CN217328724U - Self-priming valve capable of preventing vacuum damage - Google Patents

Abstract

The utility model discloses a self-priming valve preventing vacuum damage, which comprises a valve body, wherein a valve cover connected with the valve body through screw threads is arranged below the valve body; the top of the valve body is provided with an exhaust port, and the middle of the valve cover is provided with an inlet; a valve cavity is arranged in the valve body, and the top end of the valve cavity is provided with an opening communicated with the exhaust port; the valve cavity is internally provided with only one valve core, one end of the valve core, facing the opening at the top end of the valve cavity, is provided with a positioning column, and the outside of the positioning column is sleeved with a sealing gasket; the inner wall of the valve cavity is provided with a sliding groove arranged along the axial direction of the valve cavity, the sliding groove is of a splayed structure, a convex sliding sheet is arranged on the outer side of the valve core and is arranged in the sliding groove, and the valve core can move in the valve cavity along the sliding groove. The utility model discloses wholly make by corrosion-resistant plastics material, inside does not contain the spring, and corrosion resistance is high, is fit for using on chemical industry and sewage, avoids the vacuum environment to appear in the container, effectively prevents that the container from shriveling, breaking.

Description

Prevent vacuum damage from inhaling valve

Technical Field

The utility model relates to a from inhaling valve technical field, in particular to prevent vacuum damage from inhaling valve.

Background

The vacuum break valve is a safety valve. The valve is mainly used in a container or a pipeline, when the pipeline or the container generates negative pressure or vacuum gradually rises due to the running or stopping of a system, the valve can be automatically opened to destroy the vacuum effect, so that the pipeline and other equipment cannot be shriveled or dented, and the safety of the equipment is protected.

The existing vacuum breaker valve generally comprises a valve body, a valve cavity is arranged in the valve body, a valve core is arranged in the valve cavity, a valve seat in threaded connection with the valve body is arranged below the valve body, an air inlet is arranged at the top of the valve body, and an air outlet is arranged on the valve seat; the valve cavity inner wall is provided with a sliding groove arranged along the axial direction, the outer wall of the valve core is provided with a sliding sheet matched with the sliding groove, one end of the valve core facing the air inlet is provided with a sealing pad matched with the position of the top of the valve cavity, and one end of the valve core facing the valve seat is provided with a spring abutted against the valve seat. When the pipeline is in a normal state, the valve core is pushed by the elastic force of the spring and positive pressure in the pipeline to move towards the air inlet, so that the sealing gasket is abutted against the end face of the upper end of the valve cavity to realize stopping, when negative pressure occurs in the pipeline, the valve core moves downwards to enable the air inlet to be communicated with the valve cavity, and atmosphere is discharged into the pipeline from the valve cavity, so that the negative pressure of the pipeline is eliminated.

The existing vacuum breaker valve is not suitable for being used in chemical engineering and sewage, the chemical engineering and the sewage contain a large amount of corrosive substances, and the spring is easily corroded and loses elasticity in the chemical engineering and the sewage, so that the vacuum breaker valve is out of work, and the phenomena of shriveling and concave cracking still occur in a plastic container and a plastic chemical pipeline.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a prevent vacuum damage from inhaling valve, simple structure, corrosion-resistant can be arranged in chemical industry and sewage system.

Therefore, the technical scheme of the utility model is that: a self-priming valve capable of preventing vacuum damage comprises a valve body, wherein a valve cover in threaded connection with the valve body is arranged below the valve body; the top of the valve body is provided with an exhaust port, and the middle of the valve cover is provided with an inlet; a valve cavity is arranged in the valve body, and the top end of the valve cavity is provided with an opening communicated with the exhaust port; the valve cavity is internally provided with only one valve core, one end of the valve core, facing the opening at the top end of the valve cavity, is provided with a positioning column, and the outside of the positioning column is sleeved with a sealing gasket; the inner wall of the valve cavity is provided with a sliding groove arranged along the axial direction of the valve cavity, the sliding groove is of a splayed structure, a convex sliding sheet is arranged on the outer side of the valve core and is arranged in the sliding groove, and the valve core can move in the valve cavity along the sliding groove.

The utility model discloses the valve pocket is inside only to have the case, does not set up the spring of metal material, and whole from inhaling the valve all is made by corrosion-resistant plastics, for example PVC, PP etc. when using on chemical industry and sewage, can not corroded easily. When the valve is used, the valve body is arranged in the plastic container through the valve cover, when liquid in the container does not contact the valve core, the valve core moves downwards along the sliding groove under the action of self gravity, and the sealing gasket at the top end of the valve core is separated from the opening at the top end of the valve cavity, so that the container is communicated with outside air through the valve cavity and the exhaust port, a vacuum environment is prevented from being formed when the container is not full of liquid, and the problems of shriveling, deformation, cracking and the like of the container are effectively avoided; when the liquid level in the container rises, liquid enters the valve cavity through the valve cover to contact with the valve core, the buoyancy force borne by the valve core is larger than the gravity of the valve core, the valve core moves upwards along the sliding groove under the action of the buoyancy force, gas in the valve cavity is discharged simultaneously, and finally the sealing gasket at the top end of the valve core is tightly attached to the opening at the top end of the valve cavity, so that the valve cavity and the exhaust port are sealed, and the liquid is prevented from flowing out.

Preferably, the sliding groove is formed by two inclined groove plates, the distance between the two groove plates is the groove width of the sliding groove, and the groove width is gradually increased from top to bottom, namely the groove width close to the top of the valve body is smaller than the groove width close to the valve cover. Because the valve core needs to move downwards by means of self gravity, in order to reduce the friction force between the sliding sheet and the sliding groove, the sliding groove is set to be of a structure with a gradually-increased opening at the lower end, and the valve core can move downwards more smoothly.

Preferably, the groove width of the top end of the sliding groove is the smallest, and the smallest groove width is matched with the thickness of a sliding sheet of the valve core. The minimum groove width at the top end of the sliding groove can be just used for the sliding sheet of the valve core to pass through, when the valve core moves upwards, the position of the sliding sheet is limited, the valve core is prevented from shaking, and the valve cavity is sealed by the valve core better.

Preferably, 3 sliding chutes are arranged in the valve cavity and are uniformly distributed on the inner wall of the valve cavity; and 3 convex sliding sheets are arranged on the outer side of the valve core and are respectively arranged in the three sliding grooves. Three spout evenly distributed can provide more firm removal track for the case, guarantees the stability that the case removed.

Preferably, the whole sealing gasket on the valve core is of an annular structure, and the outer diameter of the sealing gasket is larger than the inner diameter of the opening at the top end of the valve cavity; one side, facing the opening at the top end of the valve cavity, of the sealing gasket is provided with a circle of annular boss, and the outer diameter of the annular boss is matched with the inner diameter of the opening at the top end of the valve cavity. The annular boss at the upper end of the sealing gasket can be clamped into the opening at the top end of the valve cavity, the sealing gasket is blocked outside the opening at the top end of the valve cavity, and the sealing gasket and the valve cavity are matched to achieve a better sealing effect.

Preferably, a step surface is arranged on the inner side of the valve cover facing the valve cavity, and an upright post is arranged at one end of the valve core facing the valve cover and can be abutted against the step surface. The valve core falls down at the interface of the valve cavity and the valve cover under the action of self gravity, and the upright column at the bottom of the valve core can support the valve core, so that the bottom of the valve core is prevented from blocking the communication between the valve cavity and the valve cover, and a gas inlet channel is formed between the bottom of the valve core and the step surface of the valve cover.

Preferably, the top end of the positioning column on the valve core is of a circular truncated cone-shaped structure, the outer diameter of the positioning column is matched with the inner diameter of the opening at the top end of the valve cavity, the positioning column can be inserted into the opening at the top end of the valve cavity, and the sealing gasket at the bottom of the positioning column abuts against the outer side of the opening at the top end of the valve cavity to block the valve cavity and the exhaust port. The outer diameter of the positioning column body is smaller than the inner diameter of the opening at the top end of the valve cavity, and when the valve core moves upwards, the top end of the circular truncated cone-shaped structure is more convenient for the positioning column to be inserted into the opening at the top end of the valve cavity.

Preferably, an external thread is arranged below the valve body, an internal thread matched with the valve cover is arranged on the valve cover, the valve cover and the valve body are fixedly connected through a thread, and a sealing ring is arranged between the valve cover and the valve body.

Compared with the prior art, the beneficial effects of the utility model are that: the whole body can be made of corrosion-resistant plastic materials, the interior does not contain springs, the corrosion resistance is high, and the water-based paint is suitable for being used in chemical industry and sewage; the valve core moves smoothly, and according to the liquid level condition in the container, can automatic switch over closes and opens two kinds of states, has both guaranteed that the container does not appear vacuum environment when liquid is not full, can not cause the container shrivelled, break, and when guaranteeing to fill liquid in the container again, liquid can not be excessive from the valve body, guarantees the leakproofness of container.

Drawings

The following detailed description is made with reference to the accompanying drawings and embodiments of the present invention

FIG. 1 is a view showing an internal structure of the present invention in a closed state;

FIG. 2 is an internal structure view of the ventilation state of the present invention;

FIG. 3 is a sectional view of the valve body of the present invention;

fig. 4 is a schematic diagram of the position of the sliding groove in the valve cavity.

Labeled in the figure as: the valve comprises a valve body 1, external threads 11, a sealing ring 12, a valve cavity 13, a top opening 14, a valve cover 2, an inlet 21, a step surface 22, an exhaust port 3, a valve core 4, a positioning column 41, a sliding sheet 42, a stand column 43, a sealing gasket 5, an annular boss 51, a sliding groove 6 and a groove plate 61.

Detailed Description

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like, indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.

Furthermore, if any, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

See the drawings. The self-priming valve capable of preventing vacuum damage comprises a valve body 1, wherein a valve cover 2 in threaded connection with the valve body is arranged below the valve body; an external thread 11 is arranged below the valve body 1, an internal thread matched with the valve cover 2 is arranged on the valve cover 2, the valve cover 2 and the valve body 1 are fixedly connected through threads, and a sealing ring 12 is arranged between the valve cover 2 and the valve body 1; the valve cover can be connected into a plastic container or a plastic chemical pipeline, the middle of the valve cover 2 is provided with an inlet 21 which can be communicated with the valve cavity, the plastic container and the plastic chemical pipeline.

The top of the valve body 1 is provided with an exhaust port 3, a valve cavity 13 is arranged in the valve body 1, an opening 14 at the top of the valve cavity is communicated with the exhaust port 3, only one valve core 4 is arranged in the valve cavity 13, a spring is not arranged in the valve cavity 13, and the whole self-priming valve is made of corrosion-resistant plastics, such as PVC, PP and the like, and cannot be easily corroded when used in chemical engineering and sewage. One end of the valve core 4 facing the exhaust port is provided with a positioning column 41, the top end of the positioning column is in a circular truncated cone-shaped structure, the outer diameter of the positioning column 41 is matched with the inner diameter of the top opening 14 of the valve cavity, and the positioning column can be inserted into the top opening 14 of the valve cavity; the outer diameter of the positioning column 41 body is smaller than the inner diameter of the valve cavity top opening 14, and when the valve core moves upwards, the top end of the circular truncated cone-shaped structure is more convenient for the positioning column to be inserted into the valve cavity top opening.

The outer side of the positioning column 41 is sleeved with a sealing gasket 5, the sealing gasket is of an annular structure, and the outer diameter of the sealing gasket 5 is larger than the inner diameter of the opening 14 at the top end of the valve cavity; one side, facing the top opening of the valve cavity, of the sealing gasket 5 is provided with a ring of annular boss 51, and the outer diameter of the annular boss 51 is matched with the inner diameter of the top opening 14 of the valve cavity. The annular boss at the upper end of the sealing gasket can be clamped into the opening at the top end of the valve cavity, the sealing gasket is blocked outside the opening at the top end of the valve cavity, and the sealing gasket and the valve cavity can play a better sealing effect in cooperation to block the valve cavity and the exhaust port.

The inner wall of the valve cavity 13 is provided with 3 sliding grooves 6 arranged along the axial direction of the valve cavity, and the 3 sliding grooves are uniformly distributed on the inner wall of the valve cavity; the outer side of the valve core 4 is provided with 3 convex sliding sheets 42 which are respectively arranged in the three sliding grooves, and the valve core can move in the valve cavity along the sliding grooves. Three spout evenly distributed can provide more firm removal track for the case, guarantees the stability that the case removed.

The sliding groove 6 is composed of two inclined groove plates 61, the sliding groove is of a splayed structure integrally, the distance between the two groove plates is the groove width of the sliding groove, the groove width is gradually increased from top to bottom, namely the groove width L1 close to the top of the valve body is smaller than the groove width L2 close to the valve cover. The groove width at the top end of the sliding groove is the minimum, and the minimum groove width is matched with the thickness of a sliding sheet of the valve core. Because the valve core needs to move downwards by self gravity, in order to reduce the friction force between the sliding sheet and the sliding groove, the sliding groove is set into a structure with a gradually increased opening at the lower end, so that the valve core can move downwards more smoothly. The minimum groove width at the top end of the sliding groove can be just used for a sliding sheet of the valve core to pass through, when the valve core moves upwards, the position of the sliding sheet is limited, the valve core is prevented from shaking, and the valve cavity is sealed by the valve core better.

The inner side of the valve cover 2 facing the valve cavity is provided with a step surface 22, one end of the valve core 4 facing the valve cover is provided with an upright column 43, and the upright column 43 can be abutted against the step surface 22. The valve core falls down at the interface of the valve cavity and the valve cover under the action of self gravity, and the upright column at the bottom of the valve core can support the valve core, so that the bottom of the valve core is prevented from blocking the communication between the valve cavity and the valve cover, and an air inlet channel is formed between the bottom of the valve core and the step surface of the valve cover.

During the use, valve body 1 is installed in the plastic container through valve gap 2, and when the liquid in the container did not contact case 4, case 4 received self action of gravity, moves down along spout 6, and the sealed 5 and the separation of valve pocket top end opening 14 of case 4 top to through valve pocket 13, gas vent 3 intercommunication container and outside air, prevent that the container from forming vacuum environment when liquid is not full, effectively avoid the container to appear shrivelled, warp, fracture scheduling problem.

When the liquid level in the container rises, the liquid enters the valve cavity 13 through the valve cover 2 and contacts with the valve core 4, the valve core 4 is subjected to buoyancy, and the buoyancy is larger than the gravity of the valve core 4, so that the valve core moves upwards along the sliding groove 6 under the action of the buoyancy, gas in the valve cavity is discharged, and finally the sealing gasket 5 at the top end of the valve core 4 is tightly attached to the opening 14 at the top end of the valve cavity, so that the valve cavity and the exhaust port are sealed, and the liquid is prevented from flowing out.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A self-priming valve capable of preventing vacuum damage comprises a valve body, wherein a valve cover in threaded connection with the valve body is arranged below the valve body; the method is characterized in that: the top of the valve body is provided with an exhaust port, and the middle of the valve cover is provided with an inlet; a valve cavity is arranged in the valve body, and the top end of the valve cavity is provided with an opening communicated with the exhaust port; the valve cavity is internally provided with only one valve core, one end of the valve core, which faces the opening at the top end of the valve cavity, is provided with a positioning column, and a sealing gasket is sleeved outside the positioning column; the inner wall of the valve cavity is provided with a sliding groove arranged along the axial direction of the valve cavity, the sliding groove is of a splayed structure, a convex sliding sheet is arranged on the outer side of the valve core and is arranged in the sliding groove, and the valve core can move in the valve cavity along the sliding groove.

2. A vacuum break resistant self-priming valve as claimed in claim 1, wherein: the spout comprises the frid of twice slope, and the interval of two frids is the groove width of spout, and the groove width from the top down increases gradually, and the groove width that is close to the valve body top is less than the groove width that is close to valve gap department promptly.

3. The vacuum break resistant self-priming valve of claim 2 wherein: the groove width at the top end of the sliding groove is the minimum, and the minimum groove width is matched with the thickness of a sliding sheet of the valve core.

4. A vacuum break resistant self-priming valve as claimed in claim 1, wherein: the valve cavity is internally provided with 3 sliding chutes which are uniformly distributed on the inner wall of the valve cavity; and 3 convex sliding sheets are arranged on the outer side of the valve core and are respectively arranged in the three sliding grooves.

5. The vacuum break resistant self-priming valve of claim 1 wherein: the whole sealing gasket on the valve core is of an annular structure, and the outer diameter of the sealing gasket is larger than the inner diameter of the opening at the top end of the valve cavity; one side, facing the opening at the top end of the valve cavity, of the sealing gasket is provided with a circle of annular boss, and the outer diameter of the annular boss is matched with the inner diameter of the opening at the top end of the valve cavity.

6. A vacuum break resistant self-priming valve as claimed in claim 1, wherein: the valve gap is equipped with the step face towards the inboard of valve pocket, and the one end that the case faced the valve gap is equipped with the stand, and the stand can with step face butt.

7. The vacuum break resistant self-priming valve of claim 1 wherein: the top end of a positioning column on the valve core is of a circular truncated cone-shaped structure, the outer diameter of the positioning column is matched with the inner diameter of an opening in the top end of the valve cavity, the positioning column can be inserted into the opening in the top end of the valve cavity, and a sealing gasket at the bottom of the positioning column abuts against the outer side of the opening in the top end of the valve cavity to block the valve cavity and an exhaust port.

8. The vacuum break resistant self-priming valve of claim 1 wherein: an external thread is arranged below the valve body, an internal thread matched with the valve cover is arranged on the valve cover, the valve cover and the valve body are fixedly connected through threads, and a sealing ring is arranged between the valve cover and the valve body.

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