Backflow prevention structure for oil way of oil injection machine

Abstract

The utility model relates to the technical field of air valve components for oil injection, in particular to a backflow prevention structure for an oil way of an oil injection machine. An oil way anti-reflux structure of an oil injection machine comprises an oil injection assembly used for injecting oil; an oil inlet port, an oil outlet port and an air inlet port are formed in the outer side of the Venturi pipe fitting, a connecting channel is arranged between the air inlet port and the oil outlet port in a penetrating mode, and the radial size of the connecting channel gradually changes from the air inlet port to the oil outlet port. The oil injection machine has the advantages that the structure utilizes the Venturi effect, a special connecting channel is arranged in the oil injection machine, the problem that oil inlet is blocked due to gas injection in a traditional oil injection machine is solved, the phenomenon that oil inlet of an oil inlet port is blocked can be effectively reduced, oil enters the oil injection port more smoothly, and the service life of the oil injection machine is prolonged. Therefore, the oil injection efficiency and the stability of the oil injection machine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas valve components for oil injection, in particular to an oil circuit anti-backflow structure for an oil injection machine. Background Art

[0002] The current fuel injector nozzle is connected to the oil pump and the air pump through a three-way pipe, and the air pump injects gas to increase the oil injection speed of the fuel injector.

[0003] However, since the gas injected by the air pump will also flow through the connection with the oil pump in the three-way pipe, the oil flowing into the three-way pipe will flow back, which will hinder the smooth flow of the oil, resulting in oil inlet obstruction, thereby reducing the injection efficiency. Utility Model Content

[0004] The utility model aims at the technical problems existing in the prior art and provides an anti-backflow structure for the oil circuit of an injector to solve the problem that the gas injected by the pneumatic pump also flows through the connection with the oil pump in the three-way pipe, causing the oil flowing into the three-way pipe to flow back, thereby hindering the smooth flow of the oil, resulting in oil inlet obstruction and reducing the injection efficiency.

[0005] The utility model solves the above technical problems with the following technical solutions: an anti-backflow structure for the oil circuit of an oil injection machine, comprising:

[0006] An oil injection assembly, the oil injection assembly is used to inject oil;

[0007] A venturi fitting, wherein an oil inlet port, an oil outlet port, and an air inlet port are respectively arranged on the outside of the venturi fitting, wherein a connecting passage is arranged between the air inlet port and the oil outlet port, and the radial dimension of the connecting passage gradually increases from the air inlet port along the direction of the oil outlet port, the oil inlet port of the venturi fitting is connected to the fuel injection assembly, and the oil outlet port is connected to the air inlet port.

[0008] The beneficial effects of the utility model are:

[0009] 1) The fuel injection structure utilizes the Venturi effect. A connecting channel is designed between the oil inlet port and the oil outlet port. The radial dimension of the connecting channel gradually increases along the direction from the air inlet port to the oil outlet port. Therefore, the design of the connecting channel increases the gas flow rate injected by the air pump, forming a low-pressure area. The low-pressure area formed near the connecting channel produces an adsorption effect, which adsorbs the oil flowing out of the oil inlet port to the oil outlet port and flows smoothly to the nozzle and the nozzle.

[0010] 2) In summary, this patent utilizes the Venturi effect to set up a special connecting channel in the fuel injector, which solves the problem of oil inlet obstruction caused by gas injection in traditional fuel injectors. It can effectively reduce the phenomenon of oil inlet obstruction at the oil inlet port, making the oil enter more smoothly, thereby improving the fuel injection efficiency and stability of the fuel injector.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the oil injection assembly includes a spray head and a plurality of nozzles, wherein the plurality of nozzles are arranged on the spray head, and the nozzles are connected to the oil inlet port.

[0013] Furthermore, the oil inlet port is connected to an external oil pump, and a pipe mouth of the external oil pump is screwed and connected to the oil inlet port through a thread.

[0014] Furthermore, the air inlet port is connected to an external air pressure pump, and the pipe mouth of the external air pressure pump is screwed and connected to the air inlet port through a thread.

[0015] Furthermore, the radial dimension of the opening of the connecting channel connected to the air inlet port is larger than the radial dimension of the pipe opening of the external air pressure pump.

[0016] The beneficial effect of adopting the above-mentioned further scheme is that the radial size of the opening of the connecting channel connected to the air inlet port is larger than the radial size of the pipe mouth of the external air pressure pump, so that the air pressure injected by the external air pressure pump can flow into the connecting channel accurately and thoroughly, avoiding the situation where the injected gas cannot effectively flow into the connecting channel due to the excessive size of the pipe mouth of the external air pressure pump.

[0017] Furthermore, the pipe mouth of the external air pressure pump is located in the air inlet port and in the center line area of ​​the oil outlet port. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the front cross-sectional structure of the Venturi tube of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 100. fuel injection assembly, 101. nozzle, 102. nozzle, 200. venturi pipe, 210. oil inlet port, 220. oil outlet port, 230. air inlet port, 300. connecting channel, 400. external oil pump, 500. external air pressure pump. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] The current fuel injector nozzle is connected to the oil pump and the air pump through a three-way pipe, and the air pump injects gas to increase the oil injection speed of the fuel injector.

[0024] However, since the gas injected by the pneumatic pump will also flow through the connection with the oil pump in the three-way pipe, the oil flowing into the three-way pipe will flow back, which will hinder the smooth flow of the oil and cause oil inlet obstruction, thereby reducing the injection efficiency. In response to this, the utility model proposed an anti-backflow structure for the oil circuit of the injector to solve the above problem.

[0025] The utility model provides the following preferred embodiments

[0026] like Figure 1 and Figure 2 As shown, a fuel injection machine oil circuit anti-backflow structure comprises:

[0027] The oil injection assembly 100 is used for injecting oil;

[0028] The venturi tube 200 has an oil inlet port 210, an oil outlet port 220, and an air inlet port 230 respectively disposed on the outside of the venturi tube 200, wherein a connecting passage 300 is provided between the air inlet port 230 and the oil outlet port 220, and the radial dimension of the connecting passage 300 gradually increases from the air inlet port 230 to the oil outlet port 220, the oil inlet port 210 of the venturi tube 200 is connected to the fuel injection assembly 100, and the oil outlet port 220 is connected to the air inlet port 230;

[0029] The oil injection structure utilizes the Venturi effect. A connecting channel 300 is designed between the oil inlet port 210 and the oil outlet port 220. The radial dimension of the connecting channel 300 gradually increases along the direction from the air inlet port 230 to the oil outlet port 220. Therefore, the design of the connecting channel 300 increases the flow rate of the gas injected by the air pressure pump, forming a low-pressure area. The low-pressure area formed near the connecting channel 300 produces an adsorption effect, which adsorbs the oil flowing out of the oil inlet port 210 to the oil outlet port 220, and smoothly flows to the nozzle 101 and the nozzle 102.

[0030] In summary, this patent utilizes the Venturi effect and sets a special connecting channel 300 in the fuel injector, which solves the problem of oil inlet obstruction caused by gas injection in traditional fuel injectors. It can effectively reduce the phenomenon of oil inlet obstruction at the oil inlet port 210, making the oil enter more smoothly, thereby improving the fuel injection efficiency and stability of the fuel injector.

[0031] In this embodiment, Figure 1 and Figure 2 As shown, the oil injection assembly 100 includes a spray head 101 and a plurality of nozzles 102 . The plurality of nozzles 102 are disposed on the spray head 101 , and the nozzles 102 are connected to the oil inlet port 210 .

[0032] In this embodiment, Figure 1 and Figure 2 As shown, the oil inlet port 210 is connected to an external oil pump 400 , and a pipe mouth of the external oil pump 400 is screwed and connected to the oil inlet port 210 through a thread.

[0033] In this embodiment, Figure 1 and Figure 2 As shown, the air inlet port 230 is connected to an external air pressure pump 500 , and the pipe mouth of the external air pressure pump 500 is screwed and connected to the air inlet port 230 through a thread.

[0034] In this embodiment, Figure 1 and Figure 2 As shown, the radial dimension of the opening of the connecting channel 300 connected to the air inlet port 230 is larger than the radial dimension of the pipe opening of the external air pressure pump 500, wherein the diameter of the opening of the connecting channel 300 connected to the air inlet port 230 is 3 mm, while the diameter of the pipe opening of the external air pressure pump 500 is 1.5 mm. By making the radial dimension of the opening of the connecting channel 300 connected to the air inlet port 230 larger than the radial dimension of the pipe opening of the external air pressure pump 500, the air pressure injected by the external air pressure pump 500 can flow into the connecting channel 300 accurately and thoroughly, thereby avoiding the situation where the injected gas cannot effectively flow into the connecting channel 300 due to the excessive size of the pipe opening of the external air pressure pump 500.

[0035] In this embodiment, Figure 1 and Figure 2 As shown, the pipe mouth of the external air pressure pump 500 is located in the air inlet port 230 and is located in the centerline area of ​​the oil outlet port 220 .

[0036] The specific working process of the utility model is as follows:

[0037] A connecting channel 300 is designed between the oil inlet port 210 and the oil outlet port 220. The radial dimension of the connecting channel 300 gradually increases along the direction from the air inlet port 230 to the oil outlet port 220. Therefore, the design of the connecting channel 300 increases the flow rate of the gas injected by the air pressure pump, forming a low-pressure area. The low-pressure area formed near the connecting channel 300 produces an adsorption effect, which adsorbs the oil flowing out of the oil inlet port 210 to the oil outlet port 220 and flows smoothly to the nozzle 101 and the nozzle 102.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel injection machine oil circuit anti-backflow structure, characterized in that: include: An oil injection assembly, the oil injection assembly is used to inject oil; A venturi fitting, wherein an oil inlet port, an oil outlet port, and an air inlet port are respectively arranged on the outside of the venturi fitting, wherein a connecting passage is arranged between the air inlet port and the oil outlet port, and the radial dimension of the connecting passage gradually increases from the air inlet port along the direction of the oil outlet port, the oil inlet port of the venturi fitting is connected to the fuel injection assembly, and the oil outlet port is connected to the air inlet port.

2. The anti-backflow structure of the oil circuit of the fuel injection machine according to claim 1 is characterized in that: The oil injection assembly comprises a spray head and a plurality of nozzles. The plurality of nozzles are arranged on the spray head, and the nozzles are connected with the oil inlet port.

3. The anti-backflow structure of the oil circuit of the fuel injection machine according to claim 1 is characterized in that: The oil inlet port is connected to an external oil pump, and a pipe mouth of the external oil pump is screwed and connected to the oil inlet port through a thread.

4. The anti-backflow structure of the oil circuit of the fuel injection machine according to claim 1, characterized in that: The air inlet port is connected to an external air pressure pump, and the pipe mouth of the external air pressure pump is screwed and connected to the air inlet port through a thread.

5. The anti-backflow structure of the oil circuit of the fuel injection machine according to claim 1 is characterized in that: The radial dimension of the opening of the connecting channel connected to the air inlet port is larger than the radial dimension of the pipe opening of the external air pressure pump.

6. The anti-backflow structure of the oil circuit of the fuel injection machine according to claim 5, characterized in that: The pipe mouth of the external air pressure pump is located in the air inlet port and in the center line area of ​​the oil outlet port.

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