CN113539751B - Contact monitoring device of high-voltage direct-current relay - Google Patents
Contact monitoring device of high-voltage direct-current relay Download PDFInfo
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- CN113539751B CN113539751B CN202110611967.3A CN202110611967A CN113539751B CN 113539751 B CN113539751 B CN 113539751B CN 202110611967 A CN202110611967 A CN 202110611967A CN 113539751 B CN113539751 B CN 113539751B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
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Abstract
The invention discloses a contact monitoring device of a high-voltage direct-current relay, which belongs to the technical field of relays and comprises an iron core, a moving contact and a static contact, wherein an auxiliary moving contact is installed on the iron core through a connecting push rod, an auxiliary static contact is arranged right above the auxiliary moving contact, a first infrared emitter electrically connected with the auxiliary static contact is arranged beside the auxiliary static contact, and a first infrared receiver is arranged right below the first infrared emitter; a second infrared transmitter is arranged on the upper end face of the moving contact, and a second infrared receiver is arranged right above the second infrared transmitter; the shell is externally provided with a controller and an alarm which are electrically connected, and the two infrared receivers are electrically connected with the controller. The invention can more finely detect whether the iron core has problems, can detect whether the main contact and the high-voltage circuit where the main contact is located have problems, can monitor the relay in real time in the application circuit of the relay, and can send out an alarm in time when the relay has problems.
Description
Technical Field
The invention relates to the technical field of relays, in particular to a contact monitoring device of a high-voltage direct-current relay.
Background
The existing switch has the functions that an electromagnet is arranged in the switch, the electromagnet generates a magnetic field by introducing small current to a coil of the electromagnet, the armature is attracted or loosened by utilizing the generation or disappearance of the magnetic field, and then the attraction or disconnection between the conductive elastic sheets is driven, so that the conduction of a large-current loop is realized; however, after the relay is used for a long time, because the parts in the relay are aged, the stability is worse and worse, for example, the iron core of the relay slides unsmoothly, the contact of the conductive piece is poor, if the relay is not checked and maintained in time, the function of the electrical equipment is unstable or invalid, and therefore a large amount of manpower is consumed for overhauling.
At present, in the prior art, a contact monitoring device of a high-voltage direct-current relay is disclosed in a patent with application publication number CN 110223884 a, which is provided with a signal circuit and a conductive elastic sheet, wherein one end of the signal circuit is provided with a pair of connecting terminals, the conductive elastic sheet is located below the connecting terminals and is provided with a push rod fixedly connected with the bottom end of an iron core, and the push rod is connected with the conductive elastic sheet. After the relay coil is electrified, the iron core drives the push rod to rise, the elastic free end of the conductive elastic sheet is lifted upwards to be in contact with the two connecting terminals, so that the signal circuit is conducted, and an indicator lamp on the signal circuit is lightened to prompt the high-voltage circuit to be conducted; after the relay coil is powered off, the iron core drives the push rod to descend, the elastic free end of the conductive elastic sheet is reset downwards to be separated from the two connecting terminals, the signal circuit is disconnected, the indicating lamp on the signal circuit is turned off at the moment, the high-voltage circuit is prompted to be not conducted, and therefore the working state of the relay can be effectively monitored. However, it can only detect the status of the iron core ascending and descending (the indicator light is on to indicate the iron core ascending, and the indicator light is off to indicate the iron core descending), but cannot detect whether the main contact and the high-voltage circuit where the main contact is located have problems, and the scheme cannot monitor the relay in real time in the application circuit of the relay, and even cannot give an alarm in time when the iron core or the main contact of the relay and the high-voltage circuit where the main contact is located have problems.
Disclosure of Invention
1. Technical problem to be solved
The technical problem to be solved by the invention is to provide a contact monitoring device of a high-voltage direct-current relay, which can detect whether a main contact and a high-voltage circuit where the main contact is located have problems, can detect whether an iron core has problems more finely, can monitor the relay in an application circuit of the relay in real time, and can give an alarm in time when the relay has problems, thereby effectively solving the problems in the prior art.
2. Technical scheme
In order to solve the problems, the invention adopts the following technical scheme:
a contact monitoring device of a high-voltage direct-current relay comprises an iron core arranged in a shell, a moving contact connected to the upper end of the iron core, and two static contacts connected to the top of the shell, wherein the moving contact is positioned right below the two static contacts; a transversely arranged connecting push rod is fixedly connected to the iron core, an auxiliary moving contact is mounted at one end of the upper end face of the connecting push rod, an auxiliary fixed contact fixedly connected with the shell is arranged right above the auxiliary moving contact, a first infrared transmitter fixedly connected with the shell is arranged beside the auxiliary fixed contact, the auxiliary moving contact and the auxiliary fixed contact are connected to a power-on circuit of the first infrared transmitter, and a first infrared receiver used for receiving infrared rays emitted by the first infrared transmitter is arranged right below the first infrared transmitter; the upper end surface of the moving contact is provided with a second infrared emitter positioned in the middle and conducting strips positioned on two sides and connected with the second infrared emitter, and a second infrared receiver used for receiving infrared rays emitted by the second infrared emitter is arranged right above the second infrared emitter;
the infrared relay comprises a shell, a first infrared receiver, a second infrared receiver, a controller and an alarm, wherein the controller and the alarm are arranged outside the shell, the first infrared receiver and the second infrared receiver are both in telecommunication connection with the input end of the controller, the output end of the controller is in telecommunication connection with the alarm, when a relay coil is powered on, if the first infrared receiver and the second infrared receiver both receive infrared rays, the controller does not start the alarm to send an alarm, and if the first infrared receiver and/or the second infrared receiver do not receive the infrared rays, the controller starts the alarm to send an alarm; when the relay coil is powered off, if the first infrared receiver and the second infrared receiver do not receive infrared rays, the controller does not start the alarm to send out an alarm, and if the first infrared receiver and/or the second infrared receiver receive the infrared rays, the controller starts the alarm to send out an alarm.
Furthermore, a first warning unit and a second warning unit are arranged in the alarm, the first warning unit and the second warning unit have different warning effects, when the relay coil is electrified, if the first infrared receiver does not receive infrared rays, the controller starts the alarm to send an alarm through the first warning unit, and if the second infrared receiver does not receive infrared rays, the controller starts the alarm to send an alarm through the second warning unit; when the relay coil is powered off, if the first infrared receiver receives infrared rays, the controller starts the alarm and gives an alarm through the first warning unit, and if the second infrared receiver receives the infrared rays, the controller starts the alarm and gives an alarm through the second warning unit. Namely, if the iron core does not normally ascend or descend, an alarm is given out through the first warning unit, and if the main contact (comprising the moving contact and the static contact) is not normally connected or disconnected, an alarm is given out through the second warning unit. Therefore, as long as the related personnel observe the warning effect of the first warning unit (no matter whether the second warning unit gives an alarm or not), the iron core is indicated to be not normally operated; as long as relevant personnel observe the warning effect of the second warning unit and the first warning unit does not give an alarm, the main contact and the high-voltage circuit where the main contact is located are indicated to have problems.
Further, the first infrared receiver and the second infrared receiver are arranged on the outer side of the shell, through holes for infrared rays to pass through are formed in corresponding positions of the shell, transparent glass sheets are fixed in the through holes, and the first infrared receiver and the second infrared receiver are fixedly connected with the shell through mounting support plates. The infrared receiver is arranged outside the shell, so that the infrared receiver can be electrically connected with the controller conveniently; through setting up transparent glass piece can ensure the infrared transmission between infrared emitter and the infrared receiver, can satisfy the sealed requirement of casing simultaneously.
Furthermore, the connecting push rod is fixedly connected to the lower end of the iron core, the shell is divided into an upper cavity and a lower cavity, the moving contact is located in the upper cavity, and the auxiliary moving contact and the auxiliary stationary contact are located in the lower cavity. The main contact and the auxiliary contact (including the auxiliary movable contact and the auxiliary fixed contact) are arranged in a separated mode, so that mutual influence between the main contact and the auxiliary movable contact can be avoided, and the reliability of the relay is guaranteed.
As an improvement to the above scheme, the lower end of the shell is detachably connected with a dynamic monitoring mechanism, and the dynamic monitoring mechanism comprises a dynamic monitoring circuit provided with a slide rheostat and a connecting rod assembly penetrating through the bottom of the shell, detachably and fixedly connected with the iron core and fixedly connected with a slide sheet of the slide rheostat. The gleitbretter passes through link assembly and iron core linkage connection, when the iron core rises or descends, accessible link assembly drives the gleitbretter and removes, it can change the resistance value of slide rheostat, can change the output current of dynamic monitoring circuit, when detecting the relay, can obtain the graph of dynamic monitoring circuit output current through dynamic monitoring mechanism, can know the change volume of output current in every unit interval through this graph, if this change volume appears unusually in certain unit interval, then explain the iron core removal problem in this unit interval, thereby can be meticulous understand the concrete position that goes wrong in the moving range of iron core, thereby be favorable to finding the problem fast and solve the problem.
Further, the lower extreme of iron core is seted up threaded hole, link assembly includes the spiro union pole with screw hole threaded connection, fixed connection is at the lift short column of spiro union pole lower extreme to and connect the connecting rod at lift short column lower extreme, the upper end of connecting rod is fixed with the inside limit stop who is located lift short column, limit stop's width is greater than the diameter of connecting rod, the inside mounting groove that supplies limit stop relative rotation of offering of lift short column. When installation dynamic monitoring mechanism, pass casing bottom and rotation lift short column with spiro union pole and lift short column for spiro union pole threaded connection is in the threaded hole, and is rotating the in-process of lift short column, through the structure of limit stop and mounting groove, makes the connecting rod can keep not changeing, later, at the lift in-process of iron core, lift short column and connecting rod homoenergetic carry out the lift thereupon and remove, in order to realize the regulation to the slide rheostat.
Further, the bottom of the shell is provided with a through hole for the lifting short column to pass through, and the through hole is provided with a sealing plug which is enough to seal the through hole. When the dynamic monitoring mechanism is not required to be installed, the through hole can be blocked by the sealing plug, so that the sealing requirement of the shell is guaranteed.
3. Advantageous effects
(1) The invention is provided with an auxiliary moving contact, an auxiliary stationary contact, a first infrared transmitter and a first infrared receiver, wherein the auxiliary moving contact is linked with an iron core, the auxiliary moving contact and the auxiliary stationary contact are both connected on an electrified circuit of the first infrared transmitter, if the first infrared receiver receives infrared rays, the auxiliary moving contact ascends along with the iron core, and the iron core is positioned at a higher position; if the first infrared receiver does not receive infrared rays, the iron core is positioned at a lower position. Then, if the first infrared receiver does not receive infrared rays when the relay coil is powered on or can still receive infrared rays when the relay coil is powered off, the problem of the iron core exists. And, after installation dynamic monitoring mechanism, through observing the change curve of dynamic monitoring circuit output current, the concrete position that goes wrong appears in the home range that can be meticulous understanding iron core to be favorable to finding the problem faster and solving the problem, the detection iron core that can be more meticulous whether has the problem.
(2) The invention is provided with a second infrared transmitter and a second infrared receiver, wherein the second infrared transmitter and conducting strips on two sides of the second infrared transmitter are both arranged on a moving contact; if the second infrared receiver does not receive the infrared rays, the two fixed contacts and the high-voltage circuit where the two fixed contacts are located are not conducted. Then, on the condition that the iron core has no problem, if the second infrared receiver does not receive infrared rays when the relay coil is powered on or can still receive infrared rays when the relay coil is powered off, the two fixed contacts and the high-voltage circuit where the two fixed contacts are located have problems.
(3) The invention also comprises a controller and an alarm, wherein the first infrared receiver and the second infrared receiver are both in telecommunication connection with the input end of the controller, the output end of the controller is in telecommunication connection with the alarm, and when the relay coil is electrified, if the first infrared receiver and/or the second infrared receiver do not receive infrared rays, the controller starts the alarm to give an alarm; when the relay coil is powered off, if the first infrared receiver and/or the second infrared receiver receive infrared rays, the controller starts the alarm to give an alarm. The invention can monitor the relay in real time in the application process of the relay and can send out an alarm in time when the relay has problems. And through setting up first warning unit and second warning unit, can confirm whether the iron core has a problem, also can main contact and its high-voltage circuit in place have a problem.
In conclusion, the invention can more finely detect whether the iron core has problems, can detect whether the main contact and the high-voltage circuit where the main contact is located have problems, can monitor the relay in real time in the application circuit of the relay, and can timely give an alarm when the relay has problems.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the internal structure of the present invention in embodiment 2;
FIG. 2 is a schematic view of a control system according to the present invention in embodiment 2;
FIG. 3 is a schematic view showing an external configuration of the present invention in which a dynamic monitoring mechanism is incorporated in embodiment 3;
FIG. 4 is a schematic view showing the internal structure of the present invention in example 3 without the dynamic monitoring mechanism;
FIG. 5 is a schematic view showing the internal structure of the dynamic monitoring mechanism of the present invention in example 3;
fig. 6 is a circuit diagram of the dynamic monitoring circuit, in which E denotes a power supply, R denotes a sliding variable resistor 15, and JC denotes an output current detector.
Reference numerals: 1. connecting a push rod; 2. auxiliary moving contacts; 3. a first infrared receiver; 4. a first infrared emitter; 5. an auxiliary stationary contact; 6. an iron core; 7. a moving contact; 8. a second infrared emitter; 9. a transparent glass sheet; 10. a second infrared receiver; 11. static contact; 12. mounting a carrier plate; 13. a controller; 14. an alarm; 141. a first warning unit; 142. a second warning unit; 15. a slide rheostat; 16. a short lifting column; 17. a connecting rod; 18. sliding blades; 19. a threaded hole; 20. a port; 21. a sealing plug; 22. a screw connection rod; 23. and a limit stop.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a second feature of an inlet feature may include the inlet and the second feature being in direct contact, or may include the inlet and the second feature not being in direct contact but being in contact with another feature therebetween. Also, the terms "over," "above," and "above" the second feature include the inlet feature being directly above and obliquely above the second feature, or simply indicating that the inlet feature is at a higher level than the second feature. The terms "under", "below" and "beneath" of an inlet feature encompass the inlet feature being directly under and obliquely below the second feature, or simply meaning that the inlet feature is less level than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example 1
The contact monitoring device of the high-voltage direct-current relay shown in fig. 1 comprises an iron core 6 arranged in a shell, a moving contact 7 connected to the upper end of the iron core 6, and two static contacts 11 connected to the top of the shell, wherein the moving contact 7 is positioned right below the two static contacts 11; a transversely arranged connecting push rod 1 is fixedly connected to the iron core 6, an auxiliary moving contact 2 is mounted at one end of the upper end face of the connecting push rod 1, an auxiliary fixed contact 5 fixedly connected with the shell is arranged right above the auxiliary moving contact 2, a first infrared emitter 4 fixedly connected with the shell is arranged beside the auxiliary fixed contact 5, the auxiliary fixed contact 5 and the first infrared emitter 4 are mounted on a fixed frame which is fixedly connected inside the shell, the auxiliary moving contact 2 and the auxiliary fixed contact 5 are connected to an electrified circuit of the first infrared emitter 4, and a first infrared receiver 3 used for receiving infrared rays emitted by the first infrared emitter 4 is arranged right below the first infrared emitter 4; a second infrared emitter 8 positioned in the middle and conducting strips positioned on two sides and connected with the second infrared emitter 8 are installed on the upper end surface of the moving contact 7, and a second infrared receiver 10 for receiving infrared rays emitted by the second infrared emitter 8 is arranged right above the second infrared emitter 8;
a controller 13 and an alarm 14 are arranged outside the housing, as shown in fig. 2, the first infrared receiver 3 and the second infrared receiver 10 are both in telecommunication connection with an input end of the controller 13, an output end of the controller 13 is in telecommunication connection with the alarm 14, when the relay coil is powered on, if the first infrared receiver 3 and the second infrared receiver 10 both receive infrared rays, the controller 13 does not start the alarm 14 to send an alarm, and if the first infrared receiver 3 and/or the second infrared receiver 10 do not receive infrared rays, the controller 13 starts the alarm 14 to send an alarm; when the relay coil is powered off, if neither the first infrared receiver 3 nor the second infrared receiver 10 receives infrared rays, the controller 13 does not start the alarm 14 to send out an alarm, and if the first infrared receiver 3 and/or the second infrared receiver 10 receive infrared rays, the controller 13 starts the alarm 14 to send out an alarm. Once the alarm 14 gives an alarm, it indicates that there is a problem with the movement of the core 6 or the main contacts and the high voltage circuit in which they are located in the relay.
Example 2
The present embodiment is different from embodiment 1 in that:
in this embodiment, as shown in fig. 2, a first warning unit 141 and a second warning unit 142 are provided in the alarm 14, the first warning unit 141 and the second warning unit 142 have different warning effects (for example, the difference between warning sounds, one warning effect is periodic long sound, the other warning effect is periodic short sound, and the two warning sounds are output through two sound players), when the relay coil is energized, if the first infrared receiver 3 does not receive infrared rays, the controller 13 starts the alarm 14 to send an alarm through the first warning unit 141, and if the second infrared receiver 10 does not receive infrared rays, the controller 13 starts the alarm 14 to send an alarm through the second warning unit 142; when the relay coil is de-energized, if the first infrared receiver 3 receives infrared rays, the controller 13 activates the alarm 14 to give an alarm through the first alarm unit 141, and if the second infrared receiver 10 receives infrared rays, the controller 13 activates the alarm 14 to give an alarm through the second alarm unit 142. That is, if the iron core 6 does not normally ascend or descend, an alarm is issued through the first warning unit 141, and if the main contacts (including the movable contact 7 and the fixed contact 11) are not normally turned on or off, an alarm is issued through the second warning unit 142. Therefore, as long as the related personnel observe the warning effect of the first warning unit 141 (no matter whether the second warning unit 142 gives an alarm or not), it indicates that the iron core 6 is not working normally; as long as the related personnel observe the warning effect of the second warning unit 142 and the first warning unit 141 does not give an alarm, it indicates that the main contact and the high-voltage circuit in which the main contact is located have problems.
In this embodiment, as shown in fig. 1, the first infrared receiver 3 and the second infrared receiver 10 are both disposed outside the housing, a through hole for infrared rays to pass through is formed in a corresponding position on the housing, a transparent glass sheet 9 is fixed in the through hole, and the first infrared receiver 3 and the second infrared receiver 10 are both fixedly connected to the housing through a mounting carrier 12. Locating the infrared receivers outside the housing facilitates their electrical connection to the controller 13; through setting up transparent glass piece 9 can ensure the infrared transmission between infrared emitter and the infrared receiver, can satisfy the sealed requirement of casing simultaneously.
In this embodiment, as shown in fig. 1, the connection push rod 1 is fixedly connected to the lower end of the iron core 6, the housing is divided into an upper cavity and a lower cavity, the movable contact 7 is located in the upper cavity, and the auxiliary movable contact 2 and the auxiliary stationary contact 5 are located in the lower cavity. The main contact and the auxiliary contact (comprising the auxiliary movable contact 2 and the auxiliary fixed contact 5) are arranged in a separated way, so that the mutual influence between the main contact and the auxiliary contact can be avoided, and the reliability of the relay is guaranteed.
Otherwise, the same procedure as in example 1 was repeated.
Example 3
The present embodiment is different from embodiment 2 in that:
in this embodiment, as shown in fig. 3, 5 and 6, the lower end of the housing is detachably connected to a dynamic monitoring mechanism, and the dynamic monitoring mechanism includes a dynamic monitoring circuit provided with a slide rheostat 15 and a link assembly passing through the bottom of the housing and detachably fastened to the iron core 6 and fixedly connected to the slide sheet 18 of the slide rheostat 15. The slip sheet 18 is linked with the iron core 6 through the connecting rod assembly, when the iron core 6 ascends or descends, the slip sheet 18 can be driven to move through the connecting rod assembly, the resistance value of the slip rheostat 15 can be changed, namely, the output current of the dynamic monitoring circuit can be changed, when the relay is detected, a curve graph of the output current of the dynamic monitoring circuit can be obtained through the dynamic monitoring mechanism, the variation of the output current in each unit time can be known through the curve graph, if the variation is abnormal in a certain unit time, the problem of the movement of the iron core 6 in the unit time is solved, the specific position of the problem in the movement range of the iron core 6 can be accurately known, and the problem can be found and solved quickly.
As shown in fig. 3, 5 and 6, a threaded hole 19 is formed in the lower end of the iron core 6, the connecting rod assembly includes a threaded rod 22 in threaded connection with the threaded hole 19, a short lifting column 16 fixedly connected to the lower end of the threaded rod 22, and a connecting rod 17 connected to the lower end of the short lifting column 16, a limit stop 23 located inside the short lifting column 16 is fixed to the upper end of the connecting rod 17, the width of the limit stop 23 is greater than the diameter of the connecting rod 17, and an installation groove for the limit stop 23 to rotate relatively is formed in the short lifting column 16. When the dynamic monitoring mechanism is installed, the screw rod 22 and the lifting stud 16 penetrate through the bottom of the shell and the lifting stud 16 is rotated, so that the screw rod 22 is in threaded connection in the threaded hole 19, in the process of rotating the lifting stud 16, the connecting rod 17 can be kept in non-rotation through the structures of the limit stop 23 and the mounting groove, and then in the lifting process of the iron core 6, the lifting stud 16 and the connecting rod 17 can be lifted and moved along with the screw rod to achieve adjustment of the sliding rheostat 15.
As shown in fig. 4, the bottom of the housing is provided with a through opening 20 just for the lift pin 16 to pass through, and the through opening 20 is provided with a sealing plug 21 enough to close the through opening 20. When the dynamic monitoring mechanism is not required to be installed, the sealing plug 21 can be used for sealing the through hole 20 so as to guarantee the sealing requirement of the shell.
The rest is the same as example 2.
The contact monitoring device of the high-voltage direct-current relay has the following specific action principle:
in the application process of the relay, when the coil is powered on, under the normal condition, the iron core 6 can rise under the action of magnetic force, the moving contact 7 and the connecting push rod 1 are driven to rise, the moving contact 7 can simultaneously abut against the two fixed contacts 11, the two fixed contacts 11 are communicated to switch on a high-voltage circuit where the fixed contacts 11 are located, meanwhile, the second infrared emitter 8 is powered on and can emit infrared rays towards the second infrared receiver 10, the connecting push rod 1 rises and can drive the auxiliary moving contact 2 to abut against the auxiliary fixed contact 5, and the first infrared emitter 4 is powered on and can emit infrared rays towards the first infrared receiver 3.
At this time, if the first warning unit 141 sends a warning (no matter whether the second warning unit 142 sends a warning or not), it indicates that the first infrared receiver 3 does not receive the infrared ray, and indicates that the auxiliary movable contact 2 and the auxiliary stationary contact 5 are not successfully abutted, that is, the iron core 6 is not lifted normally; if the first warning unit 141 does not send a warning, it indicates that the iron core 6 is normally raised, and if the second warning unit 142 sends a warning, the second infrared receiver 10 does not receive infrared rays, which indicates that the two fixed contacts 11 are not connected, which indicates that the main contact and the high-voltage circuit where the main contact is located are abnormal.
When the coil is powered off, under normal conditions, the iron core 6 can descend under the action of magnetic force to drive the moving contact 7 and the connecting push rod 1 to descend, the moving contact 7 can be separated from the two fixed contacts 11 at the same time, so that the two fixed contacts 11 are disconnected to disconnect a high-voltage circuit where the fixed contacts 11 are located, meanwhile, the second infrared emitter 8 is powered off to stop emitting infrared rays, and the connecting push rod 1 descends to drive the auxiliary moving contact 2 to be separated from the auxiliary fixed contact 5, so that the first infrared emitter 4 is powered off to stop emitting infrared rays.
At this time, if the first warning unit 141 sends a warning (no matter whether the second warning unit 142 sends a warning or not), it indicates that the first infrared receiver 3 receives infrared rays, and indicates that the auxiliary movable contact 2 and the auxiliary stationary contact 5 are not successfully separated, that is, the iron core 6 is not normally lowered; if the first warning unit 141 does not issue a warning, it indicates that the iron core 6 is normally lowered, and based on this, if the second warning unit 142 issues a warning, the second infrared receiver 10 receives infrared rays, which indicates that the two fixed contacts 11 are normally disconnected, which indicates that the main contact and the high-voltage circuit where the main contact is located are abnormal.
In short, if the first warning unit 141 issues a warning (no matter whether the second warning unit 142 issues a warning or not), it indicates that there is an abnormality in the movement of the iron core 6; if the second warning unit 142 sends out a warning and the first warning unit 141 does not send out a warning, it indicates that the main contact and the high-voltage circuit where the main contact is located are abnormal.
When carrying out further detection to the relay alone, need install dynamic monitoring mechanism, specifically be: the sealing plug 21 is pulled out, the screw rod 22 and the lifting stud 16 pass through the bottom of the shell and the lifting stud 16 is rotated, so that the screw rod 22 is in threaded connection with the threaded hole 19, in the process of rotating the lifting stud 16, the connecting rod 17 can be kept to be in non-rotation through the structure of the limit stop 23 and the mounting groove, then, when the iron core 6 ascends or descends, the sliding sheet 18 can be driven to move through the connecting rod assembly, the resistance value of the sliding rheostat 15 can be changed, in combination with the graph 6, the resistance value of the sliding rheostat 15 is changed, the output current detected by the output current detector is changed (the voltage is unchanged, the resistance is increased, the output current is reduced, the resistance is reduced, and the output current is increased), when the relay is detected, a graph of the output current of the dynamic monitoring circuit can be obtained through the dynamic monitoring mechanism, and the variation of the output current in each unit time can be known through the graph, if the variation is abnormal in a certain unit time, it indicates that the movement of the iron core 6 in the unit time has a problem, so that the specific position of the problem in the movement range of the iron core 6 can be accurately known, and the problem can be quickly found and solved.
According to the invention, whether the iron core has problems or not can be detected more finely, whether the main contact and the high-voltage circuit where the main contact is located have problems or not can be detected, the relay can be monitored in real time in an application circuit of the relay, and an alarm can be given out in time when the relay has problems.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A contact monitoring device of a high-voltage direct-current relay comprises an iron core (6) arranged in a shell, a moving contact (7) connected to the upper end of the iron core (6), and two static contacts (11) connected to the top of the shell, wherein the moving contact (7) is positioned right below the two static contacts (11); the infrared detection device is characterized in that a transversely arranged connecting push rod (1) is fixedly connected to the iron core (6), an auxiliary moving contact (2) is installed at one end of the upper end face of the connecting push rod (1), an auxiliary fixed contact (5) fixedly connected with a shell is arranged right above the auxiliary moving contact (2), a first infrared transmitter (4) fixedly connected with the shell is arranged beside the auxiliary fixed contact (5), the auxiliary moving contact (2) and the auxiliary fixed contact (5) are connected to an electrifying circuit of the first infrared transmitter (4), and a first infrared receiver (3) used for receiving infrared rays emitted by the first infrared transmitter (4) is arranged right below the first infrared transmitter (4); a second infrared emitter (8) positioned in the middle and conducting strips positioned on two sides and connected with the second infrared emitter (8) are installed on the upper end surface of the moving contact (7), and a second infrared receiver (10) used for receiving infrared rays emitted by the second infrared emitter (8) is arranged right above the second infrared emitter (8);
a controller (13) and an alarm (14) are arranged outside the shell, the first infrared receiver (3) and the second infrared receiver (10) are both in telecommunication connection with the input end of the controller (13), the output end of the controller (13) is in telecommunication connection with the alarm (14), when the relay coil is electrified, if the first infrared receiver (3) and the second infrared receiver (10) both receive infrared rays, the controller (13) does not start the alarm (14) to send an alarm, and if the first infrared receiver (3) and/or the second infrared receiver (10) do not receive infrared rays, the controller (13) starts the alarm (14) to send an alarm; when the relay coil is powered off, if the first infrared receiver (3) and the second infrared receiver (10) do not receive infrared rays, the controller (13) does not start the alarm (14) to send out an alarm, and if the first infrared receiver (3) and/or the second infrared receiver (10) receive the infrared rays, the controller (13) starts the alarm (14) to send out an alarm.
2. The contact monitoring device of the high-voltage direct-current relay according to claim 1, wherein a first warning unit (141) and a second warning unit (142) are arranged in the alarm (14), the warning effects of the first warning unit (141) and the second warning unit (142) are different, when the relay coil is energized, if the first infrared receiver (3) does not receive infrared rays, the controller (13) starts the alarm (14) to send an alarm through the first warning unit (141), and if the second infrared receiver (10) does not receive infrared rays, the controller (13) starts the alarm (14) to send an alarm through the second warning unit (142); when the relay coil is powered off, if the first infrared receiver (3) receives infrared rays, the controller (13) starts the alarm (14) to give an alarm through the first alarm unit (141), and if the second infrared receiver (10) receives infrared rays, the controller (13) starts the alarm (14) to give an alarm through the second alarm unit (142).
3. The contact monitoring device of the high-voltage direct-current relay, according to claim 1, is characterized in that the first infrared receiver (3) and the second infrared receiver (10) are both arranged outside the housing, a through hole for infrared rays to pass through is formed in the corresponding position on the housing, a transparent glass sheet (9) is fixed in the through hole, and the first infrared receiver (3) and the second infrared receiver (10) are both fixedly connected with the housing through a mounting carrier plate (12).
4. The contact monitoring device of the high-voltage direct-current relay according to claim 1, wherein the connecting push rod (1) is fixedly connected to the lower end of the iron core (6), the shell is divided into an upper cavity and a lower cavity, the movable contact (7) is located in the upper cavity, and the auxiliary movable contact (2) and the auxiliary stationary contact (5) are located in the lower cavity.
5. The contact monitoring device for the high-voltage direct-current relay is characterized in that a dynamic monitoring mechanism is detachably connected to the lower end of the shell, and the dynamic monitoring mechanism comprises a dynamic monitoring circuit provided with a sliding rheostat (15) and a connecting rod assembly which penetrates through the bottom of the shell, is detachably and fixedly connected with the iron core (6), and is fixedly connected with a sliding sheet (18) of the sliding rheostat (15).
6. The contact monitoring device of the high-voltage direct current relay is characterized in that a threaded hole (19) is formed in the lower end of the iron core (6), the connecting rod assembly comprises a screw rod (22) in threaded connection with the threaded hole (19), a lifting short column (16) fixedly connected to the lower end of the screw rod (22), and a connecting rod (17) connected to the lower end of the lifting short column (16), a limit stop (23) located inside the lifting short column (16) is fixed to the upper end of the connecting rod (17), the width of the limit stop (23) is larger than the diameter of the connecting rod (17), and an installation groove for relative rotation of the limit stop (23) is formed inside the lifting short column (16).
7. Contact monitoring device of a hvdc relay according to claim 6, characterized in that the bottom of the housing is provided with a through opening (20) just for the passage of the lift stud (16), said through opening (20) being provided with a sealing plug (21) sufficient to close off the through opening (20).
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| CN202110611967.3A CN113539751B (en) | 2021-06-02 | 2021-06-02 | Contact monitoring device of high-voltage direct-current relay |
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| CN113921328A (en) * | 2021-12-01 | 2022-01-11 | 天津平高智能电气有限公司 | High-voltage vacuum relay |
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