CN114688319A

CN114688319A - Floating ball check valve

Info

Publication number: CN114688319A
Application number: CN202210404333.5A
Authority: CN
Inventors: 严柏苍
Original assignee: Foshan City Shunde District Shunyin Green Design Engineering Co ltd
Current assignee: Foshan City Shunde District Shunyin Green Design Engineering Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-07-01

Abstract

The invention discloses a floating ball check valve, relates to the drainage technology, and provides a scheme aiming at the problem that the opening sensitivity/sealing property of the check valve is contradictory to the micro pressure/low pressure of gravity flow in the prior art. The floating ball check valve comprises a shell which is communicated up and down, the upper part of an inner cavity of the shell is provided with a drainage grid, the lower part of the inner cavity is provided with a blocking mechanism, and a floating ball is arranged in the inner cavity between the drainage grid and the blocking mechanism; a water drainage hole is formed in the middle of the drainage grating, and the floating ball is used for sealing the water drainage hole in a watertight manner when floating; the blocking mechanism is used for blocking the floating ball from falling off the shell. Has the advantages of simple structure and low cost. The opening is completely free from the accumulated pushing of water flow gravity, and the functions of micro-pressure/low-pressure drainage and non-return are completely realized. On the other hand, the non-return effect has a direct relation with the external backflow pressure, and the larger the external backflow pressure is, the stronger the capability of the floating ball for closing the water outlet is, and the better the sealing effect is.

Description

Floating ball check valve

Technical Field

The invention relates to a drainage technology, in particular to a floating ball check valve.

Background

In some underground or semi-underground water-consuming equipment functional rooms, because the water-consuming equipment is arranged in the underground or semi-underground water-consuming equipment functional rooms, drainage facilities need to be laid to drain possibly-occurring internal accumulated water to a nearby outdoor rainwater system so as to prevent the internal equipment from being soaked in water.

According to the relation between the elevation of the equipment room terrace and the elevation of the outdoor rainwater inspection well bottom, two main situations exist: 1) the elevation of the indoor terrace of the equipment room is lower than the elevation of the outdoor rainwater inspection well bottom: a water collecting pit is arranged, and a submersible pump is adopted for over-limit water level forced drainage; 2) the elevation of the indoor terrace of the equipment room is higher than the elevation of the outdoor rainwater inspection well bottom: the drain pipe is arranged to directly discharge accumulated water through gravity flow. To case 2, if the elevation of the indoor terrace of the equipment room is higher than the elevation of the outdoor rainwater inspection well bottom but lower than the elevation of the outdoor terrace, the backflow phenomenon can occur.

At present, backflow prevention equipment in the prior art is mostly used for pressure flow, the backflow prevention sealing degree is high, and the problem that the opening condition of low-pressure/micro-pressure gravity water flow cannot be achieved is also solved. The backflow prevention device which can be opened and closed by micro-pressure/low-pressure gravity water flow has the non-return sealing property and cannot meet the technical requirement of non-return external rainwater.

Therefore, how to reduce the adoption of forced-ventilated facilities in such working environments and realize the function of opening and closing the micro-pressure/low-pressure gravity water flow sensitively can be realized, so as to save the investment cost, which is a problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

The invention aims to provide a floating ball check valve to solve the problems in the prior art.

The invention relates to a floating ball check valve which comprises a shell which is communicated up and down, wherein the upper part of an inner cavity of the shell is provided with a drainage grid, the lower part of the inner cavity is provided with a blocking mechanism, and a floating ball is arranged in the inner cavity between the drainage grid and the blocking mechanism;

a water drainage hole is formed in the middle of the drainage grating, and the floating ball is used for sealing the water drainage hole in a watertight manner when floating;

the blocking mechanism is used for blocking the floating ball from falling off the shell.

The drainage grille is detachably arranged on the upper part of the inner cavity.

The lower end of the drainage grid at the drainage hole is provided with a water stop rubber ring.

The lower end of the water stop rubber ring is provided with a horn mouth.

The outer side surface of the water-stopping rubber ring protrudes outwards and is detachably buckled on the inner side of the water drainage hole, and the bottom of the water-stopping rubber ring protrudes out of the lower end surface of the drainage grid.

The drainage grille is fixedly provided with an upper guide ring in the middle of the drainage hole through a plurality of grille bars with center divergently extending; the upper end of the floating ball is provided with an upper guide rod which extends vertically; the upper guide rod penetrates into the upper guide ring in a sliding mode.

The blocking mechanism comprises an outer ring which is horizontally arranged, and a plurality of ribs which are divergently extended from the center are arranged in the outer ring; the shell is provided with an inward extending flange below the outer ring; the flange is used for supporting the outer ring; the rib is used for blocking the floating ball from separating.

A lower guide ring is fixedly arranged at the central position of the outer ring through a rib; the lower end of the floating ball is provided with a vertically extending lower guide rod; the lower guide rod penetrates into the lower guide ring in a sliding mode.

The floating ball is a hollow ball body.

The lower end surface of the floating ball can also be a plane.

The floating ball check valve has the advantages of being simple in structure and low in cost. The water can be drained without being pushed by the accumulated gravity of water flow when the valve is opened completely, and the function can be finished by micro pressure/low pressure when the valve is stopped. On the other hand, the non-return effect has a direct relation with the external backflow pressure, and the larger the external backflow pressure is, the stronger the ability of the floating ball to close the water outlet is, and the better the sealing effect is.

Drawings

Fig. 1 is a schematic axial side half-section structure of a first embodiment of a floating ball check valve according to the present invention.

Fig. 2 is a schematic axial sectional structure of a first embodiment of a floating ball check valve according to the present invention.

FIG. 3 is a schematic diagram of the forward drainage operation of the floating ball check valve of the present invention.

Fig. 4 is a schematic view of reverse water stopping operation of the floating ball check valve.

Fig. 5 is a schematic axial sectional structure view of a second embodiment of the floating ball check valve according to the present invention.

Fig. 6 is a schematic axial sectional structure view of a third embodiment of the floating ball check valve according to the present invention.

Reference numerals:

10-shell, 11-flange;

20-a drainage grid, 21-a drainage hole, 22-a grid bar, 23-an upper guide ring and 24-a water stop rubber ring;

30-floating ball, 31-upper guide rod and 32-lower guide rod;

40-outer ring, 41-rib, 42-lower guide ring.

Detailed Description

Example one

As shown in fig. 1 and 2, the float ball check valve of the present invention includes a housing 10 which is vertically through, a drainage grid 20 is provided at an upper portion of an inner cavity of the housing 10, a blocking mechanism is provided at a lower portion of the inner cavity, and a float ball 30 is further provided between the drainage grid 20 and the blocking mechanism in the inner cavity. The middle part of the drainage grid 20 is provided with a drainage hole 21, and the floating ball 30 is used for sealing the drainage hole 21 in a watertight manner when floating. The blocking mechanism is used for blocking the floating ball 30 from falling and separating from the shell 10.

The housing 10, the drain grating 20, the float 30 and the blocking mechanism can be made of any suitable known material such as plastic, cast iron, steel. Wherein the housing 10 is preferably cylindrical in practice. Accordingly, the drainage grid 20 and the blocking means are preferably also arranged in a centrosymmetric configuration in the interior space. The floating ball 30 mainly provides the fitting degree between the upper part of the floating ball and the water-stopping rubber ring 24 and prevents the drainage dirt from being retained on the upper surface of the floating ball, so that the non-return sealing effect is influenced, and the floating ball can be arranged into a regular sphere or other three-dimensional structures with circular horizontal cross sections.

The drainage grid 20 is detachably mounted on the upper part of the inner cavity, for example, by screwing or fastening. The detachable mounting facilitates the cleaning management and troubleshooting of the inner cavity of the housing 10.

The drainage grid 20 is provided with a water-stopping rubber ring 24 at the lower end of the drainage hole 21. The sealing performance can be improved after the water stopping rubber ring 24 is arranged, and the water stopping rubber ring 24 is preferably made of flexible water stopping materials such as rubber and silica gel.

The lower end of the water-stopping rubber ring 24 is provided with a bell mouth, so that the contact fit degree with the floating ball 30 is improved. Furthermore, the inner side surface of the horn mouth can be made into an inwards concave cambered surface, and the radian is adapted to the contact position of the upper part of the floating ball 30.

The outer side surface of the water stop rubber ring 24 protrudes outwards and is detachably buckled on the inner side of the water discharge hole 21, and the material of the water stop rubber ring 24 is more easily aged relative to the whole check valve, and the aging effect directly influences the check effect. Therefore, the detachable installation mode is convenient for replacing new spare parts in time so as to maintain high tightness. The bottom of the water stop rubber ring 24 protrudes out of the lower end face of the drainage grid 20, so that the hard floating ball 30 can be prevented from directly colliding with the corner of the drainage hole 21, and the safety and the reliability can be still ensured after the water stop rubber ring is used for a long time.

In order to realize the floating of high-density materials such as steel materials, the floating ball 30 is a hollow sphere. Under the guidance of the inventive concept disclosed in the present invention, those skilled in the art can make corresponding modifications to achieve the function of floating the solid floating ball 30 to close the drainage hole 21, and the material of the floating ball 30 is selected from all known materials, such as light and hard plastics, which are hard but have a density lower than that of water. Thus, the hollow structure is not the only structure to implement the solution of the present invention.

The blocking mechanism comprises an outer ring 40 which is horizontally arranged, and a plurality of ribs 41 which are divergently extended from the center are arranged in the outer ring 40. The housing 10 is provided with an inwardly extending flange 11 below the outer ring 40. The flange 11 serves to hold the outer ring 40. The rib 41 is used for blocking the floating ball 30 from being separated. The blocking mechanism is only used for blocking the floating ball 30, and does not block the water flow.

In order to ensure that the floating ball 30 and the drain hole 21 are aligned and matched quickly and accurately, the floating ball 30 and the drain grating 20 or the blocking mechanism are provided with a limiting guide structure which is matched with each other. The drainage grille 20 is fixedly provided with an upper guide ring 23 at the middle part of the drainage hole 21 through a plurality of grille bars 22 with center divergently extending. The upper end of the floating ball 30 is provided with an upper guide rod 31 which extends vertically. The upper guide rod 31 slidably penetrates the upper guide ring 23. The center of the outer ring 40 is fixedly provided with a lower guide ring 42 through a rib 41. The lower end of the floating ball 30 is provided with a lower guide rod 32 extending vertically. The lower guide bar 32 slidably penetrates the lower guide ring 42.

The working principle of the floating ball check valve is shown in fig. 3 and 4, when the floating ball check valve is installed, a shell 10 is arranged in the ground of an equipment room, and the lower end part of the shell is externally connected with a drainage pipeline communicated with an outdoor rainwater system. The working state is normally open, when accumulated water is positively discharged out of the equipment room, water flows into the inner cavity of the shell 10 through the water discharge hole 21 under the action of gravity, flows through the outer part of the floating ball 30 and then passes through the blocking mechanism to reach the water discharge pipeline. The forward process does not need to be started by gravity accumulation, and is suitable for all micro-pressure/low-pressure drainage systems.

When the rainwater flows backward, the floating ball 30 is lifted synchronously by the buoyancy before the floating ball 30 is submerged by the rainwater. As the water level rises in the inner cavity, the upper part of the floating ball 30 can completely close the drainage hole 21 easily. As the external water level becomes higher, the upward pressure applied to the floating ball 30 becomes larger. At this time, the floating ball 30 is in a stress balance state, and satisfies the mechanical formula F1+ F-F2 + G, and G-F; wherein F1 is the pressure corresponding to the external water level difference, F is the buoyancy of the floating ball 30, F2 is the reaction force of the water stop rubber ring 24 to the floating ball 30, G is the gravity of the floating ball. Therefore, the higher the external water level is, the stronger the sealing performance of the floating ball check valve is.

Example two

As shown in fig. 5, the main difference between the present embodiment and the first embodiment is that a lower section of the floating ball 30 is removed and is closed by a horizontal end surface. The advantage of the first embodiment is that in the normally open state, the floating ball 30 is in surface contact with the blocking mechanism, and a more stable state is maintained. When backward flow occurs, under the same water level change, the volume of the water immersed in the water is larger, the buoyancy can reach the value required by floating more easily, and the sensitivity of reverse stopping is higher.

EXAMPLE III

As shown in fig. 6, the main difference between the present embodiment and the second embodiment is that the floating ball 30 directly cuts off the lower half section to form a hemisphere. The second embodiment has the advantages that the processing and the production are easier, the whole length of the shell 10 can be shortened, and the floating ball is particularly suitable for the environment with limited sinking depth, but the total volume of the cavity in the floating ball is reduced, the total buoyancy borne by the floating ball is reduced, so that the material of the floating ball needs to be considered, and the floating ball can float freely.

It will be apparent to those skilled in the art that various other changes and modifications may be made in the above-described embodiments and concepts and all such changes and modifications are intended to be within the scope of the appended claims.

Claims

1. A floating ball check valve is characterized by comprising a shell (10) which is communicated up and down, wherein the upper part of an inner cavity of the shell (10) is provided with a drainage grid (20), the lower part of the inner cavity is provided with a blocking mechanism, and a floating ball (30) is arranged between the drainage grid (20) and the blocking mechanism in the inner cavity;

a water drainage hole (21) is formed in the middle of the drainage grid (20), and the floating ball (30) is used for sealing the water drainage hole (21) in a watertight manner when floating;

the blocking mechanism is used for blocking the floating ball (30) from falling off the shell (10).

2. The floating ball check valve of claim 1, wherein the drain grid (20) is detachably mounted to the upper portion of the inner cavity.

3. The floating ball check valve according to claim 1, wherein the drain grating (20) is provided with a water stop rubber ring (24) at the lower end of the drain hole (21).

4. The floating ball check valve according to claim 3, wherein a bell mouth is formed at the lower end of the water stop rubber ring (24).

5. The floating ball check valve according to claim 3, wherein the outer side surface of the water stop rubber ring (24) protrudes outward and is detachably fastened at the inner side of the water discharge hole (21), and the bottom of the water stop rubber ring (24) protrudes out of the lower end surface of the water discharge grid (20).

6. The floating ball check valve according to claim 1, wherein the drain grating (20) is fixedly provided with an upper guide ring (23) at the middle of the drain hole (21) through a plurality of grating bars (22) with center divergently extending; the upper end of the floating ball (30) is provided with an upper guide rod (31) which extends vertically; the upper guide rod (31) penetrates into the upper guide ring (23) in a sliding way.

7. The floating ball check valve according to claim 1, wherein said blocking mechanism comprises a horizontally disposed outer ring (40), said outer ring (40) having a plurality of radially extending ribs (41) disposed therein; the shell (10) is provided with an inward extending flange (11) below the outer ring (40); the flange (11) is used for supporting the outer ring (40); the rib (41) is used for blocking the floating ball (30) from being separated.

8. The floating ball check valve according to claim 7, wherein a lower guide ring (42) is fixedly arranged at the central position of the outer ring (40) through a rib (41); the lower end of the floating ball (30) is provided with a lower guide rod (32) which extends vertically; the lower guide rod (32) is slidably inserted into the lower guide ring (42).

9. The floating ball check valve according to claim 1, wherein said floating ball (30) is a hollow sphere.

10. The floating ball check valve according to claim 1, wherein a lower end surface of the floating ball (30) is a flat surface.