CN210461920U - Micro-resistance non-blocking bottom valve - Google Patents

Abstract

The utility model provides a speed that little hinders does not have jam bottom valve, does not have the disk seat structure in its upper portion water conservancy diversion way, and the water conservancy diversion way cross-section from the top down is regular horn mouth form, and rivers are through can not producing the swirl because of the cross-section sudden change, and the resistance is minimum, and its lower part is a circulation cross-section and is greater than the cylindrical latticed trash rack of intake pipe circulation cross-section very many times, and rivers pass through the trash rack is very low, and the debris in the aquatic is difficult for adsorbing on the trash rack.

Description

Micro-resistance non-blocking bottom valve

Technical Field

The utility model relates to a bottom valve for pump station.

Background

The water pump is one of the most used machines in the world, most of the water pumps are centrifugal water pumps which work above the water surface, when the pump initially works, the inner cavity of the pump body and the water suction pipeline are required to be filled with water, otherwise, vacuum cannot be formed in the pump, water in a water pool cannot be sucked up, and the pump cannot work normally. In order to fill the pump body with water, a bottom valve is required to be arranged at a water inlet of a pipeline, the bottom valve is a spherical one-way valve, a valve core and a valve seat are arranged in an upper hemisphere of the bottom valve, when water flows from the pump to a pool, the valve core moves downwards to be in contact with the valve seat under the drive of the self weight of the valve core and the water flow, so that the valve is closed, the water flow is cut off, and the water cannot flow out of the pipeline, so that the water can be smoothly filled into the pump. When water enters the pump from the water pool, the valve core is pushed away from the valve seat by water flow to be communicated with the water channel, and external water can continuously enter the pump to ensure that the water pump normally enters water when working. The lower hemisphere is a metal grid mesh which plays the roles of water inlet and slag blocking. The bottom valve is located under water, so that the maintenance is inconvenient, and when the valve core is not tightly sealed due to the fact that a sealing ring is damaged or the valve core is clamped by sundries, the water filling becomes a very hard work. When the bottom valve works, the valve core is always pushed open by water flow, and the energy consumption is extremely high. Because of various defects of the bottom valve, in recent years, water pump water diversion modes of manual water filling and bottom valve water sealing are gradually eliminated, pump stations generally use vacuum pumps and vacuum tanks to fill water, but in order to guide and block impurities, the traditional bottom valve still remains, and the traditional bottom valve does not need to play a role in judging water flow, and in practical application, a valve core is generally detached and only a shell is reserved to reduce water inflow resistance. The valve core is detached immediately, and the bottom valve has some disadvantages in use, namely, a valve seat for installing the valve core still exists and is positioned in the center of the water inlet channel, so that the water blocking effect is realized, and the energy consumption is increased; secondly, the section of the upper hemisphere water inlet channel of the traditional bottom valve is irregular due to the influence of the position of the valve seat, and when water flows pass through the upper hemisphere water inlet channel, the water flow can generate vortex and collision due to too large change of the section of the flow channel, so that local loss is formed, and the resistance is increased; thirdly, the flow section of the mesh water inlet surface for blocking impurities of the traditional bottom valve is not large enough, and is generally only 3-5 times of the section of the water inlet of the water drawing pipe, so that the water inlet flow speed is too high, large impurities such as clothes are easily and firmly attached to the surface of the bottom valve under the action of water inlet pressure to block water inlet holes, the bottom valve cannot normally feed water, and the water pump cannot normally work.

Disclosure of Invention

In order to overcome the drawback of traditional bottom valve, the utility model provides a novel hinder nothing and block up bottom valve a little, it can effectively reduce the energy consumption, avoid blockking up, guarantees that the water pump normally intakes.

The utility model discloses a realize like this: the water flow guiding device is still divided into an upper part and a lower part, the upper part is a flow guiding channel, a valve seat structure is not arranged in the flow guiding channel, the cross section is in a regular bell mouth shape from top to bottom, the water flow cannot generate vortex due to sudden change of the cross section, and the resistance is extremely low. The lower part of the device is a large-diameter latticed cylindrical trash rack instead of a hemispherical trash rack, the flow cross section of the trash rack can be greatly increased by increasing the diameter and the length of the trash rack, the flow speed of water flow passing through the trash rack can be reduced to be very low, and impurities are not easily adsorbed on the trash rack.

Drawings

Fig. 1 is a structural view of the present invention.

In fig. 1, 1 is a flange head, 2 is a housing, 3 is a cylindrical trash rack, 4 is a trash rack side through hole, and 5 is a trash rack bottom through hole. Water flow enters the horn-shaped flow guide channel in the shell 2 through the side through hole 4 and the bottom through hole 5 and then enters the water drawing pipeline. The flow guide in the shell 2 is completely empty without structures such as a valve seat and the like, and water flow basically has no resistance.

Detailed Description

In practical application, the bottom valve is connected with a water pump water drawing pipeline through the flange head 1, the whole bottom valve is submerged into water to a certain depth, under the action of the vacuum pump, water flows into a flow guide channel below the shell 2 through the side through holes 4 and the bottom through holes 5 of the cylindrical trash rack and then enters the water inlet pipeline and the inner cavity of the water pump, and after the inner cavity of the water pump is filled with water, the water pump can start to work normally by starting the water pump. The diameter of the trash rack 3 and the height of the trash rack are 3 times larger than the diameter of the inlet of the water drawing pipe, the water inlet cross section can reach 45 times of the water drawing pipe inlet cross section, the water inlet flow speed of the trash rack can be reduced to about 0.05 meter per second, the water inlet flow speed is far smaller than the flow speed of about 1 meter per second of the trash rack of a traditional bottom valve, when sundries in water flow are attached to the trash rack, the pressure difference generated by the water flow at the front side and the back side of the trash rack is greatly reduced, the sundries are not easily attached to the trash rack, the possibility that the sundries block the water inlet hole is reduced, and the working reliability of the. The middle of the bottom valve diversion channel is not provided with a valve seat for blocking water, the change of the horn-shaped section is smooth, the water flow resistance is greatly reduced, and the energy consumption of the water pump is reduced.

Claims (1)

1. The utility model provides a little hinders no jam bottom valve, it comprises water conservancy diversion way, trash rack, its characterized in that: the flow guide channel is in a bell mouth shape, the inside of the flow guide channel is not provided with a valve seat structure, and a cylindrical trash rack with the diameter and the height more than 3 times of the diameter of a water inlet of the water drawing pipeline is arranged below the flow guide channel.

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