A device and method for detecting sealing performance of electric rice cooker

Abstract

The invention relates to the field of electrical appliance performance detection, and in particular to a sealing performance detection device and method for an electric rice cooker. The device comprises a support plate, a placement seat, a column, a top plate, a cylinder, a lifting mechanism, a sealing test mechanism, a linkage mechanism, an airtightness detection mechanism, a driving mechanism and a gas pressure gauge. The invention can simultaneously test the sealing of a connection between a cover and a body of an electric rice cooker and a connection between the cover and an exhaust valve of the electric rice cooker. In the process of a lifting rod descending with the cylinder, the linkage mechanism drives two semi-annular frames to approach each other and splice them into an annular frame. The annular frame is pressed against the connection between the cover and the body of the electric rice cooker under the drive of the linkage mechanism. At this time, the leakage position can be accurately located by observing the color change of anhydrous copper sulfate powder in a No. 1 transparent test tube. The relative position of the annular frame to the connection can be changed under the drive of the driving mechanism, thereby avoiding the existence of a test blind spot.

Description

Technical Field

[0001] The invention relates to the field of electrical appliance performance detection, and in particular to a device and method for detecting the sealing performance of an electric rice cooker. Background Art

[0002] Most of the current electric rice cookers are multifunctional electric rice cookers, which have a pressurizing function while retaining the cooking function. The above two functions have high requirements on the sealing performance of the electric rice cooker. Therefore, it is often necessary to randomly inspect a part of the electric rice cookers to test their sealing performance before leaving the factory.

[0003] The following are two common methods for testing the sealing of rice cookers: 1. Steam test: Add water to the rice cooker and heat it to boiling, then observe whether there is steam leaking from the connection between the lid and the cooker body. If a large amount of steam leaks, it means that the sealing is poor; 2. Pressure test (applicable to rice cookers with pressure function): Use special pressure testing equipment to measure the airtightness of the rice cooker under pressurized state, or observe whether the rice cooker can maintain the required pressure level when it is in high-pressure cooking mode without obvious pressure drop.

[0004] The above-mentioned testing method has the following problems: when the sealing performance of the rice cooker is tested by the steam test method, there are limitations in observing the steam leakage with the naked eye. When the amount of steam leakage is small, it is difficult to observe with the naked eye, and the exact leakage location is also difficult to determine in this case; when performing an air pressure test, different testing equipment needs to be used to test its air tightness and pressure stability, which makes the testing process more complicated. Summary of the invention

[0005] In order to solve the above problems, the present invention adopts the following technical scheme: a device for detecting the sealing performance of an electric rice cooker, comprising a support plate, a placement seat for fixing the electric rice cooker is fixedly connected to the support plate, four columns are fixedly connected to the support plate in a matrix arrangement, the top ends of the four columns are commonly fixedly connected to a top plate, the upper end of the top plate is fixedly connected to a cylinder, and the piston rod of the cylinder penetrates downward through the top plate and is fixedly connected to a lifting mechanism.

[0006] The lifting mechanism includes a lifting rod and a connecting ring, a rectangular tube is rotatably sleeved on the lifting rod, rectangular rods are slidably sleeved on both the left and right ends of the rectangular tube, the ends of the two rectangular rods away from each other slide through the same connecting ring, the ends of the rectangular rods away from the rectangular tube are fixedly connected with a rectangular connecting block, the lower end surface of the rectangular connecting block is fixedly connected with a No. 1 spring rod, the lower ends of the two No. 1 spring rod movable sections are fixedly connected with semi-ring frames, and the two semi-ring frames are spliced ​​to form a ring frame that matches the rice cooker.

[0007] The semi-ring frame is connected to a sealing test mechanism for detecting the sealing of the connection between the rice cooker cover and the rice cooker body, the lifting rod is connected to a linkage mechanism for making the two semi-ring frames approach or move away from each other, the lower end of the lifting rod is also connected to an airtightness detection mechanism for testing the sealing of the exhaust valve on the rice cooker, a gas pressure gauge is fixedly arranged on the inner side of the rice cooker cover, and the lifting rod and the rectangular tube are jointly connected to a driving mechanism for driving the intermittent rotation of the ring frame after splicing is completed.

[0008] Preferably, the sealing testing mechanism includes a semi-annular sealing ring, the inner wall of the semi-annular frame is provided with a semi-annular groove, a semi-annular sealing ring is fixedly connected in the semi-annular groove, a plurality of one-to-one corresponding air holes are evenly penetrated through the semi-annular sealing ring and the side wall of the semi-annular frame, and an observation assembly is connected to each of the air holes.

[0009] Preferably, the observation assembly includes an air pipe, which is fixedly connected to the vent hole on the semi-ring frame. The end of the air pipe away from the semi-ring frame is fixedly provided with a rubber connecting sleeve. The end of the rubber connecting sleeve away from the semi-ring frame is fixedly connected to a transparent test tube, and anhydrous copper sulfate powder for detecting water vapor is placed in the transparent test tube.

[0010] Preferably, the linkage mechanism includes a circular plate, the bottom end of the lifting rod is fixedly connected to the circular plate, the side wall of the lifting rod is rotatably sleeved with a circular ring, the circular ring is located below the rectangular tube, the side wall of the lifting rod and the position between the circular ring and the circular plate is cooperatively sleeved with a rectangular seat, and the rectangular seat and the lifting rod can slide up and down and rotate relative to each other, the rectangular seat and the rectangular rod are hingedly connected by a hinge plate, and the side wall of the circular ring is symmetrically connected to the traction assembly front and back.

[0011] Preferably, the traction assembly includes a folding rod, the horizontal section of the folding rod is fixedly connected to the circular ring, the vertical section of the folding rod slides up and down and is connected to a U-shaped seat, the U-shaped seat opens downward and the lower ends of the vertical sections are rotatably connected to a square rod, the lower ends of the two square rods are rotatably connected to connecting blocks, the two connecting blocks are fixedly connected to the adjacent ends of the two semi-ring frames, the interiors of the two connecting blocks are commonly connected to a closed module, the adjacent end surfaces of the two No. 1 spring rod movable sections are fixedly connected to abutment plates, the bottom end of the vertical section of the folding rod is fixedly connected to a locking sleeve, the locking sleeve is in a sun-shape and is slidably sleeved on the two square rods, and the two notches on the locking sleeve cooperate with the two vertical sections of the U-shaped seat.

[0012] Preferably, the closed module includes a mounting groove, a mounting groove is provided on the end surface of the connecting block close to the axis of the semi-ring frame, a rubber sheet is fixedly connected in the mounting groove on the left connecting block, and an insert sheet is fixedly connected in the mounting groove on the right connecting block, the insert sheet and the rubber sheet are staggered with each other, and the distance between the rubber sheet and the axis of the semi-ring frame is closer than the distance between the insert sheet and the axis of the semi-ring frame.

[0013] Preferably, the air tightness detection mechanism includes a connecting plate, one end of which is fixedly sleeved on the bottom end of the lifting rod, and the connecting plate is located between the rectangular connecting seat and the circular plate, the other end of the connecting plate is fixedly connected to a No. 2 spring rod, the bottom end of the movable section of the No. 2 spring rod is fixedly connected to a cylindrical cover, an opening is provided below the cylindrical cover, and a sealing ring is fixedly connected to the lower opening of the cylindrical cover, the side wall of the cylindrical cover is also connected to an observation assembly, and anhydrous copper sulfate powder is also placed in a transparent test tube on the side wall of the cylindrical cover.

[0014] Preferably, the driving mechanism includes an I-shaped frame, the upper end of the lifting rod passes through the I-shaped frame from top to bottom and is fixedly connected to the I-shaped frame, the longitudinal section of the I-shaped frame is slidably connected between two corresponding front and rear columns, the lower end surface of the I-shaped frame is rotatably connected to a connecting tube, the lower end of the connecting tube is fixedly connected to the rectangular tube, and an intermittent rotating component is connected to the connecting tube.

[0015] Preferably, the intermittent rotation component includes a linkage gear, which is fixedly sleeved on the connecting pipe, and the upper end surface of the I-shaped frame is fixedly connected to a drive motor, and the drive shaft of the drive motor passes through the I-shaped frame and is fixedly connected to the incomplete gear, and the incomplete gear is meshed and connected with the linkage gear.

[0016] Preferably, a method for detecting the sealing performance of an electric cooker is completed by cooperating with the above-mentioned device for detecting the sealing performance of an electric cooker, and comprises the following steps:

[0017] S1. Preparation: Power on the rice cooker to be tested and add water into its inner pot, start the heating mode to heat the water to boiling. The heating mode here can be any cooking mode.

[0018] S2. Sealing performance test: The lifting mechanism is driven down by the cylinder piston rod, and then the two semi-ring frames are driven to approach each other and abut against the connection between the rice cooker lid and the cooker body through the linkage mechanism, and finally spliced ​​into a semi-ring frame. At the same time, the descent of the lifting rod will also drive the airtightness detection mechanism to abut against the exhaust valve on the rice cooker lid. At this time, the sealing performance of this place is tested by the sealing test mechanism, and whether there is water vapor leakage at the exhaust valve is tested by the airtightness detection mechanism.

[0019] S3. Switching of test points: After a single test is completed, the cylinder drives the lifting rod to rise to reset the two half-ring frames, and then the driving mechanism drives the rectangular tube to rotate a certain angle, thereby adjusting the position of each sealing test mechanism to prevent the occurrence of a dead angle in the test. After that, the sealing test mechanism is continued to detect the water vapor leakage at the connection between the rice cooker lid and the cooker body. For the transparent test tube where the leakage has been detected, it needs to be replaced with a new transparent test tube filled with anhydrous copper sulfate powder.

[0020] S4. Result analysis: During the test, observe the indication of the gas pressure gauge on the one hand, and observe the changes in the indication of the anhydrous copper sulfate powder in the transparent test tube on the other hand. If the indication of the gas pressure gauge is always above the target value after stabilization and there is no obvious pressure drop, and at the same time, the anhydrous copper sulfate powder in each transparent test tube has not changed, it means that the sealing performance of the rice cooker is good. If the indication of the gas pressure gauge drops significantly during the test, it means that the sealing of the rice cooker is defective. During this process, observe the changes in the anhydrous copper sulfate powder in the transparent test tube. If the anhydrous copper sulfate powder in a transparent test tube changes from white to blue, it means that there is a leak at the connection between the rice cooker lid and the cooker body.

[0021] The beneficial effects of the present invention are as follows: 1. When the lifting rod of the present invention descends with the cylinder, the linkage mechanism drives the two half-ring frames to approach each other and splice them into a ring frame. The ring frame is pressed against the connection between the cover and the body of the rice cooker under the drive of the linkage mechanism. At this time, the leakage position can be accurately located by observing the color change of the anhydrous copper sulfate powder in the transparent test tube, and the relative position of the ring frame and the connection can be changed under the drive of the driving mechanism, thereby avoiding the existence of a test blind spot.

[0022] 2. The present invention tests the pressure and air tightness of the rice cooker under the pressurized state through the barometric pressure gauge and the air tightness detection mechanism in the rice cooker, and tests the sealing performance of the connection between the rice cooker cover and the rice cooker body through the air tightness testing mechanism. The above multiple tests are carried out simultaneously and do not interfere with each other, thereby simplifying the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below with reference to the accompanying drawings and examples.

[0024] Figure 1 The invention is a three-dimensional structural schematic diagram of the electric rice cooker sealing performance detection device in operation.

[0025] Figure 2 The present invention is a schematic diagram of the three-dimensional structure of the device for detecting the sealing performance of a rice cooker provided by the present invention.

[0026] Figure 3 It is a three-dimensional structural schematic diagram of a No. 1 spring rod, a semi-ring frame and a sealing test mechanism of the present invention.

[0027] Figure 4 The present invention Figure 3 Top view of the .

[0028] Figure 5 The present invention Figure 4 A partial enlarged view of point A in the middle.

[0029] Figure 6The present invention is a three-dimensional cross-sectional view of the local structure of the device for detecting the sealing performance of a rice cooker provided by the present invention.

[0030] Figure 7 The present invention Figure 7 A partial enlarged view of point B in the middle.

[0031] Figure 8 The present invention is a three-dimensional structural schematic diagram of the local structure of the electric rice cooker sealing performance detection device provided by the present invention.

[0032] Fig. 9 It is an exploded view of an electric rice cooker and a gas pressure gauge which are objects of the present invention.

[0033] In the figure: 1. Placement seat; 2. Column; 3. Top plate; 4. Cylinder; 5. Lifting mechanism; 51. Lifting rod; 52. Rectangular tube; 53. Rectangular rod; 54. Connecting ring; 55. Rectangular connecting block; 56. No. 1 spring rod; 57. Semi-ring frame; 6. Sealing test mechanism; 61. Semi-ring sealing ring; 62. Ventilation hole; 63. Observation assembly; 631. Air pipe; 632. Rubber connecting sleeve; 633. Transparent test tube; 7. Linking mechanism; 71. Round plate; 72. Round ring; 73. Rectangular connecting seat; 74. Articulated plate; 75. Traction assembly; 751. Folding rod; 752. U-shaped seat; 753. Square rod; 754. Connecting block; 755. Enclosed module; 7551. Mounting groove; 7552. Rubber sheet; 7553. Insert; 756. Abutment plate; 757. Lock sleeve; 8. Air tightness detection mechanism; 81. Connecting plate; 82. No. 2 spring rod; 83. Column cover; 84. Sealing ring; 9. Driving mechanism; 91. I-shaped frame; 92. Connecting pipe; 93. Intermittent rotation assembly; 931. Linking gear; 932. Driving motor; 933. Incomplete gear; 10. Gas pressure gauge. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

[0035] See also Figure 1 A device for detecting the sealing performance of an electric rice cooker comprises a support plate, to which a placement seat 1 for fixing the electric rice cooker is fixedly connected, four columns 2 are fixedly connected to the support plate in a matrix arrangement, a top plate 3 is fixedly connected to the top ends of the four columns 2, a cylinder 4 is fixedly connected to the upper end of the top plate 3, a piston rod of the cylinder 4 passes through the top plate 3 downward and is fixedly connected to a lifting mechanism 5.

[0036] See also Figure 2The lifting mechanism 5 includes a lifting rod 51 and a connecting ring 54. A rectangular tube 52 is rotatably sleeved on the lifting rod 51. The rectangular tube 52 is horizontally arranged, and the left and right ends of the rectangular tube 52 are open. Rectangular rods 53 are slidably sleeved on the left and right ends of the rectangular tube 52. The ends of the two rectangular rods 53 away from each other slide through the same connecting ring 54. A rectangular connecting block 55 is fixedly connected to the end of the rectangular rod 53 away from the rectangular tube 52. A No. 1 spring rod 56 is fixedly connected to the lower end surface of the rectangular connecting block 55. The lower ends of the movable sections of the two No. 1 spring rods 56 are fixedly connected to semi-ring frames 57. The two semi-ring frames 57 are spliced ​​to form a ring frame that matches the rice cooker.

[0037] See also Figure 1 , Figure 2 and Fig. 9 The semi-ring frame 57 is connected with a sealing test mechanism 6 for detecting the sealing of the connection between the cover and the cooker body, the lifting rod 51 is connected with a linkage mechanism 7 for making the two semi-ring frames 57 approach or move away from each other, the lower end of the lifting rod 51 is also connected with an airtightness detection mechanism 8 for testing the sealing of the exhaust valve on the rice cooker, a gas pressure gauge 10 is fixedly arranged on the inner side of the rice cooker cover, and the lifting rod 51 and the rectangular tube 52 are jointly connected with a driving mechanism 9 for driving the intermittent rotation of the ring frame after splicing is completed.

[0038] During specific operation, in the initial state, the piston rod of the cylinder 4 is in a retracted state, the lifting rod 51 is at the highest point, and the two rectangular rods 53 are far away from each other. When testing, the rice cooker is fixed on the placement seat 1, powered on, and water is added to its inner pot, and then the cooker lid is closed and the heating mode is started to boil the water.

[0039] Afterwards, the lifting rod 51 is driven to descend through the piston rod of the cylinder 4, and the two No. 1 spring rods 56 also descend synchronously, driving the two semi-ring frames 57 to descend synchronously. Under the restriction of the linkage mechanism 7, the two semi-ring frames 57 stop descending after descending to the connection between the rice cooker cover and the cooker body. At this time, the airtightness detection mechanism 8 also abuts against the exhaust valve on the rice cooker cover. Thereafter, as the lifting rod 51 continues to descend, the two rectangular rods 53 are driven to approach each other through the linkage mechanism 7, and then the two semi-ring frames 57 are brought close to each other and finally spliced ​​into an annular frame, which abuts against the connection between the rice cooker cover and the cooker body. The sealing performance of the connection is detected by the sealing testing mechanism 6, and at the same time, the airtightness detection mechanism 8 is used to detect whether there is water vapor leakage at the exhaust valve.

[0040] After the single test is completed, the cylinder 4 drives the lifting rod 51 to rise so that the two semi-ring frames 57 are reset, and then the driving mechanism 9 drives the rectangular tube 52 to rotate a certain angle, and then the rectangular tube 52, the rectangular rod 53, the connecting ring 54, the rectangular connecting block 55 and the No. 1 spring rod 56 also rotate a certain angle synchronously, driving the two semi-ring frames 57 to rotate the same angle and then the cylinder 4 drives the lifting rod 51 to descend, so that the two semi-ring frames 57 are spliced ​​into a ring frame again and abut against the connection between the rice cooker cover and the cooker body. Due to the previous rotation of the semi-ring frames 57, the position of the sealing test mechanism 6 this time is also changed compared with the position of the last test. In this way, the sealing test mechanism 6 can be rotated relative to the connection between the rice cooker cover and the cooker body, thereby preventing the occurrence of a test blind spot.

[0041] During the above-mentioned sealing performance test, the indication of the gas pressure gauge 10 is observed in real time. If the indication of the gas pressure gauge 10 is always above the target value after stabilization and there is no obvious pressure drop, it means that the sealing performance of the rice cooker is normal, otherwise it means that the sealing of the rice cooker is defective.

[0042] See also Figure 3 , Figure 6 and Figure 7 The sealing test mechanism 6 includes a semi-annular sealing ring 61, and the inner wall of the semi-annular frame 57 is provided with a semi-annular groove, and the semi-annular sealing ring 61 is fixedly connected in the semi-annular groove. The semi-annular sealing ring 61 and the side wall of the semi-annular frame 57 are evenly penetrated with a plurality of one-to-one corresponding ventilation holes 62, and the ventilation holes 62 are connected to observation components 63.

[0043] See also Figure 6 and Figure 7 The observation assembly 63 includes an air pipe 631, which is fixedly connected to the vent hole 62 on the semi-ring frame 57. The end of the air pipe 631 away from the semi-ring frame 57 is fixedly sleeved with a rubber connecting sleeve 632. The end of the rubber connecting sleeve 632 away from the semi-ring frame 57 is fixedly connected to a transparent test tube 633, and anhydrous copper sulfate powder for detecting water vapor is placed in the transparent test tube 633.

[0044] During specific operation, after the two half ring frames 57 are spliced ​​into a ring frame and abutted against the connection between the lid and the body of the rice cooker, the rice cooker continues to heat the hot water therein. If there is a leakage at a certain connection between the lid and the body of the rice cooker, water vapor will enter the transparent test tube 633 along the vent 62, thereby causing the anhydrous copper sulfate powder in the transparent test tube 633 to change from white to blue, thereby accurately locating the leakage point. If the color of the anhydrous copper sulfate powder does not change, it means that the sealing performance at that location is good and there is no water vapor leakage.

[0045] See also Figure 8The linkage mechanism 7 includes a circular plate 71, the bottom end of the lifting rod 51 is fixedly connected to the circular plate 71, the side wall of the lifting rod 51 is rotatably sleeved with a circular ring 72, the circular ring 72 is located below the rectangular tube 52, and the side wall of the lifting rod 51 and the position between the circular ring 72 and the circular plate 71 is cooperatively sleeved with a rectangular seat 73, the rectangular seat 73 and the lifting rod 51 can slide up and down relative to each other and rotate relative to each other, the rectangular seat 73 and the rectangular rod 53 are hingedly connected by a hinge plate 74, and the side wall of the circular ring 72 is symmetrically connected to the traction assembly 75 front and back.

[0046] See also Figure 6 and Figure 8 The traction assembly 75 includes a folding rod 751, the horizontal section of the folding rod 751 is fixedly connected to the ring 72, the vertical section of the folding rod 751 slides up and down and is connected with a U-shaped seat 752, the U-shaped seat 752 opens downward and the lower ends of the vertical sections are rotatably connected to square rods 753, the lower ends of the two square rods 753 are rotatably connected to connecting blocks 754, the two connecting blocks 754 are fixedly connected to the adjacent ends of the two semi-ring frames 57, the interiors of the two connecting blocks 754 are commonly connected to a closed module 755, the end surfaces of the movable sections of the two No. 1 spring rods 56 are fixedly connected to abutment plates 756, the bottom end of the vertical section of the folding rod 751 is fixedly connected to a locking sleeve 757, the locking sleeve 757 is in the shape of a Japanese character and is slidably fitted on the two square rods 753, and the two notches on the locking sleeve 757 cooperate with the two vertical sections of the U-shaped seat 752.

[0047] See also Figure 4 , Figure 5 and Figure 8 The closed module 755 includes a mounting groove 7551, and a mounting groove 7551 is opened on the end surface of the connecting block 754 close to the axis of the semi-ring frame 57. A rubber sheet 7552 is fixedly connected in the mounting groove 7551 on the left connecting block 754, and an insert sheet 7553 is fixedly connected in the mounting groove 7551 on the right connecting block 754. The insert sheet 7553 and the rubber sheet 7552 are staggered with each other, and the distance between the rubber sheet 7552 and the axis of the semi-ring frame 57 is closer than the distance between the insert sheet 7553 and the axis of the semi-ring frame 57.

[0048] See also Figure 4-Figure 8When working specifically, in the initial state, the two rectangular rods 53 are away from each other, the locking sleeve 757 is sleeved on the U-shaped seat 752, and the lower ends of the two square rods 753 are away from each other. During the test, the cylinder 4 drives the lifting rod 51 to descend, thereby indirectly driving the two No. 1 spring rods 56 to descend synchronously. When the abutment plate 756 abuts against the rice cooker cover, the semi-ring frame 57 no longer descends. As the lifting rod 51 continues to descend, the No. 1 spring rod 56 changes from descending to being compressed. At this time, as the lifting rod 51 continues to descend, the rectangular connecting seat 73 will be driven to slide down along the lifting rod 51 through the circular ring 72, so that the angle between the two hinged plates 74 is reduced, and then the two rectangular rods 53 are moved closer to each other, and the two No. 1 spring rods 56 are driven closer to each other through the two rectangular connecting blocks 55, so that the two semi-ring frames 57 are closer to each other and spliced ​​into a ring frame.

[0049] When the circular ring 72 descends, it will also drive the locking sleeve 757 to slide downward along the square rod 753, thereby bringing the lower ends of the two square rods 753 closer together and further tightening the two connecting blocks 754. During this process, the insert 7553 will be inserted into the installation groove 7551, thereby causing the rubber sheet 7552 to deform slightly and abut against the side wall of the rice cooker, thereby achieving a better sealing effect. After that, when a single test is completed, the initial stage of the lifting rod 51 rising will drive the No. 1 spring rod 56 to recover. At this time, the abutment plate 756 is still abutted against the rice cooker cover. During this process, the circular ring 72 and the circular plate 71 will rise synchronously with the lifting rod 51, and then drive the locking sleeve 757 to slide upward along the square rod 753 to the two vertical sections of the U-shaped seat 752 through the folding rod 751, thereby releasing the lock on the other rod 753. Then, when the No. 1 spring rod 56 is restored, the lifting rod 51 continues to rise and will drive the rectangular connecting seat 73 to rise synchronously through the circular plate 71 and the airtightness detection mechanism 8, and then drive the two rectangular rods 53 away from each other through the hinged plate 74, and finally restore the two semi-ring frames 57 to the position before splicing.

[0050] See also Figure 2 The air tightness detection mechanism 8 includes a connecting plate 81, one end of which is fixedly sleeved on the lower end of the lifting rod 51, and the connecting plate 81 is located between the rectangular connecting seat 73 and the circular plate 71. The other end of the connecting plate 81 is fixedly connected to a No. 2 spring rod 82, and the bottom end of the movable section of the No. 2 spring rod 82 is fixedly connected to a cylindrical cover 83. An opening is opened at the bottom of the cylindrical cover 83, and a sealing ring 84 is fixedly connected to the lower end opening of the cylindrical cover 83. The side wall of the cylindrical cover 83 is also connected to the observation component 63, and anhydrous copper sulfate powder is also placed in the transparent test tube 633 on the side wall of the cylindrical cover 83.

[0051] During specific operation, in the test process, the lifting rod 51 descends through the circular ring 72 to drive the rectangular connecting seat 73 to descend synchronously, and then drives the second spring rod 82 and the cylindrical cover 83 to descend synchronously through the connecting plate 81, and finally makes the sealing ring 84 abut against the periphery of the exhaust valve on the rice cooker cover. Then observe the anhydrous copper sulfate powder in the transparent test tube 633 on the cylindrical cover 83. If the anhydrous copper sulfate powder turns blue, it means that the exhaust valve is not airtight enough and there is water vapor leakage. Otherwise, it means that the exhaust valve is airtight.

[0052] See also Figure 2 and Figure 6 The driving mechanism 9 includes an I-shaped frame 91, the upper end of the lifting rod 51 passes through and is fixedly connected to the I-shaped frame 91, the longitudinal section of the I-shaped frame 91 is slidably connected between the two corresponding front and rear columns 2, and the lower end surface of the I-shaped frame 91 is rotatably connected to a connecting pipe 92, the lower end of the connecting pipe 92 is fixedly connected to the rectangular tube 52, and an intermittent rotating component 93 is connected to the connecting pipe 92.

[0053] See also Figure 2 The intermittent rotation component 93 includes a linkage gear 931, which is fixedly sleeved on the connecting pipe 92. The upper end surface of the I-shaped frame 91 is fixedly connected to a driving motor 932. The driving shaft of the driving motor 932 passes through the I-shaped frame 91 and is fixedly connected to an incomplete gear 933. The incomplete gear 933 is meshed with the linkage gear 931.

[0054] During specific operation, the driving motor 932 drives the incomplete gear 933 to rotate, and then drives its gear teeth to contact the connecting gear 931, so that the connecting gear 931 rotates a certain angle. The rotation of the connecting gear 931 will drive the rectangular tube 52, the rectangular rod 53 and the connecting ring 54 to rotate synchronously through the connecting tube 92, thereby driving the semi-ring frame 57 to rotate a certain angle through the No. 1 spring rod 56, so as to adjust the position of the transparent test tube 633 to avoid the generation of blind spots in the test.

[0055] A method for detecting the sealing performance of an electric rice cooker is completed by the above-mentioned electric rice cooker sealing performance detection device, comprising the following steps:

[0056] S1. Preparation: Power on the rice cooker to be tested and add water into its inner pot, start the heating mode to heat the water to boiling. The heating mode here can be any cooking mode.

[0057] S2, sealing performance test: the lifting rod 51 is driven down by the piston rod of the cylinder 4, and the two No. 1 spring rods 56 are also driven down synchronously, thereby driving the two semi-ring frames 57 to be driven down synchronously. Then, as the lifting rod 51 continues to descend, the two semi-ring frames 57 are driven to approach each other and abut against the connection between the rice cooker cover and the cooker body through the linkage mechanism 7, and finally spliced ​​into a ring frame. At the same time, the airtightness testing mechanism is also abutted against the exhaust valve on the rice cooker cover. At this time, the sealing performance of the place is tested by the sealing testing mechanism 6, and whether there is water vapor leakage at the exhaust valve is tested by the airtightness testing mechanism 8.

[0058] S3, test point switching: after a single test is completed, the cylinder 4 drives the lifting rod 51 to rise to reset the two semi-ring frames 57, and then the driving mechanism 9 drives the rectangular tube 52 to rotate a certain angle, thereby adjusting the position of each sealing test mechanism 6 to prevent the occurrence of a test dead angle. After that, the sealing test mechanism 6 continues to detect the water vapor leakage at the connection between the rice cooker cover and the rice cooker body. For the transparent test tube 633 where the leakage has been detected, it needs to be replaced with a new transparent test tube 633 filled with anhydrous copper sulfate powder.

[0059] S4. Result analysis: During the test, the indication of the gas pressure gauge 10 is observed on the one hand, and the indication change of the anhydrous copper sulfate powder in the transparent test tube 633 is observed on the other hand. If the indication of the gas pressure gauge 10 is always above the target value after stabilization and there is no obvious pressure drop, and at the same time, the anhydrous copper sulfate powder in each transparent test tube 633 does not change, it means that the sealing performance of the rice cooker is good. If the indication of the gas pressure gauge 10 decreases significantly during the test, it means that the sealing of the rice cooker is defective. During this process, the changes of the anhydrous copper sulfate powder in the transparent test tube 633 are observed. If the anhydrous copper sulfate powder in a transparent test tube 633 changes from white to blue, it means that there is a leak at the connection between the rice cooker cover and the cooker body.

[0060] In the description of the embodiments of the present invention, it should be noted that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "oil level", "top", "bottom", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention 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 cannot be understood as a limitation on the embodiments of the present invention. In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", and "multiple groups" mean two or more.

[0061] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The embodiments of this specific implementation mode are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention. The preferred embodiments of the invention are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rice cooker sealing performance detection device, characterized in that: The invention comprises a support plate, wherein a placement seat (1) for placing an electric rice cooker is fixedly connected to the support plate, four upright posts (2) are fixedly connected to the support plate in a matrix arrangement, the top ends of the four upright posts (2) are commonly fixedly connected to a top plate (3), the upper end of the top plate (3) is fixedly connected to a cylinder (4), and a piston rod of the cylinder (4) passes through the top plate (3) downward and is fixedly connected to a lifting mechanism (5); The lifting mechanism (5) comprises a lifting rod (51) and a connecting ring (54), wherein a rectangular tube (52) is rotatably sleeved on the lifting rod (51), and rectangular rods (53) are slidably sleeved on both left and right ends of the rectangular tube (52), and the ends of the two rectangular rods (53) that are away from each other slide through the same connecting ring (54), and the ends of the rectangular rods (53) that are away from the rectangular tube (52) are fixedly connected with a rectangular connecting block (55), and the lower end surface of the rectangular connecting block (55) is fixedly connected with a No. 1 spring rod (56), and the lower ends of the movable sections of the two No. 1 spring rods (56) are fixedly connected with a semi-ring frame (57), and the two semi-ring frames (57) are spliced ​​to form a ring frame that matches the electric rice cooker; The semi-ring frame (57) is connected with a sealing test mechanism (6) for detecting the sealing of the connection between the cover and the cooker body; the lifting rod (51) is connected with a linkage mechanism (7) for making the two semi-ring frames (57) approach or move away from each other; the lower end of the lifting rod (51) is also connected with an airtightness detection mechanism (8) for testing the sealing of the exhaust valve on the electric cooker; a gas pressure gauge (10) is fixedly arranged on the inner side of the cover of the electric cooker; the lifting rod (51) and the rectangular tube (52) are jointly connected with a driving mechanism (9) for driving the spliced ​​ring frame to rotate intermittently; The linkage mechanism (7) comprises a circular plate (71), the bottom end of the lifting rod (51) is fixedly connected with the circular plate (71), the side wall of the lifting rod (51) is rotatably sleeved with a circular ring (72), the circular ring (72) is located below the rectangular tube (52), the side wall of the lifting rod (51) and the position between the circular ring (72) and the circular plate (71) is cooperatively sleeved with a rectangular connecting seat (73), and the rectangular connecting seat (73) and the lifting rod (51) can slide up and down relative to each other and rotate relative to each other, and the rectangular connecting seat (73) and the rectangular rod (53) are hingedly connected via a hinge plate (74); The driving mechanism (9) comprises an I-shaped frame (91), the upper end of the lifting rod (51) passes through and is fixedly connected to the I-shaped frame (91), the longitudinal section of the I-shaped frame (91) is slidably connected between two corresponding front and rear columns (2), the lower end surface of the I-shaped frame (91) is rotatably connected to a connecting pipe (92), the lower end of the connecting pipe (92) is fixedly connected to the rectangular tube (52), and an intermittent rotating component (93) is connected to the connecting pipe (92); The intermittent rotation assembly (93) includes an interlocking gear (931). The interlocking gear (931) is fixedly sleeved on the connecting pipe (92). A driving motor (932) is fixedly connected to the upper end surface of the I-shaped frame (91). The driving shaft of the driving motor (932) penetrates through the I-shaped frame (91) and is fixedly connected to an incomplete gear (933). The incomplete gear (933) is meshed with the interlocking gear (931).

2. The sealing performance detection device for a rice cooker according to claim 1, characterized in that: The sealing performance testing mechanism (6) includes a semi-circular sealing ring (61). A semi-circular groove is formed in the inner side wall of the semi-circular frame (57). The semi-circular sealing ring (61) is fixedly and fittingly connected in the semi-circular groove. A number of corresponding ventilation holes (62) are evenly formed through the side walls of the semi-circular sealing ring (61) and the semi-circular frame (57). Observation components (63) are connected to the ventilation holes (62).

3. A rice cooker sealing performance detection device according to claim 2, characterized in that: The observation component (63) includes an air pipe (631). The air pipe (631) is fixedly communicated with the ventilation hole (62) on the semi-circular frame (57). A rubber connecting sleeve (632) is fixedly sleeved on the end of the air pipe (631) away from the semi-circular frame (57). A transparent test tube (633) is fixedly connected to one end of the rubber connecting sleeve (632) away from the semi-circular frame (57). Anhydrous copper sulfate powder for detecting water vapor is placed in the transparent test tube (633).

4. The sealing performance detection device for an electric rice cooker according to claim 1, characterized in that: Traction components (75) are symmetrically connected to the front and rear sides of the side wall of the ring (72).

5. The sealing performance detection device for a rice cooker according to claim 4, characterized in that: The traction component (75) includes a folding rod (751). The horizontal section of the folding rod (751) is fixedly connected to the ring (72). The vertical section of the folding rod (751) is slidably penetrated through a U-shaped seat (752). The U-shaped seat (752) has an opening downward, and the lower ends of the vertical sections are rotatably connected to square rods (753). The lower ends of the two square rods (753) are rotatably connected to connecting blocks (754). The two connecting blocks (754) are fixedly connected to the adjacent ends of the two semi-circular frames (57). A closing module (755) is commonly connected inside the two connecting blocks (754). A pressing plate (756) is fixedly connected to the end faces of the movable sections of the two first spring rods (56) close to each other. The bottom end of the vertical section of the folding rod (751) is fixedly connected to a locking sleeve (757). The locking sleeve (757) is in a shape of a Chinese character 'Ri' and is slidably sleeved on the two square rods (753). The two notches on the locking sleeve (757) cooperate with the two vertical sections of the U-shaped seat (752).

6. The sealing performance detection device for an electric rice cooker according to claim 5, characterized in that: The closing module (755) includes an installation groove (7551). An installation groove (7551) is formed on the end face of the connecting block (754) close to the axis of the semi-circular frame (57). A rubber sheet (7552) is fixedly connected in the installation groove (7551) of the left connecting block (754). A plug piece (7553) is fixedly connected in the installation groove (7551) of the right connecting block (754). The plug piece (7553) and the rubber sheet (7552) are misaligned with each other, and the distance between the rubber sheet (7552) and the axis of the semi-circular frame (57) is closer than the distance between the plug piece (7553) and the axis of the semi-circular frame (57).

7. The sealing performance detection device for an electric rice cooker according to claim 3, characterized in that: The air tightness detection mechanism (8) comprises a connecting plate (81), one end of which is fixedly sleeved on the bottom end of the lifting rod (51), and the connecting plate (81) is located between the rectangular connecting seat (73) and the circular plate (71), and the other end of the connecting plate (81) is fixedly connected to a No. 2 spring rod (82), and the bottom end of the movable section of the No. 2 spring rod (82) is fixedly connected to a cylindrical cover (83), an opening is provided below the cylindrical cover (83), and a sealing ring (84) is fixedly connected to the lower opening of the cylindrical cover (83), the side wall of the cylindrical cover (83) is also connected to an observation assembly (63), and anhydrous copper sulfate powder for detecting water vapor is also placed in a transparent test tube (633) on the side wall of the cylindrical cover (83).

8. A method for detecting the sealing performance of an electric rice cooker, characterized in that: The method is completed by using the electric rice cooker sealing performance detection device as claimed in claim 1, comprising the following steps: S1. Preparation: Power on the rice cooker to be tested and add water to its inner pot, start the heating mode and heat the water to boiling; S2, sealing performance test: the lifting mechanism (5) is driven to descend by the piston rod of the cylinder (4), and then the two half-ring frames (57) are driven to approach each other and abut against the connection between the cover and the body of the electric cooker through the linkage mechanism (7), and finally spliced ​​into a half-ring frame (57). At the same time, the lifting rod (51) is driven to descend and the air-tightness detection mechanism (8) is also driven to abut against the periphery of the exhaust valve on the cover of the electric cooker. At this time, the sealing performance of the exhaust valve is tested by the sealing test mechanism (6), and whether there is water vapor leakage at the exhaust valve is tested by the air-tightness detection mechanism (8); S3, test point switching: after a single test is completed, the cylinder (4) drives the lifting rod (51) to rise to reset the two half ring frames (57), and then the driving mechanism (9) drives the rectangular tube (52) to rotate a certain angle, thereby adjusting the position of each sealing test mechanism (6) to prevent the occurrence of a test dead angle, and then continue to test the water vapor leakage at the connection between the rice cooker cover and the rice cooker body through the sealing test mechanism (6). For the transparent test tube (633) where the leakage has been detected, it needs to be replaced with a new transparent test tube (633) filled with anhydrous copper sulfate powder; S4. Result analysis: During the test, the reading of the gas pressure gauge (10) is observed on the one hand, and the reading change of the anhydrous copper sulfate powder in the transparent test tube (633) is observed on the other hand. If the reading of the gas pressure gauge (10) is always above the target value after stabilization and there is no obvious pressure drop, and at the same time, the anhydrous copper sulfate powder in each transparent test tube (633) does not change, it means that the sealing performance of the electric rice cooker is good. If the reading of the gas pressure gauge (10) drops significantly during the test, it means that the sealing of the electric rice cooker is defective. During this process, the changes of the anhydrous copper sulfate powder in the transparent test tube (633) are observed. If the anhydrous copper sulfate powder in a transparent test tube (633) changes from white to blue, it means that there is a leak at the connection between the cover and the body of the electric rice cooker.

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