CN209640735U - A kind of refuse-burning plant percolate pit level automatic control circuit - Google Patents
A kind of refuse-burning plant percolate pit level automatic control circuit Download PDFInfo
- Publication number
- CN209640735U CN209640735U CN201920596250.4U CN201920596250U CN209640735U CN 209640735 U CN209640735 U CN 209640735U CN 201920596250 U CN201920596250 U CN 201920596250U CN 209640735 U CN209640735 U CN 209640735U
- Authority
- CN
- China
- Prior art keywords
- normally opened
- intermediate relay
- opened contact
- coil
- relay
- 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.)
- Active
Links
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
A kind of refuse-burning plant percolate pit level automatic control circuit, is related to control circuit technical field.Including by power firestreak L, zero curve N, start button SB1, stop button SB2, intermediate relay KA1, KA2, KA3, KA4, KA5, KA6, KA6, KA7, low low liquid level switch LSLL, low liquid level switch LSL, middle liquid-level switch LSM, high level switch LSH, first delivery pump control contactor KM1, the control system start-up circuit of second delivery pump control contactor KM2 composition, low low liquid level repeat circuit, low liquid level repeat circuit, middle liquid level repeat circuit, high liquid level repeat circuit, single pump control circuit, double pump control circuit, first conveying pump control circuit, second conveying pump control circuit.The liquid level that the utility model can be percolated liquid pool to garbage power plant carries out effective automation control, is not necessarily to manual control, cost of labor is greatly saved and made work is avoided to make mistakes.
Description
Technical field
The utility model relates to control circuit technical field, specially a kind of refuse-burning plant percolating fluid pit level is controlled automatically
Circuit processed.
Background technique
In garbage power plant dump pit percolate mainly as rubbish itself is aqueous and refuse biochemical reaction caused by, rubbish
Rubbish in rubbish power plant dump pit is all the fermentation of certain time to be passed through, wherein how much having for rubbish fermentation of percolate
Very big influence, all liquid levels that percolate is controlled in garbage power plant.
Utility model content
The purpose of the utility model is to provide a kind of refuse-burning plant percolate pit level automatic control circuits, can be effective
Solve the problems in background technique.
Realizing the technical solution of above-mentioned purpose is: a kind of refuse-burning plant percolate pit level automatic control circuit, special
Sign is: including power firestreak L, zero curve N, start button SB1, stop button SB2, intermediate relay KA1, KA2, KA3, KA4,
KA5, KA6, KA6, KA7, low low liquid level switch LSLL, low liquid level switch LSL, middle liquid-level switch LSM, high level switch LSH,
One delivery pump control contactor KM1, the second delivery pump control contactor KM2；
Be connected between the firewire L and zero curve N of the power supply start button SB1 being serially connected, stop button SB2, in
Between relay KA1 coil formed control system start-up circuit, the both ends of start button SB1 are parallel with intermediate relay KA1's
Normally opened contact KA1-1；
The end firewire L of power supply is also connected with the normally opened contact of the intermediate relay KA1 in parallel with control system start-up circuit
KA1-2；
The low low liquid level switch mutually concatenated is also connected between the output end of the normally opened contact KA1-2 and zero curve N
The coil of LSLL and intermediate relay KA2 forms low low liquid level repeat circuit；The output end of normally opened contact KA1-2 and zero curve N it
Between be also connected with the low liquid level switch LSL and intermediate relay KA3 mutually concatenated coil formed low liquid level repeat circuit；It is described
The middle liquid-level switch LSM and intermediate relay KA4 mutually concatenated is connected between the output end of normally opened contact KA1-2 and zero curve N
Coil form middle liquid level repeat circuit；Mutual concatenate is also connected between the output end of the normally opened contact KA1-2 and zero curve N
High level switch LSH and intermediate relay KA5 coil formed high liquid level repeat circuit；
It is also connected with the intermediate relay KA2's being sequentially connected in series between the output end and zero curve N of the normally opened contact KA1-2
Normally opened contact KA2-1, the normally opened contact KA4-1 of intermediate relay KA4, the normally opened contact KA3-1 of intermediate relay KA3 and centre
The coil of relay KA6 forms single pump control circuit, the both ends normally opened contact KA4-1 of intermediate relay KA4 be parallel with it is intermediate after
The normally opened contact KA6-1 of electric KA6；
Also be serially connected between the output end and zero curve N of normally opened contact KA2-1 intermediate relay KA5 normally opened contact KA5-1,
The coil of the normally opened contact KA4-2 and intermediate relay KA7 of intermediate relay KA4 form double pump control circuit, intermediate relay
The both ends normally opened contact KA5-1 of KA5 are parallel with the normally opened contact KA7-1 of intermediate relay KA7；
It is also connected with the intermediate relay KA7's mutually concatenated between the output end of the normally opened contact KA1-2 and zero curve N
The coil of normally opened contact KA7-3 and the first delivery pump control contactor KM1 form the first conveying pump control circuit, normally opened contact
The both ends of KA7-3 are parallel with the normally opened contact KA6-3 of intermediate relay KA6；The output end and zero curve of the normally opened contact KA1-2
The normally opened contact KA7-4 and the second delivery pump control contactor KM2 of the intermediate relay KA7 mutually concatenated are also connected between N
Coil formed second conveying pump control circuit.
Further, automatic control circuit further includes time relay KT1, KT2, intermediate relay KA8, intermediate relay
The delay break contact of the normally opened contact KA6-2 of KA6, the normally-closed contact KA7-2 of intermediate relay KA7, time relay KT2
KT2-1, time relay KT1 coil be sequentially connected in series and be connected between the output end of normally opened contact KA1-2 and zero curve N and formed
First delivery pump delay control circuit；The time mutually concatenated is also connected between the output end of normally-closed contact KA7-2 and zero curve N
The timing closing contact KT1-1 of relay KT1, the coil of time relay KT2 form the second delivery pump delay control circuit, in
Between relay KA8 coils from parallel connection of coils at the coil both ends of time relay KT2；
After the normally opened contact KA8-1 of the normally opened contact KA6-3 and intermediate relay KA8 of intermediate relay KA6 are mutually concatenated
It is connected in parallel on the both ends normally opened contact KA7-3 of intermediate relay KA7, the normally opened contact KA6-4 of intermediate relay KA6 and intermediate relay
The normally opened contact KA8-2 of device KA8 is connected in parallel on the both ends normally opened contact KA7-4 of intermediate relay KA7 after mutually concatenating.
The utility model has the beneficial effects that
The liquid level that the utility model can be percolated liquid pool to garbage power plant carries out effective automation control, without artificial control
System, is greatly saved cost of labor and made work is avoided to make mistakes.
The utility model is controlled by starting quantity of the liquid-level switch to delivery pump, reaches effective Liquid level mesh
's.
The utility model realizes the automatic switchover between the first delivery pump and the second delivery pump using the time relay, significantly
Single pump continuous working period is reduced, the service life of delivery pump is increased.
Detailed description of the invention
Fig. 1 is the schematic diagram of first embodiment；
Fig. 2 is the schematic diagram of second embodiment；
Fig. 3 is the structural schematic diagram for being percolated liquid pool.
Specific embodiment
Present embodiment discloses a kind of refuse-burning plant percolate pit level automatic control circuits, are mainly used for control conveying
Percolate in the automatic extraction diafiltration liquid pool of pump.
The structure of liquid pool is percolated as shown in figure 3, including the first delivery pump 1, the second delivery pump 2, pond body 3, pond body 3 is interior under
It is sequentially installed with low low liquid level switch LSLL, low liquid level switch LSL, middle liquid-level switch LSM, high level switch LSH upwards, first
Delivery pump 1, the second delivery pump 2 input end connection pond body 3 in percolate.
First embodiment
As shown in Figure 1, a kind of refuse-burning plant percolate pit level automatic control circuit, including power firestreak L, zero curve N,
Start button SB1, stop button SB2, intermediate relay KA1, KA2, KA3, KA4, KA5, KA6, KA6, KA7, low low liquid level are opened
Close LSLL, low liquid level switch LSL, middle liquid-level switch LSM, high level switch LSH, the first delivery pump control contactor KM1, second
Delivery pump control contactor KM2, the first delivery pump control contactor KM1 are connect with the first delivery pump 1, and the control of the second delivery pump connects
Tentaculum KM2 is connect with the second delivery pump 2.
Be connected between the firewire L and zero curve N of the power supply start button SB1 being serially connected, stop button SB2, in
Between relay KA1 coil formed control system start-up circuit, the both ends of start button SB1 are parallel with intermediate relay KA1's
Normally opened contact KA1-1.
The end firewire L of power supply is also connected with the normally opened contact of the intermediate relay KA1 in parallel with control system start-up circuit
KA1-2。
The low low liquid level switch mutually concatenated is also connected between the output end of the normally opened contact KA1-2 and zero curve N
The coil of LSLL and intermediate relay KA2 forms low low liquid level repeat circuit；The output end of normally opened contact KA1-2 and zero curve N it
Between be also connected with the low liquid level switch LSL and intermediate relay KA3 mutually concatenated coil formed low liquid level repeat circuit；It is described
The middle liquid-level switch LSM and intermediate relay mutually concatenated is also connected between the output end of normally opened contact KA1-2 and zero curve N
The coil of KA4 forms middle liquid level repeat circuit；It is also connected between the output end and zero curve N of the normally opened contact KA1-2 mutually
The coil of the high level switch LSH and intermediate relay KA5 of concatenation form high liquid level repeat circuit.
It is also connected with the intermediate relay KA2's being sequentially connected in series between the output end and zero curve N of the normally opened contact KA1-2
Normally opened contact KA2-1, the normally opened contact KA4-1 of intermediate relay KA4, the normally opened contact KA3-1 of intermediate relay KA3 and centre
The coil of relay KA6 forms single pump control circuit, the both ends normally opened contact KA4-1 of intermediate relay KA4 be parallel with it is intermediate after
The normally opened contact KA6-1 of electric KA6.
Also be serially connected between the output end and zero curve N of normally opened contact KA2-1 intermediate relay KA5 normally opened contact KA5-1,
The coil of the normally opened contact KA4-2 and intermediate relay KA7 of intermediate relay KA4 form double pump control circuit, intermediate relay
The both ends normally opened contact KA5-1 of KA5 are parallel with the normally opened contact KA7-1 of intermediate relay KA7.
It is also connected with the intermediate relay KA7's mutually concatenated between the output end of the normally opened contact KA1-2 and zero curve N
The coil of normally opened contact KA7-3 and the first delivery pump control contactor KM1 form the first conveying pump control circuit, normally opened contact
The both ends of KA7-3 are parallel with the normally opened contact KA6-3 of intermediate relay KA6；The output end and zero curve of the normally opened contact KA1-2
The normally opened contact KA7-4 and the second delivery pump control contactor KM2 of the intermediate relay KA7 mutually concatenated are also connected between N
Coil formed second conveying pump control circuit.
The working principle of the present embodiment:
Start button SB1 is pressed, the normally opened contact KA1-1 of intermediate relay KA1 is closed to form self-insurance, intermediate relay
The normally opened contact KA1-2 of KA1 is closed.
When liquid-level switch LSM senses liquid level signal in the middle, low low liquid level switch LSLL, low liquid level switch LSL, middle liquid level
Switch LSM is closed, intermediate relay K2, intermediate relay K3, intermediate relay K4 coil respectively electric, intermediate relay
The normally opened contact K2-1 of K2, the normally opened contact K3-1 of intermediate relay K3, intermediate relay K4 normally opened contact K4-1, K4-2 close
It closes, the coil of intermediate relay K6 obtains electric, and the normally opened contact K6-1 of intermediate relay K6 is closed to form self-insurance, normally opened contact K6-3
Closure, the coil of the first delivery pump control contactor KM1 obtain electric, the first delivery pump 1 of starting.
When high level switch LSH senses liquid level signal, the normally opened contact K5-1 of intermediate relay K5 is closed, it is intermediate after
The coil of electric appliance K7 obtains electric, and the normally opened contact K7-1 of intermediate relay K7 is closed and to form self-insurance, normally opened contact K7-3, K7-4 are closed
Close, the first delivery pump control contactor KM1, the second delivery pump control contactor KM2 coil simultaneously it is electric, the first delivery pump 1,
Second delivery pump 2 starts simultaneously, achievees the purpose that quickly to reduce liquid level.
When liquid level is lower than high level switch LSH, the coil losing electricity of intermediate relay K5, the normally opened touching of intermediate relay K5
Point K1-1 is disconnected, and the coil losing electricity of the second delivery pump control contactor KM2, the second delivery pump 2 stops working.
When liquid level is lower than middle liquid-level switch LSM, the coil losing electricity of intermediate relay K4, the normally opened touching of intermediate relay K4
Point K4-1 is disconnected, and the coil losing electricity of the first delivery pump control contactor KM1, the first delivery pump 1 stops working.
Second embodiment
The circuit theory of second embodiment and first embodiment is essentially identical, and difference is: when second embodiment further includes
Between relay KT1, KT2, intermediate relay KA8, the normally opened contact KA6-2 of intermediate relay KA6, intermediate relay KA7 it is normal
Closed contact KA7-2, the delay break contact KT2-1 of time relay KT2, time relay KT1 coil be sequentially connected in series and connect
It connects and forms the first delivery pump delay control circuit between the output end and zero curve N of normally opened contact KA1-2；Normally-closed contact KA7-2
Output end and zero curve N between be also connected with the timing closing contact KT1-1 of the time relay KT1 mutually concatenated, the time after
The coil of electric appliance KT2 forms the second delivery pump delay control circuit, and the coils from parallel connection of coils of intermediate relay KA8 is in the time relay
The coil both ends of KT2；
After the normally opened contact KA8-1 of the normally opened contact KA6-3 and intermediate relay KA8 of intermediate relay KA6 are mutually concatenated
It is connected in parallel on the both ends normally opened contact KA7-3 of intermediate relay KA7, the normally opened contact KA6-4 of intermediate relay KA6 and intermediate relay
The normally opened contact KA8-2 of device KA8 is connected in parallel on the both ends normally opened contact KA7-4 of intermediate relay KA7 after mutually concatenating.
The working principle of the present embodiment:
When liquid-level switch LSM senses liquid level signal in the middle, the coil of intermediate relay KA6 obtains electric, intermediate relay KA6
Normally opened contact KA6-1 be closed to form self-insurance, normally opened contact KA6-2, K6-3, K6-4 closure, the coil of time relay KT1 obtains
Electricity, the coil of the first delivery pump control contactor KM1 obtain electric, the first delivery pump 1 of starting.
After the delay time (the present embodiment is set as 6 hours) of time relay KT1 reaches, time relay KT1's
Timing closing contact KT1-1 closure, time relay KT2, intermediate relay KA8 coil obtain electric, intermediate relay KA8's is normal
Closed contact KA8-1 is disconnected, normally opened contact KA8-2 is closed, the coil losing electricity of the first delivery pump control contactor KM1, the first conveying
Pump 1 stops working, and the coil of the second delivery pump control contactor KM1 obtains electric, switches to the start-up operation of the second delivery pump 2.
After the delay time (the present embodiment is set as 6 hours) of time relay KT2 reaches, time relay KT2's
The break contact KT2-1 that is delayed is disconnected, the coil losing electricity of time relay KT1, the timing closing contact KT1- of time relay KT1
1 contact disconnects, the coil losing electricity of time relay KT2, intermediate relay KA8, the normally-closed contact KA8-1 of intermediate relay KA8
Closure, normally opened contact KA8-2 are disconnected, then are worked from the first delivery pump 1 is newly switched to.
The delay break contact KT2-1 closure of time relay KT2 simultaneously, the coil of time relay KT1 obtains electric, again
Timing moves in circles.
When high level switch LSH senses liquid level signal, the coil of intermediate relay KA7 obtains electric, intermediate relay KA7
Normally-closed contact KA7-2 disconnect, the coil losing electricity of time relay KT1, KT2, intermediate relay KA8, intermediate relay KA7's
Normally opened contact KA7-3, KA7-4 closure, the coil of the first delivery pump control contactor KM1, the second delivery pump control contactor KM2
Simultaneously must be electric, the first delivery pump 1, the second delivery pump 2 start simultaneously, achieve the purpose that quickly to reduce liquid level.
Claims (2)
1. a kind of refuse-burning plant percolate pit level automatic control circuit, it is characterised in that: including power firestreak L, zero curve N,
Start button SB1, stop button SB2, intermediate relay KA1, KA2, KA3, KA4, KA5, KA6, KA6, KA7, low low liquid level are opened
Close LSLL, low liquid level switch LSL, middle liquid-level switch LSM, high level switch LSH, the first delivery pump control contactor KM1, second
Delivery pump control contactor KM2；
Be connected between the firewire L and zero curve N of the power supply start button SB1 being serially connected, stop button SB2, it is intermediate after
The coil of electric appliance KA1 forms control system start-up circuit, and the both ends of start button SB1 are parallel with the normally opened of intermediate relay KA1
Contact KA1-1；
The end firewire L of power supply is also connected with the normally opened contact KA1- of the intermediate relay KA1 in parallel with control system start-up circuit
2；
Be also connected between the output end of the normally opened contact KA1-2 and zero curve N the low low liquid level switch LSLL that mutually concatenates with
The coil of intermediate relay KA2 forms low low liquid level repeat circuit；Also connect between the output end and zero curve N of normally opened contact KA1-2
The coil for being connected to the low liquid level switch LSL and intermediate relay KA3 mutually concatenated forms low liquid level repeat circuit；The normally opened touching
The coil of middle the liquid-level switch LSM and intermediate relay KA4 that mutually concatenate are connected between the output end of point KA1-2 and zero curve N
Liquid level repeat circuit in formation；The high liquid mutually concatenated is also connected between the output end of the normally opened contact KA1-2 and zero curve N
The coil of bit switch LSH and intermediate relay KA5 forms high liquid level repeat circuit；
The normally opened of the intermediate relay KA2 being sequentially connected in series is also connected between the output end and zero curve N of the normally opened contact KA1-2
Contact KA2-1, the normally opened contact KA4-1 of intermediate relay KA4, the normally opened contact KA3-1 of intermediate relay KA3 and intermediate relay
The coil of device KA6 forms single pump control circuit, and the both ends normally opened contact KA4-1 of intermediate relay KA4 are parallel with intermediate relay KA6
Normally opened contact KA6-1；
Normally opened contact KA5-1, the centre of intermediate relay KA5 are also serially connected between the output end and zero curve N of normally opened contact KA2-1
The coil of the normally opened contact KA4-2 and intermediate relay KA7 of relay KA4 form double pump control circuit, intermediate relay KA5's
The both ends normally opened contact KA5-1 are parallel with the normally opened contact KA7-1 of intermediate relay KA7；
The normally opened of the intermediate relay KA7 mutually concatenated is also connected between the output end of the normally opened contact KA1-2 and zero curve N
The coil of contact KA7-3 and the first delivery pump control contactor KM1 form the first conveying pump control circuit, normally opened contact KA7-3
Both ends be parallel with the normally opened contact KA6-3 of intermediate relay KA6；Between the output end and zero curve N of the normally opened contact KA1-2
It is also connected with the coil of the normally opened contact KA7-4 and the second delivery pump control contactor KM2 of the intermediate relay KA7 mutually concatenated
Form the second conveying pump control circuit.
2. a kind of refuse-burning plant percolate pit level automatic control circuit according to claim 1, it is characterised in that: from
Dynamic control circuit further includes time relay KT1, KT2, intermediate relay KA8, the normally opened contact KA6-2 of intermediate relay KA6,
The normally-closed contact KA7-2 of intermediate relay KA7, the delay break contact KT2-1 of time relay KT2, time relay KT1
Coil, which is sequentially connected in series and is connected between the output end of normally opened contact KA1-2 and zero curve N, forms the first delivery pump delays time to control electricity
Road；The timing closing of the time relay KT1 mutually concatenated is also connected between the output end of normally-closed contact KA7-2 and zero curve N
Coil the second delivery pump delay control circuit of formation of contact KT1-1, time relay KT2, the coil of intermediate relay KA8 is simultaneously
It is associated in the coil both ends of time relay KT2；
The normally opened contact KA8-1 of the normally opened contact KA6-3 and intermediate relay KA8 of intermediate relay KA6 are in parallel after mutually concatenating
At the both ends normally opened contact KA7-3 of intermediate relay KA7, the normally opened contact KA6-4 and intermediate relay of intermediate relay KA6
The normally opened contact KA8-2 of KA8 is connected in parallel on the both ends normally opened contact KA7-4 of intermediate relay KA7 after mutually concatenating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920596250.4U CN209640735U (en) | 2019-04-28 | 2019-04-28 | A kind of refuse-burning plant percolate pit level automatic control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920596250.4U CN209640735U (en) | 2019-04-28 | 2019-04-28 | A kind of refuse-burning plant percolate pit level automatic control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209640735U true CN209640735U (en) | 2019-11-15 |
Family
ID=68497949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920596250.4U Active CN209640735U (en) | 2019-04-28 | 2019-04-28 | A kind of refuse-burning plant percolate pit level automatic control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209640735U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111459195A (en) * | 2020-04-08 | 2020-07-28 | 北京京城环保股份有限公司 | Liquid level measurement control device and method for waste incineration slag discharging machine |
| CN113741564A (en) * | 2021-09-14 | 2021-12-03 | 国网四川省电力公司检修公司 | Liquid level monitoring control system of sewage collecting tank |
-
2019
- 2019-04-28 CN CN201920596250.4U patent/CN209640735U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111459195A (en) * | 2020-04-08 | 2020-07-28 | 北京京城环保股份有限公司 | Liquid level measurement control device and method for waste incineration slag discharging machine |
| CN113741564A (en) * | 2021-09-14 | 2021-12-03 | 国网四川省电力公司检修公司 | Liquid level monitoring control system of sewage collecting tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209640735U (en) | A kind of refuse-burning plant percolate pit level automatic control circuit | |
| CN206684589U (en) | A kind of deodorizing tower liquid automatic control circuit | |
| CN105545763B (en) | Pressure of supply water tank remote control and control method | |
| CN108189208A (en) | A kind of prefabricated case beam automatic spray curing means | |
| CN201267757Y (en) | Timing and automatic flushing device for filter membrane | |
| CN201294471Y (en) | Delay circuit for leather belt motor startup | |
| CN201236381Y (en) | Municipal drainage pump station collecting well fluid level control energy-saving apparatus | |
| CN202023975U (en) | Double-layer cinder valve control system | |
| CN205115915U (en) | Spreader control system of coating machine | |
| CN204610224U (en) | For the switching control of two water pumps of building secondary water-supply | |
| CN208569347U (en) | A kind of control cabinet on-off control system | |
| CN202201471U (en) | Automatic discharger for materials of blending bin | |
| CN204360172U (en) | Large-scale automatic centrifugation ore separators PLC control system | |
| CN208414049U (en) | Car wash water Full automatic purifying device | |
| CN201786628U (en) | Manual automatic pumping controller | |
| CN201736349U (en) | Automatic controller for concrete-mixing lifter | |
| CN202327304U (en) | On-off controller of blowdown valve | |
| CN201251699Y (en) | Curtain controller | |
| CN207557739U (en) | A kind of control system of the power station wastewater treatment based on PLC controller | |
| CN201903603U (en) | Automatic calibrating and detecting device for connector | |
| CN201399271Y (en) | Oil extraction sewage treatment dosing pump controller | |
| CN201407159Y (en) | Automatic agitating reversion control mechanism in concrete conveying pump | |
| CN201252510Y (en) | Star-delta reduced-voltage starting control circuit | |
| CN202472277U (en) | Automatic control device of grating machine | |
| CN215633835U (en) | Control loop for realizing automatic water injection starting of self-suction type sewage pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |