High-performance ball valve with filler sealing structure

Abstract

The utility model discloses a high-performance packing seal structure ball valve which comprises a valve body platform and a packing box, the packing box is arranged at the upper end of the valve body platform, self-sealing packing is arranged on the inner wall of the packing box, a bolt S and a nut S are installed in the packing box, and a valve rod is connected in the self-sealing packing and the packing box in a penetrating mode. A packing gland is installed in the packing box, the bottom of the packing box is designed to be of a 20-degree self-sealing angle, and the combined type self-sealing packing and the packing box are fixed to the valve body platform through bolts and nuts. The valve rod penetrates through the packing, the packing box and the packing gland, and the bottom of the packing gland is designed to be a 20-degree self-sealing angle. The packing gland is fastened by the bolt and the nut, and the combined disc spring is additionally arranged between the nut and the gland, so that the nut is prevented from loosening due to stress. The stuffing box sealing structure not only has a good sealing effect, but also has the function of automatically adjusting the pre-tightening force, and when the nut is loosened, the disc spring can automatically compensate and adjust the pre-tightening force, so that the sealing performance of the stuffing part is ensured.

Description

Technical Field

[0001] The utility model relates to the field of ball valves, in particular to a ball valve with a high-performance packing sealing structure. Background Art

[0002] Ball valve is a valve whose ball is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control. The hard-sealed V-type ball valve has a strong shear force between its V-type ball core and the metal valve seat with hard alloy surfacing, which is particularly suitable for media containing fibers, tiny solid particles, etc. The multi-way ball valve can not only flexibly control the confluence, diversion and flow direction switching of the medium in the pipeline, but also close any channel to connect the other two channels.

[0003] Conventional stuffing box is prone to leakage and has no self-adjustment function. Once the pre-tightening force of the bolts and nuts is insufficient, leakage will occur.

[0004] In view of this, research and improvement are carried out on the existing problems, and a high-performance packing seal structure ball valve is provided, which has a reasonable structural design. This stuffing box sealing structure not only has a good sealing effect, but also has the function of automatically adjusting the preload force. When the nut is loose, the disc spring will automatically compensate and adjust the preload force to ensure the sealing performance of the packing part. The purpose is to solve the problem and improve the practical value through this technology. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a ball valve with a high-performance packing seal structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-performance packing sealing structure ball valve, including a valve body platform and a stuffing box, a stuffing box is arranged at the upper end of the valve body platform, a self-sealing packing is arranged on the inner wall of the stuffing box, bolts S and nuts S are installed inside the stuffing box, a valve stem is connected through the self-sealing packing and the interior of the stuffing box, a packing gland is installed inside the stuffing box, bolts A and nuts A are arranged inside the packing gland, and a combined disc spring is installed between the bolts A and the packing gland.

[0007] As a further description of the above technical solution:

[0008] The bottom of the stuffing box is designed to have a self-sealing angle of 20°, and the size of the stuffing box is smaller than the size of the valve body platform.

[0009] As a further description of the above technical solution:

[0010] The stuffing box is fixedly mounted on the top of the valve body platform by means of bolts S and nuts S. The nuts S are threadedly connected to the outside of the bolts S, and the bolts S are inserted into the inside of the stuffing box.

[0011] As a further description of the above technical solution:

[0012] The valve stem is movably connected to the self-sealing packing and the inside of the stuffing box, the self-sealing packing is filled in the inner wall of the stuffing box, and the valve stem is connected to the valve body platform.

[0013] As a further description of the above technical solution:

[0014] The packing gland is fixedly connected to the top of the self-sealing packing, the packing gland is fastened by bolts A and nuts A, and the combined disc spring is fixedly installed between the bolts A and the packing gland.

[0015] The utility model has the following beneficial effects:

[0016] In the utility model, the bottom of the stuffing box is designed to have a 20° self-sealing angle, and the combined self-sealing stuffing is fixed to the valve body platform by bolts and nuts. The valve stem passes through the stuffing box and the stuffing gland, and the bottom of the stuffing gland is designed to have a 20° self-sealing angle. The stuffing gland is fastened with bolts and nuts, and a combined disc spring is added between the nut and the gland to prevent the nut from loosening due to force.

[0017] This stuffing box sealing structure not only has a good sealing effect, but also has the function of self-adjusting preload. When the nut is loose, the disc spring will automatically compensate and adjust the preload to ensure the sealing performance of the packing part.

[0018] The valve stem is movably connected to the self-sealing packing and the inside of the stuffing box, so that the valve stem can maintain stable sealing performance during rotation. The self-sealing packing is filled in the inner wall of the stuffing box, which can effectively prevent the medium from leaking through the gap between the stuffing box and the valve stem.

[0019] The packing gland is fixedly connected to the top of the self-sealing packing and fastened by bolt A and nut A, so that the packing gland can be tightly pressed on the top of the self-sealing packing, further enhancing the sealing effect. The combined disc spring is fixedly installed between the bolt A and the packing gland, which can effectively absorb the deformation of the packing gland caused by the medium pressure and temperature changes and maintain the stability of the packing gland. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a high-performance packing seal structure ball valve proposed by the utility model;

[0021] Figure 2 This is an enlarged view of a stuffing box of a ball valve with a high-performance stuffing seal structure proposed by the utility model.

[0022] Legend:

[0023] 1. Self-sealing packing; 2. Stuffing box; 3. Valve stem; 4. Bolt A; 5. Combined disc spring; 6. Nut A; 7. Bolt S; 8. Nut S; 9. Valve body platform; 10. Packing gland. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model; the terms "first", "second" and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Reference Figure 1-2 The utility model provides an embodiment: a high-performance packing sealing structure ball valve, including a valve body platform 9 and a stuffing box 2, the upper end of the valve body platform 9 is provided with a stuffing box 2, the inner wall of the stuffing box 2 is provided with a self-sealing packing 1, the interior of the stuffing box 2 is installed with bolts S7 and nuts S8, the self-sealing packing 1 and the interior of the stuffing box 2 are penetrated and connected with a valve stem 3, the interior of the stuffing box 2 is installed with a packing gland 10, the interior of the packing gland 10 is provided with bolts A4 and nuts A6, and a combined disc spring 5 is installed between the bolts A4 and the packing gland 10.

[0027] In the utility model, the bottom of the stuffing box 2 is designed to have a 20° self-sealing angle, and the size of the stuffing box 2 is smaller than the size of the valve body platform 9. By designing a 20° self-sealing angle at the bottom of the stuffing box, the sealing performance of the stuffing box is enhanced, the leakage of the medium is effectively prevented, and the sealing effect of the ball valve is improved. At the same time, the size of the stuffing box is smaller than the size of the valve body platform, which makes installation more convenient and improves work efficiency.

[0028] Further, the stuffing box 2 is fixedly mounted on the top of the valve body platform 9 by means of bolts S7 and nuts S8, the nuts S8 are threadedly connected to the outside of the bolts S7, the bolts S7 are inserted into the inside of the stuffing box 2, and the stuffing box is fixedly mounted on the top of the valve body platform by means of bolts S and nuts S. This installation method makes the connection between the stuffing box and the valve body platform more firm and reliable, and not easy to loosen. The nuts S are threadedly connected to the outside of the bolts S, making disassembly and installation more convenient and quick.

[0029] Furthermore, the valve stem 3 is movably connected to the inside of the self-sealing packing 1 and the stuffing box 2, the self-sealing packing 1 is filled in the inner wall of the stuffing box 2, the valve stem 3 is connected to the valve body platform 9, and the valve stem is movably connected to the inside of the self-sealing packing and the stuffing box, so that the valve stem can maintain stable sealing performance during rotation. The self-sealing packing is filled in the inner wall of the stuffing box, which can effectively prevent the medium from leaking through the gap between the stuffing box and the valve stem.

[0030] Furthermore, the packing gland 10 is fixedly connected to the top of the self-sealing packing 1, and the packing gland 10 is fastened by bolts A4 and nuts A6. The combined disc spring 5 is fixedly installed between the bolts A4 and the packing gland 10. The packing gland is fixedly connected to the top of the self-sealing packing and fastened by bolts A and nuts A, so that the packing gland can be tightly pressed on the top of the self-sealing packing, further enhancing the sealing effect.

[0031] Working principle and usage process:

[0032] The bottom of the stuffing box is designed to have a 20° self-sealing angle, and the combined self-sealing stuffing is fixed to the valve body platform by bolts and nuts. The valve stem passes through the stuffing box and stuffing gland, and the bottom of the stuffing gland is designed to have a 20° self-sealing angle. The stuffing gland is fastened with bolts and nuts, and a combined disc spring is added between the nut and the gland to prevent the nut from loosening due to force.

[0033] This stuffing box sealing structure not only has a good sealing effect, but also has the function of self-adjusting preload. When the nut is loose, the disc spring will automatically compensate and adjust the preload to ensure the sealing performance of the packing part. The valve stem 3 passes through the self-sealing packing 1 and the inside of the stuffing box 2 and is connected to the valve body platform 9. During the rotation process, the valve stem 3 can maintain stable sealing performance due to the filling and sealing effect of the self-sealing packing 1, effectively preventing medium leakage.

[0034] In order to further enhance the sealing effect, the packing gland 10 is placed on the top of the self-sealing packing 1 and fastened by bolts A4 and nuts A6. A combined disc spring 5 is installed between the bolts A4 and the packing gland 10. Through the elastic effect of the combined disc spring 5, the packing gland 10 can be tightly pressed on the top of the self-sealing packing 1, thereby improving the sealing performance.

[0035] When the ball valve is in working state, the medium flows through the valve body platform 9 and the valve stem 3. Since the bottom of the stuffing box 2 is designed to be a 20° self-sealing angle, and the stuffing box 2 is firmly connected to the valve body platform 9, it can effectively prevent the medium from leaking from the bottom of the stuffing box 2. At the same time, the close fit between the self-sealing packing 1 and the packing gland 10 can also effectively prevent the medium from leaking from the gap between the stuffing box 2 and the valve stem 3.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-performance packing seal structure ball valve, comprising a valve body platform (9) and a packing box (2), Features: A stuffing box (2) is provided at the upper end of the valve body platform (9), a self-sealing stuffing box (1) is provided on the inner wall of the stuffing box (2), bolts S (7) and nuts S (8) are installed inside the stuffing box (2), a valve stem (3) is connected through the self-sealing stuffing box (1) and the inside of the stuffing box (2), a stuffing gland (10) is installed inside the stuffing box (2), bolts A (4) and nuts A (6) are provided inside the stuffing gland (10), and a combined disc spring (5) is installed between the bolts A (4) and the stuffing gland (10).

2. A high performance packing seal structure ball valve according to claim 1, Features: The bottom of the stuffing box (2) is designed to have a self-sealing angle of 20°, and the size of the stuffing box (2) is smaller than the size of the valve body platform (9).

3. A high performance packing seal structure ball valve according to claim 1, Features: The stuffing box (2) is fixedly mounted on the top of the valve body platform (9) by means of bolts S (7) and nuts S (8), wherein the nuts S (8) are threadedly connected to the outside of the bolts S (7), and the bolts S (7) are inserted into the inside of the stuffing box (2).

4. A high performance packing seal structure ball valve according to claim 1, Features: The valve stem (3) is movably connected to the inside of the self-sealing packing (1) and the stuffing box (2); the self-sealing packing (1) is filled in the inner wall of the stuffing box (2); and the valve stem (3) is connected to the valve body platform (9).

5. A high performance packing seal structure ball valve according to claim 1, Features: The packing gland (10) is fixedly connected to the top of the self-sealing packing (1), the packing gland (10) is fastened by bolts A (4) and nuts A (6), and the combined disc spring (5) is fixedly installed between the bolts A (4) and the packing gland (10).

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