CN203886279U - Safety protection device for rotary filter screen - Google Patents
Safety protection device for rotary filter screen Download PDFInfo
- Publication number
- CN203886279U CN203886279U CN201420270921.5U CN201420270921U CN203886279U CN 203886279 U CN203886279 U CN 203886279U CN 201420270921 U CN201420270921 U CN 201420270921U CN 203886279 U CN203886279 U CN 203886279U
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- CN
- China
- Prior art keywords
- protection device
- rotary sieve
- safety protection
- safety guard
- approach switch
- 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 - Fee Related
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Abstract
The utility model discloses a safety protection device for a rotary filter screen. The safety protection device comprises a small driving chain wheel (1) and a shaft sleeve (3), wherein the shaft sleeve (3) is connected with the small driving chain wheel (1) through a safety pin (2) and connected with a speed reducer (4) of a motor; an induction block (5) is welded to the surface of the small driving chain wheel (1), and approach switches (6) are arranged on the circular motion outer side of the induction block (5) and connected with a time relay (7). The safety protection device is reason in structural design and can avoid the situation that the rotary filter screen is rusted to be locked so as not to be operated. The safety protection device adopts three approach switches for simultaneous induction so as to solve the problem that a safety mechanism cannot be operated as single approach switch is damaged. By using a non-contacting electromagnetic induction way, the safety protection device can accurately judge whether the rotary filter screen is in an overload state or not.
Description
Technical field
The utility model relates to a kind of rotary sieve corollary apparatus, is specifically related to a kind ofly can accurately judge the whether rotary sieve safety guard in overload of rotary sieve.
Background technology
Along with the increase of generating set capacity, power plant also increases day by day for the demand of cooling water.Rotary sieve is a kind of important water intaking filter.Its safety protection mechanism, for the normal operation of rotary sieve, plays vital effect.
When overload; safety pin in existing rotary sieve safety guard between connection for transmission minor sprocket and axle sleeve is cut off; the power that rotary sieve motor reducer produces cannot effectively pass to transmission minor sprocket by axle sleeve; transmission minor sprocket and axle sleeve relatively rotate; the safe switch block of axle sleeve ejects and touches travel switch under the effect of spring strength; signal is delivered to electric control loop, and motor reducer is out of service.
Because rotary sieve is for a long time in outdoor intake place, the switch block in existing rotary sieve safety protection mechanism, spring, travel switch extremely get rusty easily stuck, and while causing transshipping, safety protection mechanism cannot run well, and causes potential safety hazard.Existing rotary sieve safety guard need to arrange safe switch block between active minor sprocket and axle sleeve, has greatly increased machining period, and production cost is high, and regular maintenance is also very complicated.
Summary of the invention
Goal of the invention: the purpose of this utility model is in order to solve the deficiencies in the prior art, provides a kind of reasonable in design, simple in structure, easy to maintenance, the rotary sieve safety guard of dependable performance.
Technical scheme: in order to realize above object, the technical scheme that the utility model is taked is:
A kind of rotary sieve safety guard; it comprises: transmission minor sprocket; the axle sleeve being connected with transmission minor sprocket by safety pin; described axle sleeve is connected with the reductor of motor; the surface soldered of described transmission minor sprocket has sensor block; in sensor block circular motion arranged outside, have approach switch, approach switch is connected with the time relay.
As preferred version, above-described rotary sieve safety guard, described approach switch is 3, is mutually 120 degree angles, lays respectively at the outside of sensor block.Described approach switch and the distance between inductor are not more than the maximum distance of reaction of approach switch.
As preferred version, above-described rotary sieve safety guard, the described time relay is 3, is connected respectively with approach switch.
As preferred version, above-described rotary sieve safety guard, described sensor block length is greater than 1/3 of transmission minor sprocket overall circumference length.This structure can prevent that two of inductor from correcting the induction central point in two approach switchs, and assurance approach switch is effectively responded to.
As preferred version, above-described rotary sieve safety guard, described approach switch is 5mm in the distance of sensor block top.
Rotary sieve safety guard described in the utility model, the transmission of power that wherein reductor of motor produces is to axle sleeve, axle sleeve is by safety pin, transmission of power to transmission minor sprocket, the as a whole run-in synchronism of transmission minor sprocket and inductor.
Rotary sieve safety guard described in the utility model, 3 described time relays, monitor in real time to the normally opened contact of 3 approach switchs, when approach switch damages, can send in time alarm signal.
Beneficial effect: compared to the prior art a kind of rotary sieve safety guard described in the utility model has the following advantages:
Rotary sieve safety guard provided by the utility model; can avoid conventional security protection mechanism because of the stuck situation that cannot turn round of getting rusty; adopted 3 approach switchs to respond to simultaneously; can avoid damaging because of single approach switch the problem that causes release mechanism to turn round; and safe switch block need to be set between active minor sprocket and axle sleeve; structure is simpler, convenient for installation and maintenance.
Accompanying drawing explanation
the cross-sectional view of the rotary sieve safety guard that Fig. 1 provides for the utility model.
The structural representation of the rotary sieve safety guard that Fig. 2 provides for the utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment and only for the utility model is described, be not used in restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.
As depicted in figs. 1 and 2; a kind of rotary sieve safety guard; it comprises: transmission minor sprocket (1); the axle sleeve (3) being connected with transmission minor sprocket (1) by safety pin (2); described axle sleeve (3) is connected with the reductor (4) of motor; the surface soldered of described transmission minor sprocket (1) has sensor block (5), in sensor block (5) circular motion arranged outside, has approach switch (6), and approach switch (6) is connected with the time relay (7).
Above-described rotary sieve safety guard, described approach switch (6) is 3, is mutually 120 degree angles, lays respectively at the outside of sensor block (5).
Above-described rotary sieve safety guard, the described time relay (7) is 3, is connected respectively with approach switch (6).
Above-described rotary sieve safety guard, described sensor block (5) length is greater than 1/3 of transmission minor sprocket overall circumference length.
Rotary sieve safety guard described in the utility model, when rotary sieve normally moves, transmission minor sprocket (1) is synchronizeed rotation with axle sleeve (3), and 3 approach switchs (6) are respectively for the time consistency of sensor block (5) induction.All less times greater than axle sleeve (3), rotate a circle 1/3 of the time.Now the electric time that obtains of the time relay (6) is not more than setting value, and contact can not moved.
When rotary sieve transships, safety pin (2) is cut off, the power that the reductor of motor (4) produces cannot effectively pass to transmission minor sprocket (1), transmission minor sprocket (1) relatively rotates with axle sleeve (3), in 3 approach switchs (6), having at least 1 sensitive time to be obviously greater than axle sleeve (3) rotates a circle 1/3 of the time, the electric time that obtains of the time relay (6) is greater than setting value, and reductor (4) power supply of motor is cut off in the action of the time relay (6) contact.
Above-described rotary sieve safety guard, described approach switch (6) is 5mm in the distance of sensor block (5) top.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a rotary sieve safety guard; it is characterized in that; it comprises: transmission minor sprocket (1); the axle sleeve (3) being connected with transmission minor sprocket (1) by safety pin (2); described axle sleeve (3) is connected with the reductor (4) of motor; the surface soldered of described transmission minor sprocket (1) has sensor block (5), in sensor block (5) circular motion arranged outside, has approach switch (6), and approach switch (6) is connected with the time relay (7).
2. rotary sieve safety guard according to claim 1, is characterized in that, described approach switch (6) is 3, is mutually 120 degree angles, lays respectively at the outside of sensor block (5).
3. rotary sieve safety guard according to claim 2, is characterized in that, the described time relay (7) is 3, is connected respectively with approach switch (6).
4. rotary sieve safety guard according to claim 3, is characterized in that, described sensor block (5) length is greater than 1/3 of transmission minor sprocket overall circumference length.
5. rotary sieve safety guard according to claim 4, is characterized in that, described approach switch (6) is 5mm in the distance of sensor block (5) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270921.5U CN203886279U (en) | 2014-05-26 | 2014-05-26 | Safety protection device for rotary filter screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270921.5U CN203886279U (en) | 2014-05-26 | 2014-05-26 | Safety protection device for rotary filter screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203886279U true CN203886279U (en) | 2014-10-22 |
Family
ID=51712731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420270921.5U Expired - Fee Related CN203886279U (en) | 2014-05-26 | 2014-05-26 | Safety protection device for rotary filter screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203886279U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552479A (en) * | 2014-12-22 | 2015-04-29 | 重庆市卓玛家具有限公司 | Alarm mechanism for panel processing equipment |
| CN109510171A (en) * | 2018-11-16 | 2019-03-22 | 浙江特晟智能科技有限公司 | Downstairs system on a kind of electric motor protective device and hanger with motor protective circuit |
-
2014
- 2014-05-26 CN CN201420270921.5U patent/CN203886279U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552479A (en) * | 2014-12-22 | 2015-04-29 | 重庆市卓玛家具有限公司 | Alarm mechanism for panel processing equipment |
| CN109510171A (en) * | 2018-11-16 | 2019-03-22 | 浙江特晟智能科技有限公司 | Downstairs system on a kind of electric motor protective device and hanger with motor protective circuit |
| CN109510171B (en) * | 2018-11-16 | 2023-10-10 | 浙江特晟智能科技有限公司 | Motor protection device with motor protection circuit and hanging bracket upstairs and downstairs system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20190526 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |