Air guide pipe for starting engine

Abstract

The utility model relates to the technical field of gas-guide tubes, in particular to a gas-guide tube for starting an engine. The air tightness detection device comprises an air guide pipe, a branch pipe and a round hole, the branch pipe is welded to the round hole in the air guide pipe, an auxiliary drilling assembly and an air tightness detection assembly are arranged on the arc surface of the air guide pipe, and the auxiliary drilling assembly comprises two identical circular rings connected to the arc surface of the air guide pipe in a sliding mode. A perforated plate and a rubber block are fixedly connected between the two circular rings, a limiting rod is fixedly connected to the front face of the perforated plate, and an auxiliary plate is slidably connected to the arc face of the limiting rod. However, the problems that a round hole in the middle of an original air guide pipe is machined, for example, a worker holds an electric drill by hand to enable a drill bit to drill the air guide pipe, in the drilling process, the drill bit deviates, the forming effect of the round hole is poor, and the production efficiency is extremely low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air guide pipes, in particular to an engine starting air guide pipe. Background Art

[0002] The air duct consists of an air duct body and a branch pipe. When using air to start the engine, multiple air compressors are started, allowing the gas to enter the air motor through the air duct and the branch pipe, pushing the gear connected to the drive air motor and the engine starting gear to engage. The compressed air then drives the turbine blades to rotate, thereby causing the gear connected to the air motor to rotate, driving the engine starting gear to rotate, and then starting the engine.

[0003] The inventor discovered in his daily work that during the processing of the air duct, since there were branch pipes on the air duct, it was necessary to drill holes on the main pipe for connection. However, the circular hole in the middle of the original air duct was machined. For example, a worker held an electric drill and let the drill drill a hole in the air duct. During the drilling process, the drill bit was offset, which resulted in poor forming effect of the circular hole and extremely low production efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that in actual use, since there are branch pipes on the air guide pipe, it is necessary to drill holes on the main pipe for connection, but the circular hole in the middle of the original air guide pipe is processed by machinery, such as a worker holding an electric drill and letting the drill drill the air guide pipe. During the drilling process, the drill is offset, thereby making the forming effect of the circular hole poor and the production efficiency extremely low. An engine starting air guide pipe is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an air duct, comprising an air duct, a branch pipe and a circular hole, the branch pipe being welded to the circular hole on the air duct, the arc surface of the air duct being provided with an auxiliary drilling assembly and an air tightness detection assembly, the auxiliary drilling assembly comprising two identical circular rings slidably connected to the arc surface of the air duct, a perforated plate and a rubber block being fixedly connected between the two circular rings, a limiting rod being fixedly connected to the front side of the perforated plate, an auxiliary plate being slidably connected to the arc surface of the limiting rod, and an auxiliary hole being provided on the front side of the auxiliary plate.

[0006] The effect achieved by the above components is: by setting up the auxiliary drilling assembly, when drilling the auxiliary air duct, the worker holds the electric drill and inserts the drill bit into the auxiliary hole on the auxiliary plate, and one end of the electric drill head is also stuck in the auxiliary hole. The worker presses the electric drill to move the limit rod of the auxiliary plate on the perforated plate, thereby ensuring that the drill bit does not deviate when drilling the hole, thereby ensuring the drilling effect, and at the same time, the ring can be moved to the part of the air duct that needs to be protected, so that the rubber block can provide protection.

[0007] Preferably, a spring is fixedly connected to the lower end of the auxiliary plate, and the other end of the spring is fixed to the perforated plate.

[0008] The effect achieved by the above components is: the auxiliary plate is reset by setting a spring.

[0009] Preferably, a screw rod is inserted into the arc surface thread of the circular ring, and a plurality of screw rods are provided.

[0010] The effect achieved by the above components is: the screw rod is twisted so that the screw rod is squeezed onto the air guide tube to fix the ring.

[0011] Preferably, the spring sleeve is arranged on the arc surface of the limiting rod, and the plurality of screw rods are evenly distributed on the circular ring.

[0012] The effect achieved by the above components is: the ring is further fixed by arranging a plurality of screw rods.

[0013] Preferably, the air tightness detection component includes a pair of semicircular rings 1 and 2 which are slidably connected to the arc surface of the airway tube, the arc surfaces of the two semicircular rings 2 are provided with mounting holes, the inner walls of the mounting holes are provided with phenolphthalein test paper, and the semicircular rings 1 and 2 are connected by means of a hinge.

[0014] The effect achieved by the above components is: when it is necessary to test the air tightness of the branch pipe welded to the air duct, the air duct is laid flat, and then one end is sealed with a rubber plug, and then semicircular ring one and semicircular ring two are installed at the welding position, so that the phenolphthalein test paper is close to the welding position, and alkaline gas is introduced from the other end, so that there is a gap in the welding position and leakage, and then it comes into contact with the phenolphthalein test paper, making the phenolphthalein test paper turn red, thereby there is a gap between the branch pipe and the air duct and needs to be re-welded.

[0015] Preferably, a plurality of the phenolphthalein test papers are provided, and the plurality of the phenolphthalein test papers are fixed on the inner wall of the mounting hole.

[0016] The effect achieved by the above components is: by arranging a plurality of phenolphthalein test papers, the position of the phenolphthalein test papers that turn red is used to locate the gap.

[0017] Preferably, a baffle is provided between the two phenolphthalein test papers, and the baffle is fixed to the semicircular ring 2.

[0018] The effect achieved by the above components is: by setting the baffle, interference between phenolphthalein test papers is avoided.

[0019] Preferably, a rectangular groove is provided on one side of the semicircular ring 1, and a rectangular block is fixedly connected to one side of the semicircular ring 2.

[0020] The effect achieved by the above components is: when the semicircular ring one and the semicircular ring two need to be fixed, the rectangular block is inserted into the rectangular groove, and the semicircular ring one and the semicircular ring two are fixed through the protrusions in the rectangular groove.

[0021] In summary, the beneficial effects of the utility model are:

[0022] In the utility model, an auxiliary drilling assembly is provided. When drilling a hole in the auxiliary air duct, a worker holds an electric drill and inserts the drill bit into the auxiliary hole on the auxiliary plate. One end of the electric drill head is also stuck in the auxiliary hole. The worker presses the electric drill to move the limit rod of the auxiliary plate on the plate with holes, thereby ensuring that the drill bit does not deviate when drilling the hole, thereby ensuring the effect of drilling. At the same time, the circular ring can be moved to the part of the air duct that needs to be protected, so that the rubber block can be used for protection. This solves the problem that there is a branch pipe on the air duct, so it is necessary to drill a hole on the main pipe for connection, but the circular hole in the middle of the original air duct is machined. For example, a worker holds an electric drill and lets the drill bit drill a hole in the air duct. During the drilling process, the drill bit deviates, thereby resulting in a poor forming effect of the circular hole and extremely low production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the auxiliary drilling assembly used in the utility model;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the auxiliary drilling assembly of the utility model from another angle;

[0025] Figure 3 This is a three-dimensional structural diagram of the airtightness detection component used in the utility model;

[0026] Figure 4 It is a three-dimensional structural schematic diagram of the airtightness detection component of the utility model from another angle.

[0027] Legend: 1. Air guide tube; 2. Auxiliary drilling assembly; 3. Air tightness detection assembly; 4. Round hole; 5. Branch pipe; 21. Round ring; 22. Plate with holes; 23. Limit rod; 24. Auxiliary plate; 25. Auxiliary hole; 26. Spring; 27. Screw rod; 28. Rubber block; 31. Semicircular ring one; 32. Semicircular ring two; 33. Mounting hole; 34. Phenolphthalein test paper; 35. Baffle; 36. Rectangular groove; 37. Rectangular block. DETAILED DESCRIPTION

[0028] Reference Figure 1 and Figure 3 As shown, the utility model provides a technical solution: an engine starting air duct includes an air duct 1, a branch pipe 5 and a circular hole 4, the branch pipe 5 is welded to the circular hole 4 on the air duct 1, and the arc surface of the air duct 1 is provided with an auxiliary drilling component 2 and an air tightness detection component 3.

[0029] The specific configuration and functions of the auxiliary drilling component 2 and the air tightness detection component 3 are described in detail below.

[0030] Reference Figure 1 and Figure 2 As shown, in this embodiment: the auxiliary drilling assembly 2 includes two identical circular rings 21 slidably connected to the arc surface of the air guide tube 1, a perforated plate 22 and a rubber block 28 are fixedly connected between the two circular rings 21, a limiting rod 23 is fixedly connected to the front of the perforated plate 22, an auxiliary plate 24 is slidably connected to the arc surface of the limiting rod 23, and an auxiliary hole 25 is opened on the front of the auxiliary plate 24. By setting the auxiliary drilling assembly 2, when drilling the auxiliary air guide tube 1, the worker holds the electric drill so that the drill bit is inserted into the auxiliary hole 25 on the auxiliary plate 24, and one end of the electric drill head is also stuck in the auxiliary hole 25. The worker presses the electric drill to move the limiting rod 23 on the perforated plate 22, thereby ensuring that the drilling The drilling head does not deviate, thereby ensuring the drilling effect. At the same time, the ring 21 can be moved to the part of the air guide tube 1 that needs to be protected, so that the rubber block 28 can be protected. The lower end of the auxiliary plate 24 is fixedly connected with a spring 26, and the other end of the spring 26 is fixed to the perforated plate 22. By setting the spring 26, the auxiliary plate 24 is reset. The arc surface of the ring 21 is threaded with a screw rod 27, and there are multiple screw rods 27. The screw rods 27 are twisted so that the screw rods 27 are squeezed into the air guide tube 1 to fix the ring 21. The spring 26 is sleeved on the arc surface of the limit rod 23, and multiple screw rods 27 are evenly distributed on the ring 21. By setting multiple screw rods 27, the ring 21 is further fixed.

[0031] Reference Figure 3 and Figure 4As shown, in this embodiment: the air tightness detection component 3 includes a pair of semicircular rings 1 31 and a semicircular ring 2 32 slidably connected to the arc surface of the air guide tube 1, the arc surfaces of the two semicircular rings 2 32 are provided with mounting holes 33, the inner walls of the mounting holes 33 are provided with phenolphthalein test paper 34, the semicircular rings 1 31 and the semicircular rings 2 32 are connected by hinges, when it is necessary to weld the branch pipe 5 to the air guide tube 1 for air tightness detection, the air guide tube 1 is laid flat, and then one end is sealed with a rubber plug, and then the semicircular rings 1 31 and the semicircular rings 2 32 are installed at the welding position, so that the phenolphthalein test paper 34 is close to the welding position, and alkaline gas is introduced from the other end, so that there is a gap in the welding position to leak out, and then it contacts with the phenolphthalein test paper 34, so that the phenolphthalein test paper 34 turns red, thereby the branch pipe 5 is welded. There is a gap in the airway 1 and it needs to be re-welded. A plurality of phenolphthalein test papers 34 are provided, and the plurality of phenolphthalein test papers 34 are fixed on the inner wall of the mounting hole 33. By providing a plurality of phenolphthalein test papers 34, the position of the reddened phenolphthalein test papers 34 is used to locate the gap. A baffle 35 is provided between two phenolphthalein test papers 34, and the baffle 35 is fixed to the semicircular ring 2 32. By providing the baffle 35, interference between the phenolphthalein test papers 34 is avoided. A rectangular groove 36 is provided on one side of the semicircular ring 1 31, and a rectangular block 37 is fixedly connected to one side of the semicircular ring 2 32. When the semicircular ring 1 31 and the semicircular ring 2 32 need to be fixed, the rectangular block 37 is inserted into the rectangular groove 36, and the semicircular ring 1 31 and the semicircular ring 2 32 are fixed by the protrusion in the rectangular groove 36.

[0032] Working principle:

[0033] When using air to start a military engine, multiple air compressors are started, allowing gas to enter the air motor through the air duct 1 and the branch pipe 5, pushing the gear connected to the driving air motor to engage with the engine starting gear, and then the compressed air drives the turbine blades to rotate, thereby causing the gear connected to the air motor to rotate, driving the engine starting gear to rotate, and then starting the engine. When drilling a hole in the auxiliary air duct 1, the worker holds an electric drill and inserts the drill bit into the auxiliary hole 25 on the auxiliary plate 24. One end of the electric drill head is also stuck in the auxiliary hole 25. The worker presses the electric drill to move the limit rod 23 of the auxiliary plate 24 on the perforated plate 22, thereby ensuring that the drill bit does not deviate when drilling the hole, thereby ensuring the drilling effect. At the same time, the movable ring 21 can be moved to the part of the air duct 1 that needs to be protected, so that the rubber block 28 can provide protection. By setting the spring 26, the auxiliary plate 24 is reset, and the screw rod 27 is turned so that the screw rod 27 is squeezed into the air duct 1 to The ring 21 is fixed, and the circular ring 21 is further fixed by setting a plurality of screw rods 27. When it is necessary to weld the branch pipe 5 to the air guide pipe 1 for air tightness detection, the air guide pipe 1 is laid flat, and then one end is sealed with a rubber plug, and then the semicircular ring 1 31 and the semicircular ring 2 32 are installed at the welding position, so that the phenolphthalein test paper 34 is close to the welding position, and alkaline gas is introduced from the other end to make a gap leak out of the welding position, and then contact with the phenolphthalein test paper 34 to make the phenolphthalein test paper 34 turn red, so that the branch pipe 5 is welded to the air guide pipe 1 There is a gap and needs to be re-welded, by setting a plurality of phenolphthalein test papers 34, the reddened phenolphthalein test papers 34 are positioned at the gap, and by setting a baffle 35, interference between the phenolphthalein test papers 34 is avoided, and when it is necessary to fix the semicircular ring 1 31 and the semicircular ring 2 32, the rectangular block 37 is inserted into the rectangular groove 36, and the semicircular ring 1 31 and the semicircular ring 2 32 are fixed by the protrusion in the rectangular groove 36.

[0034] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.

Claims

1. An engine starting air duct, comprising an air duct (1), a branch pipe (5) and a circular hole (4), wherein the branch pipe (5) is welded to the circular hole (4) on the air duct (1), and characterized in that: The arc surface of the air guide tube (1) is provided with an auxiliary drilling assembly (2) and an air tightness detection assembly (3); the auxiliary drilling assembly (2) comprises two identical circular rings (21) slidably connected to the arc surface of the air guide tube (1); a perforated plate (22) and a rubber block (28) are fixedly connected between the two circular rings (21); a limiting rod (23) is fixedly connected to the front face of the perforated plate (22); an auxiliary plate (24) is slidably connected to the arc surface of the limiting rod (23); and an auxiliary hole (25) is provided on the front face of the auxiliary plate (24).

2. The engine starting air duct according to claim 1, characterized in that: The lower end of the auxiliary plate (24) is fixedly connected to a spring (26), and the other end of the spring (26) is fixed to the perforated plate (22).

3. The engine starting air duct according to claim 2, characterized in that: A screw rod (27) is inserted into the circular arc surface thread of the circular ring (21), and a plurality of screw rods (27) are provided.

4. The engine starting air duct according to claim 3, characterized in that: The spring (26) is sleeved on the arc surface of the limiting rod (23), and the plurality of screw rods (27) are evenly distributed on the circular ring (21).

5. The engine starting air duct according to claim 4, characterized in that: The air tightness detection assembly (3) comprises a pair of semicircular rings 1 (31) and 2 (32) slidably connected to the arc surface of the air guide tube (1); the arc surfaces of the two semicircular rings 2 (32) are provided with mounting holes (33); the inner walls of the mounting holes (33) are provided with phenolphthalein test papers (34); and the semicircular rings 1 (31) and 2 (32) are connected by means of a hinge.

6. The engine starting air duct according to claim 5, characterized in that: A plurality of phenolphthalein test papers (34) are provided, and the plurality of phenolphthalein test papers (34) are fixed on the inner wall of the mounting hole (33).

7. The engine starting air duct according to claim 6, characterized in that: A baffle (35) is provided between the two phenolphthalein test papers (34), and the baffle (35) is fixed to the second semicircular ring (32).

8. The engine starting air duct according to claim 7, characterized in that: A rectangular groove (36) is provided on one side of the semicircular ring 1 (31), and a rectangular block (37) is fixedly connected to one side of the semicircular ring 2 (32).

Images