydraulic presses usually need to be equipped with advanced protection structures.

[0003] It is found through the retrieved prior art that the Chinese patent with the publication number CN220535025U discloses "a protection component for a hydraulic press". This device drives the protection plates on both sides to descend for protection when the hydraulic press is working. Through the touch plates, arc plates and springs in the protection plates, the impact force generated by the splashing parts can be effectively reduced, preventing the high-speed splashing from damaging the equipment. However, it is worth considering that the device is not timely enough in the inspection and troubleshooting of the protection plate faults, and the splashing parts caused by starting the hydraulic plate but the protection plate failing to fall in time pose a safety hazard.

[0004] Therefore, in order to solve the above problems, the emergence of a related facility that more meets the usage requirements is needed. Summary of the Invention

[0005] In view of this, the purpose of the present utility model is to provide a protection device and a control system for a hydraulic press. By setting an interlock module for the protection mechanism, it is ensured that the hydraulic press cannot be started before the protection device is correctly closed, so as to solve the problem of untimely inspection and troubleshooting of the protection plate faults.

[0006] Based on the above purpose, the present utility model provides a protection device for a hydraulic press, including a main body mechanism. A protection mechanism is arranged outside the main body mechanism. Photoelectric sensors are fixedly installed around the top and bottom of the main body mechanism. A console is arranged outside the protection mechanism, and a manual emergency stop switch is arranged on the console.

[0007] Further, the main body mechanism includes a base. Four support columns are fixedly connected to the top of the base. An installation plate is fixedly connected to the tops of the four support columns. An alarm lamp is installed at the front edge of the top of the installation plate. A hydraulic press is fixedly connected through the center of the installation plate. A hydraulic cut-off valve is arranged inside the hydraulic press. A pressing plate is fixedly installed at the bottom end of the hydraulic press. The pressing plate is rotatably connected to the support columns. A bearing plate is arranged on the side of the pressing plate away from the hydraulic press. The bearing plate is located above the base and is fixedly connected to the support columns.

[0008] Further, the protection mechanism includes four columns fixedly installed on the base. The columns are located outside the support columns. A protective wall is fixedly installed between the columns on the left, right, and rear sides of the main body mechanism. A protective door is arranged between the columns on the front side of the main body mechanism. The left side of the protective door is rotatably connected to the front left column. A bolt is arranged on the right side part of the protective door, and a pin hole matching the bolt is installed at the corresponding position on the front right column.

[0009] Further, the protective wall and the protective door are made of transparent tempered glass material, and an inductive contact detection switch is installed on the left side surface of the front right column.

[0010] Further, the photoelectric sensor includes light-emitting diodes installed on the peripheral side surfaces of the mounting plate and photoresistors installed on the base corresponding to the light-emitting diodes. A part of the photoresistors is electrically connected to the alarm lamp.

[0011] A hydraulic press protection control system includes a relay for controlling the on-off of the power supply circuit of the hydraulic press. The relay includes a normally open contact and a control coil. The normally open contact is connected to the power supply circuit of the hydraulic press, and the control coil is electrically connected to an independent power supply. The control coil is powered by the independent power supply. A protection mechanism interlock module, a photoelectric protection system, and an emergency stop system are serially arranged on the power supply circuit of the control coil.

[0012] Further, the emergency stop system includes an emergency stop switch. The emergency stop switch is a double-pole double-throw switch. One output terminal of the emergency stop switch is connected to the power supply circuit of the control coil, and the other output terminal of the emergency stop switch is connected to the power supply circuit of the hydraulic cut-off valve.

[0013] Further, the protection mechanism interlock module includes an inductive contact detection switch. The output terminal of the inductive contact detection switch is connected to the power supply circuit of the control coil.

[0014] Further, the photoelectric protection system includes a photoresistor. The photoresistor is connected to the power supply circuit of the control coil.

[0015] The beneficial effects of the present utility model:

[0016] Through the protection mechanism interlock module of the present utility model, it is ensured that the hydraulic press cannot be started before the protective door is correctly closed, which guarantees the timely inspection and troubleshooting of the protection mechanism faults and improves the safety performance.

[0017] The emergency stop system set by the present utility model provides a dual control function. When the emergency stop button is pressed, while cutting off the power supply of the hydraulic pump, the hydraulic cut-off valve is opened to cut off the supply of hydraulic oil.

[0018] The utility model is provided with a photoelectric protection system for monitoring. Once it detects that an operator or other object enters the pressing dangerous area, it will immediately trigger the shutdown protection mechanism and turn on the alarm light, effectively protecting the safety of the operator. Brief Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the main body mechanism of an embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure when the protective device of an embodiment of the utility model is opened;

[0022] Figure 4 It is a schematic diagram of the structure when the protective device of an embodiment of the utility model is closed;

[0023] Figure 5 It is a schematic diagram of the circuit control structure of the protection control system of an embodiment of the utility model.

[0024] The marks in the figure are: 1, main body mechanism; 101, base; 102, support column; 103, mounting plate; 104, hydraulic press; 105, pressing plate; 106, bearing plate; 107, hydraulic cut-off valve; 201, column; 202, protective wall; 203, protective door; 204, bolt; 205, bolt hole; 206, inductive contact detection switch; 301, light-emitting diode; 302, photoresistor; 303, alarm light; 4, control console; 5, emergency stop switch; 601, relay; 602, normally open contact; 603, independent power supply. Detailed Embodiment

[0025] To make the purpose, technical solutions and advantages of the utility model more clear and understandable, the following further details the utility model in combination with specific embodiments.

[0026] A hydraulic press protection device proposed in this embodiment, as Figures 1 - 3 shown, a protection mechanism is arranged outside the main body mechanism 1. Light-emitting diodes 301 serving as photoelectric sensor transmitters are densely arranged around the top of the main body mechanism 1, and photoresistors 302 serving as photoelectric sensor receivers are installed at corresponding positions at the bottom. An alarm light 303 is arranged at the top of the main body mechanism 1 for warning personnel in the working area to evacuate. A control console 4 is arranged outside the protection mechanism, and an emergency stop switch 5 is arranged on the control console 4.

[0027] As Figure 2As shown in the figure, the main body mechanism 1 is composed of a base 101, a support column 102, a mounting plate 103, a hydraulic press 104, a pressing plate 105 and a bearing plate 106. The mounting plate 103 is fixedly connected to the top of the support column 102. The hydraulic press 104 is centrally penetrated and installed on the mounting plate 103. A pressing plate 105 is fixedly installed at the bottom end of the hydraulic press 104. The pressing plate 105 is rotatably connected to the support column 102. A bearing plate 106 is arranged below the pressing plate 105, and the bearing plate 106 is fixedly connected to the support column 102.

[0028] As Figure 3 shown in the figure, the protection mechanism is installed outside the main body mechanism 1, including four columns 201 and three protective walls 202. A protective door 203 is arranged between the two front columns 201. The left side of the protective door 203 is rotatably connected to the front left column 201. Both the protective wall 202 and the protective door 203 are made of transparent tempered glass material. As Figure 4 shown in the figure, a bolt 204 is arranged on the protective door 203. The bolt 204 is inserted into a pin hole 205 on the front right column 201 for locking. An inductive contact detection switch 206 is installed on the left side of the front right column 201 to detect whether the protective door 203 is closed.

[0029] The control system of the above-mentioned hydraulic press protection device includes a protection mechanism interlock module, a photoelectric protection system and an emergency stop system. The circuit structure schematic diagram of this control system is as Figure 5 shown: The normally open contact 602 of the relay 601 is connected into the power supply circuit of the hydraulic press 104 to control the coil. The normally open contact 602 is connected into the power supply circuit of the hydraulic press 104. The control coil of the relay 601 is powered by an independent power supply 603. An emergency stop switch 5, an inductive contact detection switch 206 and a photoresistor 302 are connected in series on the control coil power supply circuit. Among them, the emergency stop switch 5 is a double-pole double-throw switch and is simultaneously connected into the power supply circuit of the hydraulic cut-off valve 107, corresponding to the emergency stop system; the photoresistor 302 is a component of the alarm lamp 303 circuit and is used to control the operation of the alarm lamp 303, corresponding to the photoelectric protection system. The inductive contact detection switch 206 is used to detect whether the protective door 203 is closed, corresponding to the protection mechanism interlock module.

[0030] Working process and principle: When the device of the present utility model starts to work, the emergency stop switch 5 is in a closed state, the protective door 203 is closed, and it is ensured that the bolt 204 on the protective door 203 is inserted into the pin hole 205. At this time, the inductive contact detection switch 206 detects that the protective door 203 is closed, the switch is closed, the control coil is normally powered on, and the normally open contact 602 is closed; the light-emitting diode 301 is turned on to monitor whether there are people or objects within the working range. If there are people or objects, the photoresistor 302 is blocked, the resistance value increases, and the output voltage of the photoresistor 302 is compared with the reference voltage through the voltage comparator. At this time, the voltage of the photoresistor 302 is lower than the set threshold value, and the relay 601 module receives the output signal of the comparator and disconnects the normally open contact 602. If there are no people and objects entering the monitoring area, the normally open contact 602 is closed, and at this time, the hydraulic pump can be normally powered, and the hydraulic press 104 works normally.

[0031] When an emergency occurs, press the emergency stop switch 5. On the one hand, the power supply circuit of the control coil of the relay 601 is disconnected, the normally open contact 602 is disconnected, and the hydraulic pump stops working. On the other hand, the hydraulic cut-off valve 107 is disconnected to prevent the oil in the hydraulic press 104 from flowing continuously. The dual control makes the hydraulic press 104 stop working.

Claims

1. A hydraulic press protection device, comprising a main body mechanism (1), characterized in that, A protection mechanism is provided outside the main body mechanism (1). Photoelectric sensors are fixedly installed around the top and bottom of the main body mechanism. A control console (4) is provided outside the protection mechanism, and an emergency stop switch (5) is provided on the control console (4).

2. The hydraulic press protection device according to claim 1, characterized in that, The main body mechanism (1) includes a base (101). Four support columns (102) are fixedly connected to the top of the base (101). An installation plate (103) is fixedly connected to the top of the four support columns (102). An alarm lamp (303) is installed at the front edge of the top of the installation plate (103). A hydraulic press (104) is fixedly connected through the center of the installation plate (103). A hydraulic cut-off valve (107) is arranged inside the hydraulic press. A pressing plate (105) is fixedly installed at the bottom end of the hydraulic press (104). The pressing plate (105) is rotatably connected to the support column (102). A bearing plate (106) is arranged on one side of the pressing plate (105) away from the hydraulic press (104). The bearing plate (106) is located above the base (101) and is fixedly connected to the support column (102).

3. The hydraulic press protection device according to claim 2, characterized in that, The protection mechanism includes four columns (201) fixedly installed on the base (101). The columns (201) are located outside the support columns (102). Protection walls (202) are fixedly installed between the columns (201) on the left, right, and rear sides of the main body mechanism (1). A protection door (203) is arranged between the columns (201) on the front side of the main body mechanism (1). The left side of the protection door (203) is rotatably connected to the front left column (201). A bolt (204) is arranged on the right side of the protection door (203). A pin hole (205) matching the bolt (204) is installed at the corresponding position on the front right column (201).

4. The hydraulic press protection device according to claim 3, characterized in that, The protection walls (202) and the protection door (203) are made of transparent tempered glass material. An inductive contact detection switch (206) is installed on the left side surface of the front right column (201).

5. The hydraulic press protection device according to claim 4, characterized in that, The photoelectric sensor includes light-emitting diodes (301) installed on the peripheral side surfaces of the installation plate (103) and photoresistors (302) installed on the base (101) corresponding to the light-emitting diodes (301). The photoresistors (302) are electrically connected to the alarm lamp (303).

6. Adopt the hydraulic press protection device according to any one of claims 1 to 5. A hydraulic press protection control system includes a relay (601) for controlling the on / off of the power supply circuit of the hydraulic press (104), and is characterized in that, The relay (601) includes normally open contacts (602) and a control coil. The normally open contacts (602) are connected into the power supply circuit of the hydraulic press (104). The control coil is electrically connected to an independent power supply (603). The control coil is powered by the independent power supply (603). A protection mechanism interlock module, a photoelectric protection system, and an emergency stop system are connected in series on the power supply circuit of the control coil.

7. The hydraulic press protection control system according to claim 6, characterized in that, The emergency stop system includes an emergency stop switch (5). The emergency stop switch (5) is a double-pole double-throw switch. One output terminal of the emergency stop switch (5) is connected into the power supply circuit of the control coil. The other output terminal of the emergency stop switch (5) is connected into the power supply circuit of the hydraulic cut-off valve (107).

8. The hydraulic press protection control system according to claim 6, characterized in that, The protection mechanism interlock module includes an inductive contact detection switch (206). The output terminal of the inductive contact detection switch (206) is connected into the power supply circuit of the control coil.

9. The hydraulic press protection control system according to claim 6, wherein, The photoelectric protection system includes a photoresistor (302), and the photoresistor (302) is connected to the control coil power supply circuit.

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