Leakage-proof valve

Abstract

The utility model discloses a leakproof valve which comprises a valve body, a connecting cylinder is fixedly connected to the valve body, at least two sealing pieces are fixedly connected to the inner wall of the connecting cylinder, a gap is formed between the two sealing pieces, a valve element matched with the sealing pieces is installed in the valve body, and the valve element is matched with the gap to form a cavity. The valve body is fixedly connected with an indicator used for prompting water leakage of the sealing piece, a connecting pipe is connected between the cavity and the indicator, the indicator comprises a mounting seat, the mounting seat is fixedly connected to the upper end of the valve body, the mounting seat is fixedly connected with a hollow column, and a foam block matched with the inner wall of the hollow column is slidably connected into the hollow column. Compared with the prior art, the leakage-proof valve has the advantages that when leakage occurs at the sealing position between the valve body and the valve rod, a prompt can be given, maintenance personnel can be helped to find the leakage problem of the valve, and the situation that the valve leaks water due to the fact that a sealing piece in the valve body is damaged is avoided as far as possible.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, and specifically relates to a leakproof valve. BACKGROUND

[0002] With the wide application of valves in industrial production, the sealing performance is crucial to the stability and reliability of system operation. However, the sealing part of the valve, including the valve stem, valve core and the sealing element thereof and the valve body, is easily affected by friction, wear and environmental factors during use, resulting in a decline in sealing effect and further causing water leakage problems.

[0003] Especially during maintenance, due to limited viewing angle and insufficient technical means, maintenance personnel have difficulty in thoroughly checking the sealing element inside the valve, especially at the key position of controlling the opening and closing of the valve, and the sealing element is prone to looseness or damage. In addition, as the service life of the valve increases, the degree of wear of the sealing element gradually increases. The friction generated by the long-term operation of the valve stem and the sealing element will gradually wear the sealing element, resulting in a loss of sealing effect.

[0004] Due to the difficulty of existing maintenance and repair means in effectively positioning and checking the sealing element inside the valve body, maintenance personnel often cannot timely discover problems and take corresponding measures. This gradually accumulated wear will eventually cause more serious water leakage problems of the valve, and eventually affect the normal operation of the system.

[0005] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general background of the application, and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is already known to those of ordinary skill in the art. SUMMARY

[0006] The utility model aims at providing a leakproof valve which can solve the technical problems raised in the above background.

[0007] In order to achieve the above-mentioned purpose, the technical scheme provided by a specific embodiment of the utility model is as follows:

[0008] A leakproof valve comprises a valve body, a connecting barrel fixedly connected to the valve body, at least two sealing elements fixedly connected to the inner wall of the connecting barrel, a gap formed between the two sealing elements, a valve core matched with the sealing elements installed in the valve body, a cavity formed by the cooperation of the valve core and the gap, an indicator fixedly connected to the valve body for prompting water leakage of the sealing element, and a connecting pipe connected between the cavity and the indicator.

[0009] In one or more embodiments of the utility model, the indicator comprises a mounting seat, the mounting seat is fixedly connected to the upper end of the valve body, a hollow column is fixedly connected to the mounting seat, and a foam block matched with the inner wall of the hollow column is slidably connected in the hollow column.

[0010] In one or more embodiments of the utility model, a transparent panel is fixedly connected to the hollow column.

[0011] In one or more embodiments of the utility model, the connecting pipe comprises a first connecting pipe, one end of the first connecting pipe is communicated with the cavity, a rubber capsule is fixedly connected to the other end of the first connecting pipe, the rubber capsule is located above the plurality of sealing members, a three-way joint is fixedly connected to the first connecting pipe, and a second connecting pipe is installed between the three-way joint and the hollow column.

[0012] In one or more embodiments of the utility model, an annular groove matched with the rubber capsule is formed in the valve core.

[0013] In one or more embodiments of the utility model, a one-way valve matched with the rubber capsule is installed on the first connecting pipe.

[0014] In one or more embodiments of the utility model, a first drain pipe is fixedly connected to the rubber capsule, and a first sealing cover is fixedly connected to the first drain pipe.

[0015] In one or more embodiments of the utility model, a second sealing cover matched with the connecting cylinder is fixedly connected to the valve body, and one end of the valve core passes through the second sealing cover and is located in the interior of the valve body.

[0016] In one or more embodiments of the utility model, a valve rod matched with the valve body is fixedly connected to one end of the valve core located in the interior of the valve body.

[0017] In one or more embodiments of the utility model, a sealing gasket is fixedly connected to the second sealing cover.

[0018] Compared with the prior art, the anti-leakage valve can give a prompt when leakage occurs at the sealing position between the valve body and the valve rod, help maintenance personnel find the problem of valve leakage, and avoid the situation of valve water leakage due to damage of the sealing member in the valve body as much as possible. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described in the following are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a structure schematic view of a leakage-proof valve in an embodiment of the present application.

[0021] Figure 2 It is a sectional view of a leakage-proof valve in an embodiment of the present application.

[0022] Figure 3 It is a sectional view of a leakage-proof valve in an embodiment of the present application.

[0023] Figure 4 It is Figure 3 structure schematic view of A in the embodiment.

[0024] Figure 5 It is a structure schematic view of an indicator in an embodiment of the present application.

[0025] Main drawing mark explanation:

[0026] 1, valve body; 101, connecting cylinder; 2, valve core; 3, valve rod; 301, annular groove; 4, first sealing element; 5, second sealing element; 6, cavity; 7, first connecting pipe; 8, rubber capsule; 9, first drain pipe; 10, first sealing cover; 11, second sealing cover; 1101, sealing gasket; 12, indicator; 13, mounting seat; 14, hollow column; 15, transparent panel; 16, foam block; 17, second connecting pipe; 18, tee joint. DETAILED DESCRIPTION

[0027] In order to make the person skilled in the art better understand the technical schemes in the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical schemes in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0028] As Figures 1-3As shown, the utility model discloses an embodiment of a leakproof valve, including valve body 1, the fixed connection of valve body 1 has connecting barrel 101, connecting barrel 101 and valve body 1 are integrally formed. The inner wall of connecting barrel 101 is fixedly connected with several groups of sealing pieces, and valve stem 3 is rotatably connected in connecting barrel 101, valve stem 3 is fixedly connected with the valve core 2 matched with valve body 1, and valve core 2 is located in the inside of valve body 1. Wherein, the inner wall of valve stem 3, connecting barrel 101 and sealing piece are interference fit, and the leakage condition of liquid between valve body 1 and valve stem 3 can be avoided as far as possible through sealing piece.

[0029] As Figures 1-4 As shown, connecting barrel 101 is fixedly connected with the second sealing cover 11 matched with valve core 2, and the second sealing cover 11 is fixedly connected with the valve core 2 matched with sealing pad 1101. When replacing valve core 2 or replacing sealing piece, the second sealing cover 11 can be removed, and then the valve core 2 is taken out from connecting barrel 101, so that the replacement of sealing piece and valve core 2 is realized.

[0030] As Figures 1-4 As shown in the embodiment, the sealing piece includes first sealing piece 4 and second sealing piece 5, and the first sealing piece 4 and the second sealing piece 5 have a gap therebetween, and cooperate with the valve stem 3 to form a cavity 6. The valve body 1 is fixedly connected with a connecting pipe matched with the cavity 6, and the connecting pipe is provided with an indicator 12 at the end away from the connecting barrel 101. When the sealing piece is damaged, the liquid leaks to the cavity 6, and since the liquid in the valve has a certain pressure, the liquid enters the indicator 12 through the connecting pipe, so that the liquid in the indicator 12 is viewed by the staff, so as to judge that the valve has leaked, so as to carry out targeted maintenance on the valve, so as to reduce the loss caused by long-time leakage of the valve, and to ensure the normal operation of the transportation system as far as possible.

[0031] As Figures 1-5 As shown, the indicator 12 includes a mounting seat 13 fixedly connected to the upper end of the valve body 1, and the mounting seat 13 is fixedly connected with a hollow column 14, and the hollow column 14 is slidably connected with a foam block 16 matched with the inner wall thereof, and the connecting pipe is used to connect the cavity 6 and the hollow column 14. The liquid enters the hollow column 14 from the cavity 6, and the foam block 16 floats upward due to buoyancy, and the staff can judge that the sealing piece of the valve needs to be maintained after seeing the position change of the foam block 16.

[0032] Specifically, as Figure 5As shown, the hollow column 14 is fixedly connected with a transparent panel 15, the initial position of the foam block 16 is located at the lower end of the transparent panel 15, under normal visual angle, the staff cannot easily see the foam block 16, after the liquid enters the hollow column 14, the position of the foam block 16 rises to the position matched with the transparent panel 15, at this time, the staff can observe the change of the foam block 16 to judge that the valve needs to be maintained more deeply. Among them, the foam block 16 can be a red, green and other color bright floating block, which is convenient for the staff to check.

[0033] As shown in the figure, Figures 1-5 As shown, the connecting pipe includes a first connecting pipe 7, the first connecting pipe 7 is fixedly connected with a three-way joint 18, and the three-way joint 18 and the hollow column 14 are installed with a second connecting pipe 17. The liquid in the cavity 6 enters the hollow column 14 through the first connecting pipe 7, the three-way joint 18 and the second connecting pipe 17.

[0034] As shown in the figure, Figures 1-5 As shown, the end of the first connecting pipe 7 away from the cavity 6 is fixedly connected with a rubber capsule 8, the rubber capsule 8 is annular, fixedly connected on the inner wall of the connecting cylinder 101, and the rubber capsule 8 is generally located above the plurality of sealing members. When the rubber capsule 8 is in the inflated\liquid state, one side wall of the rubber capsule 8 can be in contact with the outer wall of the valve stem 3.

[0035] Specifically, as shown in the figure, Figures 1-5 As shown, an annular groove 301 matched with the rubber capsule 8 is formed on the valve stem 3, in the initial state, one side wall of the rubber capsule 8 is not in contact with the valve stem 3, when the first sealing member 4 is damaged and the liquid is located in the cavity 6, the high pressure environment in the valve makes the liquid enter the rubber capsule 8 through the first connecting pipe 7, thereby filling the rubber capsule 8 with liquid. One side wall of the rubber capsule 8 is located in the annular groove 301, and is in interference fit with the annular groove 301. In this way, the friction between the rubber capsule 8 and the valve stem 3 in normal use can be reduced, thereby affecting the sealing effect. The rubber capsule 8 is located in the annular groove 301, and the sealing effect between the rubber capsule 8 and the valve stem 3 is ensured to a great extent through the limiting of the annular groove 301.

[0036] Among them, the first connecting pipe 7 is fixedly connected with a one-way valve matched with the rubber capsule 8, which is not shown in the figure, the one-way valve can ensure that the liquid will not backflow after entering the rubber capsule 8.

[0037] As shown in the figure, Figure 4 As shown, the rubber capsule 8 is fixedly connected with a first drain pipe 9, the first drain pipe 9 is threadedly connected with a first sealing cover 10, the liquid in the rubber capsule 8 is discharged through the first drain pipe 9, and one side wall of the rubber capsule 8 is away from the valve stem 3, so as to reduce the excessive friction between the rubber capsule 8 and the valve stem 3 in the normal use state.

[0038] The working principle of the utility model is that: there is liquid flowing in the valve, the valve rod 3 rubs with the sealing element in the process of multiple rotations, with the increase of use time, the sealing element will also age, thereby causing the liquid to leak from between the valve rod 3 and the connecting cylinder 101. After the liquid leaks, the liquid is located in the cavity 6, the liquid in the cavity 6 is in a high pressure state, the liquid in the high pressure state will first enter the rubber capsule 8 through the first connecting pipe 7, the rubber capsule 8 is expanded by the liquid, so that one end of the rubber capsule 8 is located in the annular groove 301, to form a new sealing element. To realize sealing compensation, reduce the loss caused by the continuous outflow of liquid.

[0039] When the liquid enters the first connecting pipe 7, part of the liquid will also enter the hollow column 14 through the tee joint 18 and the second connecting pipe 17, after the hollow column 14 has liquid, due to the existence of buoyancy, the foam block 16 will rise and completely cover the transparent panel 15, the worker sees the foam block 16 located at the transparent panel 15, can judge that the sealing element in the valve has leaked, needs to be replaced or repaired in depth.

[0040] It is apparent for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or essential characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0041] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A leak-proof valve, characterized in that, Include: Valve body, the valve body is fixedly connected with connecting barrel, the inner wall of connecting barrel is fixedly connected with at least two sealing elements, the gap is formed between two sealing elements, the valve body is installed with valve core matched with sealing element, the valve core cooperates with gap and forms cavity; The valve body is fixedly connected with an indicator for prompting the sealing element to leak water, and a connecting pipe is connected between the cavity and the indicator.

2. A leak-proof valve according to claim 1, wherein The indicator includes a mounting seat fixedly connected to the upper end of the valve body, a hollow column fixedly connected to the mounting seat, and a foam block slidingly connected to the inner wall of the hollow column.

3. A leak-proof valve according to claim 2, wherein The hollow column is fixedly connected with a transparent panel.

4. A leak-proof valve according to any one of claims 1 to 3, wherein The connecting pipe includes a first connecting pipe, one end of the first connecting pipe is communicated with the cavity, the other end of the first connecting pipe is fixedly connected with a rubber capsule, and the rubber capsule is located above the plurality of sealing elements. A three-way joint is fixedly connected to the first connecting pipe, and a second connecting pipe is installed between the three-way joint and the hollow column.

5. A leak-proof valve according to claim 4, wherein An annular groove matched with the rubber capsule is formed in the valve core.

6. A leak-proof valve according to claim 4, wherein A one-way valve matched with the rubber capsule is installed on the first connecting pipe.

7. A leak-proof valve according to claim 6, wherein A first drain pipe is fixedly connected to the rubber capsule, and a first sealing cover is fixedly connected to the first drain pipe.

8. A leak-proof valve according to claim 1, wherein A second sealing cover matched with the connecting barrel is fixedly connected to the valve body, and one end of the valve core passes through the second sealing cover and is located in the interior of the valve body.

9. A leak-proof valve according to claim 8, wherein A valve rod matched with the valve body is fixedly connected to one end of the valve core located in the interior of the valve body.

10. A leak-proof valve according to claim 9, wherein A sealing gasket is fixedly connected to the second sealing cover.

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