Humidity detection mechanism for organic fertilizer production

Abstract

This invention discloses a humidity detection mechanism for organic fertilizer production, relating to the field of organic fertilizer production technology. It includes a placement tray, with a motor fixedly connected to its upper surface. A detection rod is fixedly connected to the output end of the motor, and a control panel is also fixedly connected to the upper surface of the tray. A stirring mechanism is disposed on the outer side of the detection rod. During the stirring process, as the sliding tray rotates, when the magnetic properties of the second magnetic component and the corresponding part of the first magnetic component are opposite, the magnetic force drives the sliding tray to slide upwards along the guide rod. When the magnetic properties of the corresponding parts are the same, the sliding tray slides downwards along the guide rod. The sliding tray then drives the stirring blade to move up and down reciprocally via a linkage rod, further improving the comprehensiveness and uniformity of the stirring, ensuring that the fertilizer in all locations within the fertilizer tank is fully mixed, and providing a more representative sample for subsequent humidity detection.

Description

Technical Field

[0001] This invention relates to the field of organic fertilizer production technology, specifically to a humidity detection device for organic fertilizer production. Background Technology

[0002] Organic fertilizers are an important source of nutrition in agricultural production. Their moisture content is a key indicator affecting fertilizer quality, storage stability, and application effectiveness. If the moisture content is too high, organic fertilizers are prone to mold and clumping, which not only reduces fertilizer efficiency but may also produce harmful substances. If the moisture content is too low, fertilizer particles are easily broken, which can cause dust pollution during transportation and application and is not conducive to microbial activity. Therefore, accurate and efficient detection of moisture content is crucial in the production of organic fertilizers.

[0003] Existing technology 1 (Chinese patent with announcement number CN221612802U, announcement date August 27, 2024) discloses a humidity detection and control instrument for fertilizer production, which solves the problem of poor performance of existing humidity detection and control instruments. It includes a handheld humidity detection probe and a handheld display instrument. The handheld humidity detection probe and the handheld display instrument are connected by a cable. The handheld humidity detection probe consists of a tube body, a sealing head, a traction steel rope, a handle, a pull handle, a humidity detection sensor, and a miniature air pump. The top end of the traction steel rope is connected to the pull handle. The sealing head is located at the bottom of the tube body and connected to the bottom end of the traction steel rope. The humidity detection sensor is connected to the top end of one side inside the tube body. The miniature air pump is connected to the top end of one side outside the tube body and communicates with the tube body. An exhaust pipe is fixedly installed on the exhaust port of the miniature air pump. This humidity detection and control instrument can prevent waste from entering the instrument and increase the air intake, thereby improving detection efficiency.

[0004] There is also a prior art (Chinese patent CN218157811U, published on 2022-09-13) of an organic fertilizer moisture detection device, which relates to the field of fertilizer production testing technology. It includes a base plate, a moisture detector, a wire, a handle, and a detection probe. The moisture detector is fixed to the top of the base plate by bolts, and a wire is installed on the top of the moisture detector. A handle is installed at one end of the wire, and a detection probe is installed at the other end of the handle. A second motor is fixed to one side of the top of the base plate by bolts, and a cleaning mechanism is installed at the output end of the second motor. By rotating the knob on the fixing block, the abutment will press the handle, which is locked in the fixing block, so that the staff can adjust the depth of the detection probe into the organic fertilizer and perform moisture detection at different depths in the organic fertilizer, so that the staff can have a more comprehensive understanding of the moisture of the organic fertilizer.

[0005] Traditional humidity testing methods may result in significant deviations in test results due to uneven fertilizer mixing, especially for fertilizer samples with localized clumping or uneven moisture distribution. These methods struggle to accurately reflect the overall humidity level. Furthermore, fertilizer tends to adhere to the testing components during the testing process, affecting the accuracy of subsequent tests and requiring frequent cleaning, which increases operating costs and labor intensity.

[0006] Therefore, we propose a humidity detection device for organic fertilizer production to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a humidity detection mechanism for organic fertilizer production, in order to solve the problems mentioned in the background art, such as uneven mixing of fertilizers in the current market, which leads to large deviations in detection results. In particular, for fertilizer samples with local caking or uneven moisture distribution, it is difficult to accurately reflect the overall humidity. During the detection process, fertilizers are prone to adhere to the detection components, which not only affects the accuracy of subsequent detections, but also requires frequent cleaning, increasing operating costs and labor intensity.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a humidity detection mechanism for organic fertilizer production, comprising a placement tray, a motor fixedly connected to the upper surface of the placement tray, and a detection rod fixedly connected to the output end of the motor, and a control panel fixedly connected to the upper surface of the placement tray. A stirring mechanism is provided on the outside of the detection rod. The stirring mechanism drives the stirring blades contained therein to rotate by rotating the detection rod, thereby stirring the fertilizer in the fertilizer tank. A moving mechanism is provided between the stirring mechanism and the lower surface of the placement tray. The moving mechanism drives the stirring blades to move up and down reciprocally by the cooperation of the first magnetic component and the second magnetic component contained therein, thereby improving the stirring effect. A tapping mechanism is also provided on the upper surface of the stirring blades. The tapping mechanism taps the detection rod by the centrifugal force generated by the rotation of the stirring blades, thereby preventing the damp fertilizer from adhering and sticking.

[0009] Preferably, a positioning plate is fixedly connected to the side of the placement tray, and a groove is provided on the lower surface of the positioning plate. A slider is slidably connected inside the groove, and a limit plate is fixedly connected to the lower end of the slider. A first spring is fixedly connected between the side of the slider and the inside of the groove. Through the elastic action of the first spring, the fertilizer tanks of different sizes are clamped and fixed.

[0010] Preferably, the detection rod has a detection chamber inside, and the side of the detection chamber has an inlet for fertilizer to enter. The detection chamber is equipped with a detection element, and the detection chamber is electrically connected to the control panel to detect the humidity data of the fertilizer entering the detection chamber in real time and transmit the data to the control panel for display and analysis.

[0011] Preferably, a heating block is fixedly connected to the side of the detection rod, and a baffle is fixedly connected to the lower side of the heating block. The baffle is made of shape memory alloy. The position of the baffle corresponds to the feed inlet on the side of the detection chamber. The heating block is electrically connected to the control panel. In the initial state, the baffle blocks the feed inlet. The baffle folds when heated.

[0012] Preferably, the stirring mechanism includes a guide rod, which is fixedly connected to the outer side above the detection rod, and two sets of guide rods are symmetrically arranged about the center point of the detection rod, and a sliding disk is slidably connected to the outer side of the guide rod.

[0013] Preferably, the lower end of the sliding disc is fixedly connected to a linkage rod, and the stirring blade is fixedly connected to the linkage rod, and four sets of stirring blades are arranged vertically.

[0014] Preferably, the moving mechanism includes a first magnetic component, which is fixedly connected to the lower surface of the placement disk, and a second magnetic component is fixedly connected to the upper surface of the sliding disk. The second magnetic component and the first magnetic component are arranged in a circular array, and the components of the second magnetic component and the first magnetic component are arranged with magnetic intervals. When the corresponding components of the second magnetic component and the first magnetic component have opposite magnetic properties, the sliding disk slides upward.

[0015] Preferably, the striking mechanism includes a support plate, which is fixedly connected to the upper surface of the stirring blade, and a fixed bucket is fixedly connected to the support plate. Two sets of fixed buckets are symmetrically distributed about the center point of the detection rod.

[0016] Preferably, a striking rod is slidably connected inside the fixed barrel, and a second spring is fixedly connected between the inner end of the striking rod and the inside of the fixed barrel. The outer end of the striking rod is set towards the detection rod. When the detection rod is rotating, the striking rod is retracted into the fixed barrel under the action of centrifugal force.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) A motor is installed. When the motor is started, the motor drives the detection rod to start rotating. The stirring blade stirs the organic fertilizer in the fertilizer tank under the drive of the detection rod. The stirring blade fully stirs the fertilizer inside the fertilizer tank, which can effectively break the fertilizer clumping phenomenon and make the fertilizer particles more evenly dispersed, avoiding the deviation of the test results caused by local fertilizer accumulation.

[0018] (2) During the stirring process, when the sliding disk rotates to the point where the magnetic properties of the second magnetic component and the corresponding part of the first magnetic component are opposite, the magnetic force drives the sliding disk to slide upward along the guide rod. When the magnetic properties of the corresponding parts are the same, the sliding disk slides downward along the guide rod. The sliding disk then drives the stirring blade to move up and down repeatedly through the linkage rod, which further improves the comprehensiveness and uniformity of the stirring, ensuring that the fertilizer in each position in the fertilizer tank can be fully mixed, and providing a more representative test sample for subsequent humidity detection.

[0019] (3) During the stirring process of the stirring blade, the tapping rod that is slidably connected inside the fixed barrel is retracted into the fixed barrel under the action of centrifugal force. When the stirring blade rotation speed changes or the centrifugal force fluctuates during the up and down movement, the elastic force of the second spring will push the tapping rod outward, and its outer end will tap the detection rod to prevent the fertilizer from sticking to the detection rod due to moisture. This avoids the surface contamination of the detection rod caused by fertilizer adhesion and the impact on the subsequent detection accuracy, while also reducing the amount of manual cleaning work.

[0020] (4) The detection chamber inside the detection rod is the core area for humidity detection. In the initial state, the feed port on the side of the detection chamber is blocked by a baffle made of shape memory alloy. At this time, the baffle is in the unfolded state, which can effectively prevent external impurities or unevenly stirred fertilizer from entering the detection chamber.

[0021] (5) When humidity detection is required, the heating block is activated through the control panel. The heating block generates heat and transfers it to the baffle. The baffle made of shape memory alloy folds after being heated, thereby opening the feed port. During the process of the stirring mechanism fully stirring the fertilizer, the uniform fertilizer particles will enter the detection chamber through the feed port. The detection device set inside the detection chamber can detect the humidity data of the fertilizer in real time. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional bottom view structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the limiting plate of the present invention; Figure 4 This is a three-dimensional cross-sectional view of the detection rod of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the linkage rod of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the guide rod of the present invention; Figure 7 This is a three-dimensional structural diagram of the second magnetic component of the present invention; Figure 8This is a schematic diagram of the three-dimensional structure of the stirring blade of the present invention; Figure 9 This is a three-dimensional cross-sectional view of the fixed bucket structure of the present invention.

[0023] In the diagram: 1. Placement tray; 2. Positioning plate; 3. Limiting plate; 4. Slide groove; 5. Slider; 6. First spring; 7. Motor; 8. Control panel; 9. Detection rod; 10. Sliding disc; 11. First magnetic component; 12. Second magnetic component; 13. Stirring blade; 14. Heating block; 15. Baffle plate; 16. Detection chamber; 17. Linkage rod; 18. Guide rod; 19. Support plate; 20. Fixed bucket; 21. Striking rod; 22. Second spring. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: As Figure 1 - Figure 4 The present invention provides the following technical solution: a humidity detection mechanism for organic fertilizer production, wherein a motor 7 is fixedly connected to the upper surface of a placement tray 1, and a detection rod 9 is fixedly connected to the output end of the motor 7; a control panel 8 is also fixedly connected to the upper surface of the placement tray 1; a positioning plate 2 is fixedly connected to the side of the placement tray 1; a groove 4 is formed on the lower surface of the positioning plate 2; a slider 5 is slidably connected inside the groove 4; a limit plate 3 is fixedly connected to the lower end of the slider 5; a first spring 6 is fixedly connected between the side of the slider 5 and the inside of the groove 4; and the detection rod 9... The device has an internal detection chamber 16 with a feed inlet on its side for fertilizer to enter. A detection element is installed inside the detection chamber 16. The detection chamber 16 is electrically connected to the control panel 8 to detect the humidity data of the fertilizer entering the detection chamber 16 in real time and transmit the data to the control panel 8 for display and analysis. A heating block 14 is fixedly connected to the side of the detection rod 9, and a baffle 15 is fixedly connected to the lower side of the heating block 14. The baffle 15 is made of shape memory alloy and corresponds to the feed inlet on the side of the detection chamber 16. The heating block 14 is electrically connected to the control panel 8. In the initial state, the baffle 15 blocks the feed inlet, and the baffle 15 folds when heated.

[0026] When fertilizer tanks of different sizes need to be tested, the fertilizer tank is placed on the placement tray 1. Under the elastic action of the first spring 6, the limiting plate 3 can automatically adapt to the size of the fertilizer tank by sliding the slider 5 in the slide groove 4. The fertilizer tank is stably clamped from both sides, which effectively ensures the stability of the fertilizer tank during the testing process and avoids the fertilizer tank from shaking or tipping over during subsequent testing, thus ensuring the smooth progress of the testing work.

[0027] Before testing begins, the baffle 15 is in the unfolded state, tightly sealing the feed inlet of the testing chamber 16 to prevent insufficiently stirred fertilizer or external impurities from entering the testing chamber 16 before stirring or during non-testing stages, thus avoiding contamination of the test specimens or affecting the accuracy of the test data. When testing is required, the operator issues a command through the control panel 8 to activate the heating block 14. The heating block 14 rapidly heats up and transfers heat to the baffle 15, which is fixedly connected to it. Because the baffle 15 is made of shape memory alloy, its shape changes when it reaches a specific temperature, folding inward from the unfolded state, thereby opening the feed inlet on the side of the testing chamber 16. At this time, under the continuous stirring of the stirring blade 13, the fertilizer particles can smoothly pass through the feed inlet into the testing chamber 16. The test specimens inside the testing chamber 16 immediately react with the incoming fertilizer particles. The fertilizer is subjected to humidity detection, and the detected humidity data is transmitted to the control panel 8 in real time. After receiving the data, the control panel 8 quickly processes and analyzes it, and displays it on the screen in clear numerical or graphical form for easy reading and recording by the staff. After the detection is completed, the heating block 14 is turned off through the control panel 8, and the baffle 15 gradually returns to its initial unfolded state as the temperature decreases, sealing the feed inlet again to prevent fertilizer residue or external contaminants from entering the detection chamber 16 after detection, keeping the inside of the detection chamber 16 clean and preparing for the next detection. At the same time, the heating block 14 is small in size, and its heat only acts on a local area of ​​the baffle 15, which will not significantly affect the temperature of the detection element or the surrounding fertilizer inside the detection chamber 16, avoiding interference with the accuracy of humidity detection due to temperature changes.

[0028] Example 2: Figure 5 - Figure 7The present invention provides the following technical solution: a humidity detection mechanism for organic fertilizer production, wherein a stirring mechanism is provided on the outside of the detection rod 9, and the stirring mechanism drives the stirring blade 13 contained therein to rotate through the rotation of the detection rod 9 to achieve stirring of the fertilizer in the fertilizer tank; a moving mechanism is provided between the stirring mechanism and the lower surface of the placement tray 1, and the moving mechanism drives the stirring blade 13 to move up and down reciprocally through the mutual cooperation of the first magnetic component 11 and the second magnetic component 12 contained therein, thereby improving the stirring effect; the stirring mechanism includes a guide rod 18, the guide rod 18... 8 is fixedly connected to the upper outer side of the detection rod 9, and two sets of guide rods 18 are symmetrically arranged about the center point of the detection rod 9. A sliding disk 10 is slidably connected to the outer side of the guide rod 18. A linkage rod 17 is fixedly connected to the lower end of the sliding disk 10. The stirring blade 13 is fixedly connected to the linkage rod 17. Four sets of stirring blades 13 are arranged vertically. The striking mechanism includes a support plate 19, which is fixedly connected to the upper surface of the stirring blade 13. A fixed bucket 20 is fixedly connected to the support plate 19. Two sets of fixed buckets 20 are symmetrically distributed about the center point of the detection rod 9.

[0029] Before conducting the testing, the motor 7 is started. The output shaft of the motor 7 drives the detection rod 9 to start rotating stably. The two sets of guide rods 18, which are symmetrically fixed on the outer side of the detection rod 9, also rotate synchronously. Since the sliding disk 10 is slidably connected to the outer side of the guide rod 18, the sliding disk 10 moves in a circular motion under the drive of the guide rod 18. The lower end of the sliding disk 10 is fixedly connected to four sets of vertically arranged stirring blades 13 through the linkage rod 17. Driven by the detection rod 9, these four sets of stirring blades 13 rotate and stir the organic fertilizer in the fertilizer tank with the detection rod 9 as the center. During the rotation, the stirring blades 13 can penetrate into the fertilizer and break up any clumps of fertilizer that may exist. This allows the fertilizer particles to flow and mix fully in the tank, effectively avoiding the uneven density caused by local accumulation of fertilizer, and providing a more uniform material basis for subsequent humidity testing.

[0030] While the sliding disk 10 rotates, the second magnetic component 12 fixed on the upper surface of the sliding disk 10 and the first magnetic component 11 fixed on the lower surface of the placement disk 1 rotate relative to each other. Since the components of the two are magnetically spaced, when they rotate to a certain position, so that the corresponding components of the second magnetic component 12 and the first magnetic component 11 have opposite magnetic properties, the magnetic attraction will pull the sliding disk 10 to slide upward along the guide rod 18. When they continue to rotate until the corresponding components have the same magnetic properties, the repulsive force will push the sliding disk 10 to slide downward along the guide rod 18. The sliding disk 10 drives the stirring blade 13 through the linkage rod 17 to achieve a compound motion of rotating and reciprocating up and down at the same time. This allows the stirring blade 13 to not only stir the fertilizer in the horizontal direction, but also to tumble the fertilizer at different depths in the vertical direction, which greatly improves the comprehensiveness and uniformity of the stirring, ensuring that the fertilizer in the fertilizer tank from top to bottom and from the center to the edge can be fully and evenly mixed.

[0031] Example 3: Figure 8 and Figure 9 The present invention provides the following technical solution: a humidity detection mechanism for organic fertilizer production, wherein the upper surface of the stirring blade 13 is provided with a striking mechanism, which uses the centrifugal force generated by the rotation of the stirring blade 13 to strike the detection rod 9, thereby preventing the wet fertilizer from adhering and sticking. The striking mechanism includes a support plate 19, which is fixedly connected to the upper surface of the stirring blade 13, and a fixed bucket 20 is fixedly connected to the support plate 19. At the same time, two sets of fixed buckets 20 are symmetrically distributed about the center point of the detection rod 9. A striking rod 21 is slidably connected inside the fixed bucket 20, and a second spring 22 is fixedly connected between the inner end of the striking rod 21 and the inside of the fixed bucket 20. The outer end of the striking rod 21 is set towards the side of the detection rod 9. When the detection rod 9 is rotating, the striking rod 21 is retracted into the fixed bucket 20 under the action of centrifugal force.

[0032] During the rotation of the stirring blade 13, the two sets of fixed barrels 20 fixed on the support plate 19 rotate together with the stirring blade 13. The striking rod 21, which is slidably connected inside the fixed barrel 20, will retract into the fixed barrel 20 under the action of centrifugal force, overcoming the tension of the second spring 22. When the stirring blade 13 moves up and down due to the action of the moving mechanism, causing slight changes in its rotation radius or speed, or when affected by the fluctuation of fertilizer resistance during rotation, the centrifugal force will also fluctuate accordingly. The elastic force of the second spring 22 will push the striking rod 21 to extend outward. Its outer end can intermittently strike the outer wall of the detection rod 9, effectively shaking off the wet fertilizer particles attached to the surface of the detection rod 9, preventing these wet fertilizer particles from continuously sticking to the detection rod 9 due to stickiness. This avoids the contamination of the detection rod 9 surface by fertilizer adhesion and the possible adverse effects on the subsequent humidity detection accuracy. It also significantly reduces the workload of manually cleaning the detection rod 9 periodically and improves the maintenance convenience of the equipment.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A humidity detection mechanism for organic fertilizer production, comprising a placement tray (1), wherein a motor (7) is fixedly connected to the upper surface of the placement tray (1), and a detection rod (9) is fixedly connected to the output end of the motor (7), and a control panel (8) is also fixedly connected to the upper surface of the placement tray (1), characterized in that, A stirring mechanism is provided on the outside of the detection rod (9). The stirring mechanism drives the stirring blade (13) contained therein to rotate by rotating the detection rod (9) to stir the fertilizer in the fertilizer tank. A moving mechanism is provided between the stirring mechanism and the lower surface of the placement tray (1). The moving mechanism drives the stirring blade (13) to move up and down repeatedly by the cooperation of the first magnetic component (11) and the second magnetic component (12) contained therein, thereby improving the stirring effect. A tapping mechanism is also provided on the upper surface of the stirring blade (13). The tapping mechanism taps the detection rod (9) by the centrifugal force generated by the rotation of the stirring blade (13) to prevent the wet fertilizer from adhering and sticking.

2. The humidity detection mechanism for organic fertilizer production according to claim 1, characterized in that: The side of the placement tray (1) is fixedly connected to a positioning plate (2), and a groove (4) is provided on the lower surface of the positioning plate (2). A slider (5) is slidably connected inside the groove (4), and a limit plate (3) is fixedly connected to the lower end of the slider (5). A first spring (6) is fixedly connected between the side of the slider (5) and the inside of the groove (4). Through the elastic action of the first spring (6), the clamping and fixing of fertilizer tanks of different sizes can be achieved.

3. The humidity detection mechanism for organic fertilizer production according to claim 1, characterized in that: The detection rod (9) has a detection chamber (16) inside, and the side of the detection chamber (16) has a feed port for fertilizer to enter. The detection chamber (16) is equipped with a detection component. The detection chamber (16) is electrically connected to the control panel (8) to detect the humidity data of the fertilizer entering the detection chamber (16) in real time and transmit the data to the control panel (8) for display and analysis.

4. The humidity detection mechanism for organic fertilizer production according to claim 3, characterized in that: A heating block (14) is fixedly connected to the side of the detection rod (9), and a baffle (15) is fixedly connected to the lower side of the heating block (14). The baffle (15) is made of shape memory alloy. The baffle (15) corresponds to the feed inlet on the side of the detection chamber (16). The heating block (14) is electrically connected to the control panel (8). In the initial state, the baffle (15) blocks the feed inlet. The baffle (15) folds when heated.

5. The humidity detection mechanism for organic fertilizer production according to claim 4, characterized in that: The stirring mechanism includes a guide rod (18), which is fixedly connected to the outer side of the detection rod (9). Two sets of guide rods (18) are symmetrically arranged about the center point of the detection rod (9), and a sliding disk (10) is slidably connected to the outer side of the guide rod (18).

6. The humidity detection mechanism for organic fertilizer production according to claim 5, characterized in that: The lower end of the sliding disk (10) is fixedly connected to a linkage rod (17), and the stirring blade (13) is fixedly connected to the linkage rod (17), and the stirring blade (13) is vertically arranged in four sets.

7. The humidity detection mechanism for organic fertilizer production according to claim 6, characterized in that: The moving mechanism includes a first magnetic component (11), which is fixedly connected to the lower surface of the placement disk (1). A second magnetic component (12) is fixedly connected to the upper surface of the sliding disk (10). The second magnetic component (12) and the first magnetic component (11) are arranged in a ring array. The components of the second magnetic component (12) and the first magnetic component (11) are arranged in a magnetically spaced manner. When the corresponding components of the second magnetic component (12) and the first magnetic component (11) have opposite magnetic properties, the sliding disk (10) slides upward.

8. The humidity detection mechanism for organic fertilizer production according to claim 7, characterized in that: The striking mechanism includes a support plate (19), which is fixedly connected to the upper surface of the stirring blade (13), and a fixed bucket (20) is fixedly connected to the support plate (19). At the same time, two sets of fixed buckets (20) are symmetrically distributed about the center point of the detection rod (9).

9. A humidity detection mechanism for organic fertilizer production according to claim 8, characterized in that: The fixed barrel (20) is slidably connected to a striking rod (21), and a second spring (22) is fixedly connected between the inner end of the striking rod (21) and the inside of the fixed barrel (20). The outer end of the striking rod (21) is set towards the side of the detection rod (9). When the detection rod (9) is rotating, the striking rod (21) is retracted into the fixed barrel (20) under the action of centrifugal force.

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