Relay with self-detection function

Abstract

The utility model discloses a relay with a self-detection function, which relates to the technical field of relays and comprises a relay body, a lead terminal is arranged on the surface of the relay body and is electrically connected with a high-voltage power supply, a fixing part is fixedly connected in the relay body, a lower contact is fixedly connected on the surface of the fixing part, and the lower contact is electrically connected with the lead terminal. The bottom wall of the inner cavity of the relay body is fixedly connected with a fixing rod, the top end of the fixing plate is rotatably connected with an armature, the lower surface of the armature is fixedly connected with an upper contact, the bottom wall of the inner cavity of the relay body is fixedly connected with a reset spring, the top end of the reset spring is fixedly connected with one end of the armature, and the bottom wall of the inner cavity of the relay body is provided with a transmission mechanism for disconnecting the contact; according to the utility model, the transmission mechanism drives the armature to move, and the armature moves to drive the upper contact to move, so that the contact is disconnected, forced power-off is realized, self-detection of self temperature can be realized, forced circuit breaking is realized according to the temperature, fault arcs are avoided, and the operation safety of the relay is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay with a self-detection function. Background Art

[0002] The principle of the relay is to use the rated voltage in the coil to generate electromagnetic force, control the upper and lower contacts to close and open. Its function is to increase the normally open and normally closed contacts as switches and current amplification. It is usually used in conjunction with contactors, frequency converters, PLCs, etc., generally through the normally open and normally closed of the relay to control the coil of the contactor and increase the auxiliary contacts, increase the contacts inside the PLC output, and the auxiliary terminals of the frequency converter to connect the signal. In electrical equipment, when a certain period of time is reached, the line will age, and dangerous arcs will be generated on these aged lines. The characteristics of the fault arc are high temperature and short duration. Once a breakdown point appears, a carbonization path will be formed and appear frequently, and the fault will expand rapidly until the nearby combustibles are ignited and cause a fire. Generally, relays designed to prevent circuit leakage and overcurrent cannot detect arc faults, making arc faults the biggest hidden danger to safe electricity use.

[0003] After searching, it was found that the Chinese patent with the announcement number CN220627699U disclosed a relay, including: a shell, provided with a receiving cavity and an opening; a bottom plate, arranged at the opening, the bottom plate having a first surface and a second surface, the first surface facing the receiving cavity, and the second surface facing away from the receiving cavity; a circuit control body, arranged in the receiving cavity, including a skeleton, a coil and a square wire, the coil is wound on the skeleton, the square wire is connected to the skeleton and connected to the coil, and the square wire is passed through the bottom plate; a lead-out terminal is connected to the second surface of the bottom plate and connected to the square wire. The relay in the utility model installs the lead-out terminal on the bottom plate, and the square wire is connected to the lead-out terminal after passing through the bottom plate. In this way, the installation and fixation of the lead-out terminal is realized, and the connection between the lead-out terminal and the square wire is also realized, avoiding the need to set a mounting plate for mounting the lead-out terminal on the skeleton of the coil, saving the installation space inside the shell, and facilitating the winding and installation of the coil on the skeleton.

[0004] The above utility model has the following problems:

[0005] The lack of self-detection function means that when a fault arc occurs, the circuit cannot be effectively disconnected, causing the temperature of the electromagnetic relay to rise rapidly, a breakdown point to appear, a carbonization path to form and appear frequently, and the fault to expand rapidly until it ignites nearby combustible materials and causes a fire.

[0006] Therefore, those skilled in the art provide a relay with a self-detection function to solve the problems raised in the above background technology. Utility Model Content

[0007] The purpose of the utility model is to provide a relay with a self-detection function to solve the problems raised in the above background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A relay with a self-detection function comprises a relay body, wherein a lead terminal is arranged on the surface of the relay body, the lead terminal is electrically connected to a high voltage power supply, a fixing piece is fixedly connected inside the relay body, a lower contact is fixedly connected on the surface of the fixing piece, the lower contact is electrically connected to the lead terminal, a fixing rod is fixedly connected to the bottom wall of an inner cavity of the relay body, an armature is rotatably connected to the top of a fixing plate, an upper contact is fixedly connected to the lower surface of the armature, a reset spring is fixedly connected to the bottom wall of the inner cavity of the relay body, the top of the reset spring is fixedly connected to one end of the armature, and a transmission mechanism for disconnecting the contacts is arranged on the bottom wall of the inner cavity of the relay body.

[0010] As a further solution of the utility model: the bottom wall of the inner cavity of the relay body is also fixedly connected with an iron core, and the surface of the iron core is wound with an electromagnetic coil.

[0011] As a further solution of the utility model: a switch is fixedly connected inside the relay body, and the electromagnetic coil is electrically connected to an external power supply through the switch.

[0012] As a further solution of the utility model: the transmission mechanism includes a sleeve rod, a limit groove, a limit block, a movable rod, a threaded rod, an abutment joint, a first bevel gear, a transmission rod and a second bevel gear. The sleeve rod is fixedly connected to the bottom wall of the inner cavity of the relay body, and a limit groove is arranged inside the sleeve rod. The inner side wall of the limit groove is slidably connected to the limit block. The side wall of the limit block is fixedly connected to the movable rod, the top end of the movable rod is fixedly connected to the abutment joint, the lower surface of the armature is fixedly connected to the abutment part, and the abutment joint abuts the abutment part when it moves.

[0013] As a further solution of the utility model: a threaded inner cavity is provided inside the movable rod, a threaded rod is threadedly connected to the threaded inner cavity, and a first bevel gear is fixedly connected to the bottom end of the threaded rod.

[0014] As a further solution of the utility model: the inner side wall of the sleeve rod is rotatably connected with a transmission rod, one end of the transmission rod is fixedly connected with a second bevel gear, and the second bevel gear is meshed and connected with the first bevel gear.

[0015] As a further solution of the utility model: the side wall of the sleeve rod is fixedly connected with a driving motor, and the power output end of the driving motor is fixedly connected to one end of the transmission rod.

[0016] As a further solution of the utility model: a temperature sensor and a single-chip microcomputer are fixedly connected to the top wall of the inner cavity of the relay body, a signal output end of the temperature sensor is connected to a signal input end of the single-chip microcomputer, and the temperature sensor and the drive motor are electrically connected to an external power supply through the single-chip microcomputer.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The iron core is located in the middle of the electromagnetic coil, and is mainly used to concentrate and enhance the magnetic field generated by the electromagnetic coil. Through the iron core, the relay body can achieve higher sensitivity and response speed, because the iron core can make the electromagnetic induction more concentrated and improve efficiency. The electromagnetic coil is energized by the switch control. When the current passes through the electromagnetic coil, a magnetic field is generated, thereby adsorbing the armature. The movement of the armature drives the upper contact to move, and the upper contact moves and abuts against the lower contact to achieve the connection of the contact. The lead terminal is energized by the connection of the contact, that is, the high-voltage power supply is turned on and off, which can effectively avoid direct contact with large currents. The reset spring is mainly used to control the movement of the contact. When the electromagnetic coil is energized, the contact is closed due to the electromagnetic attraction, and when the electromagnetic coil is de-energized, the reset spring will quickly separate the contact and restore it to its initial state, which ensures that the relay can respond quickly and maintain stability when the control signal changes; The temperature sensor can detect its own temperature in real time and transmit it to the single-chip microcomputer. When the temperature exceeds the set threshold, the single-chip microcomputer controls the operation of the drive motor. The power output end of the drive motor rotates to drive the transmission rod, and the transmission rod rotates to drive the second bevel gear. The second bevel gear rotates to drive the first bevel gear. The first bevel gear rotates to drive the threaded rod. The threaded rod rotates to drive the movable rod to move under the action of the threaded inner cavity. The movable rod can only move axially in the limit groove and the limit block. The movement of the movable rod drives the movement of the abutment head, the movement of the abutment head drives the movement of the abutment part, the movement of the abutment part drives the movement of the armature, and the movement of the armature drives the movement of the upper contact, thereby disconnecting the contacts and realizing forced power off. It can self-detect its own temperature and force circuit breaking according to the temperature to avoid the occurrence of fault arcs and ensure the safety of relay operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a schematic diagram of the structure of a relay with a self-detection function.

[0020] Figure 2 The figure is a schematic diagram of the internal structure of a relay body in a relay with a self-detection function.

[0021] Figure 3 A relay with self-detection function Figure 2 Enlarged view of point A in the middle.

[0022] Figure 4 The figure is a structural block diagram of the operation of a relay with self-detection function.

[0023] In the figure: 1. relay body; 2. lead terminal; 3. fixing piece; 4. lower contact; 5. fixing rod; 6. armature; 7. upper contact; 8. reset spring; 9. iron core; 10. electromagnetic coil; 11. switch; 12. temperature sensor; 13. single chip microcomputer; 14. abutment; 15. sleeve rod; 16. limit groove; 17. limit block; 18. movable rod; 19. threaded rod; 20. abutment head; 21. first bevel gear; 22. transmission rod; 23. second bevel gear; 24. drive motor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] Reference Figure 1-2The embodiment provides a relay with a self-detection function, including a relay body 1, a lead terminal 2 is arranged on the surface of the relay body 1, the lead terminal 2 is electrically connected to a high-voltage power supply, a fixing member 3 is fixedly connected inside the relay body 1, a lower contact 4 is fixedly connected on the surface of the fixing member 3, the lower contact 4 is electrically connected to the lead terminal 2, a fixing rod 5 is fixedly connected to the bottom wall of the inner cavity of the relay body 1, an armature 6 is rotatably connected to the top of the fixing plate, an upper contact 7 is fixedly connected to the lower surface of the armature 6, a reset spring 8 is fixedly connected to the bottom wall of the inner cavity of the relay body 1, the top of the reset spring 8 is fixedly connected to one end of the armature 6, a transmission mechanism for disconnecting the contacts is arranged on the bottom wall of the inner cavity of the relay body 1, an iron core 9 is also fixedly connected to the bottom wall of the inner cavity of the relay body 1, an electromagnetic coil 10 is wound on the surface of the iron core 9, a switch 11 is also fixedly connected inside the relay body 1, and the electromagnetic coil 10 is electrically connected to an external power supply through the switch 11; the iron core 9 is located at the electromagnetic wire The middle of the ring 10 is mainly used to concentrate and enhance the magnetic field generated by the electromagnetic coil 10. Through the iron core 9, the relay body 1 can achieve higher sensitivity and response speed, because the iron core 9 can make the electromagnetic induction more concentrated and improve efficiency. The electromagnetic coil 10 is energized through the switch 11. When the current passes through the electromagnetic coil 10, a magnetic field is generated, thereby adsorbing the armature 6. The movement of the armature 6 drives the upper contact 7 to move. The upper contact 7 moves and abuts against the lower contact 4 to achieve the connection of the contacts. The lead terminal 2 is energized through the connection of the contacts, that is, the high-voltage power supply is turned on and off, which can effectively avoid direct contact with large currents. The reset spring 8 is mainly used to control the movement of the contacts. When the electromagnetic coil 10 is energized, the contacts are closed due to the electromagnetic attraction. When the electromagnetic coil 10 is de-energized, the reset spring 8 will quickly separate the contacts to restore them to their initial state, which ensures that the relay can respond quickly and maintain stability when the control signal changes.

[0027] Example 2

[0028] Reference Figure 1-4This embodiment is based on the previous embodiment, and is different from the previous embodiment in that the transmission mechanism includes a sleeve rod 15, a limit groove 16, a limit block 17, a movable rod 18, a threaded rod 19, an abutment joint 20, a first bevel gear 21, a transmission rod 22 and a second bevel gear 23. The sleeve rod 15 is fixedly connected to the bottom wall of the inner cavity of the relay body 1. The sleeve rod 15 is provided with a limit groove 16 inside. The inner side wall of the limit groove 16 is slidably connected to the limit block 17. The side wall of the limit block 17 is fixedly connected to the movable rod 18. The top of the movable rod 18 is fixedly connected to the abutment joint 20. The lower surface of the armature 6 is fixedly connected to the There is an abutment 14, and the abutment head 20 abuts against the abutment 14 when it moves. A threaded inner cavity is provided inside the movable rod 18, and a threaded rod 19 is threadedly connected to the threaded inner cavity. The bottom end of the threaded rod 19 is fixedly connected to a first bevel gear 21. The inner wall of the sleeve rod 15 is rotatably connected to a transmission rod 22, and one end of the transmission rod 22 is fixedly connected to a second bevel gear 23. The second bevel gear 23 is meshed and connected with the first bevel gear 21. The side wall of the sleeve rod 15 is fixedly connected to a drive motor 24, and the power output end of the drive motor 24 is fixedly connected to one end of the transmission rod 22. The top wall of the inner cavity of the relay body 1 is fixedly connected to a temperature The temperature sensor 12 and the single-chip microcomputer 13, the signal output end of the temperature sensor 12 is connected to the signal input end of the single-chip microcomputer 13, the temperature sensor 12 and the drive motor 24 are electrically connected to the external power supply through the single-chip microcomputer 13; the temperature sensor 12 can detect its own temperature in real time and transmit it to the single-chip microcomputer 13. When the temperature exceeds the set threshold, the single-chip microcomputer 13 controls the drive motor 24 to operate, the power output end of the drive motor 24 rotates to drive the transmission rod 22 to rotate, the transmission rod 22 rotates to drive the second bevel gear 23 to rotate, the second bevel gear 23 rotates to drive the first bevel gear 21 to rotate, and the first bevel gear The rotation of the wheel 21 drives the threaded rod 19 to rotate. The rotation of the threaded rod 19 drives the movable rod 18 to move under the action of the threaded inner cavity. The movable rod 18 can only move axially due to the limitation of the limit groove 16 and the limit block 17. The movement of the movable rod 18 drives the movement of the abutment head 20. The movement of the abutment head 20 drives the movement of the abutment member 14. The movement of the abutment member 14 drives the movement of the armature 6. The movement of the armature 6 drives the upper contact 7 to move, thereby disconnecting the contacts and realizing forced power off. It can self-detect its own temperature and force circuit breaking according to the temperature to avoid the occurrence of fault arcs and ensure the safety of relay operation.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A relay with a self-detection function, characterized in that: The invention comprises a relay body (1), wherein a lead terminal (2) is arranged on the surface of the relay body (1), the lead terminal (2) is electrically connected to a high voltage power supply, a fixing member (3) is fixedly connected inside the relay body (1), a lower contact (4) is fixedly connected to the surface of the fixing member (3), the lower contact (4) is electrically connected to the lead terminal (2), a fixing rod (5) is fixedly connected to the bottom wall of the inner cavity of the relay body (1), an armature (6) is rotatably connected to the top of the fixing plate, an upper contact (7) is fixedly connected to the lower surface of the armature (6), a reset spring (8) is fixedly connected to the bottom wall of the inner cavity of the relay body (1), the top of the reset spring (8) is fixedly connected to one end of the armature (6), and a transmission mechanism for disconnecting the contacts is arranged on the bottom wall of the inner cavity of the relay body (1).

2. A relay with self-detection function according to claim 1, characterized in that: An iron core (9) is also fixedly connected to the bottom wall of the inner cavity of the relay body (1), and an electromagnetic coil (10) is wound around the surface of the iron core (9).

3. A relay with self-detection function according to claim 1, characterized in that: A switch (11) is also fixedly connected inside the relay body (1), and the electromagnetic coil (10) is electrically connected to an external power source via the switch (11).

4. A relay with self-detection function according to claim 1, characterized in that: The transmission mechanism comprises a sleeve rod (15), a limit groove (16), a limit block (17), a movable rod (18), a threaded rod (19), an abutment joint (20), a first bevel gear (21), a transmission rod (22) and a second bevel gear (23); the sleeve rod (15) is fixedly connected to the bottom wall of the inner cavity of the relay body (1); a limit groove (16) is provided inside the sleeve rod (15); the inner side wall of the limit groove (16) is slidably connected to the limit block (17); the side wall of the limit block (17) is fixedly connected to the movable rod (18); the top end of the movable rod (18) is fixedly connected to the abutment joint (20); the lower surface of the armature (6) is fixedly connected to the abutment member (14); and the abutment joint (20) abuts against the abutment member (14) when moving.

5. A relay with self-detection function according to claim 4, characterized in that: A threaded inner cavity is provided inside the movable rod (18), a threaded rod (19) is threadedly connected to the threaded inner cavity, and a first bevel gear (21) is fixedly connected to the bottom end of the threaded rod (19).

6. A relay with self-detection function according to claim 4, characterized in that: The inner side wall of the sleeve rod (15) is rotatably connected to a transmission rod (22), one end of the transmission rod (22) is fixedly connected to a second bevel gear (23), and the second bevel gear (23) is meshingly connected to the first bevel gear (21).

7. A relay with self-detection function according to claim 4, characterized in that: A drive motor (24) is fixedly connected to the side wall of the sleeve rod (15), and a power output end of the drive motor (24) is fixedly connected to one end of the transmission rod (22).

8. A relay with self-detection function according to claim 1, characterized in that: A temperature sensor (12) and a single-chip microcomputer (13) are fixedly connected to the top wall of the inner cavity of the relay body (1), a signal output end of the temperature sensor (12) is connected to a signal input end of the single-chip microcomputer (13), and the temperature sensor (12) and the drive motor (24) are electrically connected to an external power supply via the single-chip microcomputer (13).

Images