Carburetor leak test device

Abstract

The utility model aims at providing a carburetor leak testing arrangement, it includes casing and sets up on casing and tests subassembly of direction adjusting component, direction adjusting component includes first manual valve, positive pressure check valve, positive pressure regulating valve, negative pressure check valve, negative pressure regulating valve and vacuum generator, first manual valve is used for communicating with outside gas source, positive pressure check valve communicates with first manual valve through positive pressure regulating valve, positive pressure check valve still communicates with first manual valve one end close to positive pressure regulating valve, negative pressure check valve communicates with first manual valve through vacuum generator, negative pressure regulating valve in proper order, negative pressure check valve still communicates with first manual valve one end close to negative pressure regulating valve, test subassembly includes second manual valve, flowmeter and manual switch, second manual valve communicates with positive pressure check valve, negative pressure check valve, second manual valve, manual switch respectively, both ends of flowmeter communicate with second manual valve, one end of manual switch far from second manual valve is used for connecting with carburetor.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing, and in particular to a carburetor leakage testing device. Background Technology

[0002] A carburetor is a mechanical device designed to mix liquid gasoline and air in a specific ratio in an internal combustion engine (mainly a gasoline engine) to form a combustible mixture. Its core function is to precisely meter the fuel and effectively atomize it before mixing it with the appropriate amount of air.

[0003] One of the steps in the carburetor manufacturing process is to conduct leak tests on its internal chambers to ensure the carburetor's quality and stability. Currently, the equipment used for carburetor leak testing is complex and bulky, and in particular, it requires the use of specialized test oil.

[0004] However, existing testing equipment is expensive and requires specialized testing oil, making carburetor leak testing inconvenient, especially for large-scale testing where loading and unloading become overly cumbersome. Therefore, to address these technical problems, the carburetor leak testing device of this application is proposed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a carburetor leakage testing device that is simple, compact, and easy to operate.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A carburetor leakage testing device includes a housing, a steering assembly and a testing assembly disposed on the housing.

[0008] The directional control assembly includes a first manual valve, a positive pressure check valve, a positive pressure regulating valve, a negative pressure check valve, a negative pressure regulating valve, and a vacuum generator. The first manual valve is used to connect to an external air source. The positive pressure check valve is connected to the first manual valve through the positive pressure regulating valve, and the positive pressure check valve is also connected to the end of the first manual valve near the positive pressure regulating valve. The negative pressure check valve is connected to the first manual valve sequentially through the vacuum generator and the negative pressure regulating valve, and the negative pressure check valve is also connected to the end of the first manual valve near the negative pressure regulating valve.

[0009] The test assembly includes a second manual valve, a flow meter, and a manual switch. The second manual valve is connected to the positive pressure check valve, the negative pressure check valve, the second manual valve, and the manual switch. Both ends of the flow meter are connected to the second manual valve. The end of the manual switch away from the second manual valve is used to connect to the carburetor. The second manual valve is used to regulate the directional flow of gas through the flow meter.

[0010] Optionally, the test assembly further includes a filter bottle, through which the second manual valve is connected to the positive pressure check valve and the negative pressure check valve.

[0011] Optionally, the test assembly further includes a pressure gauge connected to the end of the filter bottle furthest from the second manual valve.

[0012] Optionally, a slope is provided on one side of the housing, and the first manual valve, the positive pressure regulating valve, the negative pressure regulating valve, the second manual valve, the flow meter, and the pressure gauge all extend from the slope.

[0013] Optionally, both the positive pressure check valve and the negative pressure check valve are pilot-operated check valves.

[0014] Optionally, the pilot end of the positive pressure check valve is connected to the end of the first manual valve near the positive pressure regulating valve, the first end of the positive pressure check valve is connected to the positive pressure regulating valve, and the second end of the positive pressure check valve is connected to the filter bottle.

[0015] Optionally, the pilot end of the negative pressure check valve is connected to the end of the first manual valve near the negative pressure regulating valve, the first end of the negative pressure check valve is connected to the vacuum generator, and the second end of the negative pressure check valve is connected to the filter bottle.

[0016] Optionally, the first manual valve is a three-way valve.

[0017] Optionally, the second manual valve is a five-way valve.

[0018] Optionally, an air filter is also provided at the end of the first manual valve that is connected to an external air source.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] This utility model discloses a carburetor leakage testing device, comprising a housing, a directional assembly, and a testing assembly mounted on the housing. The directional assembly includes a first manual valve, a positive pressure check valve, a positive pressure regulating valve, a negative pressure check valve, a negative pressure regulating valve, and a vacuum generator. The first manual valve is used to connect to an external air source. The positive pressure check valve is connected to the first manual valve through the positive pressure regulating valve, and the positive pressure check valve is also connected to the end of the first manual valve near the positive pressure regulating valve. The negative pressure check valve is connected to the first manual valve sequentially through the vacuum generator and the negative pressure regulating valve, and the negative pressure check valve is also connected to the end of the first manual valve near the negative pressure regulating valve. The testing assembly includes a second manual valve, a flow meter, and a manual switch. The second manual valve is connected to the positive pressure check valve, the negative pressure check valve, and the manual switch. Both ends of the flow meter are connected to the second manual valve. The end of the manual switch away from the second manual valve is used to connect to the carburetor. The second manual valve is used to regulate the directional flow of gas through the flow meter. Thus, the carburetor leakage testing device of this application uses gas to perform positive and negative pressure testing on the carburetor. It has a simple and compact structure, is easy to operate and use, and achieves bidirectional detection of positive and negative pressure, which can effectively improve the reliability of carburetor airtightness testing and avoid the problem of false detection. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a carburetor leakage testing device according to one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the carburetor leakage test device from another angle;

[0024] Figure 3 for Figure 1 A schematic diagram of the connection structure of the carburetor leakage test device shown;

[0025] Figure 4 for Figure 1 A schematic diagram of the connection structure for positive pressure testing of the carburetor leakage testing device shown;

[0026] Figure 5 for Figure 1 The diagram shows the connection structure of the negative pressure test for the carburetor leakage test device.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Carburetor leakage test device; 100. Housing; 200. Directional assembly; 300. Test assembly; 210. First manual valve; 220. Positive pressure check valve; 230. Positive pressure regulating valve; 240. Negative pressure check valve; 250. Negative pressure regulating valve; 260. Vacuum generator; 310. Second manual valve; 320. Flow meter; 330. Manual switch; 20. Carburetor; 340. Filter bottle; 350. Pressure gauge; 110. Inclined plane; 220a, Positive pressure pilot end; 220b, Positive pressure first end; 220c, Positive pressure second end; 240a, Negative pressure pilot end; 240b, Negative pressure first end; 240c, Negative pressure second end; 210a, Main port; 210b, First air outlet; 210c, Second air outlet; 310a, Main air inlet; 310b, First air inlet; 310c, Second air inlet; 310d, Third air inlet; 310e, Fourth air inlet; 270, Air filter. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0030] like Figures 1 to 3 As shown, a carburetor leakage testing device 10 includes a housing 100, a directional assembly 200, and a testing assembly 300 disposed on the housing 100. The directional assembly 200 includes a first manual valve 210, a positive pressure check valve 220, a positive pressure regulating valve 230, a negative pressure check valve 240, a negative pressure regulating valve 250, and a vacuum generator 260. The first manual valve 210 is used to connect to an external air source. The positive pressure check valve 220 is connected to the first manual valve 210 through the positive pressure regulating valve 230. The positive pressure check valve 220 is also connected to the end of the first manual valve 210 near the positive pressure regulating valve 230. The negative pressure check valve 240 is connected to the vacuum generator 260 in sequence. 0. The negative pressure regulating valve 250 is connected to the first manual valve 210, and the negative pressure check valve 240 is also connected to the end of the first manual valve 210 near the negative pressure regulating valve 250. The test assembly 300 includes a second manual valve 310, a flow meter 320, and a manual switch 330. The second manual valve 310 is connected to the positive pressure check valve 220, the negative pressure check valve 240, the second manual valve 310, and the manual switch 330. Both ends of the flow meter 320 are connected to the second manual valve 310. The end of the manual switch 330 away from the second manual valve 310 is used to connect to the carburetor 20. The second manual valve 310 is used to regulate the directional flow of gas through the flow meter 320.

[0031] It should be noted that, unless otherwise defined, the "connection" mentioned in this application refers to a structure connected using an air pipe. The carburetor leakage testing device 10 of this application performs inflation and negative pressure tests on the carburetor by rotating the first manual valve 210 and the second manual valve 310, thereby detecting whether the carburetor has a leakage problem. Specifically, the first manual valve 210 is either connected to one of the positive pressure regulating valve 230 and the negative pressure regulating valve 250, or it is not connected to either of them. When the first manual valve 210 is connected to the positive pressure regulating valve 230, the first manual valve 210 is not connected to the negative pressure regulating valve 250. Since the positive pressure check valve 220 is also connected to the end of the first manual valve 210 closest to the positive pressure regulating valve 230, the airflow from the external air source can smoothly pass through the positive pressure regulating valve 230 and the positive pressure check valve 220. Then, it passes through the second manual valve 310, directing the airflow through the flow meter 320, and finally flows into the carburetor 20 through the manual switch 330. This process is the inflation test process for the carburetor 20 to detect any leaks. The positive pressure regulating valve 230 can be adjusted to regulate the pressure of the positive airflow. Furthermore, when the first manual valve 210 is connected to the negative pressure regulating valve 250, the first manual valve 210 is not connected to the positive pressure regulating valve 230. Since the negative pressure check valve 240 is also connected to the end of the first manual valve 210 near the negative pressure regulating valve 250, the airflow from the external air source can flow into the vacuum generator 260 through the negative pressure regulating valve 250. This creates a negative pressure at the end of the negative pressure check valve 240 connected to the vacuum generator 260. The magnitude of the negative pressure generated by the vacuum generator 260 can be adjusted by regulating the negative pressure regulating valve 250. Furthermore, the airflow direction under negative pressure is opposite to that under positive pressure. By rotating the second manual valve 310 to change the internal airflow structure, the pipe connecting the carburetor 20 and the manual switch 330 can be directed through the second manual valve 310 to the flow meter 320, and finally connect to the negative pressure check valve 240. Thus, by rotating the first manual valve 210, when external air flows into the positive pressure regulating valve 230, the carburetor 20 is tested for inflation; when external air flows into the negative pressure regulating valve 250, the carburetor 20 is tested for negative pressure. The second manual valve 310 ensures that the airflow direction through the flow meter 320 is consistent regardless of whether the airflow is positive or negative. Therefore, when the carburetor 20 is airtight and leak-free, the reading of the flow meter 320 should theoretically be zero or within an acceptable error range.Thus, compared to existing testing equipment that requires the use of special test oil, the carburetor leakage testing device 10 of this application uses gas to perform positive and negative pressure testing on the carburetor 20. It has a simple and compact structure, is easy to operate and use, and achieves bidirectional detection of positive and negative pressure, which can effectively improve the reliability of the airtightness detection of the carburetor 20 and avoid the problem of false detection.

[0032] like Figure 2 and Figure 3 As shown, in one embodiment, the test assembly 300 further includes a filter bottle 340, and the second manual valve 310 is connected to the positive pressure check valve 220 and the negative pressure check valve 240 through the filter bottle 340.

[0033] It should be noted that since the carburetor 20 is manufactured through machining, metal burrs and debris may remain inside. To prevent these metal burrs and debris from being drawn into the testing system, a filter bottle 340 is provided to collect them. Furthermore, the airflow contains a certain amount of moisture. To prevent moisture from entering the carburetor 20 and affecting the product, the filter bottle 340 is also used to filter the moisture contained in the airflow.

[0034] like Figure 2 and Figure 3 As shown, in one embodiment, the test assembly 300 further includes a pressure gauge 350, which is connected to the end of the filter bottle 340 away from the second manual valve 310.

[0035] It should be noted that, in order to visually display the air pressure in the air pipe during the negative pressure test of the carburetor 20, a pressure gauge 350 is connected between the filter bottle 340 and the positive pressure check valve 220 and the negative pressure check valve 240. In one embodiment, the pressure gauge 350 is an electronic pressure gauge 350.

[0036] like Figure 1 As shown, in one embodiment, a slope 110 is provided on one side of the housing 100, from which the first manual valve 210, positive pressure regulating valve 230, negative pressure regulating valve 250, second manual valve 310, flow meter 320, and pressure gauge 350 all extend. This allows the operator to easily rotate the first manual valve 210 to perform positive or negative pressure tests. Rotating the positive pressure regulating valve 230 adjusts the magnitude of the positive pressure airflow and the magnitude of the negative pressure suction. Rotating the second manual valve 310 ensures that, regardless of whether a positive or negative pressure test is performed, the airflow is directed through the flow meter 320, allowing the flow meter 320 to accurately measure the gas flow rate. Furthermore, it facilitates the operator reading the readings of the flow meter 320 and pressure gauge 350.

[0037] In one embodiment, both the positive pressure check valve 220 and the negative pressure check valve 240 are pilot-operated check valves.

[0038] It should be noted that the pilot-operated check valve is a mature existing product structure, and its working principle is as follows: The pilot-operated check valve has three ports, defined as the pilot end, the first end, and the second end. When no gas is introduced into the pilot end, the first end and the second end are in a unidirectional connection. That is, gas can flow from the first end to the second end to achieve connection; however, gas cannot flow from the second end to the first end to achieve connection. When gas is introduced into the pilot end, the first end and the second end are in a bidirectional connection. That is, gas can flow from the first end to the second end to form a passage, or vice versa.

[0039] like Figure 3 As shown, in one embodiment, the pilot end of the positive pressure check valve 220 is connected to the end of the first manual valve 210 near the positive pressure regulating valve 230, the first end of the positive pressure check valve 220 is connected to the positive pressure regulating valve 230, and the second end of the positive pressure check valve 220 is connected to the filter bottle 340. The pilot end of the negative pressure check valve 240 is connected to the end of the first manual valve 210 near the negative pressure regulating valve 250, the first end of the negative pressure check valve 240 is connected to the vacuum generator 260, and the second end of the negative pressure check valve 240 is connected to the filter bottle 340.

[0040] It should be noted that, for ease of description, the pilot end of the positive pressure check valve 220 is defined as the positive pressure pilot end 220a, the first end of the positive pressure check valve 220 is defined as the positive pressure first end 220b, and the second end of the positive pressure check valve 220 is defined as the positive pressure second end 220c. Similarly, the pilot end of the negative pressure check valve 240 is defined as the negative pressure pilot end 240a, the first end of the negative pressure check valve 240 is defined as the negative pressure first end 240b, and the second end of the negative pressure check valve 240 is defined as the negative pressure second end 240c. Thus, when the first manual valve 210 is rotated to allow external air to flow into the positive pressure regulating valve 230, since no air flows into the negative pressure pilot end 240a, the direction from the negative pressure second end 240c to the negative pressure first end 240b is not open. When gas flows into the positive pressure pilot end 220a, there is bidirectional flow between the positive pressure first end 220b and the positive pressure second end 220c. Thus, the airflow flows from the first manual valve 210 through the positive pressure regulating valve 230 and the positive pressure check valve 220 before entering the filter bottle 340. When the first manual valve 210 is rotated to allow external gas to flow into the negative pressure regulating valve 250, no gas flows into the positive pressure pilot end 220a. Therefore, there is no flow between the positive pressure second end 220c and the positive pressure first end 220b, while gas flows into the negative pressure pilot end 240a. Thus, there is bidirectional flow between the negative pressure second end 240c and the negative pressure first end 240b. Therefore, the negative pressure generated by the vacuum generator 260 can connect to the filter bottle 340 through the negative pressure check valve 240.

[0041] like Figure 3 As shown, in one embodiment, the first manual valve 210 is a three-way valve. Specifically, the three-way valve is a mature existing product. To facilitate understanding of the working principle of the three-way valve, the three ports of the three-way valve are defined as the main port 210a, the first air outlet 210b, and the second air outlet 210c. By adjustment, the main port 210a can be connected to the first air outlet 210b and the second air outlet 210c, respectively. In this way, the main port 210a is connected to an external air source, the first air outlet 210b is connected to the positive pressure pilot terminal 220a, and the second air outlet 210c is connected to the negative pressure pilot terminal 240a.

[0042] like Figure 3 As shown, in one embodiment, the second manual valve 310 is a five-way valve. Specifically, the five-way valve is also a mature existing product. To facilitate understanding of the working principle of the five-way valve, the five ports of the five-way valve are defined as main air port 310a, first air port 310b, second air port 310c, third air port 310d, and fourth air port 310e. The five-way valve has two working states: State 1: Main air port 310a and second air port 310c are connected, and third air port 310d and fourth air port 310e are connected. State 2: Main air port 310a and fourth air port 310e are connected, and first air port 310b and second air port 310c are connected. The flow meter 320 is connected to the second air port 310c and the fourth air port 310e via pipes. Thus, during a positive pressure test, the five-way valve is in state one, and the specific flow path of the positive pressure airflow is as follows: main port 210a, first outlet 210b, positive pressure regulating valve 230, positive pressure first end 220b, positive pressure second end 220c, filter bottle 340, main air port 310a, second air port 310c, flow meter 320, fourth air port 310e, third air port 310d, manual switch 330, carburetor 20. During a negative pressure test, the five-way valve is in state two, and the specific flow path of the negative pressure airflow is as follows: carburetor 20, manual switch 330, first air port 310b, second air port 310c, flow meter 320, fourth air port 310e, main air port 310a, filter bottle 340, negative pressure second end 240c, negative pressure first end 240b, vacuum generator 260.

[0043] like Figure 2 and Figure 3 As shown, in one embodiment, an air filter 270 is also provided at the end of the first manual valve 210 that is connected to the external air source. In this way, by using the air filter 270 to filter the gas supplied by the external air source, it is possible to prevent particles and other impurities from entering the subsequent testing system, thereby improving the reliability of the carburetor leak testing device 10.

[0044] like Figure 3As shown, it should be noted that the solid lines in the figure refer to the connecting structures of the trachea.

[0045] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this utility model can be understood as including, but not limited to, locking and fixing with screws / bolts, welding, or bonding with adhesives, wherein the adhesives used can be commercially available finished products. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A carburetor leakage testing device, characterized in that, Includes a housing and a steering assembly and a testing assembly mounted on the housing: The directional control assembly includes a first manual valve, a positive pressure check valve, a positive pressure regulating valve, a negative pressure check valve, a negative pressure regulating valve, and a vacuum generator. The first manual valve is used to connect to an external air source. The positive pressure check valve is connected to the first manual valve through the positive pressure regulating valve, and the positive pressure check valve is also connected to the end of the first manual valve near the positive pressure regulating valve. The negative pressure check valve is connected to the first manual valve sequentially through the vacuum generator and the negative pressure regulating valve, and the negative pressure check valve is also connected to the end of the first manual valve near the negative pressure regulating valve. The test assembly includes a second manual valve, a flow meter, and a manual switch. The second manual valve is connected to the positive pressure check valve, the negative pressure check valve, the second manual valve, and the manual switch. Both ends of the flow meter are connected to the second manual valve. The end of the manual switch away from the second manual valve is used to connect to the carburetor. The second manual valve is used to regulate the directional flow of gas through the flow meter.

2. The carburetor leakage testing device according to claim 1, characterized in that, The test assembly also includes a filter bottle, and the second manual valve is connected to the positive pressure check valve and the negative pressure check valve through the filter bottle.

3. The carburetor leakage testing device according to claim 2, characterized in that, The test assembly also includes a pressure gauge connected to the end of the filter bottle furthest from the second manual valve.

4. The carburetor leakage testing device according to claim 3, characterized in that, One side of the housing is provided with an inclined surface, from which the first manual valve, the positive pressure regulating valve, the negative pressure regulating valve, the second manual valve, the flow meter, and the pressure gauge all extend.

5. The carburetor leakage testing device according to claim 2, characterized in that, Both the positive pressure check valve and the negative pressure check valve are pilot-operated check valves.

6. The carburetor leakage testing device according to claim 5, characterized in that, The pilot end of the positive pressure check valve is connected to the end of the first manual valve near the positive pressure regulating valve, the first end of the positive pressure check valve is connected to the positive pressure regulating valve, and the second end of the positive pressure check valve is connected to the filter bottle.

7. The carburetor leakage testing device according to claim 5, characterized in that, The pilot end of the negative pressure check valve is connected to the end of the first manual valve near the negative pressure regulating valve, the first end of the negative pressure check valve is connected to the vacuum generator, and the second end of the negative pressure check valve is connected to the filter bottle.

8. The carburetor leakage testing device according to claim 1, characterized in that, The first manual valve is a three-way valve.

9. The carburetor leakage testing device according to claim 1, characterized in that, The second manual valve is a five-way valve.

10. The carburetor leakage testing device according to claim 1, characterized in that, An air filter is also provided at the end of the first manual valve that is connected to the external air source.

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