Self-operated regulating valve for high-temperature gas

Abstract

The invention discloses a self-operated regulating valve for high-temperature gas, and relates to the technical field of regulating valves, which is based on a conventional pressure regulating valve, because the pressure of the high-temperature gas fluctuates due to the influence of the temperature environment of the high-temperature gas, the structure of the conventional pressure regulating valve is improved, namely an action assembly is additionally arranged aiming at a valve core block; the action assembly is based on a corrugated air pressure pipe and an inner co-action rod, when a valve element block keeps moving vertically, an inner co-action block moves for the second time along with pressure change in a valve body, and in the pressure conversion process of the corrugated air pressure pipe and an air film sleeve, downward pressure is provided for a direction limiting block through an upper bearing plate, and the inner co-action rod moves for the second time; the invention aims to realize the adaptive movement of a valve core block through a secondary sliding process on the basis of not influencing the medium pressure, and free opening degree adjustment can be carried out on the basis of keeping the opening degree in the valve body in the process requirement.

Description

Technical Field

[0001] The invention relates to the technical field of regulating valves, and in particular to a self-operated regulating valve for high-temperature gas. Background Art

[0002] Pressure regulating valves are mainly used in regulating structures of media such as gas or liquid to directly change the pressure of the medium, and further improvements need to be made to the regulating valves based on the physical or chemical properties of the medium. Please refer to the relevant contents in publication numbers CN116677807A and CN118564703A.

[0003] Taking high-temperature gas (high-temperature steam) as an example, pressure adjustment is required according to relevant parameters. However, it should be noted that the pressure of high-temperature gas itself fluctuates, and the influence of high-temperature environment will further interfere with the pressure. For example, when the pressure of high-temperature gas is in a relatively constant state, combined with the ideal gas equation, it can be understood that the actual pressure of high-temperature gas increases due to temperature, which will further affect the pressure regulation process and increase the workload of the sealing structure in the valve stem.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a self-operated regulating valve for high-temperature gas, and is intended to explain a pressure regulating valve used for high-temperature gas. Because the high-temperature gas is affected by the high-temperature environment, its actual pressure is significantly higher than the high-temperature gas's own pressure. This process will directly affect the pressure regulation process and will also increase the workload of the sealing structure in the valve stem.

[0006] The object of the present invention can be achieved by the following technical scheme: A self-operated regulating valve for high-temperature gas, comprising a valve body, a valve core and an actuator, wherein the actuator is provided with an upper valve stem arranged downward, the valve core block is located inside the valve body and a lower valve stem is installed at the center point of the upper end, and an action component is provided between the upper valve stem and the lower valve stem; The action component includes a corrugated air pressure tube, an air film sleeve, and a direction limiting block. The upper end of the valve body is respectively installed with a fixed sleeve and a second-order sleeve corresponding to the corrugated air pressure tube and the air film sleeve from bottom to top. The lower valve stem passes through the valve body and the fixed sleeve upward, and the upper end of the lower valve stem is connected to the direction limiting block. A vertically arranged inner cooperating rod is slidably installed inside the lower valve stem, and the upper end of the inner cooperating rod is connected to the lower end of the corrugated air pressure tube.

[0007] It is further configured as follows: a pressure cone cap is installed on the lower end of the inner cooperation rod, the upper end of the corrugated air pressure tube is fixedly connected to the internal upper end of the fixed sleeve, and the lower end of the corrugated air pressure tube is slidably connected to the inner wall of the fixed sleeve.

[0008] It is further configured as follows: an inclined wedge block corresponding to the limiting block is installed at the lower end position inside the fixing sleeve, and the cross section of the limiting block is in a truncated cone shape.

[0009] It is further configured as follows: a connecting spring is installed at the lower end of the limiting block, and the lower end of the connecting spring is installed in the inner wall of the fixing sleeve.

[0010] It is further configured as follows: an upper pressure plate is slidably mounted inside the fixed sleeve at a middle position corresponding to the corrugated air pressure tube and the limiting block, and the upper pressure plate is slidably connected to the inner cooperating rod.

[0011] It is further configured as follows: the air film sleeve is arranged in the internal position of the second-order sleeve, and the air film sleeve is located in the middle position of the upper valve stem, the upper end position of the upper valve stem and the second-order sleeve are fixedly connected, and the lower end position of the upper valve stem and the upper end position of the fixed sleeve are slidingly connected, and the lower valve stem and the lower end position of the fixed sleeve are slidingly connected.

[0012] It is further configured as follows: the interior of the lower end portion of the upper valve stem is hollow, and the interior of the air film sleeve is communicated with the interior of the corrugated air pressure tube through the upper valve stem.

[0013] It is further configured as follows: the internal space of the fixed sleeve corresponding to the corrugated air pressure tube and the upper pressure plate is configured as a back-pressure chamber, a ventilation pipe is installed on the external position of the second-order sleeve and the fixed sleeve, and the interior of the air film sleeve is connected to the interior of the back-pressure chamber through the ventilation pipe.

[0014] The present invention has the following beneficial effects: 1. The present invention is based on a conventional pressure regulating valve. Aiming at the phenomenon that the pressure environment of high-temperature gas is in a fluctuating state due to the influence of the temperature environment, the structure of the conventional pressure regulating valve is improved. Specifically, the action component of the valve core block is composed of a corrugated air pressure tube, an inner cooperative rod and an air film sleeve. On the basis of the valve core block maintaining a normal opening through an actuator, the inner cooperative rod performs a secondary sliding process relative to the lower valve stem, and the pressure source of the inner cooperative rod in the sliding process comes from the medium pressure; In this process, the high-temperature gas inside the valve body will not directly act on the actuator and the action components, but the key is to directly act on the upper pressure plate in the pressure conversion process through the corrugated air pressure tube and the air film sleeve, and provide downward pressure on the limit block. Therefore, in the specific operation process, the valve core block maintains the basic opening, and under the influence of pressure fluctuations, multiple irregular secondary sliding processes occur, which are specifically used to change the opening of the valve core block and achieve the purpose of autonomously adjusting the medium discharge pressure. 2. Based on the above content, the overall structure is based on a conventional pressure regulating valve. In order to realize the above-mentioned secondary sliding process, it is specifically aimed at the connection method of the upper valve stem and the lower valve stem relative to the second-order sleeve and the fixed sleeve, wherein the lower valve stem cooperates with the inner cooperative rod to realize the above-mentioned secondary sliding and further adjust the opening of the valve core block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a structural schematic diagram of a self-operated regulating valve for high-temperature gas proposed by the present invention; Figure 2 A self-operated regulating valve for high temperature gas proposed by the present invention Figure 1 A cross-sectional view of Figure 3 A cross-sectional view of a valve body in a self-operated regulating valve for high-temperature gas proposed by the present invention; Figure 4 This is a cutaway and exploded view of an actuating component in a self-operated regulating valve for high-temperature gas proposed by the present invention; Figure 5 A self-operated regulating valve for high temperature gas proposed by the present invention Figure 4 Split diagram of ; Figure 6 A self-operated regulating valve for high temperature gas proposed by the present invention Figure 4 Cutaway view of the action assembly.

[0017] In the figure: 1. valve body; 2. fixed sleeve; 3. second-order sleeve; 4. actuator; 5. upper valve stem; 6. air film sleeve; 7. corrugated air pressure tube; 8. valve core block; 9. pressure cone cap; 10. inner cooperative rod; 11. lower valve stem; 12. upper pressure plate; 13. limit block; 14. connecting spring; 15. vent pipe. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: The essence of a conventional pressure regulating valve is to adjust the discharge pressure of a medium by changing the opening of an internal valve core structure. It can be applied to a variety of media. However, for high-temperature gas, taking high-temperature steam as an example, because the high-temperature gas is affected by the high-temperature environment, its actual pressure is significantly higher than the high-temperature gas's own pressure. This process will directly affect the pressure regulation process and increase the workload of the sealing structure in the valve stem. The following technical solutions are proposed: Reference Figure 1 to Figure 6 In this embodiment, a self-operated regulating valve for high-temperature gas comprises a valve body 1, a valve core 8 and an actuator 4, wherein the actuator 4 is provided with an upper valve stem 5 arranged downward, the valve core block 8 is located inside the valve body 1 and a lower valve stem 11 is arranged at the center of the upper end, and an action component is arranged between the upper valve stem 5 and the lower valve stem 11; The action component includes a bellows air pressure tube 7, an air film sleeve 6, and a limiting block 13. The upper end of the valve body 1 is respectively installed with a fixed sleeve 2 and a second-order sleeve 3 corresponding to the bellows air pressure tube 7 and the air film sleeve 6 from bottom to top. The lower valve stem 11 passes through the valve body 1 and the fixed sleeve 2 upward, and the upper end of the lower valve stem 11 is connected to the limiting block 13. A vertically arranged inner cooperating rod 10 is slidably installed inside the lower valve stem 11. The upper end of the inner cooperating rod 10 is connected to the lower end of the bellows air pressure tube 7. A pressure cone cap 9 is installed on the lower end of the inner cooperating rod 10. The upper end of the bellows air pressure tube 7 is fixedly connected to the upper end of the fixed sleeve 2, and the lower end of the bellows air pressure tube 7 is slidably connected to the inner wall of the fixed sleeve 2.

[0020] Working principle: For conventional pressure regulating valves, Figure 2 For example, the actuator 4 drives the valve core block 8 to move in the vertical direction, and the movement stroke of the valve core block 8 is used to change the opening inside the valve body 1, which is used to change the flow mode of the medium. This part is the operating principle of the conventional pressure regulating valve, which is not explained in detail in the present invention; However, the present invention adds an action component to the conventional valve stem structure, specifically, the upper valve stem 5 and the lower valve stem 11 cooperate with the second-order sleeve 3 and the fixed sleeve 2 to form a valve stem structure, specifically, the actuator 4 is used as the power source of the overall structure, and includes the following actions: Closing channel action: the upper end of the upper valve stem 5 maintains sliding with the second-order sleeve 3, so that when the upper valve stem 5 moves downward, it will first squeeze the air film sleeve 6, and the air film sleeve 6 is in a compressed state and reaches a state that is difficult to continue to compress. In this process, because the lower end of the upper valve stem 5 is fixedly connected to the fixed sleeve 2, the upper valve stem 5 will also drive the fixed sleeve 2 to move downward, and the lower valve stem 11 is fixedly connected to the fixed sleeve 2, so that the fixed sleeve 2 directly drives the lower valve stem 8 and the valve core block 10 to move downward, directly blocking the medium flow channel inside the valve body 1; Open channel action: based on the closed channel action, when the actuator 4 drives the upper valve stem 5 to move upward, the air film sleeve 6 therein can be understood to be in a pulled state, so that the lower valve stem 11 is not subjected to the pressure from the upper valve stem 5, and the valve core block 8 is subjected to the medium pressure and tends to move upward, so that the medium channel inside the valve body 1 is opened.

[0021] Embodiment 2: Supplementary explanation of the sliding process of the inner cooperating rod in Embodiment 1: An inclined wedge block corresponding to the limiting block 13 is installed at the lower end position inside the fixed sleeve 2. The cross-section of the limiting block 13 is truncated cone-shaped. A connecting spring 14 is installed at the lower end position of the limiting block 13. The lower end position of the connecting spring 14 is installed at the inner wall position of the fixed sleeve 2. An upper pressure plate 12 is slidably installed at the middle position of the fixed sleeve 2 corresponding to the corrugated air pressure tube 7 and the limiting block 13. The upper pressure plate 12 and the inner cooperation rod 10 are slidably connected.

[0022] Solution Description: Refer to Figure 3 and Figure 5 To explain, when the valve core block 8 is in the open channel action or the closed channel action in the first embodiment, the pressure cone cap 9 therein will be subjected to the medium pressure from the valve body 1, thereby cooperating to drive the inner cooperative rod 10 to produce an upward movement trend. More specifically, when it is in the closed channel action, because the medium is difficult to discharge, the pressure cone cap 9 will be subjected to greater pressure; when it is in the open channel action, because a part of the medium continues to flow through the medium channel in the valve body 1, the pressure on the pressure cone cap 9 is reduced; In combination with the above content, it should be explained that: because the pressure regulating valve proposed by the present invention is mainly for the medium of high-temperature gas, according to the ideal gas equation, it can be obtained that in a relatively closed space, the gas pressure increases with the increase of gas temperature. When the channel is closed, a completely closed space is formed inside the valve body 1, so that the internal pressure continues to rise. In this state, the internal cooperation rod 10 moves upward with a greater amplitude; When in the open channel action, a part of the medium has flowed out through the medium channel, but because of the change in medium temperature, a part of the medium pressure will act on the pressure cone cap 9, which will also cause the inner cooperative rod 10 to show a tendency to move upward. The only difference is that the upward movement amplitude of the inner cooperative rod 10 in the open channel action is relatively low.

[0023] Embodiment 3: The present invention uses the upper valve stem and the lower valve stem as the valve stem structure in a conventional pressure regulating valve. This embodiment provides a supplementary explanation of the movement process of the upper valve stem and the lower valve stem: The air film sleeve 6 is arranged in the internal position of the second-order sleeve 3, and the air film sleeve 6 is located in the middle position of the upper valve stem 5, the upper end position of the upper valve stem 5 and the second-order sleeve 3 are fixedly connected, and the lower end position of the upper valve stem 5 and the upper end position of the fixed sleeve 2 are slidingly connected, the lower valve stem 11 and the lower end position of the fixed sleeve 2 are slidingly connected, the lower end part of the upper valve stem 5 is hollow inside, the interior of the air film sleeve 6 and the interior of the corrugated air pressure tube 7 are connected through the upper valve stem 5, the internal space of the fixed sleeve 2 corresponding to the corrugated air pressure tube 7 and the upper pressure plate 12 is set as a back-pressure chamber, and a ventilation pipe 15 is installed on the outside of the second-order sleeve 3 and the fixed sleeve 2, and the interior of the air film sleeve 6 is connected with the interior of the back-pressure chamber through the ventilation pipe 15.

[0024] Solution description: Combined with Example 1 and Example 2, in order to ensure that the valve body 1 is in the closed channel action, it is necessary to ensure that the upper valve stem 5 of the upper part completely squeezes the air film sleeve 6, so that the force can be directly transmitted to the fixed sleeve 2. Because the upper end of the corrugated air pressure tube 7 is directly fixed in the internal position of the fixed sleeve 2, it should be noted that the gas squeezed out of the air film sleeve 6 is directly injected into the back pressure chamber through the vent pipe 15. In this process, the gas squeezed into the back pressure chamber will provide downward pressure on the upper pressure plate 12, ensuring that the limit block 13 drives the valve core block 8 to show a downward movement trend. Related instructions are also required for this: S1: Because the lower valve stem 11 needs to ensure that the valve core block 8 can move, and the movement direction is limited to the downward direction, an inclined wedge block corresponding to the limit block 13 is provided inside the fixed sleeve 2, and its purpose is to ensure that: the limit block 13 can move slightly downward relative to the inclined wedge block, but will not have an upward movement trend, and the upper pressure plate 12 will not interfere with the movement process of the inner cooperative rod 10, and only when the upper pressure plate 12 is under pressure, the pressure is transferred to the limit block 13; S2: In conjunction with the inner cooperating rod 10, it is explained that: whether in the closing channel action or the opening channel action, the inner cooperating rod 10 moves upward under the action of the medium pressure, referring to Figure 6To explain, the bellows air pressure tube 7 is supported by the inner cooperative rod 10, so that the internal volume of the bellows air pressure tube 7 is reduced, but because the lower end portion of the upper valve stem 5 is hollow, the bellows air pressure tube 7 will squeeze its internal gas into the air film sleeve 6 when compressed. This is supplemented by combining the opening channel action or the closing channel action: S2-1: When the channel is opened, the squeezing force of the upper valve stem 5 on the air film sleeve 6 is reduced, and after the air film sleeve 6 is replenished with gas from the internal gas of the corrugated air pressure tube 7, the internal gas of the two will be indirectly squeezed back into the back pressure chamber, thereby continuing to provide downward pressure on the valve core block 8. Its essence is to maintain the opening of the valve core block 8 relative to the valve body 1, and prevent the valve core block 8 from being further expanded due to "extra pressure"; S2-2: When the channel is closed, because the air film sleeve 6 is in a completely squeezed state, even if the air film sleeve 6 is supplemented with gas from the inside of the corrugated air pressure tube 7, it will directly flow back to the back pressure chamber to increase the contact strength between the valve core block 8 and the inside of the valve body 1, thereby avoiding the problem of internal leakage caused by separation between the valve core block 8 and the inside of the valve body 1 due to large fluctuations in the medium pressure.

[0025] Combined with the above-mentioned S1 and S2, it can be understood that: no matter whether the medium channel inside the valve body 1 is in an open or closed state, the secondary sliding process caused by the change of medium pressure on the inner cooperative rod 10 is specifically utilized to make the inner cooperative rod 10 generate upward pressure, and through the gas replenishment process generated by the volume change, the gas inside the air film sleeve 6 and the corrugated air pressure tube 7 is re-replenished into the back pressure chamber, so that the overall limiting block 13 and the valve core block 8 are subjected to a pressure in the opposite direction to the medium pressure, so as to maintain the opening of the valve core block 8 relative to the valve body 1.

[0026] In summary: based on the conventional pressure regulating valve, because the high-temperature gas is affected by its own temperature environment and its pressure fluctuates, the conventional regulating valve structure is improved, which is manifested in that an action component is added to the valve core block. The action component is based on a corrugated air pressure tube and an internal cooperative rod. When the valve core block maintains vertical movement, the internal cooperative block moves secondary with the change of the internal pressure of the valve body, and during the pressure conversion process of the corrugated air pressure tube and the air film sleeve, the upper pressure plate provides downward pressure on the limit block. The purpose is: on the basis of not affecting the medium pressure, the adaptive movement of the valve core block is achieved through the secondary sliding process, and the free opening can be adjusted on the basis of maintaining the process requirements of the internal opening of the valve body.

[0027] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A self-operated regulating valve for high temperature gas, comprising a valve body, a valve core and an actuator, characterized in that: The actuator is equipped with an upper valve stem arranged downward, the valve core block is located inside the valve body and a lower valve stem is installed at the center point of the upper end, and an action component is arranged between the upper valve stem and the lower valve stem; The action component includes a corrugated air pressure tube, an air film sleeve, and a direction limiting block. The upper end of the valve body is respectively installed with a fixed sleeve and a second-order sleeve corresponding to the corrugated air pressure tube and the air film sleeve from bottom to top. The lower valve stem passes through the valve body and the fixed sleeve upward, and the upper end of the lower valve stem is connected to the direction limiting block. A vertically arranged inner cooperating rod is slidably installed inside the lower valve stem, and the upper end of the inner cooperating rod is connected to the lower end of the corrugated air pressure tube.

2. A self-operated regulating valve for high temperature gas according to claim 1, characterized in that: A pressure cone cap is installed at the lower end of the inner cooperating rod, the upper end of the corrugated air pressure tube is fixedly connected to the inner upper end of the fixed sleeve, and the lower end of the corrugated air pressure tube is slidably connected to the inner wall of the fixed sleeve.

3. A self-operated regulating valve for high temperature gas according to claim 2, characterized in that: An oblique wedge block corresponding to the limiting block is installed at the lower end of the interior of the fixing sleeve, and the cross section of the limiting block is in a truncated cone shape.

4. A self-operated regulating valve for high temperature gas according to claim 1, characterized in that: A connecting spring is installed at the lower end of the limiting block, and the lower end of the connecting spring is installed in the inner wall of the fixing sleeve.

5. A self-operated regulating valve for high temperature gas according to claim 1, characterized in that: An upper pressure plate is slidably mounted on the middle position of the fixed sleeve corresponding to the corrugated air pressure tube and the limiting block, and the upper pressure plate is slidably connected to the inner cooperating rod.

6. A self-operated regulating valve for high temperature gas according to claim 1, characterized in that: The air film sleeve is arranged in the internal position of the second-order sleeve, and the air film sleeve is located in the middle position of the upper valve stem, the upper end position of the upper valve stem and the second-order sleeve are fixedly connected, and the lower end position of the upper valve stem and the upper end position of the fixed sleeve are slidingly connected, and the lower valve stem and the lower end position of the fixed sleeve are slidingly connected.

7. A self-operated regulating valve for high temperature gas according to claim 1, characterized in that: The interior of the lower end portion of the upper valve stem is hollow, and the interior of the air film sleeve is communicated with the interior of the corrugated air pressure tube through the upper valve stem.

8. A self-operated regulating valve for high temperature gas according to claim 1, characterized in that: The internal space of the fixed sleeve corresponding to the corrugated air pressure tube and the upper pressure plate is set as a back-pressure chamber, and a ventilation pipe is installed on the external position of the second-order sleeve and the fixed sleeve, and the interior of the air film sleeve is connected with the interior of the back-pressure chamber through the ventilation pipe.

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