Denitration pump station with servo motor

Abstract

The utility model discloses a denitration pump station with servo motors, which belongs to the technical field of environmental protection equipment in the ship industry and comprises a pump station frame, a water pump support is welded at the bottom of the inner side of the pump station frame, and two parallel servo motor urea pumps are mounted at the top of the water pump support. A liquid inlet of the servo motor urea pump is connected with a urea conveying pipe and connected with a urea inlet pipe through a first tee joint, and a water pump inlet pressure gauge is fixedly installed on the urea conveying pipe. The servo motor urea pump is connected with a urea discharge pipe and connected with a pump station outlet pipe through a second tee joint, and a water pump outlet pressure transmitter is fixedly installed on the pump station outlet pipe. According to the denitration pump station with the servo motor, the water pump with the servo motor is adopted, the rotating speed of the urea pump can be directly and accurately controlled, the function of accurately controlling the flow of denitration agent urea is achieved, and high-precision denitration efficiency control is achieved. Meanwhile, the servo motor is small in size, low in vibration and more stable in operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to ship industry environmental protection equipment technical field, concretely is a kind of with servo motor denitration pump station. BACKGROUND

[0002] The denitration pump station for current ship, generally uses ordinary alternating-current motor, and the pump station itself cannot adjust flow. The flow adjustment function of denitration system needs to rely on additional metering unit and reflux valve group to realize: through the opening of proportioning regulator is controlled, and the flow measurement feedback of flowmeter is combined with the comprehensive application of reflux valve to reach the purpose of controlling flow. The combination mode of traditional pump station+metering unit+reflux valve group, equipment is more, and control is complex. Among them, the pump station is responsible for urea delivery function, and the metering unit is responsible for urea flow adjustment function. CONTENT OF UTILITY MODEL

[0003] The utility model provides a kind of with servo motor denitration pump station, to solve the problem that the combination mode of traditional pump station+metering unit+reflux valve group is proposed in background art, equipment is more, and control is complex.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of with servo motor denitration pump station, the servo motor denitration pump station with the pump station frame, the inner side bottom of the pump station frame is fixedly welded with water pump support, the top of the water pump support is fixedly installed with two parallelly arranged servo motor urea pumps, the liquid inlet of two servo motor urea pumps is fixedly connected with urea delivery pipe respectively, the tail end of two urea delivery pipes is fixedly connected with same three-way one, the liquid inlet of three-way one is fixedly connected with urea inlet pipe, water pump inlet pressure gauge is fixedly installed on the urea delivery pipe;The liquid outlet of servo motor urea pump is fixedly connected with urea discharge pipe, the tail end of urea discharge pipe is fixedly connected with same three-way two, the liquid outlet of three-way two is fixedly connected with pump station outlet pipe, and water pump outlet pressure transmitter is fixedly installed on the pump station outlet pipe.

[0005] Pump station works, urea enters pump station by urea inlet pipe, and flows to two urea delivery pipes by three-way one, then is delivered to the liquid inlet of servo motor urea pump by two urea delivery pipes respectively;By servo motor urea pump, it is delivered to pump station outlet pipe by two urea discharge pipes through three-way two;Water pump inlet pressure gauge is used for observing the inlet pressure of servo motor urea pump, and water pump outlet pressure transmitter is used for monitoring the outlet pressure of servo motor urea pump, and urea is quantitatively delivered by the delivery and flow control of servo motor water pump, after selecting servo motor water pump, frame volume can be further reduced design, and the space occupied by installation is smaller.

[0006] According to the real-time flow data of the control system combined with the urea flow meter, the urea flow rate to the lance is adjusted in real time by controlling the rotating speed of the servo motor urea pump; since the servo motor urea pump has the flow rate adjustment function, the proportional regulating valve of the metering unit can be omitted. The servo motor has the following advantages compared with the common motor + proportional valve control:

[0007] (1) Precision: closed-loop control of position, speed and torque is realized; the problem of step motor out of step is overcome;

[0008] (2) Rotating speed: high speed performance is good, and the general rated rotating speed can reach 2000-3000 revolutions;

[0009] (3) Adaptability: strong overload resistance, capable of bearing three times the rated torque load, especially suitable for occasions with instantaneous load fluctuation and rapid start requirement;

[0010] (4) Stability: low speed operation is stable, and the step operation phenomenon similar to the step motor does not occur during low speed operation. It is suitable for occasions with high speed response requirement;

[0011] (5) Timeliness: the dynamic response time of the motor acceleration and deceleration is short, generally within tens of milliseconds;

[0012] (6) Comfort: heat and noise are significantly reduced.

[0013] In addition, the pump station of the utility model realizes the functions of urea delivery and flow rate adjustment through the servo motor urea pump, and the excess urea does not need to be returned to the urea tank through the overflow safety valve; the overflow safety valve and the urea return pipeline are omitted, and the pipeline design is more simplified; the pump station of the utility model is more accurate and stable in flow rate control function after product performance measurement.

[0014] Preferably, a three-way three is fixedly installed on the urea inlet pipe, a three-way four is fixedly installed on the pump station outlet pipe, an overflow pipe is fixedly installed between the three-way three and the three-way four, and a back pressure valve is fixedly installed on the overflow pipe.

[0015] Preferably, a throttle valve one is fixedly installed on the urea delivery pipe.

[0016] Preferably, a throttle valve two is fixedly installed on the pump station outlet pipe at both ends of the water pump outlet pressure transmitter.

[0017] Preferably, a pipeline shunt is fixedly installed on the urea inlet pipe.

[0018] Preferably, one side of the pump station frame is fixedly provided with an inwardly recessed U-shaped support, a top of the U-shaped support is fixedly provided with a pipe fixing device for limiting the pump station outlet pipe, a bottom of the U-shaped support is fixedly welded with a vertical angle steel plate, and a lower end of the angle steel plate is fixedly provided with a U-shaped clamp for limiting the urea inlet pipe through bolts.

[0019] The belt servo motor denitration pump station has simple structure and convenient use. Urea enters the pump station through the urea inlet pipe, and is then sent to the liquid inlets of the servo motor urea pumps through two urea conveying pipes in a flow direction of a three-way pipe one. The urea is sent out through the servo motor urea pumps, and is then sent to the pump station outlet pipe through two urea discharge pipes in a flow direction of a three-way pipe two. The water pump inlet pressure gauge is used for observing the inlet pressure of the servo motor urea pump, and the water pump outlet pressure transmitter is used for monitoring the outlet pressure of the servo motor urea pump. The urea is quantitatively sent out through the servo motor water pump and flow control. After the servo motor water pump is selected, the frame volume can be further reduced in design, and the installation occupies smaller space. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of a belt servo motor denitration pump station.

[0021] Figure 2 It is a front view of a belt servo motor denitration pump station.

[0022] Figure 3 It is a right view of a belt servo motor denitration pump station.

[0023] Figure 4 It is a top view of a belt servo motor denitration pump station.

[0024] Figure 5 It is a working flow chart of a belt servo motor denitration pump station.

[0025] Figure 6 It is a servo motor rotating speed-flow data curve chart of a belt servo motor denitration pump station.

[0026] In the drawings:

[0027] 1, servo motor urea pump; 2, urea inlet pipe; 3, pump station outlet pipe; 31, throttle valve one; 4, water pump inlet pressure gauge; 5, water pump outlet pressure transmitter; 6, pump station frame; 61, U-shaped support; 62, pipe fixing device; 63, angle steel plate; 64, U-shaped clamp; 7, urea conveying pipe; 71, throttle valve two; 8, three-way pipe one; 9, urea discharge pipe; 10, three-way pipe two; 11, three-way pipe three; 12, three-way pipe four; 13, overflow pipe; 14, back pressure valve; 15, pipe flow divider; 16, water pump support. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] This embodiment provides a denitrification pump station with a servo motor, such as Figures 1 to 6 As shown, the denitration pump station with servo motor includes a pump station frame 6, a water pump bracket 16 is fixedly welded to the inner bottom of the pump station frame 6, and two servo motor urea pumps 1 arranged in parallel are fixedly installed on the top of the water pump bracket 16, and the liquid inlets of the two servo motor urea pumps 1 are respectively fixedly connected to the urea delivery pipe 7, and the ends of the two urea delivery pipes 7 are fixedly connected to the same tee-1 8, and the liquid inlet of the tee-1 8 is fixedly connected to the urea inlet pipe 2, and the water pump inlet pressure gauge 4 is fixedly installed on the urea delivery pipe 7; the liquid outlets of the servo motor urea pumps 1 are respectively fixedly connected to the urea discharge pipe 9, and the ends of the urea discharge pipe 9 are fixedly connected to the same tee-2 10, and the liquid outlet of the tee-2 10 is fixedly connected to the pump station outlet pipe 3, and the water pump outlet pressure transmitter 5 is fixedly installed on the pump station outlet pipe 3.

[0030] When the above equipment is working, urea enters the pump station through the urea inlet pipe 2, flows to the two urea delivery pipes 7 through the tee 1 8, and is then respectively delivered to the liquid inlet of the servo motor urea pump 1 through the two urea delivery pipes 7; it is delivered out through the servo motor urea pump 1, and is delivered to the pump station outlet pipe 3 through the two urea discharge pipes 9 through the tee 2 10; the water pump inlet pressure gauge 4 is used to observe the inlet pressure of the servo motor urea pump 1, and the water pump outlet pressure transmitter 5 is used to monitor the outlet pressure of the servo motor urea pump 1. Urea is delivered and flow-controlled by the servo motor water pump 1 in a quantitative manner. After selecting the servo motor water pump, the frame volume can be further reduced in design, and the installation occupies a smaller space.

[0031] Based on the control system and the real-time flow data from the urea flow meter, the speed of the servo motor urea pump 1 is controlled and adjusted to adjust the urea flow rate delivered to the spray gun in real time. Since the servo motor urea pump 1 has a flow regulation function, the proportional control valve of the metering unit can be omitted. Compared with the current ordinary motor + proportional valve control, the servo motor has the following advantages:

[0032] (1) Accuracy: Achieves closed-loop control of position, speed, and torque; overcomes the problem of stepping motor losing steps;

[0033] (2) Speed: high-speed performance is good, the general rated speed can reach 2000-3000 revolutions;

[0034] (3) adaptability: strong anti-overload capacity, can withstand three times the rated torque load, particularly suitable for occasions with instantaneous load fluctuation and fast start;

[0035] (4) stability: low-speed operation is stable, and step-by-step operation phenomenon similar to step motor does not occur during low-speed operation. It is suitable for occasions with high-speed response requirements;

[0036] (5) timeliness: the dynamic response time of motor acceleration and deceleration is short, generally within tens of milliseconds;

[0037] (6) comfort: heat and noise are significantly reduced.

[0038] In addition, the pump station of the utility model realizes the functions of urea conveying and flow regulation through the servo motor urea pump 1, without the need to return the excess urea to the urea tank through the overflow safety valve; The overflow safety valve and the urea return pipeline are omitted, and the pipeline design is simplified; The pump station of the utility model is more accurate and stable in flow control function after product performance measurement.

[0039] In one embodiment, the three-way three 11 is fixedly installed on the urea inlet pipe 2, the three-way four 12 is fixedly installed on the pump station outlet pipe 3, the overflow pipe 13 is fixedly installed between the three-way three 11 and the three-way four 12, and the back pressure valve 14 is fixedly installed on the overflow pipe 13.

[0040] In this embodiment, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , by installing the overflow pipe 13 for one-way flow of urea between the urea inlet pipe 2 and the pump station outlet pipe 3, the pressure in the urea inlet pipe 2 is reduced, the pressure of the pump station outlet pipe 3 is increased, and the flow regulation function is further realized.

[0041] In one embodiment, the throttle valve one 71 is fixedly installed on the urea conveying pipe 7.

[0042] In this embodiment, referring to Figure 1 and Figure 4 , by setting the throttle valve one 71 on the urea conveying pipe 7, the fluid flow rate in the urea conveying pipe 7 can be adjusted.

[0043] In one embodiment, the throttle valve two 31 is fixedly installed on the pump station outlet pipe 3 at both ends of the water pump outlet pressure transmitter 5.

[0044] In this embodiment, referring to Figure 1 and Figure 4 By setting the throttle valve 31 on the pump station outlet pipe 3, the fluid flow rate of the pump station outlet pipe 3 can be adjusted.

[0045] In an embodiment, the urea inlet pipe 2 is fixedly installed with a pipe shunt 15.

[0046] In the embodiment, referring to Figure 1 and Figure 3 , the fluid in the urea inlet pipe 2 is shunted by the pipe shunt 15, so that the internal pressure of the urea inlet pipe 2 is adjusted.

[0047] In an embodiment, one side of the pump station frame 6 is fixedly installed with an inwardly recessed U-shaped support 61, the top of the U-shaped support 61 is fixedly installed with a pipe fixer 62 for limiting the pump station outlet pipe 3, the bottom of the U-shaped support 61 is fixedly welded with a vertical angle steel plate 63, and the lower end of the angle steel plate 63 is fixedly installed with a U-shaped clamp 64 for limiting the urea inlet pipe 2 through bolts.

[0048] In the embodiment, referring to Figure 3 , the urea inlet pipe 2 is fixed to the lower end of the angle steel plate 63 through the U-shaped clamp 64, and the pump station outlet pipe 3 is fixed to the U-shaped support 61 through the pipe fixer 62, so that vibration during the operation of the pump station is prevented and damage is avoided.

[0049] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A denitrification pump station with a servo motor, comprising a pump station frame (6), characterized in that: A water pump bracket (16) is fixedly welded to the inner bottom of the pump station frame (6), and two servo motor urea pumps (1) arranged in parallel are fixedly installed on the top of the water pump bracket (16). The liquid inlets of the two servo motor urea pumps (1) are respectively fixedly connected to urea delivery pipes (7), and the ends of the two urea delivery pipes (7) are fixedly connected to the same three-way (8), and the liquid inlet of the three-way (8) is fixedly connected to the urea inlet pipe (2). A water pump inlet pressure gauge (4) is fixedly installed on the urea delivery pipe (7); The liquid outlets of the servo motor urea pumps (1) are respectively fixedly connected to urea discharge pipes (9), the ends of the urea discharge pipes (9) are all fixedly connected to the same tee-joint (10), the liquid outlets of the tee-joint (10) are fixedly connected to a pump station outlet pipe (3), and a water pump outlet pressure transmitter (5) is fixedly installed on the pump station outlet pipe (3).

2. The denitrification pump station with servo motor according to claim 1, characterized in that: A three-way tee (11) is fixedly mounted on the urea inlet pipe (2), a four-way tee (12) is fixedly mounted on the pump station outlet pipe (3), an overflow pipe (13) is fixedly mounted between the three-way tee (11) and the four-way tee (12), and a back pressure valve (14) is fixedly mounted on the overflow pipe (13).

3. The denitrification pump station with servo motor according to claim 1, characterized in that: A throttle valve (71) is fixedly mounted on the urea delivery pipe (7).

4. The denitrification pump station with servo motor according to claim 1, characterized in that: Throttle valve 2 (31) is fixedly installed on the pump station outlet pipe (3) at both ends before and after the water pump outlet pressure transmitter (5).

5. The denitrification pump station with servo motor according to claim 1, characterized in that: A pipeline diverter (15) is fixedly mounted on the urea inlet pipe (2).

6. The denitrification pump station with servo motor according to claim 1, characterized in that: An inwardly recessed U-shaped bracket (61) is fixedly mounted on one side of the pump station frame (6); a pipe holder (62) for limiting the position of the pump station outlet pipe (3) is fixedly mounted on the top of the U-shaped bracket (61); a vertical angle steel plate (63) is fixedly welded to the bottom of the U-shaped bracket (61); a U-shaped clamp (64) for limiting the position of the urea inlet pipe (2) is fixedly mounted on the lower end of the angle steel plate (63) by means of bolts.

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