CN2242382Y

CN2242382Y - Device for controlling ash-releasing-gate of dewater chamber

Info

Publication number: CN2242382Y
Application number: CN 95234389
Authority: CN
Inventors: 陈松灵
Original assignee: SIZHOU BOILER EQUIPMENT CO Ltd QINGDAO
Current assignee: Sizhou Electric Equipment Co., Ltd., Qingdao
Priority date: 1995-07-26
Filing date: 1995-07-26
Publication date: 1996-12-11
Anticipated expiration: 2005-07-26

Abstract

The utility model relates to a controller of an ash discharge strobe for a drainage bin, which is a device for controlling the switching and the sealing of the ash discharge strobe for the drainage bin of a power plant. The controller of the ash discharge strobe for the drainage bin comprises an air control box, an electric control cabinet, a sucker which establishes negative pressure for a seal ring, a negative pressure relay which can check whether the seal ring are in the state of negative pressure, wherein the air control box, the electric control cabinet, the sucker and the negative pressure relay are all communicated with the seal ring. Both the air control box and the electric cabinet are l controlled in the mode of two-way parallel connection. The utility model has the advantages that the high-reliability control of one way for operation and the other way for standby is realized, the utility model can not cause damage, such as, scratching, etc., to the seal ring, and the normal operation of the controller can not be influenced because some pneumatic or electrical device element is out of order.

Description

Drainage bin ash discharge gate controller

The utility model relates to a kind of equipment that the switch and the sealing of power plant's drainage bin ash discharge gate are controlled, and is a kind of drainage bin ash discharge gate controller specifically.

The major defect that existing drainage bin ash discharge gate control gear exists is can not produce negative pressure and safe self-locking function imperfection after the seal ring venting, and a certain element is when breaking down, The whole control device Control Failure influences the proper functioning of whole ash discharge gate.The ash-removing door action can seriously abrade seal ring when for example seal ring venting back can not be regained because of its elasticity weakens; End face is not sprayed water and is washed away the lime-ash function on the ash-removing door, can poor sealing when the seal ring gas-flow closure.

The utility model purpose is to overcome the shortcoming in the above-mentioned technology, proposes a kind of drainage bin ash discharge gate controller, sets up producing negative pressure and perfect safe self-locking control function and two-way pneumoelectric control in parallel function after the seal ring venting immediately.Ash-removing door could move when guaranteeing to be in negative pressure in the seal ring, and the opened and ash-removing door of flush water could be inflated seal ring after having closed and having put in place.Two-way pneumoelectric control in parallel realizes one tunnel operation, one tunnel standby High-reliability Control, when arbitrary element breaks down, can out of servicely immediately overhaul, and does not influence the sealing of ash discharge gate and the proper functioning of switch.

The utility model purpose is realized by following technological scheme: this drainage bin ash discharge gate controller, include Pneumatic controlled box, electric control cubicle, be connected with ash-removing door and can detect ash-removing door and whether close the position limit switch that puts in place and a detection and whether discharge water and wash away the pressure relay of ash-removing door, the Pneumatic valve that control ash discharge gate opens and closes in Pneumatic controlled box is 2 parallel connections, for the Pneumatic valve of seal ring inflation and venting also is 2 parallel connections, and connect control with corresponding stop valve respectively, when any Pneumatic valve that breaks down withdraws from maintenance, and do not influence drainage bin ash discharge gate controller proper functioning.For the suction port of setting up the suction device of negative pressure after the venting of ash discharge gate seal ring immediately is connected on the gas circuit of source of the gas, relief opening leads to atmosphere, intakeport is connected on the gas circuit of seal ring valve cock, and the valve whether the detection seal ring sets up the negative pressure relay of negative pressure is connected to the intakeport of suction device on the gas circuit between the seal ring valve cock.

Suction device has a suction port and a relief opening, and the high velocity air in the throat between intakeport and suction port and the relief opening is communicated with.When in the needs suctions seal ring during gas, there is air to flow into from the suction device suction port, discharge by relief opening, throat in the centre is a nozzle, form high velocity air, produce low pressure, can with seal ring that it is communicated with in gas pumping come out, make seal ring inside be in negative pressure state, shrink in the annular groove of ash-discharge opening lower end surface.There are a negative pressure chamber and valve in the eardrum top of negative pressure relay, connects a rank circle and 2 contacts downwards from the eardrum center, and contact is positioned at rank circle top, and has the gap between the rank circle, and the rank circle is with the epirelief and recessed the moving up and down of eardrum.The valve of negative pressure relay top is connected on the gas circuit of suction device intakeport.When seal ring inside is in negative pressure, the negative pressure chamber of negative pressure relay also is in negative pressure state, its eardrum moves upward under suction function, drive armature moves upward, when armature contacted with contact, the negative pressure relay sent signal, and signal passes to the control electric control cubicle, electric control cubicle control Pneumatic controlled box, Pneumatic controlled box is controlled the ash-removing door cylinder and is allowed the ash discharge gate open or close.If seal ring is not exitted, there is certain pressure inside, and the negative pressure relay can not move, and ash-removing door also is failure to actuate, can be under the situation that the seal ring inflation is heaved, because the action of ash-removing door causes the scratch of seal ring.

The utility model has the advantages that because the two-way control valve is adopted in seal ring inflation and venting, closing and opening and also adopt the two-way control valve ash-removing door, realize one tunnel operation, one tunnel standby High-reliability Control, when arbitrary element breaks down, can be out of service immediately, overhaul, and do not influence the sealing of ash discharge gate and the proper functioning of switch.In the time of guaranteeing to be in negative pressure in the seal ring, ash-removing door could open and close action, after the opened and ash-removing door when flush water but close puts in place, could inflate seal ring.Can not cause injuries such as scratch to seal ring.

Embodiment of accompanying drawings:

Fig. 1 is the Pneumatic controlled box structural drawing of drainage bin ash discharge gate controller,

Fig. 2 is the suction device structural drawing,

Fig. 3 is negative pressure relay construction figure,

Fig. 4 is a drainage bin ash discharge gate controller pneumatic schematic diagram.

This drainage bin ash discharge gate controller has one to be connected and can to detect ash-removing door whether close the position limit switch (3) that puts in place with ash-removing door (2), select LX2-131 type switch for use, pressure relay (23) is selected D502/7D type relay for use, what be connected with ash-removing door (2) controls road control valve (11) and two road control valves (9) that ash-removing door (2) is closed in addition, is connected in parallel; Road control valve (12) and two road control valves (10) that control ash-removing door (2) is opened are connected in parallel, each personal valve control.The suction device (4) that helps seal ring to set up negative pressure has suction port (15), relief opening (16) and intakeport (17), high velocity air in the middle of intakeport (17) and suction port (15) relief opening (16) in the throat communicates, and intakeport (17) communicates with the valve cock of seal ring (1); There are negative pressure chamber (22) and valve (21) in eardrum (18) top of detecting the negative pressure relay (6) that whether is in negative pressure in the seal ring, and eardrum (18) below is connected with rank circle (20) and contact (19) valve (21) is connected in leading on the gas circuit of suction device (4) intakeport (17).When seal ring inside is in negative pressure, the negative pressure chamber (22) of negative pressure relay (6) also is in negative pressure state, its eardrum (18) moves upward under suction function, driving rank circle (20) moves upward, when rank circle (20) and contact (19) when contacting, negative pressure relay (6) sends signal, passes to control system, at this moment cylinder drive ash-removing door (2) opens or closes, and carries out ash discharge.Gassy in seal ring (1) is not a negative pressure state, and negative pressure relay (6) is failure to actuate, and ash-removing door (2) also is failure to actuate, and therefore can not cause seal ring (1) by ash-removing door scratch phenomenon.To what seal ring was inflated road control valve (14) and two road control valves (7) are arranged, road control valve (13) and two road control valves (8) are arranged what seal ring was exitted.Owing to realize the two-way parallel connection, one tunnel operation, one tunnel standby High-reliability Control when arbitrary element breaks down, can withdraw from immediately and overhaul, and not influence proper functioning.

Claims

1, a kind of drainage bin ash discharge gate controller, include Pneumatic controlled box, electric control cubicle, be connected with ash-removing door and can detect ash-removing door and whether close the position limit switch that puts in place and a detection and whether discharge water and wash away the pressure relay of ash-removing door, it is characterized in that in Pneumatic controlled box, the Pneumatic valve that control ash discharge gate opens and closes is 2 parallel connections, for the Pneumatic valve of seal ring inflation and venting also is 2 parallel connections, and connect control with corresponding stop valve respectively, for the suction port of setting up the suction device of negative pressure after the venting of ash discharge gate seal ring is immediately connected in leading on the gas circuit of source of the gas, relief opening leads to atmosphere, intakeport is connected on the gas circuit of seal ring valve cock, and the valve whether the detection seal ring sets up the negative pressure relay of negative pressure is connected to the intakeport of suction device on the gas circuit between the seal ring valve cock.

2, according to the described drainage bin ash discharge of claim 1 gate controller, it is characterized in that suction device has a suction port and a relief opening, the high velocity air in the throat in the middle of intakeport and suction port and the relief opening is communicated with.

3, according to the described drainage bin ash discharge of claim 1 gate controller, there are a negative pressure chamber and valve in the eardrum top that it is characterized in that the negative pressure relay, connect a rank circle and 2 contacts downwards from the eardrum center, contact is positioned at rank circle top, and there is the gap between the rank circle, the rank circle is with the epirelief and recessed the moving up and down of eardrum, and air absorbing mouth is connected on the gas circuit of suction device intakeport.