Vehicle carbon canister multi-station ventilation impedance inspection machine

Abstract

The utility model discloses a multi-station ventilation impedance inspection machine for a vehicle carbon canister. The multi-station ventilation impedance inspection machine comprises an operation table, a jig plate, a detection unit and an automatic marking unit, the jig plate is arranged at the top end of the operation table; the detection unit comprises a carbon canister mounting frame, a positive pressure detection joint, a negative pressure detection joint and a joint driving unit; the automatic marking unit comprises a supporting table, a marking piece, a rotating unit and a marking piece driving unit, the bottom end of the supporting table is installed on the jig plate, the rotating unit is installed on the top of the supporting table, and the marking piece driving unit is installed on the rotating end of the rotating unit; according to the utility model, through the positive pressure detection joint, the negative pressure detection joint and the joint driving unit in the detection units, automatic detection of the air tightness of the carbon canister can be realized, then through the automatic marking unit, the qualified carbon canister can be automatically marked, the automation degree is high, in addition, the plurality of detection units are provided with a plurality of stations, and the detection efficiency is improved. And the overall detection efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicle carbon canister inspection equipment, in particular to a multi-station ventilation impedance inspection machine for vehicle carbon canisters. Background Technique

[0002] An automotive carbon canister is generally installed between the fuel tank and the engine. Since gasoline is a volatile liquid, the fuel tank will be filled with gasoline vapor at room temperature. The function of the fuel evaporation emission control system is to introduce the gasoline vapor into the engine for combustion to prevent the gasoline vapor from volatilizing into the atmosphere. The automotive carbon canister plays an important role in this process because the activated carbon in the automotive carbon canister has an adsorption function. When the vehicle is running or turned off, the gasoline vapor in the fuel tank enters the upper part of the automotive carbon canister through the pipeline, and fresh air enters the automotive carbon canister from the lower part. After the engine is turned off, the gasoline vapor and fresh air are mixed in the canister and stored in the automotive carbon canister; when the engine is started, the electromagnetic valve of the fuel evaporation purification device installed between the automotive carbon canister and the intake manifold opens, and the gasoline vapor in the automotive carbon canister is sucked into the intake manifold and participates in combustion. During the manufacturing process, the airtightness of the automotive carbon canister is one of the important factors to measure the quality. Because the automotive carbon canister needs to suck air into its interior, and since the air contains a large amount of dust, the long-term accumulation of dust inside the automotive carbon canister will damage the automotive carbon canister and affect its service life. When the existing carbon canister impedance inspection machine detects the airtightness, the automation is insufficient, seriously affecting the detection efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to provide a multi-station ventilation impedance inspection machine for vehicle carbon canisters, aiming to solve the problems mentioned above.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A multi-station ventilation impedance inspection machine for vehicle carbon canisters, comprising:

[0006] An operation table;

[0007] A fixture plate, provided at the top of the operation table;

[0008] A plurality of detection units, including a carbon canister mounting rack, a positive pressure detection joint, a negative pressure detection joint and a joint driving unit. The carbon canister mounting rack is installed on the fixture plate, the joint driving unit is provided on one side of the carbon canister mounting rack, and the positive pressure detection joint and the negative pressure detection joint are installed on the output end of the joint driving unit to realize the reciprocating movement control of the detection joint;

[0009] A number of automatic marking units are provided on one side of each carbon canister mounting bracket, including a support table, a marking member, a rotating unit, and a marking member driving unit. The bottom end of the support table is mounted on the jig plate. The rotating unit is mounted on the top of the support table. The marking member driving unit is mounted on the rotating end of the rotating unit. The marking member is mounted on the output end of the marking member driving unit and is used to drive the marking member to reciprocate.

[0010] Preferably, the positive pressure detection joint is connected to a gas supply system. The gas supply system includes a gas storage tank, a flow controller I, and a pressure gauge I that are connected in sequence. The output end of the pressure gauge I is connected to the input end of the positive pressure detection joint.

[0011] Preferably, a residual pressure release valve, an air filter, an oil mist separator, a pressure reducing valve, a pressure switch, a mechanical pressure gauge, and a precision pressure reducing valve I are also connected in sequence between the gas storage tank and the flow controller I.

[0012] Preferably, the negative pressure detection joint is connected to a negative pressure system. The negative pressure system includes a vacuum pump, a flow controller II, and a pressure gauge II that are connected in sequence. The output end of the pressure gauge II is connected to the input end of the negative pressure detection joint.

[0013] Preferably, a precision pressure reducing valve II is provided between the vacuum pump and the flow controller II, and a filter is provided between the pressure gauge II and the negative pressure detection joint.

[0014] Preferably, an ink cartridge is provided at the bottom of the marking member.

[0015] Preferably, a plurality of jig induction sensors are installed on the operation table, and at least one contact terminal is installed at one end of the jig plate. The contact terminal contacts the jig induction sensor to identify the jig plate.

[0016] Preferably, the joint driving unit is a cylinder I. An assembly plate is installed on the output end of the cylinder I. Both the positive pressure detection joint and the negative pressure detection joint are installed on the assembly plate.

[0017] Preferably, the rotating unit is a motor.

[0018] Preferably, the marking member driving unit is a cylinder II.

[0019] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are:

[0020] In the present utility model, the automatic detection of the airtightness of the carbon canister can be realized through the positive pressure detection joint, the negative pressure detection joint and the joint driving unit in the detection unit. Then, through the automatic marking unit, the qualified carbon canisters can be automatically marked, with a relatively high degree of automation. In addition, several detection units have multiple workstations, which can improve the overall detection efficiency. Description of the Drawings

[0021] Figure 1 is a perspective view of the present utility model;

[0022] Figure 2 is one of the perspective views of the operating platform in the present utility model;

[0023] Figure 3 For the present utility model Figure 2 is an enlarged view of part A;

[0024] Figure 4 is the second perspective view of the operating platform in the present utility model.

[0025] Markings in the figure:

[0026] 1. Operating platform; 100. Outer body; 101. Operating screen;

[0027] 2. Fixture plate;

[0028] 3. Detection unit; 301. Carbon canister mounting frame; 302. Positive pressure detection joint; 303. Negative pressure detection joint; 304. Joint driving unit;

[0029] 4. Automatic marking unit; 401. Support table; 402. Marking member; 403. Rotating unit; 404. Marking member driving unit;

[0030] 5. Ink box; 6. Fixture induction sensor; 7. Contact terminal. Detailed Embodiment

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Referring to Figures 1 - 2 , a multi-station ventilation impedance inspection machine for vehicle carbon cans, includes an operation table 1, a fixture plate 2, several detection units 3, several automatic marking units 4, and a PLC control system. The PLC control system is electrically connected to the detection units 3 and the automatic marking units 4 for controlling the automated closed-loop operation of the inspection machine. The equipment mentioned above will be described in detail below.

[0034] An outer body 100 is installed on the top of the operation table 1. The outer body 100 has an open end and can shield the operation table 1 and the carbon can on the operation table 1. An operation screen 101 is also installed on the outer body 100 and is electrically connected to the PLC control system for controlling the operation of the inspection machine.

[0035] The fixture plate 2 is arranged at the top of the operation table 1. An installation structure for installing the fixture plate 2 is provided on the top of the operation table 1. The fixture plate 2 can be detachably installed on the top of the operation table 1 through the installation structure, which is convenient for replacing the model of the fixture plate 2 to facilitate the detection of carbon cans of other models.

[0036] Several detection units 3 are arranged on the fixture plate 2 for detecting the airtightness of the carbon can. The several detection units 3 can improve the work efficiency. Figure 2 In [reference], only two detection units 3 are shown.

[0037] Each detection unit 3 includes a carbon can mounting bracket 301, a positive pressure detection joint 302, a negative pressure detection joint 303, and a joint driving unit 304. A carbon can is installed on the carbon can mounting bracket 301. An interface one and an interface two are provided on the carbon can. The positive pressure detection joint 302 is connected to the interface one to communicate with each other. The positive pressure detection joint 302 ventilates the inside of the carbon can, and when the flow rate reaches the set value, the pressure at the interface one is detected. The negative pressure detection joint 303 is connected to the interface two to communicate with each other. The negative pressure detection joint 303 generates a negative pressure, and when the flow rate reaches the set value, the pressure at the interface two is detected. The airtightness of the carbon can is detected by detecting the positive and negative pressures in the carbon can.

[0038] The canister mounting bracket 301 is mounted on the jig plate 2. The joint driving unit 304 is disposed on one side of the canister mounting bracket 301. The positive pressure detection joint 302 and the negative pressure detection joint 303 are mounted on the output end of the joint driving unit 304. More specifically, the joint driving unit 304 is a first cylinder. An assembly plate is mounted on the output end of the first cylinder. Both the positive pressure detection joint 302 and the negative pressure detection joint 303 are mounted on the assembly plate. The first cylinder can be driven to operate by an electrical signal through the PLC control system. The output shaft of the first cylinder can drive the positive pressure detection joint 302 and the negative pressure detection joint 303 to move, so as to realize the reciprocating movement control of the positive pressure detection joint 302 and the negative pressure detection joint 303.

[0039] An alarm lamp is mounted on the outer body 100. The alarm lamp, the positive pressure detection joint 302, and the negative pressure detection joint 303 are all electrically connected to the PLC control system. During detection, the interface II is in a closed state. The positive pressure detection joint 302 is used to ventilate the inside of the canister. When the flow rate reaches the set value, the pressure at the detection interface I is detected. When the detected value deviates from the preset threshold value in the PLC control system, the alarm lamp sounds, indicating that the airtightness of the canister is unqualified.

[0040] When the positive pressure detection joint 302 detects that the canister is qualified, at this time, the interface I is in a closed state, and the negative pressure detection joint 303 is activated. The negative pressure detection joint 303 is connected to the interface II. The negative pressure detection joint 303 generates negative pressure. When the flow rate reaches the set value, the pressure at the detection interface II is detected. When the detected value deviates from the preset threshold value in the PLC control system, the alarm lamp sounds, indicating that the airtightness of the canister is unqualified. By detecting the positive pressure and negative pressure inside the canister, the airtightness inside the canister can be detected.

[0041] A plurality of automatic marking units 4 are used to mark the qualified ones. The automatic marking unit 4 is disposed on one side of each canister mounting bracket 301. The automatic marking unit 4 includes a support table 401, a marking member 402, a rotating unit 403, and a marking member driving unit 404. The rotating unit 403 is a motor, and the marking member driving unit 404 is a second cylinder.

[0042] The bottom end of the support table 401 is mounted on the jig plate 2. The rotating unit 403 is mounted on the top of the support table 401. The marking member driving unit 404 is mounted on the rotating end of the rotating unit 403. The marking member 402 is mounted on the output end of the marking member driving unit 404 and is used to drive the marking member 402 to reciprocate. When the airtightness detection of the canister is in a qualified state, the rotating unit 403 drives the marking member driving unit 404 to rotate, and the output shaft of the marking member driving unit 404 extends, driving the marking member 402 to move towards the direction of the canister to mark the qualified canister.

[0043] In this embodiment, the automatic detection of the airtightness of the carbon canister can be achieved through the positive pressure detection joint 302, the negative pressure detection joint 303, and the joint driving unit 304 in the detection unit 3. Then, through the automatic marking unit 4, the carbon canisters that pass the detection can be automatically marked, with a relatively high degree of automation. In addition, several detection units 3 have multiple stations, which can improve the overall detection efficiency.

[0044] In a possible embodiment, the positive pressure detection joint 302 is connected to a gas supply system, and the gas supply system is installed inside the operation table 1. The gas supply system includes a gas storage tank, a flow controller 1, and a pressure gauge 1 that are connected in sequence. The output end of the pressure gauge 1 is connected to the input end of the positive pressure detection joint 302. The gas storage tank provides the air pressure required by the positive pressure detection joint 302. The flow controller 1 is electrically connected to the PLC control system, and can control the flow rate of the air flow, so that the detected value of the positive pressure detection joint 302 can be compared with a preset value.

[0045] A residual pressure release valve, an air filter, an oil mist separator, a pressure reducing valve, a pressure switch, a mechanical pressure gauge, and a precision pressure reducing valve 1 are also connected in sequence between the gas storage tank and the flow controller 1, improving the safety of the gas supply system.

[0046] In a possible embodiment, the negative pressure detection joint 303 is connected to a negative pressure system, and the negative pressure system is installed inside the operation table 1. The negative pressure system includes a vacuum pump, a flow controller 2, and a pressure gauge 2 that are connected in sequence. The output end of the pressure gauge 2 is connected to the input end of the negative pressure detection joint 303. When the vacuum pump operates, it can generate negative pressure. The flow controller 2 is electrically connected to the PLC control system, and can control the flow rate of the air flow, so that the detected value of the negative pressure detection joint 303 can be compared with a preset value.

[0047] A precision pressure reducing valve 2 is provided between the vacuum pump and the flow controller 2, and a filter is provided between the pressure gauge 2 and the negative pressure detection joint 303, improving the safety of the negative pressure system.

[0048] In a possible embodiment, as Figure 3 shown, an ink box 5 is provided at the bottom of the marking member 402. In this embodiment, the ink box 5 can store printing and dyeing materials. The marking member 402 is placed in the ink box 5, and the ink box 5 can provide dyes for the marking member 402.

[0049] In a possible embodiment, as Figure 4As shown in the figure, a plurality of fixture induction sensors 6 are installed on the operation table 1. At least one contact terminal 7 is installed at one end of the fixture plate 2. The contact terminal 7 contacts the fixture induction sensor 6 to identify the fixture plate 2. In this embodiment, the number of contact terminals 7 at the bottom of different fixture plates 2 is different. Different types of fixture plates 2 can be identified by the different number of contacts between the contact terminal 7 and the fixture induction sensor 6.

Claims

1. A multi-station ventilation impedance tester for a vehicle carbon canister, characterized in that: include: Operating table (1); A jig plate (2) is arranged on the top of the operating table (1); A plurality of detection units (3), comprising a carbon canister mounting frame (301), a positive pressure detection joint (302), a negative pressure detection joint (303) and a joint drive unit (304), wherein the carbon canister mounting frame (301) is mounted on the fixture plate (2), the joint drive unit (304) is arranged on one side of the carbon canister mounting frame (301), and the positive pressure detection joint (302) and the negative pressure detection joint (303) are mounted on the output end of the joint drive unit (304) to realize reciprocating movement control of the detection joint; A plurality of automatic marking units (4) are arranged on one side of each of the carbon canister mounting frames (301), and include a support platform (401), a marking member (402), a rotating unit (403), and a marking member driving unit (404); the bottom end of the support platform (401) is mounted on the fixture plate (2); the rotating unit (403) is mounted on the top of the support platform (401); the marking member driving unit (404) is mounted on the rotating end of the rotating unit (403); and the marking member (402) is mounted on the output end of the marking member driving unit (404) for driving the marking member (402) to move back and forth.

2. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 1, characterized in that: The positive pressure detection connector (302) is connected to an air supply system, which includes an air storage tank, a flow controller 1 and a pressure gauge 1 which are connected in sequence, and the output end of the pressure gauge 1 is connected to the input end of the positive pressure detection connector (302).

3. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 2, characterized in that: A residual pressure release valve, an air filter, an oil mist separator, a pressure reducing valve, a pressure switch, a mechanical pressure gauge and a precision pressure reducing valve are also connected in sequence between the gas storage tank and the flow controller one.

4. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 1, characterized in that: The negative pressure detection connector (303) is connected to a negative pressure system, which includes a vacuum pump, a second flow controller and a second pressure gauge which are connected in sequence, and the output end of the second pressure gauge is connected to the input end of the negative pressure detection connector (303).

5. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 4, characterized in that: A second precision pressure reducing valve is provided between the vacuum pump and the second flow controller, and a filter is provided between the second pressure gauge and the negative pressure detection connector (303).

6. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 1, characterized in that: A printing box (5) is provided at the bottom of the marking member (402).

7. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 1, characterized in that: A plurality of jig induction sensors (6) are installed on the operating table (1), and at least one contact terminal (7) is installed at one end of the jig plate (2), wherein the contact terminal (7) contacts the jig induction sensor (6) for identifying the jig plate (2).

8. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 1, characterized in that: The joint drive unit (304) is a cylinder 1, an assembly plate is installed on the output end of the cylinder 1, and the positive pressure detection joint (302) and the negative pressure detection joint (303) are both installed on the assembly plate.

9. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 1, characterized in that: The rotating unit (403) is a motor.

10. The multi-station ventilation impedance testing machine for vehicle carbon canister according to claim 9, characterized in that: The marking member driving unit (404) is a second cylinder.

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