A dual-confirmation switchable door interlock system and control method

Abstract

The application provides a double-confirmation switchable door interlocking system and a control method, which comprises a switching control switch, a switch KS, each travel switch, a double-position switch and each reset switch, wherein each two reset switches form a group; the system further comprises a plurality of relays and each work station equipment. In the system, each area can independently perform a test under normal circumstances through the switching control switch, so as to improve work efficiency; when joint testing is performed, all work station equipment units are controlled through the travel switch SQ1 of the work station 1, so as to meet the joint testing requirement. In addition, the design based on the double-position switch can effectively prevent misoperation; when the double-position switch is pressed, the corresponding equipment will stop running due to power loss, so that the safety of system operation is improved. In combination with the design of the reset switch, the safety of the system is further improved, malicious or unauthorized operation is prevented, the operation process is standardized, and work efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of automation control technology, and in particular to a dual-confirmation switchable door interlocking system and control method. Background Technology

[0002] In production and testing processes involving high voltage, high current, or mechanical motion, door interlocking systems play a crucial role in preventing personnel from accidentally entering hazardous areas. When a door is opened, the limit switch or photoelectric switch on the door immediately switches from a conducting state to an open state, thereby instantly de-energizing and stopping the equipment controlled by the door interlock, ensuring safety.

[0003] Traditional door interlocking technology relies on limit switches triggered after the door closes, allowing operation after the equipment is powered on. However, existing technology has limitations. For example, each door is only equipped with a short-circuit switch. In situations requiring combined pressurization or where the test sample occupies a large space, this simple short-circuit disables the door interlock's safety function, allowing the equipment to continue operating and posing a significant safety hazard. Furthermore, traditional door interlocking technology lacks switching functionality, failing to ensure all equipment is always under control. More seriously, existing door interlocking systems rely solely on door closure to determine operational safety; even a single test engineer can still perform pressurization operations, failing to meet the safety requirements of operating procedures.

[0004] Therefore, improving the security of door interlocking systems is an urgent problem to be solved. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a switchable door interlocking system and control method with dual confirmation to solve the problem of low security in door interlocking systems.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] The first aspect of this invention discloses a dual-confirmation switchable door interlocking system, the system comprising:

[0008] One end of the switching control switch is connected to several workstation equipment units respectively;

[0009] One end of the switching control switch is connected to switch KS; the common terminal of switch KS and limit switch SQ1 is connected to the live wire; the other end of limit switch SQ1 is connected in series with reset switches SR1-1 and SR1-2; switch KA1 is connected in parallel with reset switches SR1-1 and SR1-2; one end of the parallel connection is connected to the other end of the switching control switch, and the common terminal of the connection is connected to the neutral wire through relay KA1;

[0010] The switch KA1 is connected to the push button switch SB1-1 and the workstation 1 device respectively;

[0011] In any of the workstation equipment units, the dual-position switch S1 and the limit switch SQ2 are connected in parallel. The first common terminal of the parallel connection is connected to one end of the switching control switch, and the second common terminal of the parallel connection is connected in series with the reset switch SR2-1 and the reset switch SR2-2.

[0012] Switch KA2 is connected in parallel with reset switches SR2-1 and SR2-2; one end of the parallel connection is connected to the neutral wire through relay KA2.

[0013] The switch KA2 is connected to the push button switch SB2-1 and the corresponding workstation 2 equipment respectively;

[0014] The dual-position switches in several of the aforementioned workstation equipment units are connected in series and then connected to relay KS;

[0015] When the equipment at workstation 1 is subjected to a pressure test, the limit switch SQ1 is closed; the reset switches SR1-1 and SR1-2 are closed simultaneously, and the relay KA1 is energized; the switch KA1 is closed and remains self-locking, and the push button switch SB1-1 is turned on, so that the equipment at workstation 1 can be subjected to a pressure test.

[0016] When station 2 and station 1 in any of the aforementioned workstation equipment units undergo a joint pressure test, the switching control switch and relay KA1 are activated; the limit switch SQ1 is deactivated; reset switches SR1-1 and SR1-2 are simultaneously closed, energizing relay KA1; switch KA1 is closed and remains self-locking, button switch SB1-1 is activated, and limit switch SQ2 is deactivated; reset switches SR2-1 and SR2-2 are simultaneously closed, energizing relay KA2; switch KA2 is closed and remains self-locking, button switch SB2-1 is activated, enabling station 1 and station 2 to undergo a joint pressure test.

[0017] Preferably, when the workstation equipment unit includes two limit switches, the dual-position switch S2 and the limit switch SQ3-1 are connected in parallel, the dual-position switch S3 and the limit switch SQ3-2 are connected in parallel, and the limit switch SQ3-1 and the limit switch SQ3-2 are connected in series.

[0018] The limit switch SQ3-2 is connected in series with reset switches SR3-1 and SR3-2; the switch KA3 is connected in parallel with reset switches SR3-1 and SR3-2; one end of the parallel connection is connected to the neutral wire through relay KA3.

[0019] The switch KA3 is connected to the push button switch SB3-1 and the corresponding device.

[0020] Preferably, all reset switches are fingerprint recognition switches.

[0021] Preferably, the switching control switch is a changeover switch SPDT or a normally closed switch;

[0022] When the switching control switch is a SPDT changeover switch, one end of the moving contact of the SPDT changeover switch is connected to several workstation equipment units respectively;

[0023] The stationary contact 1 of the changeover switch SPDT is connected to the switch KS; the common terminal of the switch KS and the limit switch SQ1 is connected to the live wire; the other end of the limit switch SQ1 is connected in series with the reset switches SR1-1 and SR1-2; the switch KA1 is connected in parallel with the reset switches SR1-1 and SR1-2; one end of the parallel connection is connected to the stationary contact 2 of the changeover switch SPDT, and the common terminal of the connection is connected to the neutral wire through the relay KA1;

[0024] When the switching control switch is a normally closed switch KS, one end of the normally closed switch KS is connected to several workstation equipment units respectively;

[0025] One end of the normally closed switch KS is also connected to switch KS; the common terminal of the switch KS and limit switch SQ1 is connected to the live wire; the other end of the limit switch SQ1 is connected in series with reset switches SR1-1 and SR1-2; switch KA1 is connected in parallel with reset switches SR1-1 and SR1-2; one end of the parallel connection is connected to the other end of the normally closed switch, and the common terminal of the connection is connected to the neutral wire through relay KA1.

[0026] Preferably, the setting distance between the reset switch SR1-1 and the reset switch SR1-2 is greater than a threshold.

[0027] The distance between the reset switch SR2-1 and the reset switch SR2-2 is greater than a threshold.

[0028] Preferably, the system further includes: a first warning light, a second warning light, a third warning light, and a buzzer;

[0029] The normally closed contact of relay KA1 is connected to the first warning light; the common terminal of the normally open contact of relay KS is connected in series with the common terminal of the normally open contact of relay KA1 and the second warning light.

[0030] The common terminal of the normally closed contact of relay KS and the normally open contact of relay KA1, and the third warning light are connected in series.

[0031] The buzzer is connected to the common terminal of the normally open contact of the relay KA1;

[0032] Each of the aforementioned workstation equipment units is equipped with a corresponding first warning light, a second warning light, and a third warning light, as well as a buzzer.

[0033] The second aspect of this invention discloses a control method for a dual-confirmation switchable door interlocking system, applied to the system disclosed in the first aspect of this invention, the method comprising:

[0034] Determine the test mode based on the test project information;

[0035] When the test mode is independent test mode, the connection between the switching control switch and switch KS is turned on, and switch KS is closed.

[0036] When it is determined from the test item information that the equipment at workstation 1 needs to undergo a pressure test, close the limit switch SQ1;

[0037] Reset switches SR1-1 and SR1-2 are closed simultaneously, energizing relay KA1; switch KA1 is closed and remains self-locking, connecting push button switch SB1-1 to perform a pressure test on the equipment at workstation 1;

[0038] When the test mode is the combined test mode, connect the switching control switch and relay KA1;

[0039] When it is determined, based on the test item information, that equipment at station 2 and equipment at station 1 in any workstation equipment unit need to undergo a joint pressure test, close the limit switch SQ1; control the reset switches SR1-1 and SR1-2 to close simultaneously, energizing the relay KA1; control the switch KA1 to close and maintain self-locking, and turn on the push button switch SB1-1.

[0040] Close the limit switch SQ2 in the workstation equipment unit; control the reset switches SR2-1 and SR2-2 to close simultaneously, energizing the relay KA2; control the switch KA2 to close and maintain self-locking, and connect the push button switch SB2-1 to perform a joint pressure test on the equipment at workstation 1 and the equipment at workstation 2.

[0041] Preferably, when the test mode is the independent test mode, the connection between the switching control switch and switch KS is turned on. After switch KS is closed, the following steps are also included:

[0042] When it is determined from the test item information that the equipment at station 2 in any workstation unit needs to undergo a pressure test, the limit switch SQ2 in the workstation equipment unit is closed; at the same time, the reset switches SR2-1 and SR2-2 are closed to energize the relay KA2; the control switch KA2 is closed and remains self-locking, and the push button switch SB2-1 is turned on to enable the equipment at station 2 to undergo a pressure test.

[0043] Preferably, when the test mode is the independent test mode, the connection between the switching control switch and switch KS is turned on. After switch KS is closed, the following steps are also included:

[0044] When the dual-position switch S1 in any of the aforementioned workstation equipment units is pressed, the equipment in the current workstation equipment unit cannot operate.

[0045] Preferably, when the test mode is the combined test mode, after connecting the switching control switch and relay KA1, the following is also included:

[0046] If limit switch SQ1 is disconnected, relay KA1 will be de-energized, and all equipment will lose power and stop operating.

[0047] Based on the above embodiments of the present invention, a dual-confirmation and switchable door interlocking system and control method are provided. The system includes: a switching control switch, a switch KS, various limit switches, dual-position switches, and various reset switches, wherein every two reset switches form a group; the system also includes multiple relays and various workstation devices. In this system, the switching control switch enables each area to be tested independently under normal conditions, thereby improving work efficiency; during joint testing, the limit switch SQ1 at workstation 1 controls all workstation device units to meet the requirements of joint testing. Furthermore, the dual-position switch design effectively prevents misoperation; when a dual-position switch is pressed, the corresponding device will lose power and stop operating, thereby improving the safety of system operation. Combined with the reset switch design, the present invention further enhances system security, prevents malicious or unauthorized operation, and standardizes the operating procedure, further improving work efficiency. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0049] Figure 1 A first schematic diagram of a switchable door interlocking system with dual confirmation provided in an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of the test station and door interlock arrangement provided in an embodiment of the present invention;

[0051] Figure 3 A second schematic diagram of a switchable door interlocking system with dual confirmation provided in an embodiment of the present invention;

[0052] Figure 4A third schematic diagram of a switchable door interlocking system with dual confirmation provided in an embodiment of the present invention;

[0053] Figure 5 A fourth schematic diagram of a switchable door interlocking system with dual confirmation provided in an embodiment of the present invention;

[0054] Figure 6 A flowchart illustrating a control method for a dual-confirmation switchable door interlocking system provided in an embodiment of the present invention. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] As can be seen from the background technology, traditional door interlocking technology has limitations, such as the short-circuit switch losing its safety function, lack of switching function, and reliance on door closure to determine operational safety, which makes it impossible to effectively ensure the safety of the equipment during operation.

[0058] Therefore, this invention provides a dual-confirmation and switchable door interlocking system and control method. The system includes: a switching control switch, a switch KS, various limit switches, dual-position switches, and various reset switches, wherein every two reset switches form a group. The system also includes multiple relays and various workstation devices. In this system, the switching control switch enables each area to be tested independently under normal conditions, thereby improving work efficiency. During joint testing, the limit switch SQ1 at workstation 1 controls all workstation device units to meet the requirements of joint testing. Furthermore, the dual-position switch design effectively prevents misoperation. When a dual-position switch is pressed, the corresponding device will lose power and stop operating, thereby improving the safety of system operation. Combined with the reset switch design, this invention further enhances system security, prevents malicious or unauthorized operations, and standardizes the operating procedures, further improving work efficiency.

[0059] See Figure 1 This diagram illustrates a first schematic of a switchable door interlocking system with dual authentication provided by an embodiment of the present invention. The system includes the following:

[0060] Specifically, one end of the switching control switch is connected to several workstation equipment units.

[0061] like Figure 1 As shown, one end of the switching control switch is connected to switch KS (that is, the switching control switch is connected to switch KS through connection position 1).

[0062] Specifically, the common terminal of switch KS and limit switch SQ1 is connected to the live wire L.

[0063] like Figure 1 As shown, the other end of the limit switch SQ1 is connected in series with the reset switches SR1-1 and SR1-2; the switch KA1 is connected in parallel with the reset switches SR1-1 and SR1-2; one end of the parallel connection is connected to the other end of the switching control switch (that is, the switching control switch is connected to the parallel end through connection position 2), and the common terminal of the connection is connected to the neutral line N through the relay KA1.

[0064] Specifically, switch KA1 is connected to push button switch SB1-1 and station 1 equipment respectively.

[0065] In practical applications, the push-button switch SB1-1 can be a key push-button switch or a switch with identification function, which can effectively prevent unauthorized operation and improve the overall protection performance of the system.

[0066] Understandably, a two-position switch has four terminals, arranged in groups of two. For example... Figure 1 As shown, the terminals on the L-X1 side are connected in series as a circuit to prevent misoperation; the two terminals on the side closest to the limit switch SQ2 are a group and connected in parallel to the two ends of the corresponding limit switch SQ2.

[0067] like Figure 1 As shown, in any workstation equipment unit, the dual-position switch S1 and the limit switch SQ2 are connected in parallel. The first common terminal of the parallel connection is connected to one end of the switching control switch, and the second common terminal of the parallel connection is connected in series with the reset switch SR2-1 and the reset switch SR2-2.

[0068] Switch KA2 is connected in parallel with reset switches SR2-1 and SR2-2; one end of the parallel connection is connected to the neutral wire through relay KA2.

[0069] Specifically, switch KA2 is connected to push button switch SB2-1 and the corresponding workstation 2 equipment.

[0070] In a specific embodiment, the dual-position switches in several workstation equipment units are connected in series and then connected to the relay KS (see below for details). Figure 3 The diagram shows "two-position switches S1, S2, and S3 connected in series and then connected to relay KS".

[0071] It should be noted that when the equipment at workstation 1 is subjected to a pressure test, the switching control switch is set to position 1; the limit switch SQ1 is closed; the reset switches SR1-1 and SR1-2 are closed simultaneously, and the relay KA1 is energized; the switch KA1 is closed and remains self-locking, and the push button switch SB1-1 is turned on, so that the equipment at workstation 1 can be subjected to a pressure test.

[0072] Understandably, when station 2 and station 1 in any workstation unit undergo a joint pressure test, the switching control switch (currently in position 2) and relay KA1 are activated; limit switch SQ1 is deactivated; reset switches SR1-1 and SR1-2 are simultaneously closed, energizing relay KA1; switch KA1 closes and remains self-locking, activating push-button switch SB1-1. Limit switch SQ2 is deactivated; reset switches SR2-1 and SR2-2 are simultaneously closed, energizing relay KA2; switch KA2 closes and remains self-locking, activating push-button switch SB2-1, thus enabling station 1 and station 2 to undergo a joint pressure test.

[0073] To better illustrate the dual-confirmation switchable door interlocking system provided in the embodiments of the present invention, the following description is provided in conjunction with... Figure 2 The schematic diagram of the test station and door interlock arrangement shown further illustrates a dual-confirmation switchable door interlock system provided in this embodiment of the invention.

[0074] like Figure 2 As shown, in practical applications, the test hall is divided into multiple test stations, such as station 1, station 2, and station 3, according to different test items and test equipment. Under normal circumstances, each test station conducts tests independently. However, in joint tests, multiple stations often need to conduct tests simultaneously. For example, the equipment in station 1, station 2, and station 3 can be used to jointly pressure test the test specimen. Therefore, the dual-confirmation switchable door interlocking system provided in this embodiment of the invention is used to achieve the purpose of allowing each test station to conduct tests independently or jointly.

[0075] correspond Figure 2 In the various experimental stations shown, under normal circumstances, the limit switch SQ1 (such as...) Figure 2 The door SQ1 shown is used to control equipment 1-1 to equipment 1-n in station 1, and the limit switch SQ2 (as shown) Figure 2The door SQ2 shown is used to control equipment 2-1 and equipment 2-2 in workstation 2. Limit switches SQ3-1 and SQ3-2 (as shown) Figure 2 Doors SQ3-1 and SQ3-2 shown in the diagram are used to control devices 3-1 and 3-2 in workstation 3.

[0076] See Figure 3 As shown, when the workstation equipment unit includes two (or more) limit switches, the double-position switch S2 and the limit switch SQ3-1 are connected in parallel, the double-position switch S3 and the limit switch SQ3-2 are connected in parallel, and the limit switch SQ3-1 and the limit switch SQ3-2 are connected in series.

[0077] Specifically, limit switch SQ3-2 is connected in series with reset switches SR3-1 and SR3-2; switch KA3 is connected in parallel with reset switches SR3-1 and SR3-2; the parallel connection is connected to the neutral wire through relay KA3.

[0078] It should be noted that switch KA3 is connected to push-button switch SB3-1 and the corresponding equipment, such as... Figure 3 The equipment at workstation 3 shown has two-position switches S1, S2, and S3 connected in series, which are then connected to relay KS.

[0079] Understandably, all reset switches are fingerprint recognition switches equipped with a logging function to record the identification of the test personnel who triggered the current reset switch and the trigger date. This design, combining fingerprint recognition and logging, not only enhances security but also strengthens the transparency and traceability of the operation process, providing robust protection for equipment control and management in high-security environments.

[0080] In some specific embodiments, Figure 3 The distance between reset switches SR1-1 and SR1-2 is greater than a threshold; the distance between reset switches SR2-1 and SR2-2 is greater than a threshold; similarly, the distance between reset switches SR3-1 and SR3-2 is greater than a threshold. The threshold can be 2 meters. This is because a distance of more than 2 meters between the two reset switches SR at each workstation effectively increases operational independence, prevents the same tester from simultaneously triggering two reset switches SR, achieves double confirmation, and reduces the risk of misoperation. This design enhances system safety, prevents malicious or unauthorized operation, standardizes operating procedures, and improves work efficiency. Furthermore, the physical separation prevents accidental touches and unintended triggering, provides more space for testers, meets safety standards, and ensures better protection of equipment in high-safety environments.

[0081] In practical applications Figure 1 The switching control switch shown is specifically a changeover switch SPDT (single-pole double-throw switch) or a normally closed switch.

[0082] In some embodiments, the SPDT changeover switch and all dual-position switches require a key to operate, and the key is kept by a designated person.

[0083] like Figure 3 As shown, when the switching control switch is the SPDT changeover switch, one end of the moving contact of the SPDT changeover switch is connected to several workstation equipment units respectively.

[0084] Specifically, the stationary contact 1 of the changeover switch SPDT is connected to the switch KS; the common terminal of the switch KS and the limit switch SQ1 is connected to the live wire; the other end of the limit switch SQ1 is connected in series with the reset switches SR1-1 and SR1-2; the switch KA1 is connected in parallel with the reset switches SR1-1 and SR1-2; one end of the parallel connection is connected to the stationary contact 2 of the changeover switch SPDT, and the common terminal of the connection is connected to the neutral wire through the relay KA1.

[0085] Switch KA1 is connected to push button switch SB1-1 and workstation 1 equipment respectively.

[0086] In any workstation equipment unit, the dual-position switch S1 and the limit switch SQ2 are connected in parallel. The first common terminal of the parallel connection is connected to one end of the moving contact of the changeover switch SPDT, and the second common terminal of the parallel connection is connected in series with the reset switch SR2-1 and the reset switch SR2-2.

[0087] Switch KA2 is connected in parallel with reset switches SR2-1 and SR2-2; one end of the parallel connection is connected to the neutral wire through relay KA2.

[0088] Switch KA2 is connected to push button switch SB2-1 and the corresponding workstation 2 equipment.

[0089] The dual-position switches in several workstation equipment units are connected in series and then connected to the relay KS.

[0090] like Figure 4 As shown, when the switching control switch is a normally closed switch KS, one end of the normally closed switch KS is connected to several workstation equipment units.

[0091] Specifically, one end of the normally closed switch KS is also connected to switch KS; the common terminal of switch KS and limit switch SQ1 is connected to the live wire; the other end of limit switch SQ1 is connected in series with reset switch SR1-1 and reset switch SR1-2; switch KA1 is connected in parallel with reset switch SR1-1 and reset switch SR1-2; one end of the parallel connection is connected to the other end of the normally closed switch, and the common terminal of the connection is connected to the neutral wire through relay KA1.

[0092] Switch KA1 is connected to push button switch SB1-1 and workstation 1 equipment respectively.

[0093] In any workstation equipment unit, the dual-position switch S1 and the limit switch SQ2 are connected in parallel. The first common terminal of the parallel connection is connected to one end of the normally closed switch KS, and the second common terminal of the parallel connection is connected in series with the reset switch SR2-1 and the reset switch SR2-2.

[0094] Switch KA2 is connected in parallel with reset switches SR2-1 and SR2-2; one end of the parallel connection is connected to the neutral wire through relay KA2.

[0095] Switch KA2 is connected to push button switch SB2-1 and the corresponding workstation 2 equipment.

[0096] The dual-position switches in several workstation equipment units are connected in series and then connected to the relay KS.

[0097] See Figure 5 The system also includes: a first warning light, a second warning light, a third warning light, and a buzzer.

[0098] Specifically, the normally closed contact of relay KA1 is connected to the first warning light (e.g., Figure 5 The green warning light shown); the common terminal of the normally open contact of relay KS and the common terminal of the normally open contact of relay KA1, and the second warning light (e.g., the green warning light); Figure 5 (The red warning light shown is connected in series.)

[0099] Specifically, the common terminal of the normally closed contact of relay KS and the normally open contact of relay KA1, and the third warning light (e.g.) Figure 5 (The yellow warning light shown is connected in series.)

[0100] It should be noted that the buzzer is connected to the common terminal of the normally open contact of relay KA1.

[0101] Understandably, each workstation equipment unit is equipped with a corresponding first warning light, second warning light, and third warning light, as well as a buzzer.

[0102] For example, in combination Figure 5 As shown, the normally closed contact of relay KA2 is connected to the first warning light (e.g., Figure 5 The green warning light shown); the common terminal of the normally open contact of relay KS and the common terminal of the normally open contact of relay KA2, and the second warning light (e.g., the green warning light); Figure 5 (The red warning light shown is connected in series.)

[0103] Specifically, the common terminal of the normally closed contact of relay KS and the normally open contact of relay KA1, the common terminal of the normally open contact of relay KA2, and the third warning light (e.g.) Figure 5(The yellow warning light shown is connected in series.)

[0104] It should be noted that the buzzer is connected to the common terminal of the normally open contact of relay KA2.

[0105] For example, in combination Figure 5 As shown, the normally closed contact of relay KA3 is connected to the first warning light (e.g., Figure 5 The green warning light shown); the common terminal of the normally open contact of relay KS and the common terminal of the normally open contact of relay KA3, and the second warning light (e.g., the green warning light); Figure 5 (The red warning light shown is connected in series.)

[0106] Specifically, the common terminal of the normally closed contact of relay KS and the normally open contact of relay KA1, the common terminal of the normally open contact of relay KA3, and the third warning light (e.g.) Figure 5 (The yellow warning light shown is connected in series.)

[0107] It should be noted that the buzzer is connected to the common terminal of the normally open contact of relay KA3.

[0108] In practical applications, taking workstation 2 as an example, when workstation 2 is not being tested, the KA2 coil is not energized, and the green warning light circuit is energized because it is connected to the normally closed contact of KA2, so the green warning light is constantly on, indicating safety. When workstation 2 is being tested alone, the KS coil is energized, the KA2 coil is energized, the normally open contacts of KS and KA2 are closed, the red warning light is on, indicating danger, and indicating that the equipment in workstation 2 is being tested independently; at this time, the normally closed contact of KA2 opens, and the green warning light goes out.

[0109] When the combined voltage test is performed at station 2, the KS coil is not energized, the KA2 and KA1 coils are attracted, the normally closed contact of KS closes, the normally open contact of KA2 and KA1 closes, and the yellow warning light illuminates, indicating danger and indicating that a combined pressure test is in progress.

[0110] It should be noted that, under all circumstances, the buzzer is controlled by the normally open contact of the relay at its respective workstation, and will sound an alarm when a test is conducted.

[0111] Understandably, the control logic for the warning lights and buzzers at other workstations is the same as that at workstation 2, and will not be repeated here.

[0112] In this embodiment of the invention, each area can be tested independently under normal conditions by switching control switches, thereby improving work efficiency. During joint testing, all workstation equipment units are controlled by the limit switch SQ1 at workstation 1 to meet the requirements of joint testing. Furthermore, the design based on a dual-position switch effectively prevents misoperation; when a dual-position switch is pressed, the corresponding equipment will lose power and stop operating, thus improving the safety of system operation. Combined with the design requiring double confirmation from the reset switch, this invention further enhances system security, prevents malicious or unauthorized operations, and standardizes the operating procedures, further improving work efficiency. In addition, the inclusion of warning lights and a buzzer mechanism allows for a more intuitive understanding of the equipment's testing status, improving the system's real-time performance, reliability, and safety.

[0113] See Figure 6 The diagram illustrates a flowchart of a control method for a dual-confirmation switchable door interlocking system provided in an embodiment of the present invention. This control method is applied to the dual-confirmation switchable door interlocking system provided in the above-described embodiment of the present invention.

[0114] To minimize the workload of laying control lines and facilitate future upgrades, this method can be implemented using wireless sensor switches and a central processing unit. The method includes:

[0115] Step S601: Determine the test mode based on the test item information.

[0116] It should be noted that the testing modes include independent testing mode and joint testing mode. In independent testing mode, the equipment at each workstation is tested independently; in joint testing mode, the equipment at multiple workstations is tested together.

[0117] It is understandable that when the test mode is determined to be an independent test mode based on the test item information, step S602 is executed; when the test mode is determined to be a joint test mode based on the test item information, step S605 is executed.

[0118] Step S602: When the test mode is independent test mode, connect the switching control switch and switch KS, and switch KS will be closed.

[0119] by Figure 3 For example, when the test mode is independent test mode, the moving contact of the changeover switch SPDT is connected to the stationary contact 1, which is connected to switch KS, and switch KS is closed. At this time, double-position switches S1, S2, and S3 are short-circuited (released) switches for limit switches SQ2, SQ3-1, and SQ3-2, and none of the double-position switches S1, S2, and S3 are pressed, and relay KS is energized; at this time... Figure 2Each workstation's limit switch independently controls the equipment corresponding to that workstation. The equipment in workstations 2 and 3 is not controlled by the limit switch SQ3 in workstation 1.

[0120] Step S603: When it is determined from the test item information that the equipment at station 1 needs to undergo a pressure test, close the limit switch SQ1.

[0121] It is understandable that closing the limit switch SQ1 means closing... Figure 2 The gate SQ1 is shown in the diagram.

[0122] Step S604: Reset switches SR1-1 and SR1-2 are closed, energizing relay KA1; switch KA1 is closed and remains self-locking, turning on push button switch SB1-1 to perform a pressure test on the equipment at workstation 1.

[0123] In some particular embodiments, when Figure 2 When the door SQ1 shown is opened, Figure 1 When the limit switch SQ1 is opened, the relay KA1 is de-energized, the switch KA1 is opened, and the equipment at workstation 1 loses power and stops operating.

[0124] Understandably, when it is determined from the test item information that the equipment at station 2 needs to undergo a pressure test, the limit switch SQ2 is closed. Reset switches SR2-1 and SR2-2 close simultaneously, energizing relay KA2; switch KA2 closes and remains self-locking, activating push-button switch SB2-1, thus initiating the pressure test on the equipment at station 2.

[0125] when Figure 2 When the door SQ2 shown is opened, Figure 1 When the limit switch SQ2 is opened, the relay KA2 is de-energized; when switch KA2 is opened, the equipment at workstation 2 loses power and stops operating.

[0126] by Figure 3 For example, when it is determined from the test item information that the equipment at station 3 needs to undergo a pressure test, limit switches SQ3-1 and SQ3-2 are closed. Reset switches SR3-1 and SR3-2 are closed simultaneously, energizing relay KA3; switch KA3 is closed and remains self-locking, connecting push button switch SB3-1 to allow the equipment at station 3 to undergo a pressure test.

[0127] when Figure 2 When the door SQ3-1 and / or door SQ3-2 shown are opened, Figure 3 When limit switch SQ3-1 and / or limit switch SQ3-2 are disconnected, relay KA3 is de-energized, switch KA3 is disconnected, and equipment at workstation 3 loses power and stops operating.

[0128] It should be noted that, with Figure 3For example, when the double position switch S1 is pressed, the door interlock is short-circuited, the equipment at station 2 is in an uncontrolled working state, the relay KS is de-energized, the switch KS is opened, the relay KA2 is de-energized, and the equipment at station 2 cannot operate.

[0129] by Figure 3 For example, when any one or more of the two-position switches S2 and S3 are pressed, the door interlock is short-circuited, the equipment at workstation 3 is in an uncontrolled working state, relay KS is de-energized, switch KS is opened, relay KA3 is de-energized, and the equipment at workstation 3 cannot operate.

[0130] Step S605: When the test mode is the combined test mode, connect the switching control switch and the relay KA1.

[0131] by Figure 3 For example, the moving contact of the changeover switch SPDT is connected to the stationary contact 2, and the relay KA1 is energized. At this time, the equipment at station 2 and station 3 are both controlled by the limit switch SQ1 in station 1. When the limit switch SQ1 is opened, the relay KA1 is de-energized, and all equipment loses power and stops operating.

[0132] In practical applications, when equipment at a particular workstation needs to participate in a joint test, the corresponding door needs to be opened. At this time, the corresponding double-position switch is pressed to short-circuit the door's interlock. Figure 3 It can be seen that the current no longer flows through the switch KS circuit.

[0133] Step S606: When it is determined from the test project information that the equipment at station 2 and the equipment at station 1 in any workstation unit need to undergo a joint pressure test, close the limit switch SQ1; control the reset switches SR1-1 and SR1-2 to close simultaneously, so that the relay KA1 is energized; control the switch KA1 to close and maintain self-locking, and turn on the push button switch SB1-1.

[0134] Step S607: Close the limit switch SQ2 in the workstation equipment unit; control the reset switches SR2-1 and SR2-2 to close simultaneously, energizing the relay KA2; control switch KA2 to close and maintain self-locking, and connect the push button switch SB2-1 to perform a joint pressure test on the equipment at workstation 1 and workstation 2.

[0135] by Figure 3For example, when the test project information determines that the equipment at station 1, station 2, and station 3 needs to undergo a joint pressure test, the moving contact of the changeover switch SPDT connects to the stationary contact 2, the limit switch SQ1 is closed, and the reset switches SR1-1 and SR1-2 are pressed simultaneously, energizing relay KA1 and closing switch KA1; the SB1-1 switch button is pressed and closed, the double-position switch S1 is pressed, the limit switch SQ2 is short-circuited, the reset switches SR2-1 and SR2-2 are pressed simultaneously, energizing relay KA2 and closing switch KA2; the SB2-1 switch button is pressed and closed; the double-position switches S2 and S3 are pressed, the limit switches SQ3-1 and SQ3-2 are short-circuited, the reset switches SR3-1 and SR3-2 are pressed simultaneously, energizing relay KA3 and closing switch KA3; the SB3-1 switch button is pressed and closed; the equipment at station 1, station 2, and station 3 operate normally.

[0136] Understandably, if the test personnel forget to switch the changeover switch (single-pole double-throw switch) SPDT after the combined pressure test, and the moving contact remains connected to the stationary contact 2, then regardless of whether the doors of station 2 and station 3 are short-circuited or interlocked, all equipment will still be controlled by switch SQ1. If the changeover switch (single-pole double-throw switch) SPDT is switched after the combined pressure test, and the moving contact is connected to the stationary contact 1, then the double-position switches S1~S3 are in normal working condition when none of them are pressed; when any one or more of the double-position switches S1~S3 are pressed, relay KS is de-energized, and the equipment at station 2 and station 3 cannot operate.

[0137] In this embodiment of the invention, each area can be tested independently under normal conditions by switching control switches, thereby improving work efficiency. During joint testing, all workstation equipment units are controlled by the limit switch SQ1 at workstation 1 to meet the requirements of joint testing. Furthermore, the design based on a dual-position switch effectively prevents misoperation; when the dual-position switch is pressed, the corresponding equipment will lose power and stop operating, thus improving the safety of system operation. Combined with the design of a reset switch, this invention further enhances system security, prevents malicious or unauthorized operation, and standardizes the operating procedures, further improving work efficiency.

[0138] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0139] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0140] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A switchable door interlocking system with dual confirmation, characterized in that, The system includes: One end of the moving contact of the switching control switch is connected to several workstation equipment units respectively; The stationary contact 1 of the switching control switch is connected to switch KS; the common terminal of switch KS and limit switch SQ1 is connected to the live wire; the other end of limit switch SQ1 is connected to one end of reset switch SR1-1 and one end of the first normally open contact of relay KA1; reset switch SR1-1 and reset switch SR1-2 are connected in series; the other end of reset switch SR1-2 is connected to the other end of the first normally open contact of relay KA1, and the common terminal formed by the connection is connected to the neutral wire through the coil of relay KA1; The second normally open contact of the relay KA1 is connected to the push button switch SB1-1 and the workstation 1 device respectively; In any of the aforementioned workstation equipment units, the dual-position switch S1 and the limit switch SQ2 are connected in parallel. The first common terminal of the parallel connection is connected to one end of the moving contact of the switching control switch. The second common terminal of the parallel connection is connected to one end of the series branch of reset switches SR2-1 and SR2-2, and one end of the first normally open contact of relay KA2. The reset switches SR2-1 and SR2-2 are connected in series. The other end of the first normally open contact of the reset switch SR2-2 is connected to the first normally open contact of relay KA2. The common terminal formed by the connection is connected to the neutral wire through the coil of relay KA2. The second normally open contact of the relay KA2 is connected to the push button switch SB2-1 and the corresponding workstation 2 equipment respectively; The dual-position switches in several of the aforementioned workstation equipment units are connected in series and then connected to relay KS; When the equipment at workstation 1 is subjected to a pressure test, the moving contact of the switching control switch is switched to the stationary contact 1; the limit switch SQ1 is closed; the reset switches SR1-1 and SR1-2 are closed simultaneously, and the coil of the relay KA1 is energized; the first normally open contact and the second normally open contact of the relay KA1 are closed and remain self-locking, and the push button switch SB1-1 is turned on, so that the equipment at workstation 1 is subjected to a pressure test. When station 2 and station 1 in any of the aforementioned workstation equipment units undergo a joint pressure test, the moving contact of the switching control switch is switched to stationary contact 2; the limit switch SQ1 is closed; reset switches SR1-1 and SR1-2 are closed simultaneously, energizing the coil of relay KA1; the first and second normally open contacts of relay KA1 are closed and remain self-locking, activating push button switch SB1-1 and closing the limit switch SQ2; reset switches SR2-1 and SR2-2 are closed simultaneously, energizing the coil of relay KA2; the first and second normally open contacts of relay KA2 are closed and remain self-locking, activating push button switch SB2-1, thus enabling station 1 and station 2 to undergo a joint pressure test.

2. The system according to claim 1, characterized in that, When the workstation equipment unit includes two limit switches, the dual-position switch S2 and the limit switch SQ3-1 are connected in parallel, the dual-position switch S3 and the limit switch SQ3-2 are connected in parallel, and the limit switch SQ3-1 and the limit switch SQ3-2 are connected in series. The limit switch SQ3-2 is connected to one end of the series branch of reset switches SR3-1 and SR3-2 and one end of the first normally open contact of relay KA3; the reset switches SR3-1 and SR3-2 are connected in series; the other end of the reset switch SR3-2 is connected to the first normally open contact of relay KA3, and the common terminal formed by the connection is connected to the neutral wire through the coil of relay KA3; The second normally open contact of the relay KA3 is connected to the push button switch SB3-1 and the corresponding device.

3. The system according to claim 1, characterized in that, All reset switches are fingerprint recognition switches.

4. The system according to claim 1, characterized in that, The switching control switch is specifically a changeover switch SPDT or a normally closed switch; When the switching control switch is a SPDT changeover switch, one end of the moving contact of the SPDT changeover switch is connected to several workstation equipment units respectively; The stationary contact 1 of the changeover switch SPDT is connected to the switch KS; the common terminal of the switch KS and the limit switch SQ1 is connected to the live wire; the other end of the limit switch SQ1 is connected in series with the reset switches SR1-1 and SR1-2; the first normally open contact of the relay KA1 is connected in parallel with the reset switches SR1-1 and SR1-2; one end of the parallel connection is connected to the stationary contact 2 of the changeover switch SPDT, and the common terminal of the connection is connected to the neutral wire through the coil of the relay KA1. When the switching control switch is a normally closed switch KS, one end of the normally closed switch KS is connected to several workstation equipment units respectively; One end of the normally closed switch KS is also connected to switch KS; the common terminal of the switch KS and the limit switch SQ1 is connected to the live wire; the other end of the limit switch SQ1 is connected in series with reset switches SR1-1 and SR1-2; the first normally open contact of the relay KA1 is connected in parallel with the reset switches SR1-1 and SR1-2; one end of the parallel connection is connected to the other end of the normally closed switch, and the common terminal of the connection is connected to the neutral wire through the coil of the relay KA1.

5. The system according to claim 1, characterized in that, The distance between the reset switch SR1-1 and the reset switch SR1-2 is greater than a threshold. The distance between the reset switch SR2-1 and the reset switch SR2-2 is greater than a threshold.

6. The system according to claim 1, characterized in that, The system also includes: a first warning light, a second warning light, a third warning light, and a buzzer; The normally closed contact of relay KA1 is connected to the first warning light; the common terminal of the normally open contact of relay KS is connected in series with the common terminal of the normally open contact of relay KA1 and the second warning light. The common terminal of the normally closed contact of relay KS and the normally open contact of relay KA1, and the third warning light are connected in series. The buzzer is connected to the common terminal of the normally open contact of the relay KA1; Each of the aforementioned workstation equipment units is equipped with a corresponding first warning light, a second warning light, and a third warning light, as well as a buzzer.

7. A control method for a dual-confirmation switchable door interlocking system, characterized in that, Applied to the system according to any one of claims 1 to 6, the method comprises: Determine the test mode based on the test project information; When the test mode is independent test mode, the stationary contact 1 of the switching control switch is connected to the switch KS, and the switch KS is closed; When it is determined from the test item information that the equipment at workstation 1 needs to undergo a pressure test, close the limit switch SQ1; Reset switches SR1-1 and SR1-2 are closed simultaneously, energizing the coil of relay KA1; the first and second normally open contacts of relay KA1 close and remain self-locking, activating push button switch SB1-1, causing the equipment at workstation 1 to undergo a pressure test. When the test mode is the combined test mode, switch the moving contact of the switching control switch to connect the stationary contact 2 to the coil of the relay KA1; When it is determined, based on the test item information, that equipment at station 2 and equipment at station 1 in any workstation equipment unit need to undergo a joint pressure test, close the limit switch SQ1; control the reset switches SR1-1 and SR1-2 to close simultaneously, energizing the coil of relay KA1; control the first normally open contact and the second normally open contact of relay KA1 to close and maintain self-locking, and turn on the push button switch SB1-1. Close the limit switch SQ2 in the workstation equipment unit; control the reset switches SR2-1 and SR2-2 to close simultaneously, energizing the coil of relay KA2; control the first normally open contact and the second normally open contact of relay KA2 to close and maintain self-locking, and turn on the push button switch SB2-1 to perform a joint pressure test on the equipment at workstation 1 and the equipment at workstation 2.

8. The method according to claim 7, characterized in that, When the test mode is independent test mode, the connection between the stationary contact 1 of the switching control switch and switch KS is turned on. After switch KS is closed, the following is also included: When it is determined from the test item information that the equipment at station 2 in any workstation unit needs to undergo a pressure test, the limit switch SQ2 in the workstation unit is closed; at the same time, the reset switches SR2-1 and SR2-2 are closed, energizing the coil of the relay KA2; the first normally open contact and the second normally open contact of the relay KA2 are controlled to close and remain self-locking, and the push button switch SB2-1 is turned on, so that the equipment at station 2 undergoes a pressure test.

9. The method according to claim 7, characterized in that, When the test mode is independent test mode, the connection between the stationary contact 1 of the switching control switch and switch KS is turned on. After switch KS is closed, the following is also included: When the dual-position switch S1 in any of the aforementioned workstation equipment units is pressed, the equipment in the current workstation equipment unit cannot operate.

10. The method according to claim 7, characterized in that, When the test mode is the combined test mode, after switching the moving contact of the switching control switch to the stationary contact 2, it also includes: If limit switch SQ1 is disconnected, relay KA1 will be de-energized, and all equipment will lose power and stop operating.

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