Exhaust spraying assembly, silencer and fracturing truck

Abstract

According to the exhaust spraying assembly, the silencer and the fracturing truck, an exhaust elbow is designed in a split mode, a first pipe body and a second pipe body form a bent channel, waste gas and spraying water flow form a mixed flow field in the second pipe body, the design of the acute angle alpha between a water spraying pipe and the second pipe body can enlarge the contact area of water mist and the waste gas, and the spraying effect is improved. The noise reduction effect is improved; meanwhile, a water outlet in the bottom of the first pipe body and a water discharging pipe are matched with an adjusting valve, controllable discharging of condensate water or redundant spraying water is achieved, and accumulated water is prevented from affecting the stability of the system; an acute angle is formed between the spraying direction of the water spraying pipe and the gas inlet direction of the second pipe body, water mist is diffused in the waste gas flowing direction according to the hydrodynamic principle, high-frequency components of exhaust noise are reduced, harmful substances in waste gas are reduced through particulate matter adsorption and cooling effects of the water mist, and the silencing effect is enhanced by prolonging the gas-liquid mixing time.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mufflers, in particular to an exhaust spray assembly, a muffler and a fracturing truck. BACKGROUND

[0002] During the combustion process of a diesel engine, the rapid change of pressure in the cylinder causes the vibration of components, generates high-frequency noise, and the combustion noise of the diesel engine is significantly higher than that of the gasoline engine. During the exhaust process, the high-speed airflow impacts the air to produce low-frequency booming sound. In order to prevent the diesel engine from producing exhaust noise and affecting the working environment of high-temperature smoke, an exhaust muffler is generally configured on the exhaust pipe of the diesel engine to reduce the exhaust noise of the diesel engine. If the performance of the muffler is insufficient, it will significantly amplify such noise.

[0003] In the related art, the traditional muffler can only play a simple noise reduction role, and cannot meet the actual use requirements. SUMMARY

[0004] The present application provides an exhaust spray assembly, a muffler and a fracturing truck, which can solve the technical problem that the traditional muffler can only play a simple noise reduction role and cannot meet the actual use requirements.

[0005] In a first aspect, the present application provides an exhaust spray assembly, comprising:

[0006] An exhaust elbow, comprising a first pipe body and a second pipe body, the top end of the first pipe body is an exhaust end, and the bottom end is provided with a drain port, the drain port is communicated with a drain pipe, the drain pipe is provided with an adjusting valve, one end of the second pipe body is communicated with the side wall of the first pipe body, and the other end is used to communicate with the exhaust end of a muffler body.

[0007] A water spray pipe, one end of the water spray pipe is communicated with the side wall of the second pipe body, and the other end is used to communicate with an external water supply pipeline, along the spraying direction of the water spray pipe and the air inlet direction of the second pipe body, the intersection angle a between the spraying direction of the water spray pipe and the second pipe body is an acute angle.

[0008] In combination with the first aspect, in an embodiment, one end of the water spray pipe located in the second pipe body is provided with a universal nozzle, and a telescopic assembly is connected between the universal nozzle and the inner side wall of the second pipe body.

[0009] The telescopic assembly is elongated to adjust the steering angle of the universal nozzle, so as to reduce the intersection angle a between the spraying direction of the water spray pipe and the second pipe body.

[0010] In combination with the first aspect, in an embodiment, the telescopic assembly comprises a memory alloy spring, and the memory alloy spring is connected between the universal nozzle and the inner side wall of the second pipe body.

[0011] When the temperature in the second pipe body exceeds the preset temperature value, the memory alloy spring is elongated to reduce the intersection angle a between the spray direction of the water spray pipe and the second pipe body.

[0012] In combination with the first aspect, in an embodiment, an outer wall of the second pipe body is wrapped with a double-layer cooling jacket, a phase change material is filled between the double-layer cooling jacket, a coolant supplement port is arranged at the top of the double-layer cooling jacket, and a heat dissipation fin tube is fixed at the bottom of the double-layer cooling jacket.

[0013] In combination with the first aspect, in an embodiment, a temperature sensor is arranged on an outer wall of the muffler body, and an electromagnetic valve is arranged on the water spray pipe.

[0014] The exhaust spray assembly further comprises a controller configured to control the electromagnetic valve to be started to connect the water spray pipe with an external water supply pipeline when the temperature sensor detects that the exhaust temperature exceeds a threshold value.

[0015] In combination with the first aspect, in an embodiment, the second pipe body is connected with a flange at an exhaust end of the muffler body, and a sealing gasket is arranged at the flange joint of the second pipe body.

[0016] In combination with the first aspect, in an embodiment, an inner wall surface of the exhaust elbow is coated with a corrosion-resistant coating.

[0017] In combination with the first aspect, in an embodiment, the corrosion-resistant coating comprises a tungsten carbide base layer, an aluminum oxide composite intermediate layer, and a fluorosilicon resin surface self-repairing layer.

[0018] In a second aspect, the embodiments of the present application provide a muffler, comprising:

[0019] a muffler body;

[0020] an exhaust elbow comprising a first pipe body and a second pipe body, a top end of the first pipe body being an exhaust end, and a bottom end of the first pipe body being provided with a drain port, the drain port being connected with a drain pipe, the drain pipe being provided with an adjusting valve, one end of the second pipe body being connected with a side wall of the first pipe body, and the other end of the second pipe body being connected with an exhaust end of the muffler body;

[0021] a water spray pipe, one end of the water spray pipe being connected with a side wall of the second pipe body, and the other end of the water spray pipe being configured to be connected with an external water supply pipeline, an intersection angle a between a spray direction of the water spray pipe and an air inlet direction of the second pipe body being an acute angle.

[0022] In a third aspect, the embodiments of the present application provide a fracturing truck, comprising the muffler as described above.

[0023] The technical scheme provided by the embodiments of the present application has the beneficial effects of:

[0024] The exhaust elbow is designed in a split type, the first pipe body and the second pipe body form a curved passage, so that the exhaust gas and the water flow form a mixed flow field in the second pipe body, wherein the acute angle alpha of the water spraying pipe and the second pipe body can enhance the contact area of the water mist and the exhaust gas, and improve the noise reduction effect; at the same time, the drain port at the bottom of the first pipe body and the drain pipe cooperate with the regulating valve to realize controllable discharge of the condensed water or excess spraying water, avoiding the influence of accumulated water on the stability of the system; the spraying direction of the water spraying pipe and the air inlet direction of the second pipe body form an acute angle, which utilizes the principle of fluid dynamics to diffuse the water mist along the flow direction of the exhaust gas, not only reducing the high frequency component of the exhaust noise, but also reducing harmful substances in the exhaust gas through the adsorption of particulate matter and the cooling effect of the water mist, and enhancing the sound attenuation effect by prolonging the gas-liquid mixing time. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 Structure diagram of the exhaust spraying assembly installed on the muffler.

[0027] In the figure: 1, muffler body; 2, exhaust elbow; 21, first pipe body; 22, second pipe body; 3, water spraying pipe; 4, drain pipe; 5, regulating valve; 6, telescopic assembly; 7, sealing gasket; 8, universal nozzle. DETAILED DESCRIPTION

[0028] In order to make the personnel in the technical field better understand the present application scheme, the technical solutions in the embodiments of the present application will be described clearly and completely in the following combined with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] The exhaust spraying assembly, the muffler and the fracturing truck provided by the embodiments of the present application can solve the technical problem that the traditional muffler can only play a simple sound attenuation and noise reduction role, and cannot meet the actual use requirement.

[0030] In a first aspect, as Figure 1As shown, the embodiment of the present application provides a kind of exhaust spray assembly, it includes: exhaust elbow 2, exhaust elbow 2 includes first pipe body 21 and second pipe body 22, the top end of first pipe body 21 is exhaust end, and its bottom end is provided with drain, drain is communicated with drain pipe 4, drain pipe 4 is equipped with regulating valve 5, one end of second pipe body 22 is communicated with the side wall of first pipe body 21, and its other end is used to be communicated with the exhaust end of muffler body 1;Water jet pipe 3, one end of water jet pipe 3 is communicated with the side wall of second pipe body 22, and its other end is used to be communicated with external water supply pipeline, along the injection direction of water jet pipe 3 and the intake direction of second pipe body 22, the intersection angle α of the injection direction of water jet pipe 3 and second pipe body 22 is acute angle.

[0031] In the embodiment, exhaust elbow 2 adopts split design, first pipe body 21 and second pipe body 22 form the curved form channel, so that exhaust gas and spray water flow form mixed flow field in second pipe body 22, wherein the acute angle α of water jet pipe 3 and second pipe body 22 can enhance the contact area of water mist and exhaust gas, and improve the noise reduction effect;At the same time, the drain of the bottom of first pipe body 21 and drain pipe 4 cooperate with regulating valve 5, to realize the controllable discharge of condensate water or excess spray water, to avoid the influence of water accumulation on system stability;The injection direction of water jet pipe 3 and the intake direction of second pipe body 22 are acute angle, utilize the principle of fluid dynamics to make water mist diffuse along the flow direction of exhaust gas, both reduce the high frequency component of exhaust noise, and reduce harmful substances in exhaust gas through the adsorption of particulate matter and the cooling effect of water mist, and enhance the muffling effect by prolonging the gas-liquid mixing time.

[0032] In combination with the first aspect, in an embodiment, as shown, Figure 1 Water jet pipe 3 is installed with universal nozzle 8 at one end in second pipe body 22, and universal nozzle 8 is connected with the inner side wall of second pipe body 22 with telescopic assembly 6;Telescopic assembly 6 can adjust the steering angle of universal nozzle 8 by extension, to reduce the intersection angle α of the injection direction of water jet pipe 3 and second pipe body 22.

[0033] In the embodiment, telescopic assembly 6 (such as electric push rod or hydraulic cylinder) is hinged between the inner wall of second pipe body 22 and universal nozzle 8, and its telescopic movement directly changes the deflection angle of universal nozzle 8, when telescopic assembly 6 is extended, universal nozzle 8 is pushed to deviate to the central axis direction of second pipe body 22, so that the intersection angle α of the injection direction of water jet pipe 3 and airflow direction is reduced, to form more close to the same direction of injection trajectory, suitable for high flow rate working condition, by reducing angle α, to reduce the interference of water flow to exhaust resistance, to avoid the increase of back pressure, while maintaining the atomization coverage range, water mist diffuses along the axial direction of second pipe body 22, to form the laminar mixing with exhaust gas in the same direction, to reduce the energy loss of turbulent flow, suitable for the working condition requiring rapid exhaust (such as fracturing truck short time high load operation).

[0034] In combination with the first aspect, in an embodiment, the telescopic assembly 6 comprises a memory alloy spring connected between the universal nozzle 8 and the inner side wall of the second pipe body 22; when the temperature inside the second pipe body 22 exceeds a preset temperature value, the memory alloy spring is elongated to reduce the intersection angle α between the spraying direction of the water jet pipe 3 and the second pipe body 22.

[0035] In this embodiment, the telescopic assembly 6 adopts a shape memory alloy spring (such as Ni-Ti alloy). When the temperature inside the second pipe body 22 exceeds a preset threshold value (such as 80°C), the alloy undergoes austenitic phase transformation, the spring is axially elongated, and the universal nozzle 8 is pulled to deviate from the central axis of the second pipe body 22, so that the angle α between the spraying direction and the pipe body axis is reduced. After the temperature decreases, the memory alloy spring is retracted and reset with the assistance of a restoring spring (such as a common steel spring), the angle α increases, and the initial spraying angle is restored. The reduction of the angle α reduces the water flow resistance, the spraying direction tends to be parallel to the airflow direction, the interference of water mist on the exhaust airflow is reduced, and the system efficiency is prevented from being reduced due to the increase of back pressure.

[0036] In combination with the first aspect, in an embodiment, the outer wall of the second pipe body 22 is wrapped with a double-layer cooling jacket, the double-layer cooling jacket is filled with a phase change material between the jackets, a coolant supplement port is arranged at the top of the double-layer cooling jacket, and a heat dissipation finned tube is fixed at the bottom of the double-layer cooling jacket.

[0037] In this embodiment, the double-layer cooling jacket adopts a tube-type double-layer cavity design, the phase change material (such as a paraffin-based composite material) is filled between the outer jacket and the inner jacket, the phase change material absorbs heat and melts during the high-temperature stage of the second pipe body 22, delays the temperature rise rate of the pipe wall, and avoids local overheating to cause material fatigue. The molten liquid phase change material uniformly distributes heat through natural convection, reduces the temperature difference between the inner and outer layers of the jacket, and improves the cooling stability. The jacket top is provided with a coolant supplement port for regularly supplementing the phase change material or coolant to maintain the heat storage capacity. The double-layer cooling jacket is fixed with a spiral finned tube at the bottom, and the surface of the fin can be treated with aluminum plating to enhance the radiation heat dissipation efficiency. Further, the heat dissipation finned tube is internally circulated with cooling water to quickly export heat between the jackets through forced convection; or the heat dissipation finned tube expands the surface area to combine with the ambient airflow to achieve natural dissipation of waste heat and reduce system energy consumption.

[0038] In combination with the first aspect, in an embodiment, a temperature sensor is mounted on the outer wall of the muffler body 1, and an electromagnetic valve is mounted on the water jet pipe 3; the exhaust gas spraying assembly further comprises a controller configured to control the electromagnetic valve to be started to make the water jet pipe 3 communicate with an external water supply pipeline when the temperature sensor detects that the exhaust gas temperature exceeds a threshold value.

[0039] In this embodiment, a thermocouple or an infrared temperature sensor can be installed on the outer wall of the muffler body 1 to monitor the exhaust temperature in real time and transmit it to the controller. When the detected temperature exceeds the preset threshold (such as 150°C), the controller sends a start signal to the electromagnetic valve of the water spray pipe 3 to connect the external water supply pipeline for spray cooling.

[0040] In combination with the first aspect, in an embodiment, the second pipe body 22 is connected with the exhaust end flange of the muffler body 1, and a sealing gasket 7 is arranged at the flange joint thereof.

[0041] In this embodiment, the second pipe body 22 is connected with the muffler body 1 through flange plates, and the sealing gasket 7 prevents sealing failure caused by temperature difference.

[0042] Further, the flange faces can be matched with concave-convex surfaces to limit radial displacement and improve centering accuracy.

[0043] In combination with the first aspect, in an embodiment, the inner wall surface of the exhaust elbow 2 is coated with a corrosion-resistant coating.

[0044] In this embodiment, the corrosion-resistant coating significantly improves the durability and reliability of the exhaust elbow 2 under high-temperature, corrosion, and erosion combined conditions, and is suitable for the harsh environment of fracturing truck operation.

[0045] In combination with the first aspect, in an embodiment, the corrosion-resistant coating includes a tungsten carbide base layer, an aluminum oxide composite intermediate layer, and a fluorosilicon resin surface self-repairing layer.

[0046] In this embodiment, the tungsten carbide base layer (WC-Co) forms a dense bottom layer using a high-velocity oxygen fuel (HVOF) process, with a microhardness of HV 1300-1500, providing a particle erosion-resistant and mechanically supporting matrix for the overall coating; the aluminum oxide composite intermediate layer (Al2O3-TiO2) builds a nano-composite structure through plasma spraying, filling in micro defects of the bottom layer and resisting H2S, SO2, and other acidic gas corrosion using the chemical inertness of Al2O3; the fluorosilicon resin surface self-repairing layer is doped with microcapsule corrosion inhibitors (such as benzotriazole) and fluorosilicon resin (PVDF-SiO2 composite), and when the surface is mechanically damaged or corroded, the microcapsules rupture to release the corrosion inhibitors, which crosslink with the fluorosilicon resin to form a temporary protective film, significantly extending the service life of the exhaust elbow 2 under high-temperature, corrosion, and erosion combined conditions.

[0047] In a second aspect, the embodiments of the present application provide a muffler, comprising: a muffler body 1; an exhaust elbow 2, the exhaust elbow 2 comprising a first pipe body 21 and a second pipe body 22, a top end of the first pipe body 21 being an exhaust end, and a bottom end of the first pipe body 21 being provided with a drain port, the drain port being communicated with a drain pipe 4, the drain pipe 4 being provided with an adjusting valve 5, one end of the second pipe body 22 being communicated with a side wall of the first pipe body 21, and the other end of the second pipe body 22 being communicated with an exhaust end of the muffler body 1; a water spraying pipe 3, one end of the water spraying pipe 3 being communicated with a side wall of the second pipe body 22, and the other end of the water spraying pipe 3 being used to be communicated with an external water supply pipeline, and along a spraying direction of the water spraying pipe 3 and an air inlet direction of the second pipe body 22, the spraying direction of the water spraying pipe 3 and the second pipe body 22 intersect at an acute angle α.

[0048] In the embodiments, the exhaust elbow 2 is designed in a split type, the first pipe body 21 and the second pipe body 22 form a curved channel, so that the exhaust gas and the water flow form a mixed flow field in the second pipe body 22, wherein the acute angle α between the water spraying pipe 3 and the second pipe body 22 can enhance the contact area between the water mist and the exhaust gas, and improve the noise reduction effect; meanwhile, the drain port at the bottom of the first pipe body 21 and the drain pipe 4 cooperate with the adjusting valve 5 to realize controllable discharge of the condensed water or the excess spraying water, so as to avoid the influence of the accumulated water on the system stability; the spraying direction of the water spraying pipe 3 and the air inlet direction of the second pipe body 22 are at an acute angle, the water mist is diffused along the flow direction of the exhaust gas by using the principle of fluid dynamics, so as to reduce the high frequency component of the exhaust noise, and reduce the harmful substances in the exhaust gas by the water mist adsorption and cooling effect, and the noise reduction effect is enhanced by prolonging the gas-liquid mixing time.

[0049] In a third aspect, the embodiments of the present application provide a fracturing truck, comprising the muffler as mentioned above.

[0050] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "upper", "lower" and the like are based on the positions or location relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0052] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. An exhaust spray assembly, characterized in that, It includes: The exhaust elbow (2) includes a first pipe body (21) and a second pipe body (22). The top end of the first pipe body (21) is the exhaust end, and the bottom end of the first pipe body (21) is provided with a drain outlet. The drain outlet is connected to a drain pipe (4), and the drain pipe (4) is equipped with a regulating valve (5). One end of the second pipe body (22) is connected to the side wall of the first pipe body (21), and the other end of the second pipe body (22) is used to connect to the exhaust end of the muffler body (1). The water spray pipe (3) has one end connected to the side wall of the second pipe body (22) and the other end connected to the external water supply pipeline. Along the spray direction of the water spray pipe (3) and the air intake direction of the second pipe body (22), the angle α between the spray direction of the water spray pipe (3) and the second pipe body (22) is an acute angle.

2. The exhaust spray assembly as described in claim 1, characterized in that, The water spray pipe (3) is equipped with a universal nozzle (8) at one end inside the second pipe body (22), and a telescopic component (6) is connected between the universal nozzle (8) and the inner wall of the second pipe body (22). The extension of the telescopic component (6) can adjust the turning angle of the universal nozzle (8) to reduce the angle α between the spray direction of the water spray pipe (3) and the second pipe body (22).

3. The exhaust spray assembly as described in claim 2, characterized in that, The telescopic component (6) includes a memory alloy spring, which is connected between the universal nozzle (8) and the inner wall of the second tube (22); When the temperature inside the second tube (22) exceeds the preset temperature value, the memory alloy spring extends to reduce the angle α between the spray direction of the water spray pipe (3) and the second tube (22).

4. The exhaust spray assembly as described in claim 1, characterized in that, The outer wall of the second tube (22) is wrapped with a double-layer cooling jacket. The space between the jackets of the double-layer cooling jacket is filled with phase change material. The top of the double-layer cooling jacket is provided with a coolant replenishment port, and the bottom of the jacket is fixed with a heat dissipation finned tube.

5. The exhaust spray assembly as described in claim 1, characterized in that, A temperature sensor is installed on the outer wall of the muffler body (1), and a solenoid valve is installed on the water spray pipe (3); The exhaust spray assembly also includes a controller, which is used to activate the solenoid valve when the temperature sensor detects that the exhaust temperature exceeds a threshold, so that the spray pipe (3) is connected to the external water supply pipeline.

6. The exhaust spray assembly as described in claim 1, characterized in that, The second pipe body (22) is connected to the exhaust end flange of the muffler body (1), and a sealing gasket (7) is provided at the flange joint.

7. The exhaust spray assembly as described in claim 1, characterized in that, The inner wall surface of the exhaust elbow (2) is coated with a corrosion-resistant coating.

8. The exhaust spray assembly as described in claim 7, characterized in that, The corrosion-resistant coating comprises a tungsten carbide substrate, an alumina composite intermediate layer, and a fluorosilicone resin surface self-healing layer.

9. A silencer, characterized in that, It includes: Muffler body (1); The exhaust elbow (2) includes a first pipe body (21) and a second pipe body (22). The top end of the first pipe body (21) is the exhaust end, and the bottom end of the first pipe body (21) is provided with a drain outlet. The drain outlet is connected to a drain pipe (4), and the drain pipe (4) is equipped with a regulating valve (5). One end of the second pipe body (22) is connected to the side wall of the first pipe body (21), and the other end of the second pipe body (22) is connected to the exhaust end of the muffler body (1). The water spray pipe (3) has one end connected to the side wall of the second pipe body (22) and the other end connected to the external water supply pipeline. Along the spray direction of the water spray pipe (3) and the air intake direction of the second pipe body (22), the angle α between the spray direction of the water spray pipe (3) and the second pipe body (22) is an acute angle.

10. A fracturing truck, characterized in that, It includes the muffler as described in claim 9.

Images