A kind of adjusting device and adjusting method for coke oven door spring plunger adjustment

Abstract

A kind of adjusting device and adjusting method for coke oven door spring plunger adjustment, it includes: fixed support, one end is built on spring plunger side coke oven door body;Fixed support other end protrudes a fixed block;Adjusting mechanism, including: fixed seat;Motor and speed reducer, are located on fixed seat, and the output end of speed reducer is vertically upward;Transmission device, is located at the output end of speed reducer;Push rod, is located at the output end of transmission device, and the fixed block of push rod terminal is connected with the fixed support;Top pressure block, one end is connected to the fixed seat, and the other end is located at the side of coke oven door body, and the lower end of plunger rod of spring plunger is contacted;Displacement detector, is located at the output end of motor or speed reducer or transmission device;Force sensor, is located at the terminal of push rod;Controller, motor, displacement detector, force sensor are electrically connected with controller respectively.The present application can accurately adjust spring plunger, quantify the spring degradation data that previous manual cannot measure, reduce the work intensity of artificial adjustment.

Description

Technical Field

[0001] This invention belongs to the field of coke oven automation, and particularly relates to an adjustment device and adjustment method for adjusting the spring plunger of a coke oven door. Background Technology

[0002] The coke oven door is an important component for isolating the coke oven carbonization chamber from air and for coking to take place. If the door is not properly sealed, raw coal gas will escape from the carbonization chamber, causing environmental pollution and reducing the quality of coke.

[0003] The coke oven body has a cast iron frame, and the oven door has a bladed web. A large preload is applied to the bladed web by spring plungers on the oven door, pressing the bladed web tightly against the oven frame to achieve a seal. Typically, a single oven door has more than 50 spring plungers. The main components are springs, nuts, and screws that contact the bladed web. The pressure of the screws on the bladed web is adjusted by changing the displacement of the nuts, thus regulating the spring compression.

[0004] Spring plungers are prone to degradation due to prolonged exposure to the high temperatures during the coking process. Typically, during manual offline calibration, the screw displacement change is simply measured with a ruler; if it falls within a certain range, the spring plunger's degradation is indirectly determined. This method is too qualitative, lacks standardized measurement standards, has low accuracy, and the results cannot be quantitatively analyzed. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustment device and method for adjusting the spring plunger of a coke oven door. It can accurately adjust the spring plunger, quantify spring deterioration data that was previously impossible to measure manually, which is conducive to the refined management of the oven door; reduce the workload of manual adjustment, reduce the occurrence of smoke leakage from the oven door, and has significant environmental protection effects; and has the advantages of convenient operation and portability.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A calibration device for adjusting the spring plunger of a coke oven door, comprising:

[0008] A fixed bracket, one end of which is attached to the coke oven door body on the side of the spring plunger; a fixed block protrudes from the other end of the fixed bracket;

[0009] Calibration agencies include:

[0010] Fixed base;

[0011] The motor and reducer are mounted on the fixed base, with the output end of the reducer pointing vertically upwards.

[0012] The transmission device is located at the output end of the reducer;

[0013] A push rod is provided at the output end of the transmission device, and the end of the push rod is connected to the fixing block of the fixed bracket;

[0014] The top pressure block has one end connected to the fixed seat and the other end located on one side of the coke oven door body, in contact with the lower end of the spring plunger rod;

[0015] Displacement detector, installed at the output end of motor or reducer, or at the output end of transmission device;

[0016] A force sensor is located at the end of the push rod;

[0017] The controller is electrically connected to the motor, displacement detector, and force sensor.

[0018] Preferably, the transmission device is a worm gear or rack and pinion structure.

[0019] Preferably, the displacement detector is an encoder, which is coaxially mounted at the output end of the motor or reducer.

[0020] Preferably, the displacement detector is a displacement sensor, installed on a fixed base or top pressure block, to measure the distance to the fixed support; or installed on a fixed support to measure the distance to the fixed base or top pressure block.

[0021] Preferably, the fixing bracket includes: a base plate; a fixing plate formed by bending upward from the rear end of the base plate, with a fixing block provided in the center of the outer side of the fixing plate; at least one inverted U-shaped support portion formed by bending from the front end of the base plate, which can be attached to the coke oven door body; and a groove or through hole provided in the center of the base plate for the spring plunger to pass through.

[0022] Preferably, two inverted U-shaped support portions are symmetrically arranged at the front end of the substrate.

[0023] The present invention also provides a calibration method using the calibration device, which includes the following steps:

[0024] 1) Place one end of the fixed bracket of the adjustment device on the coke oven door body on the side of a certain spring plunger, and place the top pressure block below the end of the spring plunger;

[0025] 2) Using one end of the fixed bracket at the coke oven door body as the control point, record the distance L1 between this control point and the top pressure block; set the distance L between this control point and the end of the spring plunger. target And the corresponding contact force F between the top pressure block and the end of the spring plunger. target The calculated movement distance of the top pressure block is L2 = L1 - L. target ;

[0026] 3) Activate the adjustment device. The top pressure block moves towards the end of the spring plunger and compresses the spring of the spring plunger until the distance between the top pressure block and the control point reaches L.target ;

[0027] During this period, data from the displacement detector and force sensor are continuously collected. When the force sensor data changes drastically, the top pressure block begins to contact the end of the spring plunger. The distance L3 that the top pressure block has moved at this time is recorded.

[0028] Calculate the change in position of the top pressure block and the corresponding change in force during the movement of the top pressure block from L3 to L2, and then derive the spring constant of the spring on the spring plunger; the spring constant k = ΔF / Δx.

[0029] Where k is the spring constant, ΔF is the change in spring force, and Δx is the change in spring length within the spring force change ΔF stage.

[0030] During the L3 to L2 stage, the top pressure block is in close contact with the end of the spring plunger, and the change in the position of the top pressure block is equal to the change in the length of the spring.

[0031] 4) Tighten or loosen the spring plunger nut until the contact force between the pressure block and the end of the spring plunger, as indicated by the force sensor, reaches the set value F. target ;

[0032] 5) Move the top pressure block to disengage it from the end of the spring plunger rod;

[0033] 6) Repeat steps 1 to 5) to adjust and test the spring plungers on the coke oven door body in sequence, adjust the output force of different spring plungers to the same range, and obtain the elastic coefficient of each spring plunger.

[0034] Preferably, in step 2), the distance L1 between the control point and the top pressure block is determined by the mechanical structure physical dimensions of the fixed bracket, fixed seat, transmission device, fixed seat, and top pressure block, as well as the displacement value of the push rod measured by the displacement detector.

[0035] Preferably, in step 2), there are two methods for calculating the moving distance L2 of the top pressing block:

[0036] Method 1: Use a distance sensor to measure the distance L1 between the control point of the furnace door body and the top pressure block. L2 = L1 - L target ;

[0037] Method 2: Install the top pressure block on a mechanical structure. One end of the mechanical structure is fixed to the furnace door body, and the other end is fixed to the top pressure block. L2 is determined by the physical dimensional relationship of the mechanical structure.

[0038] In the calibration method described in this invention:

[0039] In step 1), one end of the fixed bracket of the adjustment device is placed on the coke oven door body on the side of a certain spring plunger, and the top pressure block is placed below the end of the spring plunger; in the initial state of the adjustment device, the top pressure block and the spring plunger rod are not in contact.

[0040] In step 2), the control point A is set at one end of the fixed bracket at the coke oven door body, and the distance L1 between the control point A and the top pressure block is recorded. When the adjustment device is in its initial state, L1 can be obtained by integrating the mechanical dimensions of the fixed bracket, push rod, transmission device, fixed seat, and top pressure block. Alternatively, the adjustment device can be controlled to its initial state, and the distance between the control point A and the top pressure block can be directly measured using an external displacement measuring instrument, such as a ruler or laser rangefinder. After obtaining the value of L1, the value remains unchanged unless the control point A changes or the initial state of the adjustment device changes.

[0041] Set the distance L between control point A and the end of the spring plunger. target And the corresponding contact force F between the top pressure block and the end of the spring plunger. target .

[0042] L target The numerical value, near the reference value, is manually set based on specific operating conditions and input into the controller. The reference value is the distance between the furnace door control point A and the spring plunger rod when the furnace door is in normal use. This value can be obtained directly using external displacement measuring instruments, such as a ruler or laser rangefinder.

[0043] F target The numerical value, near the baseline reference value, is manually set based on specific operating conditions and input into the controller. The baseline reference value is the pressure value of the spring plunger rod when the furnace door is in normal use. It can be obtained according to the furnace door's factory design specifications or directly measured using an external force measuring instrument.

[0044] The calculated moving distance of the top pressure block is L2 = L1 - L target L2 is the control quantity of the calibration device controller.

[0045] In step 3), the adjustment device is activated, the pressure block moves towards the end of the spring plunger 1, and compresses the spring of the spring plunger until the distance between the pressure block and the control point A reaches L. target .

[0046] During this period, data from the displacement detector and force sensor are continuously collected. When the force sensor data changes drastically, the top pressure block begins to contact the end of the spring plunger. The distance L3 that the top pressure block has moved at this time is recorded.

[0047] During the movement of the pressure block from L3 to L2, the pressure block is in close contact with the spring plunger rod. The relative movement distance of the pressure block is the spring compression, and the force sensor reading is the force generated by the spring compression. Calculating the change in the pressure block position and the corresponding change in force during this stage yields:

[0048] The spring constant of the spring on the spring plunger = change in force / change in position.

[0049] In step 4), since the aforementioned process only controls the displacement of the adjustment device, the contact force between the top pressure block and the end of the spring plunger may not necessarily reach F when the moving distance L2 is reached. target。 If the contact force value is less than F target Tighten the spring plunger nut with a wrench; during this process, the motor of the adjustment device needs to increase its current output. If the contact force value is greater than F... target Loosen the spring plunger nut with a wrench, during which the motor of the adjustment device needs to reduce its current output. Maintain the distance between control point A and the end of the spring plunger at L throughout. target ; until the contact force between the top pressure block and the end of the spring plunger, as fed back by the force sensor, reaches the set value F. target .

[0050] In step 5), move the top pressure block to disengage it from the end of the spring plunger rod.

[0051] In step 6), repeat steps 1 to 5) to adjust and test multiple spring plungers on the coke oven door body in sequence, adjust the output force of different spring plungers to the same range to meet the working performance requirements of the oven door; and obtain the elastic coefficient of each spring plunger spring to provide data support for subsequent analysis of spring plunger spring life and predictive maintenance.

[0052] The adjustment device described in this invention can compress the spring plunger in a straight line and realize both position control and direct force control modes. It can also quantitatively evaluate the spring elastic coefficient and degradation during the spring compression process. By manually tightening or loosening the plunger nut using a screw tightening tool and the value fed back by the force sensor, the pressure of the spring plunger on the blade web is adjusted to the specified range.

[0053] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0054] This invention reduces the workload of manual adjustments and the occurrence of smoke leakage from the furnace door, resulting in significant environmental benefits.

[0055] This invention directly collects the force at the end of the spring plunger by using a force sensor at the end of the push rod, instead of indirectly determining the force at the end of the spring plunger by the torque when tightening the spring plunger nut, which is more accurate and precise. After calibration, the pressure of each spring plunger on the blade edge web of the furnace door is more consistent.

[0056] This invention can quantify spring degeneration data that was previously impossible to measure manually, and because it directly collects the force at the end of the spring plunger, the accuracy of spring elastic coefficient measurement is higher, which is beneficial for the refined management of furnace doors. Attached Figure Description

[0057] Figure 1 This is a perspective view of the usage state of an embodiment of the calibration device described in this invention;

[0058] Figure 2 for Figure 1 Enlarged schematic diagram of part A;

[0059] Figure 3 A three-dimensional embodiment of the calibration device described in this invention. Figure 1 ;

[0060] Figure 4 A three-dimensional embodiment of the calibration device described in this invention. Figure 2 ;

[0061] Figure 5 This is a front view of an embodiment of the calibration device described in this invention;

[0062] Figure 6 This is a schematic diagram of the calibration method described in this invention. Detailed Implementation

[0063] See Figures 1-5 The device for adjusting the spring plunger of a coke oven door according to the present invention comprises:

[0064] The fixed bracket 1 has one end resting on the coke oven door body 100 on the side of the spring plunger; a fixed block 13 protrudes from the other end of the fixed bracket 1.

[0065] Calibration mechanism 2 includes:

[0066] Fixture 21;

[0067] The motor and reducer 22 are mounted on the fixed base 21, with the output end of the reducer pointing vertically upward.

[0068] Transmission device 23 is located at the output end of the reducer 22;

[0069] Push rod 24 is located at the output end of the transmission device 23, and the end of push rod 24 is connected to the fixing block 13 of the fixing bracket 1;

[0070] The top pressure block 25 has one end connected to the fixed seat 21 and the other end located on one side of the coke oven door body 100, in contact with the lower end of the plunger rod 201 of the spring plunger 200.

[0071] Displacement detector, installed at the output end of motor or reducer, or at the output end of transmission device;

[0072] A force sensor is located at the end of the push rod 24;

[0073] The controller, the motor, the displacement detector, and the force sensor are electrically connected to the controller;

[0074] Preferably, the transmission device is a worm gear or rack and pinion structure.

[0075] Preferably, the fixing bracket 1 includes: a base plate 11, a fixing plate 12 formed by bending upward from the rear end of the base plate 11, a fixing block 13 provided in the center of the outer side of the fixing plate 12; at least one inverted U-shaped support part 14 formed by bending from the front end of the base plate 11 and being able to overlap the coke oven door body 100; and a groove or through hole 111 provided in the center of the base plate 11 for the spring plunger 200 to pass through.

[0076] Preferably, two inverted U-shaped support portions 14 are symmetrically arranged at the front end of the substrate 11.

[0077] Preferably, the displacement detector is an encoder, which is coaxially mounted at the output end of the motor or reducer.

[0078] Preferably, the displacement detector is a displacement sensor, installed on a fixed base or top pressure block, to measure the distance to the fixed support; or installed on a fixed support to measure the distance to the fixed base or top pressure block.

[0079] The force sensor is located at the end of the push rod 24. When the pressure block 25 is not in contact with the plunger rod 201 of the spring plunger 200, the force sensor data remains unchanged; when the pressure block 25 initially contacts the plunger rod 201 of the spring plunger 200, the force sensor value changes significantly, thus allowing the determination of the initial contact state; when the pressure block 25 is in close contact with the plunger rod 201 of the spring plunger 200, the force sensor value represents the force generated by the compression of the spring.

[0080] See Figures 1-6 The calibration method described in this invention includes the following steps:

[0081] 1) Place one end of the fixed bracket 1 of the adjustment device on the coke oven door body 100 on the side of a certain spring plunger 200, and place the top pressure block 25 below the end of the spring plunger 200; in the initial state of the adjustment device, the top pressure block 25 is not in contact with the plunger rod 201 of the spring plunger 200.

[0082] 2) Take the fixed bracket 1 at one end of the coke oven door body 100 as control point A, and record the distance L1 between control point A and the top pressure block 25; set the distance L between control point A and the end of the spring plunger 200. target And the corresponding contact force F between the top pressure block 25 and the end of the spring plunger 200. targetThe calculated movement distance of the top pressure block 25 is L2 = L1 -

[0083] L target ;

[0084] 3) Activate the adjustment device. The top pressure block 25 moves towards the end of the spring plunger 1 and compresses the spring of the spring plunger 200 until the distance between the top pressure block 25 and the control point A reaches L. target ;

[0085] During this period, data from the displacement detector and force sensor are continuously collected. When the force sensor data changes drastically, the top pressure block and the end of the spring plunger begin to contact. At this time, the distance L3 that the top pressure block 25 has moved is recorded.

[0086] During the movement of the top pressure block 25 from L3 to L2, the top pressure block 25 is in close contact with the plunger rod 201 of the spring plunger 200. The relative movement distance of the top pressure block 25 is the spring compression amount, and the force sensor value is the force generated by the spring compression. By calculating the position change of the top pressure block 25 and the corresponding force change during this stage, the elastic coefficient of the spring on the spring plunger 200 can be obtained (elastic coefficient of the spring on the spring plunger 200 = force change / position change).

[0087] 4) Tighten or loosen the spring plunger nut using a 300mm wrench until the contact force between the pressure block 25 and the end of the spring plunger, as indicated by the force sensor, reaches the set value F. target ;

[0088] 5) Move the top pressure block 25 to disengage it from the end of the spring plunger rod;

[0089] 6) Repeat steps 1 to 5) to adjust and test the multiple spring plungers on the coke oven door body in sequence, adjust the output force of different spring plungers to the same range, and obtain the elastic coefficient of each spring plunger.

Claims

1. A calibration device for adjusting the spring plunger of a coke oven door, characterized in that, include: A fixed bracket, one end of which is attached to the coke oven door body on the side of the spring plunger; A fixing block protrudes from the other end of the fixed bracket; Calibration agencies include: Fixed base; The motor and reducer are mounted on the fixed base, with the output end of the reducer pointing vertically upwards. The transmission device is located at the output end of the reducer; A push rod is provided at the output end of the transmission device, and the end of the push rod is connected to the fixing block of the fixed bracket; The top pressure block has one end connected to the fixed seat and the other end located on one side of the coke oven door body, in contact with the lower end of the spring plunger rod; Displacement detector, installed at the output end of motor or reducer, or at the output end of transmission device; A force sensor is located at the end of the push rod; The controller is electrically connected to the motor, displacement detector, and force sensor.

2. The adjustment device for adjusting the spring plunger of a coke oven door as described in claim 1, characterized in that, The transmission device is a worm gear or rack and pinion structure.

3. The adjustment device for adjusting the spring plunger of a coke oven door as described in claim 1, characterized in that, The displacement detector is an encoder, which is coaxially mounted at the output end of the motor or reducer.

4. The adjustment device for adjusting the spring plunger of a coke oven door as described in claim 1, characterized in that, The displacement detector is a displacement sensor, installed on a fixed base or top pressure block, to measure the distance to the fixed support; or installed on a fixed support to measure the distance to the fixed base or top pressure block.

5. The adjustment device for adjusting the spring plunger of a coke oven door as described in claim 1, characterized in that, The fixed bracket includes: a base plate; a fixing plate formed by bending upward from the rear end of the base plate, with a fixing block provided in the center of the outer side of the fixing plate; at least one inverted U-shaped support part formed by bending from the front end of the base plate, which can be attached to the coke oven door body; and a groove or through hole provided in the center of the base plate for the spring plunger to pass through.

6. The adjustment device for adjusting the spring plunger of a coke oven door as described in claim 5, characterized in that, Two inverted U-shaped support portions are symmetrically arranged at the front end of the substrate.

7. The adjustment method for the coke oven door spring plunger adjustment device as described in claim 1, characterized in that, Includes the following steps: 1) Place one end of the fixed bracket of the adjustment device on the coke oven door body on the side of a certain spring plunger, and place the top pressure block below the end of the spring plunger; 2) Using one end of the fixed bracket at the coke oven door body as the control point, record the distance L1 between this control point and the top pressure block; set the distance L between this control point and the end of the spring plunger. target And the corresponding contact force F between the top pressure block and the end of the spring plunger. target The calculated movement distance of the top pressure block is L2 = L1 - L. target ; 3) Activate the adjustment device. The top pressure block moves towards the end of the spring plunger and compresses the spring of the spring plunger until the distance between the top pressure block and the control point reaches L. target During this period, the moving distance L2 of the top pressing block is obtained; During this period, data from the displacement detector and force sensor are continuously collected. When the force sensor data changes drastically, the top block and the end of the spring plunger will begin to contact. At this time, the distance L3 that the top block has moved is recorded. Calculate the change in position of the top pressure block and the corresponding change in force during the movement of the top pressure block from L3 to L2, and then derive the spring constant of the spring on the spring plunger; the spring constant k = ΔF / Δx. Where k is the spring constant, ΔF is the change in spring force, and Δx is the change in spring length within the spring force change ΔF stage. During the L3 to L2 stage, the top pressure block is in close contact with the end of the spring plunger, and the change in the position of the top pressure block is equal to the change in the length of the spring. 4) Tighten or loosen the spring plunger nut until the contact force between the pressure block and the end of the spring plunger, as indicated by the force sensor, reaches the set value F. target ; 5) Move the top pressure block to disengage it from the end of the spring plunger rod; 6) Repeat steps 1) to 5) to adjust and test the spring plungers on the coke oven door body in sequence, adjust the output force of different spring plungers to the same range, and obtain the elastic coefficient of the spring on each spring plunger.

8. The adjustment method for the coke oven door spring plunger adjustment device as described in claim 7, characterized in that, In step 2), the distance L1 between the control point and the top pressure block is determined by the mechanical structure physical dimensions of the fixed bracket, fixed seat, transmission device, fixed seat, and top pressure block, as well as the displacement value of the push rod measured by the displacement detector.

9. The adjustment method for the coke oven door spring plunger adjustment device as described in claim 7 or 8, characterized in that, In step 2), there are two methods for calculating the moving distance L2 of the top pressure block: Method 1: Use a distance sensor to measure the distance L1 between the control point of the furnace door body and the top pressure block. L2 = L1 - L target ; Method 2: Install the top pressure block on a mechanical structure. One end of the mechanical structure is fixed to the furnace door body, and the other end is fixed to the top pressure block. L2 is determined by the physical dimensional relationship of the mechanical structure.

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