Tail gas collecting device

Abstract

The utility model relates to a tail gas collecting device which comprises a collector, the collector is provided with a hollow cylinder, the cylinder comprises a gas inlet section, a collecting section and a gas outlet section, and the gas inlet section and the gas outlet section are connected to the two axial ends of the collecting section respectively; the air inlet section is provided with an air inlet; a collecting pipe is mounted in the middle of the collecting section, and one end of the collecting pipe extends into the collecting section; the air outlet section is provided with an air outlet; wherein the inner diameter of the collecting section is larger than that of the air inlet section, the length of the collecting section is also larger than that of the air inlet section, and the inner diameter of the air outlet is smaller than that of the air inlet section; the tail gas collecting device is simple in structure and can ensure the collecting accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a tail gas collecting device. Background Art

[0002] When gasoline engines and other garden tools or other machines that use gasoline and diesel are actually leaving the factory, it is necessary to test and analyze the exhaust gas emitted by the machines when they are in working condition.

[0003] In some existing detection methods, a collection tube is inserted into the inside of the machine to collect exhaust gas, and the exhaust gas is allowed to enter the exhaust gas analyzer for detection and analysis. This method is prone to air leakage during the collection process, causing air to mix into the collection port, resulting in large errors in the collected data and low accuracy. In addition, there is a collection method such as that disclosed in CN218408845U, in which one end of the collection device is connected to the muffler and the other end is connected to the exhaust gas collection hose, but the concentration of the exhaust gas collected in this way cannot be guaranteed and the accuracy is not enough. In addition, the end connected to the muffler cannot be adjusted and replaced, and cannot be adapted to a variety of muffler models. Therefore, the utility model proposes an exhaust gas collection device that is not only simple in structure but also ensures the accuracy of the collection. Utility Model Content

[0004] The utility model aims to provide an exhaust gas collecting device which has a simple structure and can ensure collection accuracy.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An exhaust gas collection device comprises a collector, the collector having a hollow cylinder, the cylinder comprising an air inlet section, a collection section and an air outlet section, the air inlet section and the air outlet section are respectively connected to two axial ends of the collection section;

[0007] The air intake section is provided with an air intake port;

[0008] A collection tube is installed in the middle of the collection section, and one end of the collection tube extends into the interior of the collection section;

[0009] The air outlet section is provided with an air outlet;

[0010] The inner diameter of the collecting section is larger than the inner diameter of the air inlet section, the length of the collecting section is also larger than the length of the air inlet section, and the inner diameter of the air outlet is smaller than the inner diameter of the air inlet section.

[0011] In one embodiment, the air inlet section, the collecting section and the air outlet section are all cylindrical tube structures.

[0012] In one embodiment, the air outlet section also includes a transition section, which is arranged between the collecting section and the air outlet. The transition section tapers to connect the collecting section and the air outlet, and the end face radius of the transition section at the connection with the collecting section is greater than the end face radius of the transition section at the connection with the air outlet.

[0013] In one embodiment, the end of the collection pipe extending into the collection section is arranged with an oblique opening, and the oblique opening direction of the collection pipe is toward the air inlet section.

[0014] In one embodiment, the connection position between the collection tube and the collection section is located at the center of the collection section.

[0015] In one embodiment, the air inlet is further equipped with an adapter head, and one end of the adapter head is detachably connected to the air inlet.

[0016] In one embodiment, the adapter head includes a nut for fixing, and the adapter head is detachably connected to the air inlet via the nut.

[0017] In one embodiment, the nut and the air inlet are respectively provided with matching internal threads and external threads, the end of the adapter head connected to the air inlet is provided with a flange surface, the nut is sleeved on the adapter head and is provided with a blocking surface matching the flange surface.

[0018] In one embodiment, the exhaust gas collection device further includes a support frame, the support frame includes a base and a support rod, and the axial ends of the support rod are respectively connected to the base and the collector.

[0019] In one embodiment, the support rod includes a telescopic rod and a positioning device, and the positioning device can adjust the length of the telescopic rod.

[0020] The utility model adopts the above technical solution, which has the beneficial effect that the collector of the exhaust gas collection device provided by the utility model is divided into three parts: an air intake section, a collection section and an air outlet section. At the same time, the inner diameter of the collection section is set to be larger than the inner diameter of the air intake section, and the length of the collection section is also larger than the length of the air intake section. The inner diameter of the air outlet is smaller than the inner diameter of the air intake section, so that the flow of exhaust gas in the collector is reduced and can be more concentrated in the collection section, thereby making the collected exhaust gas more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional schematic diagram of an exhaust gas collection device is shown.

[0022] Figure 2 A schematic perspective view of a collector is shown.

[0023] Figure 3 A schematic cross-sectional view of the collector is shown. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0025] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0026] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0027] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0028] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0029] In the following description, in order to clearly demonstrate the structure and working mode of the utility model, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0030] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] like Figure 1-Figure 3 As shown, this embodiment provides an exhaust gas collection device, including a collector 1 and a support frame 2. The collector 1 is a hollow cylinder extending in one direction, and the hollow cylinder includes an air inlet section 11, a collection section 12 and an air outlet section 13, and the air inlet section 11 and the air outlet section 13 are connected to the axial ends of the collection section 12. When the exhaust gas is collected, the exhaust gas enters from the air inlet section 11 and gathers and stays in the collection section 12, and is finally discharged from the air outlet section 13.

[0033] Specifically, the air inlet section 11 is provided with an air inlet 111, and the air inlet 111 is detachably provided with an adapter head 3. In this embodiment, a flange surface 31 is provided at one end of the adapter head 3 connected to the air inlet 111, and the other end is used to connect to the exhaust outlet on the machine muffler. The air inlet 111 is provided with an external thread, and the adapter head 3 is connected through a nut 32 having a matching arrangement with the flange surface 31 of the adapter head 3 and the external thread of the air inlet 111, the nut 32 having an internal thread matching the external thread of the air inlet 111 and a blocking surface 321 matching the flange surface 31 of the adapter head 3, the nut 32 is sleeved on the adapter head 3 and fixedly connected with the air inlet 111 by thread, and at the same time, the blocking surface 321 presses the flange surface 31 against the end surface of the air inlet 111, thereby fixing the adapter head 3 to the air inlet section 11. This assembly method can be used to install a variety of adapters of different specifications, and thus can be adapted to exhaust outlets of different sizes. Since the air inlet can be installed with a variety of adapters, it can be used for exhaust collection of machines equipped with various types of mufflers, and has a wider range of applications.

[0034] The tail gas enters the collection section 12 after passing through the air intake section 11. A collection tube 14 is installed in the middle of the collection section 12. One end of the collection tube 14 is located at the center of the collection section 12, and the other end is located outside the tail gas collection device and connected to the hose of the tail gas detection instrument. The tail gas enters the detection instrument for detection after passing through the collection tube. Since the closer the collection section is to the air intake section or the air outlet section, the easier it is to mix with air, the concentration will decrease, affecting the accuracy of the collected data. Therefore, in order to ensure that the tail gas concentration is higher and more accurate, the collection tube 14 is set in the middle of the collection section 12.

[0035] Preferably, the end of the collection pipe 14 located at the center of the collection section extending to the pipe mouth 141 in the collection section 12 is arranged with an oblique opening, which is used to increase the contact area between the pipe mouth of the collection pipe 14 and the exhaust gas, making it easier for the exhaust gas to enter the collection pipe 14, and the oblique opening of the collection pipe 14 is toward the side of the air intake section 11, thereby ensuring the concentration of the collected exhaust gas.

[0036] The gas outlet section 13 includes a transition section 131 and a gas outlet 132, wherein the transition section 131 is arranged between the collection section 12 and the gas outlet 132. The transition section 131 is designed in a quasi-conical structure, and the end face radius of the transition section 131 at the connection with the collection section 12 is larger than the end face radius at the connection with the gas outlet 132. The advantage of such a design is that, on the one hand, the radius at the gas outlet 132 is small, making it difficult to discharge the exhaust gas, and the radius of the transition section 131 gradually decreases from large to small, so that the exhaust gas flow is reduced and can be more concentrated at the collection section 12, and the exhaust gas collected is more accurate. On the other hand, it plays a role in transition discharge, preventing the internal pressure of the collection device from being too high due to the accumulation of gas, which affects the collection effect.

[0037] Preferably, the inner diameter of the collecting section 12 is larger than the inner diameter of the air inlet section 11, and the length of the collecting section 12 is also larger than the length of the air inlet section 11, and the inner diameter of the air outlet 132 is smaller than the inner diameter of the air inlet section 11, so that the exhaust gas is easily retained in the collecting section 12 after entering from the air inlet 111, and is not easily discharged from the air outlet, thereby improving the collection accuracy.

[0038] See also Figure 1 The support frame 2 also includes a support rod 21 and a base 22. The support rod 21 is fixed on the base 22. The support rod 21 adopts a retractable setting, including a retractable rod 211 and a positioning device 212 that can adjust the height of the support rod. The collector 1 is fixedly connected to the top of the support rod 21, so that the exhaust gas collection device can adapt to the exhaust gas collection of machines at different heights.

[0039] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. An exhaust gas collection device, comprising a collector, characterized in that: The collector has a hollow cylinder, which includes an air inlet section, a collecting section and an air outlet section, wherein the air inlet section and the air outlet section are respectively connected to two axial ends of the collecting section; The air intake section is provided with an air intake port; A collection tube is installed in the middle of the collection section, and one end of the collection tube extends into the interior of the collection section; The air outlet section is provided with an air outlet; The inner diameter of the collecting section is larger than the inner diameter of the air inlet section, the length of the collecting section is also larger than the length of the air inlet section, and the inner diameter of the air outlet is smaller than the inner diameter of the air inlet section.

2. The exhaust gas collection device according to claim 1, characterized in that: The air inlet section, the collecting section and the air outlet section are all cylindrical tube structures.

3. The exhaust gas collection device according to claim 1, characterized in that: The air outlet section also includes a transition section, which is arranged between the collecting section and the air outlet. The transition section tapers to connect the collecting section and the air outlet, and the end face radius of the transition section at the connection with the collecting section is greater than the end face radius of the transition section at the connection with the air outlet.

4. The exhaust gas collection device according to claim 1, characterized in that: The end of the pipe opening of the collection pipe extending into the collection section is arranged in an oblique manner, and the oblique direction of the pipe opening of the collection pipe faces one side of the air inlet section.

5. The exhaust gas collection device according to claim 1, characterized in that: The connection position between the collection tube and the collection section is located at the center of the collection section.

6. The exhaust gas collection device according to claim 1, characterized in that: The air inlet is also equipped with an adapter head, and one end of the adapter head is detachably connected to the air inlet.

7. The exhaust gas collection device according to claim 6, characterized in that: The adapter head includes a nut for fixing, and the adapter head is detachably connected to the air inlet through the nut.

8. The exhaust gas collection device according to claim 7, characterized in that: The nut and the air inlet are respectively provided with matching internal threads and external threads, the end of the adapter head connected to the air inlet is provided with a flange surface, the nut is sleeved on the adapter head and provided with a blocking surface matched with the flange surface.

9. The exhaust gas collection device according to claim 1, characterized in that: The exhaust gas collection device also includes a support frame, which includes a base and a support rod, and the axial ends of the support rod are respectively connected to the base and the collector.

10. The exhaust gas collection device according to claim 9, characterized in that: The support rod comprises a telescopic rod and a positioning device, and the positioning device can adjust the length of the telescopic rod.

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