Elastomer bushing sealed high temperature resistant valve

Abstract

The present application relates to the technical field of valve, particularly relates to a kind of elastic spacer sleeve sealing high temperature resistant valve, including valve cover, with closed inner cavity;Valve stem, pass through the inner cavity, including heat dissipation section, drive section and be located between heat insulation section, the drive section one end extends the inner cavity and valve body in valve core connection, the heat dissipation section one end extends the inner cavity and contact with the outside world;Elastic spacer sleeve, except the drive section, is sleeved in the valve stem region, one end is sealed in the valve cover, the other end is sealed in the valve stem, the inner cavity is isolated into two parts, and elastic expansion occurs following the up and down movement of the valve stem;The present application solves the existing bellows valve opening small, easy failure problem, provides heat insulation and heat dissipation valve stem, meets the working requirement of valve under high temperature working condition.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a high-temperature resistant valve with an elastic spacer seal. Background Technology

[0002] As a component for controlling fluid media, the sealing performance of valves is very important. In special occasions involving flammable, explosive, toxic, or hazardous substances, the sealing performance, especially the external sealing performance of valves, is particularly crucial.

[0003] The existing valves with good external sealing performance are bellows-sealed valves. However, existing bellows have many problems. First, the axial tensile and compressive distance of existing bellows is short, which limits the valve opening. Moreover, they are prone to excessive stress and failure during the tensile and compressive process. Second, the bellows wall is thin, which makes it unstable when subjected to pressure deformation. It cannot recover its performance through its own elasticity and cannot withstand large working pressure. Furthermore, the bellows are difficult to process and have high material costs, resulting in high bellows prices.

[0004] Especially under high-temperature media conditions, high temperatures can cause the sealing components at the valve stem or the bellows made of heat-sensitive materials to fail. High temperatures can also be transmitted to the drive handwheel or other drive devices, affecting the valve's actuation function. To mitigate the impact of high temperatures, current methods include increasing the axial length of the valve or adding heat sinks to the valve body. However, these methods are not only inefficient in terms of heat dissipation but also increase the valve's size, making manufacturing more difficult and increasing production costs. Summary of the Invention

[0005] The purpose of this invention is to provide a high-temperature resistant valve with an elastic diaphragm seal, thereby solving the aforementioned problems of existing bellows-type sealing valves. To achieve the above objective, this invention provides the following technical solution:

[0006] This invention provides a high-temperature resistant valve with an elastic spacer seal, comprising:

[0007] The valve cover has a closed inner cavity;

[0008] The valve stem passes through the inner cavity and includes a heat dissipation section, a drive section, and a heat insulation section between the two. One end of the drive section extends out of the inner cavity and is connected to the valve core inside the valve body. One end of the heat dissipation section extends out of the inner cavity and contacts the outside.

[0009] An elastic spacer is fitted over the valve stem except for the drive section. One end is fixed to the valve cover and the other end is fixed to the valve stem, separating the inner cavity into two parts. It elastically expands and contracts as the valve stem moves up and down.

[0010] As a further technical solution, the valve cover includes a side valve cover and an upper valve cover disposed on top of it, and the elastic spacer is fixedly sealed to one end of the valve cover by the cooperation of the side valve cover and the upper valve cover.

[0011] As a further technical solution, the heat insulation section is detachably connected to the heat dissipation section and the driving section.

[0012] As a further technical solution, the elastic spacer is fixedly sealed at one end of the valve stem at the junction of the heat dissipation section and the heat insulation section.

[0013] As a further technical solution, the elastic spacer is attached to the valve stem, and a lubricant is provided between the elastic spacer and the valve stem.

[0014] As a further technical solution, the heat dissipation section is embedded with a heat pipe structure.

[0015] As a further technical solution, a first sealing and heat insulation pad is provided between the drive section and the valve cover.

[0016] As a further technical solution, a second sealing and heat insulation pad is provided between the valve cover and the valve body.

[0017] As a further technical solution, a sealing gasket is provided between the heat dissipation section and the valve cover.

[0018] As a further technical solution, the heat insulation section is made of heat insulation material.

[0019] The beneficial effects of the present invention are as follows:

[0020] (1) The valve stem of the present invention is provided with multiple functional sections, wherein the driving section is used to drive the valve core to move and realize the normal opening and closing of the valve, the heat insulation section can limit the heat transfer to the upper end through the valve stem, and the heat dissipation section is provided with a heat dissipation structure to quickly dissipate the heat to the outside of the valve. Through the cooperation of the heat insulation section and the heat dissipation section, the influence of heat on the elastic spacer and the valve stem driving mechanism is reduced, and the working requirements of the valve under high temperature conditions are met.

[0021] (2) The elastic spacer, heat dissipation section, and valve cover of this invention together form a continuous sealing cavity to ensure the sealing performance of the valve. The elastic spacer stretches and compresses according to the up and down movement of the valve stem through its own elasticity, meeting the opening and closing requirements of the valve. Therefore, the use of an elastic spacer can solve the sealing problem at the valve stem and ensure the sealing performance of the valve. The elastic spacer can be set with different shapes and lengths as needed, and has a greater axial extension length than the existing bellows, increasing the valve opening and having a higher fatigue life.

[0022] (3) After the elastic sleeve of the present invention is deformed by pressure, if the pressure decreases, it can restore its function through its own elasticity, and will not have the phenomenon of instability and inability to restore function after deformation of existing bellows.

[0023] (4) The elastic spacer of the present invention is attached to the valve stem. When there is a pressurized fluid medium inside the valve cover cavity, the medium pressure causes the elastic spacer to deform. Since the elastic spacer and the valve stem are attached, the valve stem provides support for the elastic spacer, preventing the elastic spacer from deforming too much and failing, and it can withstand a large working pressure. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute a limitation thereof. It should also be understood that these drawings are for simplicity and clarity and are not necessarily drawn to scale. The invention will now be described and explained with additional features and details using the drawings, wherein:

[0025] Figure 1 A cross-sectional schematic diagram of the valve structure in an embodiment of the present invention is shown.

[0026] In the diagram: 1. Heat dissipation section; 2. Heat pipe structure; 3. Elastic spacer; 4. Heat insulation section; 5. First sealing heat insulation pad; 6. Valve body; 7. Valve seat; 8. Valve core; 9. Connection structure; 10. Second sealing heat insulation pad; 11. Drive section; 12. Side valve cover; 13. Upper valve cover; 14. Sealing gasket. Detailed Implementation

[0027] The technical solutions in typical embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, this embodiment provides a high-temperature resistant valve with an elastic spacer seal, including a valve cover, valve stem, elastic spacer 3, valve body 6, valve seat 7, valve core 8, and other structures.

[0029] The valve cover has a closed inner cavity, which is referred to as the valve cover cavity in this embodiment. The valve cover includes a side valve cover 12 and an upper valve cover 13 located on top of it. The side valve cover 12 is cylindrical, open at the top, and has a partition with through holes at the bottom that separates it from the valve body cavity. The upper valve cover 13 is shaped to match the side valve cover 12 and also has through holes. During assembly, the upper valve cover 13 is inverted and placed on top of the side valve cover 12, with a sealing structure between them to form a closed inner cavity. It should be noted that the through holes reserved at the top and bottom of the valve cover are for assembling the valve stem, and the valve stem, after assembly, forms a closed inner cavity.

[0030] The valve stem passes through the valve cover cavity and includes a heat dissipation section 1, a drive section 11, and a heat insulation section 4 located between them. From bottom to top, the drive section 11, heat insulation section 4, and heat dissipation section 1 are arranged in sequence. One end of the drive section 11 extends out of the valve cover cavity and connects to the valve core 8 inside the valve body 6. One end of the heat dissipation section 1 extends out of the valve cover cavity and contacts the outside. The heat dissipation section 1, heat insulation section 4, and drive section 11 work together to complete the function of the valve stem and realize the opening and closing of the valve. The drive section 11 is made of ordinary heat-resistant material and controls the valve core 8 to open and close the valve through the connecting structure 9. The heat insulation section 4 is made of heat insulation material to limit the heat transfer through the valve stem. A heat pipe structure 2 is set on the heat dissipation section 1 and embedded in the heat dissipation section 1 to increase the heat dissipation of the valve stem.

[0031] When one end of the heat pipe is heated, the liquid in the capillary wick evaporates and vaporizes. The vapor flows to the other end under a small pressure difference, releasing heat and condensing back into liquid. The liquid then flows back to the evaporation section along the porous material due to capillary force (or gravity). This cycle continues, transferring heat from one end to the other, thus achieving heat dissipation from the valve stem.

[0032] The valve stem is equipped with multiple functional sections. The drive section 11 is used to drive the valve core 8 to move and realize the normal opening and closing of the valve. The heat insulation section 4 can limit the heat transfer to the upper end through the valve stem. The heat dissipation section 1 is equipped with a heat dissipation structure to quickly dissipate heat to the outside of the valve, reducing the impact of heat on the elastic spacer 3 and the valve stem drive mechanism, and avoiding the need to use methods such as lengthening the axial length of the valve or adding heat sinks to the valve body for heat dissipation.

[0033] The heat insulation section 4 is detachably connected to the heat dissipation section 1 and the drive section 11. In this embodiment, the heat insulation section 4 is detachably connected to the heat dissipation section 1 and the drive section 11 via a threaded connection. Of course, it is understood that in other embodiments, welding, fusion, or other detachable connection methods may also be used.

[0034] The elastic spacer 3 is fitted on the valve stem except for the drive section 11. One end is fixed to the valve cover and the other end is fixed to the valve stem, isolating the valve cover cavity into two parts, which elastically expand and contract with the up and down movement of the valve stem.

[0035] The elastic spacer 3, the heat dissipation section 1, and the valve cover together form a continuous sealing cavity to ensure the sealing performance of the valve. The elastic spacer 3 stretches and compresses according to the up and down movement of the valve stem through its own elasticity to meet the opening and closing requirements of the valve.

[0036] Therefore, the sealing method using the elastic spacer 3 solves many problems associated with existing bellows. The elastic spacer 3 solves the sealing problem at the valve stem, ensuring the valve's sealing performance. The elastic spacer 3 can be configured with different shapes and lengths as needed, providing a greater axial extension length than existing bellows, increasing the valve opening and resulting in a longer fatigue life. Furthermore, the elastic spacer 3 has the advantages of simple processing and low cost.

[0037] After the elastic spacer 3 is deformed under pressure, if the pressure decreases, it can restore its function through its own elasticity, and will not exhibit the phenomenon of instability and inability to restore function that occurs after deformation of existing bellows.

[0038] The elastic spacer 3 can be cylindrical, corrugated, or other shapes. Its elasticity must meet the requirement of its expansion and contraction function as it moves up and down with the valve stem. The material can be silicone, rubber, or other elastic materials, which can be selected according to different working conditions. Understandably, in high-temperature conditions, high-temperature resistant materials should be selected.

[0039] In this embodiment, the elastic spacer 3 is cylindrical, with an outer edge extending outward at the top and an inner edge extending inward at the bottom. The top outer edge is fixed (fixed and sealed) to one end of the valve cover, and is pressed and sealed by the cooperation of the side valve cover 12 and the upper valve cover 13. The bottom inner edge is fixed to one end of the valve stem, and is fixed at the cooperation point between the heat dissipation section 1 and the heat insulation section 4. The heat of the drive section 11 is restricted from being transferred by the heat insulation section 4, preventing the heat of the drive section 11 from being transferred to the elastic spacer 3.

[0040] In the initial state, the valve is in the open position, and the elastic spacer 3 is attached to the valve stem. When there is pressurized fluid medium inside the valve cover cavity, the medium pressure causes the elastic spacer to deform. Because the elastic spacer and the valve stem are attached, the valve stem provides support for the elastic spacer, preventing the elastic spacer from deforming too much and failing, and enabling it to withstand greater working pressure.

[0041] When the valve is closed, the elastic spacer is stretched, creating a gap between the elastic spacer and the valve stem. Since the valve is closed, the pressure inside the valve cover cavity will also decrease. Even if the medium pressure in the valve cover cavity is still relatively high, the elastic spacer 3 will still re-fit onto the valve stem, thus providing support.

[0042] In addition, during the stretching process of the elastic spacer, a gap gradually forms between the elastic spacer and the valve stem, which avoids friction between the valve stem and the elastic spacer.

[0043] In some other embodiments, in the initial state, the elastic spacer 3 may not be attached to the valve stem, and a certain gap may be retained. The spacing is selected based on a comprehensive assessment of the actual working conditions and the elastic spacer material.

[0044] A lubricant, such as grease, oil, or other form of lubricant, is provided between the elastic spacer 3 and the valve stem.

[0045] A first sealing heat insulation pad 5 is provided at the mating point between the drive section 11 and the side valve cover 12 to limit the transfer of heat from the valve body cavity to the valve cover cavity, while sealing the fluid medium from entering the valve cover cavity and reducing the pressure of the fluid medium on the elastic spacer 3.

[0046] A second sealing heat insulation pad 10 is provided at the mating point between the bottom partition of the side valve cover 12 and the valve body 6 to limit the transfer of heat from the valve body to the valve cover.

[0047] A sealing gasket 14 is provided between the heat dissipation section 1 and the upper valve cover 13. The sealing gasket 14 provided between the upper valve cover 13 and the heat dissipation section 1 can perform the sealing function when the first heat insulation sealing gasket 5 and the elastic spacer 3 fail, thereby improving the sealing reliability of the valve.

[0048] The second sealing heat insulation pad 10 is set to restrict the heat transfer from the valve body to the valve cover, the first sealing heat insulation pad 5 is set to restrict the heat transfer from the valve body cavity to the valve cover cavity, the heat insulation section 4 is set to restrict the heat transfer through the valve stem, and the heat pipe structure is set on the valve stem to improve the heat dissipation efficiency. Under the combined effect, the heat transfer is restricted and the heat dissipation efficiency is improved.

[0049] The valve's sealing performance is ensured by employing a multi-layered sealing method. The triple seal—comprising the first thermal insulation gasket 5, the elastic spacer 3, and the sealing gasket 14—enhances the valve's sealing reliability.

[0050] The working principle of the valve in this embodiment is as follows:

[0051] During the valve's opening and closing process, the valve stem moves downwards, stretching the elastic spacer 3 and causing the valve core 8 to move downwards via the connecting structure 9. The valve core 8 then contacts the valve seat 7, closing the valve. During the valve's opening and closing process, the valve stem moves upwards, causing the elastic spacer 3 to rebound. The connecting structure 9 then causes the valve core 8 to move upwards, separating the valve seat 7 from the valve core 8, allowing the fluid medium to enter the valve body cavity. At this time, the first sealing heat insulation pad 5 prevents the fluid medium from entering the valve cover cavity, preventing the elastic spacer 3 from contacting the fluid medium. If a small amount of medium enters the valve cover cavity through the first sealing heat insulation pad 5, its pressure is much lower than the pressure in the valve body cavity, effectively reducing the pressure on the elastic spacer 3. When the elastic spacer 3 is deformed under significant pressure, the heat dissipation section 1 provides support, improving its pressure-bearing capacity. After the pressure decreases, the elastic spacer 3 returns to its shape and function. The sealing gasket 14, located between the upper valve cover 13 and the heat dissipation section 1, can perform a sealing function even if both the first heat insulation sealing gasket 5 and the elastic spacer 3 fail, improving the valve's sealing reliability. After the fluid medium enters the valve body cavity, the second heat insulation sealing gasket 10 restricts the heat from being transferred to the valve cover through the valve body 6, the first sealing heat insulation gasket 5 restricts the heat from entering the valve cover cavity from the valve body cavity, the heat insulation section 4 restricts the heat from being transferred through the valve stem, and the heat pipe structure 2 set on the heat dissipation section 1 increases heat dissipation. The combined effect of heat insulation and heat dissipation improves the high temperature resistance of the valve.

[0052] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A high-temperature resistant valve with an elastic spacer seal, characterized in that, include: The valve cover has a closed inner cavity; The valve stem passes through the inner cavity and includes a heat dissipation section, a drive section, and a heat insulation section between the two. One end of the drive section extends out of the inner cavity and is connected to the valve core inside the valve body. One end of the heat dissipation section extends out of the inner cavity and contacts the outside. An elastic spacer is fitted over the valve stem except for the drive section. One end is fixed to the valve cover and the other end is fixed to the valve stem, separating the inner cavity into two parts. It elastically expands and contracts as the valve stem moves up and down. The elastic spacer is attached to the valve stem. When there is a pressurized fluid medium inside the valve cover cavity, the medium pressure causes the elastic spacer to deform. Since the elastic spacer and the valve stem are attached, the valve stem provides support for the elastic spacer, preventing the elastic spacer from deforming too much and failing. The heat dissipation section is embedded with a heat pipe structure. When one end of the heat pipe is heated, the liquid in the capillary wick evaporates and vaporizes. The vapor flows to the other end under a small pressure difference, releases heat and condenses into liquid. The liquid then flows back to the evaporation section along the porous material by the action of capillary force or gravity. Heat is transferred from one end to the other, realizing heat dissipation of the valve stem. This avoids the need to increase the axial length of the valve or add heat sinks to the valve body for heat dissipation.

2. The high-temperature resistant valve with elastic spacer sealing as described in claim 1, characterized in that, The valve cover includes a side valve cover and an upper valve cover located on top of it. The elastic spacer is fixed to one end of the valve cover by the cooperation of the side valve cover and the upper valve cover.

3. The high-temperature resistant valve with elastic spacer sealing as described in claim 2, characterized in that, The heat insulation section is detachably connected to the heat dissipation section and the drive section.

4. The high-temperature resistant valve with elastic spacer sealing as described in claim 3, characterized in that, The elastic spacer is fixedly sealed at one end of the valve stem at the junction of the heat dissipation section and the heat insulation section.

5. A high-temperature resistant valve with an elastic spacer seal as described in claim 4, characterized in that, The elastic spacer is attached to the valve stem, and a lubricant is provided between the elastic spacer and the valve stem.

6. The high-temperature resistant valve with elastic spacer sealing as described in claim 1, characterized in that, A first sealing and heat-insulating gasket is provided between the drive section and the valve cover.

7. The high-temperature resistant valve with elastic spacer sealing as described in claim 1, characterized in that, A second sealing and heat-insulating gasket is provided between the valve cover and the valve body.

8. The high-temperature resistant valve with elastic spacer sealing as described in claim 1, characterized in that, A sealing gasket is provided between the heat dissipation section and the valve cover.

9. A high-temperature resistant valve with an elastic spacer seal as described in claim 1, characterized in that, The insulation section is made of heat-insulating material.

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