CN217270549U - Pre-combustion chamber air inlet pipe and engine - Google Patents

Abstract

The utility model belongs to the technical field of the engine, a precombustion chamber intake pipe and engine is disclosed, precombustion chamber intake pipe include check valve, first intake pipe section and second intake pipe section. The first air inlet pipe section is provided with a first air inlet channel penetrating through the first air inlet pipe section along a first direction, the first air inlet channel comprises a check valve installation section and an air inlet section, the check valve installation section is arranged at the first end of the first air inlet pipe section, the air inlet section is arranged at the second end of the first air inlet pipe section, the check valve installation section is communicated with the air inlet section and is coaxially arranged, the check valve is arranged in the check valve installation section and is in interference fit with the wall of the check valve installation section, and the diameter of the air inlet section is larger than that of the check valve. The first end of the second air inlet pipe section is in threaded connection with the second end of the first air inlet pipe section, a second air inlet channel penetrating through the second air inlet pipe section along the first direction is arranged on the second air inlet pipe section, and the second air inlet channel is communicated with the first air inlet channel. The utility model discloses a precombustion chamber intake pipe has avoided the check valve incline to lead to the condemned condition of precombustion chamber intake pipe.

Description

Pre-combustion chamber air inlet pipe and engine

Technical Field

The utility model relates to the technical field of engines, especially, relate to a precombustion chamber intake pipe and engine.

Background

With the wide application and the increasingly tightening energy supply of petroleum energy, natural gas is used as clean energy capable of replacing petroleum, and the application occasions are increasing. With the continuous upgrading of the technical route of the natural gas engine and the gradual improvement of the lean burn boundary, passive air intake type pre-combustion chamber spark plug ignition, active air intake type pre-combustion chamber ignition technology and the like appear. The active air inlet type precombustion chamber ignition technology not only improves the fuel economy of the engine, but also improves the combustion consistency of each cylinder of the engine, and brings great benefits to the stable operation of the engine. The pre-combustion chamber air inlet pipe is an important part for communicating a gas pipeline with the pre-combustion chamber, a one-way valve is arranged in the pre-combustion chamber air inlet pipe, the one-way valve needs to be placed from the air inlet end of the pre-combustion chamber air inlet pipe when being installed, slides into the air outlet end by means of self gravity, and then is pressed and installed through a pressure device. The check valve body is small in size, the pipeline is long in the sliding-in process, the single-way valve collides with the pipe body when reaching the bottom, the check valve is prone to deflection, the specific position of the check valve cannot be observed by an operator due to the length of the air inlet pipe of the precombustion chamber, manual adjustment cannot be carried out, the mounting state of the check valve cannot meet the design requirement after press mounting, and the check valve and the air inlet pipe of the precombustion chamber are in interference fit, so that the air inlet pipe of the precombustion chamber is scrapped integrally if the check valve is not mounted in place. In addition, when the air inlet pipe of the precombustion chamber is used, any part of the air inlet pipe of the precombustion chamber is damaged and can only be discarded integrally, so that the maintenance cost of the air inlet pipe of the precombustion chamber is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prechamber intake pipe and engine avoids the one-way valve position incline to lead to the condemned condition of pressure equipment back prechamber intake pipe to reduce cost of maintenance.

To achieve the purpose, the utility model adopts the following technical proposal:

a prechamber air inlet duct comprising:

a one-way valve;

the first air inlet pipe section is provided with a first air inlet channel penetrating through the first air inlet pipe section along a first direction, the first air inlet channel comprises a one-way valve mounting section arranged at a first end of the first air inlet pipe section and an air inlet section arranged at a second end of the first air inlet pipe section, the one-way valve mounting section is communicated with the air inlet section and is coaxially arranged, the one-way valve is arranged in the one-way valve mounting section and is in interference fit with the cavity wall of the one-way valve mounting section, and the diameter of the air inlet section is larger than that of the one-way valve;

and the first end of the second air inlet pipe section is in threaded connection with the second end of the first air inlet pipe section, the second air inlet pipe section is provided with a second air inlet channel which penetrates through the second air inlet pipe section along the first direction, and the second air inlet channel is communicated with the first air inlet channel.

Preferably, the first air inlet channel further comprises a limiting section coaxially arranged with the one-way valve installation section, the limiting section is arranged on one side, away from the air inlet section, of the one-way valve installation section, and the diameter of the limiting section is smaller than that of the one-way valve installation section.

Preferably, the second air inlet pipe section is coaxially arranged with the first air inlet pipe section, and the second air inlet channel is coaxially arranged with the air inlet section.

Preferably, the end of the first air inlet pipe section is provided with a first sealing spherical surface surrounding the air outlet of the first air inlet channel.

Preferably, the outer wall of the second end of the second air inlet pipe section is convexly provided with a limiting bulge.

Preferably, the air inlet pipe further comprises a sealing ring, a sealing groove extending along the circumferential direction of the second air inlet pipe section is formed in the outer wall of the second air inlet pipe section, the sealing ring is sleeved in the sealing groove, and the sealing ring is partially exposed out of the sealing groove.

Preferably, the air inlet pipe comprises a first air inlet pipe section and a second air inlet pipe section, and the gasket is clamped between the first air inlet pipe section and the second air inlet pipe section.

Preferably, both sides of the first air inlet pipe section and both sides of the second air inlet pipe section are provided with tightening grooves, and the tightening grooves extend along the circumferential direction of the second air inlet pipe section.

Preferably, the air inlet pipe further comprises a filter screen, and the filter screen is arranged in the second air inlet channel of the second air inlet pipe section.

An engine comprising a prechamber intake as described in any of the above.

The utility model has the advantages that:

the utility model provides a prechamber intake pipe and engine, when carrying out prechamber intake pipe equipment, put into the air inlet section of first inlet channel on the first inlet duct section with the check valve earlier, the check valve slides in the bottom of air inlet section along the air inlet section, whether there is the incline in the position of observing the check valve, if incline then invert first inlet duct section with the check valve roll-off, put into the air inlet section again, the axiality meet the demands until check valve and air inlet section, then carry out the pressure equipment to the check valve through pressure device, impress the check valve installing section with the check valve, accomplish behind the installation between check valve and the first inlet duct section again with first inlet duct section and second inlet duct section spiro union. Through the setting of first intake pipe section and second intake pipe section spiro union, the gliding distance when effectively having shortened the check valve installation, reduced the collision strength with first intake pipe section inner wall when the check valve slides to the intake section bottom, the probability that the check valve takes place the incline has been reduced, and compare whole precombustion chamber intake pipe, whether the shorter first intake pipe section makes the position that operating personnel can observe the check valve after the check valve slides into the intake section bottom satisfy the requirement, avoid the condemned condition of check valve position skew to lead to precombustion chamber intake pipe after the pressure equipment. In the use process of the prechamber air inlet pipe, the first air inlet pipe section and the second air inlet pipe section can be independently replaced, and the maintenance cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a prechamber air inlet duct according to an embodiment of the present invention;

FIG. 2 is a first cross-sectional view of a prechamber air inlet duct provided by an embodiment of the invention;

FIG. 3 is a second cross-sectional view of an intake duct for a prechamber according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a first intake duct section of a prechamber intake duct according to an embodiment of the invention.

In the figure:

1. a one-way valve;

2. a first intake pipe section; 21. a first air intake passage; 211. a check valve mounting section; 212. an air intake section; 213. a limiting section; 214. an air outlet; 22. a first sealing spherical surface; 23. a guide slope;

3. a second air intake duct section; 31. a second intake passage; 32. a limiting bulge; 33. an annular projection;

4. a seal ring;

5. a gasket;

6. tightening the groove;

7. and (5) filtering by using a filter screen.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1-4, the present embodiment provides a prechamber air intake comprising a non return valve 1, a first air intake section 2 and a second air intake section 3. First intake pipe section 2 is provided with and runs through first intake passage 21 of first intake pipe section 2 along first direction, first intake passage 21 is including setting up in the check valve installation section 211 of first intake pipe section 2 first end and setting up in the section 212 that admits air of first intake pipe section 2 second end, check valve installation section 211 and the section 212 intercommunication and coaxial setting of admitting air, check valve 1 sets up in check valve installation section 211, and with the chamber wall interference fit of check valve installation section 211, the diameter of the section 212 that admits air is greater than the diameter of check valve 1. The first end of the second air inlet pipe section 3 is in threaded connection with the second end of the first air inlet pipe section 2, the second air inlet pipe section 3 is provided with a second air inlet channel 31 which penetrates through the second air inlet pipe section 3 along the first direction, and the second air inlet channel 31 is communicated with the first air inlet channel 21.

The prechamber air inlet pipe provided by the embodiment is characterized in that when the prechamber air inlet pipe is assembled, the check valve 1 is placed into the air inlet section 212 of the first air inlet channel 21 on the first air inlet pipe section 2, the check valve 1 slides into the bottom end of the air inlet section 212 along the air inlet section 212, whether the position of the check valve 1 is inclined or not is observed, if the position is inclined, the first air inlet pipe section 2 is inverted to slide the check valve 1 out, the air inlet section 212 is placed again, until the coaxiality of the check valve 1 and the air inlet section 212 meets the requirement, then the check valve 1 is pressed through the pressure device, the check valve 1 is pressed into the check valve mounting section 211, and the first air inlet pipe section 2 and the second air inlet pipe section 3 are screwed after the mounting between the check valve 1 and the first air inlet pipe section 2 is completed. Through the setting of first intake pipe section 2 and 3 spiro unions of second intake pipe section, the distance of sliding down when having effectively shortened the installation of check valve 1, reduced 1 when sliding to the section of admitting air 212 bottom of check valve and the collision strength of the 2 inner walls of first intake pipe section, the probability that the check valve 1 takes place the incline has been reduced, and compare whole precombustion chamber intake pipe, shorter first intake pipe section 2 makes the position that operating personnel can observe check valve 1 after check valve 1 slides into the section of admitting air 212 bottom and whether meet the demands, avoided the skew condition that leads to the condemned condition of precombustion chamber intake pipe after the pressure equipment of check valve 1 position. In the use process of the air inlet pipe of the precombustion chamber, the first air inlet pipe section 2 and the second air inlet pipe section 3 can be independently replaced, so that the maintenance cost is reduced.

Optionally, as shown in fig. 4, a guide inclined surface 23 is provided between the check valve installation section 211 and the air intake section 212, so as to further reduce the probability of the check valve 1 deflecting when sliding to the bottom end of the air intake section 212.

Optionally, as shown in fig. 2 to 4, the first air intake passage 21 further includes a limiting section 213 coaxially disposed with the one-way valve installation section 211, the limiting section 213 is disposed on a side of the one-way valve installation section 211 away from the air intake section 212, and a diameter of the limiting section 213 is smaller than a diameter of the one-way valve installation section 211. Carry on spacingly through setting up spacing section 213 to check valve 1, guarantee that the position after the check valve 1 pressure equipment satisfies the design requirement, avoid check valve 1 too close to the first end tip of first intake pipe section 2.

Alternatively, as shown in fig. 2 and 3, the second air intake pipe section 3 is arranged coaxially with the first air intake pipe section 2, and the coaxially arranged second air intake pipe section 3 and first air intake pipe section 2 enable the prechamber air intake pipe to be easily mounted to the engine head. The second air intake passage 31 and the air intake section 212 are coaxially arranged, thereby ensuring the air intake efficiency of the pre-chamber air intake pipe.

Alternatively, as shown in fig. 1, the end of the first air intake pipe section 2 is provided with a first sealing spherical surface 22 surrounding the air outlet 214 of the first air intake passage 21, and the first sealing spherical surface 22 is used for fitting with a second sealing spherical surface provided on the engine head. After the prechamber air inlet pipe is installed on an engine cylinder cover, the air inlet pipe and the engine cylinder cover are sealed through the matching of the first sealing spherical surface 22 and the second sealing spherical surface, so that gas in the prechamber is prevented from leaking from a gap between the prechamber air inlet pipe and the engine cylinder cover, and the performance of an engine is ensured.

Optionally, as shown in fig. 1 and 2, a limiting protrusion 32 is convexly arranged on the outer wall of the second end of the second air inlet pipe section 3. The limiting protrusion 32 is used for being matched with a limiting groove arranged on a cylinder cover of the engine, so that relative rotation between the air inlet pipe of the pre-combustion chamber and the cylinder cover of the engine in the installation and use processes is avoided.

Optionally, as shown in fig. 1 and fig. 2, the prechamber air intake pipe provided in this embodiment further includes a sealing ring 4, a sealing groove extending along a circumferential direction of the second air intake pipe section 3 is provided on an outer wall of the second air intake pipe section 3, the sealing ring 4 is sleeved in the sealing groove, and a portion of the sealing ring 4 is exposed to the sealing groove. The sealing effect between the air inlet pipe of the precombustion chamber and the engine cylinder cover is further improved by arranging the sealing ring 4.

Optionally, as shown in fig. 1 to 3, the prechamber air intake duct provided in this embodiment further includes a gasket 5, and the gasket 5 is interposed between the first air intake duct section 2 and the second air intake duct section 3. The sealing effect at the joint of the first air inlet pipe section 2 and the second air inlet pipe section 3 is further improved by arranging the gasket 5. Specifically, in the present embodiment, the gasket 5 is a metal gasket.

Alternatively, as shown in fig. 1 to 4, the fastening grooves 6 are provided on both sides of the first air inlet pipe section 2 and both sides of the second air inlet pipe section 3, and the fastening grooves 6 extend in the circumferential direction of the second air inlet pipe section 3. By arranging the fastening grooves 6 on the first air inlet pipe section 2 and the second air inlet pipe section 3, when the first air inlet pipe section 2 and the second air inlet pipe section 3 are mounted and dismounted, an operator can hold or clamp the first air inlet pipe section 2 and the second air inlet pipe section 3 by the fastening grooves 6.

Optionally, as shown in fig. 2 and 3, the prechamber air intake duct provided in this embodiment further comprises a screen 7, and the screen 7 is arranged in the second air intake passage 31 of the second air intake duct section 3. By arranging the filter screen 7 in the second air inlet pipe section 3, clean and clean gas entering the pre-combustion chamber is ensured.

Optionally, as shown in fig. 1-3, the outer wall of the second end of the second intake pipe section 3 is provided with an annular protrusion 33 surrounding the second intake pipe section 3. When the prechamber air inlet pipe is mounted on the engine cylinder head, the prechamber air inlet pipe can be fixed on the engine cylinder head through the cooperation of the fastening piece and the annular bulge 33. Specifically, the top of second intake pipe section 3 is located to the fastener cover, sets up the external screw thread on the fastener, sets up the internal thread on the engine cylinder lid, rotates the fastener and makes fastener and engine cylinder lid spiro union, until the bottom of fastener and the top butt of annular bulge 33 to realize fixing between prechamber intake pipe and the engine cylinder lid.

The embodiment also provides an engine, including foretell prechamber intake pipe, be provided with spacing groove and second sealed sphere on the cylinder cap of engine. The second sealing spherical surface is attached to the first sealing spherical surface 22. After the pre-combustion chamber air inlet pipe is installed on an engine cylinder cover, the sealing between the pre-combustion chamber air inlet pipe and the engine cylinder cover is realized through the matching of the first sealing spherical surface 22 and the second sealing spherical surface, the leakage of gas in the pre-combustion chamber from a gap between the pre-combustion chamber air inlet pipe and the engine cylinder cover is avoided, and the performance of the engine is ensured. The spacing groove extends along the first direction, and spacing arch 32 stretches into the spacing inslot, through spacing arch 32 on the second intake pipe section 3 and the spacing groove cooperation on the cylinder cap of engine, avoids the precombustion chamber intake pipe to take place relative rotation and lead to first sealed sphere 22 wearing and tearing influence sealed effect with the engine cylinder cap in installation of precombustion chamber intake pipe and use.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A prechamber air inlet duct, characterized in that it comprises:

a check valve (1);

the air inlet structure comprises a first air inlet pipe section (2) and a second air inlet pipe section (2), wherein the first air inlet pipe section (2) is provided with a first air inlet channel (21) penetrating through the first air inlet pipe section (2) along a first direction, the first air inlet channel (21) comprises a one-way valve mounting section (211) arranged at the first end of the first air inlet pipe section (2) and an air inlet section (212) arranged at the second end of the first air inlet pipe section (2), the one-way valve mounting section (211) is communicated with the air inlet section (212) and is coaxially arranged, a one-way valve (1) is arranged in the one-way valve mounting section (211) and is in interference fit with the cavity wall of the one-way valve mounting section (211), and the diameter of the air inlet section (212) is larger than that of the one-way valve (1);

the first end of the second air inlet pipe section (3) is in threaded connection with the second end of the first air inlet pipe section (2), a second air inlet channel (31) penetrating through the second air inlet pipe section (3) along the first direction is arranged on the second air inlet pipe section (3), and the second air inlet channel (31) is communicated with the first air inlet channel (21).

2. A prechamber air inlet duct according to claim 1, characterized in that the first air inlet channel (21) further comprises a limiting section (213) arranged coaxially with the one-way valve mounting section (211), which limiting section (213) is arranged at the side of the one-way valve mounting section (211) facing away from the air inlet section (212), the diameter of which limiting section (213) is smaller than the diameter of the one-way valve mounting section (211).

3. A prechamber air inlet duct according to claim 1, characterized in that the second air inlet duct section (3) is arranged coaxially with the first air inlet duct section (2), the second air inlet channel (31) and the air inlet section (212) being arranged coaxially.

4. A prechamber air inlet duct according to claim 1, characterized in that the end of the first air inlet duct section (2) is provided with a first sealing sphere (22) surrounding the air outlet (214) of the first air inlet channel (21).

5. A prechamber air inlet duct according to claim 4, characterised in that the outer wall of the second end of the second air inlet duct section (3) is provided with a stop protrusion (32) protruding therefrom.

6. The prechamber air inlet pipe according to claim 1, characterized in that a sealing ring (4) is provided, a sealing groove extending along the circumferential direction of the second air inlet pipe section (3) is provided on the outer wall of the second air inlet pipe section (3), the sealing ring (4) is sleeved in the sealing groove, and the sealing ring (4) is partially exposed out of the sealing groove.

7. A prechamber air inlet duct according to claim 1, characterized in that it further comprises a gasket (5), which gasket (5) is sandwiched between the first air inlet duct section (2) and the second air inlet duct section (3).

8. A prechamber air inlet duct according to claim 1, characterized in that both sides of the first air inlet duct section (2) and both sides of the second air inlet duct section (3) are provided with tightening grooves (6), which tightening grooves (6) extend in the circumferential direction of the second air inlet duct section (3).

9. A prechamber air inlet duct according to claim 1, characterized in that it further comprises a screen (7), which screen (7) is arranged in the second air inlet channel (31) of the second air inlet duct section (3).

10. An engine comprising a prechamber air inlet duct according to any of claims 1-9.

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