Safety door lock system special for smart factory and detection feedback control method

Abstract

The invention discloses a special safety door lock system for a smart factory and a detection feedback control method. The system comprises a door lock body, a special-shaped bolt and a proximity switch group, the door lock body is fixedly mounted at a preset position on a left side production line equipment protection door; the angle steel base is welded to a preset position on a right production line equipment protection door and used for installing the special-shaped plug pin and the proximity switch set. A bolt detection control function on the door lock body side is started and switched through a key change-over switch, and when a proximity switch group detects that the position of a bolt is abnormal, an I-gear primary bolt detection control function provides a bolt position abnormity lamp display indication and a contact condition or control output by a normal state detection relay; the device can be connected in series or combined with a door machine interlocking function of a safety door lock system for design and application, and can also be directly applied to a safety electrical hard control loop of production line equipment; besides the I-gear function, the II-gear secondary bolt detection control function can enable the door lock body to directly output response through corresponding control when the bolt is seriously dislocated, and can directly limit operation and use of production line equipment.

Description

Technical Field

[0001] The present application relates to the field of safety door locks for controlling automated production lines and numerical control equipment in smart factories, and specifically to a safety door lock system and detection feedback control method for smart factories. Background Art

[0002] With the extensive use of automated production lines and CNC equipment, the increasing demand for smart factory construction and the rigid requirements for safe production, the safe use of production line equipment has become particularly important, and the application of safety door locks has become more and more popular. Safety door locks are generally installed and applied to the protective doors (rails) of production line equipment. The protective doors are used to isolate, protect and form processing areas. Safety door locks have the functions of locking doors, door switches, and door lock detection. They are designed and controlled in series with the relevant operations or use functions of production line equipment through door machine interlocking to achieve the purpose of safe use. Most of the existing ordinary door locks use a split-type bolt design, but they can only be used independently, have a single function and cannot achieve a closed feedback loop at the bolt detection end. The bolt is fixedly installed on the side of the protective door. During use, the bolt will loosen or even fall off due to frequent mechanical actions. The loose bolt not only makes it difficult for the mechanical bolt to operate, but also causes damage to the door lock body if it is used continuously in this state. When the latch is seriously dislocated or falls off, the operator may choose to break through the safety restrictions of the door lock and disengage the latch to directly insert the door lock to meet the signal requirements of the door lock at the production line equipment end in order to continue to use or operate the equipment conveniently, resulting in a false lock of the door lock. At the same time, unauthorized personnel can also enter the processing area at will in this dangerous manner, which is extremely inconsistent with the safety production requirements of smart factories for unattended operation, and brings huge hidden dangers to the safe use of production line equipment. The necessary condition for the real lock of the door lock is that the latch is in a real and correct physical position.

[0003] In order to avoid and solve this risk, it is urgent to design a smart factory-specific safety door lock system and method with detection feedback control function, which can detect the real position of the bolt, form a detection end feedback loop, and confirm the real and correct physical position of the bolt on the protective door side and the authenticity of the door lock before the corresponding production line equipment function can be used; at the same time, the bolt position status can be grasped in real time, and external indications, conditional output functions, etc. can be provided through corresponding feedback control. Combined with the control system of the production line equipment, it can also be used to limit the operation and use of some functions of the production line equipment when the door lock is not truly locked. The present invention enhances the reliability of the door machine interlocking application, ensures the safe use of production line equipment, and strengthens the safety construction of smart factories. It can also timely repair or adjust the position of the abnormal state of the bolt according to the prompt, avoiding damage caused by excessive use of the door lock in an abnormal state. Summary of the invention

[0004] In response to the risks to the safe use of production line equipment caused by the possibility of false locking of door locks, and the inability of existing door locks to detect, respond, control the actual physical position of the bolt and form a detection-end feedback loop, this application proposes a smart factory-specific safety door lock system and detection feedback control method.

[0005] In a first aspect, the present invention provides a smart factory-specific safety door lock system with a detection feedback control function, the system comprising: a door lock body 1, a special-shaped latch 2, and a proximity switch group 3;

[0006] The door lock body 1 is fixedly installed at a preset position on the left production line equipment protection door 6; the angle steel seat 4 is welded to a preset position on the right production line equipment protection door 5 for installing the special-shaped latch 2 and the proximity switch group 3.

[0007] Furthermore, the door lock body 1 is provided with a latch position detection indicator light 11, an air connection socket 12, a key conversion switch 13 and a lock head 14. The latch position detection indicator light 11 transmits the light display state to the visible outer surface of the door lock body 1 through a light-guiding plastic rod; the air connection socket 12 is provided on the bottom surface of the door lock body 1, and the key conversion switch 13 is a three-gear design, which enables and switches the latch detection control function, and the lock head 14 and the special-shaped latch 2 complete the mechanical latch;

[0008] The key switch is used to enable and switch the latch detection control function on the door lock body; the aviation socket is used to plug the proximity switch and realize the latch position detection signal input; the latch position detection indicator directly feedbacks whether the latch position status is normal or not;

[0009] Furthermore, the special-shaped latch 2 is provided with a vertical boss 21 and a horizontal boss 22, and the special-shaped latch 2 is installed and fastened to the angle steel seat 4 using a threaded fastener, and the position of the special-shaped latch 2 corresponds to the lock head 14;

[0010] A vertical ear piece 41 and a horizontal ear piece 42 are respectively provided on the angle steel seat 4 corresponding to the vertical boss 21 and the horizontal boss 22; the vertical proximity switch 31 is installed on the vertical ear piece 41 to detect the vertical boss 21, and the horizontal proximity switch 32 is installed on the horizontal ear piece 42 to detect the horizontal boss 22.

[0011] Furthermore, a proximity switch group control relay, a latch position normal detection relay, a latch dislocation detection relay, a control intermediate relay and an electromagnet push rod mechanism are arranged inside the door lock body 1;

[0012] The proximity switch group control relay is used for the control output of the proximity switch group detection signal, and includes a group of normally open and normally closed contacts; the normal detection relay for the latch position is used for the feedback output of the latch position detection by the safety door lock system under normal conditions according to the contact switch signal output by the proximity switch group control relay, and also includes a group of normally open and normally closed contacts; the latch dislocation detection relay is used to detect whether the latch is dislocated according to the contact switch signal output by the proximity switch group control relay; the electromagnet push rod mechanism controls the push rod to move downward and limit the position through the electromagnet push rod control circuit, and can independently maintain the contact position of the door switch contact group of the door lock body.

[0013] In a second aspect, the present invention also provides a detection feedback control method for a smart factory dedicated safety door lock system, which is applied to the system, wherein the electrical control circuit arranged inside the door lock body includes a proximity switch group control circuit, a latch position normal detection control circuit, a latch dislocation detection control circuit, and an electromagnet push rod control circuit;

[0014] The method comprises:

[0015] The latch detection control function on the door lock body side is enabled and switched through the key switching switch. When the proximity switch group detects that the latch position is abnormal, the primary latch detection control function of gear I provides a lamp indication of abnormal latch position and contact conditions for the normal detection relay output through the latch position normal detection control circuit; the secondary latch detection control function of gear II has the function of gear I through the latch position normal detection control circuit, the latch dislocation detection control circuit and the electromagnet push rod control circuit. In addition to having the function of gear I, it can also make the door lock body directly output a response and directly limit the operation and use of the production line equipment through corresponding control when the latch is seriously dislocated.

[0016] Furthermore, in the control circuit of the proximity switch group:

[0017] Each proximity switch of the proximity switch group is an inductive three-wire PNP normally open type, and each control relay of the proximity switch group is electrically controlled and wired accordingly. The vertical proximity switch 31 detects that the vertical position of the special-shaped plug 2 is correct, controls the vertical proximity switch control relay 15 coil to be energized, and the KA1 normally open contact 151 is closed, otherwise it remains disconnected; the horizontal proximity switch 32 detects that the horizontal position of the special-shaped plug 2 is correct, controls the horizontal proximity switch control relay 16 coil to be energized, and the KA2 normally open contact 161 is closed, otherwise it remains disconnected.

[0018] Furthermore, in the latch position normal detection control loop:

[0019] The two contacts at the fully open positions of the I and II gears in the key switch 13 are connected in series with the KA1 normally open contact 151, the KA2 normally open contact 161 and the control coil of the latch position normal detection relay 17, and the control coil of the latch position normal detection relay 17 is connected in parallel with the latch position detection indicator light 11;

[0020] The control process of the latch position normal detection control circuit is as follows: the key-changing switch 13 wiring contact group is in the full-through position of gear position I and gear position II. Only when the KA1 normally open contact 151 and the KA2 normally open contact 161 are closed, the latch position detection indicator light 11 is controlled to light up and the latch position normal detection relay 17 coil is energized, otherwise the controlled indicator light 11 is off and the controlled coil is de-energized; the latch position normal detection relay 17 coil is energized, the KA normally closed contact 172 is disconnected, and the KA normally closed contact 172 is closed when it is de-energized.

[0021] Furthermore, in the latch dislocation detection control circuit:

[0022] The two contacts of the key switch 13 in the ON position of gear II are connected in series with the KA1 normally open contact 151 and the control coil of the latch dislocation detection relay 18, and the KA2 normally open contact 161 is connected in parallel with the KA1 normally open contact 151;

[0023] The control process of the latch dislocation detection control circuit is as follows: when the key-changing switch 13 wiring contact group is in the II gear on position and at least one of the KA1 normally open contact 151 and the KA2 normally open contact 161 combination is closed, the control latch dislocation detection relay 18 coil is energized; only when the KA1 normally open contact 151 and the KA2 normally open contact 161 are both kept disconnected, the latch dislocation detection relay 18 coil is not energized; when the latch dislocation detection relay 18 coil is energized, the KA3 normally closed contact 182 is disconnected; when the KA3 normally closed contact 182 is powered off, it is closed.

[0024] Furthermore, the door lock body 1 includes a mechanical push rod 111 and a door switch contact group 112. An electromagnet push rod 110 is installed on the right side of the mechanical push rod 111, and the mechanical action is completed by cooperating with the elastic contact 1121 on the door switch contact group 112 which is laterally extended;

[0025] When the electromagnet of the electromagnet push rod 110 is energized, the electromagnet push rod 110 can independently press the elastic contact 1121 to put the door switch contact group 112 in and maintain the door open detection state; when the electromagnet of the electromagnet push rod 110 is de-energized, the electromagnet push rod 110 resets itself by its own elastic force, and the elastic contact 1121 is still controlled solely by the mechanical push rod 111 of the door lock body.

[0026] Furthermore, in the solenoid push rod control circuit:

[0027] The two contacts of the key switch 13 in the only II gear on position are connected in series with the KA3 normally closed contact 182, the intermediate relay 19 control coil and the solenoid control coil of the solenoid push rod 110, and the KA normally closed contact 172 is connected in series with the KA4 normally open contact 191 and connected in parallel with both ends of the KA3 normally closed contact 182;

[0028] The control process of the electromagnet push rod control circuit is as follows: the key-changing switch 13 wiring contact group is in the II gear on position, and it can only be connected when it is in the II gear; when the KA3 normally closed contact 182 remains closed, the control electromagnet push rod 110 electromagnet is energized, and at the same time the intermediate relay 19 is energized and controls the KA4 normally open contact 191 to close; at this time, the KA normally closed contact 172 is connected in series with it to realize the self-locking maintenance of the circuit, and only when the KA normally closed contact 172 is disconnected, the control electromagnet push rod 19 electromagnet is not energized.

[0029] The beneficial effects of the present application are: 1) The overall design is reasonable, sophisticated and compact, and most of the ordinary door locks used in existing production line equipment can be adaptively modified and upgraded according to this solution. 2) The gear application of the key conversion switch and the corresponding electrical control circuit design allow users to selectively enable and switch different bolt detection control functions according to their needs, ensuring differentiated and diversified use under different scenarios or requirements. 3) The authority design of the key conversion switch ensures that the bolt detection control function can only be turned on, switched or turned off by relevant authorized personnel, so that the application of the bolt detection control function will not be manually interfered with by other unrelated personnel, ensuring the safety and reliability of the use of this function. 4) The direct connection between the proximity switch group and the door lock body makes the safety door lock system closed-loop and forms the shortest wiring. 5) The installation and position setting of the proximity switch group on the protective door side of the production line equipment where the special-shaped bolt is located ensures the authenticity and accuracy of the physical position detection of the bolt. 6) The double boss special-shaped design of the bolt and its application in conjunction with the proximity switch group can limit the possibility of false locking signals and artificial shielding of the door lock to a certain extent, avoiding interference from external conditions, and can also determine whether the position status of the bolt is generally abnormal or seriously disengaged based on the detection distance, position setting and corresponding detection signal output combination of the two proximity switches. 7) The application of the bolt position detection indicator light makes it easy to directly grasp the bolt position status. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a diagram showing the application of the safety door lock system to the push-pull protective door of production line equipment;

[0031] Figure 2 This is a schematic diagram of the front axonometric view of the door lock body of the safety door lock system;

[0032] Figure 3 This is a schematic diagram of the application of the special-shaped bolt and the proximity switch group of the safety door lock system;

[0033] Figure 4 Schematic diagram of the electrical wiring of the control relay circuit of the proximity switch group of the safety door lock system Figure 1 ;

[0034] Figure 5 Schematic diagram of the electrical wiring of the control relay circuit of the proximity switch group of the safety door lock system Figure 2 ;

[0035] Figure 6 This is a schematic diagram of the electrical principle of the normal detection control circuit of the latch position of the safety door lock system;

[0036] Figure 7 This is a schematic diagram of the electrical principle of the latch dislocation detection control circuit of the safety door lock system;

[0037] Figure 8 This is the electrical principle diagram of the electromagnetic push rod control circuit of the safety door lock system;

[0038] Fig. 9 It is a schematic diagram of the electromagnetic push rod mechanism of the safety door lock system and its application;

[0039] Fig.10 It is a schematic diagram of the operation flow of the safety door lock system;

[0040] Explanation of numbers in the figure: 1 door lock body, 2 special-shaped bolt, 3 proximity switch group, 4 angle steel seat, 5 right production line equipment protection door, 6 left production line equipment protection door, 11 bolt position detection indicator light, 12 aviation connection socket, 13 key conversion switch, 14 lock head, 15 vertical proximity switch control relay, 151KA1 normally open contact, 16 horizontal proximity switch control relay, 161KA2 normally open contact, 17 bolt position normal detection relay, 172KA normally closed contact, 18 bolt dislocation detection relay, 182KA3 normally closed contact, 19 intermediate relay, 191KA4 normally open contact, 110 electromagnet push rod, 111 mechanical push rod, 112 door switch contact group, 1121 elastic contact, 21 vertical boss, 22 horizontal boss, 31 vertical proximity switch, 32 horizontal proximity switch, 41 vertical ear piece, 42 horizontal ear piece. DETAILED DESCRIPTION

[0041] The present application is further described in detail below in conjunction with the accompanying drawings of the embodiments.

[0042] The embodiment of the present invention provides a safety door lock system and method for a smart factory, which provides external indications, conditional output functions, etc. through the classification design of detection control functions, selection of applications, and specific design and detection judgment of the actual physical position of the bolt, and provides external indications and conditional output functions through corresponding feedback control. It can also directly output responses in combination with the control system of the production line equipment to form a closed loop. The safety door lock system consists of a door lock body, a special-shaped bolt, and a proximity switch group. The door lock body includes a door lock box body side, a bolt lock head, etc., which adopt a universal design, and is provided with a key conversion switch, two aviation connection sockets, and a bolt position detection indicator light. The proximity switch group control relay, the bolt position normal detection relay, the bolt dislocation detection relay, the control intermediate relay, and the electromagnet push rod mechanism are arranged inside, and the corresponding electrical control circuit is designed and configured. The key switching switch is used to enable and switch the bolt detection control function on the door lock body side; the aviation connection socket is used to plug the proximity switch and realize the input of the bolt position detection signal; the bolt position detection indicator light can directly feedback whether the bolt position status is normal or not on the visible surface of the door lock body; the electrical control circuit set inside the door lock body includes a proximity switch group control relay circuit, a bolt position normal detection control circuit, a bolt dislocation detection control circuit and an electromagnet push rod control circuit; the proximity switch group control relay is used for the control output of the proximity switch group detection signal, including a group of normally open and normally closed contacts; the bolt position normal detection relay is used for the feedback output of the bolt position detection of the safety door lock system under normal conditions according to the contact switch signal output by the proximity switch group control relay, and also includes a group of normally open and normally closed contacts; the bolt dislocation detection relay is used for the detection output of the bolt dislocation according to the contact switch signal output by the proximity switch group control relay; the electromagnet push rod mechanism controls the push rod to move downward and limit through the electromagnet push rod control circuit, and can independently maintain the contact position of the door switch contact group of the door lock body. The special-shaped bolt is a bolt body with two bosses at different positions, directions and heights, which are used to cooperate with the proximity switch group to detect the bolt position, and can ensure the installation and detection position of each proximity switch without affecting the mechanical bolt lock. The proximity switch group contains two inductive three-wire PNP normally open proximity switches, which are used to detect the position status of the bolt in different directions. The detection signal is output to the relevant electrical control circuit inside the door lock body through the proximity switch group control relay.

[0043] Example 1

[0044] A special safety door lock system and method for a smart factory equipped with a detection feedback control function, wherein the door lock body and the special-shaped latch are adaptively mounted and fixed to the protective door at appropriate positions according to the opening form (flat opening or push-pull type) of the protective door of the production line equipment. The push-pull type is preferably used as an example in the present invention. The two proximity switches of the proximity switch group are installed and fixed on the protective door side position (angle steel seat) where the special-shaped latch is located, and the designed boss of the special-shaped latch is detected through reasonable arrangement to reflect the real physical position state of the latch, and its cable plug is respectively connected to each aviation connection socket of the door lock body. When the position of the special-shaped latch is incorrect in both directions, it is regarded as a latch dislocation, and the latch falling off is a serious latch dislocation; when both are correct, it is regarded as a normal latch position; when only one position is incorrect, it can be regarded as a loose latch; when at least one position is incorrect, it is regarded as an abnormal latch position.

[0045] When in use, the safety door lock system is powered, and the proximity switch group detects the real physical position of the bolt in real time and controls the relay control output through the proximity switch group. When the key switch is set to position O, the bolt detection control function is not enabled. At this time, all other basic functions of the safety door lock system can be used normally. When the key switch is set to position I, the primary bolt detection control function is enabled. At this time, the bolt position detection indicator light display and the bolt position normal detection relay output are controlled by the bolt position normal detection control circuit; when the bolt position is normal, the indicator light is on and the normal detection relay coil is energized, otherwise the bolt position is abnormal, the indicator light is off and the normal detection relay coil is de-energized; the contact opening and closing state of the normal detection relay output can be used as an input condition and connected in series with the contact switch signal related to the door lock body or combined with the door machine interlock design, and the soft control acts on the safe use function of the production line equipment, such as prompting the abnormal bolt position through the equipment CNC system and limiting related functions. The key changeover switch is placed in position II, the primary latch detection control function is maintained and the secondary latch detection control function is enabled, the latch dislocation detection control circuit controls the output of the latch dislocation detection relay, when the latch is seriously dislocated, the relay controlled by the proximity switch group and the latch dislocation detection relay shall not be energized, then the electromagnet push rod control circuit controls the electromagnet push rod to move downward and act on the elastic contact of the door switch contact group of the door lock body, that is, the electromagnet push rod is energized, quickly moves downward a distance δ, presses the elastic contact and keeps its mechanical position, so that the switch signals of each contact of the door switch contact group are immediately maintained in the door open state, and at the same time, the basic functions of the safety door lock and the corresponding door machine interlock design are used to hard control the safe use function of the production line equipment, that is, the door lock body itself outputs a response related to the door open state and limits the corresponding function; when the latch position returns to normal, the electromagnet push rod loses power and resets by its own elastic force, and the elastic contact of the door switch contact group is controlled separately by the original mechanical push rod mechanism of the door lock body, and the safety door lock system is applied under the condition that the latch position state is normal.

[0046] When the proximity switch group detects an abnormal position of the latch, position I provides a light indication and contact conditions or control for the normal detection relay output; in addition to the functions of position I, position II can also directly output a response and restrict use by maintaining the door switch contact group and the door open state without interfering with the basic control functions of the door lock when the latch is seriously dislocated. For serious dislocation of the latch in position II, if no mechanical maintenance and adjustment are performed to restore the latch position to normal, the safety door lock system will always be in the application mode of the door open state to restrict the operation of the production line equipment. The door open state is the top priority condition for the safety door lock to restrict the use of the function when the door interlock is applied, thus ensuring the specificity and reliability of the response control.

[0047] Example 2

[0048] A smart factory-specific safety door lock system and method configured with a detection feedback control function, the safety door lock system consists of a door lock body 1, a special-shaped bolt 2, a proximity switch group 3 and related accessories. The door lock body 1 is provided with a bolt position detection indicator 11, an air connection socket 12 and a key conversion switch 13, and a vertical position proximity switch control relay 15, a horizontal position proximity switch control relay 16, a bolt position normal detection relay 17, a bolt dislocation detection relay 18, an intermediate relay 19 and an electromagnet push rod 110 mechanism are arranged inside, and a corresponding electrical control circuit is designed and configured for related function control. The door lock body 1 and the special-shaped bolt 2 are adaptively assembled and fixed with the protective door in a suitable position according to the opening form of the protective door of the production line equipment. Each proximity switch of the proximity switch group 3 is respectively installed and fixed on the side angle steel seat 4 of the protective door where the special-shaped bolt 2 is located, and the designed boss of the special-shaped bolt 2 is detected through reasonable arrangement to reflect the real physical position state of the bolt, and its cable plug is respectively connected with each air connection socket 12 of the door lock body 1. The electrical control circuit arranged inside the door lock body 1 includes a proximity switch group control relay circuit, a latch position normal detection control circuit, a latch dislocation detection control circuit and an electromagnet push rod control circuit.

[0049] Through the specific design and detection of the actual physical position of the bolt, combined with the judgment and application process, the necessary conditions for the real locking of the safety door lock system are mastered.

[0050] Through the diversified selection and application of detection signal combination feedback, different closed-loop control effects are achieved, which is convenient for users to implement according to production needs.

[0051] The special-shaped latch 2 can be processed or equipped with a vertical boss 21 and a horizontal boss 22 according to its installation method, possible movement direction and movement amount, so as to cooperate with the proximity switch group 3 to detect its position, which can limit the provision of false locking signals of the door lock and the possibility of artificial shielding to a certain extent and avoid interference from external conditions.

[0052] The proximity switch group 3 includes a vertical proximity switch 31 and a horizontal proximity switch 32, which are respectively adaptively mounted with the vertical ear piece 41 and the horizontal ear piece 42 of the angle steel seat 4 welded on the right production line equipment protection door 5, and the authenticity and accuracy of the physical position detection of the special-shaped plug 2 are ensured through the adaptive selection and installation position setting. The preferred embodiment uses the inductive three-wire PNP normally open type.

[0053] The combined design and application facilitates rapid and reasonable position debugging according to different sensor parameters to achieve accurate detection functions.

[0054] The coordinated application of the special-shaped bolt 2 and the proximity switch group 3 can be used to determine whether the position state of the special-shaped bolt 2 is generally abnormal or seriously disengaged according to their corresponding detection signal output combinations.

[0055] The bolt position detection indicator light 11 provided on the door lock body 1 is controlled by a bolt position normal detection control circuit, and its light display state on the visible outer surface of the door lock body 1 facilitates direct inspection and grasp of the position state of the special-shaped bolt 2. This preferred embodiment uses a green LED indicator light.

[0056] The gear application of the key changeover switch 13 provided in the door lock body 1 and the corresponding electrical control circuit design allow the user to selectively enable and switch different latch detection control functions according to needs, thereby ensuring differentiated, diversified applications and wide use in different scenarios or requirements.

[0057] The authority design of the key switching switch 13 provided in the door lock body 1 ensures that the latch detection control function can only be opened, switched or closed by relevant authorized personnel, so that the application of the latch detection control function will not be interfered with by other irrelevant personnel, ensuring the safety and reliability of the use of this function.

[0058] The bolt detection control function includes the primary bolt detection control function and the secondary bolt detection control function. When the proximity switch group 3 detects that the position of the special-shaped bolt 2 is abnormal, the I gear provides the bolt position detection indicator 11 to indicate and the contact condition or control output of the bolt position normal detection relay 17; in addition to the I gear function, the II gear can also directly output the response and restrict the operation and use of the production line equipment by maintaining the door switch contact group 112 in the door open state without interfering with the basic control function of the door lock when the special-shaped bolt 2 is seriously dislocated. If the mechanical maintenance and adjustment are not performed to make the position of the special-shaped bolt 2 normal, the safety door lock system will always be in the application mode of the door open state, and the door open state is the top priority condition for the safety door lock to restrict the use of the function when the door machine interlock is applied, thus ensuring the specificity and reliability of the response control.

[0059] The electromagnet push rod 110 provided in the door lock body 1 is fixedly installed inside the door lock body 1, and completes its mechanical action through the lateral extension of the elastic contact 1121, and has a certain travel limit. When the electromagnet of the electromagnet push rod 110 is energized, the electromagnet push rod 110 can independently press the elastic contact 1121 to make the door switch contact group 112 in and maintain the door opening detection state; when the electromagnet of the electromagnet push rod 110 is de-energized, the electromagnet push rod 110 is reset by its own elastic force.

[0060] Whether the electromagnet push rod 110 provided on the door lock body 1 is energized is controlled by the electromagnet push rod control circuit. The design of the electromagnet push rod control circuit has a certain circuit self-locking function, which ensures that the electromagnet push rod 110 is energized when both the vertical proximity switch control relay 15 and the horizontal proximity switch control relay 16 are not energized; the electromagnet push rod 110 is de-energized when both the vertical proximity switch control relay 15 and the horizontal proximity switch control relay 16 are energized.

[0061] The latch position normal detection control circuit uses a series design of the proximity switch group 3 signals, and only uses the normally open contact closure of the latch position normal detection relay 17 as the correct position detection signal, ensuring reliability.

[0062] The latch dislocation detection control circuit adopts the parallel design of the signal of the proximity switch group 3, and only uses the normally open contact of the latch dislocation detection relay 18 to remain disconnected as a severe dislocation detection satisfaction signal, thereby ensuring reliability.

[0063] Example 3

[0064] See attached Figure 1 ,A smart factory-specific safety door lock system with detection feedback control function consists of a door lock body 1, a special-shaped bolt 2, a proximity switch group 3 and related accessories. The opening form of the production line equipment protection door shown in the figure is a push-pull type. The left production line equipment protection door 6 is fixed or connected to the production line equipment. The right production line equipment protection door 5 slides horizontally in the left and right directions. The door lock body 1 and the special-shaped bolt 2 are adaptively assembled and fixed with the protection door at appropriate positions. The door lock body 1 is fixedly installed at a certain position on the left production line equipment protection door 6; the angle steel seat 4 is welded to a certain position on the right production line equipment protection door 5, which is used to install the special-shaped bolt 2 and the proximity switch group 3.

[0065] See attached Figure 2The door lock body 1 is provided with a bolt position detection indicator 11, an air connection socket 12 and a key switch 13. The bolt position detection indicator 11 is a green LED indicator, which transmits the light display status to the visible outer surface of the door lock body 1 through a light-guiding plastic rod; the air connection socket 12 is provided on the bottom surface of the door lock body 1 to avoid excessive interference with the movable door body during electrical connection; the key switch 13 is a three-position design to enable and switch the bolt detection control function. The lock head 14 and the special-shaped bolt 2 complete the mechanical latch.

[0066] See attached Figure 3 The special-shaped bolt 2 is processed or assembled with a vertical boss 21 and a horizontal boss 22, and is installed and fastened to the angle steel seat 4 using threaded fasteners, and its position corresponds to the lock head 14; the angle steel seat 4 is provided with a vertical ear piece 41 and a horizontal ear piece 42 at a certain position; the vertical proximity switch 31 is installed on the vertical ear piece 41 to detect the vertical boss 21, and the horizontal proximity switch 32 is installed on the horizontal ear piece 42 to detect the horizontal boss 22. The installation method, possible movement direction and movement amount of the special-shaped bolt 2 must be considered to design its double boss, and the detection distance and area of ​​the proximity switch must be considered to adapt and select the corresponding proximity switch. When applied, the components are adaptively assembled and fixed.

[0067] See attached Figure 4 and Figure 5 , Each proximity switch of the proximity switch group is an inductive three-wire PNP normally open type. Each control relay of the proximity switch group is electrically controlled and wired accordingly. The power supply is directly supplied by the power supply branch of the safety door lock system and is 24V DC. The vertical proximity switch 31 detects that the vertical position of the special-shaped bolt 2 is correct, controls the coil of the vertical proximity switch control relay 15 to be energized, and the normally open contact 151 of KA1 is closed, otherwise it remains disconnected; the horizontal proximity switch 32 detects that the horizontal position of the special-shaped bolt 2 is correct, controls the coil of the horizontal proximity switch control relay 16 to be energized, and the normally open contact 161 of KA2 is closed, otherwise it remains disconnected.

[0068] See attached Figure 6, the two contacts at the full-through position of the I and II gears in the key switch 13 are connected in series with the KA1 normally open contact 151, the KA2 normally open contact 161 and the control coil of the bolt position normal detection relay 17, and the control coil of the bolt position normal detection relay 17 is connected in parallel with the bolt position detection indicator light 11. The control process of the bolt position normal detection control circuit is as follows: the wiring contact group of the key switch 13 is in the full-through position of the I and II gears, and it is connected when it is placed in the I or II gears; only when the KA1 normally open contact 151 and the KA2 normally open contact 161 are closed, the green LED of the control bolt position detection indicator light 11 lights up and the bolt position normal detection relay 17 coil is energized, otherwise the controlled LED goes out and the controlled coil loses power. When the bolt position normal detection relay 17 coil is energized, the KA normally closed contact 172 is disconnected; when it loses power, the KA normally closed contact 172 is closed.

[0069] See attached Figure 7 , the two contacts of the key switch 13 in the only gear II on position are connected in series with the KA1 normally open contact 151 and the control coil of the latch dislocation detection relay 18, and the KA2 normally open contact 161 is connected in parallel with the KA1 normally open contact 151. The control process of the latch dislocation detection control circuit is as follows: the key switch 13 wiring contact group is in the gear II on position, and it can only be connected when it is placed in the gear II; when at least one of the KA1 normally open contact 151 and the KA2 normally open contact 161 combination is closed, the control latch dislocation detection relay 18 coil is energized; only when the KA1 normally open contact 151 and the KA2 normally open contact 161 are both disconnected, can the latch dislocation detection relay 18 coil be guaranteed not to be energized (de-energized). When the latch dislocation detection relay 18 coil is energized, the KA3 normally closed contact 182 is disconnected; when de-energized, the KA3 normally closed contact 182 is closed.

[0070] See attached Figure 8 , the two contacts of the key switch 13 in the position of only the II gear on are connected in series with the KA3 normally closed contact 182, the intermediate relay 19 control coil and the electromagnet push rod 110 electromagnet control coil, and the KA normally closed contact 172 is connected in series with the KA4 normally open contact 191 and connected in parallel with the two ends of the KA3 normally closed contact 182. The control process of the electromagnet push rod control circuit is as follows: the key switch 13 wiring contact group is in the II gear on position, and it can only be connected when it is placed in the II gear; when the KA3 normally closed contact 182 remains closed, the control electromagnet push rod 110 electromagnet is energized, and at the same time the intermediate relay 19 is energized and controls the KA4 normally open contact 191 to close; at this time, the KA normally closed contact 172 is connected in series with it to realize the self-locking maintenance of the circuit, and only when the KA normally closed contact 172 is disconnected, the control electromagnet push rod 19 electromagnet is not energized (power lost).

[0071] See attached Fig. 9, the dotted box on the left is a schematic diagram of the basic door switch contact group control mechanism and its action stroke inside the door lock body 1, which includes a mechanical push rod 111 and a door switch contact group 112. At this time, the mechanical push rod 111 presses the elastic contact 1121 to make the door switch contact group 112 in the door open detection state, that is, outputs the corresponding contact switch signal, and the vertical positions of the mechanical push rod 111 and the elastic contact 1121 are both in the lower limit or the lowest position; if the mechanical push rod 111 moves up to the upper limit position by mechanical action, the elastic contact 1121 is completely released to return (reset), and the door switch contact group 112 is in the door closed detection state. On the right side is the electromagnet push rod 110 designed and installed in a suitable position. The mechanical action can be completed by lateral extension of the elastic contact 1121. The travel limit is δ. Referring to the design of the door switch contact group control mechanism, when the electromagnet of the electromagnet push rod 110 is energized, the electromagnet push rod 110 can independently press the elastic contact 1121 to make the door switch contact group 112 be in and maintain the door open detection state; when the electromagnet of the electromagnet push rod 110 is de-energized, the electromagnet push rod 110 relies on its own elastic force to reset, and the elastic contact 1121 is still controlled solely by the mechanical push rod 111 of the door lock body.

[0072] See attached Fig.10 The safety door lock system operates according to this process, detects the combination of switch signals flowing to the electrical control side, and according to different functional applications and different detection states, it is fed back to the safety electrical hard-wired circuit or control system side of the production line equipment as needed after being processed by the control loop, and performs certain response control or restrictions on the operation and use of the production line equipment and other functions.

[0073] The present invention provides a smart factory-specific safety door lock system and method with detection feedback control function, which can provide external indication, conditional output function, etc. through the classification design of detection control function, selection application, specific design and detection judgment of the real physical position of the bolt, and provide external indication, conditional output function, etc. through corresponding feedback control, and can also directly output response in combination with the control system of production line equipment to form a closed loop. The safety door lock system is composed of a door lock body, a special-shaped bolt, and a proximity switch group. The door lock body is provided with a key conversion switch, two aviation connection sockets, and a bolt position detection indicator light. The proximity switch group control relay, the normal detection relay of the bolt position, the bolt dislocation detection relay, the control intermediate relay, and the electromagnet push rod mechanism are arranged inside, and the corresponding electrical control circuit is designed and configured for related feedback control functions; the special-shaped bolt is provided with two bosses of different positions, different directions, and different heights on the bolt body, which are used to cooperate with the proximity switch group to detect the bolt position; the proximity switch group includes two proximity switches of the same model, which are used to detect the position status of the bolt in different directions, and its cable plugs are respectively connected to each aviation connection socket of the door lock body. The door lock body and the special-shaped bolt are adaptively mounted and fixed to the protective door (barrier) at appropriate positions according to the opening form (flat opening or push-pull type) of the protective door (barrier) of the production line equipment. The two proximity switches of the proximity switch group are installed and fixed on the protective door side where the special-shaped bolt is located, and the detection of the real physical position of the bolt is realized through reasonable arrangement. The design of this application is reasonable and compact in structure. The bolt detection control function on the door lock body side is enabled and switched through the key conversion switch. When the proximity switch group detects that the bolt position is abnormal, the primary bolt detection control function of the I gear provides a light indication of the abnormal bolt position and the contact conditions or control of the normal detection relay output, and can be connected in series or combined with the door interlocking function of the safety door lock system. It can also be directly used in the safety electrical hard control circuit of the production line equipment; the secondary bolt detection control function of the II gear has not only the I gear function, but also can directly output the response of the door lock body and directly limit the operation and use of the production line equipment through corresponding control when the bolt is seriously dislocated.

[0074] This safety door lock system is designed with two latch detection control function modes. It directly reflects whether the door lock is in a truly lockable state by detecting whether the actual physical position of the latch is correct. It can output prompts, feedback and control according to the abnormal state of the latch and act on the door machine interlock, ensuring the authenticity of the door lock locking conditions, thereby enhancing the reliability of the door machine interlock application and the safe use of production line equipment, ensuring the safe operation of the smart factory when unattended.

Claims

1. A smart factory dedicated security door lock system, characterized in that: The system comprises: a door lock body (1), a special-shaped latch (2), and a proximity switch group (3); The door lock body (1) is fixedly installed at a preset position on the left production line equipment protection door (6); the angle steel seat (4) is welded to a preset position on the right production line equipment protection door (5) and is used to install the special-shaped latch (2) and the proximity switch group (3).

2. A smart factory dedicated security door lock system according to claim 1, characterized in that: The door lock body (1) is provided with a latch position detection indicator light (11), an air connection socket (12), a key conversion switch (13) and a lock head (14); the latch position detection indicator light (11) transmits the light display state to the visible outer surface of the door lock body (1) through a light-guiding plastic rod; the air connection socket (12) is provided on the bottom surface of the door lock body (1); the key conversion switch (13) is a three-gear design, which enables and switches the latch detection control function; the lock head (14) and the special-shaped latch (2) complete the mechanical latching; The key changeover switch is used to enable and switch the latch detection control function on the door lock body side; the aviation connection socket is used to plug the proximity switch and realize the latch position detection signal input; the latch position detection indicator light directly feedbacks whether the latch position status is normal or not.

3. A smart factory dedicated security door lock system according to claim 2, characterized in that: The special-shaped latch pin (2) is provided with a vertical boss (21) and a horizontal boss (22). The special-shaped latch pin (2) is installed and fastened to the angle steel seat (4) using a threaded fastener. The position of the special-shaped latch pin (2) corresponds to the lock head (14). A vertical ear piece (41) and a horizontal ear piece (42) are respectively arranged on the angle steel seat (4) corresponding to the vertical boss (21) and the horizontal boss (22); the vertical proximity switch (31) is installed on the vertical ear piece (41) to detect the vertical boss (21), and the horizontal proximity switch (32) is installed on the horizontal ear piece (42) to detect the horizontal boss (22).

4. A smart factory dedicated security door lock system according to claim 2, characterized in that: The door lock body (1) is internally provided with a proximity switch group control relay, a latch position normal detection relay, a latch dislocation detection relay, a control intermediate relay and an electromagnetic push rod mechanism; The proximity switch group control relay is used for the control output of the proximity switch group detection signal, and includes a group of normally open and normally closed contacts; the normal detection relay for the latch position is used for the feedback output of the latch position detection by the safety door lock system under normal conditions according to the contact switch signal output by the proximity switch group control relay, and also includes a group of normally open and normally closed contacts; the latch dislocation detection relay is used to detect whether the latch is dislocated according to the contact switch signal output by the proximity switch group control relay; the electromagnet push rod mechanism controls the push rod to move downward and limit the position through the electromagnet push rod control circuit, and can independently maintain the contact position of the door switch contact group of the door lock body.

5. A detection feedback control method for a smart factory dedicated safety door lock system, characterized in that: Applied to the system as described in any one of claims 1 to 4, the electrical control circuit provided inside the door lock body comprises a proximity switch group control circuit, a latch position normal detection control circuit, a latch dislocation detection control circuit and an electromagnet push rod control circuit; The method comprises: The latch detection control function on the door lock body side is enabled and switched through the key switching switch. When the proximity switch group detects that the latch position is abnormal, the primary latch detection control function of gear I provides a lamp indication of abnormal latch position and contact conditions for the normal detection relay output through the latch position normal detection control circuit; the secondary latch detection control function of gear II has the function of gear I through the latch position normal detection control circuit, the latch dislocation detection control circuit and the electromagnet push rod control circuit. In addition to having the function of gear I, it can also make the door lock body directly output a response and directly limit the operation and use of the production line equipment through corresponding control when the latch is seriously dislocated.

6. The detection feedback control method of a smart factory dedicated safety door lock system according to claim 5 is characterized in that: In the control circuit of the proximity switch group: Each proximity switch of the proximity switch group is an inductive three-wire PNP normally open type. Each control relay of the proximity switch group is electrically controlled and wired accordingly. The vertical proximity switch (31) detects that the vertical position of the special-shaped plug (2) is correct, controls the coil of the vertical proximity switch control relay (15) to be energized, and the KA1 normally open contact (151) is closed. Otherwise, it remains disconnected. The horizontal proximity switch (32) detects that the horizontal position of the special-shaped plug (2) is correct, controls the coil of the horizontal proximity switch control relay (16) to be energized, and the KA2 normally open contact (161) is closed. Otherwise, it remains disconnected.

7. The detection feedback control method of a smart factory dedicated safety door lock system according to claim 6 is characterized in that: In the normal detection control loop of the latch position: Two contacts at the fully open positions of the I and II gears in the key switch (13) are connected in series with the KA1 normally open contact (151), the KA2 normally open contact (161) and the control coil of the latch position normal detection relay (17), and the control coil of the latch position normal detection relay (17) is connected in parallel with the latch position detection indicator light (11); The control process of the latch position normal detection control circuit is as follows: the key switch (13) wiring contact group is in the full-open position of the I gear and the II gear. Only when the KA1 normally open contact (151) and the KA2 normally open contact (161) are both closed, the latch position detection indicator light (11) is controlled to light up and the latch position normal detection relay (17) coil is energized. Otherwise, the controlled indicator light (11) is extinguished and the controlled coil is de-energized. The latch position normal detection relay (17) coil is energized, and the KA normally closed contact (172) is opened. When the KA normally closed contact (172) is de-energized, the KA normally closed contact (172) is closed.

8. The detection feedback control method of a smart factory dedicated safety door lock system according to claim 7, characterized in that: In the latch dislocation detection control circuit: The two contacts of the key switch (13) in the II gear only on position are connected in series with the KA1 normally open contact (151) and the control coil of the latch dislocation detection relay (18), and the KA2 normally open contact (161) is connected in parallel with the KA1 normally open contact (151); The control process of the latch dislocation detection control circuit is as follows: when the key switch (13) wiring contact group is in the II gear on position and at least one of the KA1 normally open contact (151) and the KA2 normally open contact (161) is closed, the control latch dislocation detection relay (18) coil is energized; only when the KA1 normally open contact (151) and the KA2 normally open contact (161) are both kept open, the latch dislocation detection relay (18) coil is not energized; when the latch dislocation detection relay (18) coil is energized, the KA3 normally closed contact (182) is opened; when the KA3 normally closed contact (182) is closed when the power is lost.

9. The detection feedback control method of a smart factory dedicated safety door lock system according to claim 8, characterized in that: The door lock body (1) includes a mechanical push rod (111) and a door switch contact group (112). An electromagnet push rod (110) is installed on the right side of the mechanical push rod (111), and the mechanical action is completed by cooperating with a spring contact (1121) on the transversely extended door switch contact group (112); When the electromagnet of the electromagnet push rod (110) is energized, the electromagnet push rod (110) can independently press the elastic contact (1121) to make the door switch contact group (112) in and maintain the door opening detection state; when the electromagnet of the electromagnet push rod (110) is de-energized, the electromagnet push rod (110) is reset by its own elastic force, and the elastic contact (1121) is still controlled solely by the mechanical push rod (111) of the door lock body.

10. The detection feedback control method of a smart factory dedicated safety door lock system according to claim 9, characterized in that: In the solenoid actuator control circuit: The two contacts of the key switch (13) in the position of only the II gear being turned on are connected in series with the KA3 normally closed contact (182), the control coil of the intermediate relay (19) and the electromagnet control coil of the electromagnet push rod (110); the KA normally closed contact (172) is connected in series with the KA4 normally open contact (191) and is connected in parallel with both ends of the KA3 normally closed contact (182); The control process of the electromagnetic push rod control circuit is as follows: the key switch (13) wiring contact group is in the II gear on position, and it can only be turned on when it is in the II gear; when the KA3 normally closed contact (182) remains closed, the control electromagnetic push rod (110) electromagnet is energized, and at the same time the intermediate relay (19) is energized and controls the KA4 normally open contact (191) to close; at this time, the KA normally closed contact (172) is connected in series with it to realize the self-locking holding of the circuit, and only when the KA normally closed contact (172) is disconnected, the control electromagnetic push rod (19) electromagnet is not energized.

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