CN209947755U - DC contactor with built-in auxiliary circuit - Google Patents

Abstract

The utility model discloses a built-in auxiliary circuit's direct current contactor relates to the contactor, and the staff can't in time discover when aiming at solving current contactor its movable and stationary contact trouble, leads to the maintenance inconvenient, influences work efficiency's problem, and its technical scheme main points are: the contactor comprises a shell, a contactor body arranged in the shell and a coil used for switching on and off the contactor body to convert power, wherein the contactor body comprises a fixed contact, a movable contact and a push rod used for pushing the movable contact to close and separate the fixed contact, a feedback assembly used for outputting feedback information is arranged in the shell, a touch block is fixed on the push rod, and an excitation end of the feedback assembly faces the touch block. The utility model discloses a built-in auxiliary circuit's direct current contactor, it can assist warning staff self trouble to the staff in time maintains the change, improves work efficiency.

Description

DC contactor with built-in auxiliary circuit

Technical Field

The utility model relates to a contactor, more specifically say, it relates to a built-in auxiliary circuit's direct current contactor.

Background

The direct current contactor is a contactor used in a direct current loop, is suitable for a programmable power supply or an uninterruptible power supply system, and is applied to the fields of a plurality of new energy resources such as forklifts, electric automobiles and movable electric charging piles.

During the use, after the contactor coil circular telegram, coil current produced the magnetic field, made quiet iron core produce electromagnetic attraction and attract and move the iron core to drive the push rod and remove, make movable contact and stationary contact: at the moment, the normally closed contact is opened, the normally open contact is closed, and the normally closed contact and the normally open contact are linked. When the coil is powered off, the electromagnetic attraction disappears, and the armature is released under the action of the release spring to restore the static contact: the normally open contact is open and the normally closed contact is closed.

In the use, because the moving contact and the static contact have great current to lead to the high fever through, and both collide the contact after the high fever, so the contactor can take place the condition that the moving contact bonds the static contact after using a period of time, need in time maintain and change, and this condition often is that the staff finds equipment unusual when operating its equipment of using at present, just can investigate gradually and find the contactor unusual, this leads to influencing staff's work efficiency, consequently need provide a new scheme and solve this problem.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a built-in auxiliary circuit's direct current contactor, it can assist warning staff self trouble to staff's in time maintenance is changed, improves work efficiency.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a direct current contactor of built-in auxiliary circuit, includes the casing, sets up the contactor main part in the casing and is used for opening and close the switching for the contactor main part and change out the coil of power, the contactor main part includes static contact, moving contact and is used for propelling movement moving contact to close the push rod of dividing the static contact, be provided with the feedback subassembly that is used for exporting feedback information in the casing, the push rod is fixed with the touch piece, the excitation orientation of feedback subassembly touches the touch piece.

By adopting the technical scheme, the feedback assembly outputs a feedback signal according to the position of the touch block, namely the push rod; the staff can confirm whether unusual according to the position of output feedback signal confirming the push rod, judges whether the sound contact in the contactor main part bonds, confirms the fault point, makes things convenient for the staff in time to do maintenance work.

The utility model discloses further set up to: the contactor main body comprises an arc extinguishing chamber, the static contact and the moving contact are arranged in the arc extinguishing chamber, and the feedback assembly is located outside the arc extinguishing chamber.

Through adopting above-mentioned technical scheme, can utilize the arc-extinguishing cover to do the protection to feedback subassembly, the electric arc that produces when avoiding sound contact to open and shut causes the interference to feedback subassembly.

The utility model discloses further set up to: the touch block is an insulating block.

By adopting the technical scheme, the touch block can be prevented from being interfered by the conduction from the touch block to the feedback assembly.

The utility model discloses further set up to: the feedback assembly comprises a microswitch, a contact of the microswitch is positioned on one side of the touch block facing the fixed contact and on a moving line of the touch block, when the moving contact is abutted against the fixed contact, the touch block triggers the microswitch, and an output line of the microswitch penetrates out of the shell.

By adopting the technical scheme, the utility model outputs the position information of the microswitch by whether the microswitch is triggered by the touch block; staff only need be at micro-gap switch's output line circular telegram and connect the load this moment, or use it as signal input, can in time know the position of touching the piece through the condition of observing complex device with it, perhaps the position of push rod, with the judgement the utility model discloses a whether sound contact is unusual.

The utility model discloses further set up to: the feedback assembly comprises a transmission rod and an inductor, the transmission rod is parallel to the push rod, one end of the transmission rod is fixed on the touch block, the other end of the transmission rod penetrates through the shell to extend outside the shell and is connected with the shell in a sliding mode, and one end, extending out of the shell, of the transmission rod moves towards the induction end of the inductor.

By adopting the technical scheme, the transmission rod and the push rod move synchronously, the sensor senses and outputs the position of the transmission rod, and a worker determines whether the position of the push rod is abnormal or not through the output of the sensor so as to judge whether the movable and static contacts are abnormal or not; compared with the former feedback assembly, the feedback assembly is better not easy to be interfered by electric arc because the inductor is arranged outside the shell, and the feedback assembly is more stable in use.

The utility model discloses further set up to: the inductor is a photoelectric sensor or a proximity switch, and the transmission rod is an insulating rod.

By adopting the technical scheme, the transmission rod basically can not lead out the electric arc, and the inductor is not in contact with the transmission rod, so that the safety of a product can be effectively improved, and the inductor is prevented from being interfered by the electric arc.

The utility model discloses further set up to: the improved pneumatic contactor is characterized in that a sealing barrel with an inner cavity filled with protective gas is arranged in the shell, the contactor body is arranged in the sealing barrel, the transmission rod extends out from the inner cavity of the sealing barrel, an elastic corrugated sleeve is arranged at one end of the sealing barrel, one end of the elastic corrugated sleeve is fixed on the inner wall of the sealing barrel, the other end of the elastic corrugated sleeve is attached to the outer wall of the transmission rod, and one side of the inner wall of the shell fixed by the elastic corrugated sleeve is a junction side of the transmission rod and the.

By adopting the technical scheme, the contactor main body is arranged in the sealing cylinder filled with the protective gas so as to reduce the oxidation influence of the device; because the elastic corrugated sleeve on the transmission rod can be used for closing the gap between the transmission rod and the connecting position of the sealing cylinder, the protection gas leakage caused by the arrangement of the transmission rod can be effectively prevented.

The utility model discloses further set up to: the moving contact slides and is connected in the push rod, and the direction of sliding is the length direction of push rod, the cover is equipped with buffer spring on the push rod, buffer spring one end is fixed in the moving contact and keeps away from the one side of static contact, and the other end is fixed in the push rod.

Through adopting above-mentioned technical scheme, when the moving contact striking static contact, the recoil force that it received can utilize buffer spring to do the absorption shock attenuation to reduce the probability that its striking static contact damaged, make the utility model discloses a life is longer.

To sum up, the utility model discloses following beneficial effect has: be provided with the feedback subassembly in the casing, the output that corresponds can be made according to the position of push rod to the feedback subassembly, and the moving contact comes the propelling movement through the push rod again to whether the staff can confirm the position of push rod through the output of feedback subassembly unusual, with this judgement the utility model discloses a whether sound contact breaks down, thereby makes things convenient for the staff in time to discover the fault point, and does maintenance work.

Drawings

Fig. 1 is an overall longitudinal sectional view of a first embodiment of the present invention;

fig. 2 is a schematic longitudinal sectional view of the sealing cartridge of the present invention;

FIG. 3 is a longitudinal sectional view of the case of the present invention;

fig. 4 is a longitudinal sectional view of the contactor body according to the present invention;

fig. 5 is an overall longitudinal sectional view of a second embodiment of the present invention.

In the figure: 1. a housing; 11. a box body; 111. a slot; 12. a top cover; 2. a contactor body; 21. static contact; 22. a moving contact; 23. a push rod; 231. a buffer spring; 24. an arc extinguishing chamber; 25. a stationary iron core; 26. a movable iron core; 27. a magnetic conductive ring; 28. a return spring; 3. a coil; 31. inserting a block; 4. a sealing cylinder; 41. a barrel; 411. a main cylinder; 412. a positioning cylinder; 42. a sealing cover; 43. an air intake duct; 431. a pipe cap; 50. a touch block; 51. a microswitch; 52. a transmission rod; 521. an elastic corrugated sleeve; 53. an inductor.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Example one

The dc contactor with an auxiliary circuit built therein, referring to fig. 1 and 4, includes a housing 1, a contactor body 2 disposed in the housing 1, and a coil 3 for turning on and off the contactor body 2 to convert power.

The housing 1 is made of an insulating material, such as plastic, and includes a box 11 having an open structure at one end (as shown in the figure), and a top cover 12 fixed to the open end of the box 11 by bolts.

Referring to fig. 1 and 2, a sealing barrel 4 is clamped in the inner cavity of the box body 11, the sealing barrel 4 includes a barrel body 41 and a sealing cover 42, one side of the inner cavity of the barrel body 41 facing the top cover 12 is in an open structure, and the sealing cover 42 is fixed at the opening of the inner cavity of the barrel body 41 through a sealing glue cover, so as to realize sealing. The contactor body 2 is placed in the inner cavity of the cylinder 41 and the coil 3 is located outside the sealing cylinder 4.

Referring to fig. 1 and 2, in order to optimize the present invention, inert gas is filled in the sealing cylinder 4 to protect the contactor main body 2, so as to reduce the oxidation problem of the device. In order to fill the sealing cylinder 4 with shielding gas conveniently, an air inlet pipeline 43 for communicating the inner cavity of the sealing cylinder 4 with the outside is inserted on the sealing cylinder 4. The air inlet duct 43 is vertically fixed to the sealing cover 42 to prevent it from interfering with the placement of the cartridge 4 in the box body 11. A pipeline cap 431 which is fitted with the air inlet port of the air inlet pipeline 43 is sleeved and sealed by sealant so as to prevent air leakage.

The cylinder 41 comprises a main cylinder 411 and a positioning cylinder 412 which are concentric with each other and have inner cavities communicated with each other, the positioning cylinder 412 is positioned on one side of the main cylinder 411, which is far away from the top cover 12, and the diameter of the positioning cylinder is smaller than that of the main cylinder 411; the coil 3 is sleeved outside the positioning tube 412; the moving and static iron cores of the contactor body 2 are arranged in the positioning cylinder 412, so that the utilization rate of the magnetic field generated by the coil 3 is improved, and the fixation of the coil 3 is assisted.

Referring to fig. 1 and 4, the contactor main body 2 includes a stationary iron core 25 and a movable iron core 26, wherein the lower end of the stationary iron core 25 is clamped to the upper end of the inner cavity of the positioning cylinder 412, and the upper end thereof extends out of the positioning cylinder 412 and transversely extends along the bottom surface of the inner cavity of the main cylinder 411; the movable iron core 26 is vertically connected with the positioning cylinder 412 in a sliding manner. When the coil 3 is electrified, a magnetic field is generated, the iron core is magnetized, the static iron core 25 does not move at the moment, and the movable iron core 26 is attracted by the static iron core 25.

A return spring 28 is provided between the stationary core 25 and the movable core 26. The opposite sides of the static iron core 25 and the movable iron core 26 are provided with limiting grooves with opposite opening structures, and the two ends of the return spring 28 are respectively clamped in the two limiting grooves to realize positioning and fixing.

Contactor main part 2 still includes push rod 23, and push rod 23 extends along quiet iron core 25 and the distribution direction who moves iron core 26, and its one end is fixed in moving iron core 26, and the other end extends quiet iron core 25, and is the connection that slides with quiet iron core 25. The upper end of the push rod 23 is connected with a movable contact 22, and a fixed contact 21 is fixed above the movable contact 22. The static contact 21 is divided into two sub-contacts, which are respectively fixed through the conductive rod passing through the sealing cover 42 and the top cover 12.

When the device is used, the coil 3 is electrified to generate a magnetic field, the movable iron core 26 is utilized to drive the push rod 23 to move upwards, and the push rod 23 moves to drive the movable contact 22 to move towards and abut against the fixed contact 21 so as to realize contact closure; when the coil 3 is de-energized, the two contacts separate under the action of the return spring 28.

Referring to fig. 1, in order to further improve the magnetic field utilization rate of the coil 3, a magnetic conductive ring 27 is disposed between the bottom surface of the positioning cylinder 412 and the bottom surface of the inner cavity of the box body 11, and the magnetic conductive ring 27 is made of iron alloy, which can be used for magnetic conduction, reduce the lost and wasted magnetic flux, improve the main magnetic flux, and ensure the use effect of the iron core. The magnetic ring 27 is C-shaped for easy processing, because the C-shaped magnetic ring 27 can be formed by first being processed into a sheet shape and then being bent.

Referring to fig. 1 and 3, a slot 111 is formed in the bottom surface of the inner cavity of the box body 11, and one side of the slot 111 facing the coil 3 is in an open structure; the coil 3 is composed of a bobbin (bobbin) and a wire wound around the coil 3, and an insertion block 31 fitted into the insertion groove 111 is formed on the bobbin of the coil 3. After the coil 3 is placed in the inner cavity of the box body 11, the insert block 31 is inserted into the slot 111, so as to fix the coil 3 and prevent the coil from moving transversely.

The utility model discloses still make following setting to make things convenient for the staff in time to discover, confirm the fault point, and accomplish maintenance work: referring to fig. 1 and 4, a feedback assembly is disposed in the sealing cylinder 4, a contact block 50 is fixed on the push rod 23, and the contact block 50 is located on a side of the movable contact 22 away from the stationary contact 21; the triggering end of the feedback component faces the touch block 50, and the feedback component can feedback and output the position information of the touch block 50, namely the position information of the push rod 23, so that a worker can judge whether the position of the push rod 23 is abnormal or not, namely judge whether the function of the contactor main body 2 is abnormal or not. Whether the position of the push rod 23 is abnormal or not is detected because the movable and fixed contacts are bonded in the using process.

In order to prevent the feedback component from being interfered by the arc generated by the opening and closing of the contactor, an arc extinguishing chamber 24 is arranged in the cylinder 41, and the arc extinguishing chamber 24 can be made of arc-resistant ceramics and is fixed on the transverse extending part of the static iron core 25. The touch block 50 is made of an insulating material, one end of the touch block is fixed to the push rod 23, the other end of the touch block extends out of the arc-extinguishing chamber 24, and an opening for the touch block 50 to move along with the push rod 23 is formed in the arc-extinguishing chamber 24. The feedback assembly is disposed outside the arc chute 24 so as to prevent interference from the arc as much as possible.

Referring to figure 1, the feedback assembly comprises a microswitch 51, the microswitch 51 being fixed to the outer wall of the arc chute 24 with its trigger end facing downwards (as set forth in the figure); the touch block 50 is located below the micro switch 51.

When the push rod 23 moves upwards to drive the movable contact 22 to abut against the fixed contact 21, the contact block 50 abuts against and triggers the microswitch 51; the output lead of the microswitch 51 passes through the shell 1 to be connected to an electronic device, such as a buzzer, which can prompt a worker. When the static contact 21 and the movable contact 22 are bonded due to high temperature, collision force, frequency and other reasons, the micro switch 51 is kept triggered, and the prompting device connected with the micro switch continuously gives a prompt to a worker, so that the worker can find the fault in time and judge the fault of the contactor main body 2, maintenance work is facilitated, and working efficiency is improved.

Referring to fig. 1, the movable contact 22 is further configured to be slidably connected to the push rod 23 along a length direction of the push rod 23; a through hole for the push rod 23 to slide and pass through relative to the static contact 21 is formed in the static contact; the push rod 23 is sleeved with a buffer spring 231, one end of the buffer spring 231 is fixed on the contact block 50, and the other end is fixed on one side of the movable contact 22 far away from the fixed contact 21. When the moving contact 22 moves towards one side of the static contact 21 and collides, the buffer spring 231 can be used for buffering and damping to reduce the hard acting force, so that the moving contact 22 is better and is not easy to adhere to the static contact 21, the service life of a product is prolonged, the maintenance period is shortened, and the use of workers is facilitated.

Example two

The dc contactor with built-in auxiliary circuit, referring to fig. 5, differs from the first embodiment in that: referring to the figures, the feedback assembly includes a drive rod 52 and a sensor 53.

The drive link 52 is parallel to the push rod 23 and has one end fixed to the trigger block 50 and the other end extending through the seal cap 42 and out through the top cover 12. The sensor 53 may alternatively be a photoelectric sensor or a proximity switch, the probe of which is mounted fixed to the forward portion of the drive link 52 in the direction of extension in use.

The sensor 53 senses the position of the transmission rod 52 relative to the probe thereof and outputs a feedback signal to allow a worker to judge the position of the push rod 23, i.e., the movable contact 22, thereby facilitating the worker to judge whether the function of the contactor body 2 is abnormal.

Because the sealing barrel 4 is filled with the shielding gas, in order to prevent the sliding of the transmission rod 52 from affecting the sealing performance of the sealing barrel 4, an elastic corrugated sleeve 521 is sleeved on a section of the transmission rod 52 arranged in the sealing barrel 4, one end of the elastic corrugated sleeve 521 is attached and fixed to the outer wall of the transmission rod 52, and the other end of the elastic corrugated sleeve 521 is fixed on the sealing cover 42 of the sealing barrel 4, so that the junction of the transmission rod 52 and the sealing cover 42 is sealed and closed, and gas leakage is prevented.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The utility model provides a built-in auxiliary circuit's direct current contactor, includes casing (1), sets up contactor main part (2) in casing (1) and is used for opening and close switching for contactor main part (2) and changes coil (3) of going out power, contactor main part (2) include static contact (21), moving contact (22) and are used for propelling movement moving contact (22) to close push rod (23) of dividing static contact (21), its characterized in that: the novel electronic scale is characterized in that a feedback assembly used for outputting feedback information is arranged in the shell (1), the push rod (23) is fixed with a touch block (50), and the excitation end of the feedback assembly faces the touch block (50).

2. The dc contactor with built-in auxiliary circuit according to claim 1, wherein: the contactor main body (2) comprises an arc extinguishing cover (24), the static contact (21) and the moving contact (22) are arranged in the arc extinguishing cover (24), and the feedback assembly is located outside the arc extinguishing cover (24).

3. The dc contactor with built-in auxiliary circuit according to claim 2, wherein: the touch block (50) is an insulating block.

4. The dc contactor with built-in auxiliary circuit according to claim 3, wherein: the feedback assembly comprises a microswitch (51), a contact of the microswitch (51) is positioned on one side, facing the static contact (21), of the touch block (50) and is positioned on a moving line of the touch block (50), when the movable contact (22) is abutted to the static contact (21), the touch block (50) triggers the microswitch (51), and an output line of the microswitch (51) penetrates out of the shell (1).

5. The dc contactor with built-in auxiliary circuit according to claim 3, wherein: the feedback assembly comprises a transmission rod (52) and a sensor (53), the transmission rod (52) is parallel to the push rod (23), one end of the transmission rod is fixed on the touch block (50), the other end of the transmission rod penetrates through the shell (1) to extend outside and is connected with the shell (1) in a sliding mode, and one end, extending out of the shell (1), of the transmission rod (52) moves towards the sensing end of the sensor (53).

6. The dc contactor with built-in auxiliary circuit according to claim 5, wherein: the sensor (53) is a photoelectric sensor or a proximity switch, and the transmission rod (52) is an insulating rod.

7. The dc contactor with built-in auxiliary circuit according to claim 6, wherein: be provided with sealed section of thick bamboo (4) that the inner chamber filled the protection gas in casing (1), contactor main part (2) set up in sealed section of thick bamboo (4), transfer line (52) stretch out from sealed section of thick bamboo (4) inner chamber, and its one end cover of arranging sealed section of thick bamboo (4) in is equipped with elasticity ripple cover (521), the inner wall of a sealed section of thick bamboo (4) is fixed in to elasticity ripple cover (521) one end, and the outer wall of transfer line (52) is fixed in the laminating of the other end, one side of the fixed casing (1) inner wall of elasticity ripple cover (521) is the juncture side of transfer line (52) and a sealed section of thick bamboo (4.

8. The dc contactor with built-in auxiliary circuit according to claim 1, wherein: the moving contact (22) slides and is connected to the push rod (23), the sliding direction is the length direction of the push rod (23), the push rod (23) is sleeved with a buffer spring (231), one end of the buffer spring (231) is fixed on one side, away from the static contact (21), of the moving contact (22), and the other end of the buffer spring is fixed on the push rod (23).

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