High-temperature-resistant ball valve capable of rapidly dissipating heat

Abstract

The high-temperature-resistant ball valve comprises a valve body, a valve seat, a ball body and a valve rod, the upper portion and the lower portion of the ball body are connected with an upper fixing shaft and a lower fixing shaft respectively, a plurality of heat dissipation holes are formed in the ball body, and a plurality of heat dissipation grooves are formed in the valve body and matched with high-temperature graphite packing for heat dissipation. The high-temperature ball valve can quickly finish cooling operation after being heated in the working process, the possibility that a medium leaks from a valve rod filler due to deformation of a ball valve filler assembly at the ultra-high temperature is greatly reduced, and the probability that a ball body and a valve seat of the ball valve are heated, expanded and locked at the ultra-high temperature is reduced; in addition, the ball valve can solve the problem of material accumulation by means of thrust of a fluid medium in a pipeline, and a regular cross-linked structure is formed between the heat dissipation assembly on the ball valve and the sealing structure, so that the ball valve can achieve a better sealing effect when used under the ultrahigh-temperature harsh working condition, the pain point of a user is solved, and the service cycle is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves for special working conditions, in particular to a high-temperature resistant ball valve capable of rapidly dissipating heat. Background Art

[0002] A ball valve, a valve in which the opening and closing part (ball) is driven by a valve stem and rotates around the axis of the ball valve, can also be used for the regulation and control of fluids; the applicant has long been engaged in the research and improvement of valve technology under special working conditions, such as in the production of aviation sponge titanium, which requires the installation of high-temperature resistant, wear-resistant, corrosion-resistant and erosion-resistant ball valves on electric furnace smelting and high-titanium slag tank cross-pipes. In response to such ultra-high temperature working conditions, the applicant has developed an ultra-high temperature resistant, wear-resistant, corrosion-resistant and erosion-resistant ball valve with good heat dissipation performance and good sealing performance at high temperatures, which can be used for high-titanium slag tank cross-pipes in aviation sponge titanium production. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and provide a high temperature resistant ball valve that can quickly dissipate heat. The technical solution adopted by the utility model is as follows:

[0004] A high-temperature resistant ball valve capable of rapidly dissipating heat, the ball valve comprising a valve body, a valve seat, a ball, and a valve stem; an upper fixed shaft and a lower fixed shaft are connected to the top and bottom of the ball respectively; a first heat dissipation hole is provided on the ball near the upper and lower fixed shafts to reduce deformation of the ball shaft at high temperatures; a second heat dissipation hole is provided on the spherical surface of the ball to reduce deformation of the spherical surface at high temperatures; the heat dissipation holes and grooves mentioned above and below do not penetrate the components themselves to ensure the sealing performance of the valve.

[0005] Furthermore, the side of the valve seat close to the sphere is a valve seat sealing surface, and the valve seat sealing surface has a groove so that its cross-section is W-shaped. Under the state of high-temperature expansion, the valve seat sealing surface will not cause leakage due to high-temperature deformation due to the insulation groove, and still has a good sealing effect at high temperature.

[0006] Furthermore, the valve seat includes a valve seat support ring, and a third heat dissipation hole is provided on the inner circumferential wall of the valve seat support ring; the "inner circumferential wall" refers to an inner wall close to the sphere, and the third heat dissipation hole prevents the valve seat support ring from locking due to thermal expansion and contraction deformation under high temperature conditions.

[0007] Preferably, a fourth heat dissipation hole is arranged around one end of the valve stem close to the ball, so that the ball will not get stuck due to the high temperature when it is opened and closed during high-temperature operation.

[0008] Furthermore, a stuffing box cooperating with the valve stem is provided on the valve body, and a stuffing box accommodating a stuffing combination is provided between the stuffing box and the valve stem. The stuffing combination includes a stuffing pressure ring, a spring, and a high-temperature graphite stuffing arranged from top to bottom, and the stuffing combination is pre-tightened to automatically compensate for the seal at high temperature to achieve a high-temperature sealing effect.

[0009] Preferably, a first heat dissipation groove is provided between the lower fixed shaft and the valve body to avoid deformation of the fixed shaft at high temperature and thus causing sealing leakage; a second heat dissipation groove is provided at the contact position between the valve body and the stuffing box to greatly reduce the risk of locking at high temperature, and the first heat dissipation groove and the second heat dissipation groove are filled with graphite cooling filler.

[0010] Preferably, the valve stem is extended, and the extended length is designed according to the temperature of the actual working conditions. The extended valve stem is designed with a heat dissipation function, which can reduce the temperature to a standard that the packing combination can withstand, and a third heat dissipation groove is arranged on the inner wall of the packing box below the packing combination. The third heat dissipation groove serves as a cooling slot, so that heat is dissipated during conduction, thereby greatly reducing the temperature of the packing; the packing box is connected to a heat sink, and the heat sink extends outward from the packing box and dissipates heat, thereby further reducing the temperature of the packing part.

[0011] Preferably, a fourth heat dissipation groove is arranged on the outer peripheral wall of the lower end of the stuffing box, and a high-temperature graphite rope is arranged in the fourth heat dissipation groove to reduce the influence of high temperature on the upper fixed shaft.

[0012] Preferably, the valve stem serves as the upper fixed axis of the sphere, and the upper fixed axis and / or the lower fixed axis are connected to the sphere through a tapered plum blossom-shaped connecting surface and a tapered meshing surface, and will not loosen due to thermal expansion and contraction. The plum blossom taper fit is a coupling method that can be understood by those skilled in the art and will not be elaborated here.

[0013] Preferably, octagonal sealing rings may be selectively provided at the connection between the valve body and the pipeline, at the connection between components combined to form the valve body, at the connection between the valve body and the stuffing box or the valve cover, at the connection between the internal components of the valve body and the valve body, and at the connection between the internal components of the valve body, so that there will be no leakage due to thermal expansion between the various structures at high temperatures. The octagonal sealing ring is an existing sealing product and its specific structure is not described here.

[0014] The above design scheme can complete the cooling operation of the high-temperature ball valve after it is heated during operation, greatly reducing the possibility of deformation of the ball valve packing assembly at ultra-high temperature causing leakage of the medium from the valve stem packing, and reducing the probability of the ball and valve seat of the ball valve expanding and locking due to heat at ultra-high temperature; the ball valve can use the thrust of the fluid medium in the pipeline to solve the problem of material accumulation, and a regular cross-linking structure is formed between the heat dissipation assembly and the sealing structure in the technical scheme, so that the ball valve can achieve better sealing effect, solve the user's pain points, and extend the service life when used in ultra-high temperature and harsh working conditions.

[0015] The beneficial effects of the utility model are as follows: the technical scheme provides a first heat dissipation hole on the periphery of the ball of the ball valve near the upper and lower fixed shafts and a second heat dissipation hole on the spherical surface, so that the ball has good heat dissipation performance, thereby reducing the deformation of the ball and the fixed shaft at high temperatures, so that it has better performance under high temperature conditions; further, heat dissipation grooves are provided on the valve seat and the valve stem to achieve rapid heat dissipation during heat conduction between valve components, thereby reducing the impact of high temperature conduction on other valve components, and ensuring the performance and sealing performance of the valve at high temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0017] Figure 1 This is a schematic diagram of the appearance of Example 1;

[0018] Figure 2 This is a schematic diagram of the overall structure of Example 1;

[0019] Figure 3 It is a plane projection diagram of the matching surface between the upper fixed shaft or the lower fixed shaft and the sphere in Example 1;

[0020] Figure 4 This is a side view of the ball and valve body of Example 1;

[0021] Figure 5 This is a schematic cross-sectional view of the valve seat sealing surface of Example 1;

[0022] Figure 6 This is a schematic diagram of the position of the third heat dissipation hole on the valve seat support ring of Example 1;

[0023] Figure 7 This is a schematic diagram of the position of the fourth heat dissipation hole on the lower end of the valve stem in Example 1;

[0024] In the figure, 1-valve body, 101-first heat dissipation groove, 102-second heat dissipation groove, 2-sphere, 201-first heat dissipation hole, 202-second heat dissipation hole, 21-upper fixed shaft, 22-lower fixed shaft, 3-valve stem, 304-fourth heat dissipation hole, 4-valve seat sealing surface, 6-sliding sleeve, 7-thrust pad, 8-third heat dissipation groove, 9-heat sink, 12-octagonal sealing ring, 13-high temperature graphite rope, 14-valve seat pressure ring, 15-valve seat pad, 16-valve seat support ring, 163-third heat dissipation hole, 17-high temperature graphite rope, 18-spring, 19-high temperature graphite sealing ring, 20-sealing pad, 21-upper fixed shaft, 22-lower fixed shaft, 25-sealing ring, 26-thrust pad, 29-stuffing box, 294-fourth heat dissipation groove, 33-high temperature graphite packing, 34-spring, 35-packing pressure ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0026] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0027] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 1-Figure 4 As shown, a high-temperature resistant ball valve capable of rapid heat dissipation comprises a valve body 1, a valve seat, a ball 2, and a valve stem 3. The upper and lower parts of the ball 2 are respectively connected to an upper fixed shaft 21 and a lower fixed shaft 22. The ball 2 is provided with a first heat dissipation hole 201 near the upper and lower fixed shafts to reduce the deformation of the ball shaft at high temperatures; a second heat dissipation hole 202 is provided on the spherical surface of the ball 2 to reduce the deformation of the spherical surface at high temperatures to ensure the sealing performance of the valve.

[0030] like Figure 5 As shown, the side of the valve seat close to the ball 2 is a valve seat sealing surface 4, and the valve seat sealing surface 4 has a groove so that its cross-section is W-shaped. Under the state of high-temperature expansion, the valve seat sealing surface will not be deformed due to the high temperature due to the insulation groove, and still has a good sealing effect at high temperature.

[0031] like Figure 6 As shown, the valve seat includes a valve seat support ring 16, and a third heat dissipation hole 163 is provided on the inner peripheral wall of the valve seat support ring 16; the third heat dissipation hole 163 prevents the valve seat support ring 16 from locking due to thermal expansion and contraction deformation under high temperature conditions.

[0032] like Figure 7 As shown, a fourth heat dissipation hole 304 is arranged around one end of the valve stem 3 close to the ball 2, so that the valve stem 3 will not be locked due to the high temperature when opening and closing during high-temperature operation.

[0033] Further references Figure 2 A stuffing box 29 matched with the valve stem 3 is arranged on the valve body 1, and a stuffing box containing a stuffing combination is arranged between the stuffing box 29 and the valve stem 3. The stuffing combination includes a stuffing pressure ring 35, a spring 34, and a high-temperature graphite stuffing 33 arranged from top to bottom, and the stuffing combination is pre-tightened to automatically compensate the seal at high temperature to achieve a high-temperature sealing effect.

[0034] A first heat dissipation groove 101 is arranged between the lower fixed shaft 22 and the valve body 1 to avoid deformation of the fixed shaft at high temperature and cause sealing leakage; a second heat dissipation groove 102 is arranged at the contact position between the valve body 1 and the stuffing box 29 to greatly reduce the risk of locking at high temperature, and the first heat dissipation groove 101 and the second heat dissipation groove 102 are filled with graphite cooling filler.

[0035] The valve stem 3 is lengthened, and a third heat dissipation groove 8 is provided on the inner wall of the stuffing box 29 below the stuffing combination. The third heat dissipation groove 8 is an empty groove, so that heat is dissipated during conduction, thereby greatly reducing the temperature at the stuffing; the stuffing box 29 is connected to the heat sink 9, and the heat sink 8 extends outward from the stuffing box 29 and dissipates heat, thereby further reducing the temperature of the stuffing part.

[0036] A fourth heat dissipation groove 294 is arranged on the outer peripheral wall of the lower end of the stuffing box 29. A high-temperature graphite rope can be arranged in the fourth heat dissipation groove 294 to reduce the influence of high temperature on the upper fixed shaft.

[0037] The valve stem 3 serves as the upper fixed axis of the sphere. The upper fixed axis and / or the lower fixed axis are connected and matched with the sphere 2 through a tapered plum blossom-shaped connecting surface and a tapered meshing surface, and will not loosen due to thermal expansion and contraction.

[0038] Octagonal sealing rings 12 are provided at the connection between the valve body 1 and the pipeline, at the connection between the components combined to form the valve body, at the connection between the valve body and the stuffing box 29 or the valve cover, at the connection between the internal components of the valve body and the valve body 1, and at the connection between the internal components of the valve body, so that there will be no leakage between the structures due to thermal expansion at high temperature.

[0039] Furthermore, a sliding sleeve 6 and a thrust pad 7 are provided at the connection between the upper and lower fixed shafts and the ball, and a high-temperature graphite rope 17 and a high-temperature graphite sealing ring 19 are provided at the connection between the valve seat support ring 16 and the valve body, at the connection between the upper and lower fixed shafts and the valve body, or at the connection between other components, so as to improve the heat dissipation performance and ensure the sealing performance.

[0040] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A high temperature resistant ball valve capable of rapid heat dissipation, the ball valve comprising a valve body (1), a valve seat, a ball (2), and a valve stem (3), wherein the upper and lower parts of the ball (2) are respectively connected to an upper fixed shaft (21) and a lower fixed shaft (22), wherein: The sphere (2) is provided with a first heat dissipation hole (201) near the upper and lower fixed axes, and a second heat dissipation hole (202) is provided on the spherical surface of the sphere (2).

2. A high temperature resistant ball valve capable of rapid heat dissipation according to claim 1, characterized in that: The side of the valve seat close to the sphere (2) is a valve seat sealing surface (4), and the valve seat sealing surface (4) has grooves so that its cross section is W-shaped.

3. A high temperature resistant ball valve capable of rapid heat dissipation according to claim 1, characterized in that: The valve seat comprises a valve seat support ring (16), and a third heat dissipation hole (163) is provided on the inner peripheral wall of the valve seat support ring (16).

4. A high temperature resistant ball valve capable of rapid heat dissipation according to claim 1, characterized in that: A fourth heat dissipation hole (304) is arranged around one end of the valve stem (3) close to the spherical body (2).

5. The high temperature resistant ball valve capable of rapid heat dissipation according to claim 1, characterized in that: A stuffing box (29) matched with the valve stem (3) is arranged on the valve body (1), and a stuffing box containing a stuffing combination is arranged between the stuffing box (29) and the valve stem (3). The stuffing combination includes a stuffing pressure ring (35), a spring (34), and a high-temperature graphite stuffing (33) arranged from top to bottom, and the stuffing combination is pre-tightened.

6. A high temperature resistant ball valve capable of rapid heat dissipation according to claim 1, characterized in that: A first heat dissipation groove (101) is provided between the lower fixed shaft (22) and the valve body (1), a second heat dissipation groove (102) is provided at a contact position between the valve body (1) and the stuffing box (29), and graphite cooling fillers are filled in the first heat dissipation groove (101) and the second heat dissipation groove (102).

7. The high temperature resistant ball valve capable of rapid heat dissipation according to claim 5, characterized in that: The valve stem (3) is lengthened so that a third heat dissipation groove (8) is provided on the inner wall of the stuffing box (29) below the stuffing assembly. The stuffing box (29) is connected to a heat sink (9), and the heat sink (9) extends outward from the stuffing box (29) to dissipate heat.

8. The high temperature resistant ball valve capable of rapid heat dissipation according to claim 5, characterized in that: A fourth heat dissipation groove (294) is provided on the outer peripheral wall of the lower end portion of the stuffing box (29).

9. The high temperature resistant ball valve capable of rapid heat dissipation according to claim 1, characterized in that: The valve stem (3) serves as an upper fixed shaft of the sphere, and the upper fixed shaft and / or the lower fixed shaft are connected and matched with the sphere (2) via a tapered plum blossom-shaped connecting surface and a tapered meshing surface.

10. The high temperature resistant ball valve capable of rapid heat dissipation according to claim 1, characterized in that: An octagonal sealing ring (12) is provided at least one of the connection between the valve body (1) and the pipeline, the connection between components combined to form the valve body, the connection between the valve body and the stuffing box (29) or the valve cover, the connection between the internal components of the valve body and the valve body (1), and the connection between the internal components of the valve body.

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