Noise reducing pressure matching device

Abstract

The utility model relates to a kind of noise reduction type pressure matchers, including high-pressure steam chamber and pressure matcher shell, high-pressure steam chamber and pressure matcher shell are separately provided with support leg on it, the support leg below is provided with support plate, support plate is provided with protective cover, the protective cover adopts the box-like structure of bottom opening, which is composed of first shell and second shell, heat insulation layer is arranged in the protective cover outside high-pressure steam chamber, pressure matcher shell and support leg, heat insulation layer uses rock wool or asbestos, buckle is arranged on first shell and second shell, damping mechanism is arranged on support plate, the damping mechanism includes wing plate, dowel, gasket, first rubber disc spring and second rubber disc spring. The noise generated in the working process of pressure matcher can be reduced. The utility model is convenient to use, and has wide market prospect.

Description

Technical Field

[0001] This utility model relates to the field of pressure matching equipment, specifically to a noise-reducing pressure matching device. Background Technology

[0002] The application of jet technology in steam turbine pressure matching devices allows for the direct mixing of high-pressure, high-temperature fluids with low-pressure, low-temperature fluids, offering unique advantages. Firstly, it increases the thermal power generation of the steam turbine; secondly, it transforms non-adjustable steam extraction into adjustable steam extraction. The basic theoretical research on jet technology was largely completed in the 1960s, and its application in industrial practice began gradually, primarily in vacuum systems. Its use as a thermal compressor is a relatively recent development, occurring only in the last 20 years. In steam power systems, jet technology offers unique advantages for thermal compression. Although jet compression involves the direct mixing of high-pressure, high-temperature fluids with low-pressure, low-temperature fluids, increasing irreversible losses, its advantages over mechanical compressors include simpler structure, lower cost, and less maintenance. Furthermore, its thermal energy utilization rate is comparable to, and in some cases, even higher than, that of mechanical compressors. Especially when used in conjunction with heating steam turbines as a pressure matching device, it has achieved considerable efficiency and a promising market prospect.

[0003] The pressure matching device mixes high-pressure and low-pressure steam streams by delivering high-pressure steam to the high-pressure chamber, throttling it through nozzles in the high-pressure chamber, and then delivering it to the low-pressure chamber where it mixes with the low-pressure steam to obtain steam at a suitable pressure, which is then delivered to the turbine unit. The high-pressure and low-pressure steam, after mixing, are transported through a steam delivery pipe. During this process, the high-pressure and low-pressure steam undergo thorough mixing and pressure reduction within the steam delivery pipe to form matched steam. Because the steam delivery pipe of the pressure matching device uses a Venturi tube design (including a contraction section, a throat section, and an expansion section), significant noise is generated during the transport of the high-pressure and low-pressure steam within the pipe. Analysis shows that this noise originates from two parts: the first part comes from the vibration generated during steam mixing, and the second part comes from the vibration of the pressure matching device itself. Excessive noise can cause serious noise pollution. Therefore, there is room for improvement in the existing technology to reduce noise pollution generated during the operation of the pressure matching device and provide a more comfortable and quieter working environment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a noise-reducing pressure matcher that can reduce the noise generated during the operation of the pressure matcher, thereby overcoming the deficiencies in existing technologies.

[0005] The technical solution adopted by this utility model is as follows: a noise-reducing pressure matching device, including a high-pressure steam chamber and a pressure matching device housing. Both the high-pressure steam chamber and the pressure matching device housing are respectively provided with support legs. A support plate is provided below each support leg, and a protective cover is provided on the support plate. The protective cover adopts a box-shaped structure with an open bottom, consisting of a first housing hinged to the support plate and a second housing hinged to the support plate. A heat insulation layer is provided inside the protective cover on the outside of the high-pressure steam chamber, the pressure matching device housing, and the support legs. The heat insulation layer is made of rock wool or asbestos. Fasteners are provided on the first and second housings. Several shock-absorbing mechanisms are provided on the support plate. Each shock-absorbing mechanism includes a wing plate on the support plate, a pin on the wing plate, a washer on the pin above the wing plate, a first rubber disc spring on the pin between the washer and the wing plate, and a second rubber disc spring on the pin below the wing plate.

[0006] Preferably, the protective cover has a first clamping hole at the end near the high-pressure steam chamber, a high-pressure steam conveying pipe is provided on the high-pressure steam chamber, a second clamping hole is provided on the protective cover outside the high-pressure steam conveying pipe, and a third clamping hole is provided at the end of the protective cover near the pressure matching device housing. The first clamping hole, the second clamping hole, and the third clamping hole are all circular hole structures formed by a first clamping groove on the first housing and a second clamping groove on the second housing, respectively. A first rubber strip is provided in both the first clamping groove and the second clamping groove, and the first rubber strip has an arc-shaped strip structure.

[0007] Preferably, a nozzle is provided on one end of the high-pressure steam chamber near the pressure matching device housing. The number of nozzles is several, and each nozzle is provided with a mixing steam pipe. Each mixing steam pipe is provided with a corresponding low-pressure steam pipe. Each mixing steam pipe and the pressure matching device housing are provided with a steam delivery pipe. The steam delivery pipe includes a contraction pipe, a throat pipe and an expansion pipe in sequence along the direction from near the mixing steam pipe to away from the mixing steam pipe. A first connecting ring is provided on the several steam delivery pipes and is connected to the pressure matching device housing. A flow rectifier plate is provided in the pressure matching device housing on the side of the several steam delivery pipes away from the high-pressure steam chamber.

[0008] Preferably, the protective cover is provided with a connecting groove, the connecting groove is provided with a connecting plate, the connecting plate is provided with a fourth clamping hole, the number of the fourth clamping holes corresponds to the number of the low-pressure steam pipes, and several low-pressure steam pipes are installed one-to-one on several fourth clamping holes. A first rubber ring gasket is provided between the connecting plate and the connecting groove. The connecting plate includes a rectangular plate structure composed of a first clamping plate and a second clamping plate. A first bolt is provided on the first clamping plate and the protective cover, as well as on the second clamping plate and the protective cover. The fourth clamping hole adopts a circular hole structure composed of a third clamping groove opened on the first clamping plate and a fourth clamping groove opened on the second clamping plate. A second rubber strip is provided in both the third clamping groove and the fourth clamping groove. The second rubber strip adopts an arc-shaped strip structure.

[0009] Preferably, each nozzle is provided with a first valve stem, several first valve stems are provided with connecting discs, an end cap is provided at the end of the high-pressure steam chamber away from the pressure matching device housing, a second valve stem is provided on the end cap and the connecting disc, a second bolt is provided on the end cap and the high-pressure steam chamber, and a second rubber ring gasket is provided between the end cap and the high-pressure steam chamber.

[0010] Preferably, the end cap is provided with a sealing groove, which is located on the outside of the second valve stem. The central axis of the sealing groove and the central axis of the second valve stem are on the same axis. A sealing packing is provided on the second valve stem inside the sealing groove. A sealing sleeve is provided on the second valve stem outside the sealing packing. A second connecting ring is provided on the end of the sealing sleeve away from the sealing packing. A third bolt is provided on the second connecting ring and the end cap. The number of third bolts is several, and the several third bolts are evenly distributed in a star shape on the outside of the second valve stem. Each third bolt on the side of the second connecting ring away from the sealing sleeve is provided with an adjusting nut.

[0011] The beneficial effects of this utility model are as follows: By installing several of the aforementioned shock-absorbing mechanisms on the support plate, this utility model reduces the noise generated by vibration during the operation of the pressure matching device, while the noise generated by pressure changes in the steam transported in the steam conveying pipe is partially absorbed by the heat insulation layer; thus reducing the noise generated during the operation of the pressure matching device, and because the heat insulation layer uses rock wool or asbestos, it can reduce heat transmission and reduce the heat received by the protective cover, thereby lowering the temperature of the protective cover and improving safety in use.

[0012] This utility model has a simple structure, is easy to operate, and has a clever design, which greatly improves work efficiency and has good social and economic benefits. It is a product that is easy to promote and use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 for Figure 1 A magnified view of detail A.

[0015] Figure 3 This is a schematic diagram of the structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of this utility model.

[0017] Figure 5 for Figure 4 A magnified view of detail B.

[0018] Figure 6 for Figure 4 A magnified view of detail C. Detailed Implementation

[0019] like Figures 1 to 6 As shown, a noise-reducing pressure matching device includes a high-pressure steam chamber 1 and a pressure matching device housing 2. Both the high-pressure steam chamber 1 and the pressure matching device housing 2 are respectively provided with support legs 3. A support plate 4 is provided below each support leg 3. A fourth bolt is provided on both the support leg 3 and the support plate 4. A protective cover is provided on the support plate 4. The protective cover is a box-shaped structure with an open bottom, consisting of a first housing 5 hinged to the support plate 4 and a second housing 6 hinged to the support plate 4. The high-pressure steam chamber 1, the pressure matching device housing 2, and the support legs 3 are also described. The outer protective cover is equipped with a heat insulation layer 7, which is made of rock wool or asbestos. Fasteners 8 are provided on the first shell 5 and the second shell 6. Several shock-absorbing mechanisms are provided on the support plate 4. Each shock-absorbing mechanism includes a wing plate 9 on the support plate 4, a pin 10 on the wing plate 9, a washer 11 on the pin 10 above the wing plate 9, a first rubber disc spring 12 on the pin 10 between the washer 11 and the wing plate 9, and a second rubber disc spring 13 on the pin 10 below the wing plate 9. A through hole is provided on the wing plate 9, the diameter of which is larger than the diameter of the pin 10. During installation, the support plate 4 is fixed to a preset position using the corresponding pins 10 in the shock-absorbing mechanisms, and the first rubber disc spring 12 and the second rubber disc spring 13 are both in a preset compressed state under the action of the mounting surface, the corresponding pins 10, and the washer 11. This allows the vibration wave to be transmitted to the corresponding first rubber disc spring 12 and second rubber disc spring 13 in several damping mechanisms when the support plate 4 is subjected to vibration.

[0020] To improve the stability of this product and reduce its vibration, a first clamping hole 14 is provided on the end of the protective cover near the high-pressure steam chamber 1. A high-pressure steam delivery pipe 15 is provided on the high-pressure steam delivery pipe 15. A second clamping hole 16 is provided on the protective cover outside the high-pressure steam delivery pipe 15. A third clamping hole 17 is provided on the end of the protective cover near the pressure matching device housing 2. The first clamping hole 14, the second clamping hole 16, and the third clamping hole 17 are all circular hole structures composed of a first clamping groove on the first housing 5 and a second clamping groove on the second housing 6. A first rubber strip 18 is provided in both the first and second clamping grooves. The first rubber strip 18 is an arc-shaped strip structure made of high-temperature resistant rubber. Installing the first rubber strip 18 in the first clamping hole 14, the second clamping hole 16, and the third clamping hole 17 facilitates the clamping stability of the high-pressure steam chamber 1, the high-pressure steam delivery pipe 15, and the pressure matching device housing 2.

[0021] A nozzle 19 is provided on one end of the high-pressure steam chamber 1 near the pressure matching device housing 2. Several nozzles 19 are provided, each with a mixing steam pipe 20. Each mixing steam pipe 20 is connected to a corresponding low-pressure steam pipe 21. Steam delivery pipes 22 are provided on both the mixing steam pipe 20 and the pressure matching device housing 2. Each steam delivery pipe 22 includes a contraction pipe, a throat, and an expansion pipe sequentially along the direction from near to away from the mixing steam pipe 20. A first connecting ring 23 is provided on each of the steam delivery pipes 22, connecting to the pressure matching device housing 2. A flow rectifier plate 24 is provided inside the pressure matching device housing 2 on the side of the steam delivery pipes 22 away from the high-pressure steam chamber 1. The flow rectifier plate 24 facilitates the rectification of the steam flow delivered through the steam delivery pipes 22, thereby reducing turbulence carried in the steam flow delivered through the pressure matching device housing 2 at the end away from the high-pressure steam chamber 1.

[0022] Furthermore, to further improve the stability of this product during operation, the protective cover is provided with a connecting groove 25, and a connecting plate is provided on the connecting groove 25. The connecting plate is provided with a fourth clamping hole 26, the number of the fourth clamping holes 26 corresponding to the number of the low-pressure steam pipes 21. Several low-pressure steam pipes 21 are installed one-to-one on several fourth clamping holes 26. A first rubber ring gasket 27 is provided between the connecting plate and the connecting groove 25. The connecting plate includes a rectangular plate structure composed of a first clamping plate 28 and a second clamping plate 29. A first bolt 30 is provided on the first clamping plate 28 and the protective cover, as well as on the second clamping plate 29 and the protective cover. The fourth clamping hole 26 adopts a circular hole structure composed of a third clamping groove on the first clamping plate 28 and a fourth clamping groove on the second clamping plate 29. A second rubber strip 31 is provided in both the third clamping groove and the fourth clamping groove. The second rubber strip 31 adopts an arc-shaped strip structure made of high-temperature resistant rubber. The fourth clamping hole 26 and the corresponding second rubber strip 31 are used to clamp several low-pressure steam pipes 21, which reduces the noise emitted by the protective cover due to the vibration and collision of several low-pressure steam pipes 21, and also reduces the amplitude of the vibration of several low-pressure steam pipes 21.

[0023] Each nozzle 19 is provided with a first valve stem 32, and several first valve stems 32 are provided with connecting discs 33. An end cap 34 is provided on the end of the high-pressure steam chamber 1 away from the pressure matching device housing 2. A second valve stem 35 is provided on the end cap 34 and the connecting disc 33. A second bolt 36 is provided on the end cap 34 and the high-pressure steam chamber 1. A second rubber ring gasket 37 is provided between the end cap 34 and the high-pressure steam chamber 1. The installation of the second rubber ring gasket 37 facilitates the reduction of the gap between the end cap 34 and the high-pressure steam chamber 1. A valve stem guide sleeve is provided on the nozzle 19 and the first valve stem 32. The second valve stem 35 is driven by a drive mechanism; the end cap 34 is provided with a sealing groove 38, which is located outside the second valve stem 35. The central axis of the sealing groove 38 and the central axis of the second valve stem 35 are on the same axis. The second valve stem 35 inside the sealing groove 38 is provided with a sealing packing 39, which is a ring structure made of woven graphite. Installing the sealing packing 39 facilitates reducing the gap between the second valve stem 35 and the end cap 34. A sealing sleeve 40 is provided on the second valve stem 35 outside the sealing packing 39. A second connecting ring 41 is provided on the end of the sealing sleeve 40 away from the sealing packing 39. A third bolt 42 is provided on the second connecting ring 41 and the end cap 34. The number of third bolts 42 is several, and the several third bolts 42 are evenly distributed in a star shape on the outside of the second valve stem 35. Each third bolt 42 on the side of the second connecting ring 41 away from the sealing sleeve 40 is provided with an adjusting nut 43.

[0024] The usage instructions for this product are as follows: Figures 1 to 6 As shown, firstly, the second valve stem 35 is moved, which in turn moves the connecting plate 33, thereby causing several first valve stems 32 to move accordingly, thus adjusting the gap between the first valve stems 32 and the corresponding nozzles 19. Then, high-pressure steam is transported to the high-pressure steam chamber 1 through the high-pressure steam delivery pipe 15. The high-pressure steam is divided into several portions, and each portion of high-pressure steam is transported to the adjacent mixing steam pipe 20 through the corresponding nozzle 19 to form throttling steam. At the same time, several mixing steam pipes 20 receive low-pressure steam from the corresponding low-pressure steam pipe 21. Each portion of low-pressure steam and the corresponding throttling steam are mixed and transported to the steam delivery pipe 22. After being mixed by the steam delivery pipe 22, a first mixed steam is formed and transported to the pressure matching device housing 2 through the end of the steam delivery pipe 22 away from the mixing steam pipe 20. After the several first mixed steams are mixed, a second mixed steam is formed, which is rectified by the rectifier orifice plate 24 and then transported to the downstream pipeline through the end of the pressure matching device housing 2 away from the high-pressure steam chamber 1.

[0025] During this period, the vibration generated by the steam conveying pipe 22 causes nearby parts to vibrate, and finally the vibration is transmitted to the support plate 4. The vibration is buffered by several damping mechanisms on the support plate 4. The first rubber disc spring 12 and the second rubber disc spring 13 in the damping mechanism receive and buffer the vibration waves transmitted from the support plate 4. The noise generated by the steam conveying pipe 22 due to pressure changes is partially absorbed by the insulation layer 7.

[0026] In this embodiment, by installing several of the aforementioned shock-absorbing mechanisms on the support plate 4, the noise generated by vibration during the operation of the pressure matcher is reduced. Meanwhile, the noise generated by pressure changes in the steam transported in the steam conveying pipe 22 is partially absorbed by the heat insulation layer 7. This reduces the noise generated during the operation of the pressure matcher. Furthermore, since the heat insulation layer 7 is made of rock wool or asbestos, it can reduce heat transfer and reduce the heat received by the protective cover, thereby lowering the temperature of the protective cover and improving safety in use.

[0027] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A noise-reducing pressure matching device, comprising a high-pressure steam chamber (1) and a pressure matching device housing (2), wherein both the high-pressure steam chamber (1) and the pressure matching device housing (2) are respectively provided with support legs (3), characterized in that: A support plate (4) is provided below the outrigger (3), and a protective cover is provided on the support plate (4). The protective cover is a box-shaped structure with an open bottom, consisting of a first shell (5) hinged to the support plate (4) and a second shell (6) hinged to the support plate (4). A heat insulation layer (7) is provided inside the protective cover outside the high-pressure steam chamber (1), the pressure matching device shell (2), and the outrigger (3). The heat insulation layer (7) is made of rock wool or asbestos. The first shell (5) and the second shell (6) The upper part is provided with a buckle (8), and the support plate (4) is provided with a number of shock-absorbing mechanisms. Each shock-absorbing mechanism includes a wing plate (9) provided on the support plate (4), a pin (10) provided on the wing plate (9), a washer (11) provided on the pin (10) above the wing plate (9), a first rubber disc spring (12) provided on the pin (10) between the washer (11) and the wing plate (9), and a second rubber disc spring (13) provided on the pin (10) below the wing plate (9).

2. The noise-reducing pressure matching device according to claim 1, characterized in that: The protective cover is provided with a first clamping hole (14) at one end near the high-pressure steam chamber (1), a high-pressure steam conveying pipe (15) is provided on the high-pressure steam chamber (1), a second clamping hole (16) is provided on the protective cover outside the high-pressure steam conveying pipe (15), and a third clamping hole (17) is provided at one end of the protective cover near the pressure matching device housing (2). The first clamping hole (14), the second clamping hole (16) and the third clamping hole (17) are all circular hole-shaped structures composed of a first clamping groove opened on the first housing (5) and a second clamping groove opened on the second housing (6). A first rubber strip (18) is provided in the first clamping groove and the second clamping groove respectively. The first rubber strip (18) is an arc-shaped strip structure.

3. The noise-reducing pressure matching device according to claim 1, characterized in that: The high-pressure steam chamber (1) is provided with a nozzle (19) at one end near the pressure matching device housing (2). There are several nozzles (19), and each nozzle (19) is provided with a mixing steam pipe (20). Each mixing steam pipe (20) is provided with a low-pressure steam pipe (21). Each mixing steam pipe (20) and the pressure matching device housing (2) are provided with a steam delivery pipe (22). The steam delivery pipe (22) includes a contraction pipe, a throat pipe and an expansion pipe in sequence along the direction from near the mixing steam pipe (20) to away from the mixing steam pipe (20). A first connecting ring (23) is provided on several steam delivery pipes (22). The first connecting ring (23) is connected to the pressure matching device housing (2). A rectifier orifice plate (24) is provided in the pressure matching device housing (2) on the side of several steam delivery pipes (22) away from the high-pressure steam chamber (1).

4. The noise-reducing pressure matching device according to claim 3, characterized in that: The protective cover is provided with a connecting groove (25), and a connecting plate is provided on the connecting groove (25). The connecting plate is provided with a fourth clamping hole (26). The number of fourth clamping holes (26) corresponds to the number of low-pressure steam pipes (21). Several low-pressure steam pipes (21) are installed one-to-one on several fourth clamping holes (26). A first rubber ring gasket (27) is provided between the connecting plate and the connecting groove (25). The connecting plate includes a first clamping plate (28) and a second clamping plate (29). The rectangular plate structure is composed of a first bolt (30) on the first clamping plate (28) and the protective cover, and a fourth clamping hole (26) on the second clamping plate (29) and the protective cover. The fourth clamping hole (26) is a circular hole structure composed of a third clamping groove on the first clamping plate (28) and a fourth clamping groove on the second clamping plate (29). The third clamping groove and the fourth clamping groove are each filled with a second rubber strip (31). The second rubber strip (31) is an arc-shaped strip structure.

5. The noise-reducing pressure matching device according to claim 3, characterized in that: Each of the nozzles (19) is provided with a first valve stem (32), and a connecting plate (33) is provided on several first valve stems (32). An end cap (34) is provided on the end of the high-pressure steam chamber (1) away from the pressure matching device housing (2). A second valve stem (35) is provided on the end cap (34) and the connecting plate (33). A second bolt (36) is provided on the end cap (34) and the high-pressure steam chamber (1). A second rubber ring gasket (37) is provided between the end cap (34) and the high-pressure steam chamber (1).

6. The noise-reducing pressure matching device according to claim 5, characterized in that: The end cap (34) is provided with a sealing groove (38), which is located outside the second valve stem (35). The central axis of the sealing groove (38) and the central axis of the second valve stem (35) are on the same axis. The second valve stem (35) in the sealing groove (38) is provided with a sealing packing (39). A sealing sleeve (40) is provided on the second valve stem (35) outside the sealing packing (39). A second connecting ring (41) is provided on the end of the sealing sleeve (40) away from the sealing packing (39). A third bolt (42) is provided on the second connecting ring (41) and the end cap (34). The number of third bolts (42) is several. The several third bolts (42) are evenly distributed in a star shape on the outside of the second valve stem (35). Each third bolt (42) on the side of the second connecting ring (41) away from the sealing sleeve (40) is provided with an adjusting nut (43).

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