Exhaust device and engine

Abstract

The utility model discloses an exhaust device and an engine, the exhaust device comprises an exhaust pipe and a control valve, and the exhaust pipe comprises a first pipe section and a second pipe section communicated with the first pipe section which are sequentially arranged along the airflow direction. The control valve comprises a valve body control module arranged in the first pipe section and an air valve located on the second pipe section, the valve body control module comprises a first sleeve and a connecting piece connected with the first sleeve in a sliding and sealing mode, the first sleeve is fixedly connected with the first pipe section, and the connecting piece is fixedly connected with the air valve. An air flow channel is arranged between the periphery of the air valve and the inner wall of the second pipe section, the air inlet end, close to the first pipe section, of the air valve and the air inlet of the second pipe section form a flow guide channel, and a cavity containing thermal expansion and cold contraction fluid is defined by the first sleeve and the connecting piece. The volume of the cavity changes along with the volume of the thermal expansion and cold contraction fluid to adjust the sectional area of the diversion channel perpendicular to the airflow direction. The use cost of the exhaust device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment technical field, especially a kind of exhaust device and engine. BACKGROUND

[0002] In the exhaust pipe of engine, the opening and closing of exhaust valve is usually controlled by exhaust butterfly valve. Specifically, temperature measuring device senses the temperature of gas in exhaust pipe, and temperature measuring device is connected with controller, and controller controls exhaust butterfly valve to open when accepting that the temperature value in exhaust pipe exceeds preset value.

[0003] The way of controlling exhaust temperature by controlling the opening of exhaust butterfly valve needs to set temperature measuring device, and also needs to set controller and other electric equipment, which leads to high use cost of exhaust device.

[0004] Therefore, how to reduce the use cost of exhaust device is a technical problem to be solved by the skilled in the art. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of exhaust device and engine to reduce the use cost of exhaust device.

[0006] The exhaust device provided by the application comprises:

[0007] Exhaust pipe, the exhaust pipe includes first pipe section and second pipe section communicated with the first pipe section arranged in turn along airflow direction;

[0008] Control valve, the control valve includes valve body control module arranged in the first pipe section and valve in the second pipe section, the valve body control module includes first sleeve and connecting piece slidably sealedly connected with the first sleeve, the first sleeve is fixedly connected with the first pipe section, the connecting piece is fixedly connected with the valve, the outer periphery of the valve and the inner wall between the second pipe section are equipped with airflow passage, the air inlet of the valve near the first pipe section and the second pipe section form flow guide passage, the first sleeve and the connecting piece support and form the cavity that is surrounded and has thermal expansion and contraction fluid, the cavity volume changes with the volume of thermal expansion and contraction fluid to adjust the cross-sectional area of the flow guide passage perpendicular to airflow direction.

[0009] Optionally, in the above exhaust device, the control valve further includes elastic member, one end of the elastic member is connected with the first sleeve, and the other end is connected with the connecting piece.

[0010] Optionally, in the above exhaust device, the elastic member is spring.

[0011] Optionally, in the above exhaust device, the first sleeve is heat conducting member.

[0012] Optionally, in the above exhaust device, the connecting member comprises:

[0013] A second sleeve, an outer circumferential wall surface of the second sleeve is in sliding sealing connection with an inner circumferential wall surface of the first sleeve, and an outer wall of a bottom of the second sleeve is opposite to an inner wall of a bottom of the first sleeve;

[0014] A transmission rod, one end of the transmission rod is connected to the inner wall of the bottom of the second sleeve, and the other end of the transmission rod is connected to the valve.

[0015] Optionally, in the above exhaust device, the first pipe section and the second pipe section are connected through a tapered pipe section, and the air inlet end of the valve is a tapered surface opposite to the tapered pipe section.

[0016] Optionally, in the above exhaust device, the tapered pipe section and the air inlet end of the valve are both conical structures, the inner walls of the first pipe section and the second pipe section are both cylindrical, and the inner diameter of the second pipe section is greater than the inner diameter of the first pipe section.

[0017] Optionally, in the above exhaust device, the support member is provided, one end of the support member is connected to the outer wall of the first sleeve, the other end of the support member is connected to the inner wall of the first pipe section, a plurality of support members are provided, and all the support members are uniformly distributed around the outer periphery of the first sleeve.

[0018] Optionally, in the above exhaust device, the thermal expansion and contraction fluid is paraffin or sodium.

[0019] An engine comprising an exhaust device, the exhaust device being any one of the above exhaust devices.

[0020] In the above technical solution, the exhaust device provided by the utility model comprises an exhaust pipe and a control valve, the exhaust pipe comprises a first pipe section and a second pipe section communicated with the first pipe section arranged in sequence along the air flow direction. The control valve comprises a valve body control module arranged in the first pipe section and a valve located in the second pipe section, the valve body control module comprises a first sleeve and a connecting member in sliding sealing connection with the first sleeve, the first sleeve is fixedly connected with the first pipe section, the connecting member is fixedly connected with the valve, an air flow channel is arranged between the outer periphery of the valve and the inner wall of the second pipe section, the air inlet end of the valve close to the first pipe section and the air inlet of the second pipe section form a flow guide channel, the first sleeve and the connecting member surround to form a chamber containing a thermal expansion and contraction fluid, and the volume of the chamber changes with the volume of the thermal expansion and contraction fluid to adjust the sectional area of the flow guide channel perpendicular to the air flow direction.

[0021] It can be known from the above description that, in the exhaust device provided by the application, the opening degree of the exhaust pipe is changed by the thermal expansion fluid volume sensing the gas temperature in the exhaust pipe, and the cross-sectional area of the flow guide channel perpendicular to the airflow direction is changed, without the need of additional temperature measuring devices and controllers and other electrical equipment, so that the use cost of the exhaust device provided by the application is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0023] Figure 1 The structural schematic diagram of the exhaust device provided by the embodiment of the present application is shown in the figure.

[0024] Figure 2 The airflow schematic diagram of the exhaust device provided by the embodiment of the present application when opened is shown in the figure.

[0025] Figure 3 The top view of the exhaust device provided by the embodiment of the present application is shown in the figure.

[0026] Figure 4 The valve body control module and the valve arrangement schematic diagram provided by the embodiment of the present application are shown in the figure.

[0027] Figure 5 The structural schematic diagram of the first sleeve provided by the embodiment of the present application is shown in the figure.

[0028] Figure 6 The structural schematic diagram of the elastic member provided by the embodiment of the present application is shown in the figure.

[0029] Among them Figures 1-6 In the middle:

[0030] 1-exhaust pipe, 101-first pipe section, 102-conical pipe section, 103-second pipe section;

[0031] 2-valve body control module, 201-cylinder bottom, 202-first sleeve, 203-cavity, 204-cylinder bottom, 205-second sleeve, 206-transmission rod;

[0032] 3-thermal expansion fluid, 4-elastic member;

[0033] 5-valve, 501-inlet end, 502-outer periphery;

[0034] 6-supporting member. DETAILED DESCRIPTION

[0035] The utility model discloses an exhaust device and engine to reduce the use cost of exhaust device.

[0036] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model is further explained in detail below in combination with the drawings and implementation.

[0037] Please refer to Figures 1-6 .

[0038] In a specific embodiment, the exhaust device provided by the utility model embodiment comprises an exhaust pipe 1 and a control valve, the exhaust pipe 1 comprises a first pipe section 101 and a second pipe section 103 communicated with the first pipe section 101 arranged in sequence along the airflow direction. The first pipe section 101 and the second pipe section 103 can be cylindrical pipe bodies, wherein the diameter of the first pipe section 101 is smaller than the diameter of the second pipe section 103, and the center lines of the first pipe section 101 and the second pipe section 103 coincide.

[0039] The control valve comprises a valve body control module 2 arranged in the first pipe section 101 and a valve 5 located in the second pipe section 103, the valve body control module 2 comprises a first sleeve 202 and a connecting piece, the connecting piece is in sliding sealing connection with the first sleeve 202, and specifically, a sealing ring is arranged at the connecting position of the two. The first sleeve 202 is fixedly connected with the first pipe section 101, and the first sleeve 202 and the connecting piece support a cavity 203 containing a thermal expansion and contraction fluid 3, the thermal expansion and contraction fluid 3 is paraffin or sodium, and the volume of the thermal expansion and contraction fluid 3 is determined according to actual needs, which is not limited in the application.

[0040] In order to facilitate the timely transmission of the heat of the gas in the exhaust pipe 1 to the thermal expansion and contraction fluid 3, preferably, the first sleeve 202 is a heat conducting piece. Further, the connecting piece can also be a heat conducting piece, and specifically, the first sleeve 202 and the connecting piece can be metal pieces, for example, iron pieces, copper pieces or aluminum pieces.

[0041] The connecting piece is fixedly connected with the valve 5, a gas flow channel is arranged between the outer periphery 502 of the valve 5 and the inner wall of the second pipe section 103, the air inlet end 501 of the valve 5 close to the first pipe section 101 and the air inlet of the second pipe section 103 form a flow guide channel, the first sleeve 202 and the connecting piece support a cavity 203 containing the thermal expansion and contraction fluid 3, and the volume of the cavity 203 changes with the volume of the thermal expansion and contraction fluid 3 to adjust the sectional area of the flow guide channel perpendicular to the airflow direction, that is Figure 1 The distance direction sectional area represented by L.

[0042] It can be known from the above description that, in the exhaust device provided in the embodiments of the present application, the opening degree of the exhaust pipe 1 changes through the volume change of the thermal expansion and contraction fluid 3 in response to the gas temperature in the exhaust pipe 1, and the cross-sectional area of the flow guide channel perpendicular to the airflow direction changes, without the need for additional temperature measuring devices and controllers and other electrical equipment, so that the use cost of the exhaust device provided in the present application is reduced.

[0043] As shown in Figure 1 and Figure 2 , because the thermal expansion and contraction fluid 3 in the cold region shrinks more, the position of the valve 5 moves upward, and the distance L of the exhaust flow channel changes, which may cause the risk of unsmooth exhaust or even blockage of the exhaust channel. In order to reduce this risk, the control valve further comprises an elastic member 4, one end of the elastic member 4 is connected to the first sleeve 202, and the other end of the elastic member 4 is connected to the connecting member. Specifically, the elastic member 4 can be a bendable steel sheet or a spring. In order to facilitate installation, preferably, the elastic member 4 is a spring, which is compressed until and is wound to resist the position of the valve 5 being too high. In addition, when the engine operates at high load, the exhaust temperature is high, the position of the valve 5 is low, and in order to prevent the fluid from being pushed out of the first sleeve 202 after being heated and expanded, the spring is stretched to resist the position of the valve 5 being too low.

[0044] In one specific embodiment, the connecting member comprises a second sleeve 205 and a transmission rod 206, the outer peripheral wall surface of the second sleeve 205 is in sliding sealing connection with the inner peripheral wall surface of the first sleeve 202, and the outer wall of the cylinder bottom 204 of the second sleeve 205 is opposite to the inner wall of the cylinder bottom 201 of the first sleeve 202. One end of the transmission rod 206 is connected to the inner wall of the cylinder bottom 204 of the second sleeve 205, and the other end of the transmission rod 206 is connected to the valve 5. The sliding sealing connection between the first sleeve 202 and the second sleeve 205 ensures that the valve 5 does not swing left and right, but can only move along the center line direction of the first sleeve 202 and the second sleeve 205. The second sleeve 205 has a certain length and plays a certain sealing role to reduce the risk of fluid leakage.

[0045] The cylinder body of the first sleeve 202 and the second sleeve 205 is preferably a cylindrical surface body.

[0046] As shown in Figure 1 and Figure 2 , in one specific embodiment, the first pipe section 101 and the second pipe section 103 are connected through a tapered pipe section 102, and the air inlet end 501 of the valve 5 is a tapered surface opposite to the tapered pipe section 102. By setting the air inlet end 501 as a tapered surface, a certain guiding effect on the airflow is achieved to facilitate the smooth entry of the gas from the first pipe section 101 into the second pipe section 103.

[0047] Further, the conical tube segment 102 and the intake end 501 of the valve 5 are both conical structures, which are arranged to make the second tube segment 103 intake air uniformly in the circumferential direction. Further, preferably, the inner walls of the first tube segment 101 and the second tube segment 103 are both cylindrical, and the inner diameter of the second tube segment 103 is greater than that of the first tube segment 101.

[0048] In one specific embodiment, the exhaust device further comprises supports 6, one end of each support 6 is connected to the outer wall of the first sleeve 202, and the other end of each support 6 is connected to the inner wall of the first tube segment 101, the supports 6 are provided in plurality, and all the supports 6 are uniformly distributed in the circumferential direction around the outer wall of the first sleeve 202. As shown in Figure 3 The supports 6 are provided in four, and the four supports 6 are distributed in a cross shape.

[0049] For the convenience of understanding, the following will be described in combination with a specific working mode. The thermal expansion and contraction fluid 3 expands and contracts to push the valve 5 to move up and down. When the engine operates at a small load, the exhaust temperature is low, the thermal expansion and contraction fluid 3 contracts, the valve 5 has a small lift, and the flow passage has a small flow area, thereby achieving the effect of thermal management. When the engine operates at a large load, the exhaust temperature is high, the thermal expansion and contraction fluid 3 expands to push the valve 5 to move downward, the flow area of the flow passage increases, that is, the cross-sectional area of the flow passage perpendicular to the airflow direction increases, and the exhaust is discharged more smoothly. That is, the exhaust device controls the opening lift of the exhaust device through the thermal expansion and contraction of the thermal expansion and contraction fluid 3.

[0050] The engine provided in the present application comprises the exhaust device, wherein the exhaust device is any of the above-described exhaust devices. The foregoing describes the specific structure of the exhaust device, and the present application comprises the above-described exhaust device, and also has the above-described technical effects.

[0051] The embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0052] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An exhaust device, characterized in that, include: An exhaust pipe (1) includes a first pipe section (101) arranged sequentially along the airflow direction and a second pipe section (103) connected to the first pipe section (101); The control valve includes a valve body control module (2) disposed in the first pipe section (101) and a valve (5) located in the second pipe section (103). The valve body control module (2) includes a first sleeve (202) and a connector that is slidably and sealingly connected to the first sleeve (202). The first sleeve (202) is fixedly connected to the first pipe section (101), and the connector is fixedly connected to the valve (5). The outer periphery (502) of the valve (5) is... An airflow channel is provided between the second pipe section (103) and the inner wall. The valve (5) near the air inlet end (501) of the first pipe section (101) and the air inlet of the second pipe section (103) form a flow channel. The first sleeve (202) and the connector surround and form a chamber (203) containing the thermally expanding and contracting fluid (3). The volume of the chamber (203) changes with the volume of the thermally expanding and contracting fluid (3) to adjust the cross-sectional area of ​​the flow channel perpendicular to the airflow direction.

2. The exhaust device according to claim 1, characterized in that, The control valve also includes an elastic element (4), one end of which is connected to the first sleeve (202) and the other end is connected to the connector.

3. The exhaust device according to claim 2, characterized in that, The elastic element (4) is a spring.

4. The exhaust device according to claim 1, characterized in that, The first sleeve (202) is a heat-conducting component.

5. The exhaust device according to claim 1, characterized in that, The connector includes: The second sleeve (205) has an outer peripheral wall surface that is slidably sealed to the inner peripheral wall surface of the first sleeve (202), and the outer wall of the bottom (204) of the second sleeve (205) is directly opposite to the inner wall of the bottom (201) of the first sleeve (202). The transmission rod (206) is connected at one end to the inner wall of the bottom (204) of the second sleeve (205) and at the other end to the valve (5).

6. The exhaust device according to claim 1, characterized in that, The first pipe section (101) and the second pipe section (103) are connected by a tapered pipe section (102), and the intake end (501) of the valve (5) is a tapered surface directly opposite the tapered pipe section (102).

7. The exhaust device according to claim 6, characterized in that, The conical pipe section (102) and the air inlet end (501) of the valve (5) are both conical structures. The inner walls of the first pipe section (101) and the second pipe section (103) are both cylindrical, and the inner diameter of the second pipe section (103) is larger than the inner diameter of the first pipe section (101).

8. The exhaust device according to claim 1, characterized in that, It also includes a support member (6), one end of which is connected to the outer wall of the first sleeve (202), and the other end of which is connected to the inner wall of the first pipe section (101). There are multiple support members (6), and all the support members (6) are evenly distributed around the outer periphery of the first sleeve (202).

9. The exhaust device according to any one of claims 1-8, characterized in that, The thermally expanding and contracting fluid (3) is paraffin or sodium.

10. An engine, characterized in that, Includes an exhaust device, wherein the exhaust device is the exhaust device according to any one of claims 1-9.

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