Explosion-proof hydrogen nozzle protection device for multi-point injection

Abstract

The utility model discloses an anti-explosion hydrogen nozzle protection device for multi-point injection, belongs to the technical field of hydrogen engines, and solves the problem that a nozzle is easily damaged by high-pressure gas generated by tempering. The anti-explosion hydrogen nozzle protection device comprises a drainage pipe and a metal net, the middle of the drainage pipe is bent, one end of the drainage pipe is detachably connected with the input end of a nozzle, and the metal net is detachably installed in the drainage pipe. The anti-explosion hydrogen nozzle protection device for multi-point injection plays a role in buffering high-pressure gas generated by tempering, can prevent the nozzle from being damaged, and prolongs the service life of the nozzle.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen engines, and more specifically to an explosion-proof hydrogen nozzle protection device for multi-point injection. Background Art

[0002] However, due to the high activity of hydrogen and its wide flammable boundary, when a hydrogen engine is working, hydrogen can easily enter the intake manifold from the engine cylinder and burn. This phenomenon is referred to as backfire. Backfire can cause automobile engine failure and reduce the service life of the engine. In addition, the high-pressure gas generated by backfire can easily damage the nozzle, which increases maintenance costs and also creates safety hazards for road safety. How to overcome the impact of backfire on the nozzle of the intake pipe injection is a key and difficult point in the field of hydrogen engines. Therefore, it is urgent to develop and design a nozzle protection device. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a multi-point injection explosion-proof hydrogen nozzle protection device for the above-mentioned deficiencies in the prior art, which plays a buffering role for the high-pressure gas generated by the backfire, can avoid damage to the nozzle, and prolong the service life of the nozzle.

[0004] The technical solution of the utility model is as follows: an explosion-proof hydrogen nozzle protection device for multi-point injection, comprising a drainage tube and a metal mesh, wherein the middle portion of the drainage tube is bent, one end of the drainage tube is detachably connected to the input end of the nozzle, and the metal mesh is detachably installed in the drainage tube.

[0005] As a further improvement, the bending angle of the drainage tube is an obtuse angle.

[0006] Furthermore, an external thread is provided on the outer wall surface of the nozzle, a threaded tube is provided at one end of the drainage tube, the external thread is adapted to the internal thread of the threaded tube, and the threaded tube is threadedly connected to the nozzle.

[0007] Furthermore, a sink trough is provided at the other end of the drainage tube, the metal mesh is installed at the bottom of the sink trough, an annular groove is provided in the sink trough, an elastic retaining ring is provided in the annular groove, and the elastic retaining ring presses the metal mesh to the bottom of the sink trough.

[0008] Furthermore, the outer wall of the drainage tube is stepped, and the wall thickness of the drainage tube increases sequentially from an end away from the nozzle to an end close to the nozzle.

[0009] Furthermore, the porosity of the metal mesh is 65%-90%.

[0010] Beneficial Effects

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model discloses an explosion-proof hydrogen nozzle protection device for multi-point injection. The protection device adds a drainage pipe at the input end of the nozzle and installs a metal mesh in the drainage pipe. The diversion and buffering of the metal mesh and the buffering at the bend of the drainage pipe can avoid the high-pressure gas generated by backfire from damaging the nozzle, thereby extending the service life of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A is a schematic diagram of the structure enlargement;

[0015] Figure 3 It is an enlarged schematic diagram of the structure of the sink in the utility model.

[0016] Among them: 1-nozzle, 2-drainage pipe, 3-threaded pipe, 4-metal mesh, 5-sinking groove, 6-annular groove, 7-elastic retaining ring. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0018] See also Figure 1-3 , an explosion-proof hydrogen nozzle protection device for multi-point injection, comprising a drainage tube 2 and a metal mesh 4, the middle part of the drainage tube 2 is bent, one end of the drainage tube 2 is detachably connected to the input end of the nozzle 1, and the metal mesh 4 is detachably installed in the drainage tube 2, and the metal mesh 4 is made of stainless steel material, which is a high-stability metal and will not produce chemical reactions at high temperatures; when installing, first place the metal mesh 4 at the bottom of the sink 5, then use the circlip pliers to install the elastic retaining ring 7 in the annular groove 6, and at the same time press the metal mesh 4 to the bottom of the sink 5, and then connect the drainage tube 2 and the nozzle 1 through a threaded connection When the nozzle 1 and the threaded pipe 3 are threadedly connected, thread glue can be added to the threads, which can well enhance the sealing between the nozzle 1 and the threaded pipe 3; the metal mesh 4 can divert and buffer the high-pressure gas generated by tempering, and can effectively prevent the high-pressure gas from damaging the nozzle 1 or directly damaging the nozzle 1, thereby shortening the service life of the nozzle 1, and effectively saving costs. The protection device reduces the high-pressure gas generated by tempering by adding a drainage pipe 2 and a metal mesh 4 at the output end of the nozzle 1. The two-stage buffer can prevent the high-pressure gas from damaging the nozzle 1 and extend the service life of the nozzle 1.

[0019] In this embodiment, the bending angle of the drainage tube 2 is an obtuse angle. The bending of the drainage tube 2 plays a secondary buffering role on the high-pressure airflow generated by the tempering, which can better prevent the airflow from damaging the nozzle 1; preferably, the bending angle of the drainage tube 2 is 150°. The bending at this angle can maximize the buffering effect on the high-pressure gas generated by the tempering without affecting the flow rate output by the nozzle 1.

[0020] In this embodiment, an external thread is provided on the outer wall surface of the nozzle 1, and a threaded tube 3 is provided at one end of the drainage tube 2. The external thread is adapted to the internal thread of the threaded tube 3. The threaded tube 3 is threadedly connected to the nozzle 1. The nozzle 1 and the drainage tube 2 are threadedly connected. This connection method is convenient for disassembly and installation. When the nozzle 1 and the threaded tube 3 are threadedly connected, thread glue can be added to the threads, which can well enhance the sealing between the nozzle 1 and the threaded tube 3. In other embodiments, the drainage tube 2 and the nozzle 1 can adopt other connection methods, such as the drainage tube 2 and the nozzle 1 are connected by a flange, and a sealing ring is added at the connection to enhance the sealing of the connection.

[0021] In this embodiment, a trough 5 is provided at the other end of the drainage tube 2, and a metal mesh 4 is installed at the bottom of the trough 5. An annular groove 6 is provided in the trough 5, and an elastic retaining ring 7 is provided in the annular groove 6. The elastic retaining ring 7 presses the metal mesh 4 to the bottom of the trough 5; when installing the metal mesh 4, the metal mesh 4 is placed at the bottom of the trough 5, and then the elastic retaining ring 7 is installed in the annular groove 6 using circlip pliers, and the metal mesh 4 is pressed to the bottom of the trough 5 at the same time; the metal mesh 4 can play a role of diversion and buffering for the high-pressure gas generated by tempering, which can effectively prevent the high-pressure gas from damaging the nozzle 1 or directly damaging the nozzle 1, thereby shortening the service life of the nozzle 1, and effectively saving costs.

[0022] In this embodiment, the outer wall of the drainage tube 2 is stepped, and the wall thickness of the drainage tube 2 increases from the end farthest from the nozzle 1 to the end close to the nozzle 1. By increasing the wall thickness of the drainage tube 2, the overall structural strength of the drainage tube 2 is improved, thereby increasing the gas pressure that the drainage tube 2 can withstand, thereby preventing the drainage tube 2 from being damaged by high-pressure gas and causing gas leakage in the drainage tube 2.

[0023] In this embodiment, the porosity of the metal mesh 4 is 65%-90%, and the diameter of the metal wire constituting the metal mesh 4 is 0.3mm-0.5mm, which can effectively divert and buffer the high-pressure airflow generated by tempering, and can effectively prevent the high-pressure gas from damaging the nozzle 1 or directly damaging the nozzle 1, thereby shortening the service life of the nozzle 1, and effectively saving costs.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An explosion-proof hydrogen nozzle protection device for multi-point injection, characterized in that: It comprises a drainage tube (2) and a metal mesh (4); the middle part of the drainage tube (2) is bent; one end of the drainage tube (2) is detachably connected to the input end of the nozzle (1); and the metal mesh (4) is detachably installed in the drainage tube (2).

2. The explosion-proof hydrogen nozzle protection device for multi-point injection according to claim 1, characterized in that: The bending angle of the drainage tube (2) is an obtuse angle.

3. The explosion-proof hydrogen nozzle protection device for multi-point injection according to claim 1, characterized in that: The outer wall surface of the nozzle (1) is provided with an external thread, and one end of the drainage tube (2) is provided with a threaded tube (3), the external thread is adapted to the internal thread of the threaded tube (3), and the threaded tube (3) is threadedly connected to the nozzle (1).

4. The explosion-proof hydrogen nozzle protection device for multi-point injection according to claim 1, characterized in that: A sink groove (5) is provided at the other end of the drainage pipe (2), the metal mesh (4) is installed at the bottom of the sink groove (5), an annular groove (6) is provided in the sink groove (5), an elastic retaining ring (7) is provided in the annular groove (6), and the elastic retaining ring (7) presses the metal mesh (4) against the bottom of the sink groove (5).

5. The explosion-proof hydrogen nozzle protection device for multi-point injection according to claim 1, characterized in that: The outer wall of the drainage tube (2) is in a stepped shape, and the wall thickness of the drainage tube (2) increases sequentially from an end away from the nozzle (1) to an end close to the nozzle (1).

6. The explosion-proof hydrogen nozzle protection device for multi-point injection according to claim 1, characterized in that: The porosity of the metal mesh (4) is 65%-90%.

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