Totally-closed valve with opening degree controlled by static pressure and SOFC (Solid Oxide Fuel Cell) system

Abstract

The utility model discloses a totally-enclosed valve with opening controlled by static pressure and an SOFC (solid oxide fuel cell) system, the totally-enclosed valve comprises a valve base body and a control assembly, the valve base body is provided with a fluid channel and a moving cavity, and one end of the moving cavity is communicated with the fluid channel; the control assembly is arranged in the moving cavity and comprises a sliding piece and a telescopic piece, the sliding piece is arranged in the moving cavity in a sliding mode, and one end of the telescopic piece is fixedly connected with the sliding piece, so that the telescopic piece can drive the sliding piece to close the fluid channel when stretching out or can drive the sliding piece to open the fluid channel when contracting back; the telescopic piece is arranged to drive the sliding piece to move so as to open or close the valve, the executing mechanism does not need to be arranged in the valve base body, the executing mechanism and the valve base body can be placed at different positions, the situation that the executing mechanism cannot be operated in a high-temperature scene is avoided, and therefore the opening degree of the high-temperature valve can be controlled in a normal-temperature environment; and an electric actuating mechanism is replaced, and the use temperature range of the valve is widened.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a fully enclosed valve with static pressure controlled opening and a SOFC system. Background Art

[0002] Valves are essential components for controlling the fluid flow rate in pipelines. Existing valves for controlling the flow rate of high-temperature combustible gases are integrated with the actuator. When used in high-temperature scenarios, it is difficult to perform manual operations using mechanical actuators. When using electric actuators, since there are temperature requirements for the use of electric mechanisms, the operating temperature range of the valves is limited. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a fully enclosed valve with static pressure controlled opening and a SOFC system.

[0004] The fully enclosed valve with static pressure controlled opening according to the first aspect embodiment of the utility model includes a valve base body and a control assembly. The valve base body has a fluid passage and a moving cavity, and one end of the moving cavity communicates with the fluid passage; the control assembly is arranged in the moving cavity. The control assembly includes a sliding plate and a telescopic member that can extend by introducing a medium and contract by discharging the medium. The sliding plate is slidably arranged in the moving cavity, and one end of the telescopic member is fixedly connected to the sliding plate, so that when the telescopic member extends, it can drive the sliding plate to close the fluid passage, or when the telescopic member contracts, it can drive the sliding plate to open the fluid passage.

[0005] The fully enclosed valve with static pressure controlled opening according to the embodiment of the utility model has at least the following technical effects: By setting a telescopic member to drive the sliding plate to move to control the valve opening, it is realized that the actuator (the structure of the gas supply source) does not need to be arranged in the valve base body, and the two can be placed in different positions, thus avoiding the situation that the actuator cannot be operated in high-temperature scenarios, so that the opening of the high-temperature valve can be controlled in a normal-temperature environment, and the electric actuator is replaced, improving the operating temperature range of the valve.

[0006] According to some embodiments of the utility model, the valve base body has a medium inlet and outlet, and the inside of the telescopic member has an inlet and outlet cavity, and the inlet and outlet cavity communicates with the medium inlet and outlet.

[0007] According to some embodiments of the utility model, a sealing plate is arranged at the other end of the moving cavity. The outer peripheral wall of the sealing plate is fixedly connected to the side wall of the moving cavity in a sealed manner. The other end of the telescopic member is fixedly connected to the sealing plate in a sealed manner. The telescopic member and the sealing plate enclose to form the inlet and outlet cavity, and the medium inlet and outlet is located on the sealing plate.

[0008] According to some embodiments of the present utility model, a baffle is provided in the moving cavity. The baffle has a communication hole, and the sliding piece is movably located in the communication hole.

[0009] According to some embodiments of the present utility model, the side wall of the moving cavity has a limiting block. Two abutting portions are provided at the position of the sliding piece corresponding to the limiting block. The two abutting portions are arranged at intervals along the moving direction of the sliding piece, and the limiting block is located between the two abutting portions.

[0010] According to some embodiments of the present utility model, a notch is provided at the position of the sliding piece corresponding to the limiting block. The limiting block is located in the notch, and the two side walls of the notch opposite to each other along the moving direction of the sliding piece are the two abutting portions.

[0011] According to some embodiments of the present utility model, the telescopic member is in a cylindrical shape, and the tube wall of the telescopic member includes alternately arranged corrugated peak portions and corrugated valley portions along the sliding direction of the sliding piece.

[0012] According to some embodiments of the present utility model, the valve base body includes a first pipe body and a second pipe body. The axis of the first pipe body is perpendicular to the axis of the second pipe body. One end of the first pipe body has a fluid inlet communicating with the fluid passage, and the other end of the first pipe body has a fluid outlet communicating with the fluid passage. The fluid passage is located on the first pipe body, the moving cavity is located on the second pipe body, and the connection part where the second pipe body is connected to the first pipe body is located between the fluid inlet and the fluid outlet.

[0013] According to some embodiments of the present utility model, the shape of the end of the sliding piece away from the telescopic member is arc-shaped.

[0014] The SOFC system according to the second aspect embodiment of the present utility model includes the fully enclosed valve, the stack and the pressure controller of the first embodiment. The stack has a fuel fluid outlet, and the fuel fluid outlet communicates with one end of the fluid passage; the pressure controller is connected to the valve base body, and the pressure controller is used to control the medium to flow into or out of the telescopic member.

[0015] The SOFC system according to the embodiment of the present utility model has at least the following technical effects: by providing a fully enclosed valve, the flow control of high-temperature combustible gas can be satisfied.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the utility model. Description of the Drawings

[0017] Additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0018] Figure 1 A cross-sectional view of a fully enclosed valve at a certain location;

[0019] Figure 2 A cross-sectional view of a fully enclosed valve at another location;

[0020] Figure 3 A schematic structural diagram of a SOFC system.

[0021] Reference numerals: valve base body 100, fluid passage 110, moving chamber 120, baffle 121, communication hole 1211, limit block 122, medium inlet and outlet 130, sealing plate 140, first pipe body 150, fluid inlet 151, fluid outlet 152, second pipe body 160, control assembly 200, sliding piece 210, abutting portion 211, notch 212, telescopic member 220, inlet and outlet chamber 221, corrugation peak portion 222, corrugation valley portion 223, stack 300, fuel fluid outlet 310, pressure controller 400. Detailed implementation manners

[0022] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0023] In the description of the present utility model, it should be understood that for the orientation description, such as up, down, front, back, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0024] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0025] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0026] Referring to Figure 1 As shown, the fully enclosed valve for controlling the opening degree by static pressure according to the first embodiment of the present utility model includes a valve base body 100 and a control assembly 200. The valve base body 100 has a fluid passage 110 and a moving chamber 120. One end of the moving chamber 120 is communicated with the fluid passage 110; the control assembly 200 is arranged in the moving chamber 120. The control assembly 200 includes a sliding plate 210 and a telescopic member 220 that can extend when the medium is introduced and contract when the medium is discharged. The sliding plate 210 is slidably arranged in the moving chamber 120. One end of the telescopic member 220 is fixedly connected to the sliding plate 210, so that when the telescopic member 220 extends, it can drive the sliding plate 210 to close the fluid passage 110, or when the telescopic member 220 contracts, it can drive the sliding plate 210 to open the fluid passage 110.

[0027] By providing the telescopic member 220 to drive the sliding plate 210 to move, the opening or closing of the valve is realized, so that the actuator (the structure of the air supply source) does not need to be arranged in the valve base body 100, and the two can be placed in different positions, thereby avoiding the situation where the actuator cannot be operated in a high-temperature scenario. Therefore, the opening degree of the high-temperature valve can be controlled in a normal-temperature environment, and the electric actuator is replaced, improving the temperature range of use of the valve.

[0028] During operation, the pressure control source introduces the medium onto the telescopic member 220. The telescopic member 220 extends, and the telescopic member 220 drives the sliding plate 210 to move towards the direction close to the fluid passage 110, so that the sliding plate 210 closes the fluid passage 110;

[0029] The pressure control source discharges the medium from the telescopic member 220. The telescopic member 220 contracts, and the telescopic member 220 drives the sliding plate 210 to move away from the fluid passage 110, so that the sliding plate 210 opens the fluid passage 110.

[0030] Specifically, the medium is high-pressure nitrogen; the telescopic member 220 is a flexible structure.

[0031] In some embodiments of the present utility model, as Figure 1 shown, the valve base body 100 has a medium inlet / outlet 130. The inside of the telescopic member 220 has an inlet / outlet chamber 221, and the inlet / outlet chamber 221 is communicated with the medium inlet / outlet 130.

[0032] By providing the medium inlet / outlet 130, it is convenient to connect with an external pressure control source.

[0033] When the valve needs to be closed, the pressure control source injects high-pressure nitrogen into the inlet / outlet cavity 221 through the medium inlet / outlet 130, causing the pressure in the inlet / outlet cavity 221 to increase. The length of the telescopic member 220 along the axial direction becomes longer, pushing the sliding vane 210 to reduce the flow area of the fluid passage 110. When the valve needs to be opened, the pressure control source discharges the high-pressure nitrogen in the inlet / outlet cavity 221 through the medium inlet / outlet 130, causing the pressure in the inlet / outlet cavity 221 to decrease. The length of the telescopic member 220 along the axial direction shortens, pushing the sliding vane 210 to increase the flow area of the fluid passage 110.

[0034] In a further embodiment of the present utility model, as Figure 1 shown, a sealing plate 140 is provided at the other end of the moving cavity 120. The outer peripheral wall of the sealing plate 140 is fixedly sealed and connected to the side wall of the moving cavity 120. The other end of the telescopic member 220 is fixedly sealed and connected to the sealing plate 140. The telescopic member 220 and the sealing plate 140 enclose to form the inlet / outlet cavity 221, and the medium inlet / outlet 130 is located on the sealing plate 140.

[0035] By fixedly sealing and connecting the sealing plate 140 to the moving cavity 120 and fixedly sealing and connecting it to the telescopic member 220, there is no need to use a sealing ring, which seals between the valve body and the external environment and also seals between the fluid environment and the inlet / outlet cavity 221. Thus, the valve body does not need to adopt materials and sealing structures with high requirements, reducing the manufacturing cost of the valve. And without using an electric actuator, the valve can be used in a high-temperature environment.

[0036] Specifically, the connection between the outer peripheral wall of the sealing plate 140 and the side wall of the moving cavity 120 is a welded connection.

[0037] In some embodiments of the present utility model, as Figure 1 shown, a baffle 121 is provided in the moving cavity 120. The baffle 121 has a communication hole 1211. The sliding vane 210 is movably located in the communication hole 1211. By providing the baffle 121, the sliding vane 210 is limited and supported to prevent the sliding vane 210 from deforming under the impact of the fluid.

[0038] In some embodiments of the present utility model, as Figure 2 shown, the side wall of the moving cavity 120 has a limiting block 122. The sliding vane 210 is provided with two abutting portions 211 corresponding to the position of the limiting block 122. The two abutting portions 211 are arranged at intervals along the moving direction of the sliding vane 210. The limiting block 122 is located between the two abutting portions 211. By providing the cooperation of the two abutting portions 211 and the limiting block 122, the stroke of the sliding vane 210 is restricted, and thus the maximum and minimum opening degrees of the valve can be controlled.

[0039] During operation, after the sliding vane 210 moves a certain distance, one of the abutting portions 211 on the sliding vane 210 abuts against the limiting block 122, and the limiting block 122 blocks the movement of the sliding vane 210, thereby controlling the maximum and minimum opening degrees of the control valve.

[0040] In a further embodiment of the present invention, as Figure 2 shown, the sliding vane 210 is provided with a notch 212 at the position corresponding to the limiting block 122. The limiting block 122 is located within the notch 212. The two side walls of the notch 212 that are oppositely arranged along the moving direction of the sliding vane 210 are two abutting portions 211. The sliding vane 210 adopts such a structure to simplify the structure of the sliding vane 210 and the valve base 100.

[0041] In a further embodiment of the present invention, as Figure 1 shown, the telescopic member 220 is in a tubular shape. The tube wall of the telescopic member 220 includes corrugated peak portions 222 and corrugated valley portions 223 that are alternately arranged along the sliding direction of the sliding vane 210, so as to simplify the structure of the telescopic member 220.

[0042] When the pressure in the inlet and outlet chamber 221 increases, both the corrugated peak portions 222 and the corrugated valley portions 223 are straightened, and thus the telescopic member 220 extends;

[0043] When the pressure in the inlet and outlet chamber 221 decreases, the corrugated peak portions 222 and the corrugated valley portions 223 automatically return to their original shapes under the action of elastic recovery, automatically causing the telescopic member 220 to contract.

[0044] Specifically, the valve base 100, the sealing plate 140, the sliding vane 210, and the baffle 121 are all made of 316L stainless steel. The telescopic member 220 is made into a bellows shape. Under the condition of meeting the strength, the wall thickness of the telescopic member 220 can be reduced to obtain better extensible elasticity.

[0045] In some embodiments of the present invention, as Figure 1 shown, the valve base 100 includes a first pipe body 150 and a second pipe body 160. The axis of the first pipe body 150 is perpendicular to the axis of the second pipe body 160. One end of the first pipe body 150 has a fluid inlet 151 communicating with the fluid passage 110, and the other end of the first pipe body 150 has a fluid outlet 152 communicating with the fluid passage 110. The fluid passage 110 is located on the first pipe body 150, and the moving chamber 120 is located on the second pipe body 160. The connection portion where the second pipe body 160 is connected to the first pipe body 150 is located between the fluid inlet 151 and the fluid outlet 152; the first pipe body 150 and the second pipe body 160 are perpendicular, and the second pipe body 160 is located between the two ends of the first pipe body 150, so that the sliding vane 210 can better close the fluid passage 110.

[0046] In a further embodiment of the present invention, as Figure 2As shown, the shape of one end of the sliding piece 210 away from the telescopic member 220 is arc-shaped. The shape of the sliding piece 210 matches the inner wall of the first pipe body 150 to better close the fluid passage 110.

[0047] As Figure 3 shown, the SOFC system according to the first embodiment of the present invention includes the fully enclosed valve of the first embodiment, the stack 300, and the pressure controller 400; the stack 300 has a fuel fluid outlet 310, and the fuel fluid outlet 310 is communicated with the fluid inlet 151 of the fluid passage 110. The pressure controller 400 is connected to the medium inlet and outlet 130, and the pressure controller 400 is used to control the medium to flow into or out of the telescopic member 220.

[0048] Specifically, the pressure controller 400 is respectively connected to the high-pressure nitrogen and the medium inlet and outlet 130. At the same time, the pressure controller 400 also has a gas discharge pipe, which can discharge the gas in and out of the cavity 221.

[0049] The temperatures of the fuel and air downstream of the stack 300 are both above 700°C. In order to avoid oxidation of the anode of the stack 300 and for safety considerations during internal leakage, when the stack 300 is operating, it is required that the pressure P_fuel at the fuel fluid outlet 310 is greater than the pressure P_air at the air outlet.

[0050] During system operation, take P_fuel - P_air = 50 Pa as the control target, and the control allowable error is 10 Pa;

[0051] When the system detects that 40 Pa < P_fuel - P_air < 60 Pa, no operation is performed;

[0052] When the system detects that P_fuel - P_air < 40 Pa, the pressure controller 400 gradually transports high-pressure nitrogen to the cavity 221 in and out at a small flow rate until P_fuel - P_air reaches 50 Pa and then stops;

[0053] When the system detects that P_fuel - P_air > 60 Pa, the pressure controller 400 connects the gas discharge pipe to the cavity 221 in and out and gradually discharges the gas in the cavity 221 in and out at a small flow rate until P_fuel - P_air reaches 50 Pa and then stops.

[0054] In the description of this specification, the descriptions referring to terms such as "some embodiments" or "it is conceivable that" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0055] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A fully enclosed valve with static pressure controlled opening, characterized in that: include: A valve base body having a fluid channel and a moving cavity, wherein one end of the moving cavity is connected to the fluid channel; A control component is arranged in the movable cavity, and the control component includes a slide and a telescopic member that can extend when a medium is introduced and contract when the medium is discharged. The slide can be slidably arranged in the movable cavity, and one end of the telescopic member is fixedly connected to the slide, so that when the telescopic member is extended, the slide can be driven to close the fluid channel, or when the telescopic member is contracted, the slide can be driven to open the fluid channel.

2. The fully enclosed valve with static pressure control opening according to claim 1, characterized in that: The valve base has a medium inlet and outlet, and the interior of the telescopic member has an inlet and outlet cavity, and the inlet and outlet cavity is communicated with the medium inlet and outlet.

3. The fully enclosed valve with static pressure control opening according to claim 2, characterized in that: A sealing plate is provided at the other end of the movable cavity, the outer peripheral wall of the sealing plate is sealed and fixedly connected to the side wall of the movable cavity, the other end of the telescopic member is sealed and fixedly connected to the sealing plate, the telescopic member and the sealing plate enclose the inlet and outlet cavity, and the medium inlet and outlet are located on the sealing plate.

4. The fully enclosed valve with static pressure control opening according to claim 1, characterized in that: The movable cavity is provided with a baffle, the baffle has a communicating hole, and the sliding sheet is movably located in the communicating hole.

5. The fully enclosed valve with static pressure control opening according to claim 1, characterized in that: The side wall of the moving cavity is provided with a limit block, and the sliding plate is provided with two abutment parts at positions corresponding to the limit block. The two abutment parts are arranged at intervals along the moving direction of the sliding plate, and the limit block is located between the two abutment parts.

6. The fully enclosed valve with static pressure control opening according to claim 5, characterized in that: The slide is provided with a notch at a position corresponding to the limit block, the limit block is located in the notch, and two side walls of the notch oppositely arranged along the moving direction of the slide are the two abutment portions.

7. The fully enclosed valve with static pressure control opening according to any one of claims 1 to 6, characterized in that: The telescopic member is in a cylindrical shape, and the tube wall of the telescopic member includes wrinkle peaks and wrinkle valleys alternately arranged along the sliding direction of the sliding sheet.

8. The fully enclosed valve with static pressure controlled opening according to claim 1, characterized in that: The valve base includes a first tube body and a second tube body, the axis of the first tube body is arranged perpendicularly to the axis of the second tube body, one end of the first tube body has a fluid inlet connected to the fluid channel, and the other end of the first tube body has a fluid outlet connected to the fluid channel, the fluid channel is located on the first tube body, the movable cavity is located on the second tube body, and the connection between the second tube body and the first tube body is located between the fluid inlet and the fluid outlet.

9. The fully enclosed valve with static pressure controlled opening according to claim 8, characterized in that: The shape of the sliding piece away from one end of the telescopic member is arc-shaped.

10. A SOFC system, characterized in that: A fully enclosed valve with static pressure control opening as claimed in any one of claims 1 to 9; and further comprising: A fuel stack having a fuel fluid outlet, wherein the fuel fluid outlet is connected to one end of the fluid channel; A pressure controller is connected to the valve base, and is used to control the medium to flow into or be discharged from the telescopic member.

Images