Monitoring device for swell capacity of melting furnace

Abstract

The utility model relates to the field of liquid crystal substrate glass production, in particular to a melting furnace swelling capacity monitoring device which comprises a constraint frame, a measuring device and a cooling device, the measuring device comprises an expansion spring, a ring-type pressure sensor and a distance measuring sensor, the ring-type pressure sensor is used for monitoring real-time pressure borne by the expansion spring, the distance measuring sensor is used for measuring the compression amount of the expansion spring so as to monitor the expansion amount of the melting furnace body, and through a double-effect guarantee mechanism of the ring-type pressure sensor and the distance measuring sensor, the expansion amount of the melting furnace body is measured. The swell capacity of the furnace body of the melting furnace is monitored in real time, the accuracy of monitoring data is maintained, and the risk that the furnace body of the melting furnace is damaged due to serious temperature rise deformation is avoided. The cooling device is arranged outside the measuring device and used for cooling the measuring device, it is guaranteed that the measuring device carries out monitoring work in a normal working temperature environment, inaccurate measurement or failure caused by temperature rise of the measuring device is avoided, abnormal swelling amount leak detection caused by monitoring interruption is effectively prevented, and damage to the kiln body structure is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid crystal substrate glass production technical field, specifically relate to a kind of expansion monitoring device of melting furnace. BACKGROUND

[0002] In the process of melting liquid crystal substrate glass, high-temperature melting furnace is the core part in production process, and its perfect state is directly related to glass quality. New melting furnace must be heated when it is used to prevent the volume change of melting furnace itself due to thermal expansion; and if this change cannot be properly controlled, it will lead to the damage of the structure of melting furnace, material damage or performance degradation. In the traditional heating process, the expansion of melting furnace is mainly measured by artificial measurement or based on production experience, and this method has the problems of misjudgment or inaccurate measurement.

[0003] To this end, the prior art mentions using displacement sensor device to detect the expansion of melting furnace, by setting displacement sensor and expansion spring outside the melting furnace, as the temperature rises, the melting furnace body gradually expands, the expansion spring is gradually compressed, the displacement sensor is used to detect the compression of expansion spring, and then the expansion of melting furnace is detected, reducing the risk of inaccurate manual detection.

[0004] However, in the process of heating, the temperature of melting furnace body gradually rises from room temperature to above 1600 DEG C; because the expansion spring and displacement sensor are close to the melting furnace body, their temperature will also gradually rise from room temperature to above 200 DEG C under the influence of heat radiation. At this temperature, the elastic coefficient of the expansion spring will change, resulting in a change in the pressure corresponding to the same compression of the expansion spring, so in this case, detecting the expansion of melting furnace by measuring the compression of the expansion spring will result in inaccurate detection results; as for the displacement sensor, it is generally required to work in an environment below 100 DEG C, but as the temperature of the melting furnace body rises, the temperature of the displacement sensor exceeds 100 DEG C, at this time, the measurement accuracy of the displacement sensor is obviously reduced, and the data often jumps abnormally, and even the displacement sensor may be damaged, thereby greatly reducing the accuracy of monitoring the expansion of the melting furnace body, and in severe cases, the detection device cannot work normally, causing the performance of the melting furnace to decrease or even be damaged.

[0005] From the above, it is important to design a device that can accurately monitor the expansion of the melting furnace body in the heating environment of the melting furnace. UTILITY MODEL CONTENTS

[0006] The utility model wants to solve the technical problem to provide a kind of monitoring device of expansion quantity of melting furnace, through the double-effect safeguard mechanism of ring pressure sensor and range sensor, real-time monitoring melting furnace body expansion quantity, both maintain the precision of monitoring data, also avoid the damage risk of melting furnace body caused by temperature rise deformation seriously;Cooling device is arranged outside measuring device, for the cooling of measuring device, guarantee that measuring device carries out monitoring work in normal working temperature environment, avoid the inaccurate measurement or malfunction of measuring device due to temperature rise, effectively prevent the abnormal expansion quantity missed detection caused by monitoring interruption, prevent kiln body structure damage.

[0007] The utility model relates to a kind of monitoring device of expansion quantity of melting furnace, it is arranged at the outside of melting furnace body, including restraint frame, measuring device and cooling device;

[0008] The restraint frame includes at least a pair of vertical arrangement in melting furnace body opposite two side faces column and horizontally arranged pull rod, the pull rod is connected between a pair of column and the end of pull rod penetrates column;

[0009] The measuring device includes expansion spring, ring pressure sensor and range sensor;Wherein,

[0010] The expansion spring is sleeved in the end of pull rod, and is placed in the outside of column;

[0011] The ring pressure sensor is fixed on pull rod and coaxial with pull rod, and the ring pressure sensor is placed in the outside of expansion spring;

[0012] The range sensor is fixed on gasket, and the gasket is sleeved on the pull rod between expansion spring and ring pressure sensor;

[0013] The cooling device is hollow sleeve body, installed on the pull rod, and the ring pressure sensor and range sensor are arranged in the inside of cooling device.

[0014] The measuring device further includes infrared thermal imaging camera, at least a group, is arranged in the measuring device and melting furnace body surface.

[0015] Further including adjusting device, the adjusting device includes gear adjusting nut, is placed in the outside of ring pressure sensor and abuts with ring pressure sensor, the gear adjusting nut is internally provided with thread, the end of pull rod is provided with matching thread, and the gear adjusting nut is screwed with pull rod.

[0016] The adjusting device further includes servo motor and driving gear, the servo motor is fixed on the upper end of gasket by support, the driving gear is installed on the output shaft of servo motor, and the driving gear is engaged with the outside of gear adjusting nut.

[0017] The cooling device is provided with a sandwich layer, and a fluid hose is communicated with the sandwich layer, and a flow regulating valve is arranged on the fluid hose.

[0018] The cooling device is provided with a temperature sensor.

[0019] The distance measuring sensor includes but is not limited to a laser distance measuring sensor or a displacement sensor.

[0020] The distance measuring sensor is fixed to the lower end of the gasket through the universal support.

[0021] The universal support is provided with a distance measuring reserved hole.

[0022] The cooling device is provided with a reserved hole.

[0023] The beneficial effects of the present utility model are as follows: the monitoring device for the expansion amount of the furnace includes a constraint frame, a measuring device and a cooling device; the measuring device is installed on the constraint frame, the measuring device includes an expansion spring, a ring type pressure sensor and a distance measuring sensor, the real-time pressure borne by the expansion spring is monitored through the ring type pressure sensor, the compression amount of the expansion spring is measured through the distance measuring sensor, so as to monitor the expansion amount of the furnace body, the double-effect guarantee mechanism of the ring type pressure sensor and the distance measuring sensor is used to monitor the expansion amount of the furnace body in real time, the accuracy of the monitoring data is maintained, and the risk of damage of the furnace body caused by serious temperature rise deformation is avoided. The cooling device is arranged outside the measuring device to cool the measuring device, so that the measuring device can work in a normal working temperature environment, the inaccuracy or failure of the measuring device caused by temperature rise is avoided, abnormal expansion amount missed detection caused by monitoring interruption is effectively prevented, and the structure of the furnace body is prevented from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0024] ATTACHMENT Fig. 1 It is a whole structure schematic view of the present utility model;

[0025] ATTACHMENT Fig. 2 It is an installation schematic view of the monitoring device and the cooling device in the constraint frame of the present utility model;

[0026] ATTACHMENT Fig. 3 It is a specific structure schematic view of the measuring device and the adjusting device of the present utility model;

[0027] ATTACHMENT Fig. 4 It is a cooling cover structure schematic view of the present utility model.

[0028] In the figure, 101, the furnace body of the melting furnace; 102, the burner; 103, the electrode brick; 104, the charging port; 105, the flue port; 106, the column; 107, the pull rod; 1071, the longitudinal pull rod; 1072, the transverse pull rod; 201, the expansion spring; 202, the ring type pressure sensor; 203, the distance measuring sensor; 204, the gasket; 205, the universal support; 206, the infrared thermal imaging camera; 301, the servo motor; 302, the driving gear; 303, the gear adjusting nut; 401, the cooling device; 402, the fluid hose; 403, the flow regulating valve; 404, the reserved hole; 405, the distance measuring reserved hole; 406, the temperature sensor. DETAILED DESCRIPTION

[0029] Referring to the drawings Figs. 1 to 4 The monitoring device for the expansion amount of the melting furnace is arranged outside the furnace body 101 of the melting furnace, comprising a constraint frame, a measuring device and a cooling device 401; wherein,

[0030] The constraint frame comprises at least one pair of columns 106 vertically arranged on opposite sides of the furnace body 101 of the melting furnace and a pull rod 107 horizontally arranged, the pull rod 107 is connected between the pair of columns 106 and the end of the pull rod 107 penetrates the column 106;

[0031] The measuring device comprises an expansion spring 201, a ring type pressure sensor 202 and a distance measuring sensor 203; wherein,

[0032] The expansion spring 201 is sleeved on the end of the pull rod 107 and is arranged outside the column 106;

[0033] The ring type pressure sensor 202 is fixed on the pull rod 107 and is coaxial with the pull rod 107, and the ring type pressure sensor 202 is arranged outside the expansion spring 201;

[0034] The distance measuring sensor 203 is fixed on the gasket 204, and the gasket 204 is sleeved on the pull rod 107 between the expansion spring 201 and the ring type pressure sensor 202;

[0035] The cooling device 401 is a hollow sleeve body, which is installed on the pull rod 107, and the ring type pressure sensor 202 and the distance measuring sensor 203 are arranged inside the cooling device 401.

[0036] In the present embodiment, the furnace body 101 is constructed by refractory material. According to the structure of the furnace body 101 and the characteristic parameters of the refractory material, including but not limited to the coefficient of thermal expansion and the compressive strength, the expansion amount of the refractory material in each heating stage is calculated, and appropriate gaps are reserved outside the furnace body 101 during installation of the furnace body 101 for installation of the expansion amount monitoring device of the present furnace. The expansion amount monitoring device of the present furnace includes a constraint frame, a measuring device and a cooling device 401; the measuring device is installed on the constraint frame, and the measuring device includes an expansion spring 201, a ring-type pressure sensor 202 and a distance measuring sensor 203. The real-time pressure on the expansion spring 201 is monitored through the ring-type pressure sensor 202, and the compression amount of the expansion spring 201 is measured through the distance measuring sensor 203 to monitor the expansion amount of the furnace body 101. Through the double-effect guarantee mechanism of the ring-type pressure sensor 202 and the distance measuring sensor 203, the expansion amount of the furnace body 101 is monitored in real time, which not only maintains the accuracy of the monitoring data, but also avoids the risk of damage to the furnace body 101 caused by severe temperature rise deformation. The cooling device 401 is arranged outside the measuring device to cool the measuring device, so that the measuring device can work in a normal temperature environment, avoiding inaccurate measurement or failure of the measuring device due to temperature rise, effectively preventing abnormal expansion amount from being missed due to monitoring interruption, and preventing damage to the furnace body structure.

[0037] The melting furnace body 101 is a square structure, at least one burner 102 and electrode brick 103 are arranged on the longitudinal side, and at least one charging port 104 and flue port 105 are arranged on the transverse side. The melting furnace body 101 is externally provided with a constraint frame, which is a ring-shaped frame for limiting and constraining the melting furnace body 101; the length change value of the pull rod 107 in the constraint frame can reflect the expansion amount along the melting furnace body 101. The constraint frame comprises at least one pair of vertical columns 106 arranged on opposite sides of the melting furnace body 101 and a horizontal pull rod 107 connected between the pair of vertical columns 106 and penetrating the vertical columns 106 at the ends; the vertical column 106 is preferably a steel column 106, which is made of H-shaped steel, and the bottom of the vertical column 106 is provided with an adjustable foot bolt; the pull rod 107 is made of an alloy steel rod with a diameter of 50-80 mm. In a specific embodiment, vertical columns 106 are arranged along the outer vertical sides of the melting furnace body 101 in a circumferential direction, and each vertical side is provided with two vertical columns 106 connected to different pull rods 107. The pull rod 107 is arranged along the outer horizontal sides of the melting furnace body in a circumferential direction, and at least one pull rod 107 is arranged between any pair of vertical columns 106. Preferably, the pull rod 107 comprises a transverse pull rod 1072 and a longitudinal pull rod 1071, the transverse pull rod 1072 is arranged along the four transverse horizontal sides of the melting furnace body 101 in a circumferential direction, and the longitudinal pull rod 1071 is arranged along the four longitudinal horizontal sides of the melting furnace body 101 in a circumferential direction, any two transverse pull rods 1072 and any pair of vertical columns 106 form two groups of transverse plane frames, any two longitudinal pull rods 1071 and any pair of vertical columns 106 form two groups of longitudinal plane frames, and the two groups of transverse plane frames and the two groups of longitudinal plane frames jointly form a ring-shaped support structure to form the constraint frame, and the melting furnace body is fixed inside the constraint frame.

[0038] The measuring device comprises an expansion spring 201, a ring-type pressure sensor 202, a distance measuring sensor 203 and an infrared thermal imaging camera 206, wherein the expansion spring 201, the distance measuring sensor 203 and the pressure sensor are sequentially installed at the end of the pull rod 107 from inside to outside, and are arranged outside the vertical column 106.

[0039] The expansion spring 201 is sleeved on the end of the pull rod 107, one end of which is in contact with the outside of the vertical column 106, and the other end is in contact with the inside of the ring-type pressure sensor 202; both ends are provided with an earring or a plane grinding structure for fixed connection with the vertical column 106 and the ring-type pressure sensor 202, and the connection needs to meet the axial pre-tightening force transmission requirement.

[0040] The ring-type pressure sensor 202 is fixed on the pull rod 107 and coaxial with the pull rod 107, which records and monitors the pressure in real time, and then calculates the compression amount of the expansion spring 201.

[0041] The distance measuring sensor 203 is fixed to the gasket 204, which is sleeved on the pull rod 107 between the expansion spring 201 and the ring pressure sensor 202; in a specific embodiment, the distance measuring sensor 203 is fixed to the lower end of the gasket 204 through the universal support 205, and the universal support 205 is provided with a distance measuring reserved hole 405 for the light path of the distance measuring sensor 203. The distance measuring sensor 203 is used for monitoring the compression amount of the expansion spring 201, and further monitoring the expansion amount of the furnace body 101. Preferably, the distance measuring sensor 203 includes but is not limited to a laser distance measuring sensor 203 or a displacement sensor.

[0042] The infrared thermal imaging camera 206 is at least one set, which is arranged on the measuring device and the surface of the furnace body 101, and is used for monitoring the surface temperature of the furnace body 101. The infrared thermal imaging camera 206 is 2m-3m away from the monitoring point, and the infrared thermal imaging camera 206 is selected but not limited to the FLIR A65 series camera, the field of view angle is 60°x50°, and the thermal sensitivity is <0.03℃. In addition to comprehensively monitoring the temperature, the infrared thermal imaging camera 206 can capture the temperature distribution diagram of the surface of the furnace body 101, and can also timely find abnormal hot spot areas, and has a warning and protection function, including but not limited to local overheating or cooling fluid leakage. When there is an anomaly, it will be monitored in the process of its deterioration, and timely remediation and solution can be performed, which is used for abnormal situation warning and fault protection. The prior art does not disclose this function, which is generally easy to be found when it appears obvious abnormality, at which time irreversible damage to the structure of the furnace may have been caused, directly affecting the service life of the furnace. Preferably, three sets of infrared thermal imaging cameras 206 are adopted.

[0043] In the embodiment, the pressure, expansion amount and temperature data collected by the ring pressure sensor 202, the distance measuring sensor 203 and the infrared thermal imaging camera 206 are compared and analyzed with preset parameter values (the preset parameter values include but are not limited to design parameters and / or experience parameters); if the monitored data all fall within the preset parameter value range, an analysis result of continuing to heat is given; if at least one of the monitored data exceeds the preset parameter value range, an analysis of adjusting the length of the expansion spring 201 and / or the heating process parameter is given. The monitoring result of the detection device can also be analyzed in combination with the internal temperature of the furnace body 101.

[0044] The cooling device 401 is arranged on the pull rod 107, and the ring type pressure sensor 202 and the distance measuring sensor 203 are arranged inside the cooling device 401. Specifically, the cooling device 401 has a reserved hole 404 matched with the ring type pressure sensor and the distance measuring sensor 203, and by arranging the cooling device 401, the ring type pressure sensor 202 and the distance measuring sensor 203 can work in an ideal environment temperature, so that even if the furnace body 101 of the melting furnace is in a high temperature environment, the ring type pressure sensor 202 and the distance measuring sensor 203 can still accurately measure the compression amount of the expansion spring 201, and then indirectly and accurately determine the expansion amount of the refractory material of the furnace body 101 of the melting furnace.

[0045] The cooling device 401 is provided with a sandwich layer, and a fluid hose 402 is communicated with the sandwich layer. The fluid hose 402 is provided with a flow regulating valve 403. By opening and closing the flow regulating valve 403, the refrigeration temperature of the cooling device 401 can be controlled. The surface of the cooling device 401 is provided with a temperature sensor 406 for detecting the temperature of the working environment around the detection device.

[0046] The expansion amount monitoring device of the melting furnace further comprises an adjusting device, and the adjusting device comprises a gear adjusting nut 303, a servo motor 301 and a driving gear 302. The gear adjusting nut 303 is arranged outside the ring type pressure sensor 202 and abuts against the ring type pressure sensor 202. The gear adjusting nut 303 is internally provided with a thread, and the end of the pull rod 107 is provided with a thread matched with the thread of the gear adjusting nut 303, and the gear adjusting nut 303 is screwed with the pull rod 107. The servo motor 301 is fixed on the upper end of the gasket 204 through a support, and the driving gear 302 is installed on the output shaft of the servo motor 301. The driving gear 302 is externally engaged with the gear adjusting nut 303. The tension of the pull rod 107 can be adjusted by manually rotating the gear adjusting nut 303, or the servo motor 301 is connected with a computer, and the tension of the pull rod 107 is adjusted by manually controlling the computer to control the operation of the servo motor 301. The tension of the pull rod 107 is adjusted to control the pressure applied to the furnace body 101 of the melting furnace. In a specific embodiment, in the low temperature stage (temperature range: 400-800℃), the furnace body 101 of the melting furnace is compressed and adjusted, and the pressure applied to the furnace body 101 of the melting furnace is increased to 0.8Mpa; in the medium temperature stage (temperature range: 800-1200℃), the furnace body 101 of the melting furnace is slowly and quantitatively released, and the pressure applied to the furnace body 101 of the melting furnace is 0.6Mpa; in the high temperature stage (temperature range: 1200-1500℃), the furnace body 101 of the melting furnace is released with greater intensity, and the pressure applied to the furnace body 101 of the melting furnace is 0.4Mpa; after the temperature rising ends, the refractory material is compressed and adjusted again to keep the structure of the furnace body 101 of the melting furnace stable, and the pressure applied to the furnace body 101 of the melting furnace is 0.2Mpa.

[0047] Those skilled in the art should understand that the above discussion of any embodiment is only intended to be illustrative and is not intended to be limiting to the scope of the present application; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes to different aspects of one or more embodiments of the present application as described above, which are not provided in details for the sake of brevity.

[0048] One or more embodiments of the present application are intended to cover all such alternatives, modifications, and variations as falling within the broad scope of the application. Accordingly, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of the present application should be included in the scope of the present application.

Claims

1. A monitoring device for the expansion of a melting furnace, installed outside the furnace body (101), characterized in that, Includes a constraint frame, a measuring device, and a cooling device (401); The constraint frame includes at least one pair of vertically arranged columns (106) on opposite sides of the furnace body (101) and horizontally arranged tie rods (107), the tie rods (107) being connected between the pair of columns and the ends of the tie rods (107) penetrating the columns (106). The measuring device includes an expansion spring (201), a ring pressure sensor (202), and a distance sensor (203); wherein, The expansion spring (201) is fitted onto the end of the pull rod (107) and is positioned outside the column (106); The ring pressure sensor (202) is fixed on the pull rod (107) and coaxial with the pull rod (107), and the ring pressure sensor (202) is placed outside the expansion spring (201); The ranging sensor (203) is fixed to the pad (204), and the pad (204) is fitted onto the pull rod (107) between the expansion spring (201) and the ring pressure sensor (202); The cooling device (401) is a hollow sleeve, which is installed on the pull rod (107). The ring pressure sensor (202) and the distance sensor (203) are arranged inside the cooling device (401).

2. The furnace expansion monitoring device as described in claim 1, characterized in that, The measuring device also includes an infrared thermal imaging camera (206), at least one set, arranged on the surface of the measuring device and the furnace body (101).

3. The furnace expansion monitoring device as described in claim 1, characterized in that, It also includes an adjustment device, which includes a gear adjustment nut (303) placed outside the ring pressure sensor (202) and abutting against the ring pressure sensor. The gear adjustment nut (303) has internal threads, and the end of the pull rod (107) is provided with matching threads. The gear adjustment nut (303) is screwed to the pull rod.

4. The furnace expansion monitoring device as described in claim 3, characterized in that, The adjustment device also includes a servo motor (301) and a drive gear (302). The servo motor (301) is fixed to the upper end of the pad (204) by a bracket. The drive gear (302) is mounted on the output shaft of the servo motor (301) and meshes with the gear adjusting nut (303).

5. The furnace expansion monitoring device as described in claim 1, characterized in that, The cooling device (401) is provided with a jacket, and the jacket is connected to a fluid hose (402), on which a flow regulating valve (403) is provided.

6. The furnace expansion monitoring device as described in claim 1, characterized in that, The surface of the cooling device (401) is provided with a temperature sensor (406).

7. The furnace expansion monitoring device as described in claim 1, characterized in that, The ranging sensor (203) includes, but is not limited to, a laser ranging sensor or a displacement sensor.

8. The furnace expansion monitoring device as described in claim 1, characterized in that, The ranging sensor (203) is fixed to the lower end of the pad (204) by a universal bracket (205).

9. The furnace expansion monitoring device as described in claim 8, characterized in that, The universal bracket (205) has a distance measuring reserved hole (405).

10. The furnace expansion monitoring device as described in claim 1, characterized in that, The cooling device (401) has a reserved hole (404).

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