CN216241458U - Emptying device for fan oil system of thermal power plant - Google Patents

Abstract

The utility model discloses a fan oil system emptying device of a thermal power plant, which comprises a fan oil tank, two groups of gear oil pumps, two groups of check valves, two groups of three-way valves and two groups of oil filters, wherein each group of gear oil pumps is connected with the fan oil tank through a first pipeline, the gear oil pumps are connected with the check valves through second pipelines, an emptying branch pipeline is fixedly connected between the two groups of second pipelines, a group of electromagnetic valves are fixedly connected on the emptying branch pipeline close to each group of second pipelines, an emptying main pipeline is fixedly connected between the two groups of electromagnetic valves on the emptying branch pipeline, the bottom end of the emptying main pipeline penetrates under the free liquid level of the fan oil tank, and an air suction pump is fixedly connected on the emptying main pipeline. The utility model has the advantages of rapid emptying and normal operation of the oil system.

Description

Emptying device for fan oil system of thermal power plant

Technical Field

The utility model relates to the technical field of lubricating oil systems of large axial flow fans of thermal power plants, in particular to an emptying device of a fan oil system of a thermal power plant.

Background

Large-scale axial fan is the auxiliary machinery equipment of key among the boiler system of thermal power factory, because axial fan has efficient, the advantage that the energy consumption is low, so widely adopted in large-scale thermal power plant, axial fan is as the power supply of power plant boiler flue gas wind system, its fail safe nature's the safe economy steady operation of direct influence thermal power plant of height, and because gear oil pump inlet tube and outlet pipe all have the air, the gear oil pump starts the back, because the gas compression state is unstable, lead to outlet pipe department not to reaching the pressure of opening the export check valve, the entry can't form effective vacuum and lead to the gear oil pump not to oil. Therefore, it is very important to solve the fault of the oil system from the source and actually improve the safety and reliability of the operation of the large axial flow fan.

The patent number CN 203258342U provides an air exhaust device additionally arranged on a fan oil system, which comprises a filter screen, an adjustable tee joint, a safety net, an oil tank, a gear pump, a one-way valve and an emptying device, wherein one end of the emptying device is connected with an outlet of the gear pump, and the other end of the emptying device is connected with an inlet of the one-way valve; the filter screen is connected with adjustable tee joints, adjustable tee joints are connected with one-way valves and safety nets, the safety nets are connected with an oil tank, and the gear pump is installed above the free liquid level of the oil tank. The utility model has reasonable design, adopts the scheme that a bypass emptying device is additionally arranged at the outlet of the gear pump to ensure that the air in the gear pump can be smoothly discharged at the initial starting stage of the gear pump, avoids the phenomenon of no oil pumping of a standby pump, and fundamentally improves the reliability and the safety of equipment.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide the emptying device of the fan oil system of the thermal power plant, which is quick in emptying and ensures the normal operation of the oil system.

The technical scheme adopted by the utility model for realizing the purpose is as follows: the utility model provides a fan oil system emptying devices of thermal power plant, includes fan oil tank, two sets of gear oil pumps, two sets of check valves, two sets of three-way valves and two sets of oil filters, every group the gear oil pump with all through first tube coupling between the fan oil tank, the gear oil pump with all through second tube coupling between the check valve, it is two sets of fixedly connected with evacuation branch pipe between the second pipeline, be close to every group on the evacuation branch pipe a set of solenoid valve of the equal fixedly connected with of second pipeline, it is two sets of to be located on the evacuation branch pipe fixedly connected with evacuation trunk line between the solenoid valve, the bottom of evacuation trunk line penetrates under the free liquid level of fan oil tank, fixedly connected with aspiration pump on the evacuation trunk line.

The air suction pump, the electromagnetic valve and the gear oil pump are all in signal connection with a controller which takes a single chip microcomputer as a core, and the controller is in signal connection with an emptying button.

The distance between the electromagnetic valve and the second pipeline is not more than 1 cm.

The pipe diameters of the emptying branch pipeline and the emptying main pipeline are smaller than that of the second pipeline.

The utility model has the beneficial effects that: according to the utility model, the emptying branch pipeline is fixedly connected between the two groups of second pipelines, the emptying main pipeline is fixedly connected to the emptying branch pipeline, and the air pump is fixedly connected to the emptying main pipeline, so that air in the first pipeline and the second pipeline can be quickly exhausted through the air pump, and the phenomenon of no oil pumping of the gear oil pump is avoided, thereby ensuring the normal operation of the oil system.

Drawings

FIG. 1 is a schematic structural diagram of a large axial flow fan oil system of a thermal power plant;

FIG. 2 is a schematic view of the structure of the present invention.

In the figure: 1 fan oil tank, 2 gear oil pumps, 3 check valves, 4 three-way valves, 5 oil filters, 6 first pipelines, 7 second pipelines, 8 evacuation branch pipelines, 9 electromagnetic valves, 10 evacuation main pipelines and 11 air pumps.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a large axial flow fan oil system of a thermal power plant includes a fan oil tank 1, two sets of gear oil pumps 2, two sets of check valves 3, two sets of three-way valves 4, and two sets of oil filters 5, wherein the fan oil tank 1, the two sets of gear oil pumps 2, the two sets of check valves 3, the two sets of three-way valves 4, and the two sets of oil filters 5 are connected according to the drawings, and are not repeated herein because of the prior art, wherein each set of gear oil pumps 2 is connected to the fan oil tank 1 through a first pipeline 6, and each set of gear oil pumps 2 is connected to each check valve 3 through a second pipeline 77.

Referring to fig. 2, in order to effectively solve the problem that the gear pump does not oil due to air, an emptying device for a fan oil system of a thermal power plant is provided, which specifically comprises:

fixedly connected with evacuation small transfer line 8 between two sets of second pipelines 7, be close to a set of solenoid valve 9 of the equal fixedly connected with of every group second pipeline 7 on the evacuation small transfer line, be located fixedly connected with evacuation trunk line 10 between two sets of solenoid valves 9 on the evacuation small transfer line, the bottom of evacuation trunk line 10 penetrates under the free liquid level of fan oil tank 1, fixedly connected with aspiration pump 11 on the evacuation trunk line 10, like this through aspiration pump 11 alright be fast with first pipeline 6, the inside air escape of second pipeline 7, thereby avoid gear oil pump 2 the phenomenon of not buying oil to appear, thereby guarantee oil system's normal operating.

In the utility model, the air pump 11, the electromagnetic valve 9 and the gear oil pump 2 are all in signal connection with a controller which takes a single chip microcomputer as a core, and the controller is in signal connection with an emptying button, so that the electromagnetic valve 9 and the air pump 11 can be started through the emptying button, and air in the first pipeline 6 and the second pipeline 7 is exhausted.

The distance between solenoid valve 9 and the second pipeline is not more than 1cm, and further, the pipe diameter of evacuation branch pipe 8 and evacuation trunk line 10 is less than the pipe diameter of second pipeline 7 to make the fluid in the reduction evacuation branch pipe 8 that can be very big persist.

The working principle of the utility model is as follows: during the use, before starting gear oil pump 2, by the controller start aspiration pump 11 earlier and open solenoid valve 9 simultaneously, take out the inside air of first pipeline 6, second pipeline 7 through aspiration pump 11, after aspiration pump 11 work a period, the controller closes aspiration pump 11 and solenoid valve 9 again, later starts gear oil pump 2 and carries out the oil pumping.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. The utility model provides a thermal power plant's fan oil system emptying device, includes fan oil tank (1), two sets of gear oil pump (2), two sets of check valves (3), two sets of three-way valve (4) and two sets of oil filter (5), every group gear oil pump (2) with all connect through first pipeline (6) between fan oil tank (1), gear oil pump (2) with all connect its characterized in that through second pipeline (7) between check valve (3): two sets of fixedly connected with evacuation small transfer line (8) between second pipeline (7), be close to every group on evacuation small transfer line (8) a set of solenoid valve (9) of the equal fixedly connected with of second pipeline (7), it is two sets of to lie in on evacuation small transfer line (8) fixedly connected with evacuation trunk line (10) between solenoid valve (9), the bottom of evacuation trunk line (10) penetrates under the free liquid level of fan oil tank (1), fixedly connected with aspiration pump (11) are gone up in evacuation trunk line (10).

2. The emptying device of the fan oil system of the thermal power plant as claimed in claim 1, characterized in that: the air pump (11), the electromagnetic valve (9) and the gear oil pump (2) are all in signal connection with a controller which takes a single chip microcomputer as a core, and the controller is in signal connection with an emptying button.

3. The emptying device of the fan oil system of the thermal power plant as claimed in claim 1, characterized in that: the distance between the electromagnetic valve (9) and the second pipeline (7) is not more than 1 cm.

4. The emptying device of the fan oil system of the thermal power plant as claimed in claim 1, characterized in that: the pipe diameters of the emptying branch pipe (8) and the emptying main pipe (10) are smaller than that of the second pipeline (7).

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