Exhaust pipe connecting structure for emission test and excavator emission test system

Abstract

The utility model discloses an exhaust pipe connecting structure for emission testing and an excavator emission testing system in the technical field of engineering machinery emission testing, the exhaust pipe connecting structure comprises a connecting pipe, two ends of the connecting pipe are respectively connected with an exhaust pipe and an exhaust collecting pipe through a variable-diameter connecting mechanism; a supporting mechanism is arranged on the side, close to the exhaust pipe, of the middle of the connecting pipe, and an exhaust collecting and fixing mechanism is arranged on the side, close to the exhaust collecting pipe, of the connecting pipe. The device can be matched with exhaust pipes of different vehicle types and exhaust collecting pipes of emission testing equipment at the same time, the cost for purchasing a large number of exhaust connecting pipes of different specifications and models is reduced, and the testing preparation time is shortened; meanwhile, a supporting mechanism and a fixing mechanism are added, stability is improved, and the shaking problem in testing is relieved.

Description

Technical Field

[0001] The utility model relates to an exhaust pipe connection structure of an emission test system and an excavator emission test system, belonging to the technical field of engineering machinery emission test. Background Art

[0002] Since the implementation of the emission regulations for non-road mobile machinery, the environmental protection department has increasingly tightened its supervision of emission pollutants, and enterprises have become more and more aware of self-testing and self-inspection. As far as the emission test of excavators is concerned, the diameters of the exhaust pipes of different models are different, and the exhaust collection pipes of the emission test equipment are also different. Therefore, the tester needs to purchase a large number of exhaust connecting pipes of different specifications and models, which undoubtedly increases the test cost, and the assembly combination also increases the test preparation time. Secondly, the exhaust collection device of the existing emission test equipment has no support and fixed structure, and the stability is poor. It is easy to shake during the test, which affects the accuracy of the test. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide an exhaust pipe connection structure for emission testing and an excavator emission testing system, which can simultaneously match exhaust pipes of different vehicle models and exhaust collection pipes of emission testing equipment, thereby reducing the cost of purchasing a large number of exhaust connecting pipes of different specifications and models and shortening the test preparation time; at the same time, a supporting mechanism and a fixing mechanism are added to improve stability and alleviate the shaking problem during the test.

[0004] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0005] The utility model provides an exhaust pipe connection structure for emission testing, comprising a connecting pipe, wherein both ends of the connecting pipe are respectively connected to the exhaust pipe and the exhaust gas collection pipe through a variable diameter connecting mechanism, a supporting mechanism is provided on a side of the middle part of the connecting pipe close to the exhaust pipe, and an exhaust gas collection fixing mechanism is provided on a side close to the exhaust gas collection pipe.

[0006] Furthermore, the variable diameter connecting mechanism includes a reducer and a connecting fixture, the reducer is arranged at both ends of the connecting pipe, the inner wall of the reducer is a wedge-shaped structure, and the aperture of the reducer decreases proportionally from the outside to the inside; the connecting fixture is used to fix the reducer and the components connected to the reducer.

[0007] Furthermore, the connecting and fixing parts are fastening bolts, a plurality of which are evenly arranged along the circumference of the reducer, and the fastening bolts pass through the reducer, with the ends of the fastening bolts contacting the outer wall of the pipe fitting inserted into the reducer.

[0008] Furthermore, the support mechanism includes a support frame and a first fastening clamp, the support frame is wrapped around the outer wall of the connecting pipe and connected to the exhaust system cover, and the outside of the support frame is locked by the first fastening clamp. The exhaust system cover of the utility model refers to the cabin cover around the exhaust pipe.

[0009] Furthermore, the support frame includes a vertical tube frame and a flat frame, the inner wall of the vertical tube frame is in contact with the outer wall of the connecting pipe, the flat frame is connected to the bottom of the vertical tube frame, and the flat frame is connected to the exhaust system cover via a detachable connector.

[0010] Furthermore, the exhaust gas collection and fixing mechanism includes a fastening part and a vibration-damping bearing part, the fastening part is wrapped around the outer wall of the connecting pipe, and the bottom of the vibration-damping bearing part is connected to the exhaust system cover; the fastening part and the vibration-damping bearing part are connected by a support rod.

[0011] Furthermore, the fastening portion includes an arc-shaped support piece and a second fastening clamp, the inner arc surface of the arc-shaped support piece is in contact with the outer wall of the connecting pipe, and the second fastening clamp locks the arc-shaped support piece and the connecting pipe.

[0012] Furthermore, the vibration-damping bearing part comprises an upper bearing plate, a vibration-damping spring and a lower load-bearing plate which are connected in sequence, and the bottom of the lower load-bearing plate is connected to the exhaust system cover via a detachable connector.

[0013] Furthermore, the detachable connecting member is a detachable strong magnetic suction cup, and a plurality of detachable strong magnetic suction cups are provided between the flat frame / or the lower load-bearing plate and the exhaust system cover.

[0014] The utility model also provides an excavator emission test system, comprising the above exhaust pipe connection structure for emission test.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The exhaust pipe connecting structure of the utility model is adapted to pipes of different axial diameters by arranging a variable diameter connecting mechanism, thereby realizing the function of a set of exhaust pipe connecting pipes matching exhaust pipes of different vehicle models and exhaust collection pipes of emission testing equipment at the same time, reducing the cost of purchasing a large number of exhaust connecting pipes of different specifications and models, while shortening the test preparation time; at the same time, a supporting mechanism is added in the middle of the connecting pipe, solving the problem of poor stability of the existing exhaust pipe connecting pipe without a supporting structure; an exhaust collection fixing mechanism is added at the connection between the exhaust pipe and the emission testing equipment, which has a vibration reduction function, alleviates the shaking problem during the test, and improves the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an exhaust pipe connection structure for emission testing provided by Example 1 of the utility model;

[0018] Figure 2 is a cross-sectional view of the connection between the connecting pipe and the exhaust pipe described in Example 1;

[0019] Figure 3 is a cross-sectional view of the connection between the connecting pipe and the exhaust gas collecting pipe described in Example 1;

[0020] Figure 4 is a schematic structural diagram of the support mechanism described in Example 1;

[0021] Figure 5 It is a structural schematic diagram of the exhaust gas collection and fixing mechanism described in Example 1.

[0022] In the figure: 1. exhaust pipe; 2. variable diameter connecting mechanism; 21. reducing pipe; 22. fastening bolts; 3. exhaust system cover; 4. exhaust collection pipe; 6. supporting mechanism; 61. supporting frame; 611. vertical tube frame; 612. flat frame; 62. first fastening clamp; 7. exhaust collection fixing mechanism; 71. second fastening clamp; 72. arc-shaped support piece; 73. support rod; 74. upper load-bearing plate; 75. shock-absorbing spring; 76. lower load-bearing plate; 8. connecting pipe; 9. removable strong magnetic suction cup. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] Example 1

[0027] This embodiment provides an exhaust pipe connection structure for emission testing, such as Figure 1 As shown, it includes a connecting pipe 8, both ends of which are respectively connected to the exhaust pipe 1 and the exhaust collection pipe 4 through a variable diameter connecting mechanism 2, a supporting mechanism 6 is provided on the side of the middle part of the connecting pipe 8 close to the exhaust pipe 1, and an exhaust collection fixing mechanism 7 is provided on the side close to the exhaust collection pipe 4.

[0028] In this embodiment, the variable diameter connection mechanism 2 includes a reducer 21 and a fastening bolt 22. The reducer 21 is provided at both ends of the connecting pipe 8. The inner wall of the reducer 21 is a wedge-shaped structure. The aperture of the reducer 21 decreases proportionally from the outside to the inside, and can be inserted into the excavator exhaust pipe 1 or the exhaust collection pipe 4 with different axial diameters; Figure 2 and Figure 3 As shown, the outer wall of the reducer 21 is provided with penetrating bolt holes distributed along the circumference of the reducer 21 for the insertion of fastening bolts 22. When the exhaust pipe 1 or the exhaust collection pipe 4 is inserted into the reducer 21, the fastening bolts 22 are screwed in until the end of the fastening bolts 22 contacts the outer wall of the exhaust pipe 1 or the exhaust collection pipe 4.

[0029] like Figure 1 and Figure 4 As shown, in this embodiment, the supporting mechanism 6 includes a supporting frame 61 and a first fastening clamp 62, the supporting frame 61 includes a vertical cylinder frame 611 and a flat frame 612, the vertical cylinder frame 611 is semicircular and symmetrically arranged on the outside of the connecting pipe 8, the inner wall of the vertical cylinder frame 611 is in contact with the outer wall of the connecting pipe 8 and is locked by the first fastening clamp 62; the flat frame 612 is connected to the bottom of the vertical cylinder frame 611, and is connected to the exhaust system cover 3 through a number of detachable strong magnetic suction cups 9.

[0030] like Figure 1 and Figure 5As shown, the exhaust gas collection fixing mechanism 7 of this embodiment includes a fastening part and a vibration-damping bearing part. The fastening part includes an arc-shaped support piece 72 and a second fastening clamp 71. The inner arc surface of the arc-shaped support piece 72 fits the outer wall of the connecting pipe 8. The second fastening clamp 71 locks the arc-shaped support piece 72 and the connecting pipe 8. The fastening part is connected to the vibration-damping bearing part through a support rod 73. The vibration-damping bearing part is a double-layer bearing frame, including an upper bearing plate 74 and a lower bearing plate 76. A vibration-damping spring 75 is arranged between the two layers to play a role in buffering and vibration reduction, alleviate the shaking problem during the test, and improve the test accuracy. The lower bearing plate 76 fixes the bearing frame to the excavator exhaust system cover 3 through a number of detachable strong magnetic suction cups 9.

[0031] Example 2

[0032] This embodiment provides an excavator emission test system, including the exhaust pipe connection structure for emission testing described in Example 1, and other components required for other emission tests. The contents of other components can refer to the prior art and will not be repeated in this utility model.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An exhaust pipe connection structure for emission testing, characterized in that: It comprises a connecting pipe (8), the two ends of which are respectively connected to an exhaust pipe (1) and an exhaust gas collection pipe (4) via a variable diameter connecting mechanism (2); a supporting mechanism (6) is provided on a side of the middle portion of the connecting pipe (8) close to the exhaust pipe (1), and an exhaust gas collection fixing mechanism (7) is provided on a side of the middle portion of the connecting pipe (8) close to the exhaust pipe (4).

2. The exhaust pipe connection structure for emission testing according to claim 1, characterized in that: The variable diameter connection mechanism (2) comprises a variable diameter pipe (21) and a connecting fixture, wherein the variable diameter pipe (21) is arranged at both ends of the connecting pipe (8), the inner wall of the variable diameter pipe (21) is a wedge-shaped structure, and the aperture of the variable diameter pipe (21) decreases proportionally from the outside to the inside; and the connecting fixture is used to fix the variable diameter pipe (21) and a component connected to the variable diameter pipe (21).

3. The exhaust pipe connection structure for emission testing according to claim 2, characterized in that: The connecting fixing member is a fastening bolt (22), a plurality of which are evenly arranged along the circumference of the reducer (21); the fastening bolt (22) passes through the reducer (21), and the end thereof contacts the outer wall of the pipe inserted into the reducer (21).

4. The exhaust pipe connection structure for emission testing according to claim 1, characterized in that: The support mechanism (6) comprises a support frame (61) and a first fastening clamp (62); the support frame (61) is wrapped around the outer wall of the connecting pipe (8) and connected to the exhaust system cover (3); the outside of the support frame (61) is locked by the first fastening clamp (62).

5. The exhaust pipe connection structure for emission testing according to claim 4, characterized in that: The support frame (61) comprises a vertical tube frame (611) and a flat frame (612), the inner wall of the vertical tube frame (611) is in contact with the outer wall of the connecting pipe (8), the flat frame (612) is connected to the bottom of the vertical tube frame (611), and the flat frame (612) is connected to the exhaust system cover (3) via a detachable connecting piece.

6. The exhaust pipe connection structure for emission testing according to claim 1, characterized in that: The exhaust gas collection fixing mechanism (7) comprises a fastening portion and a vibration-damping bearing portion, the fastening portion is wrapped around the outer wall of the connecting pipe (8), and the bottom of the vibration-damping bearing portion is connected to the exhaust system cover (3); the fastening portion and the vibration-damping bearing portion are connected via a support rod (73).

7. The exhaust pipe connection structure for emission testing according to claim 6, characterized in that: The fastening portion comprises an arc-shaped support piece (72) and a second fastening clamp (71), the inner arc surface of the arc-shaped support piece (72) being in contact with the outer wall of the connecting pipe (8), and the second fastening clamp (71) locking the arc-shaped support piece (72) and the connecting pipe (8).

8. The exhaust pipe connection structure for emission testing according to claim 6, characterized in that: The vibration-damping bearing portion comprises an upper bearing plate (74), a vibration-damping spring (75) and a lower bearing plate (76) which are connected in sequence, and the bottom of the lower bearing plate (76) is connected to the exhaust system cover (3) via a detachable connecting piece.

9. The exhaust pipe connection structure for emission testing according to claim 5 or 8, characterized in that: The detachable connecting member is a detachable strong magnetic suction cup (9), and a plurality of detachable strong magnetic suction cups (9) are respectively provided between the exhaust system cover (3) and the flat frame (612) and / or the lower load-bearing plate (76).

10. An excavator emission test system, characterized in that: An exhaust pipe connection structure for emission testing comprising any one of claims 1 to 9.

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