Tail gas noise reduction device and engineering machinery

Abstract

The invention relates to the technical field of noise reduction equipment, and discloses a tail gas noise reduction device and engineering machinery, the tail gas noise reduction device comprises a first box body and a second box body, the first end of the first box body is open, a plurality of first silencing plates are arranged in the first box body at intervals, and a gas inlet is formed in the part, away from the first end of the first box body, of the first box body; the first end of the second box body is open, a plurality of second silencing plates are arranged in the second box body at intervals, the first end of the second box body is in sliding sleeve connection with the first end of the first box body, the first silencing plates and the second silencing plates are sequentially and alternately arranged and can relatively slide, and an exhaust port is formed in the portion, away from the first box body, of the second box body; and the noise reduction capability of the noise reduction device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of noise reduction equipment, and in particular to an exhaust noise reduction device and engineering machinery. Background Art

[0002] In related technologies, high-power engineering machinery will emit very noisy exhaust gas during operation. For example, when the power of a fracturing pump needs to be increased to 8000W or higher, a gas turbine needs to be used as a power source. The gas turbine makes a lot of noise when working and the exhaust temperature is high. The high-noise exhaust gas needs to be discharged into a noise reduction device, and the high-temperature and high-noise exhaust gas needs to be treated and discharged into the atmosphere to avoid environmental impact on on-site workers and nearby residents.

[0003] However, the noise reduction capability of the noise reduction device is limited and cannot meet the noise reduction demand. Summary of the Invention

[0004] The present application provides an exhaust noise reduction device and engineering machinery to improve the noise reduction capability of the noise reduction device.

[0005] On the one hand, the present application provides an exhaust noise reduction device, including a first box body and a second box body, and the specific solution is as follows.

[0006] The first end of the first box is open, and a plurality of first sound-absorbing plates are arranged at intervals inside the first box. The first box has an air inlet at a position away from the first end of the first box. The first end of the second box is open, and a plurality of second sound-absorbing plates are arranged at intervals inside the second box. The first end of the second box is slidably connected to the first end of the first box, and the plurality of first sound-absorbing plates and the plurality of second sound-absorbing plates are alternately arranged in sequence and can slide relative to each other. The second box has an exhaust port at a position away from the first box.

[0007] Beneficial effect: by arranging multiple first silencer plates at intervals in the first box body, and arranging multiple second silencer plates at intervals in the second box body, the first end of the second box body is slidably connected with the first end of the second box body, and the multiple first silencer plates and the multiple second silencer plates are alternately arranged in sequence and can slide relative to each other. Therefore, by controlling the relative position of the second box body and the first box body, the length of the first silencer plates and the second silencer plates along the sliding direction of the second box body can be controlled to adjust the length of the silencer channel, thereby improving the silencer effect on the exhaust noise and meeting the noise reduction requirements.

[0008] In an optional embodiment, the first sound-absorbing plate includes a first heat-resistant porous layer, a first heat-resistant sound-absorbing layer, and a second heat-resistant porous layer arranged in sequence; and / or, the second sound-absorbing plate includes a third heat-resistant porous layer, a second heat-resistant sound-absorbing layer, and a fourth heat-resistant porous layer arranged in sequence.

[0009] In an optional embodiment, the first end of the second box body is slidably mounted on the outside of the first end of the first box body, and the end of the second sound-absorbing plate away from the first box body is connected to the inner side wall of the second box body.

[0010] In an optional embodiment, the second box body is slidably connected to the first box body along the height direction of the first box body.

[0011] In an optional embodiment, the outer surface of the first sound-absorbing plate is provided with a plurality of first recessed portions; and / or the outer surface of the second sound-absorbing plate is provided with a plurality of second recessed portions.

[0012] In an optional embodiment, at least one guide member is provided on both sides of the second sound-absorbing plate, and the guide member is at least partially located in the first box body and connected to the inner wall surface of the first box body.

[0013] In an optional embodiment, the distance between the guide members on both sides of the second silencer plate and the second silencer plate gradually increases in the direction approaching the second box body; and / or, the end of the first silencer plate close to the second box body is contracted; and / or, the end of the second silencer plate close to the first box body is contracted.

[0014] In an optional embodiment, a telescopic drive assembly is further included, and the telescopic end of the telescopic drive assembly is connected to the second box.

[0015] In an optional embodiment, the telescopic drive assembly includes two telescopic components, and the two telescopic components are located on both sides of the first box;

[0016] The telescopic component includes a first slide rail, a second slide rail, a first support rod, a second support rod and a telescoping device, the first slide rail is arranged on the first box body, the second slide rail is arranged on the second box body, the first end of the first support rod is hinged to the first box body, the second end of the first support rod is slidably connected to the second slide rail, the first end of the second support rod is hinged to the second box body, the second end of the second support rod is slidably connected to the first slide rail, the middle part of the first support rod is hinged to the middle part of the second support rod, and the two ends of the telescoping device are hinged to the first support rod and the second support rod respectively, and the hinge axis of the first support rod and the second support rod is arranged in a non-planar manner with the axis of the telescoping device.

[0017] On the other hand, the present application also provides an engineering machinery comprising the exhaust noise reduction device in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of this application or the technical solutions in related technologies, the following is a brief introduction to the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is an axonometric view of an exhaust noise reduction device according to an embodiment of the present application;

[0020] Figure 2 This is an isometric view of an exhaust noise reduction device from another perspective according to an embodiment of the present application;

[0021] Figure 3 This is a right side view of an exhaust noise reduction device according to an embodiment of the present application;

[0022] Figure 4 for Figure 3 Cross-sectional view at AA in the middle;

[0023] Figure 5 This is an isometric view of an exhaust noise reduction device in a noise reduction state according to an embodiment of the present application;

[0024] Figure 6 This is a right side view of an exhaust noise reduction device according to an embodiment of the present application in a noise reduction state;

[0025] Figure 7 for Figure 6 Cross-sectional view at the middle BB;

[0026] Figure 8 This is a front view of an exhaust noise reduction device in a noise reduction state according to an embodiment of the present application;

[0027] Figure 9 for Figure 8 Cross-sectional view at CC;

[0028] Figure 10 This is a schematic structural diagram of the first muffler plate in an exhaust noise reduction device according to an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1. First box; 2. Second box; 3. Guide member; 4. Telescopic drive assembly;

[0031] 11. First muffler plate; 12. Air inlet; 21. Second muffler plate; 22. Exhaust port;

[0032] 111. First heat-resistant porous layer; 112. First heat-resistant sound-absorbing layer; 113. Second heat-resistant porous layer;

[0033] 41. Telescopic component; 411. First slide rail; 412. Second slide rail; 413. First support rod; 414. Second support rod; 415. Telescopic device. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0035] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application. The terms "mounted", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two elements. The terms "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, where the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes both absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism may be, for example, within 5°; "perpendicular" includes both absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity may also be, for example, within 5°. "Equal" includes both absolute equality and approximate equality, where the acceptable deviation range for approximate equality may be, for example, that the difference between the two is less than or equal to 5% of either. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] In related technologies, high-power engineering machinery will emit very noisy exhaust gas during operation. For example, when the power of a fracturing pump needs to be increased to 8000W or higher, a gas turbine needs to be used as a power source. The gas turbine makes a lot of noise when working and the exhaust temperature is high. The high-noise exhaust gas needs to be discharged into a noise reduction device, and the high-temperature and high-noise exhaust gas needs to be treated and discharged into the atmosphere to avoid environmental impact on on-site workers and nearby residents.

[0037] However, the noise reduction capability of the noise reduction device is limited and cannot meet the noise reduction demand.

[0038] In order to solve the above technical problems, the present application provides an exhaust noise reduction device and engineering machinery to improve the noise reduction capability of the noise reduction device.

[0039] The following combination Figures 1 to 10 , describing the embodiments of the present application.

[0040] According to an embodiment of the present application, on the one hand, an exhaust noise reduction device is provided, such as Figures 1 to 4 As shown, it includes a first box body 1 and a second box body 2, and the specific solution is as follows.

[0041] The first box body 1 is a high-temperature resistant metal box body. Specifically, the outer surface of the first box body 1 is a carbon steel plate, the inner surface is a stainless steel plate, and the middle is an insulation layer, such as an aluminum silicate wool layer wrapped with high-silica cloth, etc. The thickness of the insulation layer is 85 mm. The first box body 1 with this structure can ensure that when the input exhaust gas temperature of the first box body 1 is 600°C and the external ambient temperature is 30°C, the outer surface temperature of the first box body 1 is 75°C to 95°C; the shape of the first box body 1 can be any shape such as a rectangular parallelepiped and a cylinder.

[0042] like Figure 4 As shown, the first end of the first box body 1 is open, and a plurality of first sound-absorbing panels 11 are arranged at intervals in the first box body 1. Specifically, the first sound-absorbing panels 11 are fixed in the first box body 1 by heat-insulating nails. Specifically, the first sound-absorbing panels 11 are fixedly connected to the inner wall surface of the first box body 1 through the two ends; the first sound-absorbing panels 11 are high-temperature resistant panels. In a specific solution, the interior of the first sound-absorbing panels 11 is filled with high-temperature resistant sound-absorbing materials, such as stainless steel fiber felt, titanium alloy porous material, metal foam and porous ceramics, etc. Figure 2 As shown, the first housing 1 has an air inlet 12 at a location away from the first end of the first housing 1 , which is used to communicate with the exhaust outlet of the engineering machinery to input high-temperature and noisy exhaust gas into the first housing 1 .

[0043] Specifically, such as Figure 4As shown, a connected dispersion zone and silencer zone are provided in the first box body 1, the air inlet 12 is connected to the dispersion chamber, the first silencer plate 11 is provided in the silencer zone, and the high-temperature noise exhaust gas enters the dispersion zone through the air inlet 12 and enters the silencer zone after being evenly distributed.

[0044] The second box body 2 is a high-temperature resistant metal box body. Specifically, the outer surface of the second box body 2 is a carbon steel plate, the inner surface is a stainless steel plate, and the middle is an insulation layer, such as an aluminum silicate wool layer wrapped with high-silica cloth, etc. The thickness of the insulation layer is 85 mm. The second box body 2 with this structure can ensure that when the input exhaust gas temperature of the second box body 2 is 600°C and the external ambient temperature is 30°C, the outer surface temperature of the second box body 2 is 75°C to 95°C; the shape of the second box body 2 can be any shape such as a rectangular parallelepiped, a cylinder, etc., and its shape is adapted to the first box body 1 for easy sliding connection.

[0045] like Figure 4 As shown, the first end of the second box body 2 is set to be open, and a plurality of second sound-absorbing plates 21 are arranged at intervals in the second box body 2. Specifically, the second sound-absorbing plates 21 are fixed in the second box body 2 by insulation nails. The second sound-absorbing plates 21 are high-temperature resistant plates. In a specific solution, the interior of the second sound-absorbing plates 21 is filled with high-temperature resistant sound-absorbing materials, such as stainless steel fiber felt, titanium alloy porous material, metal foam and porous ceramics; the first end of the second box body 2 is slidably connected to the first end of the first box body 1, and a plurality of first sound-absorbing plates 11 and a plurality of second sound-absorbing plates 21 are alternately arranged in sequence and can slide relative to each other. The second box body 2 has an exhaust port 22 at a position away from the first box body 1 for discharging the exhaust gas after noise reduction by the first sound-absorbing plates 11 and the second sound-absorbing plates 21.

[0046] Specifically, the first end of the second housing 2 is slidably coupled to the first end of the first housing 1. Alternatively, the first end of the second housing 2 is slidably coupled to the exterior of the first end of the first housing 1, or the first end of the first housing 1 is slidably coupled to the exterior of the first end of the second housing 2. A sliding seal is implemented at the slidably coupled portion of the first housing 1 and the second housing 2, such as by providing a high-temperature resistant seal between the first housing 1 and the second housing 2, to prevent exhaust gas leakage.

[0047] It should be noted that the sliding connection direction between the first box body 1 and the second box body 2 can be in any direction, such as along the height direction of the first box body 1, or in any direction parallel to the horizontal plane.

[0048] When not in use, Figure 3 and Figure 4 As shown, the second box body 2 and the first box body 1 are at least partially overlapped along the sliding sleeve direction (at this time, the first sound-absorbing plate 11 and the second sound-absorbing plate 21 are at least partially overlapped), which can reduce the volume and facilitate transportation and handling.

[0049] In use (i.e. in silenced state), if Figures 5 to 7 As shown, the second box body 2 slides relative to the first box body 1, and the overlapping length of the first muffler plate 11 and the second muffler plate 21 is reduced, or does not overlap at all, thereby lengthening the length of the muffler channel.

[0050] Specifically, after the second box body 2 slides relative to the first box body 1, the relative setting of the second box body 2 and the first box body 1 can be fixed by a snap-fit component (such as a locking pin hole is provided on the first box body 1, and a locking pin is provided on the second box body 2. The locking pin can enter the locking pin hole after the second box body 2 slides to a specified position relative to the first box body 1. Of course, the position can also be locked by other means).

[0051] In this embodiment, Figures 1 to 7 As shown, by arranging multiple first silencer plates 11 at intervals in the first box body 1, and arranging multiple second silencer plates 21 at intervals in the second box body 2, the first end of the second box body 2 is slidably connected with the first end of the second box body 2, and the multiple first silencer plates 11 and the multiple second silencer plates 21 are alternately arranged in sequence and can slide relative to each other. Therefore, by controlling the relative position of the second box body 2 and the first box body 1, the length of the first silencer plates 11 and the second silencer plates 21 along the sliding direction of the second box body 2 can be controlled to adjust the length of the silencer channel, thereby improving the silencer effect on the exhaust noise and meeting the noise reduction requirements.

[0052] In one embodiment, Figure 10 As shown, the first sound-absorbing plate 11 includes a first heat-resistant porous layer 111, a first heat-resistant sound-absorbing layer 112 and a second heat-resistant porous layer 113 arranged in sequence; specifically, the first heat-resistant porous layer 111 and the second heat-resistant porous layer 113 are stainless steel orifice plates, and the first heat-resistant sound-absorbing layer 112 is a heat-resistant sound-absorbing filler layer, specifically, an aluminum silicate wool layer wrapped with high silica cloth; the second sound-absorbing plate 21 includes a third heat-resistant porous layer, a second heat-resistant sound-absorbing layer and a fourth heat-resistant porous layer arranged in sequence, specifically, the third heat-resistant porous layer and the fourth heat-resistant porous layer are stainless steel orifice plates, and the second heat-resistant sound-absorbing layer is a heat-resistant sound-absorbing filler layer, specifically, an aluminum silicate wool layer wrapped with high silica cloth.

[0053] It should be noted that, if the temperature inside the first box body 1 and the second box body 2 is 600°C, the expansion coefficient of the stainless steel orifice plate is 13.6. By calculation (the calculation method is the existing technology and will not be described in detail here), the expansion amount of the stainless steel orifice plate is 16 mm. An appropriate gap or expansion amount can be reserved at the connection part between the first silencer plate 11 and the first box body 1, and an appropriate gap or expansion amount can be reserved at the connection part between the second silencer plate 21 and the second box body 2. One of the specific structures is: taking the first silencer plate 11 as an example, a plug pin is provided at the connection part between the first silencer plate 11 and the first box body 1, and a pin hole is provided on the first box body 1 to adapt to the plug pin. The cross-section of the pin hole is a proportional enlarged hole of the plug pin cross-section. The enlargement ratio can be set according to actual conditions. The cross-section of the pin hole can be square, circular or other arbitrary shapes. Of course, the cross-section of the plug pin is adapted to the profile of the pin hole.

[0054] In this embodiment, Figure 10 As shown, a first heat-resistant porous layer 111 and a second heat-resistant porous layer 113 are arranged on both sides of the first heat-resistant sound-absorbing layer 112, and a third heat-resistant porous layer and a fourth heat-resistant porous layer are arranged on both sides of the third heat-resistant sound-absorbing layer. The first heat-resistant porous layer 111 or the second heat-resistant control layer can be fixed to prevent deformation, and at the same time, it can facilitate the contact between noise and the first sound-absorbing layer or the second sound-absorbing layer.

[0055] In one embodiment, Figures 1 to 4 As shown, the first end of the second box body 2 is slidably sleeved on the outside of the first end of the first box body 1, and the end of the second sound-absorbing plate 21 away from the first box body 1 is connected to the inner wall of the second box body 2. Specifically, a roller is provided inside the first end of the second box body 2 to make sliding contact with the first box body 1, or a roller is provided outside the first end of the first box body 1 to make sliding contact with the inner wall surface of the second box body 2.

[0056] like Figure 8 and Figure 9 As shown, the end of the second sound-absorbing plate 21 away from the first box body 1 is connected to the inner wall of the second box body 2, that is, the second sound-absorbing plate 21 is away from the end of the first box body 1, and is connected to the second box body 2 on both sides along the width direction of the second sound-absorbing plate 21, and the other parts of the second sound-absorbing plate 21 along its width direction are spaced apart from the inner wall surface of the second box body 2.

[0057] During specific use, when the second box body 2 is slid and pulled relative to the first box body 1, the parts of the second sound-absorbing plate 21 on both sides along its width direction that are not in contact with the second box body 2 are at least partially located inside the first box body 1, and can be spaced apart from the first box body 1 or in sliding contact.

[0058] In this embodiment, Figure 8 and Figure 9As shown, the first end of the second box body 2 is slidably mounted on the outside of the first end of the first box body 1, and the end of the second sound-absorbing plate 21 away from the first box body 1 is connected to the inner wall of the second box body 2. The structure is simple and easy to manufacture.

[0059] In one embodiment, Figure 1 As shown, the second box body 2 is connected to the first box body 1 by sliding along the height direction of the first box body 1, that is, the second box body 2 slides along the height direction of the first box body 1, that is, the length of the silencer channel formed by the first box body 1 and the second box body 2 is extended along the height direction of the first box body 1.

[0060] In this embodiment, the second box body 2 is slidably connected to the first box body 1 along the height direction of the first box body 1. The operation of sliding the second box body 2 along the height direction of the first box body 1 is simple and does not require ground treatment. At the same time, it can reduce the height of the exhaust noise reduction device and improve the vehicle's passability.

[0061] In one embodiment, the outer surface of the first silencer plate 11 is provided with a plurality of first recessed portions; the outer surface of the second silencer plate 21 is provided with a plurality of second recessed portions. Specifically, the first recessed portions and the second recessed portions are in an overall concave arc shape, and their specific profile is wavy.

[0062] During specific use, after the high-temperature exhaust gas enters the exhaust noise reduction device, in the process of passing through multiple first silencer plates 11 and multiple second silencer plates 21 in sequence, due to the presence of the first recessed portion and the second recessed portion, the noise of the high-temperature exhaust gas can be changed to contact the first silencer plate 11 and the second silencer plate 21 at different angles, thereby improving the noise reduction effect.

[0063] In this embodiment, by providing multiple first recessed portions on the outer surface of the first sound-absorbing plate 11 and multiple second recessed portions on the outer surface of the second sound-absorbing plate 21, noise can enter the sound-absorbing plate at various angles, thereby improving the noise reduction effect.

[0064] In one embodiment, Figure 4 and Figure 7 As shown, at least one guide member 3 is provided on both sides of the second silencer plate 21. The guide member 3 is at least partially located in the first box body 1 and is connected to the inner wall surface of the first box body 1. Specifically, the guide member 3 is a guide plate. The guide member 3 can be arranged in pairs and respectively located on both sides of the second silencer plate 21 to guide the second silencer plate 21 to avoid frictional contact between the second silencer plate 21 and the second silencer plate 21, thereby improving the service life of the exhaust noise reduction device.

[0065] In one embodiment, Figure 7As shown, the distance between the guide members 3 on both sides of the second silencer plate 21 and the second silencer plate 21 gradually increases in the direction approaching the second box body 2; this can avoid the second silencer plate 21 being stuck and the second box body 2 being unable to slide back and forth due to the small gap between the second silencer plate 21 and the guide members 3, which causes the second silencer plate 21 to interfere with the guide members 3 during the reciprocating sliding of the second silencer plate 21, thereby preventing the second silencer plate 21 from being stuck and the second box body 2 from being able to slide back and forth, affecting the installation of the equipment.

[0066] like Figure 7 As shown, the end of the first silencer 11 close to the second box body 2 is in a contracted shape; the end of the second silencer 21 close to the first box body 1 is in a contracted shape. Specifically, the end of the first silencer 11 close to the second box body 2 is in an arc shape, a triangle with rounded corners, a trapezoid with rounded corners, etc., preferably a semicircular shape; the end of the second silencer 21 close to the first box body 1 is in an arc shape, a triangle with rounded corners, a trapezoid with rounded corners, etc., preferably a triangle with rounded corners.

[0067] In the specific use process, such as Figure 7 As shown, when the second box body 2 slides to the silencer state relative to the first box body 1, the end of the first silencer plate 11 close to the second box body 2 overlaps with the end of the second silencer plate 21 close to the first box body 1. Since the end of the first silencer plate 11 close to the second box body 2 is in a contracted shape; the end of the second silencer plate 21 close to the first box body 1 is in a contracted shape, thereby forming a spacing channel between the first silencer plate 11 and the second silencer plate 21, which can facilitate the passage of high-temperature exhaust gas.

[0068] In this embodiment, Figure 4 and Figure 7 As shown, the end of the first muffler plate 11 close to the second box body 2 is in a contracted shape; the end of the second muffler plate 21 close to the first box body 1 is in a contracted shape, thereby forming a spacing channel between the first muffler plate 11 and the second muffler plate 21, which can facilitate the passage of high-temperature exhaust gas, improve the passability of high-temperature exhaust gas, and reduce noise and vibration of the exhaust noise reduction device.

[0069] In one embodiment, Figure 8 As shown, the exhaust noise reduction device also includes a telescopic drive component 4, the telescopic end of the telescopic drive component 4 is connected to the second box body 2. Specifically, the telescopic drive component 4 can be in various forms. The setting of the telescopic active component can realize the automatic movement of the second box body 2, improve the automation of the exhaust noise reduction device, and reduce the workload of the staff.

[0070] In one embodiment, Figure 8 As shown, the telescopic drive assembly includes two telescopic components 41 , and the two telescopic components 41 are located on both sides of the first box body 1 . Specifically, the two telescopic components 41 can be located on both sides of the first box body 1 in any direction.

[0071] like Figure 8 As shown, the telescopic component 41 includes a first slide rail 411, a second slide rail 412, a first support rod 413, a second support rod 414 and a telescoping device 415. The first slide rail 411 and the second slide rail 412 are both channel steels, that is, steels with a U-shaped cross-section; the first slide rail 411 is arranged on the first box body 1 by welding or bolting, and the second slide rail 412 is arranged on the second box body 2 by welding or bolting. The first end of the first support rod 413 is hinged to the first box body 1 by a hinge or a rotating shaft, and the second end of the first support rod 413 is slidingly connected to the second slide rail 412. Specifically, an oblong hole is provided on the second slide rail 412 along the sliding direction of the second end of the first support rod 413, so as to be slidably matched with the sliding shaft provided on the second end of the first support rod 413.

[0072] like Figure 8 As shown, the first end of the second support rod 414 is hinged to the second box body 2 by a hinge or a rotating shaft, and the second end of the second support rod 414 is slidingly connected to the first slide rail 411. Specifically, an oblong hole is provided on the first slide rail 411 along the sliding direction of the second end of the second support rod 414 to be slidingly matched with the sliding shaft provided on the second end of the second support rod 414; the middle part of the first support rod 413 and the middle part of the second support rod 414 are hinged to the rotating shaft, and the two ends of the telescope 415 are respectively hinged to the first support rod 413 and the second support rod 414 by the rotating shaft, and the hinge axis of the first support rod 413 and the second support rod 414 is arranged in a non-planar manner with the axis of the telescope 415.

[0073] Specifically, the telescopic device 415 is a telescopic cylinder or a telescopic cylinder.

[0074] It should be noted that the hinge axis of the first support rod 413 and the second support rod 414 is not arranged in the same plane as the axis of the telescopic device 415, which means that the hinge axis of the first support rod 413 and the second support rod 414 is staggered with the axis of the telescopic device 415 and the two do not intersect.

[0075] In this embodiment, the extension of the telescoping member 415 can drive the change in the angle between the first support rod 413 and the second support rod 414 to change the height of the second box body 2 , thereby achieving a simple structure and good stability.

[0076] In one embodiment, an exhaust noise reduction device is provided, such as Figures 1 to 4 As shown, it includes a first box body 1 and a second box body 2, and the specific solution is as follows.

[0077] The first box body 1 is a high-temperature resistant metal box body. Specifically, the outer surface of the first box body 1 is a carbon steel plate, the inner surface is a stainless steel plate, and the middle is an insulation layer, such as an aluminum silicate wool layer wrapped with high-silica cloth, etc. The thickness of the insulation layer is 85 mm. The first box body 1 with this structure can ensure that when the input exhaust gas temperature of the first box body 1 is 600°C and the external ambient temperature is 30°C, the outer surface temperature of the first box body 1 is 75°C to 95°C; the shape of the first box body 1 can be any shape such as a rectangular parallelepiped and a cylinder.

[0078] like Figure 4 As shown, the first end of the first box body 1 is open, and a plurality of first sound-absorbing panels 11 are arranged at intervals in the first box body 1. Specifically, the first sound-absorbing panels 11 are fixed in the first box body 1 by heat-insulating nails. Specifically, the first sound-absorbing panels 11 are fixedly connected to the inner wall surface of the first box body 1 through the two ends; the first sound-absorbing panels 11 are high-temperature resistant panels. In a specific solution, the interior of the first sound-absorbing panels 11 is filled with high-temperature resistant sound-absorbing materials, such as stainless steel fiber felt, titanium alloy porous material, metal foam and porous ceramics, etc. Figure 2 As shown, the first housing 1 has an air inlet 12 at a location away from the first end of the first housing 1 , which is used to communicate with the exhaust outlet of the engineering machinery to input high-temperature and noisy exhaust gas into the first housing 1 .

[0079] Specifically, such as Figure 4 As shown, a connected dispersion zone and silencer zone are provided in the first box body 1, the air inlet 12 is connected to the dispersion chamber, the first silencer plate 11 is provided in the silencer zone, and the high-temperature noise exhaust gas enters the dispersion zone through the air inlet 12 and enters the silencer zone after being evenly distributed.

[0080] The second box body 2 is a high-temperature resistant metal box body. Specifically, the outer surface of the second box body 2 is a carbon steel plate, the inner surface is a stainless steel plate, and the middle is an insulation layer, such as an aluminum silicate wool layer wrapped with high-silica cloth, etc. The thickness of the insulation layer is 85 mm. The second box body 2 with this structure can ensure that when the input exhaust gas temperature of the second box body 2 is 600°C and the external ambient temperature is 30°C, the outer surface temperature of the second box body 2 is 75°C to 95°C; the shape of the second box body 2 can be any shape such as a rectangular parallelepiped, a cylinder, etc., and its shape is adapted to the first box body 1 for easy sliding connection.

[0081] like Figure 4As shown, the first end of the second box body 2 is set to be open, and a plurality of second sound-absorbing plates 21 are arranged at intervals in the second box body 2. Specifically, the second sound-absorbing plates 21 are fixed in the second box body 2 by insulation nails. The second sound-absorbing plates 21 are high-temperature resistant plates. In a specific solution, the interior of the second sound-absorbing plates 21 is filled with high-temperature resistant sound-absorbing materials, such as stainless steel fiber felt, titanium alloy porous material, metal foam and porous ceramics; the first end of the second box body 2 is slidably connected to the first end of the first box body 1, and a plurality of first sound-absorbing plates 11 and a plurality of second sound-absorbing plates 21 are alternately arranged in sequence and can slide relative to each other. The second box body 2 has an exhaust port 22 at a position away from the first box body 1 for discharging the exhaust gas after noise reduction by the first sound-absorbing plates 11 and the second sound-absorbing plates 21.

[0082] Specifically, the first end of the second housing 2 is slidably coupled to the first end of the first housing 1. Alternatively, the first end of the second housing 2 is slidably coupled to the exterior of the first end of the first housing 1, or the first end of the first housing 1 is slidably coupled to the exterior of the first end of the second housing 2. A sliding seal is implemented at the slidably coupled portion of the first housing 1 and the second housing 2, such as by providing a high-temperature resistant seal between the first housing 1 and the second housing 2, to prevent exhaust gas leakage.

[0083] More specifically, Figure 10 As shown, the first sound-absorbing plate 11 includes a first heat-resistant porous layer 111, a first heat-resistant sound-absorbing layer 112 and a second heat-resistant porous layer 113 arranged in sequence; specifically, the first heat-resistant porous layer 111 and the second heat-resistant porous layer 113 are stainless steel orifice plates, and more specifically, stainless steel 304 wire mesh; the first heat-resistant sound-absorbing layer 112 is a heat-resistant sound-absorbing filler layer, specifically, an aluminum silicate wool layer wrapped with high silica cloth; the second sound-absorbing plate 21 includes a third heat-resistant porous layer, a second heat-resistant sound-absorbing layer and a fourth heat-resistant porous layer arranged in sequence, specifically, the third heat-resistant porous layer and the fourth heat-resistant porous layer are stainless steel orifice plates, and the second heat-resistant sound-absorbing layer is a heat-resistant sound-absorbing filler layer, specifically, an aluminum silicate wool layer wrapped with high silica cloth.

[0084] It should be noted that, if the temperature inside the first box body 1 and the second box body 2 is 600°C, the expansion coefficient of the stainless steel orifice plate is 13.6. By calculation (the calculation method is the existing technology and will not be described in detail here), the expansion amount of the stainless steel orifice plate is 16 mm. An appropriate gap or expansion amount can be reserved at the connection part between the first silencer plate 11 and the first box body 1, and an appropriate gap or expansion amount can be reserved at the connection part between the second silencer plate 21 and the second box body 2. One of the specific structures is: taking the first silencer plate 11 as an example, a plug pin is provided at the connection part between the first silencer plate 11 and the first box body 1, and a pin hole is provided on the first box body 1 to adapt to the plug pin. The cross-section of the pin hole is a proportional enlarged hole of the plug pin cross-section. The enlargement ratio can be set according to actual conditions. The cross-section of the pin hole can be square, circular or other arbitrary shapes. Of course, the cross-section of the plug pin is adapted to the profile of the pin hole.

[0085] More specifically, Figures 1 to 4 As shown, the first end of the second box body 2 is slidably sleeved on the outside of the first end of the first box body 1, and the end of the second sound-absorbing plate 21 away from the first box body 1 is connected to the inner wall of the second box body 2. Specifically, a roller is provided inside the first end of the second box body 2 to make sliding contact with the first box body 1, or a roller is provided outside the first end of the first box body 1 to make sliding contact with the inner wall surface of the second box body 2.

[0086] like Figure 8 and Figure 9 As shown, the end of the second sound-absorbing plate 21 away from the first box body 1 is connected to the inner wall of the second box body 2, that is, the second sound-absorbing plate 21 is away from the end of the first box body 1, and is connected to the second box body 2 on both sides along the width direction of the second sound-absorbing plate 21, and the other parts of the second sound-absorbing plate 21 along its width direction are spaced apart from the inner wall surface of the second box body 2.

[0087] More specifically, Figure 1 As shown, the second box body 2 is connected to the first box body 1 by sliding along the height direction of the first box body 1, that is, the second box body 2 slides along the height direction of the first box body 1, that is, the length of the silencer channel formed by the first box body 1 and the second box body 2 is extended along the height direction of the first box body 1.

[0088] More specifically, Figure 4 and Figure 7 As shown, at least one guide member 3 is provided on both sides of the second silencer plate 21. The guide member 3 is at least partially located in the first box body 1 and is connected to the inner wall surface of the first box body 1. Specifically, the guide member 3 is a guide plate. The guide member 3 can be arranged in pairs and respectively located on both sides of the second silencer plate 21 to guide the second silencer plate 21 to avoid frictional contact between the second silencer plate 21 and the second silencer plate 21, thereby improving the service life of the exhaust noise reduction device.

[0089] More specifically, Figure 7 As shown, the distance between the guide members 3 on both sides of the second silencer plate 21 and the second silencer plate 21 gradually increases in the direction approaching the second box body 2; this can avoid the second silencer plate 21 being stuck and the second box body 2 being unable to slide back and forth due to the small gap between the second silencer plate 21 and the guide members 3, which causes the second silencer plate 21 to interfere with the guide members 3 during the reciprocating sliding of the second silencer plate 21, thereby preventing the second silencer plate 21 from being stuck and the second box body 2 from being able to slide back and forth, affecting the installation of the equipment.

[0090] like Figure 7 As shown, the end of the first silencer 11 close to the second box body 2 is in a contracted shape; the end of the second silencer 21 close to the first box body 1 is in a contracted shape. Specifically, the end of the first silencer 11 close to the second box body 2 is in an arc shape, a triangle with rounded corners, a trapezoid with rounded corners, etc., preferably a semicircular shape; the end of the second silencer 21 close to the first box body 1 is in an arc shape, a triangle with rounded corners, a trapezoid with rounded corners, etc., preferably a triangle with rounded corners.

[0091] More specifically, Figure 8 As shown, the exhaust noise reduction device also includes a telescopic drive component 4, the telescopic end of the telescopic drive component 4 is connected to the second box body 2. Specifically, the telescopic drive component 4 can be in various forms. The setting of the telescopic active component can realize the automatic movement of the second box body 2, improve the automation of the exhaust noise reduction device, and reduce the workload of the staff.

[0092] More specifically, Figure 8 As shown, the telescopic drive assembly includes two telescopic components 41 , and the two telescopic components 41 are located on both sides of the first box body 1 . Specifically, the two telescopic components 41 can be located on both sides of the first box body 1 in any direction.

[0093] like Figure 8 As shown, the telescopic component 41 includes a first slide rail 411, a second slide rail 412, a first support rod 413, a second support rod 414 and a telescoping device 415. The first slide rail 411 and the second slide rail 412 are both channel steels, that is, steels with a U-shaped cross-section; the first slide rail 411 is arranged on the first box body 1 by welding or bolting, and the second slide rail 412 is arranged on the second box body 2 by welding or bolting. The first end of the first support rod 413 is hinged to the first box body 1 by a hinge or a rotating shaft, and the second end of the first support rod 413 is slidingly connected to the second slide rail 412. Specifically, an oblong hole is provided on the second slide rail 412 along the sliding direction of the second end of the first support rod 413, so as to be slidably matched with the sliding shaft provided on the second end of the first support rod 413.

[0094] like Figure 8As shown, the first end of the second support rod 414 is hinged to the second box body 2 by a hinge or a rotating shaft, and the second end of the second support rod 414 is slidingly connected to the first slide rail 411. Specifically, an oblong hole is provided on the first slide rail 411 along the sliding direction of the second end of the second support rod 414 to be slidingly matched with the sliding shaft provided on the second end of the second support rod 414; the middle part of the first support rod 413 and the middle part of the second support rod 414 are hinged to the rotating shaft, and the two ends of the telescope 415 are respectively hinged to the first support rod 413 and the second support rod 414 by the rotating shaft, and the hinge axis of the first support rod 413 and the second support rod 414 is arranged in a non-planar manner with the axis of the telescope 415.

[0095] Specifically, the telescopic device 415 is a telescopic cylinder or a telescopic cylinder.

[0096] It should be noted that the hinge axis of the first support rod 413 and the second support rod 414 is not arranged in the same plane as the axis of the telescopic device 415, which means that the hinge axis of the first support rod 413 and the second support rod 414 is staggered with the axis of the telescopic device 415 and the two do not intersect.

[0097] The exhaust noise reduction device is designed based on the exhaust flow rate of 30kg / s of the gas turbine and the high temperature exhaust density of 0.404kg / m 3 The calculated exhaust flow rate is 38m / s. The noise value actually measured by the equipment on the gas turbine test bench is 118dB(A).

[0098] The insulation nails are made of 304 stainless steel. The total mass of the second housing 2 and its internal components is approximately 662 kg. The exhaust duct formed by the first and second housings 1 and 2 is a two-stage structure with rectangular cross-sections. The internal flow cross-section of the exhaust duct in the first housing 1 is rectangular in size, measuring 1600 x 1220 mm; the internal flow cross-section of the exhaust duct in the second housing 2 is rectangular in size, measuring 1830 x 1450 mm. Both exhaust ducts are equipped with plate-type mufflers. A circular airflow channel is reserved at the front end of the lower exhaust duct for connection to the gas turbine exhaust expansion joint. The length of the first muffler plate 11 along the height of the first housing 1 is 1200 mm, and the length of the second muffler plate 21 along the height of the first housing 1 is 1145 mm.

[0099] The telescopic component 41 uses an H-shaped steel with a height of 150mm and a width of 100mm as the main structure of the first box body 1 and the second box body 2, and a channel steel with a width of 50mm and a height of 100mm (the first support rod 413 and the second support rod 414) is used as a movable diagonal brace to complete the lifting action. The two diagonal braces are fixed at the center point by a cylindrical pin, and the diagonal brace can rotate freely at the center point; one end of the diagonal brace is fixed, and a roller is installed at the other end, which reciprocates in a single direction in the guide rail made of C-shaped steel to prevent the diagonal brace from running off.

[0100] After calculation, the overall noise reduction capability of the muffler is about 20.7 decibels. When the comprehensive noise level of the gas turbine reaches 118 decibels, the noise of the exhaust port 22 can be controlled below 100 decibels by using this device.

[0101] The exhaust noise reduction device in this application has the following advantages.

[0102] (1) The noise reduction capability of the exhaust device is increased, and the noise reduction capability of the traditional single muffler is increased from about 10 decibels to 20 decibels, which significantly improves the environment at the work site.

[0103] (2) It can be automatically raised and lowered, and the height can be lowered to within the road transportation standard during transportation. During on-site work, the electric lifting system combined with the action of the hydraulic cylinder can lift the upper part of the muffler with one click to complete the preparation work before starting the gas turbine.

[0104] (3) The device itself has excellent thermal insulation performance, which can effectively isolate the high temperature of the gas turbine exhaust, preventing the outer surface temperature of the exhaust device from being too high, causing high temperature damage to operators and high temperature danger to nearby flammable materials.

[0105] (4) It has excellent corrosion resistance in open air environments. When the device itself is resistant to high temperatures, it has good tolerance to environmental corrosion. Whether it is high humidity and high salinity in coastal areas or strong wind and sand erosion in desert areas, it will not cause damage or failure to the structure of the device itself.

[0106] According to an embodiment of the present application, on the other hand, there is provided an engineering machine comprising the exhaust noise reduction device according to any one of the above embodiments.

[0107] Specifically, the engineering machinery may be equipment such as a fracturing pump that can emit high-temperature and high-noise exhaust gas.

[0108] In this embodiment, since the engineering machinery includes the exhaust noise reduction device, it has the same technical effect as the exhaust noise reduction device and will not be described in detail here.

[0109] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. An exhaust noise reduction device, characterized in that: include: A first box body (1), wherein the first end of the first box body (1) is open, a plurality of first sound-absorbing panels (11) are arranged at intervals in the first box body (1), and an air inlet (12) is provided at a portion of the first box body (1) away from the first end of the first box body (1); A second box (2), wherein the first end of the second box (2) is open, a plurality of second muffler plates (21) are arranged at intervals in the second box (2), the first end of the second box (2) is slidably sleeved with the first end of the first box (1), the plurality of first muffler plates (11) and the plurality of second muffler plates (21) are alternately arranged in sequence and are capable of sliding relative to each other, and an exhaust port (22) is provided at a portion of the second box (2) away from the first box (1).

2. The exhaust noise reduction device according to claim 1, characterized in that: The first sound-absorbing plate (11) comprises a first heat-resistant porous layer (111), a first heat-resistant sound-absorbing layer (112), and a second heat-resistant porous layer (113) arranged in sequence; And / or, the second sound-absorbing plate (21) comprises a third heat-resistant porous layer, a second heat-resistant sound-absorbing layer and a fourth heat-resistant porous layer arranged in sequence.

3. The exhaust noise reduction device according to claim 1, characterized in that: The first end of the second box (2) is slidably sleeved on the outside of the first end of the first box (1), and the end of the second muffler plate (21) away from the first box (1) is connected to the inner side wall of the second box (2).

4. The exhaust gas noise reduction device according to any one of claims 1 to 3, characterized in that: The second box body (2) is slidably connected to the first box body (1) along the height direction of the first box body (1).

5. The exhaust gas noise reduction device according to any one of claims 1 to 3, characterized in that: The outer surface of the first muffler plate (11) is provided with a plurality of first recessed portions; And / or, the outer surface of the second muffler plate (21) is provided with a plurality of second recessed portions.

6. The exhaust gas noise reduction device according to any one of claims 1 to 3, characterized in that: At least one guide member (3) is provided on both sides of the second muffler plate (21); the guide member (3) is at least partially located inside the first box body (1) and connected to the inner wall surface of the first box body (1).

7. The exhaust noise reduction device according to claim 6, characterized in that: The distance between the guide members (3) on both sides of the second muffler plate (21) and the second muffler plate (21) gradually increases in a direction approaching the second box body (2); And / or, the end portion of the first muffler plate (11) close to the second box (2) is in a contracted shape; And / or, the end portion of the second sound-absorbing plate (21) close to the first box body (1) is in a contracted shape.

8. The exhaust noise reduction device according to claim 1, characterized in that: It also includes a telescopic drive assembly (4), the telescopic end of the telescopic drive assembly (4) being connected to the second box body (2).

9. The exhaust noise reduction device according to claim 8, characterized in that: The telescopic drive assembly comprises two telescopic components (41), and the two telescopic components (41) are located on both sides of the first box (1); The telescopic component (41) comprises a first slide rail (411), a second slide rail (412), a first support rod (413), a second support rod (414) and a telescoping device (415), wherein the first slide rail (411) is arranged on the first box body (1), the second slide rail (412) is arranged on the second box body (2), the first end of the first support rod (413) is hinged to the first box body (1), the second end of the first support rod (413) is slidably connected to the second slide rail (412), and the second support rod ( The first end of the second support rod (414) is hinged to the second box body (2), the second end of the second support rod (414) is slidably connected to the first slide rail (411), the middle part of the first support rod (413) is hinged to the middle part of the second support rod (414), and the two ends of the telescopic device (415) are hinged to the first support rod (413) and the second support rod (414), respectively, and the hinge axis of the first support rod (413) and the second support rod (414) is arranged in a non-planar manner with the axis of the telescopic device (415).

10. An engineering machine, characterized in that: include: The exhaust noise reduction device according to any one of claims 1 to 9.

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