CN219595936U - Intermittent automatic defoaming device and control circuit thereof - Google Patents

Abstract

The utility model discloses an intermittent automatic defoaming device and a control circuit thereof, wherein the intermittent automatic defoaming device comprises a grating sensor, a delivery pump, a spray header and a circulating time relay; the grating sensor is arranged above the liquid level and is used for detecting foam; the conveying pump is started according to the detection result of the grating sensor and is used for conveying the defoaming mixture to the spray header; the spray header is arranged above the foam and is used for spraying the defoaming mixture; the circulating time relay is used for stopping the delivery pump when the set time is reached or restarting the delivery pump when the set time grating sensor detects foam. The utility model realizes intermittent full-automatic elimination of foam by the cooperation of the grating sensor and the circulating time relay, and can effectively reduce the labor cost and the energy consumption cost of the occasion where the foam overflows intermittently.

Description

Intermittent automatic defoaming device and control circuit thereof

Technical Field

The utility model relates to the technical field of foam eliminating equipment, in particular to an intermittent automatic defoaming device and a control circuit thereof.

Background

After landfill of a garbage treatment plant, percolate flows out, foam can be intermittently generated in the process that the percolate flows from a culvert pipe of a landfill pile body to a regulating tank, more foam can be generated in rainy days, the buffer tank between the culvert pipe and the regulating tank is at risk of overflowing, environmental risk occurs, and defoaming agent is sprayed at a tank opening to perform defoaming treatment manually and irregularly. In order to reduce labor cost, technicians developed defoaming treatment devices, such as a Chinese patent with publication number of CN210795841U, a foam interception net and a foam scraping plate are arranged in a sewage tank, a spray header is arranged above the sewage tank, after foam overflows the foam interception net, foam is swept into a buffer tank along a pipeline through the horizontal direction of the electric foam scraping plate to move back and forth, sewage in the buffer tank is pumped into the spray header by a circulating pump, and foam in the sewage tank is sprayed and defoamed. The foam scraping plate and the circulating pump continuously run for 24 hours, and the risk of foam overflowing from the tank mouth is solved, but unnecessary energy consumption and treatment cost are increased for the place where foam intermittently overflows.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing an intermittent automatic defoaming device with simple structure, stable operation and difficult interference and a control circuit thereof.

In order to solve the technical problems, the utility model adopts the following technical scheme:

an intermittent automatic defoaming device comprises a grating sensor, a delivery pump, a spray header and a circulating time relay; the grating sensor is arranged above the liquid level and is used for detecting foam; the conveying pump is started according to the detection result of the grating sensor and is used for conveying the defoaming mixture to the spray header; the spray header is arranged above the foam and is used for spraying the defoaming mixture; the circulating time relay is used for stopping the delivery pump when the set time is reached or restarting the delivery pump when the set time grating sensor detects foam.

In the intermittent automatic defoaming device, preferably, the grating sensor is an infrared grating sensor.

In the intermittent automatic defoaming device, preferably, the grating sensor is installed at the upper part of the inner side wall of the to-be-defoamed tank.

In the intermittent automatic defoaming device, preferably, at least two grating sensors are respectively arranged at the same height of different side walls.

In the intermittent automatic defoaming device, preferably, the spray header is arranged on the spray pipe, and the spray pipe is arranged above the to-be-defoamed pond in a grid shape.

In the intermittent automatic defoaming device, preferably, the spray pipe is installed above the to-be-defoamed pond through a bracket.

In the intermittent automatic defoaming device, preferably, the spray pipe is connected with the conveying pump through a conveying hose.

In the intermittent automatic defoaming device, preferably, the grating sensor is an infrared grating sensor.

The utility model also provides a control circuit of the intermittent automatic defoaming device, which comprises a first branch and a second branch, wherein the first branch is used for connecting a conveying pump with a power supply, a contactor used for connecting or disconnecting the conveying pump is arranged on the first branch, the second branch is used for controlling the conveying pump to start or stop according to set time, the second branch comprises a third branch, a fourth branch and a fifth branch which are connected in parallel, the third branch is provided with a normally closed contact used for controlling a circulating time relay, the fourth branch is sequentially connected with a rotary switch, a grating sensor and the circulating time relay in series, and the fifth branch is connected with a normally open contact used for controlling the circulating time relay.

In the control circuit of the intermittent automatic defoaming device, preferably, a control loop fuse and an operation indicator lamp are connected to the main line of the second branch.

In the control circuit of the intermittent automatic defoaming device, preferably, the third branch is provided with a stop indicator lamp, and the stop indicator lamp is connected in series with the normally closed contact.

Compared with the prior art, the utility model has the advantages that:

(1) According to the intermittent automatic defoaming device, after the position of foam is detected by the grating sensor, the spraying assembly is started to perform defoaming, then the spraying assembly is closed according to the set time by the time relay, and then the spraying assembly is started, so that intermittent full-automatic defoaming is realized, the labor cost of the occasion where foam overflows intermittently can be effectively reduced, and the energy consumption cost is reduced.

(2) The utility model has the advantages that the infrared grating adopted by the intermittent automatic defoaming device has simple structure and stable operation, and the sensing medium is infrared rays and is not influenced by the surrounding environment. The time relay is matched, the delivery pump is stopped in time, excessive medicament addition caused when the operation time of the delivery pump is too long is avoided, and the aim of saving energy is achieved.

Drawings

Fig. 1 is a schematic diagram of the intermittent automatic defoaming device in example 1 of the present utility model.

Fig. 2 is an electrical schematic diagram of the intermittent automatic defoaming device in embodiment 1 of the present utility model.

Legend description: 1. a grating sensor; 2. a transfer pump; 3. a spray header; 4. a cyclic time relay; 5. a defoaming pool; 6. a shower pipe; 7. a bracket; 8. a conveying hose; 9. a culvert pipe; 10. a defoaming agent container.

Detailed Description

The utility model is described in further detail below with reference to the drawings and specific examples of the specification.

Example 1:

FIG. 1 shows an intermittent automatic defoaming device of the present utility model, comprising a grating sensor 1, a delivery pump 2, a spray header 3 and a circulating time relay 4; the grating sensor 1 is arranged above the liquid level and is used for detecting foam; the delivery pump 2 is started according to the detection result of the grating sensor 1, and the delivery pump 2 is used for delivering the defoaming mixture to the spray header 3; the spray header 3 is arranged above the foam and is used for spraying the defoaming mixture; the circulation time relay 4 is used to stop the transfer pump 2 when a set time is reached or to restart the transfer pump 2 when the set time grating sensor 1 detects a foam. The embodiment utilizes the mutual matching of the grating sensor 1 and the circulating time relay 4 to realize the full-automatic intermittent foam elimination without manual control, greatly reduces the energy consumption and the cost and is not limited by the environment.

The specific working process of the intermittent automatic defoaming device in this embodiment is described by taking a buffer tank into which landfill leachate flows as an example: when landfill leachate flows to a buffer pool (namely a pool 5 to be defoamed) through a culvert pipe 9 in a landfill stack body, bubbling is started, when the foam height reaches a position which can be detected by a grating sensor 1, the grating sensor 1 is triggered, then a conveying pump 2 is started, foam is eliminated by spraying a defoaming mixture into the pool through a spray header 3, the conveying pump 2 is disconnected by a normally closed point of a circulating time relay 4 after running for a period of time, the conveying pump 2 is stopped, and then a normally open point of the circulating time relay 4 is closed after a period of time, if the grating sensor 1 is in a triggering state, the conveying pump 2 is started to reciprocate until the grating sensor 1 is not triggered, the circulating time relay 4 is disconnected and stopped, and the time for opening and closing the circulating time relay 4 can be freely set according to practical experience.

In the embodiment, the grating sensor 1 is an infrared grating sensor, and the infrared grating sensor has the advantages of being stable and reliable due to small external interference.

In this embodiment, the grating sensor 1 is installed at the upper portion of the inner side wall of the tank 5 to be defoamed.

In this embodiment, the grating sensors 1 are at least two, set up the same height at different lateral walls, and this embodiment sets up two grating sensors 1 according to the size of buffer pool pond face respectively at the inside wall that the cell body is relative, makes the detection dead angle free, more accurate in time.

In this embodiment, shower head 3 sets up on shower 6, and shower 6 is latticed arranging in the top of waiting to defoaming pond 5, and the defoaming agent can cover whole pond face fast when making to spray, and defoaming effect is better.

In this embodiment, the shower pipe 6 is installed above the tank 5 to be defoamed by a bracket 7.

In this embodiment, the shower pipe 6 is connected to the delivery pump 2 through the delivery hose 8, and the delivery pump 2 is connected to the defoaming agent container 10 through the delivery hose 8, so that the hose connection is convenient for installation.

As shown in fig. 2, the control circuit of the intermittent automatic defoaming device of this embodiment includes a first branch and a second branch, where the first branch is used to connect the conveying pump 2 with a power supply, the first branch is provided with a contactor KM for making the conveying pump on or off, the second branch is used to control the conveying pump 2 to start or stop according to a set time, the second branch includes a third branch, a fourth branch and a fifth branch connected in parallel, the third branch is provided with a normally closed contact KM/NC for controlling the circulating time relay 4, the fourth branch is sequentially connected with a rotary switch SA, a grating sensor 1 and the circulating time relay 4 in series, and the fifth branch is connected with a normally open contact KM/NO for controlling the circulating time relay 4.

In this embodiment, a control loop fuse FU and an operation indicator lamp HL1 are connected to the main line of the second branch.

In this embodiment, a stop indicator lamp HL2 is provided on the third branch, and the stop indicator lamp HL2 is connected in series with the normally closed contact KM/NC.

The intelligent control system comprises a power switch QF1, a contactor KM of a conveying pump 2, a control loop fuse FU, an operation indicator lamp HL1, a stop indicator lamp HL2, a rotary switch SA, an infrared grating B16 and a circulating time relay 4.

The electrical working principle of the intermittent automatic defoaming device of the embodiment is as follows:

when the QF1 power switch is closed, the defoaming device is put into normal use, and when the SA rotates to be automatic, the device enters automatic defoaming work. Specifically, when foam in the tank floats to an infrared grating detection point, infrared rays are blocked by the foam, a B16 grating alarms, a KT circulation type time relay 4 is electrified to run, the KT is set for a time, KM is switched on, a conveying pump 2 is started to start defoaming, when the foam in the tank descends below the grating detection point, the infrared rays are switched on, the B16 stops to alarm and turns off a KT power supply, KM is switched off, the conveying pump 2 stops running, and thus the intermittent circulation automatic defoaming aim is achieved.

While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the utility model. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims (10)

1. An intermittent automatic defoaming device is characterized in that: the device comprises a grating sensor (1), a delivery pump (2), a spray header (3) and a circulating time relay (4); the grating sensor (1) is arranged above the liquid level and is used for detecting foam; the delivery pump (2) is started according to the detection result of the grating sensor (1), and the delivery pump (2) is used for delivering the defoaming mixture to the spray header (3); the spray header (3) is arranged above the foam and is used for spraying the defoaming mixture; the circulating time relay (4) is used for stopping the delivery pump (2) when the set time is reached or restarting the delivery pump (2) when the set time grating sensor (1) detects foam.

2. The intermittent automatic defoaming device according to claim 1, wherein: the grating sensor (1) is an infrared grating sensor.

3. The intermittent automatic defoaming device according to claim 2, wherein: the grating sensor (1) is arranged at the upper part of the inner side wall of the tank (5) to be defoamed.

4. The intermittent automatic defoaming device according to claim 2, wherein: at least two grating sensors (1) are respectively arranged at the same height of different side walls.

5. The intermittent automatic defoaming device according to claim 4, wherein: the spray header (3) is arranged on the spray pipe (6), and the spray pipe (6) is arranged above the to-be-defoamed pond (5) in a grid shape.

6. The intermittent automatic defoaming device according to claim 5, wherein: the spray pipe (6) is arranged above the to-be-defoamed pond (5) through a bracket (7).

7. The intermittent automatic defoaming device according to claim 5 or 6, characterized in that: the spray pipe (6) is connected with the conveying pump (2) through a conveying hose (8).

8. A control circuit of an intermittent automatic defoaming device according to any one of claims 1 to 7, characterized by comprising a first branch for connecting the delivery pump (2) with a power source, provided with a contactor (KM) for switching the delivery pump on or off, and a second branch for controlling the delivery pump (2) to start or stop at a set time; the second branch comprises a third branch, a fourth branch and a fifth branch which are connected in parallel, a normally closed contact (KM/NC) for controlling the circulating time relay (4) is arranged on the third branch, a rotary Switch (SA), a grating sensor (1) and the circulating time relay (4) are sequentially connected in series on the fourth branch, and a normally open contact (KM/NO) for controlling the circulating time relay (4) is connected on the fifth branch.

9. The control circuit of the intermittent automatic defoaming device according to claim 8, wherein a control loop Fuse (FU) and an operation indicator lamp (HL 1) are connected to the main line of the second branch.

10. The control circuit of an intermittent automatic defoaming device according to claim 9, characterized in that a stop indicator lamp (HL 2) is arranged on the third branch, and the stop indicator lamp (HL 2) is connected in series with the normally closed contact (KM/NC).