A spiral cooling high-temperature back pressure regulating valve

Abstract

The present invention relates to the technical field of valves, and particularly to a spiral cooling high-temperature back pressure regulating valve, which comprises a valve body. A conveying channel for conveying a medium is arranged in the valve body. The valve body also comprises a valve core which is arranged in the conveying channel. The valve body is provided with a water inlet pipe and a water outlet pipe through which a heat exchange medium passes. A heat exchange cavity for heat exchange is arranged in the valve core. One end of the water inlet pipe passes through the conveying channel and is arranged on the valve core. The water inlet channel of the water inlet pipe is communicated with one end of the heat exchange cavity. One end of the water outlet pipe passes through the conveying channel and is arranged on the valve core. During use, a composite technology of spiral channel water cooling and impact cooling is adopted to uniformly cool local high-temperature components, ensuring the safety and reliability of the valve. The first heat exchange section with a waist-shaped cross section will not cause the medium to have turbulence, and there will be no disorder behind the valve. The medium flows out behind the valve in a laminar flow, reducing valve noise and valve vibration.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a spiral cooling high-temperature backpressure regulating valve. Background Art

[0002] At present, the total pressure ratio of heavy-duty gas turbines has reached nearly twenty-five and is developing towards a higher level. Under such high pressures, key performance indicators such as the wall temperature of the flame tube / transition section of the combustion chamber and pollutant emissions may be significantly different from those under low-pressure conditions. Conducting experimental research on the high-pressure or even full-pressure of the combustion chamber is a necessary means. The high-temperature backpressure regulating valve is used in the combustion chamber test platform of high-efficiency and low-carbon gas turbines. By using the principle of throttling backpressure to increase the combustion chamber pressure, the existing regulating valve's cooling water directly enters and flows out. The heat exchange time between the cooling water of the regulating valve and the medium is short, and heat exchange cannot be fully carried out, resulting in low heat exchange efficiency. At the same time, the cooling water will generate turbulence when passing through the valve body, leading to disorder behind the valve. The medium flows out behind the valve in a laminar flow, generating valve noise and valve vibration, which affects the normal use of the valve. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to solve the problem that the cooling water of the existing regulating valve generates turbulence when passing through the valve body, resulting in disorder behind the valve. The medium flows out behind the valve in a laminar flow, generating valve noise and valve vibration, which affects the normal use of the valve. Now, a spiral cooling high-temperature backpressure regulating valve is provided.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a spiral cooling high-temperature backpressure regulating valve, including a valve body. A conveying channel for conveying a medium is arranged in the valve body. The valve body also includes a valve core. The valve core is arranged in the conveying channel. The valve body is provided with a water inlet pipe and a water outlet pipe for the heat exchange medium to pass through. A heat exchange cavity for heat exchange is arranged in the valve core. One end of the water inlet pipe passes through the conveying channel and is arranged on the valve core. The water inlet channel of the water inlet pipe is communicated with one end of the heat exchange cavity. One end of the water outlet pipe passes through the conveying channel and is arranged on the valve core. The water outlet channel of the water outlet pipe is communicated with the other end of the heat exchange cavity;

[0005] The water inlet channel includes a first input section, a first heat exchange section, and a first output section. One end of the first input section is connected to one end of the first heat exchange section. The other end of the first heat exchange section is connected to one end of the first output section. The first heat exchange section is located between the valve core and the conveying channel. The first heat exchange section is a spiral structure, and the cross-section of the first heat exchange section is kidney-shaped.

[0006] Preferably, in some embodiments, the water outlet channel includes a second input section, a second heat exchange section, and a second output section. One end of the second input section is connected to one end of the second heat exchange section, and the other end of the second heat exchange section is connected to one end of the second output section. The second heat exchange section is located between the valve core and the conveying channel, and the second heat exchange section is a spiral structure.

[0007] Preferably, in some embodiments, the cross-section of the second heat exchange section is kidney-shaped.

[0008] Preferably, in some embodiments, the heat exchange cavity includes a third input section, an annular cavity body, and a third output section provided on the valve core. The annular cavity body is respectively communicated with the third input section and the third output section.

[0009] Preferably, in some embodiments, the annular cavity body has an inlet section, a heat exchange section, and a discharge section connected in sequence.

[0010] Preferably, in some embodiments, a first partition is spirally arranged in the annular cavity body to form a first spiral channel, and the first spiral channel is located in the heat exchange section.

[0011] Preferably, in some embodiments, a second partition is spirally arranged in the annular cavity body to form a second spiral channel, and the second spiral channel is located in the discharge section.

[0012] Preferably, in some embodiments, the inlet section is conical. One end of the third input section is communicated with the small end of the inlet section, the large end of the inlet section is communicated with the heat exchange section, and a guide plate for guiding the medium from the small end to the large end of the inlet section is arranged in the inlet section.

[0013] The beneficial effects of the present invention are as follows: When the spiral cooling high-temperature backpressure regulating valve of the present invention is in use, a composite technology of spiral channel water cooling and impact cooling is adopted to uniformly cool local high-temperature components, ensuring the safety and reliability of the valve. The first heat exchange section with a kidney-shaped cross-section will not cause the medium to be turbulent, and there will be no disorder behind the valve. The medium flows out behind the valve in a laminar flow, reducing the valve noise and valve vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the drawings and embodiments.

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 is a front view of the present invention;

[0017] Figure 3 is an internal structural schematic diagram of the present invention;

[0018] Figure 4It is a schematic three-dimensional structure diagram of the valve core in the present invention;

[0019] Figure 5 It is a schematic internal structure diagram of the valve core in the present invention Figure 1 ;

[0020] Figure 6 It is a schematic internal structure diagram of the valve core in the present invention Figure 2 ;

[0021] Figure 7 It is a schematic internal structure diagram of the valve core in the present invention Figure 3 ;

[0022] Figure 8 It is a schematic three-dimensional structure diagram of the water inlet pipe in the present invention;

[0023] Figure 9 It is a schematic internal structure diagram of the water inlet pipe in the present invention;

[0024] Figure 10 It is the front view of the water inlet pipe in the present invention;

[0025] Figure 11 It is Figure 10 The A-A sectional view in;

[0026] Figure 12 It is Figure 10 The B-B sectional view in;

[0027] Figure 13 It is a schematic three-dimensional structure diagram of the water outlet pipe in the present invention;

[0028] Figure 14 It is a schematic internal structure diagram of the water outlet pipe in the present invention Figure 1 ;

[0029] Figure 15 It is a schematic internal structure diagram of the water outlet pipe in the present invention Figure 2 .

[0030] In the figure: 1. Valve body, 101. Delivery channel;

[0031] 2. Valve core, 201. Heat exchange cavity, 2011. Third input section, 2013. Third output section, 2015. Heat exchange section, 2017. First spiral channel, 2018. Second spiral channel, 2019. Deflector; 3. Water inlet pipe, 301. First input section, 302. First heat exchange section, 303. First output section, 304. Water inlet channel;

[0032] 4. Water outlet pipe, 401. Second input section, 402. Second heat exchange, 403. Second output section, 404. Water outlet channel. Detailed implementation manners

[0033] The present invention will be further described in detail below in conjunction with embodiments:

[0034] The present invention is not limited to the following specific embodiments. Those of ordinary skill in the art can implement the present invention in other various specific embodiments according to the content disclosed in the present invention. Or, any simple changes or modifications made by adopting the design structure and concept of the present invention fall within the protection scope of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] Such as Figures 1 - 15As shown in the figure, a spiral cooling high-temperature back pressure regulating valve includes a valve body 1 and a valve core 2. A conveying channel 101 for conveying a medium is provided inside the valve body 1, and a valve core 2 is arranged inside the conveying channel 101. The valve core 2 is arranged inside the conveying channel 101. One water inlet pipe 3 and three water outlet pipes 4 for the heat exchange medium to pass through are provided on the valve body 1. One water inlet pipe 3 and three water outlet pipes 4 are evenly arranged on the valve body 1 in a circumferential manner. A heat exchange cavity 201 for heat exchange is provided inside the valve core 2. One end of the water inlet pipe 3 passes through the conveying channel 101 and is arranged on the valve core 2. The water inlet channel 304 of the water inlet pipe 3 is communicated with one end of the heat exchange cavity 201. One end of the water outlet pipe 4 passes through the conveying channel 101 and is arranged on the valve core 2. The water outlet channel 404 of the water outlet pipe 4 is communicated with the other end of the heat exchange cavity 201;

[0038] The water inlet channel 304 includes a first input section 301, a first heat exchange section 302, and a first output section 303. One end of the first input section 301 is connected to one end of the first heat exchange section 302, and the other end of the first heat exchange section 302 is connected to one end of the first output section 303. The first heat exchange section 302 is located between the valve core 2 and the conveying channel 101, and the first heat exchange section 302 is a spiral structure;

[0039] The cross section of the first heat exchange section 302 is waist-shaped. Through the waist-shaped first heat exchange section 302, water is pumped to the inner wall of the water pipe. Using the water impact cooling principle, the cooling water is sprayed unidirectionally onto the valve core 2 heated by high-temperature steam, so that the temperature of the high-temperature valve core 2 wall is reduced, the medium will not generate turbulence, and there will be no disorder behind the valve. The medium flows out behind the valve in a laminar flow, reducing valve noise and valve vibration. In addition, the spiral-shaped first heat exchange section 302 enables the cooling water to exchange heat evenly and fully.

[0040] The water outlet channel 404 includes a second input section 401, a second heat exchange section 402, and a second output section 403. One end of the second input section 401 is connected to one end of the second heat exchange section 402, and the other end of the second heat exchange section 402 is connected to one end of the second output section 403. The second heat exchange section 402 is located between the valve core 2 and the conveying channel 101, and the second heat exchange section 402 is a spiral structure.

[0041] The cross section of the second heat exchange section 402 is waist-shaped. In this embodiment, the waist shapes of the first heat exchange section 302 and the second heat exchange section 402 are similar to the shape of a runway, that is, the middle is a straight section and both ends are transitioned by arc sections. At the same time, the internal structures of the water inlet pipe 3 and the three water outlet pipes 4 are the same, that is, the second input section 401 of the water outlet channel 404 has the same structure as the first input section 301 of the water inlet channel 304, the first heat exchange section 302 has the same structure as the second heat exchange section 402, and the second output section 403 and the first output section 303 have the same structure.

[0042] The heat exchange cavity 201 includes a third input section 2011 provided on the valve core 2, an annular cavity body, and a third output section 2013. The annular cavity body is respectively communicated with the third input section 2011 and the third output section 2013.

[0043] The annular cavity body has an inlet section, a heat exchange section 2015, and a discharge section connected in sequence.

[0044] A first partition is spirally arranged in the annular cavity body to form a first spiral channel 2017, and the first spiral channel 2017 is located in the heat exchange section 2015.

[0045] A second partition is spirally arranged in the annular cavity body to form a second spiral channel 2018, and the second spiral channel 2018 is located in the discharge section.

[0046] The inlet section is conical. One end of the third input section 2011 is communicated with the small end of the inlet section, the large end of the inlet section is communicated with the heat exchange section 2015, and a flow guide plate 2019 for guiding the medium from the small end to the large end of the inlet section is arranged in the inlet section.

[0047] When the above-mentioned spiral cooling high-temperature back pressure regulating valve is in use, the conveying channel 101 of the valve body 1 conveys high-temperature steam. The high-temperature steam passes through the gap between the valve core 2 and the conveying channel 101. At the same time, the steam passes through the first heat exchange section 302 of the water inlet pipe 3. Then, cooling water is input from one water inlet pipe 3. The cooling water enters the first heat exchange section 302 of the spiral structure through the first input end of the water inlet pipe 3. Water lines are arranged on the inner peripheral wall of the first heat exchange section 302, and the water lines increase the heat exchange area and improve the heat exchange efficiency. Then, it enters the third input section 2011 of the valve core 2 through the first output section 303. The cooling water is conveyed to the annular cavity body through the third input section 2011, and sequentially passes through the inlet section, the heat exchange section 2015, and the discharge section of the annular cavity body. The cooling water spirally conveys in the first spiral channel 2017 in the heat exchange section 2015 and exchanges heat with the medium outside the valve core 2, making the heat exchange uniform and improving the heat exchange efficiency. Then, the cooling water is spirally accelerated and discharged to the third input section 2011 through the second spiral channel 2018. The third input section 2011 conveys the cooling water to the second input section 401 of the water outlet channel 404 on the water outlet pipe 4 again. The second input section 401 conveys the cooling water to the second heat exchange section 402 to continue exchanging heat with the steam. The cooled cooling water is discharged from the water outlet pipe 4 through the second output section 403, completing the cooling heat exchange.

[0048] The spiral first heat exchange section 302, second heat exchange section 402, and third heat exchange section 2015 can make the cooling water flow uniformly, better control the flow rate of the cooling water, make the temperature uniform on the windward side and the leeward side, and prevent local overheating. The spiral first heat exchange section 302, second heat exchange section 402, and third heat exchange section 2015 increase the contact area and contact the cooling water inside and outside simultaneously, enabling the cooling water to better achieve the cooling function of the ultra-high temperature medium material. Additionally, spraying a hydrophobic coating inside the spiral first heat exchange section 302, second heat exchange section 402, and third heat exchange section 2015 can resist wear, prevent rust, prevent dirt accumulation, and also extend the service life of stainless steel, better extending the service life of the water cooling structure.

[0049] The regulating valve adopts the principle of impingement cooling, allowing the cooling water to pass through the kidney-shaped water inlet channel 304 and spray onto the inner wall of the water inlet channel 304, causing the cooling water to impinge on the inner wall surface, enabling the cooling water to conduct heat convection with the high-temperature pipeline, thereby achieving sufficient heat exchange, ensuring that the temperature of the pipeline material in contact with the ultra-high temperature medium is not too high, and also ensuring the safety and reliability of the pipeline material; additionally, the kidney-shaped water inlet channel 304 participating in impingement cooling is only designed on one side of the valve body 1, aiming to preferentially cool the part of the valve body 1 directly in contact with the ultra-high temperature medium. Even if there is no impingement cooling device on the back of the valve body 1, its temperature will not be too high to cause the material to deform and fail.

[0050] The cooling water enters the third input section 2011 of the valve core 2 and flows towards the windward side of the annular cavity to form the second impingement cooling, and then flows out through the third output section 2013 of the valve core 2 into the water outlet flow channel of the water outlet pipe 4, causing the cooling water to spray onto the inner wall of the water outlet pipe 4 to form the third impingement cooling. Finally, it enters the second output section 403 of the water outlet pipe 4 along the spiral second heat exchange section 402 and then flows out of the valve core 2.

[0051] The inner walls of the water inlet pipe 3 and the water outlet pipe 4 are designed with water ripple structures corresponding to the spiral water inlet channel 304 and the water outlet channel 404. Water ripples with a depth of 1 mm are designed on the inner walls, which can increase the heat exchange area, improve the heat exchange efficiency, ensure uniform heat exchange between the cooling water and the pipeline material, reduce the possibility of the pipeline material changing its properties due to overheating in some areas, and thus ensure that each component can still work safely and reliably under ultra-high temperature conditions.

[0052] Based on the inspiration of the ideal embodiments of the present invention, through the above description, relevant staff can make various changes and modifications completely within the scope of not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A spiral cooling high back pressure regulating valve, comprising a valve body (1), wherein a conveying channel (101) for conveying a medium is arranged in the valve body (1), and is characterized in that: It further includes a valve core (2), the valve core (2) is arranged in the conveying channel (101), the valve core (2) is disposed within the conveying channel (101), the valve body (1) is provided with a water inlet pipe (3) and a water outlet pipe (4) for the heat exchange medium to pass through, a heat exchange cavity (201) for heat exchange is arranged within the valve core (2), one end of the water inlet pipe (3) passes through the conveying channel (101) and is arranged on the valve core (2), the water inlet channel (304) of the water inlet pipe (3) is communicated with one end of the heat exchange cavity (201), one end of the water outlet pipe (4) passes through the conveying channel (101) and is arranged on the valve core (2), and the water outlet channel (404) of the water outlet pipe (4) is communicated with the other end of the heat exchange cavity (201); The water inlet channel (304) includes a first input section (301), a first heat exchange section (302) and a first output section (303), one end of the first input section (301) is connected to one end of the first heat exchange section (302), the other end of the first heat exchange section (302) is connected to one end of the first output section (303), the first heat exchange section (302) is located between the valve core (2) and the conveying channel (101), the first heat exchange section (302) is in a spiral structure, and the cross-section of the first heat exchange section (302) is a waist shape; The heat exchange cavity (201) includes a third input section (2011) arranged on the valve core (2), an annular cavity body and a third output section (2013), and the annular cavity body is respectively communicated with the third input section (2011) and the third output section (2013); The annular cavity body has an inlet section, a heat exchange section (2015) and a discharge section connected in sequence; A first partition is spirally arranged within the annular cavity body to form a first spiral channel (2017), and the first spiral channel (2017) is located within the heat exchange section (2015); A second partition is spirally arranged within the annular cavity body to form a second spiral channel (2018), and the second spiral channel (2018) is located within the discharge section; The inlet section is conical, one end of the third input section (2011) is communicated with the small end of the inlet section, the large end of the inlet section is communicated with the heat exchange section (2015), and a guide plate (2019) for guiding the medium from the small end to the large end of the inlet section is arranged within the inlet section.

2. The spiral cooling high-temperature back pressure regulating valve according to claim 1, wherein: The water outlet channel (404) includes a second input section (401), a second heat exchange section (402) and a second output section (403), one end of the second input section (401) is connected to one end of the second heat exchange section (402), the other end of the second heat exchange section (402) is connected to one end of the second output section (403), and the second heat exchange section (402) is located between the valve core (2) and the conveying channel (101).

3. The spiral cooling high back pressure regulating valve according to claim 2, characterized in that: The second heat exchange section (402) is in a spiral structure.

4. A spiral cooling high-temperature backpressure regulating valve according to claim 2 or 3, characterized in that: The cross-section of the second heat exchange section (402) is a waist shape.

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