CN216251779U - High-reliability deviation protection device - Google Patents
High-reliability deviation protection device Download PDFInfo
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- CN216251779U CN216251779U CN202122768156.2U CN202122768156U CN216251779U CN 216251779 U CN216251779 U CN 216251779U CN 202122768156 U CN202122768156 U CN 202122768156U CN 216251779 U CN216251779 U CN 216251779U
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Abstract
The utility model relates to a high-reliability deviation protection device. The existing deviation protection structure is simple, only a microswitch is used as a deviation detection switch of a core action element, and the sealing performance of the deviation switch is poor. A high-reliability off tracking protection design comprises the following components: the device comprises an alternating current power switch (2), an intermediate isolation relay box (1) with good waterproofness, a terminal strip (3) and a waterproof deviation switch with a customized length signal output line, wherein the deviation protection operation power supply site side uses an alternating current power supply and is provided with the power switch; the deviation switch is a water-resistant deviation switch for customizing the length of a conducting wire, and a closed proximity switch is generally selected as a deviation detection switch element; the deviation switch is composed of a deviation signal detection switch (4) at the side A (and a deviation signal detection switch (5) at the side B, and an intermediate relay which is driven by 3 AC coils to serve as indication is arranged in an intermediate isolation relay box.
Description
Technical Field
The utility model relates to a high-reliability deviation protection device.
Background
The existing deviation protection structure is simple, only a microswitch is used as a deviation detection switch of a core action element, and the switch has the following defects: the sealing performance of the deviation switch is poor, the self-breathing effect of a deviation switch shell caused by the change of the environmental temperature is easy to occur in a humid environment, the sucked moisture is condensed in the switch shell, and the micro-motion water inlet grounding and short circuit which is not sealed originally in the shell is caused by water accumulation for a short time; this is not only prone to protection malfunction, but also to ground fault of the protection operation circuit; due to the structural design of the microswitch, the product quality is unreliable, even if a water inlet short circuit does not occur, misoperation also occurs due to the breakage of a spring piece in the microswitch. Due to the two reasons, the reliability of the common deviation protection is low, and the maintenance workload is heavy. If the system is not reasonably designed, the fault is difficult to find and process in a short time after the fault occurs.
Disclosure of Invention
The utility model aims to provide a high-reliability deviation protection device.
The above purpose is realized by the following technical scheme:
a high-reliability deviation protection device comprises: the auxiliary device comprises an intermediate isolation relay box, an alternating current power supply switch, a deviation switch, a terminal row and intermediate relays taking the driving of 3 AC type coils as indication, wherein the alternating current power supply switch, the terminal row and the intermediate relays taking the driving of 3 AC type coils as indication are arranged in the intermediate isolation relay box, the intermediate relays taking the driving of 3 AC type coils as indication are respectively an alternating current power supply monitoring relay, a light deviation alarm relay and a heavy deviation alarm relay, and normally closed output contacts of the alternating current power supply monitoring relay are connected in parallel with the output end of the deviation alarm relay and are in logical or relation with the output end of the light deviation alarm relay;
the middle isolation relay box is arranged on one side of a deviation switch, the deviation switch consists of a deviation signal detection switch on the side A and a deviation signal detection switch on the side B, and output dry contact signals of the deviation signal detection switch on the side A and the deviation signal detection switch on the side B enter a DCS or a PLC control cabinet in a one-to-one mode;
the alternating current power supply switch, the alternating current power supply monitoring relay, the light deviation alarming relay and the heavy deviation alarming relay are respectively connected with the terminal strip.
The high-reliability deviation protection device is characterized in that the deviation signal detection switch on the side A and the deviation signal detection switch on the side B are in parallel connection with the coil loop of the light deviation alarm relay in light deviation, and the heavy deviation is in parallel connection with the coil loop of the heavy deviation alarm relay in heavy deviation.
The high-reliability deviation protection device is characterized in that the deviation signal detection switch on the side A and the deviation signal detection switch on the side B adopt closed proximity switches.
The utility model has the beneficial effects that:
1. in order to improve the safety and reliability of equipment, an alternating current power supply is used at the side of a deviation detection switch which is easy to generate short circuit and ground fault, and an intermediate relay is used for isolating the deviation detection switch, so that the ground fault is limited at the alternating current side and is not conducted to a remote deviation signal detection channel, and a fault point is isolated in on-site equipment; the other purpose of designing the intermediate isolation relay box is to install a cable joint which transmits a remote deviation signal in the control box, and because the installation position of the control box is higher, the occurrence of a terminal block grounding fault caused by water inflow and accumulated water in the control box is avoided, so that the running reliability of equipment for remotely receiving the deviation signal is improved, and the reliability of a local control box power supply is also improved.
The off tracking signal detection switch selected by the utility model is a customized switch, and is improved from the aspects of water resistance, protection misoperation caused by spring breakage of the detection element and prevention of short circuit fault of the middle wire joint 3, so that the possibility of faults in the three places is effectively reduced.
Through the measures in the 7 aspects, the reliability of deviation protection is improved, even if a fault occurs, a fault point can be quickly indicated to maintenance personnel after the deviation protection action alarms, the fault checking and processing speed and efficiency of the maintenance personnel are improved, and the time of the fault influencing the normal operation and use of equipment is shortened.
The deviation signal detection switches P2AA and P2AB of the utility model need waterproof magnetic induction proximity switches as deviation switches of action sensing elements, and are used for preventing internal short circuit faults of open shell switches caused by self breathing of the deviation switches. The output signal transmission cables of the deviation signal detection switches P2AA and P2AB are cables with customized length, and the occurrence of damp short-circuit faults caused by the fact that an intermediate joint is generated when the cables are connected in the installation process and the intermediate joint is not sealed tightly is mainly avoided. The light deviation of deviation signal detection switches P2AA and P2AB are connected in parallel with a coil loop of a KC-Q light deviation isolation relay; the heavy deviation is connected in parallel with a coil loop of a KC-Z heavy deviation isolation relay; the purpose of doing so is to reduce the quantity of intermediate relay's use in the control box, reduces the manufacturing cost of intermediate isolation relay case.
Description of the drawings:
FIG. 1 is a diagram of the component placement and wire connection system of the present invention;
fig. 2 is a schematic block diagram of the electrical wiring corresponding to the system of the present invention.
In the figure: 1. the device comprises an intermediate isolation relay box, 2, an alternating current power supply switch, 3, a terminal strip, 4, a side A deviation signal detection switch, 5, a side B deviation signal detection switch, 6, a light deviation alarm relay, 7, a heavy deviation alarm relay and 8, an alternating current power supply monitoring relay.
The specific implementation mode is as follows:
example 1:
a high-reliability deviation protection device comprises: the device comprises an alternating current power switch 2, an intermediate isolation relay box 1 with good waterproofness, a terminal strip 3 and a waterproof deviation switch with a customized length signal output line, wherein the deviation protection operation power supply uses an alternating current power supply and is provided with a power switch; the deviation switch is a water-resistant deviation switch for customizing the length of a conducting wire, and a closed proximity switch is generally selected as a deviation detection switch element; the deviation switch consists of a deviation signal detection switch 4 (P2 AA) at the side A and a deviation signal detection switch 5 (P2 AB) at the side B, and 3 intermediate relays driven by AC coils are arranged in the intermediate isolation relay box and used for indicating; the intermediate relay driven by the 3 AC coils to indicate is a light deviation alarm relay 6 (KC-Q); a heavy deviation alarm relay 7 (KC-Z); and an alternating-current power supply monitor relay 8 (KC-JSP); the normally closed output contact of the alternating current power supply monitoring relay is connected in parallel with the output end of the light deviation warning relay (KC-Q), and is in logical or relation with the output of the light deviation warning relay (KC-Q); the intermediate relay box is arranged beside the deviation switch; and the output dry contact signals of the light and heavy deviation switches enter a remote DCS or PLC control cabinet one by one.
The deflection protection design intermediate relay box is used for preventing the fault short circuit of the deflection switch from directly entering a remote DCS or PLC system to influence the stability of the remote DCS or PLC system;
the power supply monitoring relay is designed in the intermediate isolation relay box to prevent the problem of protection failure caused by no alarm when the power supply disappears;
the light and heavy contact point signals of the deviation signal detection switch on the side A and the deviation signal detection switch on the side B enter a remote DCS or PLC control cabinet one by one, so that deviation action point numbers can be directly displayed in the remote DCS or PLC during deviation action, and faults can be conveniently and rapidly searched and processed.
Example 2:
in the high-reliability deviation protection device in embodiment 1, the intermediate relay uses the belt as an indication to directly display the action situation on site, and distinguish which of two different deviations in the same box is acted or has a fault on the terminal block. The deviation detecting element uses an alternating current control power supply and is provided with a power switch; the high-reliability deviation protection is provided with an intermediate relay box, and wires are connected in the intermediate relay box no matter the DCS, the PLC or the deviation detection element arrives at a remote place.
The middle isolation relay box is internally provided with 3 middle relays with action indications, the output of the light deviation alarm relay is connected with the output of the power supply monitoring relay in parallel or logically output, and the output of the heavy deviation alarm relay is independently output.
The deviation signal detection switch uses a magnetic induction proximity switch with good waterproof performance. The off tracking signal detection switch uses the length of a customized output line, and an intermediate joint in the line pipe is avoided.
In fig. 2, a KC-Z heavy deviation signal is taken from a normally open contact of a KC-Z deviation intermediate relay and is used as a remote heavy deviation signal ZPP,
the light deviation signal of the KC-Q is taken from a normally open contact of a KC-Q deviation intermediate relay and is used as a QPP signal of the remote light deviation signal,
meanwhile, a normally closed contact of the KC-JSP is connected in parallel with an output signal end of the KC-Q, a QPP light deviation alarm signal is sent to a far side in time after a power supply disappears, workers are reminded of checking and processing defects in time, and protection failure is prevented.
Example 3:
the high-reliability deviation protection design device system comprises: the device comprises a remote deviation detection signal input channel, a local intermediate isolation relay box and a high-reliability water-resistant magnetic induction proximity switch type deviation signal detection switch, wherein the remote deviation detection signal input channel is independently entered, specific wiring is not drawn in the device, and a controller in the industry can understand how to implement the device. The on-site intermediate isolation relay box is designed according to the figure 1, relevant electrical equipment manufacturers can manufacture and process the on-site intermediate isolation relay box, and the customized deviation signal detection switches P2AA and P2AB are easy to manufacture and process in relevant product manufacturing industries.
The light deviation P2AA-Q, P2AB-Q in the deviation detecting switches P2AA and P2AB are connected in parallel and then connected into a coil KC-Q loop of the light deviation relay, and any light deviation action can give an alarm;
heavy deviation P2AA-Z, P2AB-Z in the deviation detection switches P2AA and P2AB are connected in parallel and then are connected into a coil KC-Z loop of the heavy deviation relay, and any heavy deviation action can output a heavy deviation alarm signal.
Claims (3)
1. A high-reliability deviation protection device comprises: intermediate relay who instructs is made in the drive of intermediate isolation relay case, alternating current power switch, off tracking switch, terminal row and 3 AC type coils, characterized by: the alternating current power supply switch, the terminal strip and the intermediate relay which is driven by the 3 AC type coils to make indication are arranged in the intermediate isolation relay box, the intermediate relay which is driven by the 3 AC type coils to make indication is respectively an alternating current power supply monitoring relay, a light deviation alarm relay and a heavy deviation alarm relay, and the normally closed output contact of the alternating current power supply monitoring relay is connected in parallel with the output end of the light deviation alarm relay and is in logical OR relation with the output end of the light deviation alarm relay;
the middle isolation relay box is arranged on one side of a deviation switch, the deviation switch consists of a deviation signal detection switch on the side A and a deviation signal detection switch on the side B, and output dry contact signals of the deviation signal detection switch on the side A and the deviation signal detection switch on the side B enter a DCS or a PLC control cabinet in a one-to-one mode;
the alternating current power supply switch, the alternating current power supply monitoring relay, the light deviation alarming relay and the heavy deviation alarming relay are respectively connected with the terminal strip.
2. The high-reliability deviation protection device according to claim 1, wherein: the light deviation of the deviation signal detection switch on the side A and the light deviation of the deviation signal detection switch on the side B are connected in parallel with a coil loop of the light deviation alarm relay, and the heavy deviation is connected in parallel with a coil loop of the heavy deviation alarm relay.
3. The high-reliability deviation protection device according to claim 2, wherein: the side A deviation signal detection switch and the side B deviation signal detection switch are closed proximity switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122768156.2U CN216251779U (en) | 2021-11-12 | 2021-11-12 | High-reliability deviation protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122768156.2U CN216251779U (en) | 2021-11-12 | 2021-11-12 | High-reliability deviation protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216251779U true CN216251779U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122768156.2U Active CN216251779U (en) | 2021-11-12 | 2021-11-12 | High-reliability deviation protection device |
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| Country | Link |
|---|---|
| CN (1) | CN216251779U (en) |
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2021
- 2021-11-12 CN CN202122768156.2U patent/CN216251779U/en active Active
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