CN221028080U - Liquid level measuring device and electric melting furnace with same - Google Patents

Abstract

The utility model discloses a liquid level measuring device and an electric melting furnace with the same, wherein the liquid level measuring device comprises a probe and a probe sleeve, and is used for detecting the liquid level of glass liquid in the electric melting furnace, the probe sleeve and the probe are arranged in a gap and sleeved on the periphery of the probe, and the probe is provided with a probe head exposed out of the probe sleeve; one ends of the probe and the probe sleeve are respectively electrically connected with the detection equipment, and when the liquid level measuring device reaches the liquid level to be measured, the other ends of the probe and the probe sleeve are respectively contacted with the glass liquid, so that an electric loop is formed among the probe, the probe sleeve, the detection equipment and the glass liquid when the liquid level is detected. The utility model provides a liquid level measuring device, which solves the problem that the existing liquid level measuring device needs an external guide wire to be grounded for measuring the liquid level.

Description

Liquid level measuring device and electric melting furnace with same

Technical Field

The utility model relates to the technical field of melting furnace liquid level detection, in particular to a liquid level measuring device and an electric melting furnace with the same.

Background

At present, in the production of glass, the requirements on glass products are more and more strict, and the requirements on the liquid level of glass liquid in an electric melting furnace are also more and more high, so that the fluctuation and change of the liquid level of the glass liquid can directly influence the control on the production parameters, the feeding speed and the like of the electric melting furnace. Therefore, how to accurately detect the change of the glass level to be able to control the glass level to remain constant is critical to the production process of the electric melting furnace.

Because the internal environment temperature of the electric melting furnace is higher and is nearly 1600 ℃ in a high-temperature state, a liquid level meter with high-temperature resistance is needed, the liquid level to be detected of glass liquid can be timely and accurately reached in the electric melting furnace for detection, and a detected liquid level signal is transmitted to detection equipment.

Disclosure of utility model

The utility model mainly aims to provide a liquid level measuring device and an electric melting furnace with the same, and aims to solve the problem of timely and accurately measuring the liquid level of glass liquid in the high-temperature electrified electric melting furnace.

In order to achieve the above object, the liquid level measuring device provided by the utility model is used for detecting the liquid level of glass liquid in an electric melting furnace, and comprises:

A probe; and

The probe sleeve is arranged in a clearance with the probe and sleeved on the periphery of the probe, and the probe is provided with a probe head exposed out of the probe sleeve;

The probe and one end of the probe sleeve are respectively and electrically connected with the detection equipment, and when the liquid level measuring device reaches the liquid level to be measured, the other end of the probe and the other end of the probe sleeve are respectively contacted with the glass liquid, so that an electric loop is formed among the probe, the probe sleeve, the detection equipment and the glass liquid when the liquid level is detected.

Optionally, in an embodiment of the present utility model, a gap cavity is formed between the probe sleeve and the probe, the gap cavity is filled with the insulating filler to isolate the probe and the probe sleeve, and the gap cavity has two openings oppositely arranged along the axial direction of the probe; the liquid level measuring device further comprises a blocking block, wherein the blocking block is detachably arranged at the opening to open or block the opening.

Optionally, in an embodiment of the present utility model, the probe and the probe sleeve are of a platinum structure or a platinum-rhodium alloy structure; and/or, the filler is zirconia filler; and/or the plugging block is a zirconia plugging block.

Optionally, in an embodiment of the present utility model, the liquid level measurement device further includes a fixing component, where the fixing component is disposed at an end of the probe far from the probe, and the probe sleeve are fixedly connected with the fixing component.

Optionally, in an embodiment of the present utility model, the fixing assembly includes:

The fixing sleeve is arranged at one end of the probe far away from the probe, and the probe sleeve are connected with the fixing sleeve; and

And the fixing pipe is connected with the fixing sleeve through bolts and penetrates through the fixing sleeve and extends towards one side deviating from the probe.

Optionally, in an embodiment of the present utility model, a wire is further disposed in the fixing component, one end of the wire is electrically connected to the detecting device, the other end of the wire penetrates through the fixing tube and the fixing sleeve to be electrically connected to the probe and the probe sleeve, and the probe sleeve are both electrically connected to at least one wire.

Optionally, in an embodiment of the present utility model, the fixing assembly further includes a baffle, where the baffle is disposed at an end of the fixing tube away from the fixing sleeve, and the wire penetrates the baffle to be connected with the detecting device.

In order to achieve the above object, the present utility model further provides an electric melting furnace with a liquid level measuring device, comprising:

the melting furnace comprises a melting furnace body, wherein a melting cavity is formed in the melting furnace body, conductive glass liquid is filled in the melting cavity, and a detection port communicated with the melting cavity is formed in the melting furnace body; and

The liquid level measuring device according to any one of the above technical solutions, wherein the liquid level measuring device is slidably disposed at the detection port, so that the probe and the probe sleeve are abutted against the liquid level of the glass liquid.

Optionally, in an embodiment of the present utility model, the electric melting furnace with the liquid level measuring device further includes a linear driving mechanism, the linear driving mechanism is disposed outside the melting furnace body, and the linear driving mechanism is in driving connection with the liquid level measuring device, so as to drive the liquid level measuring device to slide along the detection port.

Alternatively, in an embodiment of the present utility model, the linear driving mechanism is electrically connected to the detecting device, and the detecting device controls the linear driving mechanism.

Optionally, in an embodiment of the present utility model, the linear driving mechanism includes:

The driving motor is fixed outside the melting furnace body; and

The screw rod is arranged on one side of the driving motor and is connected with an output shaft of the driving motor, and the screw rod is in threaded connection with the liquid level measuring device so as to drive the liquid level measuring device to move along the axial direction of the screw rod.

Optionally, in an embodiment of the present utility model, the electric melting furnace with the liquid level measuring device further includes:

The fixed seat is arranged on one side of the detection port far away from the melting cavity, a sliding channel communicated with the detection port is arranged on the fixed seat, and the driving motor is fixed on the fixed seat; and

The sliding block is arranged on the fixed seat, the liquid level measuring device is fixed on the sliding block, and the screw rod is in threaded connection with the sliding block so as to drive the sliding block to slide along the sliding channel.

Compared with the prior art, in the technical scheme provided by the utility model, the probe and the probe sleeve sleeved on the periphery of the probe are used for detecting the liquid level of the glass liquid in the electric melting furnace, and a gap is reserved between the probe and the probe sleeve, so that when the glass liquid reaches the liquid level to be detected, an electric loop can be formed among a probe head of the probe, the probe sleeve, the detection equipment and the glass liquid due to the conductivity of the glass liquid, a detected liquid level electric signal is input for the detection equipment, and then the liquid level data can be obtained after the detection equipment processes the liquid level electric signal. Therefore, the glass liquid level to be measured can be timely and accurately reached to obtain liquid level data, the glass melting furnace is not required to be opened during detection, interference to the liquid level of the glass liquid is avoided, and accordingly accuracy of measurement results is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a liquid level measuring device according to the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a side view of the structure of an embodiment of the liquid level measuring device of the present utility model;

FIG. 4 is a schematic view of an embodiment of the electric melting furnace with a liquid level measuring device according to the present utility model.

Reference numerals illustrate:

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Because the internal environment temperature of the electric melting furnace is higher and is nearly 1600 ℃ in a high-temperature state, a liquid level meter with high-temperature resistance is needed, the liquid level to be detected of glass liquid can be timely and accurately reached in the electric melting furnace for detection, and a detected liquid level signal is transmitted to detection equipment.

Based on the above, the utility model provides a liquid level measuring device, in the scheme, a gap is arranged between a probe and a probe sleeve, one ends of the probe and the probe sleeve are electrically connected with a detection device, and an electric loop can be formed among the probe, the probe sleeve, the detection device and the glass liquid during detection by utilizing the conductivity of the glass liquid, so that the detection of the liquid level is smoothly completed.

As shown in fig. 1 to 4, the liquid level measuring apparatus 100 includes:

a probe 110; and

A probe cover 120 disposed in a gap with the probe 110 and sleeved on the outer circumference of the probe 110, the probe 110 having a probe head 111 exposed to the probe cover 120;

wherein, one end of the probe 110 and one end of the probe sleeve 120 are respectively electrically connected with the detection device, and when the liquid level measuring device reaches the liquid level to be measured, the other end of the probe 110 and the other end of the probe sleeve 120 are respectively contacted with the glass liquid, so that an electric loop is formed among the probe 110, the probe sleeve 120, the detection device and the glass liquid when the liquid level is detected.

In the technical scheme adopted in this embodiment, the probe 110 and the probe sleeve 120 sleeved on the periphery of the probe 110 are used for detecting the liquid level of the glass liquid in the electric melting furnace, and a gap is formed between the probe 110 and the probe sleeve 120, so that when the glass liquid reaches the liquid level to be detected, an electric loop can be formed among the probe 111 of the probe 110, the probe sleeve 120, the detection equipment and the glass liquid due to the conductivity of the glass liquid, a detected liquid level signal is input for the detection equipment, and then the liquid level data can be obtained after the detection equipment processes the liquid level signal. Therefore, the glass liquid level to be measured can be timely and accurately reached to obtain liquid level data, the glass melting furnace is not required to be opened during detection, interference to the liquid level of the glass liquid is avoided, and accordingly accuracy of measurement results is improved.

Specifically, the shapes of the probe 110 and the probe cover 120 are not particularly limited in this embodiment, and may be, for example, cylindrical, square, or the like, so long as the probe cover 120 and the probe 110 can be independently provided or a gap can be formed, and the materials of the probe 110 and the probe cover 120 are not particularly limited in this embodiment, and are generally conductive high-temperature alloy materials.

Specifically, an electrical loop may be formed between the probe 110, the probe sleeve 120, the detection device and the molten glass, and a detected liquid level signal is input to the detection device, where the liquid level signal is not specifically limited.

Alternatively, the length of the probe cover 120 is shorter than the length of the probe 110, and may be, for example, 50-100 mm shorter; in this way, the probe 111 of the probe 110 may be partially exposed to the probe sleeve 120, so that the probe 111 of the probe 110 is contacted with the liquid surface of the glass liquid, and the voltage signal of the glass liquid is fed back to the detection device in advance through the probe 110; preferably, the length of the probe 110 and the probe cover 120 is in the range of 1-1.5 m, the diameter of the probe 110 is 1-3 mm, the inner diameter of the probe cover 120 is not less than 10mm, and the wall thickness is not less than 1mm.

Optionally, as shown in fig. 3, in an embodiment of the present utility model, in order to facilitate filling of the filler 140, a gap cavity is formed between the probe sleeve 120 and the probe 110, and the filler 140 is fully paved in the gap cavity, so that the probe 110 and the probe sleeve 120 are isolated, which not only can avoid the backflow of current, so as to form an electrical loop required for detecting the liquid level, but also can increase the fixing strength of the probe 110, thereby improving the accuracy of the detection result. The material of the filler 140 is not particularly limited, and may be, for example, polytetrafluoroethylene powder or zirconia powder having electrical insulation properties, as long as it is a material having high temperature resistance and electrical insulation properties. In addition, in order to prevent the filler 140 from flowing out of the interstitial cavity, two opposite openings are provided in the interstitial cavity along the axial direction of the probe 110, and a blocking block is detachably provided at the opening, so that the opening can be opened or blocked, thereby improving the structural stability of the whole device. The specific detachable manner of the plugging block is not particularly limited, and may be, for example, a clamping connection, an adhesive connection, or the like. It should be understood that the material of the plugging block may be the same as that of the filler 140, or may be other materials with high temperature resistance, and it should be noted that the plugging block has a bulk structure, and the shape of the plugging block is matched with the shape of the opening.

Optionally, in an embodiment of the present utility model, considering that the environmental temperature in the electric melting furnace 10 with the liquid level measuring device is relatively high, near 1600 ℃ in the high temperature state, in order to improve the high temperature resistance of the probe 110 and the probe sleeve 120, the probe 110 and the probe sleeve 120 are preferably in a conductive high temperature resistant platinum structure or a platinum rhodium alloy structure; in order to ensure high temperature resistance, the filler 140 and/or the plugging block are/is made of zirconia fine powder, and the plugging block is of a bulk structure made of zirconia. Since the probe 110 and the probe cover 120 need to be in continuous contact with the glass liquid surface, there is inevitably a flow of glass liquid to the outside of the fixing member 130, and in order to prevent the fixing member 130 from rusting, the fixing member 130 is preferably made of stainless steel.

Alternatively, as shown in fig. 2, in an embodiment of the present utility model, since the probe 110 and the probe cover 120 are generally disposed to be relatively long because the probe needs to extend into the melting furnace to detect the liquid level, the fixing performance between the probe 110 and the probe cover 120 is poor, so that the probe 110 is not stably fixed, and in this embodiment, the probe 110 and the probe cover 120 are fixedly connected to the fixing assembly 130 by disposing the fixing assembly 130 at the end of the probe 110 away from the probe 111. The shape of the fixing unit 130 is not particularly limited, and may be, for example, a fixing block, a fixing ring, or the like, as long as it can function to fix the probe 110 and the probe cover 120.

Optionally, as shown in fig. 2, in an embodiment of the present utility model, the fixing assembly 130 includes:

The fixed sleeve 131 is arranged at one end of the probe 110 far away from the probe 111, and the probe 110 and the probe sleeve 120 are connected with the fixed sleeve 131; and

The fixing tube 133 is bolted to the fixing sleeve 131, and the fixing tube 133 penetrates the inside of the fixing sleeve 131 and extends toward a side facing away from the probe 110.

Specifically, in order to conveniently fix the probe 110 and the probe cover 120 and electrically connect them with the sensing device, respectively, the fixing assembly 130 includes a fixing cover 131 and a fixing tube 133, fixedly connected with the probe 110 and the probe cover 120 through the fixing cover 131, and the fixing tube 133 penetrates the fixing cover 131 and is screw-coupled therewith, so that the sensing device can be electrically connected with the probe 110 and the probe cover 120 through the inside of the fixing tube 133 to the fixing cover 131. In another embodiment of the present utility model, as shown in fig. 3, a wire 135 of an external detection device is provided in the fixing assembly 130 and sequentially penetrates the fixing tube 133 and the fixing sleeve 131, and it is understood that at least one wire 135 is electrically connected to each of the probe 110 and the probe sleeve 120, thereby transmitting signals detected by the probe 110 and the probe sleeve 120 to the detection device. In another embodiment, in order to prevent the wires 135 inside the fixing assembly 130 from being shorted due to high temperature, an insulating sleeve is coated on the outer circumference of the wires 135, preferably, the insulating sleeve is made of ceramic, which can not only play a role in corrosion resistance, but also play a role in high temperature resistance and electrical insulation.

Optionally, as shown in fig. 2, in an embodiment of the present utility model, in order to prevent the liquid level measuring device 100 from falling into the melting furnace during liquid level detection, a baffle 137 is further provided on the fixing assembly 130, and by disposing the baffle 137 at an end of the fixing tube 133 away from the fixing sleeve 131, and the outer diameter of the baffle 137 is larger than that of the probe sleeve 120, it is understood that the wire 135 needs to penetrate the baffle 137 to be connected to the detection device.

In order to achieve the above objective, the present utility model further provides an electric melting furnace 10 with a liquid level measuring device, as shown in fig. 4, where the electric melting furnace 10 with a liquid level measuring device includes a melting furnace body 11 and a liquid level measuring device 100 in any embodiment, and the specific structure of the liquid level measuring device 100 refers to the above embodiment, and since the electric melting furnace 10 with a liquid level measuring device adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are not repeated herein. Wherein, the interior of the melting furnace body 11 forms a melting cavity for containing molten glass, the melting furnace body 11 is provided with a detection port 12 communicated with the melting cavity, and the liquid level measuring device 100 is slidably arranged at the detection port 12, so that the probe 111 and the probe sleeve 120 are abutted against the liquid level of the molten glass.

Optionally, as shown in fig. 4, in an embodiment of the present utility model, to assist the liquid level measuring device 100 in detecting the liquid level, the electric melting furnace 10 with the liquid level measuring device further includes a linear driving mechanism 13, where the linear driving mechanism 13 is disposed outside the melting furnace body 11, and the linear driving mechanism 13 is in driving connection with the liquid level measuring device 100, so as to drive the liquid level measuring device 100 to slide along the detection port 12. Under the drive of the linear driving mechanism 13, the probe 111 is first contacted with the liquid surface of the molten glass, and then the falling speed of the liquid level measuring device 100 is reduced by adjusting the linear driving mechanism 13 until the probe cover 120 is contacted with the liquid surface, and an electric circuit is formed among the probe 110, the molten glass, the probe cover 120 and the detection equipment due to the conductivity of the molten glass. Of course, in other embodiments, the linear driving mechanism 13 is electrically connected with a detecting device, and when the liquid level measuring device 100 reaches the liquid level to be measured, the detecting device controls the linear driving mechanism 13 to stop driving the liquid level measuring device 100 to slide continuously. In other embodiments, an indication device may also be provided in the liquid level measuring apparatus 100, and the indication device is electrically connected with the linear driving mechanism 13 to indicate that the driving speed thereof is slowed or stopped.

Alternatively, as shown in fig. 4, in an embodiment of the present utility model, the linear driving mechanism 13 includes:

a driving motor 14 fixed to the outside of the furnace body 11; and

The screw rod 15 is arranged on one side of the driving motor 14 and is connected with an output shaft of the driving motor 14, and the screw rod 15 is in threaded connection with the liquid level measuring device 100 so as to drive the liquid level measuring device 100 to move along the axial direction of the screw rod 15.

Specifically, the linear driving mechanism 13 includes a driving motor 14 and a screw 15, and one end of the screw 15 is connected to an output shaft of the driving motor 14, and the other end is screwed to the liquid level measuring device 100, so that the liquid level measuring device 100 can be driven to move in an axial direction of the screw 15, thereby moving in a direction approaching or separating from a liquid surface of the molten glass.

Optionally, as shown in fig. 4, in an embodiment of the present utility model, the electric melting furnace 10 with the liquid level measuring device further includes:

The fixed seat 16 is arranged on one side of the detection port 12 far away from the melting cavity, a sliding channel 17 communicated with the detection port 12 is arranged on the fixed seat 16, and the driving motor 14 is fixed on the fixed seat 16; and

The sliding block 18 is arranged on the fixed seat 16, the liquid level measuring device 100 is fixed on the sliding block 18, and the screw rod 15 is in threaded connection with the sliding block 18 to drive the sliding block 18 to slide along the sliding channel 17.

Specifically, in order to fix the driving motor 14 conveniently and assist the liquid level measuring device 100 to complete the reciprocating rectilinear motion, a fixing seat 16 is further provided in the electric melting furnace 10 with the liquid level measuring device, the driving motor 14 is installed on the fixing seat 16, a sliding channel 17 communicated with the detection port 12 is provided on the fixing seat 16, a sliding block 18 in threaded connection with the screw rod 15 is further provided, the liquid level measuring device 100 is fixed on the sliding block 18, and it is noted that the fixing mode of the sliding block 18 and the liquid level measuring device 100 is not limited specifically, for example, the fixing mode can be fixed between the sliding block 18 and the liquid level measuring device 100, or the sliding block 18 and the liquid level measuring device 100 can be fixedly connected together through a fixing shaft sleeve; in this way, the driving motor 14 can drive the screw rod 15 to rotate, so as to drive the slide block 18 to slide up and down, and further drive the liquid level measuring device 100 to move up and down, thereby smoothly completing the detection of the liquid level.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A liquid level measurement device for the liquid level detection of molten glass in an electric melting furnace, comprising:

A probe; and

The probe sleeve is arranged in a clearance with the probe and sleeved on the periphery of the probe, and the probe is provided with a probe head exposed out of the probe sleeve;

The probe and one end of the probe sleeve are respectively and electrically connected with the detection equipment, and when the liquid level measuring device reaches the liquid level to be measured, the other end of the probe and the other end of the probe sleeve are respectively contacted with the glass liquid, so that an electric loop is formed among the probe, the probe sleeve, the detection equipment and the glass liquid when the liquid level is detected.

2. The fluid level measurement device as defined in claim 1, wherein a gap cavity is formed between the probe sleeve and the probe, wherein an insulating filler is filled in the gap cavity to isolate the probe and the probe sleeve, and the gap cavity has two openings oppositely arranged along an axial direction of the probe; the liquid level measuring device further comprises a blocking block, wherein the blocking block is detachably arranged at the opening to open or block the opening.

3. The fluid level measurement device of claim 2, wherein the probe and the probe sleeve are of platinum or platinum-rhodium alloy construction; and/or, the filler is zirconia filler; and/or the plugging block is a zirconia plugging block.

4. The fluid level measurement device defined in claim 1, further comprising a securing assembly disposed at an end of the probe distal from the probe head, wherein the probe and the probe sleeve are fixedly connected to the securing assembly.

5. The fluid level measurement device defined in claim 4, wherein the securing assembly comprises:

The fixing sleeve is arranged at one end of the probe far away from the probe, and the probe sleeve are connected with the fixing sleeve; and

And the fixing pipe is connected with the fixing sleeve through bolts and penetrates through the fixing sleeve and extends towards one side deviating from the probe.

6. The fluid level gauge according to claim 5, wherein a wire is further disposed in the fixing assembly, one end of the wire is electrically connected to the detecting device, the other end of the wire penetrates through the fixing tube and the fixing sleeve to be electrically connected to the probe and the probe sleeve, and at least one wire is electrically connected to the probe and the probe sleeve; and/or the number of the groups of groups,

The fixed assembly further comprises a baffle plate, the baffle plate is arranged at one end, far away from the fixed sleeve, of the fixed pipe, and the lead penetrates through the baffle plate and is connected with the detection equipment.

7. An electric melting furnace with a liquid level measuring device, comprising:

the melting furnace comprises a melting furnace body, wherein a melting cavity is formed in the melting furnace body, conductive glass liquid is filled in the melting cavity, and a detection port communicated with the melting cavity is formed in the melting furnace body; and

The liquid level measurement device according to any one of claims 1 to 6, wherein the liquid level measurement device is slidably provided in the detection port so that the probe and the probe cover abut against a liquid surface of the molten glass.

8. The electric melting furnace with the liquid level measuring device according to claim 7, further comprising a linear driving mechanism, wherein the linear driving mechanism is arranged outside the melting furnace body and is in driving connection with the liquid level measuring device so as to drive the liquid level measuring device to slide along the detection port; and/or the number of the groups of groups,

The linear driving mechanism is electrically connected with the detection equipment, and the detection equipment controls the linear driving mechanism.

9. The electric melting furnace with a liquid level measuring apparatus of claim 8 wherein the linear drive mechanism comprises:

The driving motor is fixed outside the melting furnace body; and

The screw rod is arranged on one side of the driving motor and is connected with an output shaft of the driving motor, and the screw rod is in threaded connection with the liquid level measuring device so as to drive the liquid level measuring device to move along the axial direction of the screw rod.

10. The electric melting furnace with a liquid level measuring device of claim 9, wherein the electric melting furnace with a liquid level measuring device further comprises:

The fixed seat is arranged on one side of the detection port far away from the melting cavity, a sliding channel communicated with the detection port is arranged on the fixed seat, and the driving motor is fixed on the fixed seat; and

The sliding block is arranged on the fixed seat, the liquid level measuring device is fixed on the sliding block, and the screw rod is in threaded connection with the sliding block so as to drive the sliding block to slide along the sliding channel.