Sealing structure of methanol nozzle

Abstract

The utility model discloses a sealing structure of a methanol nozzle, which relates to a methanol engine injection system and comprises a connector, one end of the connector is provided with a nozzle mounting portion for mounting a nozzle, a nozzle connector is arranged in the connector, and one end of the nozzle connector far away from the nozzle mounting portion is provided with a methanol through hole. A methanol passing hole is formed in one end of the connector, a pressure relief opening is formed in the position, on one side of the methanol passing hole, of the connector, the pressure relief opening is communicated with the methanol passing hole, a methanol input opening is formed in the other end of the connector, and the methanol input opening is communicated with the methanol passing hole. According to the utility model, the leakage of methanol is prevented, the methanol pollution is reduced, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to a methanol engine injection system, and more particularly to a sealing structure of a methanol nozzle. Background Art

[0002] A methanol engine uses methanol as fuel, injecting it into the intake manifold to achieve combustion. Compared to traditional gasoline engines, methanol engines offer several advantages: methanol has a higher energy density than gasoline, providing higher power output; the primary products of methanol combustion are carbon dioxide and water, resulting in less environmental pollution; and methanol is a renewable energy source, reducing fuel costs.

[0003] In traditional methanol engine nozzle mounting structures, the nozzle is mounted on the intake manifold, often leaving it exposed. Furthermore, during engine operation, if the methanol pressure at the nozzle input is unstable, particularly when the methanol supply pressure is high, the connection between the nozzle and the methanol delivery pipe is subject to significant pressure. Long-term exposure to this unstable pressure increases the risk of leakage at this connection. Furthermore, compared to traditional gasoline and diesel, methanol is more volatile and toxic, posing a significant safety hazard if leaked methanol evaporates. Therefore, a sealing structure for methanol nozzles is urgently needed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sealing structure for a methanol nozzle in view of the deficiencies in the prior art, thereby greatly reducing the risk of methanol leakage.

[0005] The utility model describes a sealing structure for a methanol nozzle, comprising a connector, one end of the connector being provided with a nozzle mounting portion for mounting a nozzle, a nozzle connecting port being provided in the connector, an end of the nozzle connecting port away from the nozzle mounting portion being provided with a methanol passage hole, a pressure relief port being provided on the connector on one side of the methanol passage hole, the pressure relief port being connected to the methanol passage hole, and a methanol input port being provided at the other end of the connector, the methanol input port being connected to the methanol passage hole.

[0006] As a further improvement, a vent hole 1 is provided on one side of the methanol passage hole, and both ends of the vent hole 1 are respectively connected to the methanol input port and the nozzle connection port.

[0007] Furthermore, a residual gap is provided at the connection between the nozzle connection port and the methanol through hole.

[0008] Furthermore, a second vent hole is provided between the pressure relief port and the nozzle connection port and is connected to both of them.

[0009] As a further improvement, a nozzle mounting opening is provided in the nozzle mounting portion, the nozzle mounting opening is communicated with the nozzle connecting opening, and a wiring harness outlet is provided on one side of the nozzle mounting opening.

[0010] Furthermore, a vent hole three is provided between the wiring harness outlet and the pressure relief port and is connected to both of them.

[0011] As a further improvement, the connecting body and the nozzle mounting portion are of a split structure, and the connecting body and the nozzle mounting portion are detachably connected.

[0012] Furthermore, both ends of the nozzle mounting portion are provided with sealing ring placement grooves.

[0013] Beneficial effects

[0014] The advantages of the present invention are:

[0015] 1. The nozzle is installed in a sealing structure to seal and protect the nozzle; and a pressure relief port connected to the methanol through hole is provided in the connector. When the methanol supply pressure is unstable and an excessive supply occurs, the methanol is discharged and recovered through the pressure relief port to stabilize the methanol pressure at the nozzle input end, thereby reducing the risk of methanol leakage, reducing methanol pollution, and improving safety.

[0016] 2. The connector and the nozzle mounting part are split structures and adopt a detachable connection method to facilitate the installation of the nozzle.

[0017] 3. Through the setting of vent hole 1, the residual gap, vent hole 2 and vent hole 3, and the four are interconnected, an outer ventilation structure is formed around the nozzle after installation, forming an enclosure for the nozzle, so as to facilitate the extraction of methanol volatilized in the sealing structure, solving the problem of methanol gas being difficult to be extracted due to excessive air tightness in the sealing mechanism and poor air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the sealing structure of the present utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the sealing structure of the present invention.

[0020] Among them: 1-connector, 2-nozzle mounting part, 100-methanol inlet, 101-vent hole 1, 102-methanol through hole, 103-nozzle connection port, 104-pressure relief port, 105-vent hole 2, 106-remaining gap, 201-sealing ring placement groove, 202-vent hole 3, 203-wiring harness outlet, 204-nozzle mounting port. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments, but this does not constitute any limitation to the present invention. Any limited modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0022] See Figure 1-Figure 2 The sealing structure of a methanol nozzle of the present invention is composed of a split connector 1 and a nozzle mounting portion 2. The nozzle mounting portion 2 is used to mount the nozzle. The connector 1 and the nozzle mounting portion 2 are detachably connected to facilitate the installation of the nozzle. Specifically, Figure 1 As shown, two through holes are provided in both the connector 1 and the nozzle mounting portion 2. The through holes on the connector 1 and the nozzle mounting portion 2 correspond to each other and are interconnected, so that the sealing structure and the nozzle as a whole can be installed on the intake pipe by bolts. A nozzle mounting port 204 is provided in the nozzle mounting portion 2, and a threaded groove is provided in the nozzle mounting port 204. The nozzle mounting port 204 is connected to the nozzle connecting port 103, and a wiring harness outlet 203 is provided on one side of the nozzle mounting port 204. During installation, it is only necessary to screw the nozzle into the nozzle mounting port 204, and after screwing the nozzle, plug the nozzle wiring harness into the nozzle through the wiring harness outlet 203 to complete the installation of the nozzle. It should be noted that a rubber sleeve that matches the wiring harness outlet 203 is provided on the wiring harness to seal the gap between the wiring harness and the wiring harness outlet 203.

[0023] To improve the seal between the nozzle mounting portion 2 and the end surface of the intake pipe, and between the nozzle mounting portion 2 and the connector 1, sealing ring placement grooves 201 are provided at both ends of the nozzle mounting portion 2 in this embodiment. During installation, rubber sealing rings are placed in the sealing ring placement grooves 201, which better seals the nozzle mounting portion 2 at the connection between the nozzle and the connector 1, improving sealing performance.

[0024] The connector 1 is provided with a nozzle connection port 103. A methanol passage hole 102 is formed on one end of the connector 103, facing away from the nozzle mounting portion 2. This hole has a diameter equal to or slightly larger than the nozzle's ejection end, and both ends are trumpet-shaped to facilitate the passage of methanol. A pressure relief port 104 is provided on the connector 1 on one side of the methanol passage hole 102. This pressure relief port 104 is connected to the methanol passage hole 102. A return pipe is screwed into the pressure relief port 104, which is equipped with a control valve. This pipe transports discharged methanol to a methanol storage device for recycling, preventing methanol leakage, reducing methanol contamination, and improving safety. A methanol inlet 100 is provided on the other end of the connector 1. This inlet 100 is connected to the methanol passage hole 102 and is used to transport methanol inputted through the inlet 100 to the nozzle through the passage hole 102. The nozzle then sprays the methanol into the engine intake pipe. A connecting pipe is screwed into the methanol inlet 100. When the methanol supply pressure is unstable and too high, it means that too much methanol is supplied. At this time, the control valve is opened to discharge part of the methanol through the pressure relief port 104 to make the methanol pressure in the sealing mechanism stable and not greater than the set target pressure value. This ensures the sealing reliability of the sealing mechanism and reduces the risk of methanol leakage.

[0025] After the engine stops running, methanol liquid will remain in the sealing mechanism. This methanol liquid will evaporate into gas, causing excessive pressure in the sealing mechanism. To facilitate the discharge of this gas, a vent hole 101 is provided on one side of the methanol passage hole 102 in this embodiment. The ends of vent hole 101 are connected to the methanol inlet 100 and the nozzle connection port 103, respectively. Vent hole 101 has a smaller diameter than that of methanol passage hole 102 and is primarily used to equalize the pressure at both ends of methanol passage hole 102. A pressure sensor can also be installed within it to monitor the methanol pressure in the sealing mechanism. A residual gap 106 is provided at the junction of nozzle connection port 103 and methanol passage hole 102 to prevent the nozzle in nozzle connection port 103 from clogging or partially clogging methanol passage hole 102, thereby facilitating the flow of gas in nozzle connection port 103 through methanol passage hole 102. In addition, a second vent hole 105 communicating with the pressure relief port 104 and the nozzle connection port 103 is provided between the two ports, and a third vent hole 202 communicating with the two ports is provided between the harness outlet 203 and the pressure relief port 104 .

[0026] By setting up vent hole 101, residual gap 106, vent hole 2 105 and vent hole 3 202, and the four being interconnected, an outer ventilation structure is formed around the nozzle after installation, forming an enclosure for the nozzle, so as to facilitate the extraction of methanol gas volatilized in the sealing structure, solving the problem of methanol gas being difficult to be extracted due to excessive air tightness in the sealing mechanism and poor air flow.

[0027] 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. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A sealing structure for a methanol nozzle, characterized in that: The invention comprises a connector (1), one end of the connector (1) is provided with a nozzle mounting portion (2) for mounting a nozzle, a nozzle connection port (103) is provided in the connector (1), a methanol passage hole (102) is provided at one end of the nozzle connection port (103) away from the nozzle mounting portion (2), a pressure relief port (104) is provided on the connector (1) on one side of the methanol passage hole (102), the pressure relief port (104) is communicated with the methanol passage hole (102), and a methanol input port (100) is provided at the other end of the connector (1), the methanol input port (100) is communicated with the methanol passage hole (102).

2. The sealing structure of a methanol nozzle according to claim 1, characterized in that: A vent hole 1 (101) is provided on one side of the methanol passage hole (102), and both ends of the vent hole 1 (101) are respectively connected to the methanol input port (100) and the nozzle connection port (103).

3. The sealing structure of a methanol nozzle according to claim 2, characterized in that: A residual gap (106) is provided at the connection between the nozzle connection port (103) and the methanol passage hole (102).

4. The sealing structure of a methanol nozzle according to claim 2, characterized in that: A second vent hole (105) communicating with the pressure relief port (104) and the nozzle connection port (103) is provided between the pressure relief port (104) and the nozzle connection port (103).

5. The sealing structure of a methanol nozzle according to claim 1, characterized in that: A nozzle mounting opening (204) is provided in the nozzle mounting portion (2), the nozzle mounting opening (204) is communicated with the nozzle connecting opening (103), and a wiring harness outlet (203) is provided on one side of the nozzle mounting opening (204).

6. The sealing structure of a methanol nozzle according to claim 5, characterized in that: A third vent hole (202) is provided between the wiring harness outlet (203) and the pressure relief port (104) and is in communication with both.

7. The sealing structure of a methanol nozzle according to claim 1 or 5, characterized in that: The connecting body (1) and the nozzle mounting portion (2) are of a split structure, and the connecting body (1) and the nozzle mounting portion (2) are detachably connected.

8. The sealing structure of a methanol nozzle according to claim 7, characterized in that: Both ends of the nozzle mounting portion (2) are provided with sealing ring placement grooves (201).

Images