CN218992468U - Check valve with leak-proof effect - Google Patents

Abstract

The utility model discloses a check valve with a leakage prevention effect, which belongs to the field of check valves, and comprises a check valve body, wherein a check pipeline is arranged in the check valve body, a sealing block for sealing the check pipeline is connected to the inner wall of the check pipeline in a fitting way, the top of the sealing block is fixedly connected with a built-in valve core of the check valve body, the circle center of the lower surface of the sealing block is fixedly connected with a leakage prevention mechanism, the leakage prevention mechanism comprises a first piston block and a second piston block with the same size, the first piston block is positioned right above the second piston block, a rubber ring and a plurality of first springs are fixedly connected to the opposite sides of the first piston block and the second piston block together, the diameter of the rubber ring is the same as that of the first piston block, the first springs are positioned in the rubber ring, the sealing effect between the sealing block and the interior of the valve body can be improved, and the leakage prevention effect of the valve body can be improved by means of the leakage prevention mechanism.

Description

Check valve with leak-proof effect

Technical Field

The present utility model relates to the field of check valves, and more particularly, to a check valve having a leakage preventing effect.

Background

Check valves are commonly used as bottom valves for pumping devices to prevent backflow of water. The common shortcoming of the fixed valve is that the resistance is big, and its leakproofness is relatively poor when closing, and in long-term use, rivers and the continuous washing of silt in the rivers to the inside of valve body can make the inside condition that leaks that appears easily of valve body.

Traditional check valve simply relies on the sealing block to seal the pipeline in the valve body, lacks leakage prevention mechanism, leads to the valve body after long-term use, and the wearing and tearing condition of different degree can appear in sealing block and pipeline, and then appear leaking the problem easily.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the utility model aims to provide the check valve with the leakage prevention effect, which can realize the sealing effect between the sealing block and the inside of the valve body, and can realize the leakage prevention effect of the valve body by means of the leakage prevention mechanism.

2. Technical proposal

In order to solve the problems, the utility model adopts the following technical scheme.

The check valve with the anti-leakage effect comprises a check valve body, a check pipeline is arranged in the check valve body, a sealing block for sealing the check pipeline is connected to the inner wall of the check pipeline in a fitting way, the top of the sealing block is fixedly connected with a valve core arranged in the check valve body, an anti-leakage mechanism is fixedly connected to the circle center of the lower surface of the sealing block, the anti-leakage mechanism comprises a first piston block and a second piston block with the same size, the first piston block is positioned right above the second piston block, a rubber ring and a plurality of first springs are fixedly connected to the opposite sides of the first piston block and the second piston block together, the diameter of the rubber ring is the same as that of the first piston block, the first springs are positioned in the rubber ring, the arc-shaped outlines of the first piston block, the second piston block and the rubber ring are jointed with the inner wall of the check pipeline in a limiting sliding way, the sealing device is characterized in that a limiting ring is arranged right below the second piston block and fixedly connected with the inner wall of the check pipeline, a sealing block for sealing the check pipeline is connected through the inner wall of the check pipeline in a fitting way, so that when a control valve core moves up and down, a worker can achieve the effect of driving the sealing block to seal or open the check pipeline, when the sealing block completely seals the check pipeline, a leakage prevention mechanism fixedly connected with the lower surface of the sealing block can extend into the check pipeline and is connected with the check pipeline in a fitting way, at the moment, the sealing effect of the sealing block on the check pipeline can be further enhanced by the leakage prevention mechanism, and when the leakage prevention mechanism extends into the check pipeline, the second piston block can contact the limiting ring when the sealing block completely seals the check pipeline because the height of the leakage prevention mechanism is larger than the distance from the lower surface of the sealing block to the upper surface of the limiting ring, and extrude with the spacing ring to reach the distance between first piston piece and the second piston piece and diminish, make first spring carry out deformation compression, and the intra-annular air of rubber receives the compression this moment, makes the rubber ring outwards expand, and then strengthens the leakproofness between rubber ring and the non return pipeline inner wall, reaches the leak protection effect when reinforcing sealing block is sealed.

Further, the lower surface fixedly connected with a plurality of buffer blocks of second piston piece, and a plurality of buffer blocks evenly distributed is at the lower surface of second piston piece, through a plurality of buffer blocks fixed connection at the lower surface of second piston piece to evenly distributed, thereby reach when rivers enter into the non return pipeline from pipeline mouth of pipe, can reduce the impact force of rivers to the lower surface of second piston piece, can reach the problem of avoiding rivers to get into under the effect of impact, from the connection gap.

Further, the lower fixed surface of sealing piece is connected with the sealing ring, the annular draw-in groove with sealing ring looks adaptation has been seted up to one side of the relative sealing ring of non return pipeline inner wall, and sealing ring and annular draw-in groove joint, through the annular draw-in groove mutual joint with sealing ring looks adaptation has been seted up to one side of the relative sealing ring of sealing ring and non return pipeline inner wall, can reach the stability that is located the non return pipeline internal seal department at the promotion sealing piece, strengthen the leakproofness between sealing piece and the non return pipeline again simultaneously, avoid valve body rivers to leak.

Further, a plurality of recesses have been seted up to the relative rubber ring department of non return pipeline inner wall, and fixedly connected with second spring in the recess, the one end fixedly connected with extrusion piece of the relative rubber ring of second spring, the one end and the rubber ring laminating of second spring are kept away from to the extrusion piece are connected, through the outside inflation of rubber ring for the outer wall and the extrusion piece of rubber ring carry out inseparabler laminating, make the self elasticity of second spring can make the extrusion piece closely laminating connect on the outer wall of rubber ring simultaneously, strengthen the leakproofness of rubber ring department again, prevent that rivers from spilling over.

Further, extrusion piece and recess laminating, and spacing sliding connection, the one end that extrusion piece and rubber ring contacted is the arcwall face, and extrusion piece one end in the recess through spacing sliding connection is the arcwall face, can reach the reciprocates that does not influence the second piston piece to avoid damaging the surface of rubber ring.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

(1) This scheme is connected with the sealing block that is used for sealed check pipeline through the inner wall laminating of check pipeline for the staff carries out the time of reciprocating at the control case, can reach and drive the sealing block and seal or open the effect to check pipeline, when the sealing block reaches totally sealed to check pipeline, sealing block lower surface fixed connection's leak protection mechanism can stretch into in the check pipeline, and be connected with the check pipeline laminating, leak protection mechanism's existence can further strengthen sealing block to the sealed effect of check pipeline this moment, and when leak protection mechanism stretches into in the check pipeline, can be because of the high distance that is greater than sealing block lower surface to spacing ring upper surface of leak protection mechanism, make the second piston block can contact the spacing ring when the sealing block carries out totally sealed to check pipeline, and extrude with the spacing ring, thereby reach the distance between first piston block and the second piston block and diminish, make first spring carry out deformation compression, and the intra-annular air of this moment receives the compression, make the rubber ring outwards expand, and then seal between the sealing ring and the check pipeline of reinforcing rubber ring and the seal effect of sealing block when reaching the reinforcing sealing block.

(2) According to the scheme, the buffer blocks are fixedly connected to the lower surface of the second piston block and are uniformly distributed, so that the impact force of water flow on the lower surface of the second piston block can be reduced when the water flow enters the check pipeline from the inlet of the pipeline, and the problem that the water flow enters from the connecting gap under the action of impact can be solved.

(3) According to the scheme, the annular clamping groove matched with the sealing ring is formed in one side, opposite to the sealing ring, of the inner wall of the check pipeline through the sealing ring, so that the stability of the sealing block at the sealing position in the check pipeline can be improved, the sealing performance between the sealing block and the check pipeline is enhanced again, and the water flow leakage of the valve body is avoided.

(4) This scheme is through the outward expansion of rubber ring for the outer wall of rubber ring carries out inseparabler laminating with the extrusion piece, makes the self elasticity of second spring can make the extrusion piece closely laminate and connect on the outer wall of rubber ring simultaneously, strengthens the leakproofness of rubber ring department again, prevents that rivers from spilling over.

(5) According to the scheme, one end of the extrusion block which is in the groove in a limiting sliding mode is an arc-shaped surface, the up-and-down movement of the second piston block can be achieved without being influenced, and the surface of the rubber ring is prevented from being damaged.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of the area A in FIG. 1 according to the present utility model;

FIG. 3 is a schematic view of a rubber ring and a second piston block according to the present utility model;

fig. 4 is a schematic bottom view of the seal block according to the present utility model.

The reference numerals in the figures illustrate:

1. a check valve body; 2. a non-return pipe; 3. a sealing block; 4. a leakage prevention mechanism; 5. a first piston block; 6. a second piston block; 7. a rubber ring; 8. a first spring; 9. a seal ring; 10. a buffer block; 11. a limiting ring; 12. extruding a block; 13. a second spring; 14. a groove.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1:

referring to fig. 1-4, a check valve with anti-leakage effect comprises a check valve body 1, a check pipe 2 is arranged in the check valve body 1, a sealing block 3 for sealing the check pipe 2 is connected to the inner wall of the check pipe 2 in a fitting way, a leakage prevention mechanism 4 is fixedly connected to the top of the sealing block 3 and the inner wall of the check pipe 2 in the sealing block body 1, the anti-leakage mechanism 4 comprises a first piston block 5 and a second piston block 6 with the same size, the first piston block 5 is positioned right above the second piston block 6, a rubber ring 7 and a plurality of first springs 8 are fixedly connected to the opposite sides of the first piston block 5 and the second piston block 6, the diameter of the rubber ring 7 is the same as that of the first piston block 5, the first springs 8 are positioned in the rubber ring 7, the first piston block 5, the second piston block 6 and the arc-shaped outline of the rubber ring 7 are in limiting sliding connection with the inner wall of the check pipe 2, a limiting ring 11 is arranged under the second piston block 6, the limiting ring 11 is in a limiting mechanism 2, when the sealing block 2 is connected to the sealing block 2 in a sealing way, the sealing block 2 is further connected to the sealing block 2 in a sealing way, the sealing block 2 can be stretched into the sealing block 2 in the sealing block 2, the sealing block 2 can be further stretched into the sealing block 2 in the sealing block 2, the sealing block 2 is controlled by the sealing block 2, the sealing block 2 can be connected to the sealing block 2 in the sealing block 2, when the sealing block 2 is stretched into the sealing block 2, the sealing block 2 is sealed 3, and the sealing effect can be sealed by the sealing block 2 is completely can be connected to the sealing 3, and the sealing pipe 2 can be sealed by the sealing pipe 2 is sealed 3 is sealed by the sealing pipe 2, and the sealing pipe 2 is sealed by the sealing pipe 2, the height of the anti-leakage mechanism 4 is larger than the distance from the lower surface of the sealing block 3 to the upper surface of the limiting ring 11, so that the second piston block 6 can be in contact with the limiting ring 11 when the sealing block 3 completely seals the check pipeline 2 and is extruded with the limiting ring 11, the distance between the first piston block 5 and the second piston block 6 is reduced, the first spring 8 is subjected to deformation compression, and at the moment, the air in the rubber ring 7 is compressed, so that the rubber ring 7 is outwards expanded, the tightness between the rubber ring 7 and the inner wall of the check pipeline 2 is further enhanced, and the anti-leakage effect when the sealing block 3 is enhanced is achieved.

The lower surface fixedly connected with a plurality of buffer blocks 10 of second piston piece 6, and a plurality of buffer blocks 10 evenly distributed are at the lower surface of second piston piece 6, through a plurality of buffer blocks 10 fixed connection at the lower surface of second piston piece 6 to evenly distributed, thereby reach when rivers enter into non return pipeline 2 from the pipeline mouth of pipe, can reduce the impact force of rivers to the lower surface of second piston piece 6, can reach the problem of avoiding rivers entering from the connection gap under the effect of impact.

The lower fixed surface of sealing block 3 is connected with sealing ring 9, and the annular draw-in groove with sealing ring 9 looks adaptation has been seted up to one side of the relative sealing ring 9 of check pipeline 2 inner wall, and sealing ring 9 and annular draw-in groove joint, through the annular draw-in groove mutual joint with sealing ring 9 looks adaptation has been seted up to one side of sealing ring 9 relative to the sealing ring 9 of sealing ring 9 and check pipeline 2 inner wall, can reach the stability that is located the check pipeline 2 in promotion sealing block 3, strengthen the leakproofness between sealing block 3 and the check pipeline 2 once more simultaneously, avoid valve body rivers leakage.

A plurality of grooves 14 are formed in the inner wall of the check pipeline 2 at the position, corresponding to the rubber ring 7, of the check pipeline 2, a second spring 13 is fixedly connected in the grooves 14, an extrusion block 12 is fixedly connected to one end, corresponding to the rubber ring 7, of the second spring 13, one end, away from the second spring 13, of the extrusion block 12 is connected with the rubber ring 7 in a lamination mode, the outer wall of the rubber ring 7 and the extrusion block 12 are enabled to be in closer lamination mode through outward expansion of the rubber ring 7, meanwhile, the extrusion block 12 can be tightly in lamination mode through self elasticity of the second spring 13, sealing performance of the rubber ring 7 is enhanced again, and water flow overflow is prevented.

The extrusion piece 12 is attached to the groove 14, the end, in contact with the rubber ring 7, of the extrusion piece 12 is an arc-shaped surface, and the end, in the groove 14, of the extrusion piece 12 is an arc-shaped surface in a limiting sliding connection mode, so that the up-and-down movement of the second piston piece 6 can be achieved without affecting the surface of the rubber ring 7, and damage to the surface of the rubber ring 7 is avoided.

The above description is only of the preferred embodiments of the present utility model; the scope of the utility model is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present utility model, and the technical solution and the improvement thereof are all covered by the protection scope of the present utility model.

Claims (5)

1. The utility model provides a check valve with leak protection effect, includes check valve body (1), be equipped with check pipeline (2), its characterized in that in check valve body (1): the inner wall laminating of check pipeline (2) is connected with sealing block (3) that are used for sealed check pipeline (2), sealing block (3) top and check valve body (1) built-in case fixed connection, sealing block (3) lower surface centre of a circle department fixedly connected with leak protection mechanism (4), leak protection mechanism (4) are including first piston block (5) and second piston block (6) of the same size, first piston block (5) are located directly over second piston block (6), and first piston block (5) and second piston block (6) relative one side fixedly connected with rubber ring (7) and a plurality of first spring (8) jointly, the diameter of rubber ring (7) is the same with first piston block (5), and first spring (8) are located rubber ring (7), the arc profile and check pipeline (2) inner wall laminating of first piston block (5), second piston block (6), and second piston ring (7) are equipped with spacing and are connected with under spacing check pipeline (11).

2. A check valve with leakage preventing effect according to claim 1, characterized in that: the lower surface of the second piston block (6) is fixedly connected with a plurality of buffer blocks (10), and the plurality of buffer blocks (10) are uniformly distributed on the lower surface of the second piston block (6).

3. A check valve with leakage preventing effect according to claim 1, characterized in that: the lower surface fixedly connected with sealing ring (9) of sealing block (3), annular draw-in groove with sealing ring (9) looks adaptation has been seted up to one side of the relative sealing ring (9) of non return pipeline (2) inner wall, and sealing ring (9) and annular draw-in groove joint.

4. A check valve with leakage preventing effect according to claim 1, characterized in that: a plurality of grooves (14) are formed in the position, opposite to the rubber ring (7), of the inner wall of the check pipeline (2), a second spring (13) is fixedly connected in the grooves (14), an extrusion block (12) is fixedly connected to one end, opposite to the rubber ring (7), of the second spring (13), and one end, far away from the second spring (13), of the extrusion block (12) is connected with the rubber ring (7) in a fitting mode.

5. A check valve with leakage prevention effect according to claim 4, wherein: the extrusion block (12) is attached to the groove (14) and is in limiting sliding connection, and one end, in contact with the rubber ring (7), of the extrusion block (12) is an arc-shaped surface.

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