Dual-confirmation switchable door interlocking system and control method

Abstract

The invention provides a double-confirmation switchable door interlocking system and a control method, the system comprises a switching control switch, a switch KS, each travel switch, a double-position switch and each reset switch, and every two reset switches form a group; the system further comprises a plurality of relays and station devices. In the system, independent testing of each area under normal conditions is realized by switching the control switch, so that the working efficiency is improved; during a combined test, all station equipment units are controlled through the travel switch SQ1 of the station 1 so as to meet the requirements of the combined test. Besides, misoperation can be effectively prevented based on the design of the double-position switch, and when the double-position switch is pressed down, corresponding equipment loses power and stops running, so that the safety of system operation is improved. In combination with the design of a reset switch, the system safety is further enhanced, malicious or unauthorized operation is prevented, meanwhile, the operation process is standardized, and the working efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automation control technology, and in particular to a double-confirmation switchable door interlock system and control method. BACKGROUND

[0002] In the production and testing process of high voltage, large current or mechanical movement, in order to ensure that personnel will not enter the dangerous area, the door interlock system plays a vital role. When the door is opened, the travel switch or photoelectric switch on the door will immediately switch from the on state to the off state, so that the equipment controlled by the door interlock is immediately powered off and stopped, ensuring safety.

[0003] The traditional door interlock technology relies on the travel switch trigger after the door is closed, so that the equipment can be operated after being powered on. However, the existing technology has some limitations, for example, only one short-circuit switch is installed on each door, and in the case of joint pressurization or large space occupied by test samples, the simple short-circuiting makes the door interlock lose its safety function, resulting in the equipment still being able to run, which poses a great safety hazard. In addition, the traditional door interlock technology lacks switching function and cannot ensure that all equipment is always in a controlled state. More seriously, the existing door interlock system only relies on the closure of the door to determine the safety of the operation, so even if one test engineer can still perform pressurization operation, it cannot meet the safety requirements of the operation procedure.

[0004] Therefore, how to improve the safety of the door interlock system is a problem that needs to be solved at present. SUMMARY

[0005] Therefore, the embodiments of the present application provide a double-confirmation switchable door interlock system and control method to solve the problem of low safety of the door interlock system.

[0006] To achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the present application discloses a double-confirmation switchable door interlock system, which comprises:

[0008] One end of the switching control switch is connected to a plurality of work station equipment units;

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

[0010] The switch KA1 is connected with the button switch SB1-1 and the station 1 equipment respectively;

[0011] The double position switch S1 in any station equipment unit is connected in parallel with the travel switch SQ2, and one end of the parallel connection is connected with the switch control switch, and the second common end of the parallel connection is connected in series with the reset switch SR2-1 and the reset switch SR2-2;

[0012] The switch KA2 is connected in parallel with the reset switch SR2-1 and the reset switch SR2-2, and one end of the parallel connection is connected with the zero line through the relay KA2;

[0013] The switch KA2 is connected with the button switch SB2-1 and the corresponding station 2 equipment respectively;

[0014] The double position switches in several station equipment units are connected in series and connected with the relay KS;

[0015] When the station 1 equipment is subjected to a pressure test, the travel switch SQ1 is closed, the reset switch SR1-1 and the reset switch SR1-2 are closed at the same time, the relay KA1 is electrified, the switch KA1 is closed and self-locked, the button switch SB1-1 is turned on, and the station 1 equipment is subjected to a pressure test;

[0016] When the station 2 equipment and the station 1 equipment in any station equipment unit are subjected to a combined pressure test, the switch control switch and the relay KA1 are turned on, the travel switch SQ1 is closed, the reset switch SR1-1 and the reset switch SR1-2 are closed at the same time, the relay KA1 is electrified, the switch KA1 is closed and self-locked, the button switch SB1-1 is turned on, the travel switch SQ2 is closed, the reset switch SR2-1 and the reset switch SR2-2 are closed at the same time, the relay KA2 is electrified, the switch KA2 is closed and self-locked, the button switch SB2-1 is turned on, and the station 1 equipment and the station 2 equipment are subjected to a combined pressure test.

[0017] Preferably, when the station equipment unit includes two travel switches, the double position switch S2 is connected in parallel with the travel switch SQ3-1 in the station equipment unit, the double position switch S3 is connected in parallel with the travel switch SQ3-2, and the travel switch SQ3-1 is connected in series with the travel switch SQ3-2;

[0018] The travel switch SQ3-2 is connected in series with the reset switch SR3-1 and the reset switch SR3-2, and the switch KA3 is connected in parallel with the reset switch SR3-1 and the reset switch SR3-2, and one end of the parallel connection is connected with the zero line through the relay KA3;

[0019] The switch KA3 is connected with the button switch SB3-1 and the corresponding equipment respectively.

[0020] Preferably, all the 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 changeover switch SPDT, one end of the moving contact of the changeover switch SPDT is connected to a plurality of workstation equipment units respectively.

[0023] The fixed contact 1 of the changeover switch SPDT is connected to a switch KS; the common end of the switch KS connected to a travel switch SQ1 is connected to a live wire; the other end of the travel switch SQ1 is connected in series to a reset switch SR1-1 and a reset switch SR1-2; a switch KA1 is connected in parallel to the reset switch SR1-1 and the reset switch SR1-2; one end of the parallel connection is connected to the fixed contact 2 of the changeover switch SPDT, and the common end of the connection is connected to a zero 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 a plurality of workstation equipment units respectively.

[0025] The other end of the normally closed switch KS is also connected to a switch KS; the common end of the switch KS connected to a travel switch SQ1 is connected to a live wire; the other end of the travel switch SQ1 is connected in series to a reset switch SR1-1 and a reset switch SR1-2; a switch KA1 is connected in parallel to the reset switch SR1-1 and the reset switch SR1-2; one end of the parallel connection is connected to the other end of the normally closed switch, and the common end of the connection is connected to a zero wire through the relay KA1.

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

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

[0028] Preferably, the system further comprises a first warning light, a second warning light, a third warning light, and a buzzer.

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

[0030] The normally closed contact of the relay KS is connected in series to the common end of the normally open contact of the relay KA1 and the third warning light.

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

[0032] Each of the work station equipment units is configured with a corresponding first warning light, a second warning light and a third warning light, and a buzzer.

[0033] The second aspect of the present application discloses a control method of a double-confirmation switchable door interlock system, applied to the system disclosed in the first aspect of the present application, and the method comprises:

[0034] According to the test item information, a test mode is determined;

[0035] When the test mode is a single test mode, the connection between the switching control switch and the switch KS is connected, and the switch KS is closed;

[0036] When it is determined according to the test item information that the work station 1 equipment needs to be subjected to a voltage boosting test, the travel switch SQ1 is closed;

[0037] The reset switch SR1-1 and the reset switch SR1-2 are simultaneously closed to electrify the relay KA1; the switch KA1 is closed and kept self-locked, the button switch SB1-1 is connected, and the work station 1 equipment is subjected to a voltage boosting test;

[0038] When the test mode is a joint test mode, the connection between the switching control switch and the relay KA1 is connected;

[0039] When it is determined according to the test item information that the work station 2 equipment and the work station 1 equipment in any work station equipment unit need to be subjected to a joint voltage boosting test, the travel switch SQ1 is closed; the reset switch SR1-1 and the reset switch SR1-2 are simultaneously controlled to be closed to electrify the relay KA1; the switch KA1 is controlled to be closed and kept self-locked, and the button switch SB1-1 is connected;

[0040] The travel switch SQ2 in the work station equipment unit is closed; the reset switch SR2-1 and the reset switch SR2-2 are simultaneously controlled to be closed to electrify the relay KA2; the switch KA2 is controlled to be closed and kept self-locked, and the button switch SB2-1 is connected, so that the work station 1 equipment and the work station 2 equipment are subjected to a joint voltage boosting test.

[0041] Preferably, when the test mode is a single test mode, after the connection between the switching control switch and the switch KS is connected and the switch KS is closed, the method further comprises:

[0042] When it is determined according to the test item information that the work station 2 equipment in any work station equipment unit needs to be subjected to a voltage boosting test, the travel switch SQ2 in the work station equipment unit is closed; the reset switch SR2-1 and the reset switch SR2-2 are simultaneously closed to electrify the relay KA2; the switch KA2 is controlled to be closed and kept self-locked, and the button switch SB2-1 is connected, so that the work station 2 equipment is subjected to a voltage boosting test.

[0043] Preferably, when the test mode is a single test mode, the switching control switch is connected to the switch KS, and after the switch KS is closed, the system further comprises:

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

[0045] Preferably, when the test mode is a joint test mode, the switching control switch is connected to the relay KA1, and after the relay KA1 is connected, the system further comprises:

[0046] If the travel switch SQ1 is disconnected, the relay KA1 loses power, and all the equipment stops operating.

[0047] Based on the above-mentioned double-confirmation and switchable door interlocking system and control method provided by the embodiment of the application, the system 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 station equipment. In the system, the switching control switch is used to realize independent testing of each area under normal circumstances, so as to improve work efficiency; when joint testing is performed, the travel switch SQ1 of station 1 is used to control all the station equipment units, so as to meet the joint testing requirement. In addition, the design of the double-position switch can effectively prevent misoperation, and when the double-position switch is pressed, the corresponding equipment will lose power and stop operating, thereby improving the safety of system operation. In combination with the design of the reset switch, the system safety is further enhanced, malicious or unauthorized operation is prevented, the operation process is standardized, and work efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0049] Figure 1 The first schematic diagram of the double-confirmation and switchable door interlocking system provided by the embodiment of the application;

[0050] Figure 2 The test station and door interlocking arrangement schematic diagram provided by the embodiment of the application;

[0051] Figure 3 The second schematic diagram of the double-confirmation and switchable door interlocking system provided by the embodiment of the application;

[0052] Figure 4A third schematic view of the double-confirmed switchable door interlock system according to an embodiment of the present application is provided;

[0053] Figure 5 A fourth schematic view of the double-confirmed switchable door interlock system according to an embodiment of the present application is provided;

[0054] Figure 6 A flow chart of the control method of the double-confirmed switchable door interlock system according to an embodiment of the present application is provided. DETAILED DESCRIPTION

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

[0056] In the present application, the terms “comprise”, “contain” or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement “comprises a” does not exclude the presence of another identical element in the process, method, article or equipment comprising the element.

[0057] As known from the background, the conventional door interlock technology has limitations, such as the short-circuit switch losing safety effect, lacking switching function, and relying only on door closing to judge operation safety, which leads to inability to effectively ensure the safety of the equipment in operation.

[0058] Therefore, the embodiments of the present application provide a double-confirmed switchable door interlock system and a control method. The system 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 region is independently tested under normal circumstances through the switching control switch 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 to meet the joint testing requirements. 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 lose power and stop running, thereby improving the safety of system operation. In combination with the design of the reset switch, the system safety is further enhanced to prevent malicious or unauthorized operation, and the operation process is standardized to further improve work efficiency.

[0059] Referring to Figure 1 , a first schematic diagram of a double-confirmation switchable door interlock system is shown. The system includes the following:

[0060] Specifically, one end of the switch control switch is connected to a plurality of work station equipment units.

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

[0062] Specifically, the common end of the switch KS connected to the travel switch SQ1 is connected to the live wire L.

[0063] As shown in Figure 1 , the other end of the travel switch SQ1 is connected in series to the reset switch SR1-1 and the reset switch SR1-2; the switch KA1 is connected in parallel to the reset switch SR1-1 and the reset switch SR1-2; one end of the parallel connection is connected to the other end of the switch control switch (i.e., the switch control switch is connected to one end of the parallel connection through the connection position 2), and the common end of the connection is connected to the neutral wire N through the relay KA1.

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

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

[0066] It can be understood that the double-position switch has four terminals, and two terminals form a group. As shown in Figure 1 , the terminals on the L-X1 side are connected in series as an anti-misoperation circuit; the two terminals near the travel switch SQ2 form a group and are connected in parallel to the two terminals of the corresponding travel switch SQ2.

[0067] As shown in Figure 1 , the double-position switch S1 in any work station equipment unit is connected in parallel to the travel switch SQ2, the first common end of the parallel connection is connected to one end of the switch control switch, and the second common end of the parallel connection is connected in series to the reset switch SR2-1 and the reset switch SR2-2.

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

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

[0070] In specific embodiments, the double position switches in several work station equipment units are connected in series with the relay KS (see the following detailed description Figure 3 The double position switches S1, S2 and S3 are connected in series with the relay KS).

[0071] It should be noted that when the work station 1 equipment is subjected to a pressure test, the switching control switch is set to position 1, the travel switch SQ1 is closed, the reset switches SR1-1 and SR1-2 are closed at the same time, the relay KA1 is energized, the switch KA1 is closed and self-locked, and the button switch SB1-1 is turned on, so that the work station 1 equipment is subjected to a pressure test.

[0072] It can be understood that when the work station 2 equipment and the work station 1 equipment in any work station equipment unit are subjected to a combined pressure test, the switching control switch is turned on (at this time, the switching control switch is set to position 2) and the relay KA1 is connected; the travel switch SQ1 is closed; the reset switches SR1-1 and SR1-2 are closed at the same time, the relay KA1 is energized; the switch KA1 is closed and self-locked, and the button switch SB1-1 is turned on. The travel switch SQ2 is closed; the reset switches SR2-1 and SR2-2 are closed at the same time, the relay KA2 is energized; the switch KA2 is closed and self-locked, and the button switch SB2-1 is turned on, so that the work station 1 equipment and the work station 2 equipment are subjected to a combined pressure test.

[0073] In order to better illustrate the double-confirmation switchable door interlock system provided by the embodiment of the present application, the following will be described in combination with Figure 2 The test work station and the door interlock arrangement shown in the schematic diagram are used to further illustrate the double-confirmation switchable door interlock system provided by the embodiment of the present application.

[0074] As shown in Figure 2 In actual application, the test hall is divided into multiple test work stations, such as work station 1, work station 2 and work station 3, according to different test items and test equipment. Under normal circumstances, each test work station is independently subjected to a test, and in a combined test, multiple work stations often need to be simultaneously subjected to a test, for example, the equipment in the work station 1, work station 2 and work station 3 is used to perform a combined pressure test on a test product. Therefore, the double-confirmation switchable door interlock system provided by the embodiment of the present application is used to achieve the purpose of independently performing a test on each test work station or jointly performing a test.

[0075] Corresponding Figure 2 to each test work station, under normal circumstances, the travel switch SQ1 (such as the door SQ1 shown in Figure 2 is used to control the equipment 1-1 to 1-n in the work station 1, and the travel switch SQ2 (such as the door SQ2 shown in 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 applicationsFigure 1 The switching control switch is specifically a changeover switch SPDT (single-pole double-throw switch) or a normally closed switch.

[0082] In some embodiments, the changeover switch SPDT and all double-position switches need to be inserted with a key to operate, and the key is kept by a designated person.

[0083] As shown in the figure, when the switching control switch is a changeover switch SPDT, one end of the moving contact of the changeover switch SPDT is connected to a plurality of workstation equipment units. Figure 3 Specifically, the static contact 1 of the changeover switch SPDT is connected to the switch KS; the common end of the switch KS connected to the travel switch SQ1 is connected to the live wire; the other end of the travel switch SQ1 is connected in series with the reset switch SR1-1 and the reset switch SR1-2; the switch KA1 is connected in parallel with the reset switch SR1-1 and the reset switch SR1-2; one end of the parallel connection is connected to the static contact 2 of the changeover switch SPDT, and the common end is connected to the zero line through the relay KA1.

[0084] The switch KA1 is connected to the button switch SB1-1 and the workstation 1 equipment, respectively.

[0085] The double-position switch S1 in any workstation equipment unit is connected in parallel with the travel switch SQ2, the first common end of the parallel connection is connected to one end of the moving contact of the changeover switch SPDT, and the second common end of the parallel connection is connected in series with the reset switch SR2-1 and the reset switch SR2-2.

[0086] The switch KA2 is connected in parallel with the reset switch SR2-1 and the reset switch SR2-2; one end of the parallel connection is connected to the zero line through the relay KA2.

[0087] The switch KA2 is connected to the button switch SB2-1 and the corresponding workstation 2 equipment, respectively.

[0088] The double-position switches in a plurality of workstation equipment units are connected in series and connected to the relay KS.

[0089] As shown in the figure, when the switching control switch is a normally closed switch KS, one end of the normally closed switch KS is connected to a plurality of workstation equipment units.

[0090] Figure 4 Specifically, one end of the normally closed switch KS is also connected to the switch KS; the common end of the switch KS connected to the travel switch SQ1 is connected to the live wire; the other end of the travel switch SQ1 is connected in series with the reset switch SR1-1 and the reset switch SR1-2; the switch KA1 is connected in parallel with the reset switch SR1-1 and the reset switch SR1-2; one end of the parallel connection is connected to the other end of the normally closed switch, and the common end is connected to the zero line through the relay KA1.

[0091] The switch KA2 is connected to the button switch SB2-1 and the corresponding workstation 2 equipment, respectively.

[0092] ​Switch KA1 is connected with button switch SB1-1 and station 1 equipment respectively.

[0093] Double position switch S1 in any station equipment unit is connected with travel switch SQ2 in parallel, one end of the common end in parallel is connected with one end of normally closed switch KS, and the second common end in parallel is connected with reset switch SR2-1 and reset switch SR2-2 in series.

[0094] Switch KA2 is connected with reset switch SR2-1 and reset switch SR2-2 in parallel, and one end of the common end in parallel is connected with zero line through relay KA2.

[0095] Switch KA2 is connected with button switch SB2-1 and corresponding station 2 equipment respectively.

[0096] Double position switches in several station equipment units are connected in series and connected with relay KS.

[0097] Referring to Figure 5 the content shown, the system further comprises: first warning light, second warning light, third warning light and buzzer.

[0098] Specifically, the normally closed contact of relay KA1 is connected with first warning light (for example, green warning light shown in Figure 5 ); the common end of normally open contact of relay KS is connected with the common end of normally open contact of relay KA1, and second warning light (for example, red warning light shown in Figure 5 ) in series.

[0099] Specifically, the normally closed contact of relay KS is connected with the common end of normally open contact of relay KA1, and third warning light (for example, yellow warning light shown in Figure 5 ) in series.

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

[0101] It can be understood that each station equipment unit is configured with corresponding first warning light, second warning light and third warning light, and buzzer.

[0102] For example, referring to Figure 5 the content shown, the normally closed contact of relay KA2 is connected with first warning light (for example, green warning light shown in Figure 5 ); the common end of normally open contact of relay KS is connected with the common end of normally open contact of relay KA2, and second warning light (for example, red warning light shown in Figure 5 ) in series.

[0103] Specifically, the normally closed contact of relay KS is connected with the common end of normally open contact of relay KA1, and the common end of normally open contact of relay KA2, and third warning light (for example, yellow warning light shown in Figure 5The common terminal of the normally open contact of the relay KA2 is connected with the buzzer.

[0104] It should be noted that the buzzer is connected with the common terminal of the normally open contact of the relay KA3.

[0105] For example, in combination with the content shown in the figure, the normally closed contact of the relay KA3 is connected with the first warning light (for example, the yellow warning light shown in the figure); the common terminal of the normally open contact of the relay KA3 is connected with the common terminal of the normally open contact of the relay KA1, and the second warning light (for example, the red warning light shown in the figure) is connected in series. Figure 5 Figure 5 For example, in combination with the content shown in the figure, the normally closed contact of the relay KA3 is connected with the first warning light (for example, the yellow warning light shown in the figure); the common terminal of the normally open contact of the relay KA3 is connected with the common terminal of the normally open contact of the relay KA1, and the second warning light (for example, the red warning light shown in the figure) is connected in series. Figure 5

[0106] For example, in combination with the content shown in the figure, the normally closed contact of the relay KA3 is connected with the first warning light (for example, the yellow warning light shown in the figure); the common terminal of the normally open contact of the relay KA3 is connected with the common terminal of the normally open contact of the relay KA1, and the second warning light (for example, the red warning light shown in the figure) is connected in series. Figure 5

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

[0108] In a specific application, for example, the station 2, when the station 2 is not tested, the KA2 coil is not attracted, the green warning light circuit is electrified due to the connection of the KA2 normally closed contact, the green warning light is always on, representing safety. When the station 2 is tested alone, the KS coil is attracted, the KA2 coil is attracted, the KS and KA2 normally open contacts are closed, the red warning light is on, representing danger, indicating that the equipment in the station 2 is independently tested; at this time, the KA2 normally closed contact is opened, and the green warning light is extinguished.

[0109] When the station 2 is tested by joint voltage, the KS coil is not electrified, the KA2 and KA1 coils are attracted, the KS normally closed contact is closed, the KA2 and KA1 normally open contacts are closed, and the yellow warning light is on, representing danger, indicating that the joint voltage test is being performed.

[0110] It should be particularly noted that the buzzer is controlled by the normally open contact of the relay in each station, and the test is alarmed.

[0111] It can be understood that the control logic of the warning lights and the buzzer of the other stations is the same as that of the station 2, and will not be described 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 joint pressure test is determined according to the test project information, the moving contact of the switch SPDT is connected to the static contact 2, the travel switch SQ1 is closed, the reset switches SR1-1 and SR1-2 are pressed at the same time, the relay KA1 is powered, and the switch KA1 is closed; the SB1-1 switch button is pressed and closed, the double-position switch S1 is pressed, the travel switch SQ2 is short-circuited, the reset switches SR2-1 and SR2-2 are pressed at the same time, the relay KA2 is powered, and the switch KA2 is closed; the SB2-1 switch button is pressed and closed; the double-position switches S2 and S3 are pressed, the travel switches SQ3-1 and SQ3-2 are short-circuited, the reset switches SR3-1 and SR3-2 are pressed at the same time, the relay KA3 is powered, and the switch KA3 is closed; the SB3-1 switch button is pressed and closed; the devices of the stations 1, 2 and 3 work normally.

[0136] It can be understood that if the test personnel forget to switch the switch (single-pole double-throw switch) SPDT after the joint pressure test is completed, the moving contact is still connected to the static contact 2, and regardless of whether the doors of the stations 2 and 3 are short-circuited or not, all the devices are still controlled by the switch SQ1. If the switch (single-pole double-throw switch) SPDT is switched after the joint pressure test is completed, the moving contact is connected to the static contact 1, and when none of the double-position switches S1-S3 is pressed, it is in a normal working state; when any one or more of the double-position switches S1-S3 is pressed, the relay KS loses power, and the devices of the stations 2 and 3 cannot work.

[0137] In the embodiment of the application, the switching control switch is used to realize independent test of each area in a normal state, so as to improve the work efficiency; in the joint test, the travel switch SQ1 of the station 1 is used to control all the device units of the stations, so as to meet the joint test requirement. In addition, the design based on the double-position switch can effectively prevent misoperation, when the double-position switch is pressed, the corresponding device will lose power and stop running, so as to improve the safety of system operation. In combination with the design of the reset switch, the system safety is further improved, malicious or unauthorized operation is prevented, the operation process is standardized, and the work efficiency is further improved.

[0138] The various embodiments described in this specification are described in progressive order, with each embodiment building on the previous one. The same or similar elements in each embodiment are denoted by the same or similar reference signs. For each embodiment, the differences between that embodiment and the preceding ones are described in more detail. In particular, the system or system embodiments are described more briefly than the method embodiments, since they are substantially similar to the method embodiments. The system and system embodiments described above are merely illustrative, and the units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. can be located at one place or distributed over multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments. Those skilled in the art can understand and implement without creative labor.

[0139] The person skilled in the art will further appreciate that the units and algorithm steps of the examples described in connection with the embodiments disclosed herein can be realized in electronic hardware, computer software, or a combination of both. The disclosure has been presented in the form of functional generalizations so as to clearly illustrate the interchangeability of hardware and software. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. The person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0140] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the application. Therefore, the present application is not to be limited to the embodiments shown herein, but is to be consistent with 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 switching control switch is connected to several workstation equipment units respectively; 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; The switch KA1 is connected to the push button switch SB1-1 and the workstation 1 device respectively; 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. 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. The switch 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 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. 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, activating push button switch SB1-1 and deactivating limit switch SQ2; reset switches SR2-1 and SR2-2 are simultaneously closed, energizing relay KA2; switch KA2 is closed and remains 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 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. The switch 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 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; 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 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.

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 connection between the switching control switch and switch KS is turned on, and 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 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; When the test mode is the combined test mode, connect the switching control switch and 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 relay KA1; control the switch 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 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.

8. The method according to claim 7, characterized in that, When the test mode is 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 taken: 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.

9. The method according to claim 7, characterized in that, When the test mode is 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 taken: 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 connecting the switching control switch and relay KA1, the following is also included: If limit switch SQ1 is disconnected, relay KA1 will be de-energized, and all equipment will lose power and stop operating.

Images