Fluorine lining stop valve capable of achieving automatic compensation

Abstract

The utility model discloses a fluorine lining stop valve capable of achieving automatic compensation, and relates to the field of valve bodies. The fluorine lining stop valve capable of achieving automatic compensation comprises a stop valve body, a valve element part is arranged in the stop valve body, and an automatic compensation sealing part is arranged at the top end of the valve element part; the automatic compensation sealing piece comprises a sliding metal ring and a compensation sealing rubber ring, a main sealing rubber ring is fixedly arranged on the outer surface of the bottom end of the valve element piece, a sealing position is arranged in the stop valve body, the main sealing rubber ring is movably inserted into the sealing position, and the compensation sealing rubber ring makes contact with the top face of the sealing position. According to the fluorine lining stop valve capable of achieving automatic compensation, in the one-way flowing process of liquid in a pipeline, when lower reverse pressure difference occurs or a valve rod is not closed in place, and a valve element piece is not inserted in a sealing position in place, a sliding metal ring at the top of a metal valve block is tightly attached to the top of the sealing position under the action of gravity, upper water pressure and strong magnetic repulsive force; therefore, auxiliary sealing is achieved, and the situation of large-flow leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve body technical field, concretely is a fluorine lining stop valve of automatic compensation. BACKGROUND

[0002] The fluorine lining stop valve is a stop valve with a polytetrafluoroethylene lining on the inner wall, which realizes sealing and opening through the up-down movement of the internal valve core.

[0003] However, in actual use, when the reverse pressure difference of the pipeline internal loop occurs, the valve core is easily impacted, the contact part of the valve core and the sealing part is loose, and a large amount of leakage occurs. Therefore, a fluorine lining stop valve capable of automatic compensation is provided to effectively maintain sealing in the single-flow pipeline. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a fluorine lining stop valve capable of automatic compensation, which solves the problem of leakage caused by the impact of the valve core and the loosening of the contact part of the valve core and the sealing part when the reverse pressure difference of the pipeline internal loop occurs in actual use of the existing fluorine lining stop valve.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a fluorine lining stop valve capable of automatic compensation, comprising a stop valve body, a polytetrafluoroethylene lining is arranged on the inner wall of the stop valve body, a valve core piece is arranged in the stop valve body, an automatic compensation sealing piece is arranged at the top end of the valve core piece;

[0006] The automatic compensation sealing piece comprises a sliding metal ring slidingly arranged on the outer surface of the valve core piece and a compensation sealing rubber ring fixedly arranged on the outer surface of the sliding metal ring, a main sealing rubber ring is fixedly arranged on the outer surface of the bottom end of the valve core piece, a sealing position is arranged in the stop valve body, the main sealing rubber ring is movably inserted into the sealing position, the compensation sealing rubber ring is sleeved outside the main sealing rubber ring, and the compensation sealing rubber ring is in contact with the top surface of the sealing position.

[0007] Preferably, the stop valve body comprises a valve seat and flange connection pipes integrally formed on both sides of the stop valve body, and the inner ends of the two groups of flange connection pipes are located on the upper and lower sides of the sealing position.

[0008] Preferably, the top of the valve seat is fixedly installed with a valve cover, a valve rod is threadedly connected in the valve cover, and the bottom end of the valve rod is connected with the valve core piece.

[0009] Preferably, the valve core piece comprises a metal valve block rotatably connected to the bottom end of the valve stem and a metal hard sealing part integrally formed on the outer wall of the bottom end of the metal valve block, and the main sealing rubber ring is installed on the outer surface of the metal hard sealing part.

[0010] Preferably, the outer wall of the metal hard sealing part is provided with a plurality of annular grooves, and the inner wall of the main sealing rubber ring is provided with an annular protrusion which is movably clamped in the annular grooves.

[0011] Preferably, the sliding metal ring is slidably connected to the outer surface of the upper end of the metal valve block, the top of the sliding metal ring and the top end of the metal valve block are respectively provided with a first strong magnetic ring and a second strong magnetic ring, and the opposite sides of the first strong magnetic ring and the second strong magnetic ring repel each other.

[0012] Preferably, the metal hard sealing part and the compensation sealing rubber ring form a movable cavity, and the movable cavity becomes larger as the depth of the metal hard sealing part inserted into the sealing position becomes larger.

[0013] The utility model discloses a fluorine lining stop valve of automatic compensation, and has the beneficial effects as follows: the device is applied to the pipeline of one-way flow, and the flow direction is from top to bottom in the valve seat, an automatic compensation sealing piece is arranged on the top of the valve core piece, when the lower reverse pressure difference or the valve rod is not closed in place occurs in the one-way flow process of the liquid in the pipeline, causes the valve core piece to be not inserted in place in the sealing position, causes the leakage, the sliding metal ring on the top of the metal valve block is tightly attached to the top of the sealing position under the action of gravity, the upper water pressure and the strong magnetic repulsion, thereby realizing the auxiliary sealing, and avoiding the large flow leakage. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0015] Figure 1 It is the whole outer surface structure schematic diagram of the utility model;

[0016] Figure 2 It is the internal structure section view of the valve seat of the utility model;

[0017] Figure 3 It is the structure explosion drawing of the valve core piece and the automatic compensation sealing piece of the utility model;

[0018] Figure 4 It is the section view of the valve core piece and the automatic compensation sealing piece of the utility model.

[0019] As shown in the figure, 1, the main body of the stop valve; 11, the valve seat; 12, the valve rod; 13, the flange connecting pipe; 14, the polytetrafluoroethylene lining; 15, the valve cover; 2, the valve core; 21, the metal valve block; 22, the metal hard sealing part; 23, the main sealing rubber ring; 24, the annular groove; 25, the annular protrusion; 3, the automatic compensation sealing piece; 31, the sliding metal ring; 32, the compensation sealing rubber ring; 33, the first strong magnetic ring; 34, the second strong magnetic ring; 4, the movable cavity; 5, the sealing position. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model is described clearly and completely, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] The embodiments of the present application provide a fluorine-lined stop valve capable of automatic compensation, which solves the problem that the existing fluorine-lined stop valve is easily impacted when the reverse pressure difference in the pipeline loop occurs, the contact part of the valve core and the sealing part is loose, and a large amount of leakage occurs.

[0022] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings of the specification and the specific embodiments.

[0023] The embodiments of the utility model disclose a fluorine-lined stop valve capable of automatic compensation.

[0024] According to the drawings Figures 1-4 As shown in the figure, including the stop valve main body 1, the inner wall of the stop valve main body 1 is provided with the polytetrafluoroethylene lining 14, the inside of the stop valve main body 1 is provided with the valve core 2, the top end of the valve core 2 is provided with the automatic compensation sealing piece 3;

[0025] The automatic compensation sealing piece 3 includes the sliding metal ring 31 slidingly arranged on the outer surface of the valve core 2 and the compensation sealing rubber ring 32 fixedly arranged on the outer surface of the sliding metal ring 31, the bottom end outer surface of the valve core 2 is fixedly provided with the main sealing rubber ring 23, the inside of the stop valve main body 1 is provided with the sealing position 5, the main sealing rubber ring 23 is movably inserted in the sealing position 5, the compensation sealing rubber ring 32 is sleeved outside the main sealing rubber ring 23, and the compensation sealing rubber ring 32 is in contact with the top surface of the sealing position 5.

[0026] The device is applied to a one-way flow pipeline, the flow direction is from top to bottom in the valve seat 11, and the automatic compensation sealing element 3 is arranged on the top of the valve core element 2. When the lower reverse pressure difference or the valve rod 12 is not closed in place, the valve core element 2 is not inserted in place in the sealing position 5, and leakage occurs during the one-way flow of the liquid in the pipeline, the sliding metal ring 31 on the top of the metal valve block 21 is tightly attached to the top of the sealing position 5 under the action of gravity, the upper water pressure and the strong magnetic repulsive force, so as to realize auxiliary sealing and avoid large flow leakage.

[0027] The stop valve body 1 comprises a valve seat 11 and flange connection pipes 13 integrally formed on both sides of the stop valve body 1, and the inner ends of the two groups of flange connection pipes 13 are located on the upper and lower sides of the sealing position 5. The stop valve body 1 is applied to a one-way flow pipeline, and the medium in the pipeline flows from top to bottom in the valve seat 11.

[0028] The top of the valve seat 11 is fixedly installed with a valve cover 15, the valve cover 15 is threadedly connected with a valve rod 12, the bottom end of the valve rod 12 is connected with a valve core element 2, the valve core element 2 comprises a metal valve block 21 rotatably connected to the bottom end of the valve rod 12 and a metal hard sealing part 22 integrally formed on the outer wall of the bottom end of the metal valve block 21, and a main sealing rubber ring 23 is installed on the outer surface of the metal hard sealing part 22. By rotating the valve rod 12, the metal hard sealing part 22 and the main sealing rubber ring 23 are inserted into the sealing position 5 to realize extrusion sealing.

[0029] The outer wall of the metal hard sealing part 22 is provided with a plurality of annular grooves 24, and the inner wall of the main sealing rubber ring 23 is provided with an annular protrusion 25, the annular protrusion 25 is movably clamped in the annular groove 24, so as to improve the anti-skid effect of the connection between the metal hard sealing part 22 and the main sealing rubber ring 23.

[0030] The sliding metal ring 31 is slidably connected to the outer surface of the upper end of the metal valve block 21, the top of the sliding metal ring 31 and the top end of the metal valve block 21 are respectively fixedly provided with a first strong magnetic ring 33 and a second strong magnetic ring 34, the opposite sides of the first strong magnetic ring 33 and the second strong magnetic ring 34 repel each other, and in use, the repulsive force between the first strong magnetic ring 33 and the second strong magnetic ring 34 pushes the sliding metal ring 31 downward, and under the action of gravity and the pressure of the medium above, the compensation sealing rubber ring 32 is tightly attached to the top of the sealing position 5 to realize auxiliary sealing and avoid large flow leakage.

[0031] The metal hard sealing part 22 and the compensation sealing rubber ring 32 form a movable cavity 4, the movable cavity 4 becomes larger as the depth of the metal hard sealing part 22 inserted into the sealing position 5 becomes larger, and the movable cavity 4 ensures that the metal hard sealing part 22 can move upward in the sealing position 5, and the compensation sealing rubber ring 32 can still be tightly attached to the top of the sealing position 5.

[0032] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An automatically compensable fluorine-lined stop valve comprising a stop valve body (1), the inner wall of which is provided with a polytetrafluoroethylene inner lining (14), characterized in that, The inside of the stop valve body (1) is provided with a valve core (2), and the top end of the valve core (2) is provided with an automatic compensation sealing element (3); The automatic compensation sealing element (3) comprises a sliding metal ring (31) slidingly arranged on the outer surface of the valve core (2) and a compensation sealing rubber ring (32) fixedly arranged on the outer surface of the sliding metal ring (31), and the bottom end of the valve core (2) is fixedly provided with a main sealing rubber ring (23), the inside of the stop valve body (1) is provided with a sealing position (5), the main sealing rubber ring (23) is movably inserted into the sealing position (5), the compensation sealing rubber ring (32) is sleeved outside the main sealing rubber ring (23), and the compensation sealing rubber ring (32) is in contact with the top surface of the sealing position (5).

2. The self-compensating lined stop valve according to claim 1, characterized in that: The stop valve body (1) comprises a valve seat (11) and flange connecting pipes (13) integrally formed on both sides of the stop valve body (1), and the inner ends of the two groups of flange connecting pipes (13) are located on the upper and lower sides of the sealing position (5) respectively.

3. The self-compensating lined stop valve according to claim 2, characterized in that: The top of the valve seat (11) is fixedly provided with a valve cover (15), the valve cover (15) is threadedly connected with a valve rod (12), and the bottom end of the valve rod (12) is connected with the valve core (2).

4. The self-compensating lined stop valve of claim 1, wherein: The valve core (2) comprises a metal valve block (21) rotatably connected to the bottom end of the valve rod (12) and a metal hard sealing portion (22) integrally formed on the outer wall of the bottom end of the metal valve block (21), and the main sealing rubber ring (23) is arranged on the outer surface of the metal hard sealing portion (22).

5. The self-compensating lined stop valve according to claim 4, characterized in that: The outer wall of the metal hard sealing portion (22) is provided with a plurality of annular grooves (24), and the inner wall of the main sealing rubber ring (23) is provided with an annular protrusion (25), and the annular protrusion (25) is movably clamped in the annular groove (24).

6. The self-compensating lined globe valve of claim 4, wherein: The sliding metal ring (31) is slidingly connected to the outer surface of the upper end of the metal valve block (21), the top of the sliding metal ring (31) and the top end of the metal valve block (21) are respectively fixedly provided with a first strong magnetic ring (33) and a second strong magnetic ring (34), and the opposite sides of the first strong magnetic ring (33) and the second strong magnetic ring (34) repel each other.

7. The self-compensating lined stop valve of claim 5, wherein: An active cavity (4) is formed between the metal hard sealing portion (22) and the compensation sealing rubber ring (32), and the active cavity (4) becomes larger as the depth of the metal hard sealing portion (22) inserted into the sealing position (5) becomes larger.

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