CN114038694B - Energy-saving conversion device of switch electric appliance - Google Patents

Abstract

The invention discloses an energy-saving conversion device for a switch electrical appliance, which comprises a mounting plate, and a limit cam is assembled in the mounting plate through a limit shaft. The front part of the side sliding guide rod is installed inside the auxiliary switch of the common side, the second curved surface is in conflict with the tail end of the backup side sliding guide rod, and the front part of the backup side sliding guide rod is installed inside the backup side auxiliary switch; the first One side of the curved surface is connected with the front end of the moving iron core through the driving connecting rod. The moving iron core is installed in the magnetic system. Switching of working position of side auxiliary switch and spare side auxiliary switch. The invention adopts a magnetic system to realize the switching requirements of the normal power supply and the backup power supply of the automatic transfer switch, requires few parts, greatly reduces the production cost of the product, increases the reliability and safety of the product, and is energy-saving and environment-friendly.

Description

Energy-saving conversion device for switching appliances

technical field

The invention relates to the technical field of switching electrical equipment, in particular to an energy-saving switching device for switching electrical appliances, which uses a set of magnetic systems to realize the switching of multiple positions of an automatic switching switch.

Background technique

With the development of social economy, switching appliances are widely used in power distribution systems in construction, fire protection, communications, hospitals, finance, airports, subways, military, data centers and other fields, as a conversion between two power sources to ensure that important loads Uninterrupted power supply or allow short-term power outages for maintenance, debugging, and overhaul. This requires the product to be very convenient and safe for maintenance, debugging, and overhaul to ensure the continuity of power consumption and the life safety of equipment maintenance personnel. The original transfer switch uses two sets of magnetic system structures to control the two sets of contacts of the switch respectively. The switch body is large in size, uses a lot of materials, consumes a lot of energy, and has low reliability. Problems such as inaccurate switch output will cause the controller to burn out or the switch to malfunction, reducing the quality of power consumption.

Contents of the invention

The purpose of the present invention is to provide an energy-saving switching device for switching appliances, which uses a set of magnetic systems to realize fast and accurate switching of multiple positions of an automatic switch, avoids the overlapping of two power sources, and improves the reliability of switching equipment.

In order to achieve the above object, the technical scheme adopted in the present invention is:

An energy-saving conversion device for switching electrical appliances, comprising a stamped mounting plate, the mounting plate includes a front vertical plate, a left wing plate and a right wing plate perpendicular to the front vertical plate, a limiting axis runs through the left wing plate, the limiting The shaft center of the position cam and the right wing plate. The limit cam is located in the middle of the left wing plate and the right wing plate. The limit cam includes a first curved surface and a second curved surface. The first curved surface is installed at the tail of the auxiliary switch on the common side. The tail end of the normal side sliding guide rod is in conflict with the normal side sliding guide rod. The front part of the normal side sliding guide rod is installed inside the side wall of the normal side auxiliary switch, and a return spring is installed at the joint; The tail end of the sliding guide rod on the standby side is in conflict with each other, and the front part of the sliding guide rod on the standby side is installed inside the side wall of the auxiliary switch on the standby side, and a return spring is installed at the joint; Installed on the front end of the left wing plate; one side of the first curved surface is connected with the front end of the moving iron core through the drive link, and the rear end of the moving iron core passes through the positioning hole in the center of the front vertical plate and extends to the outside of the mounting plate. The moving iron core, the driving link and the limit cam form a transmission link mechanism. The moving iron core is installed in the magnetic system, which is connected with the remote control system. The moving iron core is attracted or disconnected under the action of magnetic force in the magnetic system. Drive the limit cam to rotate, and then drive the first curved surface to move relative to the sliding guide rod on the common side, and the second curved surface to move relative to the sliding guide rod on the spare side, so as to realize the conversion of the working position of the auxiliary switch on the common side and the auxiliary switch on the spare side.

Preferably, the shape of the first curved surface is the same as that of the second curved surface, both of which include three arc-shaped surfaces connected end to end, and the first curved surface and the second curved surface are relatively rotated by 30-35° with the axis of the limit cam as the rotation point Afterwards, the respective three arc-shaped surfaces are mutually misplaced and arranged.

Preferably, a connecting rod mounting hole is opened on one side of the first curved surface, and one end of the short rod at the front end of the driving connecting rod passes through the rear end of the connecting rod mounting hole and is fixed with a retaining ring, and one end of the short rod at the rear end of the driving connecting rod It is installed in the connection hole at the front end of the moving iron core.

Preferably, the other end of the short rod at the front end and the other end of the short rod at the rear end of the drive link are smoothly connected by a cross bar.

In the present invention, the limit cam enables the automatic transfer switch to have three important switch status positions:

The first switch state position: it is the position where the limit cam rotates right to the bottom. This position is the power supply position of the common power supply side of the automatic transfer switch, that is, the first curved surface on the limit cam is provided to the control system after cooperating with the auxiliary switch on the common side. The output signal is the normal side closing signal, so as to ensure that the transfer switch is switched to the normal power side for normal operation;

The second switch state position: it is the position where the limit cam turns left to the bottom, which is the power supply position on the backup power side of the automatic transfer switch, that is, the second curved surface on the limit cam is provided to the control system after cooperating with the auxiliary switch on the backup side. The output signal is the closing signal of the standby power supply side, so as to ensure that the transfer switch switches to the standby power supply side for normal operation;

The third switch status position: it is the position where the limit cam rotates right or left to the middle dead point. The automatic transfer switch in this position is in the middle position, and both power sources are working. This position is also the auxiliary switch on the common side and the auxiliary side on the standby side. At the node where the switch signal output state changes, the signal output states of the auxiliary switch on the common side and the auxiliary switch on the standby side are always in the opposite state. The inertia of the limit cam brought by the counterweight makes the limit cam pass through this position quickly. The auxiliary switch and the auxiliary switch on the standby side quickly complete the replacement of the working position, ensuring the reliable switching of the two power sources without overlapping power sources.

Utilizing the present invention to make the automatic transfer switch switch from one power supply to another working principle is as follows:

The switch is closed at the common power supply side, and the normally closed point of the auxiliary switch on the common power supply side is connected to the control circuit; when the power supply at the common power supply side is normal, the transfer switch will not act and keep the original state, and the magnetic system will not act at this time; when the remote When the control system detects abnormal changes in the working power of the common side and exceeds the set value range of the technical requirements, the remote control system sends a power switching command, the magnetic system is powered on, the moving iron core is attracted and closed, and the moving iron core is connected by the drive. The lever drives the limit cam to rotate to the left, the sliding guide rod on the common side slides along the first curved surface under the push of the return spring, the distance between the first curved surface and the tail of the auxiliary switch on the common side gradually increases, and the sliding guide rod on the standby side slides along the second curved surface. The curved surface slides, and the distance between the second curved surface and the tail of the auxiliary switch on the standby side gradually decreases. The moving contact of the auxiliary switch is fixed on the sliding guide rod, and the static contact is fixed inside the auxiliary switch. The normally closed point changes; when the limit cam rotates to the middle dead point position of the switch, the auxiliary switch contact on the common side changes from the normally closed point to the normally open point, causing the control circuit to lose power, the magnetic system loses power at the same time, and the moving iron The core is released, and the moving iron core continues to drive the limit cam to rotate to the left under the action of inertia, until the limit cam rotates to the bottom and stops rotating. work location.

The switch is closed on the standby power supply side, and the normally closed point of the auxiliary switch on the standby side is connected to the control circuit; when the power supply on the standby power supply side is normal, the transfer switch will not act and keep the original state, and the magnetic system will not act at this time. When the remote control system detects that there is an abnormal change in the working power supply on the standby side and exceeds the set value range of the technical requirements, the remote control system issues a switching command, the magnetic system is powered on, the moving iron core is attracted and closed, and the moving iron core passes through the drive. The connecting rod drives the limit cam to rotate to the right, and the sliding guide rod on the standby side slides along the second curved surface under the push of the return spring. When a curved surface slides, the distance between the first curved surface and the tail of the auxiliary switch on the common side gradually decreases. The movable contact of the auxiliary switch is fixed on the sliding guide rod, and the static contact is fixed inside the auxiliary switch. The sliding of the sliding guide rod makes the normal operation of the auxiliary switch The open and normally closed point changes; when the limit cam rotates to the middle dead point position of the switch, the backup side auxiliary switch contact changes from the normally closed point to the normally open point, resulting in the power loss of the control circuit and the power loss of the magnetic system at the same time. The iron core is released, and the moving iron core continues to drive the limit cam to rotate to the right under the action of inertia, until it stops at the end of the right rotation, the common power side of the switch is closed, and the switch is switched from the standby power side to the common power side. .

The invention adopts a magnetic system to realize the switching requirements of the normal power supply and the backup power supply of the automatic transfer switch, requires few parts, greatly reduces the production cost of the product, increases the reliability and safety of the product, and is energy-saving and environment-friendly.

In the present invention, the limit cam is connected with the moving iron core through the drive link, the power for the limit cam rotation is provided by the move iron core, and the rotation angle and the final position state of the limit cam are determined by the drive link, and the drive link The rod has not only played the role of connection, but also played a decisive role in the movement track of the limit cam.

In the present invention, the auxiliary switch on the common side and the auxiliary switch on the spare side are installed on the left side of the mounting plate through the adjusting screw, and the auxiliary switch on the common side and the auxiliary switch on the spare side can be fine-tuned by adjusting the screw, so that the auxiliary switch and the limit The cooperation of the two curved surfaces of the cam is more reliable. The common side sliding guide rod installed at the tail of the common side auxiliary switch slides reciprocally on the first curved surface of the limit cam, and the spare side slide guide rod installed at the tail of the spare side auxiliary switch slides reciprocally on the second curved surface of the limit cam, and the The working position conversion of the auxiliary switch on the common side and the auxiliary switch on the standby side; the reliability of the signal output state change of the auxiliary switch on the common side and the auxiliary switch on the standby side determines the reliability of switching between the two power sources.

In the present invention, when the magnetic system fails or the power supply cannot be provided by the power supply, the limit cam can be rotated manually with the help of tools, and the limit cam can be rotated to different positions according to the requirements for maintenance, debugging and overhaul. That is convenient and fast.

Description of drawings

Fig. 1 is a schematic view of the right structure of the present invention;

Fig. 2 is a schematic view of the left structure of the present invention;

Fig. 3 is a schematic diagram of cooperation between the auxiliary switch and the limit cam in Fig. 1;

Fig. 4 is a schematic diagram of the connection of the limit cam, the iron core, the drive link and the auxiliary switch on the common side in Fig. 1;

Fig. 5 is a schematic diagram of the connection of the limit cam, the iron core, the drive link and the auxiliary switch on the standby side in Fig. 1;

Fig. 6 is the structural representation of limit cam;

Fig. 7 is the structural representation of driving connecting rod;

Figure 8 is a schematic structural view of the mounting plate;

Fig. 9 is a schematic diagram of the connection between the auxiliary switch on the common side, the sliding guide rod on the common side and the first curved surface;

In the figure: 1. Mounting plate; 2. Limiting cam; 3. Auxiliary switch on the common side; 4. Auxiliary switch on the standby side; 5. Adjusting screw; 6. Limiting shaft; 7. Left wing plate; 8. Positioning hole ;9, moving iron core; 10, the first curved surface; 11, the second curved surface; 12, connecting rod mounting hole; 13, front vertical plate; 14, driving connecting rod; Rod; 17, commonly used side sliding guide rod.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 6, an energy-saving conversion device for a switching device includes a stamped mounting plate 1, the mounting plate 1 includes a front vertical plate 13, a left wing plate 7 perpendicular to the front vertical plate 13 and a right Side wing plate 15, limit shaft 6 runs through the axle center of left side wing plate 7, limit cam 2 and right side wing plate 15, and limit cam 2 is positioned at the middle of left side wing plate 7 and right side wing plate 15, limit The bit cam 2 includes a first curved surface 10 and a second curved surface 11. The first curved surface 10 is in conflict with the tail end of the common side sliding guide rod 17 installed at the tail of the common side auxiliary switch 3, and the front part of the common side sliding guide rod 17 is installed Inside the side wall of the auxiliary switch 3 on the common side, a return spring is installed at the joint; The front part is installed inside the side wall of the auxiliary switch 4 on the standby side, and a return spring is installed at the connection; the auxiliary switch 3 on the common side and the auxiliary switch 4 on the standby side are installed side by side on the front end of the left wing plate 7 through the adjusting screw 5; the first One side of the curved surface 10 is connected with the front end of the moving iron core 9 through the driving connecting rod 14, and the rear end of the moving iron core 9 extends to the outside of the mounting plate 1 after passing through the positioning hole 8 in the center of the front vertical plate 13, and the moving iron core 9 1. The driving link 14 and the limit cam 2 form a transmission link mechanism, the moving iron core 9 is installed in the magnetic system, the magnetic system is connected with the remote control system, and the moving iron core 9 is attracted or closed under the action of magnetic force in the magnetic system. Disengage the driving limit cam 2 to rotate, and then drive the first curved surface 10 to move relative to the sliding guide rod 17 on the normal side, and the second curved surface 11 to move relative to the sliding guide rod 16 on the standby side, so as to realize the auxiliary switch 3 on the common side and the auxiliary switch on the standby side 4 conversion of working positions.

As shown in Figure 6, the first curved surface 10 and the second curved surface 11 have the same shape, and both include three arc-shaped surfaces connected end to end. The first curved surface 10 and the second curved surface 11 take the axis of the limit cam 2 as the rotation point After relative rotation of 30-35°, the respective three arc-shaped surfaces are mutually dislocated.

As shown in Fig. 4 and Fig. 5, one side of the first curved surface 10 is provided with a connecting rod installation hole 12, and one end of the short rod at the front end of the driving connecting rod 14 passes through the connecting rod installing hole 12 and the rear end is fixed with a retaining ring, and the driving connecting rod 14 is fixed with a retaining ring. One end of the short rod at the rear end of the bar 14 is fitted in the connection hole at the front end of the moving iron core 9 .

As shown in FIG. 7 , the other end of the short rod at the front end and the other end of the short rod at the rear end of the driving link 14 are smoothly connected by a cross bar.

Utilizing the present invention to make the automatic transfer switch switch from one power supply to another working principle is as follows:

The switch is closed at the common power supply side, and the normally closed point of the auxiliary switch 3 on the common power supply side is connected to the control circuit; when the power supply at the common power supply side is normal, the transfer switch will not act and keep the original state, and the magnetic system will not act at this time; When the remote control system detects abnormal changes in the working power of the common side and exceeds the set value range of the technical requirements, the remote control system sends a power switching command, the magnetic system is powered on, the moving iron core 9 pulls in, and the moving iron core 9 The limit cam 2 is driven to rotate to the left by the driving connecting rod 14, and the sliding guide rod 17 on the common side slides along the first curved surface 10 under the push of the return spring, and the distance between the first curved surface 10 and the tail of the auxiliary switch 3 on the common side gradually increases. The sliding guide rod 16 on the standby side slides along the second curved surface 11, the distance between the second curved surface 11 and the tail of the auxiliary switch 4 on the standby side gradually decreases, the movable contact of the auxiliary switch is fixed on the sliding guide rod, and the static contact is fixed inside the auxiliary switch. The sliding of the sliding guide rod changes the normally open and normally closed point of the auxiliary switch; when the limit cam 2 rotates to the middle dead point position of the switch, the contact point of the auxiliary switch 3 on the common side changes from the normally closed point to the normally open point , leading to the power loss of the control circuit, the magnetic system loses power at the same time, the moving iron core 9 is released, and the moving iron core 9 continues to drive the limit cam 2 to rotate leftward under the action of inertia, until the limit cam 2 turns left to the end and stops rotating. When the standby power supply side is closed, the switch switches from the working position of the normal power supply side to the working position of the standby power supply side.

The switch is closed at the standby power supply side, and the normally closed point of the auxiliary switch 4 on the standby side is connected to the control circuit; when the power supply at the standby power supply side is normal, the changeover switch will not act and keep the original state, and the magnetic system will not act at this time. When the remote control system detects an abnormal change in the working power supply on the standby side and exceeds the set value range of the technical requirements, the remote control system sends a switching command, the magnetic system is powered on, the moving iron core 9 pulls in, and the moving iron core 9 The limit cam 2 is driven to rotate to the right by the driving connecting rod 14, and the sliding guide rod 16 on the standby side slides along the second curved surface 11 under the push of the return spring, and the distance between the second curved surface 11 and the tail of the auxiliary switch 4 on the standby side increases gradually. The sliding guide rod 17 on the common side slides along the first curved surface 10, the distance between the first curved surface 10 and the tail of the auxiliary switch 3 on the common side gradually decreases, the movable contact of the auxiliary switch is fixed on the sliding guide rod, and the static contact is fixed inside the auxiliary switch. The sliding of the sliding guide rod changes the normally open and normally closed point of the auxiliary switch; when the limit cam 2 rotates to the middle dead point position of the switch, the contact point of the auxiliary switch on the backup side changes from the normally closed point to the normally open point, As a result, the control circuit loses power, the magnetic system loses power at the same time, the moving iron core 9 is released, and the moving iron core 9 continues to drive the limit cam 2 to rotate to the right under the action of inertia, until it stops after the right rotation to the end, and the normal power supply side of the switch is closed. The switch switches from the standby power side working position to the normal power supply side working position.

The invention adopts a magnetic system to realize the switching requirements of the normal power supply and the backup power supply of the automatic transfer switch, requires few parts, greatly reduces the production cost of the product, increases the reliability and safety of the product, and is energy-saving and environment-friendly.

Claims (3)

1. An energy-saving conversion device of a switching electric appliance is characterized in that: the device comprises a stamping forming mounting plate (1), wherein the mounting plate (1) comprises a front vertical plate (13), a left side wing plate (7) and a right side wing plate (15) which are mutually perpendicular to the front vertical plate (13), a limiting shaft (6) penetrates through the left side wing plate (7), the axle center of a limiting cam (2) and the right side wing plate (15), the limiting cam (2) is positioned between the left side wing plate (7) and the right side wing plate (15), the limiting cam (2) comprises a first curved surface (10) and a second curved surface (11), the first curved surface (10) is in contact with the tail end of a common side sliding guide rod (17) arranged at the tail part of a common side auxiliary switch (3), the front part of the common side sliding guide rod (17) is arranged in the side wall of the common side auxiliary switch (3), and a reset spring is arranged at the connecting part; the second curved surface (11) is in contact with the tail end of a standby side sliding guide rod (16) arranged at the tail part of the standby side auxiliary switch (4), the front part of the standby side sliding guide rod (16) is arranged in the side wall of the standby side auxiliary switch (4), and a return spring is arranged at the joint; the common side auxiliary switch (3) and the standby side auxiliary switch (4) are arranged at the front end of the left side wing plate (7) side by side through the adjusting screw (5); one side of a first curved surface (10) is connected with the front end of a movable iron core (9) through a driving connecting rod (14), the rear end of the movable iron core (9) penetrates through a positioning hole (8) in the center of a front vertical plate (13) and then extends to the outer side of a mounting plate (1), the movable iron core (9), the driving connecting rod (14) and a limit cam (2) form a transmission connecting rod mechanism, the movable iron core (9) is arranged in a magnetic system, the magnetic system is connected with a remote control system, the movable iron core (9) is attracted or disconnected under the action of magnetic force in the magnetic system to drive the limit cam (2) to rotate, and then the first curved surface (10) and a common side sliding guide rod (17) are driven to move relatively, and the second curved surface (11) and a standby side sliding guide rod (16) move relatively, so that the working positions of the common side auxiliary switch (3) and the standby side auxiliary switch (4) are converted; the first curved surface (10) and the second curved surface (11) have the same shape and respectively comprise three arc surfaces which are connected end to end, and the three arc surfaces of the first curved surface (10) and the second curved surface (11) are arranged in a staggered manner after the axes of the limit cam (2) are used as rotation points to relatively rotate for 30-35 degrees;

in the energy-saving conversion device, the limit cam (2) enables the automatic conversion switch to have three important switch state positions: first switch state position: the limit cam (2) is rotated to the right to the bottom, and the position is the power supply position of the common power supply side of the automatic change-over switch, namely, after the first curved surface (10) on the limit cam (2) is matched with the auxiliary switch (3) on the common side, the output signal provided for the control system is a switching-on signal on the common power supply side, so that the change-over switch is ensured to be switched to the common power supply side to work normally; second switch state position: the position of the limit cam (2) is left-handed to the bottom, and the position is the power supply position of the standby power supply side of the automatic change-over switch, namely, after the second curved surface on the limit cam (2) is matched with the auxiliary switch (4) on the standby side, the output signal provided for the control system is a switching-on signal on the standby power supply side, so that the change-over switch is ensured to be switched to the standby power supply side for normal operation; third switch state position: the position of the limit cam (2) is in a right-hand or left-hand position to a middle dead point, the automatic change-over switch is positioned in a middle position, two paths of power supplies are all in operation, the position is a node for changing signal output states of the common side auxiliary switch (3) and the standby side auxiliary switch (4), the signal output states of the common side auxiliary switch (3) and the standby side auxiliary switch (4) are always kept in opposite states, the limit cam (2) is enabled to pass through the position quickly through inertia of the limit cam (2) brought by a counterweight, the replacement of the working position is completed quickly by the common side auxiliary switch (3) and the standby side auxiliary switch (4), reliable switching of the two paths of power supplies is guaranteed, and meanwhile, the phenomenon of power supply overlapping cannot occur.

2. The energy-saving conversion device of a switching device according to claim 1, wherein: one side of the first curved surface (10) is provided with a connecting rod mounting hole (12), one end of a front end short rod of the driving connecting rod (14) penetrates through the rear end part of the connecting rod mounting hole (12) and is fixed by a check ring, and one end of the rear end short rod of the driving connecting rod (14) is embedded in a connecting hole at the front end of the movable iron core (9).

3. The energy-saving switching device of a switching device according to claim 1 or 2, characterized in that: the other end of the front end short rod and the other end of the rear end short rod of the driving connecting rod (14) are in smooth connection through a cross rod.

Images