High-pressure large-diameter electromagnetic flowmeter based on Internet of Things

Abstract

The invention is applicable to the technical field of electromagnetic flowmeters, and provides an internet-of-things-based high-pressure large-diameter electromagnetic flowmeter which comprises a body, a water inlet pipe communicated with the inside of the body is arranged on the right side of the body, a water outlet pipe is arranged on the left side of the body, and a collecting block communicated with the water outlet pipe and the body is arranged between the water outlet pipe and the body. A built-in scraping mechanism used for cleaning the inner cavity of the body is arranged on the water inlet pipe, a collecting mechanism is arranged on the front face of the collecting block and comprises a second motor, the second motor is arranged on the front face of the collecting block, a storage groove is formed in the top wall of the collecting block, and an output shaft of the second motor rotationally penetrates into the storage groove. According to the electromagnetic flowmeter, by arranging the collection mechanism capable of being stored, impurities scraped off from the inner wall of the body can be collected, and the situation that the scraped-off impurities flow into other pipelines along with fluid to affect electromagnetic flowmeters of other pipelines is avoided as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic flowmeters, and more specifically, to a high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things. Background Art

[0002] Electromagnetic flowmeter is an instrument that uses the principle of electromagnetic induction to measure the flow rate of conductive fluid based on the electromotive force induced when the conductive fluid passes through an external magnetic field.

[0003] As retrieved from the existing related patent: CN221173523U, an electromagnetic flowmeter is disclosed. This prior art can clean the inner wall of the measuring pipe during use through the coordinated arrangement of a fixing ring, a connecting rod, a fixed shaft, fan blades, a spiral scraper, and a connecting ring, thereby preventing impurities in the liquid from adhering to the inner wall of the pipe, thereby achieving the purpose of preventing the electromagnetic flowmeter from being blocked.

[0004] However, the inventor believes that the technology has the following problems during use: although the prior art can scrape off impurities on the inner wall of the electromagnetic flowmeter through a spiral scraper, it is impossible to collect these scraped impurities, which will cause these impurities to flow along the pipeline to the electromagnetic flowmeters of other pipelines, thereby affecting the electromagnetic flowmeter detection of other pipelines. At the same time, if the impurities in the pipeline are not discharged in time, it will also affect the purity of the fluid in the pipeline. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things.

[0006] To achieve the above object, the present invention provides the following technical solutions: A high-pressure large-caliber electromagnetic flowmeter based on the Internet of Things comprises a body, a water inlet pipe connected to the interior of the body is arranged on the right side of the body, a water outlet pipe is arranged on the left side of the body, a collecting block connected to the water outlet pipe and the body is arranged between the water inlet pipe, a built-in scraping mechanism for cleaning the inner cavity of the body is arranged on the water inlet pipe, a collecting mechanism is arranged on the front side of the collecting block, the collecting mechanism comprises a second motor, the second motor is arranged on the front side of the collecting block, a receiving groove is arranged on the top wall of the collecting block, the output shaft of the second motor rotates and passes through the receiving groove, a blocking plate is arranged at one end of the output shaft of the second motor located in the receiving groove, the outer surface of the blocking plate on one side away from the second motor is in contact with the inner wall of the collecting block, the blocking plate is provided with collecting grooves extending from the opposite two side surfaces respectively, the collecting groove is a combination shape of two horns in a mirror image, a filter plate is arranged in the collecting groove, a shielding component for shielding the collecting mechanism is arranged on the collecting block, and a scraping mechanism for cleaning the surface of the filter plate is arranged on the right side of the filter plate.

[0007] The present invention is further configured as follows: the shielding assembly includes a third motor, the third motor is arranged on the upper surface of the collecting block, a first transmission shaft is arranged at the lower end of the output shaft of the third motor, a recovery chamber is opened in the collecting block, the lower end of the first transmission shaft rotates and passes through the recovery chamber, a shielding plate is arranged in the recovery chamber, one side of the shielding plate slides and passes through the storage groove, and fits with the inner wall of the storage groove, the lower side of the shielding plate fits with the inner wall of the collecting block, a threaded rod is rotatably connected on the inner wall of the recovery chamber away from the storage groove, a threaded groove is opened on the shielding plate and is threadedly sleeved on the outer surface of the threaded rod, and the outer surface of one end of the threaded rod adjacent to the first transmission shaft is sleeved with two meshing bevel gears.

[0008] The present invention is further configured as follows: the scraping mechanism includes a rotating cover, which is arranged on the right side of the filter plate, and a rotating scraper in contact with the right side surface of the filter plate is arranged on the outer surface of the rotating cover, a rotating shaft is arranged on the left side of the filter plate, the right end of the rotating shaft rotates and passes through the filter plate and is connected to the right inner wall of the rotating cover, a first worm gear is arranged on the left end of the rotating shaft, the outer surface of the first worm gear is meshedly connected with the first worm, a second transmission shaft is arranged on the upper side of the first worm, a transmission cavity is opened on the upper side of the blocking plate, the upper end of the second transmission shaft rotates and passes through the transmission cavity, the upper end of the second transmission shaft is sleeved with a second worm gear, the outer surface of the second worm gear is meshedly connected with the second worm that is rotatably connected to the inner wall of the transmission cavity, a fixing rod that is in the same horizontal position as the second motor output shaft is arranged on the rear inner wall of the storage groove, the front end of the fixing rod rotates and passes through the transmission cavity, a face gear is sleeved on the outer surface of the fixing rod located in the transmission cavity, and a self-rotating gear meshedly connected to the face gear is sleeved on the outer surface of one end of the second worm gear close to the face gear.

[0009] The present invention is further configured as follows: a retractable baffle mechanism is provided on the right side of the filter plate, a pushing mechanism is provided on the side of the rotating scraper close to the retractable baffle mechanism, an impurity collecting groove is provided on the right side surface of the baffle plate, a connecting groove connected to the collecting groove is provided on the inner wall of the impurity collecting groove, and the connecting groove is located between the retractable baffle mechanism and the rotating scraper.

[0010] The present invention is further configured as follows: the pushing mechanism includes a movable scraper, which is arranged on the side of the rotating scraper close to the retracting baffle mechanism, the left side of the movable scraper contacts the surface of the filter plate and slides, a T-shaped groove is opened on the outer surface of the rotating scraper, a connecting plate is arranged on the side of the movable scraper close to the T-shaped groove, the other side of the connecting plate extends into the vertical groove of the T-shaped groove, and a weight-increasing block sliding in the T-shaped groove is arranged on one side of the connecting plate located in the vertical groove of the T-shaped groove.

[0011] The present invention is further configured as follows: a docking block is provided on the side of the weight-increasing block close to the rotating cover, a docking groove adapted to the docking block is provided on the inner wall of the T-shaped slide groove close to the docking block, when the weight-increasing block is located on the side close to the rotating cover, the docking block extends into the docking groove, a pushing cavity is provided in the rotating scraper, a locking rod with one end sliding through the docking groove is provided in the pushing cavity, a locking groove adapted to the locking rod is provided on the side of the docking block facing the locking rod, a pulling plate is provided on one end of the locking rod located in the pushing cavity, and a tension spring movably sleeved on the outer surface of the locking rod is provided between the pulling plate and the inner wall of the pushing cavity.

[0012] The present invention is further configured as follows: a trigger rod is arranged in the rotating cover, one end of the trigger rod slides through the push cavity, a trigger rotating plate is hinged between the end of the trigger rod located in the push cavity and the pulling plate, an inclined plate extending into the rotating cover is arranged on the right side surface of the filter plate, and the end of the trigger rod located in the rotating cover contacts with the inclined surface of the inclined plate.

[0013] The present invention is further configured as follows: the retracting baffle mechanism includes a limiting collecting plate, which is arranged on the right side of the filter plate and slides on the right side of the filter plate, a reset cavity is opened in the blocking plate, the upper side of the limiting collecting plate slides into the reset cavity, and a built-in plate sliding in the reset cavity is arranged on one side of the limiting collecting plate located in the reset cavity, and a second spring is arranged between the built-in plate and the inner wall of the reset cavity.

[0014] The present invention is further configured as follows: an extraction mechanism for extracting impurities in the impurity collecting tank is provided on the upper side of the collecting block, the extraction mechanism includes an extraction tube, the extraction tube is provided on the upper side of the collecting block, the lower end of the extraction tube slides through the receiving tank, an auger is provided in the extraction tube, the outer surface of the auger is in contact with the inner wall of the extraction tube, the lower end of the auger extends out of the extraction tube and finally extends into the impurity collecting tank, the upper end of the auger extends out of the upper side of the extraction tube, a top plate is provided on the upper side of the extraction tube, the outer surface of the extraction tube located on the upper side of the collecting block is sleeved with a discharge platform, a support rod for fixing is provided between the lower surface of the top plate and the outer surface of the discharge platform, a fourth motor is provided on the top plate, and the lower end of the output shaft of the fourth motor rotates through the lower surface of the top plate and is connected to the upper end of the auger.

[0015] The present invention is further configured as follows: a built-in cavity wrapped around the outside of the extraction tube is opened in the collecting block, the extraction tube is located on the outer surface of the built-in cavity and is sleeved with a sleeve ring, a third spring movably sleeved on the outer surface of the extraction tube is arranged between the lower surface of the sleeve ring and the bottom wall of the built-in cavity, a movable cavity is opened on the right inner wall of the built-in cavity, a sleeve shaft is rotatably connected between the front and rear inner walls of the movable cavity, a rotating push plate is sleeved on the outer surface of the sleeve shaft, the left side of the rotating push plate extends into the built-in cavity and contacts with the upper surface of the sleeve ring, the sleeve shaft is located on the side of the rotating push plate away from the built-in cavity, a pushing rod with a lower end sliding through the receiving groove is arranged in the movable cavity, the lower end of the pushing rod contacts the blocking plate, a movable groove is opened on the right side of the rotating push plate, a movable rod is arranged on the outer surface of the push rod close to the movable groove, one end of the movable rod extends into the movable groove and slides in the movable groove.

[0016] The advantages of the present invention are: First, the present invention is equipped with a retractable collecting mechanism, so that impurities scraped off the inner wall of the body can be collected, and the impurities scraped off are avoided as much as possible from flowing into other pipelines with the fluid and affecting the electromagnetic flowmeters in other pipelines, thereby further ensuring the cleaning effect of the inner wall of the electromagnetic flowmeter. After cleaning, the collecting mechanism can be stored, thereby avoiding the collection mechanism from affecting the fluid flow during normal use, and ensuring the detection accuracy of the electromagnetic flowmeter.

[0017] Secondly, the present invention provides a pushing mechanism. When the baffle plate is completely stored in the storage groove and the right side is tilted upward, the impurities scraped by the rotating scraper are gathered between the retracted baffle mechanism and the rotating scraper. Since the right side of the baffle plate is tilted upward, the pushing mechanism can push the impurities between the retracted baffle mechanism and the rotating scraper to the connecting groove under the action of inertia. These impurities eventually fall into the impurity collecting groove through the connecting groove, thereby achieving the purpose of impurity collection.

[0018] Thirdly, the present invention provides a locking rod and other structures, which can automatically fix or unlock the movable scraper after the rotating scraper and the blocking plate rotate to the specified position, without the need for manual operation, has high stability, and improves the use effect of the mechanism.

[0019] Fourthly, the present invention provides an extraction mechanism, so that the impurities falling into the impurity collecting tank can be continuously transported upward under the rotation of the auger. When the impurities are transported out of the upper side of the extraction tube by the auger, they will be thrown out to the discharge platform by the auger and slide along the inclined surface of the discharge platform. The above structure can continuously extract the collected impurities from the outside of the collection block, avoiding as much as possible the accumulation of excessive impurities in the collection block, which affects the later collection effect of the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a structural schematic diagram of a high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things of the present invention; Figure 2 is a cross-sectional schematic diagram of a water inlet pipe of the present invention; Figure 3 It is a front plan view of the internal structure of the collecting block of the present invention; Figure 4 It is a structural schematic diagram of the blocking plate of the present invention; Figure 5 It is a side plan view of the collecting block in the present invention; Figure 6 It is a front plan view of the internal structure of the baffle plate of the present invention; Figure 7 for Figure 5 Enlarged view of point A in the middle; Figure 8 for Figure 7 Enlarged view of point B in the middle; Fig. 9 for Figure 3 Enlarged view of center C.

[0021] In the figure: 1. Main body; 2. Water inlet pipe; 3. Built-in scraping mechanism; 31. First motor; 32. First gear; 33. Gear ring; 34. Fixed rod; 35. Annular groove; 36. Limiting groove; 37. Limiting ring; 38. Built-in scraper; 39. Movable plate; 310. Contraction chamber; 311. T-axis; 312. Alignment groove; 313. First spring; 4. Water outlet pipe; 5. Collection block; 6. Collection mechanism; 61. Second motor; 62. Storage tank; 63. Blocking plate; 64. Collection tank; 65. Filter plate; 7. Shielding assembly; 71. Third motor; 72. Recovery chamber; 73. First transmission shaft; 74. Threaded rod; 75. Bevel gear; 76. Shielding plate; 8. Scraping mechanism; 81. Rotating cover; 82. Rotating scraper; 83. Pushing mechanism; 84. Retracting baffle mechanism; 85. Impurity collecting groove; 86. Connecting groove; 87. Rotating shaft; 88. First worm gear; 89. Transmission chamber; 810. Fixed rod; 811. Face gear; 812. Self-rotating gear; 813. Second worm; 814. Second worm; 815. Second transmission shaft; 816. First worm; 831, movable scraper; 832, T-shaped slide; 833, connecting plate; 834, weight-increasing block; 835, docking block; 836, docking groove; 837, pushing chamber; 838, locking rod; 839, pulling plate; 8310, tension spring; 8311, trigger rod; 8312, trigger rotating plate; 8313, tilting plate; 841, limit collecting plate; 842, reset chamber; 843, built-in plate; 844, second spring; 9. Extraction mechanism; 91. Extraction tube; 92. Auger; 93. Discharging platform; 94. Top plate; 95. Fourth motor; 96. Built-in cavity; 97. Sleeve ring; 98. Third spring; 99. Movable cavity; 910. Sleeve shaft; 911. Rotating push plate; 912. Push rod; 913. Movable groove; 914. Movable rod. DETAILED DESCRIPTION

[0022] See also Figure 1-9 , the present invention provides the following technical solutions: Specifically, it refers to a high-pressure, large-caliber electromagnetic flowmeter based on the Internet of Things, including a main body 1, a water inlet pipe 2 connected to the interior of the main body 1 is arranged on the right side of the main body 1, a water outlet pipe 4 is arranged on the left side of the main body 1, and a collecting block 5 connected to the water outlet pipe 4 and the main body 1 is arranged between the water outlet pipe 4 and the main body 1. When the electromagnetic flowmeter is in use, the fluid enters the main body 1 through the water inlet pipe 2 for flow detection, and is finally transported out through the collecting block 5 and the water outlet pipe 4.

[0023] The water inlet pipe 2 is provided with a built-in scraping mechanism 3 for cleaning the inner cavity of the body 1. The built-in scraping mechanism 3 includes a first motor 31, which is arranged on the outer surface of the water inlet pipe 2. A first gear 32 is arranged on the left end of the output shaft of the first motor 31. An annular groove 35 communicating with the inside of the water inlet pipe 2 is provided on the outer surface of the water inlet pipe 2. A gear ring 33 meshing with the first gear 32 is slidably connected in the annular groove 35. The inner side surface of the gear ring 33 is flush with the inner wall of the water inlet pipe 2. Annular limiting grooves 36 are provided on the inner walls on both sides of the annular groove 35. The surface of the gear ring 33 close to the limiting groove 36 A limiting ring 37 sliding in the limiting groove 36 is provided on it, a fixing rod 34 is provided between the flange of the water inlet pipe 2 and the outer surface of the main body 1 to prevent the water inlet pipe 2 from falling off, and a built-in scraper 38 extending into the main body 1 on the left side and contacting the inner wall of the main body 1 is provided on the inner side surface of the gear ring 33. Therefore, when in use, the first motor 31 is started, and the output shaft of the first motor 31 drives the first gear 32 to rotate, thereby driving the gear ring 33 to rotate in the annular groove 35, so that the built-in scraper 38 can scrape off impurities attached to the inner wall of the main body 1, thereby ensuring the measurement accuracy of the electromagnetic flowmeter when used for a long time.

[0024] At the same time, in the present invention, a sealing rubber ring is provided on the outer surface of the gear ring 33, which increases the sealing between the gear ring 33 and the annular groove 35 and avoids leakage when the electromagnetic flowmeter is used.

[0025] A movable plate 39 is provided on one side of the built-in scraper 38 close to the gear ring 33, a contraction cavity 310 is provided in the gear ring 33, a T-shaped shaft 311 is slidably connected in the contraction cavity 310, one end of the vertical rod of the T-shaped shaft 311 slides through the inner side of the gear ring 33 and is connected to the movable plate 39, a first spring 313 movably sleeved on the outer surface of the vertical rod is provided between the cross plate of the T-shaped shaft 311 and the inner wall of the contraction cavity 310, an alignment groove 312 for accommodating the built-in scraper 38 is provided on the inner wall of the water inlet pipe 2 and the inner wall of the body 1, and the inner side of the gear ring 33 A groove adapted to the movable plate 39 is provided, and the groove is connected to the alignment groove 312. When the first spring 313 is not squeezed, the first spring 313 will form a thrust on the cross plate of the T-shaped shaft 311, so that the T-shaped shaft 311 pulls the movable plate 39 to shrink into the groove, and the built-in scraper 38 shrinks into the alignment groove 312, and the outer surfaces of the built-in scraper 38 and the movable plate 39 are flush with the inner wall of the body 1, so that when the fluid is transported, it will not affect the flow of the liquid, thereby ensuring the accuracy of the electromagnetic flowmeter in measuring the fluid flow.

[0026] A collecting mechanism 6 is provided on the front of the collecting block 5. The collecting mechanism 6 includes a second motor 61. The second motor 61 is provided on the front of the collecting block 5. A receiving groove 62 is provided on the top wall of the collecting block 5. The output shaft of the second motor 61 rotates and passes through the receiving groove 62. A blocking plate 63 is provided at one end of the output shaft of the second motor 61 located in the receiving groove 62. The outer surface of the blocking plate 63 on the side away from the second motor 61 is in contact with the inner wall of the collecting block 5. The blocking plate 63 is provided with collecting grooves 64 extending from the opposite side surfaces thereof. The collecting groove 64 is a combination shape of two horns in a mirror image. A filter plate 65 is provided in the collecting groove 64. When in use, the blocking plate 63 is driven to rotate downward by the output shaft of the second motor 61, so that the outer surface of the lower side of the blocking plate 63 is in contact with the inner wall of the collecting block 5. At the same time, the filter plate 65 rotates with the blocking plate 63. 63 rotates to the collecting block 5, so when the impurities on the inner wall of the main body 1 are scraped, the scraped impurities flow into the collecting block 5 with the fluid, and the filter plate 65 filters the impurities in the fluid, and the filtered fluid is discharged through the outlet pipe 4. At this time, the impurities are attached to the right side surface of the filter plate 65, thereby achieving the purpose of collecting impurities, and avoiding as much as possible that these scraped impurities flow into other pipelines with the fluid to affect the electromagnetic flowmeter of other pipelines, further ensuring the cleaning effect of the inner wall of the electromagnetic flowmeter, when the impurities are cleaned, the built-in scraping mechanism 3 is reset, and the electromagnetic flowmeter stops conveying fluid. At this time, the second motor 61 controls the blocking plate 63 to rotate into the storage groove 62 again, thus avoiding the filter plate 65 from affecting the fluid flow during normal use, and ensuring the detection accuracy of the electromagnetic flowmeter.

[0027] The collecting block 5 is provided with a shielding assembly 7 for shielding the collecting mechanism 6. The shielding assembly 7 includes a third motor 71, which is arranged on the upper surface of the collecting block 5. The lower end of the output shaft of the third motor 71 is provided with a first transmission shaft 73. A recovery chamber 72 is provided in the collecting block 5. The lower end of the first transmission shaft 73 rotates and penetrates into the recovery chamber 72. A shielding plate 76 is provided in the recovery chamber 72. One side of the shielding plate 76 slides and penetrates into the receiving groove 62 and fits with the inner wall of the receiving groove 62 to shield the collecting mechanism 6. The lower side of the plate 76 is in contact with the inner wall of the collecting block 5, and a threaded rod 74 is rotatably connected to the inner wall of the recovery chamber 72 away from the receiving groove 62. A threaded groove is provided on the shielding plate 76 and is threadedly sleeved on the outer surface of the threaded rod 74. The outer surface of the end of the threaded rod 74 adjacent to the first transmission shaft 73 is sleeved with two meshing bevel gears 75. When the blocking plate 63 rotates into the receiving groove 62, the third motor 71 is started and drives the first transmission shaft 73 to rotate. The threaded rod 74 meshes with the two bevel gears 75. The shielding plate 76 is driven by the threaded rod 74 to gradually move into the receiving groove 62 and shield the bottom of the receiving groove 62, thereby preventing the fluid flowing in the collecting block 5 from flowing into the receiving groove 62. When the blocking plate 63 needs to be rotated into the collecting block 5, the third motor 71 controls the first transmission shaft 73 to rotate in the opposite direction, so that the shielding plate 76 gradually moves into the recovery chamber 72 and cannot block the receiving groove 62. At this time, the blocking plate 63 can be rotated downward. After the bottom of the baffle plate 63 is in contact with the inner wall of the collecting block 5, the shielding plate 76 is controlled to move into the receiving groove 62 again until it contacts the baffle plate 63. In this way, when the impurities are collected, the fluid and impurities in the collecting block 5 can be prevented from flowing into the receiving groove 62. At the same time, when the bottom of the baffle plate 63 is in contact with the inner wall of the collecting block 5, the left side of the baffle plate 63 is in contact with the left inner wall of the receiving groove 62, so that the fluid cannot enter the receiving groove 62 through the gap between the baffle plate 63 and the receiving groove 62.

[0028] In the present invention, the outer surfaces of the shielding plate 76 and the blocking plate 63 are both provided with sealing rubber pads, which increases the sealing performance of the shielding plate 76 when shielding the bottom of the storage groove 62 .

[0029] A scraping mechanism 8 for cleaning the surface of the filter plate 65 is provided on the right side of the filter plate 65. The scraping mechanism 8 includes a rotating cover 81, which is provided on the right side of the filter plate 65. A rotating scraper 82 in contact with the right side surface of the filter plate 65 is provided on the outer surface of the rotating cover 81. A rotating shaft 87 is provided on the left side of the filter plate 65. The right end of the rotating shaft 87 rotates through the filter plate 65 and is connected to the right inner wall of the rotating cover 81. A first worm gear 88 is provided on the left end of the rotating shaft 87. The outer surface of the first worm gear 88 is meshed with a first worm 816. A second transmission shaft 815 is disposed on the upper side of the first worm 816, a transmission cavity 89 is opened on the upper side of the blocking plate 63, the upper end of the second transmission shaft 815 rotates and penetrates into the transmission cavity 89, a second worm wheel 814 is sleeved on the upper end of the second transmission shaft 815, and the outer surface of the second worm wheel 814 is meshedly connected with a second worm 813 that is rotatably connected to the inner wall of the transmission cavity 89, and a fixing rod 810 that is at the same horizontal position as the output shaft of the second motor 61 is disposed on the inner wall of the rear side of the storage groove 62, and the front end of the fixing rod 810 rotates and penetrates into the transmission cavity 89. 9, a face gear 811 is sleeved on the outer surface of the fixed rod 810 located in the transmission cavity 89, and a self-rotating gear 812 meshing with the face gear 811 is sleeved on the outer surface of one end of the second worm 813 close to the face gear 811. When the blocking plate 63 rotates downward or upward, the fixed rod 810 remains stationary, so that the self-rotating gear 812 moves in a circumferential direction along the surface of the face gear 811. During the displacement, the self-rotating gear 812 is affected by the face gear 811 and rotates itself, thereby achieving the control of the second worm 813 and the face gear 811. The purpose of the second worm gear 814 rotating is that the second transmission shaft 815 synchronously drives the first worm 816 to rotate, so that the first worm 816 engages and transmits the rotating shaft 87, thereby controlling the rotating scraper 82 to rotate clockwise or counterclockwise on the right side surface of the filter plate 65, so that the impurities attached to the surface of the filter plate 65 can be scraped off. At the same time, since the impurities are separated from the fluid, the impurities have a certain viscosity, so when the rotating scraper 82 scrapes off the impurities again, these impurities will adhere to between the rotating scraper 82 and the filter plate 65.

[0030] A retractable baffle mechanism 84 is provided on the right side of the filter plate 65, and a pushing mechanism 83 is provided on the side of the rotating scraper 82 close to the retractable baffle mechanism 84. An impurity collecting groove 85 is provided on the right surface of the blocking plate 63, and a connecting groove 86 connected to the collecting groove 64 is provided on the inner wall of the impurity collecting groove 85. The connecting groove 86 is located between the retractable baffle mechanism 84 and the rotating scraper 82. When the blocking plate 63 rotates upward and is stored in the storage groove 62, the rotating scraper 82 rotates counterclockwise. When the baffle 63 is completely stored in the storage groove 62 and the right side is tilted upward, the impurities scraped by the rotating scraper 82 are gathered between the retracting baffle mechanism 84 and the rotating scraper 82. Since the right side of the baffle 63 is tilted upward, the pushing mechanism 83 can push the impurities between the retracting baffle mechanism 84 and the rotating scraper 82 to the connecting groove 86 under the action of inertia. These impurities eventually fall into the impurity collecting groove 85 through the connecting groove 86, thereby completing the purpose of impurity collection.

[0031] The pushing mechanism 83 includes a movable scraper 831, which is arranged on the side of the rotating scraper 82 close to the retracting baffle mechanism 84. The left side of the movable scraper 831 contacts the surface of the filter plate 65 and slides. A T-shaped groove 832 is provided on the outer surface of the rotating scraper 82. A connecting plate 833 is provided on the side of the movable scraper 831 close to the T-shaped groove 832. The other side of the connecting plate 833 extends into the vertical groove of the T-shaped groove 832. A weight block 834 sliding in the T-shaped groove 832 is provided on one side of the connecting plate 833 located in the vertical groove of the T-shaped groove 832. Therefore, when the blocking plate 84 is blocked, the filter plate 65 is moved. The plate 63 is stored in the storage groove 62, and the right side is upwardly tilted. The weight block 834 drives the movable scraper 831 to slide to the side close to the connecting groove 86 under the action of inertia, so that the impurities between the retracting baffle mechanism 84 and the rotating scraper 82 can be scraped into the connecting groove 86. In this way, the impurities scraped by the rotating scraper 82 can be collected, and the impurities on the right side of the filter plate 65 that are not processed for a long time are avoided as much as possible, which affects the use effect of the filter plate 65. At the same time, the above structure does not require manual cleaning of the surface of the filter plate 65, reducing the workload.

[0032] In order to avoid the problem of the movable scraper 831 being displaced back and forth during the rotation of the rotating scraper 82, the following structure is set up: a docking block 835 is set on the side of the weight-added block 834 close to the rotating cover 81, and a docking groove 836 adapted to the docking block 835 is opened on the inner wall of the T-shaped slide 832 close to the docking block 835. When the weight-added block 834 is on the side close to the rotating cover 81, the docking block 835 extends into the docking groove 836, and a pushing cavity 837 is opened in the rotating scraper 82. A locking rod 838 with one end slidingly inserted into the docking groove 836 is set in the pushing cavity 837, and the docking block 835 is moved toward the locking rod 838. A locking groove adapted to the locking rod 838 is provided on one side of 38, and a pulling plate 839 is provided at one end of the locking rod 838 located in the pushing chamber 837, and a tension spring 8310 movably sleeved on the outer surface of the locking rod 838 is provided between the pulling plate 839 and the inner wall of the pushing chamber 837. When the tension spring 8310 is not squeezed, the tension spring 8310 will form a pulling force on the pulling plate 839, so that one end of the locking rod 838 extends into the locking groove, thereby completing the fixation of the docking block 835, thereby avoiding the problem of self-movement of the movable scraper 831 during the rotation of the rotating scraper 82 as much as possible, thereby ensuring the collection effect of impurities.

[0033] A trigger rod 8311 is provided in the rotating cover 81, and one end of the trigger rod 8311 slides through the pushing cavity 837. A trigger rotating plate 8312 is hinged between the end of the trigger rod 8311 located in the pushing cavity 837 and the pulling plate 839. The right side surface of the filter plate 65 is provided with an inclined plate 8313 extending into the rotating cover 81. The end of the trigger rod 8311 located in the rotating cover 81 contacts the inclined surface of the inclined plate 8313. When the lower side of the blocking plate 63 blocks the inside of the collecting block 5, the rotating scraper 82 rotates clockwise, so that the trigger rod 8311 is located in front of the inclined plate 8313 and there is no contact between the two. When the blocking plate 63 rotates upward, the rotating scraper 82 rotates counterclockwise and scrapes off the impurities attached to the filter plate 65. When the rotating scraper 82 rotates to the side close to the retracting baffle mechanism 84, the end of the trigger rod 8311 located in the rotating cover 81 contacts the inclined surface of the inclined plate 8313, so that the trigger rod 8311 moves toward one side of the pushing cavity 837. At this time, the trigger rotating plate 8312 will form a thrust on the pulling plate 839, so that the pulling plate 839 pulls the locking rod 838 to gradually move into the locking groove. When the blocking plate 63 rotates to the specified position and the rotating scraper 82 and the retracting baffle mechanism 84 is parallel, the locking rod 838 is completely displaced out of the locking groove. At this time, the locking rod 838 cannot form a restricting effect on the docking block 835, so the weight block 834 slides downward under the action of inertia. When the blocking plate 63 rotates downward, the rotating scraper 82 rotates clockwise. At this time, the trigger rod 8311 gradually moves out of the inclined plate 8313. Therefore, the locking rod 838 is pulled to the initial position by the tension spring 8310. When the rotating scraper 82 rotates to tilt upward, the weight block 834 is displaced to the side close to the rotating cover 81 under the action of inertia, so that the docking block 835 is displaced into the docking groove 836 again. At this time, the inclined surface of the docking block 835 will squeeze the locking rod 838, causing the locking rod 838 to move into the pushing cavity 837, and the tension spring 8310 will be stretched. When the docking block 835 is completely moved into the docking groove 836, the locking rod 838 and the locking groove are in the same position. The locking rod 838 is pulled by the tension spring 8310 to fix the position of the movable scraper 831 again. The above structure can automatically fix or unlock the movable scraper 831 after the rotating scraper 82 and the blocking plate 63 rotate to the specified position. No manual operation is required, which has high stability and improves the use effect of the mechanism.

[0034] The retracting baffle mechanism 84 includes a limiting collecting plate 841, which is arranged on the right side of the filter plate 65 and slides on the right side of the filter plate 65. A reset cavity 842 is opened in the blocking plate 63. The upper side of the limiting collecting plate 841 slides through the reset cavity 842. A built-in plate 843 that slides in the reset cavity 842 is arranged on one side of the limiting collecting plate 841 located in the reset cavity 842. A second spring 844 is arranged between the built-in plate 843 and the inner wall of the reset cavity 842. When the second spring 844 is not squeezed, a thrust is formed on the built-in plate 843, so that the limiting collecting plate 841 The lower side extends into the collecting groove 64 and contacts the right side of the filter plate 65. When the rotating scraper 82 rotates clockwise, the rotating scraper 82 will form a thrust on the lower side of the limiting collecting plate 841, so that the limiting collecting plate 841 gradually moves into the reset chamber 842. At the same time, the second spring 844 is stressed and contracts, so that the limiting collecting plate 841 will not hinder the rotation of the rotating scraper 82. When the rotating scraper 82 rotates counterclockwise, the rotating scraper 82 no longer contacts the limiting collecting plate 841, so the limiting collecting plate 841 moves to the initial position under the push of the second spring 844.

[0035] An extraction mechanism 9 for extracting impurities in the impurity collection tank 85 is provided on the upper side of the collection block 5. The extraction mechanism 9 includes an extraction tube 91. The extraction tube 91 is provided on the upper side of the collection block 5. The lower end of the extraction tube 91 slides through the storage tank 62. An auger 92 is provided in the extraction tube 91. The outer surface of the auger 92 is in contact with the inner wall of the extraction tube 91. The lower end of the auger 92 extends out of the extraction tube 91 and finally extends into the impurity collection tank 85. The upper end of the auger 92 extends out of the upper side of the extraction tube 91. A top plate 94 is provided on the upper side of the extraction tube 91. The outer surface of the extraction tube 91 located on the upper side of the collection block 5 is sleeved with a discharge platform 93. A support rod for fixing is provided between the lower surface of the top plate 94 and the outer surface of the discharge platform 93. A fourth motor 95 is provided, and the lower end of the output shaft of the fourth motor 95 rotates to penetrate the lower surface of the top plate 94 and is connected to the upper end of the auger 92. When the lower end of the auger 92 extends into the impurity collecting tank 85, the fourth motor 95 is started so that the fourth motor 95 can continuously drive the auger 92 to rotate. Therefore, impurities falling into the impurity collecting tank 85 can be continuously transported upward under the rotation of the auger 92. When the impurities are transported out of the upper side of the extraction tube 91 by the auger 92, they will be thrown out by the auger 92 to the discharge platform 93 and slide down along the inclined surface of the discharge platform 93. The above structure can continuously extract the collected impurities from the outside of the collection block 5, and avoid as much as possible the accumulation of excessive impurities in the collection block 5, which affects the later collection effect of impurities.

[0036] An internal cavity 96 wrapped around the outside of the extraction tube 91 is provided in the collection block 5. The extraction tube 91 is located on the outer surface of the internal cavity 96 and is sleeved with a sleeve ring 97. A third spring 98 movably sleeved on the outer surface of the extraction tube 91 is provided between the lower surface of the sleeve ring 97 and the bottom wall of the internal cavity 96. When the third spring 98 is not squeezed, the third spring 98 will form a supporting effect on the sleeve ring 97, so that the extraction tube 91 moves upward as a whole, thereby causing the lower end of the auger 92 to move out of the impurity collection groove 85. In this way, when the blocking plate 63 is rotating, the bottom of the auger 92 will not contact the inner wall of the impurity collection groove 85, thereby minimizing the problem of the blocking plate 63 getting stuck during rotation.

[0037] A movable cavity 99 is provided on the right inner wall of the built-in cavity 96, and a sleeve shaft 910 is rotatably connected between the inner walls on the front and rear sides of the movable cavity 99. A rotating push plate 911 is sleeved on the outer surface of the sleeve shaft 910. The left side of the rotating push plate 911 extends into the built-in cavity 96 and contacts the upper surface of the sleeve ring 97. The sleeve shaft 910 is located on the side of the rotating push plate 911 away from the built-in cavity 96. A push rod 912 is provided in the movable cavity 99, and the lower end of the push rod 912 slides through the storage groove 62. The lower end of the push rod 912 contacts the blocking plate 63. A movable groove 913 is provided on the right side of the rotating push plate 911. A movable rod 914 is provided on the outer surface of the push rod 912 close to the movable groove 913. One end of the movable rod 914 extends into the movable groove 913 and slides in the movable groove 913. Therefore, when the blocking plate 63 rotates upward into the storage groove 62, the blocking plate 63 contacts the lower end of the movable rod 914 and forms an upward push on the movable rod 914 The force is generated by the push rod 912, so the push rod 912 pushes the rotating push plate 911 to rotate counterclockwise, so that the left side of the rotating push plate 911 will form a thrust on the sleeve ring 97, so that the sleeve ring 97 pushes the extraction tube 91 to move downward, and at the same time, the third spring 98 is stressed and contracts, so that the lower end of the auger 92 extends into the impurity collection groove 85. When the blocking plate 63 rotates downward, the blocking plate 63 no longer restricts the push rod 912, so that the third spring 98 pushes the extraction tube 91 to move to the initial position, and because the sleeve shaft 910 is located on the side of the rotating push plate 911 away from the built-in cavity 96, the left side force arm of the rotating push plate 911 is longer, so the push rod 912 only needs to push the right side of the rotating push plate 911 to move upward a shorter distance to push the extraction tube 91 to move downward a longer distance, so that the auger 92 can be quickly controlled to move in or out of the impurity collection groove 85, and the contact between the auger 92 and the inner wall of the impurity collection groove 85 is avoided as much as possible.

[0038] The working principle of the high-pressure large-caliber electromagnetic flowmeter based on the Internet of Things provided by the present invention is as follows: the first step is to control the baffle plate 76 to move into the recovery chamber 72 before cleaning the impurities on the inner wall of the body 1. At this time, the output shaft of the second motor 61 drives the baffle plate 63 to rotate downward, so that the lower outer surface of the baffle plate 63 fits the inner wall of the collection block 5, and the filter plate 65 rotates into the collection block 5 with the baffle plate 63, and then controls the baffle plate 76 to move into the storage groove 62 until it contacts the baffle plate 63. Therefore, when the impurities on the inner wall of the body 1 are scraped off, the scraped impurities flow into the collection block 5 with the fluid, and the filter plate 65 filters the impurities in the fluid, and the filtered fluid is discharged through the outlet pipe 4. At this time, the impurities are attached to the right side surface of the filter plate 65; Step 2: After the impurities on the inner wall of the body 1 are cleaned, the fluid delivery is stopped, the shielding plate 76 is controlled to move into the recovery chamber 72, and the blocking plate 63 is controlled to rotate upward into the storage groove 62. During the upward rotation of the blocking plate 63, the fixing rod 810 remains stationary, so that the self-rotating gear 812 moves in a circumferential direction along the surface of the face gear 811. During the displacement, the self-rotating gear 812 is affected by the face gear 811 and rotates by itself, so as to control the rotating scraper 82 to rotate counterclockwise on the right side surface of the filter plate 65, so that the impurities on the right side surface of the filter plate 65 can be scraped off. Since the impurities are separated from the fluid, the impurities have a certain viscosity, so when the rotating scraper 82 scrapes off the impurities, these impurities will adhere to the rotating scraper 82 and the filter plate 65. The third step is that when the blocking plate 63 rotates to the specified position and the rotating scraper 82 is parallel to the retracting baffle mechanism 84, the locking rod 838 is completely moved out of the locking groove. At this time, the locking rod 838 cannot form a restricting effect on the docking block 835, so the weight block 834 slides downward under the action of inertia. When the blocking plate 63 rotates downward, the rotating scraper 82 rotates clockwise. At this time, the trigger rod 8311 gradually moves out of the inclined plate 8313. Therefore, the locking rod 838 is pulled to the initial position by the tension spring 8310. The weight block 834 drives the movable scraper 831 to slide to the side close to the connecting groove 86 under the action of inertia, so that the impurities between the retracting baffle mechanism 84 and the rotating scraper 82 can be scraped into the connecting groove 86 and fall into the impurity collecting groove 85. Step 4. While the blocking plate 63 is tilting upward, the blocking plate 63 contacts the lower end of the movable rod 914 and forms an upward thrust on the movable rod 914. Therefore, the pushing rod 912 pushes the rotating push plate 911 to rotate counterclockwise, so that the left side of the rotating push plate 911 will form a thrust on the sleeve ring 97, so that the sleeve ring 97 pushes the extraction tube 91 to move downward, so that the auger 92 moves into the impurity collection tank 85. At this time, only the fourth motor 95 is needed to control the rotation of the auger 92, so that the impurities in the impurity collection tank 85 can be continuously transported upward out of the collection block 5.

Claims

1. A high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things, comprising a body (1), characterized in that: The right side of the body (1) is provided with a water inlet pipe (2) connected to the interior thereof, the left side of the body (1) is provided with a water outlet pipe (4), a collecting block (5) connected to the water outlet pipe (4) and the body (1) is provided between the water outlet pipe (4) and the body (1), and a built-in scraping mechanism (3) for cleaning the inner cavity of the body (1) is provided on the water inlet pipe (2); A collecting mechanism (6) is arranged on the front of the collecting block (5). The collecting mechanism (6) comprises a second motor (61). The second motor (61) is arranged on the front of the collecting block (5). A receiving groove (62) is provided on the top wall of the collecting block (5). The output shaft of the second motor (61) rotates and penetrates into the receiving groove (62). A blocking plate (63) is provided at one end of the output shaft of the second motor (61) located in the receiving groove (62). The outer surface of the blocking plate (63) on a side away from the second motor (61) is in contact with the inner wall of the collecting block (5). The blocking plate (63) is provided with collecting grooves (64) extending from two opposite side surfaces thereof. The collecting groove (64) is in the shape of a combination of two horns in a mirror image. A filter plate (65) is provided in the collecting groove (64). A shielding component (7) for shielding the collecting mechanism (6) is provided on the collecting block (5). A scraping mechanism (8) for cleaning the surface of the filter plate (65) is provided on the right side of the filter plate (65).

2. According to the Internet of Things-based high-pressure and large-caliber electromagnetic flowmeter according to claim 1, it is characterized in that: The shielding assembly (7) comprises a third motor (71), the third motor (71) being arranged on the upper surface of the collecting block (5), a first transmission shaft (73) being arranged at the lower end of the output shaft of the third motor (71), a recovery chamber (72) being provided in the collecting block (5), the lower end of the first transmission shaft (73) being rotatably inserted into the recovery chamber (72), a shielding plate (76) being arranged in the recovery chamber (72), one side of the shielding plate (76) being slidably inserted into the receiving groove (62) and being fitted with the inner wall of the receiving groove (62), the lower side of the shielding plate (76) being fitted with the inner wall of the collecting block (5), a threaded rod (74) being rotatably connected to the inner wall of the recovery chamber (72) away from the receiving groove (62), a threaded groove being provided on the shielding plate (76) being threadedly sleeved on the outer surface of the threaded rod (74), and two meshing bevel gears (75) being sleeved on the outer surface of one end of the threaded rod (74) adjacent to the first transmission shaft (73).

3. A high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things according to claim 2, characterized in that: The scraping mechanism (8) comprises a rotating cover (81), the rotating cover (81) being arranged on the right side of the filter plate (65), the outer surface of the rotating cover (81) being arranged with a rotating scraper (82) in contact with the right side surface of the filter plate (65), the left side of the filter plate (65) being arranged with a rotating shaft (87), the right end of the rotating shaft (87) being rotated to pass through the filter plate (65) and being connected to the right inner wall of the rotating cover (81), the left end of the rotating shaft (87) being arranged with a first worm gear (88), the outer surface of the first worm gear (88) being meshingly connected with a first worm (816), the upper side of the first worm gear (816) being arranged with a second transmission shaft (815), the upper side of the blocking plate (63) being provided with a transmission cavity (89), the second transmission shaft (815) being arranged with a transmission cavity (89) ) is rotatably inserted into the transmission chamber (89); the upper end of the second transmission shaft (815) is sleeved with a second worm gear (814); the outer surface of the second worm gear (814) is meshingly connected with a second worm (813) rotatably connected to the inner wall of the transmission chamber (89); a fixing rod (810) is provided on the inner wall of the rear side of the storage groove (62) and is at the same horizontal position as the output shaft of the second motor (61); the front end of the fixing rod (810) is rotatably inserted into the transmission chamber (89); the outer surface of the fixing rod (810) located in the transmission chamber (89) is sleeved with a face gear (811); and the outer surface of one end of the second worm gear (813) close to the face gear (811) is sleeved with a self-rotating gear (812) meshingly connected to the face gear (811).

4. The high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things according to claim 3 is characterized in that: A retractable baffle mechanism (84) is provided on the right side of the filter plate (65); a material pushing mechanism (83) is provided on the side of the rotating scraper (82) close to the retractable baffle mechanism (84); an impurity collecting groove (85) is provided on the right side surface of the baffle plate (63); a connecting groove (86) connected to the collecting groove (64) is provided on the inner wall of the impurity collecting groove (85); and the connecting groove (86) is located between the retractable baffle mechanism (84) and the rotating scraper (82).

5. The high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things according to claim 4 is characterized in that: The pushing mechanism (83) comprises a movable scraper (831), the movable scraper (831) being arranged on a side of the rotating scraper (82) close to the retracting baffle mechanism (84), the left side of the movable scraper (831) being in contact with the surface of the filter plate (65) and sliding, a T-shaped slide groove (832) being provided on the outer surface of the rotating scraper (82), a connecting plate (833) being arranged on a side of the movable scraper (831) close to the T-shaped slide groove (832), the other side of the connecting plate (833) extending into a vertical groove of the T-shaped slide groove (832), and a weight-increasing block (834) sliding in the T-shaped slide groove (832) being arranged on a side of the connecting plate (833) located in the vertical groove of the T-shaped slide groove (832).

6. The high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things according to claim 5 is characterized in that: A docking block (835) is provided on a side of the weight-increasing block (834) close to the rotating cover (81); a docking groove (836) adapted to the docking block (835) is provided on an inner wall of the T-shaped slide groove (832) close to the docking block (835); when the weight-increasing block (834) is located on a side close to the rotating cover (81), the docking block (835) extends into the docking groove (836); a pushing cavity (837) is provided in the rotating scraper (82); and the pushing cavity (837) ) is provided with a locking rod (838) at one end of which slides into the docking groove (836); a locking groove adapted to the locking rod (838) is provided on the side of the docking block (835) facing the locking rod (838); a pulling plate (839) is provided at one end of the locking rod (838) located in the pushing cavity (837); and a tension spring (8310) movably sleeved on the outer surface of the locking rod (838) is provided between the pulling plate (839) and the inner wall of the pushing cavity (837).

7. The high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things according to claim 6 is characterized in that: A trigger rod (8311) is provided in the rotating cover (81), one end of the trigger rod (8311) slides through the pushing cavity (837), a trigger rotating plate (8312) is hingedly connected between the end of the trigger rod (8311) located in the pushing cavity (837) and the pulling plate (839), and an inclined plate (8313) extending into the rotating cover (81) is provided on the right side surface of the filter plate (65), and the end of the trigger rod (8311) located in the rotating cover (81) contacts the inclined surface of the inclined plate (8313).

8. The high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things according to claim 7 is characterized in that: The retractable baffle mechanism (84) comprises a limit collecting plate (841), the limit collecting plate (841) being arranged on the right side of the filter plate (65) and sliding on the right side of the filter plate (65), a reset chamber (842) being provided in the blocking plate (63), the upper side of the limit collecting plate (841) slidingly passing through the reset chamber (842), a built-in plate (843) sliding in the reset chamber (842) being arranged on one side of the limit collecting plate (841) located in the reset chamber (842), and a second spring (844) being arranged between the built-in plate (843) and the inner wall of the reset chamber (842).

9. The high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things according to claim 8, characterized in that: An extraction mechanism (9) for extracting impurities from the impurity collection tank (85) is disposed on the upper side of the collection block (5). The extraction mechanism (9) comprises an extraction tube (91). The extraction tube (91) is disposed on the upper side of the collection block (5). The lower end of the extraction tube (91) slides through the storage tank (62). An auger (92) is disposed in the extraction tube (91). The outer surface of the auger (92) is in contact with the inner wall of the extraction tube (91). The lower end of the auger (92) extends out of the extraction tube (91) and finally extends to the impurity collection tank (85). ), the upper end of the auger (92) extends out of the upper side of the extraction tube (91), a top plate (94) is provided on the upper side of the extraction tube (91), the outer surface of the extraction tube (91) located on the upper side of the collection block (5) is sleeved with a discharge platform (93), a support rod for fixing is provided between the lower surface of the top plate (94) and the outer surface of the discharge platform (93), a fourth motor (95) is provided on the top plate (94), and the lower end of the output shaft of the fourth motor (95) rotates through the lower surface of the top plate (94) and is connected to the upper end of the auger (92).

10. The high-pressure and large-caliber electromagnetic flowmeter based on the Internet of Things according to claim 9, characterized in that: The collecting block (5) is provided with an internal cavity (96) wrapped around the outside of the extraction tube (91); a sleeve ring (97) is sleeved on the outer surface of the extraction tube (91) located on the internal cavity (96); a third spring (98) is movably sleeved on the outer surface of the extraction tube (91) and is arranged between the lower surface of the sleeve ring (97) and the bottom wall of the internal cavity (96); an active cavity (99) is provided on the right inner wall of the internal cavity (96); a sleeve shaft (910) is rotatably connected between the inner walls on the front and rear sides of the active cavity (99); a rotating push plate (911) is sleeved on the outer surface of the sleeve shaft (910); the left side of the rotating push plate (911) extends into the internal cavity (96); The movable cavity (99) is provided with a push rod (912) whose lower end slides through the receiving groove (62). The lower end of the push rod (912) contacts the blocking plate (63). A movable groove (913) is provided on the right side of the rotating push plate (911). A movable rod (914) is provided on the outer surface of the push rod (912) close to the movable groove (913). One end of the movable rod (914) extends into the movable groove (913) and slides in the movable groove (913).

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