CN219366330U - Exhaust device of centrifugal pump - Google Patents

Abstract

The utility model discloses an exhaust device of a centrifugal pump, which comprises an exhaust pipe connected with an exhaust port of the centrifugal pump and a valve arranged on the exhaust pipe, wherein an outlet of the exhaust pipe is downwards arranged, a plectrum is hinged on the pipe wall of the exhaust pipe beside the outlet, the axis of the outlet is intersected with the plectrum, and an exhaust opening is formed between the plectrum and the outlet; the exhaust pipe is also provided with a contact switch, and the contact point of the contact switch is positioned in the rotation range of the poking plate; the valve is a control valve which is controlled to be opened and closed by a valve actuator, the valve actuator is electrically connected with a receiver and a contact switch, the receiver is connected with a wireless remote controller through wireless communication, and the receiver controls the action of the valve actuator through receiving an opening instruction sent by the wireless remote controller; the contact switch is connected in series with the off signal point of the valve actuator. The utility model solves the problems of long pump starting preparation time and high labor intensity of the existing centrifugal pump applied to a larger water treatment area.

Description

Exhaust device of centrifugal pump

Technical Field

The utility model relates to the technical field of centrifugal pumps, in particular to an exhaust device of a centrifugal pump.

Background

When the centrifugal pump works, water of a water source enters the water inlet pipe under the action of atmospheric pressure or water pressure, the water inlet pipe and the pump body are filled with water to form a vacuum state, when the impeller rotates rapidly, the water in the pump body is thrown out to the outlet of the impeller under the action of centrifugal force, and the central area of the impeller generates vacuum to absorb water, so that continuous water absorption can be realized by continuous pumping. Because of the low air density, if there is gas in the pump body, the centrifugal force generated after rotation will be small, and the low pressure formed in the central area of the impeller is insufficient to suck the liquid into the pump, so that the liquid cannot be conveyed, and this phenomenon is called gas binding. Therefore, before the centrifugal pump works, the air in the pump needs to be discharged by water, and after a vacuum environment is formed in the pump, the pressure difference generated by centrifugation is large enough. The existing exhaust device of the centrifugal pump is characterized in that an exhaust port of a pump body is connected with an exhaust pipe with a valve, when the exhaust device is operated, the valve is manually opened for exhausting, and when water flowing out of the exhaust pipe is seen, the valve on the exhaust pipe is manually closed. In rolling production, because the water treatment area is large, the centrifugal pumps are more, an exhaust pump room is required to be provided with a horizontal flow pond, a central pump room and a laminar flow pump room, the distance between the pump rooms is far, two persons on duty for 1780 lines of water treatment work start the pump for each time, the exhaust time of the pump of each pump room is 2-3 min, the horizontal flow pond pump room to the central pump room is hundreds of meters, the roll changing time is about 8-10 min, the air exhaust work of the duty is completed in a limited time, particularly, the night shift is required to run for completion, running is dangerous on the production site, roll changing is carried out for 1-3 times every time, and the frequency of entering a noise area is increased by increasing the working intensity of workers in an intangible way.

Disclosure of Invention

The utility model aims to provide an exhaust device of a centrifugal pump, which can solve the problems of long preparation time for starting the pump and high labor intensity of the existing centrifugal pump applied to a larger water treatment area.

In order to solve the problems, the utility model adopts the following technical scheme: the centrifugal pump exhaust device comprises an exhaust pipe connected with an exhaust port of a centrifugal pump and a valve arranged on the exhaust pipe, wherein an outlet of the exhaust pipe is downwards arranged, a plectrum is hinged on the pipe wall of the exhaust pipe beside the outlet, the axis of the outlet is intersected with the plectrum, and an exhaust opening is formed between the plectrum and the outlet; the exhaust pipe is also provided with a contact switch, and a contact point of the contact switch is positioned in the rotation range of the poking piece; the valve is a control valve which is controlled to be opened and closed by a valve actuator, the valve actuator is electrically connected with a receiver and the contact switch, the receiver is connected with a wireless remote controller through wireless communication, and the receiver controls the action of the valve actuator by receiving an opening instruction sent by the wireless remote controller; the contact switch is connected in series with a closing signal point of the valve actuator.

Among the above-mentioned centrifugal pump exhaust apparatus's technical scheme, more specific technical scheme can also be: the part of the poking piece, which is positioned under the outlet, is provided with a concave part, and the notch of the concave part faces the outlet.

Further, the pulling piece is provided with a protrusion which touches the contact of the contact switch.

Further, the plectrum includes descending section and the ascending section that uses articulated department as the boundary, ascending section's weight is greater than descending section's weight, be provided with on the blast pipe with descending section's offal slope stopper.

Further, the valve actuator is an electric valve actuator.

Further, the electric valve actuator is connected with the mains supply through a power adapter.

Further, a manual ball valve is arranged on the exhaust pipe between the centrifugal pump and the control valve.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

1. the exhaust device is characterized in that a control valve which is controlled to be opened and closed by a valve actuator is arranged on an exhaust pipe, and communication connection is established between a receiver and a wireless remote controller so as to realize remote automatic valve opening and exhaust; the dial and the contact switch are arranged at the downward outlet of the exhaust pipe, and the dial is stirred to touch the contact switch by means of the water flow of the discharged water after the exhaust pipe is exhausted, so that the aim of closing the valve of the exhaust pipe control valve is fulfilled; the exhaust effect is good, the production efficiency is improved, the pump starting preparation time is shortened by 2 minutes, the labor intensity is reduced, and the time for entering a noise area is shortened.

2. The poking plate is provided with a concave part which is convenient for receiving the water from the exhaust pipe so as to generate enough thrust for the poking plate to touch the contact switch, and the bulge arranged on the poking plate is favorable for accurately touching the contact switch; the upper part of the pulling piece is heavier than the lower part, so that the pulling piece is ensured not to contact with the contact switch in normal state, and the misoperation of closing is avoided.

3. The electric valve actuator is adopted, the performance is reliable, the body is small, the weight is light, the safety is good, the matching is simple, and the continuous and reliable power supply can be obtained by connecting a power adapter.

4. A manual valve is arranged between an exhaust port of the exhaust pipe and a control valve, and can be used as a maintenance valve.

Drawings

Fig. 1 is a schematic diagram of the structure of the exhaust device of the centrifugal pump.

Fig. 2 is a schematic structural view of the plectrum.

Reference numerals illustrate: 1. a centrifugal pump; 2. an exhaust pipe; 3, a manual ball valve; 4. a control valve; 5. an electrically operated valve actuator; 6. a receiver; 7. a wireless remote control; 8. a pulling piece; 8-1, a downlink section; 8-11, concave part; 8-2, an uplink section; 8-21, bulges; 9. and a contact switch.

Detailed Description

The utility model is further described in detail below with reference to the examples of the drawings:

the centrifugal pump exhaust device shown in fig. 1 mainly comprises an exhaust pipe 2, a control valve 4, a valve actuator, a receiver 6, a wireless remote controller 7, a plectrum 8 and a contact switch 9, wherein one end of the exhaust pipe 2 is connected with an exhaust port of the centrifugal pump 1, the other end of the exhaust pipe is provided with a downward outlet, the plectrum 8 is hinged on the pipe wall of the exhaust pipe 2 beside the outlet, the axis of the outlet is intersected with the plectrum 8, and an opening for exhaust is formed between the plectrum 8 and the outlet; the pipe wall of the exhaust pipe 2 is also provided with a contact switch 9, the contact switch 9 is installed at a slight inclination angle, and the contact point of the contact switch 9 is positioned in the rotation range of the poking piece 8. As shown in fig. 2, the plectrum 8 of the present embodiment includes a downlink section 8-1 and an uplink section 8-2, which are bounded by a hinge, the downlink section 8-1 is a portion of the plectrum 8 located directly below the outlet of the exhaust pipe 2, the portion is provided with a concave portion 8-11, and a notch of the concave portion 8-11 faces the outlet of the exhaust pipe 2; the weight of the upper section 8-2 is greater than that of the lower section 8-1, so that in a normal state, the upper section 8-2 of the plectrum 8 cannot be mistakenly touched by the contact switch 9, and a protrusion 8-21 for touching a contact of the contact switch 9 is further arranged on the surface of the upper section 8-2 facing the contact switch 9. The exhaust pipe 2 is provided with an inclined limiting block which is propped against the descending section 8-1 so as to ensure that the plectrum 8 and the outlet of the exhaust pipe 2 are in a joint state to form a triangle when not exhausting, and the forefront end has a certain opening degree so as to facilitate the gas exhaust.

The exhaust pipe 2 is provided with a control valve 4 which is controlled to be opened and closed by a valve actuator, the valve actuator of the embodiment adopts an electric valve actuator 5 with a limiting function, the model of the electric valve actuator 5 is XQ2014-F21B, and the control valve 4 adopts a DN15 two-way ball valve. The electric valve actuator 5 is respectively and electrically connected with the contact switch 9 and the receiver 6, the receiver 6 is connected with the wireless remote controller 7 through wireless communication, the wireless remote controller 7 can adopt a wireless infrared mode, and the experimental action range is about 100 meters. The receiver 6 controls the action of the electric valve actuator 5 by receiving an opening instruction sent by the wireless remote controller 7; the type of the contact switch 9 is Z-15GW22-B, and the contact switch 9 is connected in series with a closing signal point of the electric valve actuator 5. The electric valve actuator 5 is connected with the mains supply through a power adapter, and the power adapter converts the voltage from 220v to 24v to supply power for the electric valve actuator 5 so as to meet the power supply required by normal operation. In other embodiments, the electrically operated valve actuator 5 may be powered by a solar panel, lithium battery, or the like. For easy maintenance, a manual ball valve 3 is mounted on the exhaust pipe 2 between the centrifugal pump 1 and the control valve 4.

When the centrifugal pump 1 is subjected to air pump preparation operation, an operator operates the wireless remote controller 7 to send out an instruction, the receiver 6 receives an opening instruction sent out by the wireless remote controller 7 through wireless communication, the electric valve actuator 5 is used for opening the motor to rotate, the control valve 4 is opened, air reserved in the centrifugal pump 1 is discharged, when the air is exhausted and water is discharged, water flows out of the outlet of the exhaust pipe 2 to strike the poking plate 8 below the outlet of the exhaust pipe 2, the poking plate 8 rotates to touch the contact switch 9, the contact switch 9 feeds back a closing signal to the electric valve actuator 5, the motor is reversed, and the control valve 4 is closed to complete the exhaust process.

The centrifugal pump exhaust device can effectively reduce the working intensity of workers, reduce the frequency of entering a noise area, and greatly reduce the occupational disease risk and safety accidents.

Claims (7)

1. An exhaust device of a centrifugal pump, comprising an exhaust pipe connected with an exhaust port of the centrifugal pump and a valve arranged on the exhaust pipe, and is characterized in that: the exhaust pipe is characterized in that an outlet of the exhaust pipe is arranged downwards, a poking plate is hinged beside the outlet on the pipe wall of the exhaust pipe, the axis of the outlet is intersected with the poking plate, and an exhaust opening is formed between the poking plate and the outlet; the exhaust pipe is also provided with a contact switch, and a contact point of the contact switch is positioned in the rotation range of the poking piece; the valve is a control valve which is controlled to be opened and closed by a valve actuator, the valve actuator is electrically connected with a receiver and the contact switch, the receiver is connected with a wireless remote controller through wireless communication, and the receiver controls the action of the valve actuator by receiving an opening instruction sent by the wireless remote controller; the contact switch is connected in series with a closing signal point of the valve actuator.

2. The centrifugal pump exhaust apparatus according to claim 1, wherein: the part of the poking piece, which is positioned under the outlet, is provided with a concave part, and the notch of the concave part faces the outlet.

3. The centrifugal pump exhaust apparatus according to claim 2, wherein: the pulling piece is provided with a bulge which is contacted with a contact point of the contact switch.

4. A centrifugal pump exhaust apparatus according to claim 3, wherein: the plectrum includes descending section and the ascending section that uses articulated department as the boundary, ascending section's weight is greater than descending section's weight, be provided with on the blast pipe with descending section's offseting slope stopper.

5. The centrifugal pump exhaust apparatus according to any one of claims 1 to 4, wherein: the valve actuator is an electric valve actuator.

6. The centrifugal pump exhaust apparatus according to claim 5, wherein: the electric valve actuator is connected with the mains supply through a power adapter.

7. The centrifugal pump exhaust apparatus according to claim 6, wherein: and a manual ball valve is arranged between the centrifugal pump and the control valve on the exhaust pipe.