Leakage-proof shaft seal device of double-eccentric hard-seal high-temperature butterfly valve

Abstract

The utility model relates to the technical field of valves, and discloses a leakproof shaft seal device of a double-eccentric hard-seal high-temperature butterfly valve, which comprises a valve body, an opening and closing component used for clamping is rotatably connected in the valve body, an external connection block is fixedly connected outside the valve body, a sleeve is fixedly connected in the external connection block, and an opening and closing component used for clamping is fixedly connected in the sleeve. The inner wall of the sleeve is fixedly connected with a plurality of guide columns, the exteriors of the guide columns are sleeved with extrusion springs respectively, one sides of the exteriors of the extrusion springs are fixedly connected with taper pipes, and the inner walls of the taper pipes are fixedly connected with clamping rings. According to the utility model, the control of fluid is realized through the stability of the valve rod and the flexible opening and closing of the valve plate, and meanwhile, when the valve rod is fixed in the taper pipe, the plurality of guide columns are matched with the extrusion spring, so that the guiding and supporting capabilities are provided, the valve rod is prevented from deviating, and the valve rod can still run reliably under harsh conditions; and the safety and the effectiveness of fluid control are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially relates to double eccentric hard sealing high temperature butterfly valve's anti -leakage shaft seal device. BACKGROUND

[0002] Double eccentric hard sealing high temperature butterfly valve's anti -leakage shaft seal device is a kind of device specially designed to ensure that under high temperature and high pressure conditions, the sealing performance and operating stability of valve, by the rotation center of valve stem and valve piece is offset, reduce the friction between valve piece and valve seat, reduce the wear of sealing surface, improve sealing performance, so in the process of preventing leakage is also very important.

[0003] Usually double eccentric hard sealing high temperature butterfly valve's anti -leakage shaft seal device is by valve stem, valve piece, valve body etc. are formed, thus in use double eccentric hard sealing high temperature butterfly valve's anti -leakage shaft seal device is controlled valve piece opening and closing by the rotary motion of valve stem, to adjust the flow of fluid. The hard sealing design between valve piece and valve seat ensures reliable sealing under high temperature and high pressure conditions, enhances the sealing performance and stability of valve.

[0004] But part of device in prior art, due to the lack of effective fixing measures of the sealing structure of valve stem tail end, lead to displacement or vibration of valve stem in the process of valve opening and closing, thereby causing the poor contact between sealing ring and valve seat, further cause fluid leakage problem, for this double eccentric hard sealing high temperature butterfly valve's anti -leakage shaft seal device is proposed to solve the above problems. INVENTION CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides double eccentric hard sealing high temperature butterfly valve's anti -leakage shaft seal device, aims at improving the problem that part of device in prior art cannot fix the tail end of valve stem and lead to leakage.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0007] Double eccentric hard sealing high temperature butterfly valve's anti -leakage shaft seal device, including valve body, the inside rotation of valve body is connected with the opening and closing assembly for clamping, the outside fixed connection of valve body has external block, the inside fixed connection of external block has sleeve pipe, the inner wall of sleeve pipe is fixedly connected with multiple guide columns, the outer part of multiple guide columns is respectively equipped with extrusion spring, the outside one side of multiple extrusion springs is fixedly connected with the taper pipe, the inner wall of taper pipe is fixedly connected with clamping ring;

[0008] As further description of the above technical scheme:

[0009] The opening and closing assembly includes a valve rod, the inside of the valve body is rotationally connected to the outside of the valve rod, the valve piece is fixedly connected to the outside of the valve rod, and the alignment ring is fixedly connected to the outside of the valve rod.

[0010] As a further description of the above technical solution:

[0011] The outside of the valve rod is fixedly connected with a connecting block, and the top of the connecting block is fixedly connected with a fixed ring.

[0012] As a further description of the above technical solution:

[0013] The inside of the fixed ring is provided with a plurality of alignment holes, and the outside of the valve rod is coupled with a rotating ring.

[0014] As a further description of the above technical solution:

[0015] The outside of the rotating ring is fixedly connected with a connecting rod, and the bottom of the connecting rod is fixedly connected with a clamping rod.

[0016] As a further description of the above technical solution:

[0017] The outside of the taper pipe is in the inside of the sleeve pipe, and the outside of the clamping ring is on the top of the plurality of guide columns.

[0018] The utility model has the advantages of:

[0019] 1、The utility model discloses a valve rod's stability and valve piece's flexible opening and closing realize the control of fluid, and when the valve rod is fixed in the inside of the taper pipe, the cooperation of the plurality of guide columns and extrusion spring provides the guiding and supporting capacity, effectively resists the fluid pressure, prevents the valve rod from deviating, makes it still can reliably run under the rigorous condition, guarantees the safety and the effectiveness of fluid control.

[0020] 2、The utility model discloses a stable connecting block and flexible alignment hole design, thereby improving the accuracy of operation. The safety anti -drop function of rotating ring and the observation design of clamping rod make the operator can real -time monitoring the opening and closing state of valve piece, further strengthen the safety and convenience of operation. The coordinated cooperation of overall structure optimizes the control of fluid flow, and facilitates observation. DRAWINGS

[0021] Figure 1 The utility model provides a three -dimensional schematic view of the anti -leakage shaft seal device of double eccentric hard sealing high -temperature butterfly valve;

[0022] Figure 2 The utility model provides a guide column structure diagram of the anti -leakage shaft seal device of double eccentric hard sealing high -temperature butterfly valve;

[0023] Figure 3 The structure diagram of the alignment hole of the anti-leakage shaft sealing device of the double eccentric hard sealing high temperature butterfly valve is shown in the figure.

[0024] Figure 4 The structure diagram of the alignment hole of the anti-leakage shaft sealing device of the double eccentric hard sealing high temperature butterfly valve is shown in the figure.

[0025] Legend:

[0026] 1, valve body; 2, valve rod; 3, valve piece; 4, external block; 5, connecting block; 6, sleeve; 7, guide column; 8, extrusion spring; 9, cone pipe; 10, clamping ring; 11, alignment ring; 12, fixed ring; 13, alignment hole; 14, rotating ring; 15, connecting rod; 16, clamping rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Reference Figure 2 and Figure 3The utility model provides a kind of anti-leakage shaft seal device of double eccentric hard sealing high temperature butterfly valve of an embodiment provided by the utility model, including valve body 1, the inside rotation of valve body 1 is connected with the open-close component for clamping, open-close component includes valve stem 2, its design can provide good rotating ability, the outside rotation of valve stem 2 is connected with the inside of valve body 1, the outside fixed connection of valve stem 2 has alignment ring 11, its design can provide good clamping ability, the outside fixed connection of valve stem 2 has valve piece 3, by valve stem 2 drive valve piece 3 rotation can make valve piece 3 open and close, alignment ring 11 clamps in the inside of taper pipe 9, the outside fixed connection of valve body 1 has external block 4, by external block 4 can provide good protective effect to the outside one side of valve stem 2, the inside fixed connection of external block 4 has sleeve pipe 6, its design can provide good placement environment for valve stem 2, the inner wall fixed connection of sleeve pipe 6 has multiple guide columns 7, its design can provide good guiding ability, the outside of multiple guide columns 7 is respectively equipped with extrusion spring 8, by extrusion spring 8 can provide good extrusion ability, the outside one side fixed connection of multiple extrusion springs 8 has taper pipe 9, its design can provide good limiting ability for valve stem 2, while the top ring of taper pipe 9 can provide good sealing ability in the inside of valve body 1, the inner wall fixed connection of taper pipe 9 has clamping ring 10, its design can provide good clamping ability, by clamping ring 10 can fixed alignment ring 11 so that drive valve stem 2 clamps in the inside of taper pipe 9, the outside of taper pipe 9 is in the inside of sleeve pipe 6, the outside of clamping ring 10 is in the top of multiple guide columns 7.

[0029] Refer to Figure 1 And Figure 4 The outside fixed connection of valve stem 2 has connecting block 5, its design can provide good connecting ability, the top fixed connection of connecting block 5 has fixed ring 12, its design can stably place ability, multiple alignment holes 13 are arranged in the inside of fixed ring 12, its design can provide good sliding ability, the outside coupling connection of valve stem 2 has rotating ring 14, its design makes rotating ring 14 can slide and rotate by valve stem 2, simultaneously by the effect of valve stem 2 can prevent rotating ring 14 from falling off, the outside fixed connection of rotating ring 14 has connecting rod 15, its design can provide good connecting ability, the bottom fixed connection of connecting rod 15 has clamping rod 16, by clamping rod 16 can slide in the inside of different alignment holes 13, so that can conveniently observe the angle of handle rotation.

[0030] Working principle: when the valve stem 2 is rotated by external driving, the movement of the valve stem 2 drives the valve disc 3 to open and close, thereby adjusting the on-off of the fluid. The engagement of the alignment ring 11 with the inside of the taper pipe 9 ensures the stability and accuracy of the valve stem 2, preventing it from deviating during operation. The outside of the valve stem 2 is protected by the external block 4, ensuring safety in high-temperature and high-pressure environments. The sleeve 6 provides a good placement environment for the valve stem 2 and provides guiding support through multiple guide columns 7, ensuring that the valve stem 2 remains stable when rotating. The extrusion spring 8 outside each guide column 7 provides the necessary extrusion force, helping the valve stem 2 to remain in the correct position and resist fluid pressure. The design of the taper pipe 9 not only limits the movement of the valve stem 2, but also forms a good seal inside the valve body 1, preventing fluid leakage. The annular structure at the top of the taper pipe 9 tightly fits with the valve body 1, forming a sealed interface. The engagement ring 10 on the inner wall further enhances the fixation of the alignment ring 11, ensuring the stability of the valve stem 2 inside the taper pipe 9. Through this series of coordinated actions, the anti-leakage shaft seal device can ensure smooth and stable operation of the butterfly valve under high temperature and high pressure conditions, effectively preventing fluid leakage, thereby achieving safe and reliable fluid control;

[0031] When the valve stem 2 is rotated, the connecting block 5 provides stable support through its fixed connection, ensuring that the movement of the valve stem 2 is not disturbed. The multiple alignment holes 13 inside the fixed ring 12 allow sliding, allowing the valve stem 2 to remain flexible during rotation. The rotating ring 14 is coupled to the valve stem 2 and can smoothly slide and rotate, and the design to prevent falling ensures the safety of the rotating ring 14 during operation. At the same time, the connecting rod 15 is fixedly connected with the engagement rod 16 at the bottom, and the engagement rod 16 can slide in the alignment hole 13 of the fixed ring 12. This design allows the operator to easily observe the rotation angle of the handle, thereby accurately controlling the opening and closing state of the valve disc 3. Through the rotation of the valve stem 2, precise adjustment of fluid flow is achieved, ensuring the convenience and safety of operation.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent substitution, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A leakage-proof shaft sealing device of a double eccentric hard sealing high temperature butterfly valve, comprising a valve body (1), characterized in that: The inside of the valve body (1) is rotationally connected with an opening and closing assembly for clamping, the outside of the valve body (1) is fixedly connected with an external block (4), the inside of the external block (4) is fixedly connected with a sleeve (6), the inner wall of the sleeve (6) is fixedly connected with a plurality of guide columns (7), the outside of a plurality of the guide columns (7) is respectively sleeved with an extrusion spring (8), the outside of a plurality of the extrusion springs (8) is fixedly connected with a tapered pipe (9) on one side, the inner wall of the tapered pipe (9) is fixedly connected with a clamping ring (10).

2. The leak-proof shaft seal assembly of a double eccentric hard-seated high-temperature butterfly valve according to claim 1, characterized in that: The opening and closing assembly comprises a valve rod (2), the outside of the valve rod (2) is rotationally connected with the inside of the valve body (1), the outside of the valve rod (2) is fixedly connected with a positioning ring (11), the outside of the valve rod (2) is fixedly connected with a valve piece (3), the positioning ring (11) is clamped in the inside of the tapered pipe (9).

3. The leak-proof shaft seal assembly of a double eccentric hard-seated high-temperature butterfly valve according to claim 1, wherein: The outside of the valve rod (2) is fixedly connected with a connecting block (5), the top of the connecting block (5) is fixedly connected with a fixed ring (12).

4. The leak-proof shaft seal assembly of a double eccentric hard-seated high-temperature butterfly valve according to claim 3, characterized in that: The inside of the fixed ring (12) is provided with a plurality of positioning holes (13), the outside of the valve rod (2) is coupled with a rotating ring (14).

5. The leak-proof shaft seal assembly of a double eccentric hard-seated high-temperature butterfly valve according to claim 4, characterized in that: The outside of the rotating ring (14) is fixedly connected with a connecting rod (15), the bottom of the connecting rod (15) is fixedly connected with a clamping rod (16).

6. The leak-proof shaft seal assembly of a double eccentric hard-seated high-temperature butterfly valve according to claim 1, wherein: The outside of the tapered pipe (9) is in the inside of the sleeve (6), the outside of the clamping ring (10) is on the top of a plurality of the guide columns (7).

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