CN207528451U - A kind of tailpipe attachment device for engine rig test - Google Patents

Abstract

An exhaust tailpipe connection device for engine bench tests, including a connecting middle pipe, connecting bolts, tightening nuts, clamping plates, and fastening rings. The connecting middle pipe is a tapered pipe with a small middle end and large ends , the outer walls of the nozzles at both ends of the connecting pipe are provided with multiple connecting plates, and each connecting plate is connected to a connecting bolt and a clamping plate; when connecting, the other end of the connecting bolt is tightened by tightening the nut It is fixed on the fastening plate, and the fastening ring is screwed on the outer circle formed by the outer walls of a plurality of clamping plates. Through the implementation of the utility model, the exhaust tailpipe that needs to be tested can be installed quickly and conveniently, and the connecting middle pipe in the utility model is provided with a multi-step circular groove, so that the device can adapt to various types of engines The diameter of the exhaust pipe and the test object can greatly improve the efficiency of the test and shorten the product development cycle.

Description

An exhaust tailpipe connection device for engine bench test

technical field

The utility model belongs to the field of engine research and development, in particular to an exhaust tailpipe connection device used for engine bench tests.

Background technique

At present, in the engine bench test, most of the special benches will be equipped with special connectors. When conducting tests on different objects, new connectors may be designed and replaced, resulting in poor versatility, prolonging the test cycle and improving processing. cost. When studying the effects of an additional exhaust tailpipe on engine power, fuel economy and emission indicators, it is necessary to quickly and effectively install the additional exhaust tailpipe behind the original exhaust pipe of the engine. It is required to have high air tightness, stability and convenient disassembly and assembly performance. At present, the method of installing the exhaust tailpipe is to weld the flange with mounting holes and thread the connection. Each time, multiple threads need to be tightened to ensure airtightness and stability. The workload is heavy and you need to wait after the experiment is over. After the exhaust pipe has cooled down, it can be disassembled, and then a new test object can be installed. Moreover, when carrying out new exhaust tailpipe tests for different types of engines, new flange connection plates need to be welded, which is extremely inconvenient. In addition, after the experiment is completed, the welded flanges of the original engine exhaust pipes are difficult to disassemble. The appearance has a great influence and is extremely unfavorable for repeated use.

Chinese patent (publication number: CN203420769U) discloses a tailpipe connection mechanism with O-ring screw fastening, this mechanism is mainly used to connect exhaust tailpipe and muffler, using a plurality of semicircular screw holes to match The connection of the exhaust pipe is carried out in this way. This connection method is only suitable for the case where the diameter difference of the tail pipe is not large, and the exhaust tail pipe will be squeezed during the fastening process. Once the tail pipe of the exhaust pipe is deformed, It will greatly affect the effect of the sealed connection.

Utility model content

In order to solve the above-mentioned technical problems, the utility model provides an exhaust tailpipe connection device used for engine bench tests.

The utility model is realized through the following technical solutions.

The utility model provides an exhaust tailpipe connection device for engine bench test, which includes a connecting middle pipe, connecting bolts, tightening nuts, clamping plates, and fastening rings. The connecting middle pipe is the middle end and the small two ends For large tapered tubes, there are multiple connecting plates on the outer walls of the nozzles at both ends of the middle tube, and each connecting plate is connected to a connecting bolt and a clamping plate; the clamping plate is conical, clamping The bottom of the outer wall of the plate is provided with a fastening plate, and the outer side of the clamping plate is provided with external threads; the inner wall of the fastening ring is provided with internal threads that match the external threads of the clamping plate; when connecting, the other end of the connecting bolt passes through the upper The tightening nut is fastened on the fastening plate, and the fastening ring is screwed on the outer circle formed by the outer walls of a plurality of clamping plates.

The connecting plate is provided with a connecting hole, and a connecting pin is arranged in the hole, and the connecting pin passes through the connecting bolt to fix the connecting bolt on the connecting plate, and the connecting bolt can rotate with the connecting pin as an axis.

The inner two ports of the connecting middle pipe are provided with stepped round grooves, the diameter of the round groove near the port of the connecting middle pipe is 46mm, and the stepped round grooves extend to the inside of the connecting middle pipe for multiple stages, each time extending inward In the first level, the diameter of the circular groove is reduced by 2mm compared with the previous level.

The inner side of the clamping plate is provided with anti-slip stripes.

The outer wall of the fastening ring is provided with a plurality of fastening handles.

The internal diameter of the fastening ring is 50mm and the external diameter is 58mm.

The number of the connecting boards is 3-5.

The fastening plate is provided with a fastening installation hole, and when connecting, the connecting bolt passes through the fastening installation hole and is connected with the tightening nut.

The beneficial effects of the utility model are: through the implementation of the utility model, a quick plug-in device is provided at both ends of the connecting pipe, which can quickly and conveniently install the exhaust tailpipe that needs to be tested, and the connection in the utility model The middle pipe is provided with multi-level stepped circular grooves, so that the device can adapt to the diameters of various types of engine exhaust pipes and experimental objects, which can greatly improve the efficiency of the test and shorten the product development cycle. In addition, the structure of the utility model It is simple and has good airtightness after installation, and can be popularized and used in various tests that require tubular connections.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the half-section structure of the connecting pipe of the present invention;

Fig. 3 is a structural schematic diagram of the clamping plate of the present invention;

In the figure: 1-connecting middle pipe, 11-connecting plate, 111-connecting hole, 112-connecting pin, 12-step circular groove, 2-connecting bolt, 3-tightening nut, 4-clamping plate, 41-tightening Fixed plate, 411-fastening mounting hole, 5-fastening ring, 51-fastening handle.

Detailed ways

The technical solution of the utility model is further described below, but the scope of protection is not limited to the description.

As shown in Figures 1-3, an exhaust tailpipe connection device for engine bench tests, including a connecting middle pipe 1, a connecting bolt 2, a tightening nut 3, a clamping plate 4, and a fastening ring 5, The connecting middle pipe 1 is a tapered pipe with a small middle end and a large two ends, and a plurality of connecting plates 11 are arranged on the outer walls of the nozzles at both ends of the connecting middle pipe 1, and each connecting plate 11 is correspondingly connected with a connecting bolt and a Clamping plate 4; Clamping plate 4 is conical, and the outer wall bottom of clamping plate 4 is provided with fastening plate 41, and the outside of clamping plate 4 is provided with external thread; The inner wall of fastening ring 5 is provided with and clamping plate 4. The internal thread matched with the external thread; when connecting, the other end of the connecting bolt 2 is fastened on the fastening plate 41 through the tightening nut 3, and the fastening ring 5 is screwed on the outer wall of a plurality of clamping plates 4. on the outer circle.

The connecting plate 11 is provided with a connecting hole 111, and a connecting pin 112 is arranged in the hole. The connecting pin 112 passes through the connecting bolt 2 to fix the connecting bolt 2 on the connecting plate 11. The connecting bolt 2 can be rotated on the connecting pin 112 as an axis. . The connection between the connecting bolt 2 and the connecting plate 11 is set in a rotatable connection form, which is convenient for adjusting the installation position of the jet pipe tail pipe in the test, and it is not necessary to carry out the jet pipe tail pipe and the test engine tail pipe on the same straight line. The connection is more convenient for testing.

The inner two ports of the connecting middle pipe 1 are provided with stepped round grooves 12, the diameter of the round grooves near the ports of the connecting middle pipe 1 is 46mm, and the stepped round grooves 12 extend more to the inside of the connecting middle pipe 1 Level, every time one level is extended inward, the diameter of the circular groove is reduced by 2mm compared with the previous level. The multi-stage stepped circular grooves are arranged to facilitate the connection of engine tailpipes of various sizes, which greatly enhances the universal applicability of the utility model.

The inner side of the clamping plate 4 is provided with anti-slip stripes. The anti-slip stripes are one of herringbone stripes, V-shaped stripes, herringbone stripes, oblique straight stripes and horizontal straight stripes. By arranging the anti-slip stripes, it can play the role of fastening the tailpipe of the jet pipe on the inner wall of the clamping plate 4, preventing it from falling off due to the effect of the air flow during the test, and affecting the normal progress of the test.

The outer wall of the fastening ring 5 is provided with a plurality of fastening handles 51 . Disassembling the fastening ring through the fastening handle 51 can increase the torque of the fastening ring 5 during tightening, making the fastening more firm. In addition, it can also prevent people from directly tightening the exhaust pipe due to excessive temperature. The case of the fastening ring occurs.

The inner diameter of the fastening ring 5 is 50mm, and the outer diameter is 58mm.

The number of the connecting plates 11 is 3-5.

The fastening plate 41 is provided with a fastening installation hole 411 , and when connecting, the connecting bolt 2 passes through the fastening installation hole 411 and cooperates with the tightening nut 3 to connect.

During specific implementation, there are three fastening handles 51 arranged on the outer wall of the fastening ring 5, and three connecting plates 11 are arranged at both ends of the connecting middle pipe 1, and each connecting plate 11 is connected to a clamping plate 4; During installation, put the exhaust tailpipe to be tested into one end of the connecting pipe 1 and tighten the fastening ring 5 through the fastening handle 51, so that the clamping plate 4 at this end clamps the exhaust tailpipe to be tested, and then put this Tighten the tightening nut 3 at the end, and press the exhaust tail pipe to be tested toward the direction of the connecting middle pipe 1 to complete the connection, and then connect the engine exhaust pipe at the other end of the connecting middle pipe 1 in the same way, and the test is completed Finally, unscrew the tightening nut 3 first, and then unscrew the tightening rings 5 at both ends through the tightening handle 51, so that the clamping plate 4 releases the fastening of the exhaust tail pipe and the engine exhaust pipe of the test, Take out the test exhaust tailpipe and the exhaust pipe of the engine.

Through the implementation of the utility model, a quick plug-in device is provided at both ends of the connecting middle pipe, which can quickly and conveniently install the exhaust tailpipe that needs to be tested, and the connecting middle pipe in the utility model is provided with multiple steps The circular groove enables the device to adapt to the calibers of various types of engine exhaust pipes and experimental objects, which can greatly improve the efficiency of the test and shorten the product development cycle. In addition, the utility model has a simple structure and good air tightness after installation. , which can be popularized and used in various tests that require tubular connections.

Claims (8)

1. a kind of tailpipe attachment device for engine rig test, it is characterised in that：Including connection middle pipe (1), even Connecting bolt (2) tightens nut (3), grip block (4), tight loop (5), and connection middle pipe (1) is the big conical pipe in the small both ends of middle-end, Multiple connecting plates (11) are equipped at the outer wall of the both ends nozzle of connection middle pipe (1), each connecting plate (11) is correspondingly connected with One connection bolt and a grip block (4)；Grip block (4) is cone, and the outer wall bottom of grip block (4) is equipped with fastening plates (41), the outside of grip block (4) is equipped with external screw thread；The inner wall of tight loop (5) is equipped with matched interior with grip block (4) external screw thread Screw thread；When being attached, the other end of connection bolt (2) is anchored on by tightening nut (3) in fastening plates (41), tight loop (5) it is tightened in the outer circle of outer wall composition of multiple grip blocks (4).

2. it to be used for the tailpipe attachment device of engine rig test as described in claim 1, it is characterised in that：The company Fishplate bar (11) is equipped with connecting hole (111), and connecting pin (112) is provided in hole, and connecting pin (112) will across connection bolt (2) Connection bolt (2) is fixed on connecting plate (11), and connection bolt (2) can be rotated with connecting pin (112) for axis.

3. it to be used for the tailpipe attachment device of engine rig test as described in claim 1, it is characterised in that：The company It connects and ladder circular groove (12) is equipped at the inside two-port of middle pipe (1), ladder circular groove (12) is at the port of connection middle pipe (1) The a diameter of 46mm of circular groove, the internal stretch of ladder circular groove (12) to connection middle pipe (1) is multistage, and per level-one is extended inside, circular groove is straight Diameter reduces 2mm compared with upper level.

4. it to be used for the tailpipe attachment device of engine rig test as described in claim 1, it is characterised in that：The folder The inside for holding plate (4) is equipped with skid resistance strip.

5. it to be used for the tailpipe attachment device of engine rig test as described in claim 1, it is characterised in that：It is described tight The outer wall of Gu Quan (5) is equipped with multiple fastening handles (51).

6. it to be used for the tailpipe attachment device of engine rig test as described in claim 1, it is characterised in that：It is described tight The inside diameter of Gu Quan (5) is 50mm, outer dia 58mm.

7. it to be used for the tailpipe attachment device of engine rig test as described in claim 1, it is characterised in that：The company The quantity of fishplate bar (11) is 3-5.

8. it to be used for the tailpipe attachment device of engine rig test as described in claim 1, it is characterised in that：It is described tight Solid plate (41) is equipped with fastening mounting hole (411), and when being attached, connection bolt (2) is across fastening mounting hole (411) with tightening Nut (3) is connected.