CN211779096U - Automatic closing ball valve for overcurrent - Google Patents

Abstract

The utility model discloses an overcurrent automatic closing ball valve, which comprises a valve casing, wherein a valve core and a valve rod are arranged in the valve casing, a through hole is arranged on the valve core, the valve rod drives the valve core to rotate so as to open and close the valve, an automatic cutting device is arranged in the valve core, the automatic cutting device comprises a gasket, a support shaft inner core and a spring, and the spring is sleeved on the outer circle of the support shaft inner core; when the ball valve is normally opened, the gasket is limited by the barb structure under the action of the spring; when the pipeline is abnormal, the gasket slides with the inner core of the bracket shaft and fills the through hole of the valve core to block the communication between the medium inlet and the medium outlet. Because the corresponding automatic cut-off device assembly is additionally arranged in the ball body of the common ball valve, the ball valve can simultaneously play the roles of opening and closing the common ball valve and the role of the automatic cut-off device only by installing one ball valve in a pipeline, thereby reducing the installation cost of the pipeline and improving the safety and reliability of the pipeline.

Description

Automatic closing ball valve for overcurrent

Technical Field

The utility model relates to the technical field of valves, especially, relate to an overflow self-closing ball valve.

Background

At present, ball valves in civil and industrial pipelines are generally applied due to small volume and flexible use. However, the ball valve connected with the existing pipeline can only control the opening and closing of the valve in a manual mode, and if the ball valve is used, the flow rate of medium gas or liquid in the pipeline is abnormally changed due to some reason, unsafe factors can be caused, especially when flammable and explosive gas is used, if a rubber conveying pipe is cracked or falls off due to various reasons, the phenomenon can not be found in time, and unforeseen results can be caused. In order to solve the above problems, an automatic closing device is generally installed in a pipeline, but the automatic closing device also causes problems, such as increasing "leakage points" of the pipeline, easily reducing the flow rate of a pipeline medium, and the like, and increasing the cost, so that the automatic closing device is not an ideal solution.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to not enough among the prior art, provide one kind and make and take place unusual change when leading to the increase of conveying medium flow to exceed certain numerical value at conveying line, can realize self-closing in order to cut off a kind of overflowing self-closing ball valve of conveying medium route.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve: an automatic closing ball valve for overflowing comprises a valve shell, wherein a medium outlet and a medium inlet are formed in the valve shell, a valve core and a valve rod are arranged in the valve shell, a through hole is formed in the valve core, the valve rod drives the valve core to rotate so as to open and close the valve, an automatic cutting device and a barb structure are arranged in the valve core, and a central through hole is formed in the barb structure; the automatic cutting device comprises a gasket, a support shaft inner core and a spring, wherein the spring is sleeved on the outer circle of the support shaft inner core, the support shaft inner core and the spring penetrate through a central through hole in the barb structure and are in sliding connection with the barb structure, a groove is formed in the support shaft inner core, and the gasket is fixedly connected to the support shaft inner core through the groove; when the ball valve is normally opened, the gasket is limited by the barb structure under the action of the spring; when the pipeline is abnormal, the gasket slides with the inner core of the bracket shaft and fills the through hole of the valve core to block the communication between the medium inlet and the medium outlet.

Further optimize, the barb structure includes support, support axle, the number of support is 3, and evenly distributed is on support axle excircle surface.

Further optimize, the support shaft inside wall is equipped with the step piece, the one end that the gasket was kept away from to the support shaft inner core is equipped with the protrusion piece that is used for cooperating the step piece.

Preferably, a positioning structure matched with the barb structure is correspondingly arranged in the valve core, the positioning structure comprises a positioning groove and a positioning step, the positioning groove is arranged in the valve core, the positioning groove is located in the middle of the valve core, and the positioning step is located on one side, close to the gasket, of the valve core.

Further preferably, the end surface of the head of the support abuts against the positioning groove, and the end surface of the tail of the support abuts against the positioning step.

Further preferably, the gasket is a rubber piece or a fluorine plastic piece.

Further optimizing, still include the twist grip, the twist grip with the valve rod is connected, the case is the ball valve, the valve rod with case threaded connection.

The utility model discloses a concrete operating procedure as follows: when the rotary handle is rotated to enable the ball valve to be in a full-open state, a medium normally works through the medium inlet and the medium outlet.

Under initial condition, gasket fixed connection is in support axle inner core, and support axle inner core is in the barb structure under the effect of spring for the gasket is by 3 support restricted movements.

When the pipeline is abnormal and the airflow is increased suddenly, the pressure difference of the inlet end and the outlet end of the ball valve core is increased and acts on a gasket of the cutting device assembly, when the pressure difference of the inlet end and the outlet end exceeds the set value of the spring, the inner core of the support shaft overcomes the elastic force of the spring and moves towards the through hole, and the gasket is fixedly connected to the inner core of the support shaft and moves towards the through hole under the action of the elastic force of the spring, so that the through hole at one end of the ball valve core is pressed to block the medium inlet from being communicated with the medium outlet, and the effect of automatically closing the valve and cutting off the. Only when the pipeline returns to normal, the flow of the valve medium inlet is reduced, the air pressure at the inlet end and the outlet end of the valve is basically equal or the ball valve is closed and then the valve is opened again, and the gasket and the inner core of the support shaft can reset under the action of the spring.

The utility model has the advantages that: because the corresponding automatic cut-off device assembly is additionally arranged in the ball body of the common ball valve, the ball valve can simultaneously play the roles of opening and closing the common ball valve and the role of the automatic cut-off device only by installing one ball valve in a pipeline, thereby reducing the installation cost of the pipeline and improving the safety and reliability of the pipeline.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will discuss the drawings required to be used in the description of the embodiments or the prior art, it is obvious that the technical solutions described in conjunction with the drawings are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings thereof can be obtained according to the embodiments shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of the automatic closing ball valve for overcurrent.

Fig. 2 is an enlarged view of the structure of the automatic cutting device assembly of the present invention.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a top view of fig. 2.

In the figure, a valve casing 1, a medium inlet 101, a medium outlet 102, a valve core 2, a through hole 201, a valve rod 3, a barb structure 4, a central through hole 41, a support 42, a support shaft 43, a gasket 5, a support shaft inner core 6, a groove 61, a spring 7, a step block 8, a positioning groove 9, a positioning step 10, a rotating handle 11, a seal seat 12, a seal ring 13 and a protruding block 14.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments described in the present disclosure, all other embodiments obtained by a person skilled in the art without creative efforts are within the scope of the present disclosure.

The automatic closing ball valve overflows adopts a ball valve core 2 with a hole in the middle as a valve core 2, and a rotating handle 11 drives the ball valve core 2 to rotate through a valve rod 3 so as to open and close the valve. Ball valve core 2 both ends are equipped with seal receptacle 12, form sealed vice with the cooperation of ball valve core 2, and two seal receptacles 12 are located valve casing 1, and the protrusion end connection of valve rod 3 is in the inslot in other holes of ball valve core 2 perpendicular to with the transmission moment of torsion, and valve rod 3 realizes sealing through arranging in wherein two O type sealing washer 13 between valve casing 1, and the aforesaid is prior art.

The embodiment of the utility model provides an overcurrent automatic closing ball valve, including valve casing 1, be equipped with medium outlet 102 and medium import 101 on the valve casing 1, be equipped with case 2, valve rod 3 in the valve casing 1, be equipped with through-hole 201 on the case 2, the valve rod 3 drives the case 2 rotates to open and close the valve, be equipped with automatic cutting device, barb structure 4 in the case 2, be equipped with central through-hole 41 on barb structure 4; the automatic cutting device comprises a gasket 5, a support shaft inner core 6 and a spring 7, wherein the spring 7 is sleeved on the excircle of the support shaft inner core 6, the support shaft inner core 6 and the spring 7 penetrate through a central through hole 41 in the barb structure 4 and are in sliding connection with the barb structure 4, a groove 61 is formed in the support shaft inner core 6, and the gasket 5 is fixedly connected to the support shaft inner core 6 through the groove 61; when the ball valve is normally opened, the gasket 5 is limited by the barb structure 4 under the action of the spring 7; when the pipeline is abnormal, the gasket 5 and the support shaft inner core 6 slide and fill the through hole 201 of the valve core 2 to block the communication between the medium inlet 101 and the medium outlet 102.

The barb structure 4 comprises a support 42 and a support shaft 43, wherein the number of the supports 42 is 3, and the supports are uniformly distributed on the outer circle surface of the support shaft 43. The barb structure 4 only allows the installation and does not allow the extraction, and the inner side of the inlet end of the ball valve core 2 is provided with a filter screen.

Step blocks 8 are arranged on the inner side wall of the support shaft 43, and a protruding block 14 used for being matched with the step blocks 8 is arranged at one end, far away from the pad 5, of the inner core of the support shaft 43. In order to prevent the excessive sliding of the support shaft core 6 and the spacer 5 to the through hole 201, the protruding block 14 and the step block 8 are provided to limit the sliding distance within a certain distance.

The valve core 2 is correspondingly provided with a positioning structure matched with the barb structure 4, the positioning structure comprises a positioning groove 9 and a positioning step 10 which are arranged in the valve core 2, the positioning groove 9 is positioned in the middle of the valve core 2, and the positioning step 10 is positioned on one side of the valve core 2 close to the gasket 5.

The end surface of the head of the bracket is abutted against the positioning groove 9, and the end surface of the tail of the bracket is abutted against the positioning step 10.

The gasket 5 is a rubber piece or a fluorine plastic piece.

The valve core 2 is a ball valve, and the valve rod 3 is in threaded connection with the valve core 2.

The utility model discloses a concrete operating procedure as follows: when the ball valve is in a full-open state by rotating the rotating handle 11, a medium passes through gaps between the medium inlet 101 and the 3 supports 42 and the medium outlet 102 to normally work.

The pressure difference value of the spring 7 is preset, when the pipeline is abnormal and the airflow is increased suddenly, the pressure difference of the inlet end and the outlet end of the ball valve core 2 is increased, the pressure difference acts on the gasket 5 of the cutting device assembly, when the pressure difference of the inlet end and the outlet end exceeds the value set by the spring 7, the support shaft inner core 6 overcomes the elastic force of the spring 7 and moves towards the through hole 201, and the gasket 5 is fixedly connected to the support shaft inner core 6 and moves towards the through hole 201 under the action of the elastic force of the spring 7, so that the through hole 201 at one end of the ball valve core 2 is pressed to be communicated with the medium outlet 102 through the medium inlet 101, and the effect of automatically closing the valve and. Only when the pipeline is recovered to be normal, the flow of the valve medium inlet 101 is reduced, the air pressure at the inlet end and the outlet end of the valve is basically equal or the ball valve is closed and then is opened again, and the gasket 5 and the support shaft inner core 6 can be reset under the action of the spring 7.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The utility model provides an automatic closing ball valve overflows, includes the valve casing, is equipped with medium outlet and medium import on the valve casing, be equipped with case, valve rod in the valve casing, be equipped with the through-hole on the case, the valve rod drives the case rotates to open and close valve, its characterized in that: an automatic cutting device and a barb structure are arranged in the valve core, and a central through hole is formed in the barb structure; the automatic cutting device comprises a gasket, a support shaft inner core and a spring, wherein the spring is sleeved on the outer circle of the support shaft inner core, the support shaft inner core and the spring penetrate through a central through hole in the barb structure and are in sliding connection with the barb structure, a groove is formed in the support shaft inner core, and the gasket is fixedly connected to the support shaft inner core through the groove; when the ball valve is normally opened, the gasket is limited by the barb structure under the action of the spring; when the pipeline is abnormal, the gasket slides with the inner core of the bracket shaft and fills the through hole of the valve core to block the communication between the medium inlet and the medium outlet.

2. The excessive flow automatic shutoff ball valve of claim 1, characterized in that: the barb structure includes support, support axle, the number of support is 3, and evenly distributed is on support axle excircle surface.

3. The excessive flow automatic shutoff ball valve of claim 2, characterized in that: the inside wall of the support shaft is provided with step blocks, and one end, far away from the gasket, of the inner core of the support shaft is provided with a protruding block used for being matched with the step blocks.

4. The excessive flow automatic shutoff ball valve of claim 1, characterized in that: and a positioning structure matched with the barb structure is correspondingly arranged in the valve core, the positioning structure comprises a positioning groove and a positioning step, the positioning groove is arranged in the valve core, the positioning groove is positioned in the middle of the valve core, and the positioning step is positioned on one side, close to the gasket, of the valve core.

5. The excessive flow automatic shutoff ball valve of claim 4, characterized in that: the end surface of the head of the support abuts against the positioning groove, and the end surface of the tail of the support abuts against the positioning step.

6. The excessive flow automatic shutoff ball valve of claim 1, characterized in that: the gasket is a rubber piece or a fluorine plastic piece.

7. The excessive flow automatic shutoff ball valve of claim 1, characterized in that: the rotary valve further comprises a rotary handle, the rotary handle is connected with the valve rod, the valve core is a ball valve, and the valve rod is in threaded connection with the valve core.

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