A low-noise high-temperature steam pressure reducing valve

Abstract

The present invention provides a low-noise high-temperature steam pressure reducing valve, which comprises a valve body, a first rectifying device, a second rectifying device and a third rectifying device; the first rectifying device, the second rectifying device and the third rectifying device are installed in the flow channel of the valve body; the diversion tube bundle comprises a plurality of spiral pipes, and the mutually wound spiral pipes increase the speed and reduce the pressure of the high-temperature steam, and standardize the steam flow pattern. The second-stage rectifying device comprises a flow channel positioning vane and a flow channel dividing vane, which cooperate with each other to synchronously adjust the opening size of the steam conveying flow channel therein along with the valve opening; the third rectifying device comprises a conical valve core and an inlet throttle plate to prevent the generation of eddy currents. By rectifying the high-temperature steam in the valve body, the present invention greatly reduces the flow-induced noise in the valve body, reduces the huge impact force generated by the disordered high-temperature steam and the damage to the inner wall, enhances the stability of the valve body, prolongs the service life of the valve, and reduces the noise pollution to the environment.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a low-noise high-temperature steam pressure reducing valve. Background Art

[0002] With the construction and development of national key projects such as large-scale coal chemical industry and new energy projects, various complex working conditions continue to emerge, such as high temperature and high pressure, large flow, high pressure reduction ratio, etc. The traditional form of pressure reducing valve can no longer meet the requirements, and has the disadvantages of poor safety and reliability, short life, high noise, large vibration, and low working efficiency. The pressure reducing valve has a complex structure. When the fluid flows through the throttling elements such as the valve core, the pressure drops rapidly and supersonic flow occurs, which can easily lead to severe turbulence of the gas in the pressure reducing valve and generate large noise, which has a serious impact on the health of operators and the normal operation of equipment. Valve noise is an important source of noise in industrial production. Near large pipeline valves, the sound pressure level can exceed 100dB. In addition, excessive noise will cover up the danger signals issued by valves and other equipment during improper operation, which is easy to cause accidents.

[0003] Existing high-temperature steam valves have the problem of excessive noise during operation. Due to the high flow rate of high-temperature steam in the valve and steam transmission pipeline, flow-induced noise is easily generated. The huge impact force generated by the turbulent high-temperature steam causes serious damage to the inner wall of the steam transmission pipeline inside the valve, which poses a great threat to the stable operation of the entire steam transmission pipeline system, greatly shortens the service life of the valve and steam transmission pipeline, and also causes great harm to the environment. Workers who work next to the high-temperature steam transmission pipeline for many years will also be attacked by noise, which will cause a certain degree of damage to their health. Therefore, it is very necessary to rectify and reduce the noise of high-temperature steam to minimize the valve noise, both from an economic and environmental perspective. Summary of the invention

[0004] In view of the above technical problems, one of the objectives of one embodiment of the present invention is to provide a low-noise high-temperature steam pressure reducing valve to reduce the flow-induced noise inside the valve; one of the objectives of one embodiment of the present invention is that through the mutual rotation and winding of multiple spiral pipes of the first rectifying device's diversion tube bundle, the high-temperature steam is subdivided into multiple beams and makes a centripetal movement inside the spiral pipes of the diversion tube bundle, increasing the speed and decreasing the pressure of the high-temperature steam, rectifying the high-temperature steam, standardizing the flow pattern of the high-temperature steam, making the flow pattern of the high-temperature steam more stable, avoiding the erosion of the inner wall of the valve body by the high-temperature steam, reducing the damage to the inner wall of the steam transmission pipeline inside the valve, playing a very good role in the stable operation of the entire steam transmission pipeline system, extending the service life of the valve, reducing the invasion and damage of the noise to the staff working beside the high-temperature steam transmission pipeline, and greatly improving the working environment of the staff working beside the steam transmission pipeline equipment; one of the objectives of one embodiment of the present invention is that through the second rectifying device, arc-shaped flow channel positioning vanes and flow channel dividing vanes are provided. The flow channel positioning vanes can move up and down with the extension section of the valve stem and rotate inside the steam transmission flow channel, controlling the opening and closing of the steam transmission flow channel according to the opening degree of the valve, avoiding the generation of large flow-induced noise when the valve opening is small, and can also provide secondary protection in case of valve leakage. One of the objectives of one embodiment of the present invention is that through the third rectifying device, a conical valve core is used to control the high-temperature steam flow rate and rectify the high-temperature steam, preventing the formation of eddy currents in the valve core cavity by the high-temperature steam, reducing the noise generated by the high-temperature steam and the erosion of the valve core.

[0005] Note that the recitation of these objectives does not preclude the existence of other objectives. One embodiment of the present invention does not need to achieve all of the above objectives. Objectives other than the above can be extracted from the descriptions in the specification, drawings, and claims.

[0006] The technical solution of the present invention is as follows:

[0007] A low-noise high-temperature steam pressure reducing valve, comprising a valve body and a first rectifying device;

[0008] The first rectifying device is installed in the flow channel of the valve body. The first rectifying device includes a diversion tube bundle. The diversion tube bundle includes multiple spiral pipes. The multiple spiral pipes are wound around each other from top to bottom to form a twist-shaped diversion tube bundle. The upper end of the spiral pipe communicates with the flow channel of the valve inlet, and the lower end of the spiral pipe communicates with the valve outlet.

[0009] In the above solution, the upper parts of the multiple spiral pipes of the diversion tube bundle are in contact and gradually disperse from top to bottom.

[0010] In the above solution, an upper throttle plate is provided at the upper end of the diversion tube bundle, and a lower throttle plate is provided at the lower end; multiple honeycomb-shaped openings are provided on the upper throttle plate and the lower throttle plate, and the positions of the openings correspond to the openings of the spiral pipes on the diversion tube bundle.

[0011] In the above solution, sound-absorbing material is filled between the flow guide tube bundle and the inner wall of the valve body.

[0012] Furthermore, the sound-absorbing material is aluminum foam.

[0013] In the above solution, a second rectifying device is further included; the second rectifying device is located in the flow channel between the valve inlet and the first rectifying device; the second rectifying device includes an extended valve stem section, a valve stem sleeve, flow channel positioning vanes, flow channel dividing vanes, an upper cover of the flow channel space, and a bottom plate of the flow channel space; the upper part of the extended valve stem section is connected to the lower part of the valve stem in the valve body. The valve stem sleeve is provided with an upper cover of the flow channel space on the top and a bottom plate of the flow channel space on the bottom. The upper cover of the flow channel space and the bottom plate of the flow channel space are installed on the inner wall of the valve body. The bottom plate of the flow channel space is located above the flow guide tube bundle. Flow channel dividing vanes are provided in the flow channel between the upper cover of the flow channel space and the bottom plate of the flow channel space; the lower part of the extended valve stem section passes through the circular ring in the middle of the upper cover of the flow channel space and is connected to the valve stem sleeve. Arc-shaped flow channel positioning vanes are evenly arranged on the circumference of the valve stem sleeve. Each flow channel positioning vane is located in the steam delivery flow channel formed between adjacent arc-shaped flow channel dividing vanes; sealing vanes are evenly distributed on the outer circumference of the circular ring of the upper cover of the flow channel space. The sealing vanes have the same shape as the flow channel positioning vanes. The bottom plate of the flow channel space is provided with the same sealing vanes as the upper cover of the flow channel space. The sealing vanes on the upper cover of the flow channel space are located above the steam delivery flow channel, and the sealing vanes on the bottom plate of the flow channel space are located below the steam delivery flow channel; the extended valve stem section drives the valve stem sleeve to rotate, driving the flow channel positioning vanes to move in the steam delivery flow channel to adjust the opening and size of the steam delivery flow channel.

[0014] Furthermore, a gear is provided at the lower part of the extended valve stem section, and an internal gear 161 is provided on the inner wall of the valve stem sleeve. The gear meshes with the internal gear 161.

[0015] Furthermore, a sealing ring is provided between the extended valve stem section and the circular ring in the middle of the upper cover of the flow channel space.

[0016] In the above solution, a third rectifying device is further included; the third rectifying device includes a conical valve core and an inlet throttle plate. The conical valve core is arranged on the valve stem in the valve body, and an inlet throttle plate is provided at the valve inlet. The conical valve core can be attached to the inlet throttle plate.

[0017] Furthermore, the middle part of the conical valve core is in a raised conical shape, and the surface in contact with the inlet throttle plate is smooth.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] According to one embodiment of the present invention, the guide tube bundle of the first rectifying device is formed by multiple spiral pipes rotating and winding around each other, which divides the high-temperature steam into multiple bundles and makes the high-temperature steam move centripetally within the spiral pipes of the guide tube bundle, increasing the velocity of the high-temperature steam and reducing the pressure. This rectifies the high-temperature steam, standardizes the flow pattern of the high-temperature steam, makes the flow pattern of the high-temperature steam more stable, avoids the erosion of the inner wall of the valve body by the high-temperature steam, reduces the damage to the inner wall of the steam transmission pipeline inside the valve, plays a very good role in the stable operation of the entire steam transmission pipeline system, extends the service life of the valve, reduces the invasion and damage of the noise to the staff working beside the high-temperature steam transmission pipeline, and greatly improves the working environment of the staff working beside the steam transmission pipeline equipment.

[0020] According to one embodiment of the present invention, the second rectifying device is provided with arc-shaped flow path positioning vanes and flow path dividing vanes. The flow path positioning vanes can move up and down along with the extended section of the valve stem and rotate within the steam transmission flow path, controlling the opening and closing of the steam transmission flow path according to the opening degree of the valve, avoiding the generation of large flow-induced noise when the opening degree of the valve is small, and can also provide secondary protection in case of valve leakage.

[0021] According to one embodiment of the present invention, the third rectifying device controls the flow rate of the high-temperature steam by using a conical valve core and rectifies the high-temperature steam, preventing the formation of eddy currents in the valve core cavity by the high-temperature steam, reducing the noise generated by the high-temperature steam and the erosion of the valve core.

[0022] Note that the description of these effects does not prevent the existence of other effects. One embodiment of the present invention does not necessarily have all of the above effects. Other effects than those described above can be obviously seen and extracted from the descriptions in the specification, drawings, claims, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a low-noise high-temperature steam pressure reducing valve according to an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of the guide tube bundle according to an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of the upper throttle plate according to an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of the upper cover of the flow path space according to an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of the flow path positioning vanes and flow path dividing vanes according to an embodiment of the present invention;

[0028] Figure 6It is a schematic structural diagram of a valve stem sleeve and a gear according to an embodiment of the present invention.

[0029] In the figure: 1, valve stem; 2, conical valve core; 3, valve inlet; 4, valve seat; 5, valve stem extension section; 6, flow path positioning blade; 7, upper throttle plate; 701, upper throttle plate hole; 8, diversion tube bundle; 801, diversion tube inlet; 802, diversion tube outlet; 9, aluminum foam; 10, lower throttle plate; 101, lower throttle plate hole; 11, valve cover; 12, valve body; 13, inlet throttle plate; 14, upper cover of flow path space; 15, flow path dividing blade; 16, valve stem sleeve; 161, internal gear; 17, gear; 18, chassis of flow path space; 19, valve outlet. Specific embodiments

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote 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 intended to explain the present invention and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "front", "rear", "left", "right", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are 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 limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0032] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. 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 circumstances.

[0033] Figure 1Shown is a preferred embodiment of the low-noise high-temperature steam pressure reducing valve. The low-noise high-temperature steam pressure reducing valve includes a valve body 12, a valve stem 1, a first rectifying device, a second rectifying device, and a third rectifying device. The first rectifying device, the second rectifying device, and the third rectifying device are all installed in the flow channel of the valve body 12. The first rectifying device is installed at the flow channel near the valve outlet 19, the third rectifying device is installed at the flow channel near the valve inlet 3, and the second rectifying device is located between the first rectifying device and the third rectifying device.

[0034] According to this embodiment, preferably, the first rectifying device is installed in the flow channel of the valve body 12. The first rectifying device includes a guide flow tube bundle 8. The guide flow tube bundle 8 includes multiple spiral pipes. The multiple spiral pipes are wound around each other from top to bottom to form a twist-shaped guide flow tube bundle 8. The upper end of the spiral pipe communicates with the flow channel of the valve inlet 3, and the lower end of the spiral pipe communicates with the valve outlet 19.

[0035] According to this embodiment, preferably, the multiple spiral pipes of the guide flow tube bundle 8 are in contact with each other above and gradually disperse from top to bottom.

[0036] According to this embodiment, preferably, an upper throttle plate 7 is provided at the upper end of the guide flow tube bundle 8, and a lower throttle plate 10 is provided at the lower end. Multiple honeycomb-shaped openings are provided on the upper throttle plate 7 and the lower throttle plate 10, and the positions of the openings correspond to the openings of the spiral pipes on the guide flow tube bundle 8.

[0037] According to this embodiment, preferably, sound-absorbing material is filled between the guide flow tube bundle 8 and the inner wall of the valve body 12.

[0038] Preferably, the sound-absorbing material is aluminum foam 9.

[0039] According to this embodiment, preferably, a second rectifying device is further included; the second rectifying device is located in the flow channel between the valve inlet 3 and the first rectifying device; the second rectifying device includes a valve rod extension section 5, a valve rod sleeve 16, flow channel positioning vanes 6, flow channel dividing vanes 15, a flow channel space upper cover 14, and a flow channel space bottom plate 18; the upper part of the valve rod extension section 5 is connected to the lower part of the valve rod 1 in the valve body 12, the flow channel space upper cover 14 is arranged above the valve rod sleeve 16, and the flow channel space bottom plate 18 is arranged below the valve rod sleeve 16. The flow channel space upper cover 14 and the flow channel space bottom plate 18 are installed on the inner wall of the valve body 12. The flow channel space bottom plate 18 is located above the guide tube bundle 8. A flow channel dividing vane 15 is arranged in the flow channel between the flow channel space upper cover 14 and the flow channel space bottom plate 18; preferably, the upper part of the flow channel dividing vane 15 is fixedly connected to the flow channel space upper cover 14, and the lower part is fixedly connected to the flow channel space bottom plate 18; the lower part of the valve rod extension section 5 passes through the circular ring in the middle of the flow channel space upper cover 14 and is connected to the valve rod sleeve 16. Arc-shaped flow channel positioning vanes 6 are evenly arranged on the circumference of the valve rod sleeve 16. Each flow channel positioning vane 6 is located in the steam delivery flow channel formed between adjacent arc-shaped flow channel dividing vanes 15; sealing vanes are evenly distributed on the outer circumference of the circular ring of the flow channel space upper cover 14. The sealing vanes have the same shape as the flow channel positioning vanes 6. The flow channel space bottom plate 18 is provided with the same sealing vanes as the flow channel space upper cover 14. The sealing vanes on the flow channel space upper cover 14 are located above the steam delivery flow channel, and the sealing vanes on the flow channel space bottom plate 18 are located below the steam delivery flow channel; the valve rod extension section 5 drives the valve rod sleeve 16 to rotate, driving the flow channel positioning vanes 6 to move in the steam delivery flow channel to adjust the opening and size of the steam delivery flow channel.

[0040] Preferably, symmetrically arranged gears 17 are provided at the lower part of the valve rod extension section 5, and internal gears 161 are provided on the inner wall of the valve rod sleeve 16. The gears 17 are meshed with the internal gears 161.

[0041] Preferably, a sealing ring is provided between the valve rod extension section 5 and the circular ring in the middle of the flow channel space upper cover 14.

[0042] According to this embodiment, preferably, a third rectifying device is further included; the third rectifying device includes a conical valve core 2 and an inlet throttle plate 13. The conical valve core 2 is arranged on the valve rod 1 in the valve body 12, and the inlet throttle plate 13 is provided at the valve inlet 3. The conical valve core 2 can be attached to the inlet throttle plate 13.

[0043] Preferably, the middle part of the conical valve core 2 is in a raised conical shape, and the surface attached to the inlet throttle plate 13 is smooth.

[0044] The valve rod 1 is installed in the valve body 12, and the valve rod 1 controls the opening and closing of the valve through the conical valve core 2 at the lower part.

[0045] The conical valve core 2 fits tightly against the inlet throttle plate 13. When the conical valve core 2 is fully closed, it blocks all the plate holes of the inlet throttle plate 13. At this time, no high-temperature steam passes through the valve. As the conical valve core 2 moves upward, the plate holes of the inlet throttle plate 13 blocked by the conical valve core 2 gradually leak out, and high-temperature steam can enter the valve cavity flow channel of the valve body 12 through the inlet throttle plate 13. Thus, the flow rate of high-temperature steam can be controlled, and the inlet throttle plate 13 can play a role in rectifying the high-temperature steam. Preferably, the middle of the conical valve core 2 is a smooth and raised conical shape. This structure can prevent the formation of eddy currents of high-temperature steam in the valve core cavity, reduce the noise generated by high-temperature steam and the erosion of the valve core, and improve the service life of the valve core.

[0046] As Figure 2 shown, according to this embodiment, preferably, the flow guide tube bundle 8 is composed of seven spiral pipes. The seven spiral pipes are wound together from top to bottom and gradually disperse from being close to each other. Both ends can be fixed by the upper throttle plate 7 and the lower throttle plate 10. The high-temperature steam is divided into seven bundles by the flow guide tube bundle 8 and makes a centripetal movement in the spiral pipes of the flow guide tube bundle 8, increasing the speed of the high-temperature steam and reducing the pressure, rectifying the high-temperature steam, standardizing the flow state of the high-temperature steam, making the flow state of the high-temperature steam more stable, and avoiding the erosion of the inner wall of the valve body 12 by the high-temperature steam. In the space except the flow guide tube bundle 8 between the upper throttle plate 7 and the lower throttle plate 10, sound-absorbing materials are selected to fill the remaining space. Preferably, it is filled with the aluminum foam 9. The aluminum foam 9 has air bubbles in the aluminum matrix and absorbs the noise generated by the high-temperature steam during movement through the vibration of the pore walls, and can also play a role in supporting and fixing the seven spiral pipes of the flow guide tube bundle 8, avoiding the vibration or displacement of the flow guide tube bundle 8.

[0047] According to this embodiment, preferably, the lower part of the valve stem extension section 5 is inserted into the middle hole in the middle of the valve stem sleeve 16. The valve stem sleeve 16 plays a role in restricting the valve stem extension section 5, avoiding the erosion of high-temperature steam and causing the valve stem extension section 5 to deviate from the axis direction.

[0048] According to this embodiment, preferably, the upper throttle plate 7 and the lower throttle plate 10 can not only play a role in fixing the flow guide tube bundle 8, but also better restrict the flow state of the high-temperature steam, reduce the pressure of the high-temperature steam, and reduce the noise generated by the high-temperature steam by setting a double-layer throttle plate.

[0049] As Figure 3 shown, according to this embodiment, preferably, the upper throttle plate 7 and the lower throttle plate 10 are provided with openings at the corresponding positions of the flow guide tube bundle 8. The openings are honeycomb-shaped and play a role in rectification.

[0050] As Figure 4As shown, according to this embodiment, preferably, the upper cover 14 of the flow channel space and the bottom chassis 18 of the flow channel space are installed below the conical valve core 2. Except that the middle of the upper cover 14 of the flow channel space is an open ring and the middle of the bottom chassis 18 of the flow channel space is sealed, the shapes and sizes of the upper cover 14 of the flow channel space and the bottom chassis 18 of the flow channel space are the same; when the flow channel positioning blade 6 rotates to directly below the upper cover 14 of the flow channel space and the bottom chassis 18 of the flow channel space and overlaps with them, the valve is fully opened; when the flow channel positioning blade 6 rotates to a position complementary to the upper cover 14 of the flow channel space and the bottom chassis 18 of the flow channel space, the inner wall of the flow channel dividing blade 15 fits tightly with the inner wall of the flow channel positioning blade 6, completely closing the steam delivery flow channel.

[0051] As Figure 5 shown, preferably, the flow channel dividing blade 15 is a thin-walled structure. The compartment between every two adjacent flow channel dividing blades 15 allows the flow channel positioning blade 6 to move therein. When the valve is fully closed, it can seal the steam delivery flow channel, completely closing the steam delivery flow channel, and adjusting the opening and closing and size of the valve. If there is internal leakage in the valve, it can act as a second protective measure and play a sealing role. This design allows high-temperature steam to flow in a smaller flow channel when the flow rate is small, improving the flow state of the high-temperature steam in the valve body 12, with better rectification effect, and thus greatly reducing the flow-induced noise.

[0052] According to this embodiment, preferably, the flow channel wall of the steam delivery flow channel formed by the flow channel dividing blade 15 and the flow channel positioning blade 6 is an arc-shaped curved surface, which can further improve the stability of the high-temperature steam flow state.

[0053] According to this embodiment, preferably, the upper part of the valve stem extension section 5 is fixedly connected to the conical valve core 2, such as by welding, with high strength to avoid loosening.

[0054] As Figure 6 shown, according to this embodiment, preferably, the inner wall of the valve stem sleeve 16 is provided with an internal gear 161, which meshes with two small gears 17 symmetrically arranged on the lower part of the valve stem extension section 5. The flow channel positioning blade 6 can rotate along with the valve stem sleeve 16 when the valve stem extension section 5 rotates and lifts, forming a steam delivery flow channel with the flow channel dividing blade 15, and controlling the opening and closing of the steam delivery flow channel along with the movement of the valve stem extension section 5. By setting different numbers of teeth for the internal gear 161 and the small gears 17, different transmission ratios are set to achieve the purpose of dynamic response that when the valve is fully closed, the steam delivery flow channel is completely closed, and when the valve is fully opened, the steam delivery flow channel is completely opened accordingly.

[0055] The working process of the present invention:

[0056] The present invention uses a conical valve core 2 to control the flow rate of high-temperature steam and rectify the high-temperature steam. Since the conical valve core 2 is in a smooth conical shape with a middle bulge, it can prevent the formation of eddy currents of high-temperature steam in the valve core cavity, reduce the noise generated by the high-temperature steam and the erosion of the valve core. The present invention also provides arc-shaped flow path positioning vanes 6 and flow path dividing vanes 15. The flow path positioning vanes 6 can move up and down with the extension section 5 of the valve stem for rotational movement, and control the opening and closing of the steam delivery flow path according to the opening of the valve, avoiding the generation of large flow-induced noise when the valve opening is small, and can also provide secondary protection in case of valve leakage. The guide tube bundle 8 is composed of multiple spiral pipes rotating and winding around each other, dividing the high-temperature steam into multiple bundles, and making a centripetal movement in the spiral pipes of the guide tube bundle 8, increasing the speed of the high-temperature steam and reducing the pressure, rectifying the high-temperature steam, standardizing the flow pattern of the high-temperature steam, making the flow pattern of the high-temperature steam more stable, avoiding the erosion of the inner wall of the valve body 12 by the high-temperature steam, reducing the damage to the inner wall of the steam delivery pipeline inside the valve, playing a very good role in the stable operation of the entire steam delivery pipeline system, extending the service life of the valve, reducing the invasion and damage of the noise to the staff working beside the high-temperature steam delivery pipeline, and greatly improving the working environment of the staff working beside the steam delivery pipeline equipment. It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments understandable to those skilled in the art.

[0057] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-noise high-temperature steam pressure reducing valve, characterized in that, it includes a valve body (12) and a first rectifying device; the first rectifying device is installed in the flow channel of the valve body (12), and the first rectifying device includes a guide tube bundle (8), and the guide tube bundle (8) includes a plurality of spiral pipes. The plurality of spiral pipes are wound around each other from top to bottom to form a twist-shaped guide tube bundle (8). The upper end of the spiral pipe communicates with the flow channel of the valve inlet (3), and the lower end of the spiral pipe communicates with the valve outlet (19); it further includes a second rectifying device; the second rectifying device is located in the flow channel between the valve inlet (3) and the first rectifying device; the second rectifying device includes a valve rod extension section (5), a valve rod sleeve (16), a flow channel positioning blade (6), a flow channel dividing blade (15), a flow channel space upper cover (14) and a flow channel space chassis (18); the upper part of the valve rod extension section (5) is connected to the lower part of the valve rod (1) in the valve body (12), the upper surface of the valve rod sleeve (16) is provided with a flow channel space upper cover (14), and the lower surface is provided with a flow channel space chassis (18). The flow channel space upper cover (14) and the flow channel space chassis (18) are installed on the inner wall of the valve body (12). The flow channel space chassis (18) is located above the guide tube bundle (8). A flow channel dividing blade (15) is provided in the flow channel between the flow channel space upper cover (14) and the flow channel space chassis (18); the lower part of the valve rod extension section (5) passes through the ring in the middle of the flow channel space upper cover (14) and is connected to the valve rod sleeve (16). Arc-shaped flow channel positioning blades (6) are evenly arranged on the circumference of the valve rod sleeve (16), and each flow channel positioning blade (6) is located in the steam delivery flow channel formed between adjacent arc-shaped flow channel dividing blades (15); the outer circumference of the ring of the flow channel space upper cover (14) is evenly provided with sealing blades, and the sealing blades are the same shape as the flow channel positioning blades (6). The flow channel space chassis (18) is provided with the same sealing blades as the flow channel space upper cover (14). The sealing blades on the flow channel space upper cover (14) are located above the steam delivery flow channel, and the sealing blades on the flow channel space chassis (18) are located below the steam delivery flow channel.

2. The low-noise high-temperature steam pressure reducing valve according to claim 1, characterized in that, the upper parts of the plurality of spiral pipes of the guide tube bundle (8) are in contact with each other and gradually disperse from top to bottom.

3. The low-noise high-temperature steam pressure reducing valve according to claim 1, characterized in that, an upper throttle plate (7) is provided at the upper end of the guide tube bundle (8), and a lower throttle plate (10) is provided at the lower end; a plurality of honeycomb-shaped openings are provided on the upper throttle plate (7) and the lower throttle plate (10), and the positions of the openings correspond to the openings of the spiral pipes on the guide tube bundle (8).

4. The low-noise high-temperature steam pressure reducing valve according to claim 1, characterized in that, sound-absorbing material is filled between the guide tube bundle (8) and the inner wall of the valve body (12).

5. The low-noise high-temperature steam pressure reducing valve according to claim 4, characterized in that, the sound-absorbing material is aluminum foam (9).

6. The low-noise high-temperature steam pressure reducing valve according to claim 1, characterized in that, A gear (17) is provided at the lower part of the extended section (5) of the valve stem, and an internal gear (161) is provided on the inner wall of the valve stem sleeve (16). The gear (17) meshes with the internal gear (161).

7. The low-noise high-temperature steam pressure reducing valve according to claim 1, characterized in that a sealing ring is provided between the extended section (5) of the valve stem and the circular ring in the middle of the upper cover (14) of the flow passage space.

8. The low-noise high-temperature steam pressure reducing valve according to any one of claims 1-7, characterized in that it further comprises a third rectifying device; the third rectifying device includes a conical valve core (2) and an inlet throttle plate (13). The conical valve core (2) is arranged on the valve stem (1) in the valve body (12), and the inlet throttle plate (13) is provided at the valve inlet (3). The conical valve core (2) can be attached to the inlet throttle plate (13).

9. The low-noise high-temperature steam pressure reducing valve according to claim 8, characterized in that the middle part of the conical valve core (2) is in a raised conical shape, and the surface attached to the inlet throttle plate (13) is smooth.

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