CN202083920U - Control device suitable for hydraulic system - Google Patents
Control device suitable for hydraulic system Download PDFInfo
- Publication number
- CN202083920U CN202083920U CN2011201763952U CN201120176395U CN202083920U CN 202083920 U CN202083920 U CN 202083920U CN 2011201763952 U CN2011201763952 U CN 2011201763952U CN 201120176395 U CN201120176395 U CN 201120176395U CN 202083920 U CN202083920 U CN 202083920U
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- CN
- China
- Prior art keywords
- control
- contactor
- hydraulic system
- connects
- circuit breaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
A control device suitable for a hydraulic system comprises a main loop and a control loop. The control loop comprises a stop part and a control part. The control part comprises two branch circuits in parallel connection. One branch circuit comprises two circuits and a control contact of a thermorelay, which are sequentially connected, wherein one circuit consists of a start button and an auxiliary contact of an AC contactor, and the other circuit consists of the coil of the AC contactor and the coil of a time relay. The other branch circuit comprises a pressure relay, the normally open contact of the time relay and an alarm lamp which are sequentially connected. The control device suitable for the hydraulic system solves the problem of false alarm caused by the reason that the pressure of the starting hydraulic system is lower than the set normal value, enhances the alarm accuracy, brings convenience for the work of operating staff, and can be widely used for controlling hydraulic systems.
Description
Technical field
The utility model relates to automatic control technology, particularly is applicable to the control device of hydraulic system.
Background technology
Controlled hydraulic system pressure remains in the normal range, in the existing HYDRAULIC CONTROL SYSTEM device, generally pressure switch is sealed in alarm circuit.Therefore have following problem: when the Oil pump electrical machinery of hydraulic system had just started, pressure switch detected the normal value that system pressure is lower than setting and then reports to the police, and along with system pressure is elevated to normal value gradually, just stops warning.Be elevated to normal value and need the regular hour and start to pressure from hydraulic system, do not need during this period of time to report to the police, pressure switch detects the normal value that system pressure is lower than setting and but sends alerting signal, may make operating personnel carry out maloperation sometimes.
The utility model content
It is accurate that the technical problems to be solved in the utility model provides a kind of warning, and pressure is lower than the control device that is applicable to hydraulic system that normal value produces wrong report in the time of effectively avoiding starting because of hydraulic system.
The technical solution of the utility model is: the control device that is applicable to hydraulic system, comprise major loop, control loop, described major loop comprises the miniature circuit breaker one that connects three-phase alternating-current supply, the main contacts of the A.C. contactor that is connected successively with miniature circuit breaker one, electrothermal relay, the terminals of three phase alternating current motor; Described control loop comprises shuts down part and control section; the described part of shutting down comprises the miniature circuit breaker two that connects successively; fuse; stop button; wherein miniature circuit breaker two connects single phase poaer supply; stop button connects an end of control section; the other end of control section is connected to center line; described control section comprises two branch roads that are in parallel; wherein branch road comprises the circuit that the auxiliary contact of the start button that connects successively and A.C. contactor compose in parallel; the control contact of electrothermal relay; the circuit that ac contactor coil and time relay coil compose in parallel; another branch road comprises the pressure switch that connects successively, time relay normally opened contact, alarm lamp.
The beneficial effects of the utility model are: owing to be provided with the time relay at control section, time relay normally opened contact is contained between pressure switch and the alarm lamp, therefore starting to pressure from hydraulic system is elevated to the normal value of setting in required surge time, can not send alerting signal because of system pressure reaches normal value, strengthen the accuracy of reporting to the police, helped operating personnel's work.
Description of drawings
Fig. 1 is a principle schematic of the present utility model.
Being numbered of each several part among the figure: R-S-T-three-phase alternating-current supply; The T-single phase poaer supply; The N-center line; QF1-miniature circuit breaker one; QF2-miniature circuit breaker two; The KM-A.C. contactor; The KH-electrothermal relay; The M-three phase alternating current motor; The FU-fuse; The SB1-stop button; The SB2-start button; The KT-time relay; The SP-pressure switch; The HL-alarm lamp; The terminals of U-V-W-three phase alternating current motor.
Embodiment
Embodiment 1: as shown in Figure 1, be applicable to the control device of hydraulic system, comprise major loop, control loop, described major loop comprises miniature circuit breaker one QF1 that connects three-phase alternating-current supply R-S-T, the main contacts of the A.C. contactor KM that is connected successively with miniature circuit breaker one QF1, electrothermal relay KH, the terminals U-V-W of three phase alternating current motor; Described control loop comprises shuts down part and control section; the described part of shutting down comprises miniature circuit breaker two QF2 that connect successively; fuse FU; stop button SB1; wherein miniature circuit breaker two QF2 connect single phase poaer supply T; stop button SB1 connects an end of control section; the other end of control section is connected to center line N; described control section comprises two branch roads that are in parallel; wherein branch road comprises the circuit that the auxiliary contact of the start button SB2 that connects successively and A.C. contactor KM compose in parallel; the control contact of electrothermal relay KH; the circuit that the coils from parallel connection of coils of the coil of A.C. contactor KM and time relay KT is formed; another branch road comprises the pressure switch SP that connects successively, the normally opened contact of time relay KT, alarm lamp HL.
The pressure measuring tie-in of pressure switch SP is connected to the check point that needs detected pressures in the hydraulic system, and it can come the form output of detected force value with switching value.As closed miniature circuit breaker one QF1, miniature circuit breaker two QF2, press start button SB1, the coil of the coil of A.C. contactor KM, time relay KT gets electric, the main contacts closure of A.C. contactor KM, three phase alternating current motor M starts working, the closed self-locking of the auxiliary contact of A.C. contactor KM.Simultaneously, time relay KT picks up counting, and in the timing time of setting, the normally opened contact of time relay KT disconnects, and can not report to the police.Have only when the timing time of setting and arrive, the normally opened contact closure of time relay KT, the detected hydraulic system pressure of pressure switch SP just sends signal when being below or above the normal value of setting, and alarm lamp HL is lighted.Owing to be provided with time relay KT at control section, the normally opened contact of time relay KT is contained between pressure switch SP and the alarm lamp HL, therefore starting to pressure from hydraulic system is elevated to the normal value of setting in required surge time, can not send alerting signal because of the normal value that system pressure does not reach setting, strengthen the accuracy of reporting to the police, helped operating personnel's work.
Claims (1)
1. be applicable to the control device of hydraulic system, comprise major loop, control loop, described major loop comprises the miniature circuit breaker one (QF1) that connects three-phase alternating-current supply (R-S-T), the main contacts of the A.C. contactor (KM) that is connected successively with miniature circuit breaker one (QF1), electrothermal relay (KH), the terminals of three phase alternating current motor (U-V-W); Described control loop comprises shuts down part and control section; the described part of shutting down comprises the miniature circuit breaker two (QF2) that connects successively; fuse (FU); stop button (SB1); wherein miniature circuit breaker two (QF2) connects single phase poaer supply (T); stop button (SB1) connects an end of control section; the other end of control section is connected to center line (N); it is characterized in that described control section comprises two branch roads that are in parallel; wherein branch road comprises the circuit that the auxiliary contact of the start button (SB2) that connects successively and A.C. contactor (KM) compose in parallel; the control contact of electrothermal relay (KH); the circuit that the coils from parallel connection of coils of the coil of A.C. contactor (KM) and the time relay (KT) is formed; another branch road comprises the pressure switch (SP) that connects successively, the normally opened contact of the time relay (KT), alarm lamp (HL).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201763952U CN202083920U (en) | 2011-05-20 | 2011-05-20 | Control device suitable for hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201763952U CN202083920U (en) | 2011-05-20 | 2011-05-20 | Control device suitable for hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202083920U true CN202083920U (en) | 2011-12-21 |
Family
ID=45344543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201763952U Expired - Lifetime CN202083920U (en) | 2011-05-20 | 2011-05-20 | Control device suitable for hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202083920U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870907A (en) * | 2016-05-27 | 2016-08-17 | 湖南福德电气有限公司 | Protection device applicable to high-power load test |
| CN109742731A (en) * | 2019-01-17 | 2019-05-10 | 张年宝 | A kind of A.C. contactor from carrying coil short protection |
-
2011
- 2011-05-20 CN CN2011201763952U patent/CN202083920U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870907A (en) * | 2016-05-27 | 2016-08-17 | 湖南福德电气有限公司 | Protection device applicable to high-power load test |
| CN109742731A (en) * | 2019-01-17 | 2019-05-10 | 张年宝 | A kind of A.C. contactor from carrying coil short protection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111221 |
|
| CX01 | Expiry of patent term |