CN112859174B - Method for preventing proximity switch from vibrating and unstably - Google Patents
Method for preventing proximity switch from vibrating and unstably Download PDFInfo
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- CN112859174B CN112859174B CN202110016789.XA CN202110016789A CN112859174B CN 112859174 B CN112859174 B CN 112859174B CN 202110016789 A CN202110016789 A CN 202110016789A CN 112859174 B CN112859174 B CN 112859174B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
When the proximity switch is used, the proximity switch fixing device and the proximity switch triggering device are integrated in the same proximity switch seat, so that the positions of the proximity switch fixed on the proximity switch fixing device and the triggering plate of the proximity switch triggering device are relatively fixed, and the relative positions of the proximity switch and the triggering plate of the proximity switch seat arranged on the equipment base body cannot be changed under the action of equipment vibration. The method for preventing the vibration instability of the proximity switch ensures that the proximity switch is not affected by the vibration of equipment, the distance between the proximity switch and the detection plate is not changed, the relative stability of the distance between the proximity switch and the detection plate is realized by changing the triggering mode of the proximity switch, and meanwhile, the distance between the proximity switch and the detection plate is adjustable by arranging the adjusting mechanism, so that the proximity switch can adapt to the proximity switches of different models.
Description
Technical Field
The application relates to the technical field of non-contact electronic switches, in particular to a method for preventing vibration instability of a proximity switch.
Background
Proximity switches, also known as contactless proximity switches, are ideal electronic switching value sensors. When the metal detection body approaches the induction area of the switch, the switch can be in non-contact, pressure-free, spark-free and rapid-sending electric instructions, and accurately reflects the position and the stroke of the movement mechanism, and even if the metal detection body is used for general stroke control, the positioning precision, the operating frequency, the service life, the convenience of installation and adjustment and the applicability to severe environments are incomparable with those of a general mechanical stroke switch. It is widely used in machine tool, metallurgy, chemical industry, light spinning and printing industries. The method can be used as a link of limiting, counting, positioning control, automatic protection and the like in an automatic control system. The proximity switch is a position switch which can be operated without mechanical direct contact with a moving part, and when an induction surface of the object proximity switch reaches an action distance, the switch can be actuated without mechanical contact and any pressure application, so as to drive a direct current electric appliance or provide a control instruction for a computer (plc) device. The proximity switch is a switch type sensor (i.e. a contactless switch), has the characteristics of a travel switch and a micro switch, has the characteristics of sensing performance, and has the characteristics of reliable action, stable performance, quick frequency response, long application life, strong anti-interference capability and the like, and has the characteristics of water resistance, shock resistance, corrosion resistance and the like. The products include inductance type, capacitance type, hall type, AC type and DC type.
Most mechanical devices need to be operated through cooperation of various mechanisms, and state information of different components is acquired through a proximity switch, so that the proximity switch has wide application range in modern mechanical equipment industry. Fig. 1 is a diagram showing a typical state of use of a proximity switch in the prior art. As shown, the proximity switch 3 is fixed on the support 2, the support 2 is fixed on the device base 1, the moving part 4 moves with the detection plate 5, and when the detection plate 5 enters the detection range of the proximity switch 3, the proximity switch 3 sends a signal to the control system of the device. In some operations, the device base 1 or the moving part 4 is affected by the vibration of the device, so that the distance between the detection plate 5 and the proximity switch 3 is changed, and the signal of the proximity switch 3 is flashed, so that the real state of the moving part 4 cannot be reflected. Especially in some large automated production lines, a suspension of production due to abrupt changes in the signal of the proximity switch 3 often occurs, severely limiting the efficiency and stability of the automated production.
Disclosure of Invention
In order to solve the problems, the application provides a method for preventing the proximity switch from vibrating and unstably, which can ensure that the proximity switch is not influenced by equipment vibration, the distance between the proximity switch and a trigger plate of the proximity switch can not be changed by the method, the distance between the proximity switch and the detection plate is relatively stable by changing the trigger mode of the proximity switch, and meanwhile, the distance between the proximity switch and the detection plate can be adjusted by arranging an adjusting mechanism, so that the method can be suitable for proximity switches of different models.
The aim of the application is achieved by the following technical scheme.
When the proximity switch is used, the proximity switch fixing device and the proximity switch triggering device are integrated in the same proximity switch seat, so that the positions of the proximity switch fixed on the proximity switch fixing device and the triggering plate of the proximity switch triggering device are relatively fixed, and the relative positions of the proximity switch and the triggering plate of the proximity switch seat arranged on the equipment base body are not changed under the action of equipment vibration;
when the movement direction of the moving part is consistent with the movement direction of the trigger plate, the moving part presses down the trigger plate to enable the trigger plate to enter a detection range of the proximity switch, and the detection range is used for detecting the limit position state of the moving part;
when the moving direction of the moving part is vertical to the moving direction of the trigger plate, the moving part presses down the trigger plate gradually to enable the trigger plate to enter the detection range of the proximity switch, and along with the continuous movement of the moving part, the trigger plate gradually leaves the detection range of the proximity switch under the action of a reset device of the trigger plate and is used for detecting the position state of the moving part.
According to the method for preventing the vibration instability of the proximity switch, the guide device of the trigger plate is arranged in the proximity switch seat, so that the trigger plate can only move up and down along the guide device in the proximity switch seat, the trigger plate is prevented from moving in the left-right direction, and the horizontal linear distance of the trigger plate of the proximity switch cannot be changed.
According to the method for preventing the vibration instability of the proximity switch, the trigger plate is prevented from being separated from the proximity switch seat by arranging the clamping device between the trigger plate and the proximity switch seat.
In the method for preventing the vibration instability of the proximity switch, when the trigger plate is installed, the position of the proximity switch trigger device in the proximity switch seat is adjusted to adjust the horizontal linear distance between the trigger plate and the proximity switch so as to adapt to the types of the proximity switches in different detection ranges.
The method for preventing the vibration instability of the proximity switch ensures that the trigger plate does not spontaneously move downwards due to the vibration of the equipment in the non-triggered state of the moving part by increasing the friction resistance between the trigger plate and the guide device of the trigger plate.
The application has the beneficial effects that:
1. the method for preventing the vibration instability of the proximity switch is not affected by the vibration of equipment, and the distance between the proximity switch and the detection plate is not changed.
2. According to the method for preventing the vibration instability of the proximity switch, the distance between the proximity switch and the detection plate is relatively stable by changing the triggering mode of the proximity switch.
3. According to the method for preventing the proximity switch from vibrating unstably, the distance between the proximity switch and the detection plate is adjustable by arranging the adjusting mechanism, so that the method can be suitable for proximity switches of different types.
4. According to the method for preventing the proximity switch from shaking unstability, the friction ring is arranged in the guide sleeve, so that the plugboard has enough resistance under the triggering of no moving part, and the plugboard does not move downwards under the vibration of equipment to generate a signal flickering phenomenon.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. In the drawings:
fig. 1 is a schematic view of a prior art proximity switch.
Fig. 2 is a schematic diagram illustrating a method for preventing vibration instability of a proximity switch according to embodiment 1 of the present application.
Fig. 3 is a left side view showing a use state of the method for preventing vibration instability of the proximity switch in fig. 2.
Fig. 4 is a schematic diagram illustrating a method for preventing vibration instability of a proximity switch according to embodiment 2 of the present application.
Fig. 5 is a left side view showing a use state of the method for preventing vibration instability of the proximity switch in fig. 4.
Fig. 6 is an enlarged view of the portion a in fig. 2.
The components represented by the reference numerals in the figures are:
the device comprises a device base body 1, a bracket 2, a proximity switch 3, a moving part 4, a detection plate 5, a bottom plate 6, left and right vertical plates 7, a cover plate 8, a plugboard 9, a clamping table 9a, a collision block 10, a guide sleeve 11, a spring 12 and a friction ring 13.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
When the proximity switch 3 is used, the proximity switch fixing device and the proximity switch triggering device are integrated in the same proximity switch seat, so that the positions of the proximity switch 3 fixed on the proximity switch fixing device and the triggering plate of the proximity switch triggering device are relatively fixed, and the relative positions of the proximity switch 3 and the triggering plate of the proximity switch seat arranged on the equipment base body 1 are not changed under the action of equipment vibration;
when the movement direction of the moving part 4 is consistent with the movement direction of the trigger plate, the moving part 4 presses the trigger plate down to enable the trigger plate to enter the detection range of the proximity switch 3, so as to detect the limit position state of the moving part 4;
when the movement direction of the moving part 4 is perpendicular to the movement direction of the trigger plate, the moving part 4 presses down the trigger plate gradually to enable the trigger plate to enter the detection range of the proximity switch 3, and along with the continuous movement of the moving part 4, the trigger plate gradually leaves the detection range of the proximity switch 3 under the action of a reset device of the trigger plate and is used for detecting the position state of the moving part 4.
Further, the guide device of the trigger plate is arranged in the proximity switch seat, so that the trigger plate can only move up and down along the guide device in the proximity switch seat, the movement of the trigger plate in the left-right direction is avoided, and the horizontal linear distance of the trigger plate of the proximity switch 3 is not changed.
Further, the trigger plate is prevented from being separated from the proximity switch seat by providing a locking device between the trigger plate and the proximity switch seat, i.e. a locking stand 9a is provided at the lower part of the plug board 9, which will be described in detail in the proximity switch system below.
Further, when the trigger plate is installed, the position of the proximity switch trigger device in the proximity switch seat is adjusted to adjust the horizontal linear distance between the trigger plate and the proximity switch so as to adapt to the types of the proximity switches in different detection ranges.
Further, the use of increasing the frictional resistance between the trigger plate and the guide means of the trigger plate ensures that the trigger plate does not spontaneously move downwards due to vibrations of the device in the non-triggered state of the moving part 4.
The proximity switch system used by the method for preventing the vibration instability of the proximity switch comprises the proximity switch and a proximity switch seat; the proximity switch seat is fixed on the equipment base body and comprises a proximity switch fixing device and a proximity switch triggering device; the proximity switch fixing device and the proximity switch triggering device are both fixed on the proximity switch seat to form a stable whole, and the relative positions of the proximity switch and the triggering device cannot change due to vibration under the action of external vibration.
The proximity switch fixing device is used for fixedly installing a proximity switch.
The proximity switch triggering device is used for detecting the moving part, and after the moving part touches the triggering plate of the proximity switch triggering device, the triggering plate enters the detection range of the proximity switch under the pushing of the moving part.
The proximity switch seat further comprises a reset device of the trigger plate, and the trigger plate can be restored to the initial position after the moving part leaves the trigger plate.
The shockproof proximity switch system comprises the bottom plate and the support, wherein the bottom plate is fixedly connected with the equipment base body, the support is fixedly connected to the bottom plate, and the proximity switch is fixedly installed on the support.
The shockproof proximity switch system comprises a bottom plate, left and right vertical plates, a guide sleeve and an inserting plate; the bottom plate is fixedly connected with the equipment matrix, the 2 left and right vertical plates are fixedly arranged on the bottom plate, guide sleeves are arranged on the inner sides of the left and right vertical plates, the guide sleeves provide guidance for the plugboard, and the plugboard can only do vertical linear motion along the holes of the guide sleeves; the collision block fixed on the moving part can enable the plugboard to move up and down along the guide sleeve when touching the plugboard, and the plugboard leaves or enters the detection range of the proximity switch along with the up and down movement of the plugboard.
The shockproof proximity switch system comprises the proximity switch triggering device and further comprises the cover plate, wherein the cover plate is fixed above the left vertical plate and the right vertical plate, a hole through which the plugboard passes is formed in the cover plate, a clamping table is arranged at the lower part of the plugboard, and the clamping table can be clamped in the hole of the cover plate so that the plugboard cannot be separated from the cover plate.
According to the shockproof proximity switch system, the guide rail matched with the bottom of the guide sleeve is arranged on the bottom plate, and the guide sleeve moves on the bottom plate along the guide rail.
According to the shockproof proximity switch system, the guide sleeve is fixedly connected with the left vertical plate and the right vertical plate through the bolts, the long round holes are formed in the left vertical plate and the right vertical plate, the guide sleeve can move in the proximity switch seat to adjust the distance between the guide sleeve and the proximity switch, and the guide sleeve is fastened on the left vertical plate and the right vertical plate through the bolts after the adjustment is finished.
In the shockproof proximity switch system, the reset device is an elastic element arranged at the lower part of the plugboard.
In the shockproof proximity switch system, the elastic element is a spring.
In the shockproof proximity switch system, the friction ring is arranged on the guide sleeve, and the friction ring increases the resistance of the plugboard to move in the guide sleeve.
In the shockproof proximity switch system, the friction ring is a wear-resistant rubber ring.
Example 1
Referring to fig. 2 and 3, fig. 2 and 3 are views showing an anti-vibration proximity switch system according to embodiment 1 of the present application, including a proximity switch 3 and a proximity switch base; the proximity switch seat is fixed on the equipment base body 1 and comprises a proximity switch fixing device and a proximity switch triggering device; the fixing device for fixing the proximity switch and the triggering device for triggering the proximity switch are both fixed in the same proximity switch seat, so that the proximity switch and the triggering device are integrated, and the relative position of the proximity switch and the triggering device cannot be changed under the action of external vibration; the proximity switch fixing device is used for fixedly mounting the proximity switch 3; the proximity switch triggering device is used for detecting the moving part 4, and after the moving part 4 touches a triggering plate of the proximity switch triggering device, the triggering plate enters a detection range of the proximity switch 3 under the pushing of the moving part 4; the proximity switch seat further comprises a reset device of the trigger plate, and the trigger plate can be restored to the initial position after the moving part 4 leaves the trigger plate.
Specifically, the proximity switch fixing device comprises a bottom plate 6 and a support 2, the bottom plate 6 is combined or welded on the equipment base body 1 through bolts, the support 2 is welded and fixed on the bottom plate 6, the proximity switch 3 is fixedly installed on the support 2, the installation mode of the proximity switch 3 is determined according to the model of the proximity switch 3, as shown in fig. 1, the proximity switch 3 is penetrated into a hole of the support 2 in a common proximity switch fixing mode, and two ends of the proximity switch 3 are fixed through nuts.
As best seen in fig. 3, the proximity switch triggering device comprises a bottom plate 6, left and right vertical plates 7, a guide sleeve 11 and a plugboard 9, wherein the plugboard 9 is a triggering plate for solving the problem of the switch triggering device; the bottom plate 6 is fixedly connected with the equipment base body 1, the 2 left and right vertical plates 7 are fixedly arranged on the bottom plate 6 through bolts, guide sleeves 11 are arranged on the inner sides of the left and right vertical plates 7, the guide sleeves 11 provide guidance for the plugboard 9, and the plugboard 9 can only do vertical linear motion along holes of the guide sleeves 11; the collision block 10 fixed on the moving part 4 can enable the plugboard 9 to move up and down along the guide sleeve 11 when touching the plugboard 9, and the plugboard 9 leaves or enters the detection range of the proximity switch 3 along with the up and down movement of the plugboard 9; in this embodiment, two ends of the insert plate 9 are matched with the holes of the guide sleeve 11, and the middle part is a part for triggering the proximity switch 3, wherein the part is made of a material which can be detected by the selected proximity switch 3, for example, the proximity switch 3 is a type for detecting copper, at least the middle part of the insert plate 9 is made of copper, and the top of the insert plate 9 is widened and thickened, so that the contact area between the collision block 10 and the insert plate is increased.
In this embodiment, the movable member 4 does not move downward when the board 9 is pressed down, and the limit position of the downward movement of the movable member 4 is reached, and the proximity switch 3 is used to detect whether the movable member 4 reaches the limit position.
Specifically, the proximity switch triggering device further comprises a cover plate 8, the cover plate 8 is fixedly installed above the left vertical plate 7 and the right vertical plate 7 through bolt connection, a hole through which the plugboard 9 passes is formed in the cover plate 8, a clamping table 9a is arranged at the lower part of the plugboard 9, and the clamping table 9a can be clamped in the hole of the cover plate 8 so that the plugboard 9 cannot deviate from the cover plate 8.
Preferably, a guide rail matched with the bottom of the guide sleeve 11 is arranged on the bottom plate 6, as shown in fig. 3, a convex groove is arranged on the bottom plate 6, a clamping edge matched with the guide sleeve 11 is arranged on the bottom plate of the guide sleeve 11, and the guide sleeve 11 can move on the bottom plate 6 along the guide rail, so that the position of the guide sleeve 11 on the proximity switch seat can be conveniently adjusted.
Further, the guide sleeve 11 is fixedly connected with the left and right vertical plates 7 through bolts, oblong holes are formed in the left and right vertical plates 7, the guide sleeve 11 can move in the proximity switch seat to adjust the distance between the guide sleeve 11 and the proximity switch 3, and after the adjustment is finished, the guide sleeve 11 is fastened on the left and right vertical plates 7 through bolts.
In particular, the return means are elastic elements arranged in the lower part of the trigger plate, i.e. in the lower part of the insert plate 9, so that they can spontaneously rise under the action of the elastic elements.
Further, the elastic element is a spring 12, in this embodiment, the spring 12 is disposed in the guide sleeve 11, and the spring 12 has two functions, namely, providing a restoring force for the insert plate 9, and providing a certain upward force for the insert plate 9 when the moving part 4 does not touch the insert plate 9, so that the insert plate 9 is not affected by vibration of the device.
Preferably, a friction ring 13 is disposed on the guide sleeve 11, as shown in fig. 6, the friction ring 13 increases the resistance of the insert plate (9) moving in the guide sleeve 11, and the friction ring 13 further increases the resistance of the guide sleeve 11 to the insert plate 9, so that the insert plate 9 cannot move downwards under a certain degree of equipment vibration, and can only move downwards under the touch of the moving part 4.
Preferably, the friction ring 13 should be a wear-resistant rubber ring.
Example 2
If the opening and closing of the street lamp umbrella are required to be more purposeful or accurate under certain conditions, the opening and closing conditions of the street lamp umbrella are required to be further set, and the scheme for controlling the opening and closing of the street lamp umbrella by combining rainwater and light intensity signals is provided.
Referring to fig. 4 and 5, fig. 4 and 5 are views showing a vibration-proof proximity switch system of embodiment 2 of the present application, which is different from embodiment 1 in that the moving member 4 is further moved after the proximity switch 3 is activated, and more intuitively, the moving direction of the moving member 4 is perpendicular to the moving direction of the trigger plate, whereas in embodiment 1, the moving direction of the moving member 4 is identical to the moving direction of the trigger plate.
Specifically, the trigger plate, that is, the top of the plugboard 9 is set to be trapezoid, when the trigger plate contacts with the plugboard 9, the plugboard 9 is gradually pressed down by the contact of the impact block 10 with the inclined plane of the plugboard 9, and then the impact block passes through a section of plane contact, at this time, the lower part of the plugboard 9 enters the detection range of the proximity switch 3, then the impact block 10 gradually leaves the plugboard 9 along with the continuous movement of the moving part 4, and the plugboard 9 leaves the detection range of the proximity switch 3 under the action of the reset device.
Preferably, the contact portion of the bump 10 with the card 9 is rounded or shaped to match the top slope of the card 9, so that the engagement with the bump 10 is smoother.
Other technical matters not mentioned in this embodiment may be the same as those in embodiment 1, and will not be repeated.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (2)
1. A method for preventing a proximity switch from shaking and unstability is characterized in that when the proximity switch (3) is used, the proximity switch (3) fixed on the proximity switch fixing device and the position of a trigger plate of the proximity switch trigger device are relatively fixed by integrating the proximity switch fixing device and the proximity switch trigger device in the same proximity switch seat, and the relative positions of the proximity switch (3) and the trigger plate of the proximity switch seat arranged on a device base body (1) are not changed under the vibration action of the device;
when the movement direction of the moving part (4) is consistent with the movement direction of the trigger plate, the moving part (4) presses the trigger plate down to enable the trigger plate to enter a detection range of the proximity switch (3) for detecting the limit position state of the moving part (4);
when the movement direction of the moving part (4) is perpendicular to the movement direction of the trigger plate, the moving part (4) firstly presses down the trigger plate gradually to enable the trigger plate to enter the detection range of the proximity switch (3), and the trigger plate gradually leaves the detection range of the proximity switch (3) under the action of a reset device of the trigger plate along with the continuous movement of the moving part (4) so as to detect the position state of the moving part (4);
the trigger plate is prevented from being separated from the proximity switch seat by arranging a clamping device between the trigger plate and the proximity switch seat;
when the trigger plate is installed, the position of the proximity switch trigger device in the proximity switch seat is adjusted to adjust the horizontal linear distance between the trigger plate and the proximity switch so as to adapt to the types of the proximity switches in different detection ranges;
the guide device of the trigger plate is arranged in the proximity switch seat, so that the trigger plate can only move up and down along the guide device in the proximity switch seat, the movement of the trigger plate in the left-right direction is stopped, and the horizontal linear distance of the trigger plate of the proximity switch (3) is not changed;
the clamping device is arranged between the trigger plate and the proximity switch seat to ensure that the trigger plate cannot be separated from the proximity switch seat, and the clamping device is arranged at the lower part of the plugboard, so that the plugboard cannot be separated from the cover board due to the fact that the clamping device can be clamped in the hole of the cover board.
2. Method for preventing vibration instability of a proximity switch according to claim 1, characterized in that the use of increasing the friction resistance between the trigger plate and the guide means of the trigger plate ensures that the trigger plate does not move spontaneously downwards due to the vibration of the device in the non-triggered state of the moving part (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110016789.XA CN112859174B (en) | 2021-01-07 | 2021-01-07 | Method for preventing proximity switch from vibrating and unstably |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110016789.XA CN112859174B (en) | 2021-01-07 | 2021-01-07 | Method for preventing proximity switch from vibrating and unstably |
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| CN112859174A CN112859174A (en) | 2021-05-28 |
| CN112859174B true CN112859174B (en) | 2023-09-01 |
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Effective date of registration: 20230804 Address after: No. 16 Yucai West Road, Binhai County, Yancheng City, Jiangsu Province, 224000 Applicant after: Binhai County power supply branch of State Grid Jiangsu Electric Power Co.,Ltd. Applicant after: BINHAI QIANGYUAN ELECTRICAL INDUSTRY Co.,Ltd. Address before: Room 717, building 1, 132 Shenjia Road, Xiacheng District, Hangzhou City, Zhejiang Province 310004 Applicant before: Hangzhou Guozhi Technology Co.,Ltd. |
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