Ship lift pulley block level detection device and method

Abstract

The ship lift pulley block level detection device mainly comprises a base, a lifting adjusting mechanism is installed on the base, and the lifting adjusting mechanism conducts lifting adjustment on a cross arm; the cross arm is provided with at least two groups of dial gauges, and upper end detection parts of the dial gauges are contacted with the flat arc surface of the pulley. According to the ship lift pulley block level detection device and method, the detection efficiency and reliability can be improved.

Description

Technical Field

[0001] This invention relates to the field of ship lift operation and maintenance technology, and in particular to a ship lift pulley block level detection device and method. Background Technology

[0002] As a key piece of equipment in large-scale water conservancy projects, the operational status of the pulley system in a ship lift directly affects the smoothness and safety of ship lifting. During long-term operation, factors such as load variations, mechanical wear, or installation errors can cause levelness deviations in the pulley system, leading to problems such as uneven wear of the wire ropes and abnormal wear of the pulley bearings. In severe cases, this can even cause equipment jamming or failure. Therefore, regularly checking the levelness of the pulley system is crucial to ensuring the reliable operation of the ship lift.

[0003] Currently, the following technical shortcomings exist in the field of levelness testing of ship lift pulley systems: 1) Insufficient detection accuracy: Traditional detection methods mostly use a single measurement point, which cannot fully reflect the actual level status of the pulley system; 2) Poor adaptability: Most testing devices adopt a fixed structure design, which cannot adapt to the testing needs of pulley blocks of different specifications. Especially in large ship lifts, the applicability of the testing devices is severely limited. 3) Insufficient stability: Traditional detection devices are prone to measurement errors in vibration environments and lack effective locking mechanisms, which makes the device prone to displacement during the measurement process; 4) Lack of dynamic detection capability: Existing technology mainly performs static detection and cannot detect the horizontal changes of the pulley block in real time during operation, making it difficult to detect potential safety hazards. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a horizontal detection device and method for a ship lift pulley block. Through structural optimization and functional integration, it effectively solves the problems of insufficient detection accuracy, poor adaptability, insufficient stability and lack of dynamic detection capability, improves detection efficiency and reliability, and ensures the safe and efficient operation of the ship lift system.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A horizontal detection device for a pulley block of a ship lift includes a base, on which a lifting adjustment mechanism is installed to adjust the height of the cross arm; at least two dial indicators are installed on the cross arm, and the upper detection part of the dial indicator contacts the flat arc surface of the pulley.

[0006] The base includes a support base, on which at least three sets of adjusting bolts are installed circumferentially.

[0007] The adjusting bolt includes a bolt that freely passes through a support base. The bolt is threaded with a lock nut and an adjusting nut on its upper and lower sides, respectively. A pad made of rubber is placed at the bottom of the bolt.

[0008] The lifting and adjusting mechanism includes a column sleeve, which is fixed on a support base; a gear shaft is rotatably mounted on the column sleeve, a gear is mounted on the gear shaft, the gear meshes with a rack, and the back of the rack slides up and down along a sliding groove via a sliding support plate. The sliding groove is located on the inner wall of the column sleeve and is arranged along the length direction.

[0009] A handwheel is welded to one end of the gear shaft, and a locking nut is threaded to the other end of the gear shaft. The locking nut is locked in place by friction with the side wall of the column sleeve.

[0010] The cross arm is fixed to the sliding support plate, and a T-shaped groove is provided at the upper end of the cross arm. The slider slides in cooperation with the T-shaped groove.

[0011] The back of the cross arm is provided with a row of spaced bolt holes, and the locking screw is threaded into the bolt holes and pressed against the slider.

[0012] There are two sets of sliders, and two sets of corresponding dial gauges, with each set of dial gauges set on one slider.

[0013] The sliding part of the slider has an inverted T-shaped structure, which matches the T-shaped groove.

[0014] A method for leveling a pulley block of a ship lift includes the following steps: Step 1: Place this device directly below the pulley. At this time, the probe of this device is a certain distance away from the flat arc surface of the pulley. Step 2: Loosen the locking nut, turn the handwheel, the gear rotates, the gear drives the rack to move upward, causing the sliding support plate to drive the horizontal arm to rise until the dial indicator probe approaches the arc surface of the pulley and stops. At this time, tighten the locking nut to lock the position of the device in the vertical direction. Step 3: Loosen the locking nuts of each adjusting bolt, adjust the position of the three adjusting nuts, and observe the level bubble in the spirit level on the horizontal arm. When the entire device is in a horizontal state, tighten the locking nuts of each adjusting bolt to keep the entire device in a horizontal state. Step 4: Move the slider on the cross arm to align the probes of the two dial indicators with the center line of the arc surface of the pulley; repeat the operation of Step 2 until the probes of the dial indicators contact the arc surface of the pulley. Step 5: Zero-point calibration of the dial indicator; then rotate the pulley at a constant speed for one revolution, observe the synchronous change of the pointers of the two dial indicators, and read the maximum difference between the two dial indicators. This difference is the offset of the pulley.

[0015] This invention provides a device and method for detecting the level of a pulley block in a ship lift, which has the following technical advantages: 1) High-precision detection capability: The dual dial indicator synchronous detection design and T-shaped slide structure realize the precise positioning of the measurement point, which can comprehensively reflect the horizontal status of the pulley group and avoid misjudgment caused by local errors.

[0016] 2) Excellent adaptability: The modular design supports quick adjustment, the gear and rack mechanism can realize the vertical displacement adjustment of the device, and the three-point leveling mechanism, together with the T-slider, ensures the compatibility of the detection device with various pulley groups.

[0017] 3) Excellent stability: The triple locking mechanism, consisting of the gear shaft locking nut, the adjusting bolt locking nut, and the slider locking screw, ensures the stability of the measurement process. The circular anti-slip rubber pad design can effectively absorb vibration and reduce the impact of environmental vibration.

[0018] 4) Dynamic detection function: It can realize real-time level detection of the pulley block during operation. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the arrangement of the present invention.

[0020] Figure 2 for Figure 1 A partial schematic diagram.

[0021] Figure 3 This is a schematic diagram of the structure of the present invention.

[0022] Figure 4 This is the front view of the present invention.

[0023] Figure 5 This is a top view of the lifting and adjusting mechanism in this invention.

[0024] Figure 6 This is a schematic diagram of the cross arm and dial indicator in this invention.

[0025] Figure 7 This is a rear view of the cross arm and dial indicator in this invention.

[0026] Figure 8 This is a partial schematic diagram of the base in this invention.

[0027] In the diagram: 1. Base; 2. Lifting and adjusting mechanism; 3. Cross arm; 4. Dial indicator; 5. Pulley block; 101. Support seat; 102. Adjusting bolt one; 103. Adjusting bolt two; 104. Adjusting bolt three; 105. Locking nut; 106. Adjusting nut; 107. Pad; 201. Sliding support plate; 202. Rack; 203. Lifting and adjusting mechanism sleeve; 204. Gear; 205. Gear shaft; 206. Handwheel; 207. Locking nut; 208. Slide groove; 301. Level; 302. T-slide groove; 303. Slider; 304. Bolt hole; 305. Locking screw; 401. Measuring rod; 402. Dial; 403. Embedded part; 6. Horizontal test tube; 7. Detailed Implementation

[0028] like Figure 1-2 As shown, a level detection device for a ship lift pulley block includes a base 1, a lifting adjustment mechanism 2, a cross arm 3, and a dial indicator 4. The base 1 supports the device and calibrates its overall level. The lifting adjustment mechanism 2 is vertically mounted on the base 1 and is used to adjust the height of the device. The cross arm 3 is mounted above the lifting adjustment mechanism 2 and is used to adjust the lateral position of the dial indicator 4, which measures the offset of the pulley 5. A level test tube 7 passes through an embedded part 6; the tube wall has graduations, and water is filled inside to reflect the levelness of the embedded part.

[0029] like Figure 3 As shown, the base 1 includes a support 101, on which three sets of adjusting bolts are arranged circumferentially. The support 101 is used to support the entire device and to adjust the level of the entire device through the three sets of adjusting bolts.

[0030] The three sets of adjusting bolts are adjusting bolt one 102, adjusting bolt two 103, and adjusting bolt three 104.

[0031] like Figure 8 As shown, the three sets of adjusting bolts have identical structures. Each set includes a bolt 104, a locking nut 105, an adjusting nut 106, and a pad 107. The bolt 104 provides vertical support for the up-and-down adjustment of the base 1. The bolt 104 passes through a through hole on the base 1 and is threadedly connected to the locking nut 105 and the adjusting nut 106 at the top and bottom of the base 1, respectively. The locking nut 105 is tightened after the bolt 104 is adjusted to the correct position. The adjusting nut 106 adjusts the entire device horizontally after the locking nut 105 is loosened. The pad 107 is located at the lower end of the bolt 104. Its bottom is a circular rubber structure, which can be used for anti-slip and vibration absorption, reducing interference from external vibrations. The circular pad can also adapt to uneven ground, increasing the stability of the device.

[0032] like Figures 3-5As shown, the lifting adjustment mechanism 2 includes a lifting adjustment mechanism sleeve 203, which is vertically welded to the upper surface of the base 1. The sleeve 203 provides protection for the lifting adjustment mechanism 2 and supports the gear shaft 205. A groove 208 is formed along the length of one side of the lifting adjustment mechanism sleeve 203, and a sliding support plate 201 slides up and down along the groove 208. A rack 202 is mounted on the end face of the sliding support plate 201 and moves up and down with it. A gear shaft 205 is rotatably mounted at a suitable position on the lifting adjustment mechanism sleeve 203, and a gear 204 is mounted on the gear shaft 205, meshing with the rack 202.

[0033] A handwheel is welded to one end of the gear shaft 205, which allows the gear to rotate. The other end of the gear shaft 205 has threads, and the gear shaft 205 is threadedly connected to the locking nut 207.

[0034] When adjustment is needed, loosen the locking nut 207, turn the handwheel, and the gear 204 will rotate and drive the rack 202 and the sliding support plate 201 to move up and down to the appropriate position; after reaching the designated position, tighten the locking nut 207, and the gear 204 will be locked by the friction between the locking nut 207 and the outer wall of the lifting adjustment mechanism sleeve 203.

[0035] Preferably, the cross-section of the slide groove 208 is trapezoidal, and the slide groove 208 provides guidance for the movement of the sliding support plate 201.

[0036] like Figure 6 As shown, the horizontal arm 3 is T-shaped. A level 301 is installed on the longitudinal rod of the horizontal arm 3. The level 301 is filled with a liquid with a low viscosity coefficient, and the part without liquid is a level bubble. When the level bubble is in the middle position, it indicates that the device is currently in a horizontal state. A T-shaped groove 302 is provided on the transverse rod of the horizontal arm 3, and the slider 303 slides in contact with the T-shaped groove 302. The T-shaped groove 302 provides a track for the horizontal displacement of the slider 303, enabling the slider 303 to move left and right.

[0037] Preferably, the upper opening of the T-shaped groove 302 is chamfered at 45° on both sides to cooperate with the slider 303, so as to reduce the friction when the slider slides.

[0038] Preferably, the sliding part of the slider 303 has an inverted T-shaped structure, which fully matches the T-shaped groove 302 and can move laterally within the T-shaped groove 302.

[0039] Preferably, a row of bolt holes 304 are arranged at intervals on the back of the transverse bar of the cross arm 3. The bolt holes 304 correspond to the bottom of the T-shaped slide groove 302. The locking screw 305 passes through the bolt holes 304 to press the slider 303, thereby locking the slider 303.

[0040] Preferably, there are multiple sets of sliders 303, and a dial indicator 4 is installed above each set of sliders 303.

[0041] The number of dial indicators 4 installed in a set is fixed at 2. The difference between the readings of the two dial indicators is used to determine whether the pulley has shifted.

[0042] The dial indicator 4 is existing technology. The dial indicator 4 includes a dial 403, on which a measuring rod 402 is mounted. A probe 401 is connected to the end of the measuring rod 402, and the probe 401 directly contacts the flat, arc-shaped surface of the pulley 5 being measured. The measuring rod 402 is used to transmit displacement, and the dial 403 is used to convert the displacement generated by the measuring rod 402 into a pointer test result, and to obtain the offset of the pulley 5 through the reading.

[0043] Working principle and process: The pulley level detection device is in its initial state: Step 1: As Figure 1 As shown, the device is positioned directly below the pulley 5. At this time, the probe 401 of the device is still some distance away from the flat arc surface of the pulley 5.

[0044] Adjustment of pulley level detection device: Step 2: Loosen the locking nut 207 on the threaded end of the gear shaft 205, rotate the handwheel 206 counterclockwise to drive the gear 204 to rotate, which in turn drives the rack 202 and the sliding support plate 201 to raise the horizontal arm 3 until the probe 401 of the dial indicator 4 approaches the arc surface of the pulley. At this point, tighten the locking nut 207 on the threaded end of the gear shaft 205 to lock the position of the device in the vertical direction.

[0045] Step 3: Loosen the locking nuts 105 of each adjusting bolt, adjust the position of the three adjusting nuts 106, and at the same time observe the level bubble in the level 301 on the horizontal arm 3. When the level bubble is at the center position, it indicates that the entire device is currently in a horizontal state. At this time, tighten the locking nuts 105 of each adjusting bolt to keep the entire device in a horizontal state.

[0046] Step 4: Move the slider 303 on the horizontal arm 3 to align the probes 401 of the two dial indicators 4 with the center line of the pulley's arc surface; repeat step 2 until the probes 401 of the dial indicators 4 contact the pulley's arc surface, as shown. Figure 2 As shown.

[0047] Pulley level detection device test: Step 5: Zero-calibrate dial indicator 4 so that its pointer is aligned with "0"; rotate pulley 5 at a constant speed for one revolution and observe the synchronous change of the pointers of the two dial indicators 4. Read the maximum difference between the two dial indicators 4 (e.g., if the peak value of indicator A is +0.08mm and the peak value of indicator B is -0.03mm, then the dynamic deviation is 0.11mm). This difference is the offset of pulley 5. A deviation within 5mm is appropriate. If the deviation is too large, the pulley needs to be leveled or replaced.

[0048] Meanwhile, by observing the difference in readings on both sides of the horizontal test tube 7, the horizontal condition of the embedded part 6 can be reflected. Based on this, the embedded part can be repaired to eliminate the influence of embedded part wear on the pulley's horizontality.

Claims

1. A horizontal detection device for a ship lift pulley block, characterized in that: Includes a base (1), on which a lifting adjustment mechanism (2) is installed, which adjusts the horizontal arm (3) by lifting; at least two dial gauges (4) are installed on the horizontal arm (3), and the upper detection part of the dial gauge (4) contacts the flat arc surface of the pulley (5); the horizontal test tube (7) passes through the embedded part (6) and water is injected into the tube.

2. The horizontal detection device for a ship lift pulley block according to claim 1, characterized in that: The base (1) includes a support (101), and at least three sets of adjusting bolts are installed circumferentially on the support (101).

3. The horizontal detection device for a ship lift pulley block according to claim 2, characterized in that: The adjusting bolt includes a bolt (104), which freely passes through the support base (101). The bolt (104) is threaded with a locking nut (105) and an adjusting nut (106) on the upper and lower parts of the support base (101), respectively. A pad (107) is arranged at the bottom of the bolt (104), and the pad (107) is made of rubber.

4. The horizontal detection device for a ship lift pulley block according to claim 2, characterized in that: The lifting adjustment mechanism (2) includes a column sleeve (203), which is fixed on the support base (101); a gear shaft (205) is rotatably mounted on the column sleeve (203), and a gear (204) is mounted on the gear shaft (205). The gear (204) meshes with the rack (202), and the back of the rack (202) slides up and down along the slide groove (208) through the sliding support plate (201). The slide groove (208) is located on the inner wall of the column sleeve (203) and is arranged along the length direction.

5. The horizontal detection device for a ship lift pulley block according to claim 4, characterized in that: A handwheel is welded to one end of the gear shaft (205), and a locking nut (207) is threaded to the other end of the gear shaft (205). The locking nut (207) is rubbed and locked to the side wall of the column sleeve (203).

6. The horizontal detection device for a ship lift pulley block according to claim 4, characterized in that: The cross arm (3) is fixed on the sliding support plate (201). The upper end of the cross arm (3) is provided with a T-shaped groove (302), and the slider (303) slides in cooperation with the T-shaped groove (302).

7. The horizontal detection device for a ship lift pulley block according to claim 6, characterized in that: The back of the cross arm (3) is provided with a row of spaced bolt holes (304), and the locking screw (305) is threadedly connected to the bolt holes (304) and pressed against the slider (303).

8. The horizontal detection device for a ship lift pulley block according to claim 7, characterized in that: The slider (303) consists of two sets, and the corresponding dial gauge (4) consists of two sets, with each set of dial gauge (4) being set on a slider (303).

9. A horizontal detection device for a ship lift pulley block according to claim 8, characterized in that: The sliding part of the slider (303) has an inverted T-shaped structure, which matches the T-shaped groove (302).

10. A method for leveling a pulley block of a ship lift according to claim 9, characterized in that: Includes the following steps: Step 1: Place the device directly below the pulley (5). At this time, the probe (401) of the device is a certain distance away from the flat arc surface of the pulley (5). Step 2: Loosen the locking nut (207), turn the handwheel (206), the gear (204) rotates, the gear (204) drives the rack (202) to move upward, causing the sliding support plate (201) to drive the horizontal arm (3) to rise until the probe (401) of the dial indicator (4) approaches the arc surface of the pulley (5) and stops. At this time, tighten the locking nut (207) to lock the position of the device in the vertical direction. Step 3: Loosen the locking nuts (105) of each adjusting bolt, adjust the position of the three adjusting nuts (106), and observe the level bubble in the level (301) on the horizontal arm (3). When the whole device is in a horizontal state, tighten the locking nuts (105) of each adjusting bolt to keep the whole device in a horizontal state. Step 4: Move the slider (303) on the horizontal arm (3) so that the probes (401) of the two dial indicators (4) are aligned with the center line of the arc surface of the pulley (5); repeat the operation of step 2 until the probes (401) of the dial indicator (4) are in contact with the arc surface of the pulley. Step 5: Zero-point calibration of dial indicator (4); then rotate pulley (5) at a constant speed for one revolution, observe the synchronous change of the pointers of the two dial indicators (4), and read the maximum difference between the two dial indicators (4). This difference is the offset of pulley (5); at the same time, observe the difference in readings on both sides of the horizontal test tube (7), which can reflect the level of the embedded part (6). Based on this, repair the embedded part to eliminate the influence of embedded part wear on the level of the pulley.

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