High-temperature steam pool liquid level device

Abstract

The invention provides a high-temperature steam pool liquid level device. The high-temperature steam pool liquid level device comprises a stroke indicating device, a rotating arm, a connecting line and a floating ball. The floating ball is located in the water pool and suspended on the rotating arm through a connecting line, the stroke indicating device is connected between the two ends of the rotating arm through a rotating shaft, and the stroke indicating device indicates the liquid level in the water pool through the rotating angle of the rotating arm; the stroke indicating device is located at the dry position. The connecting line is tied to the rotating arm to suspend the floating ball in the high-temperature steam pool, when the height of the floating ball changes along with the liquid level, the rotating arm is dragged to rotate by a corresponding angle, then the rotating angle is transmitted to the stroke indicating device through the rotating shaft, and the stroke indicating device indicates the height of the liquid level in the pool through the rotating angle. Through the device, the floating ball can be far away from the stroke indicating device for liquid level measurement, so that the stroke indicating device can be arranged at a normal-temperature dry place, electronic elements and a trigger structure in the stroke indicating device can be prevented from being influenced by high temperature and steam, and the use safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid level measurement, in particular to a high-temperature steam water pool liquid level device. Background Art

[0002] High-temperature steam is an important energy medium for steel mills to process molten steel. High-temperature steam needs to be controlled and stored during production. The thermal storage station is a control station that receives high-temperature steam from the active center and provides steam required by the steelmaking converter.

[0003] Since there is water vapor storage, liquid water will be produced. The excess water must be discharged. The temperature of the discharged water mixed with steam is as high as 120 degrees Celsius. However, the high-temperature water vapor needs to be processed or recycled after being discharged, and cannot be discharged directly. The pool for recycling high-temperature water vapor is called a flooding pool, that is, the pool where the heat storage device overflows. After the flooding pool collects water at a certain height, the water pump is started to pump it to other places for treatment. When the water level drops to the specified position, the water pump stops. Its control method is simple, but the main problem is that due to the high water temperature and the steam, the trigger structure of the general float is not resistant to high temperature, and the high-temperature steam is prone to leakage and other problems.

[0004] To avoid the above problems, steel mills have long been operated manually. The disadvantages of manual operation are high labor intensity and high safety risks. This area is a steam area with high-temperature pressure vessels and pipelines everywhere, which makes it easy to fall or get burned. Another point is inaccurate control. Sometimes inadequate inspections can cause water overflow, or insufficient experience of personnel can cause the water level to be too low, resulting in water pumps running without water, causing equipment damage.

[0005] Therefore, a float switch with low cost, easy installation, high temperature resistance and high reliability is needed. Summary of the invention

[0006] The object of the present invention is to provide a high-temperature steam pool liquid level device, which can be applied to a high-temperature steam pool, and the operation of the float is not affected by high temperature and steam, thereby improving safety;

[0007] The present invention provides a high-temperature steam water pool liquid level device, comprising a stroke indicating device, a rotating arm, a connecting line and a floating ball; the floating ball is located in the water pool, the floating ball is suspended on the rotating arm through the connecting line, the two ends of the rotating arm are connected to the stroke indicating device through a rotating shaft, the stroke indicating device indicates the liquid level in the water pool through the rotating angle of the rotating arm; the stroke indicating device is located in a dry place.

[0008] Furthermore, it also includes a water pump switch, and the stroke indicating device is connected to the water pump switch signal.

[0009] Furthermore, the travel indicating device comprises an indicating disk and an indicating pendulum needle, wherein the indicating pendulum needle is rotatably connected to the indicating disk, and the indicating pendulum needle is connected to the rotating shaft.

[0010] Furthermore, the indicator disk is provided with scales.

[0011] Furthermore, a proximity switch is provided on the indicator plate, and the proximity switch is connected to the water pump switch signal.

[0012] Furthermore, the proximity switch includes a low liquid level switch, and when the indicating pendulum needle rotates to the low liquid level switch, the low liquid level switch sends a water pump stop signal.

[0013] Furthermore, the proximity switch includes a high liquid level switch, and when the indicating pendulum needle rotates to the high liquid level switch, the high liquid level switch sends a water pump start signal.

[0014] Furthermore, the float is suspended at one end of the rotating arm through a connecting line, a counterweight is provided at the other end of the rotating arm, and the rotating shaft is connected to the rotating arm at a position between the connecting line and the counterweight.

[0015] Furthermore, the float is made of stainless steel.

[0016] Furthermore, the connecting wire is a steel rope.

[0017] The technical solution of the present invention uses a connecting line to suspend the float in a high-temperature steam pool, and the upper end of the connecting line is tied to a rotating arm. When the float changes height with the liquid level, the rotating arm is pulled to rotate a corresponding angle, and then the rotation angle is transmitted to the stroke indicating device through the rotating shaft. The stroke indicating device indicates the liquid level in the pool through the rotation angle. Through this device, the float can be kept away from the stroke indicating device for liquid level measurement, so that the stroke indicating device can be set in a dry place at normal temperature, and the electronic components and trigger structure inside it can be protected from the influence of high temperature and steam, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the connection relationship between the stroke indicating device, the rotating arm, the rotating shaft, the connecting line and the floating ball of the present invention;

[0020] Figure 2It is a schematic diagram of the working state of the present invention;

[0021] Description of reference numerals:

[0022] 1-travel indicating device; 101-indicating plate; 102-indicating pendulum needle; 103-scale;

[0023] 2-rotating arm; 201-rotating shaft; 202-counterweight;

[0024] 3-connecting line; 4-floating ball;

[0025] 501- low liquid level switch; 502- high liquid level switch;

[0026] 6-water pool; 601-float inlet; 602-excess steam exhaust chimney; 603-high temperature water vapor inlet; 604-water pumping port; 7-water pump switch. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example 1

[0031] like Figure 1-Figure 2 As shown, the present invention provides a high-temperature steam pool 6 liquid level device, comprising a stroke indicating device 1, a rotating arm 2, a connecting line 3 and a floating ball 4; the floating ball 4 is located in the pool 6, and the floating ball 4 is suspended on the rotating arm 2 through the connecting line 3, and the two ends of the rotating arm 2 are connected to the stroke indicating device 1 through a rotating shaft 201, and the stroke indicating device 1 indicates the liquid level in the pool 6 through the rotating angle of the rotating arm 2; the stroke indicating device 1 is located in a dry place. The floating ball 4 is made of stainless steel. The connecting line 3 is a steel rope.

[0032] Specifically, the preferred location of the stroke indicating device 1 is in a dry place to reduce the influence of steam on the working environment. For example, it can be directly placed outside the high-temperature steam pool, a float inlet 601 is opened on the top of the pool 6, the float 4 is located in the pool 6, the connecting line 3 suspends the float 4 and passes through the float inlet 601 upward, tied to the end of the rotating arm 2 above the pool 6, and the rotation angle of the rotating arm 2 is transmitted to the stroke indicating device 1 through the rotating shaft 201. The stroke indicating device 1 has a sufficient distance from the liquid surface, so that each charged body component is away from the liquid, thereby greatly reducing the probability of leakage of the equipment, and because the charged components of the stroke indicating device 1 do not contact the liquid, the insulation sealing requirements are lower than those of the traditional float 4, and the manufacturing cost is low. And because the electrical components in the stroke indicating device 1 are away from high-temperature water vapor and liquid, the situation of circuit failures such as short circuits caused by steam influence is significantly improved, and the safety is greatly improved; and when the stroke indicating device 1 needs to be replaced or repaired, it is more convenient to operate in an environment away from high-temperature steam, which is convenient for installation and maintenance. Compared with the traditional float 4 switch which is placed in water for a long time, prone to moisture ingress, corrosion and wire breakage, it has higher reliability.

[0033] The float 4 can be replaced with different materials according to different liquids or temperatures. In this embodiment, a stainless steel float 4 is welded with a sealed ball to provide buoyancy for the device. In special cases, a stainless steel thickened float 4 can be used, which has higher strength and is more resistant to use in high temperature environments. The connecting line 3 can be replaced with different materials according to the on-site water temperature and usage conditions. In this embodiment, a 2-4mm steel rope is selected to connect the float 4 and the rotating arm 2.

[0034] Traditional plastic float 4 and rubber cable (usually used at 0-70°C) will be damaged by rising temperature and are generally only used in a normal temperature water pool 6. However, the device has a wider applicable temperature range. The float 4 is made of stainless steel and the connecting line 3 is made of fine steel rope. The applicable temperature is 0-200°C, and the boiling water temperature is usually 100°C, that is, it is applicable as long as the water is not frozen.

[0035] In the traditional float 4 device, the live body is placed in water and the insulation is damaged, which is easy to leak electricity and has low safety. However, the live body of this device is connected to the float 4 through the connecting wire 3, and the live part is kept at a sufficient distance from the liquid surface, which is highly safe. Moreover, the live part can be placed in a dry place, which is convenient for installation, rain protection, replacement, etc., reducing the risk of electric shock.

[0036] The traditional float 4 device is inconvenient to replace, and needs to be replaced as a whole when a fault occurs. However, the present device can selectively replace the float 4 or replace the electronic components (such as proximity switches, etc.) in the stroke indicating device 1 according to the situation, which is convenient to replace and has lower cost.

[0037] Traditional float 4 devices have high waterproof requirements. The entire float 4 switch device needs to be waterproof when placed in water. If it is slightly damaged, the entire device will be scrapped. However, this device only needs to seal the float 4 ball. In the absence of a special float 4, ordinary glass bottles with good caps can serve as floats 4, which greatly reduces maintenance costs.

[0038] Example 2

[0039] It also includes a water pump switch 7, and the stroke indicating device 1 is connected to the water pump switch 7 by signal. The stroke indicating device 1 includes an indicating disk 101 and an indicating pendulum needle 102, and the indicating pendulum needle 102 is rotatably connected to the indicating disk 101, and the indicating pendulum needle 102 is connected to the rotating shaft 201. A scale 103 is provided on the indicating disk 101. A proximity switch is provided on the indicating disk 101, and the proximity switch is connected to the water pump switch 7 by signal. The proximity switch includes a low liquid level switch 501, and when the indicating pendulum needle 102 rotates to the low liquid level switch 501, the low liquid level switch 501 sends a water pump stop signal. The proximity switch includes a high liquid level switch 502, and when the indicating pendulum needle 102 rotates to the high liquid level switch 502, the high liquid level switch 502 sends a water pump start signal.

[0040] Specifically, the liquid level indicator disk 101 is a disk-shaped structure, and a scale 103 is marked along the circumference of the disk. The liquid level scale is calibrated according to the on-site water level and the size of the pool. The indicating pendulum needle 102 is rotatably connected to the center of the indicating disk 101, and is drivenly / fixedly connected to the rotating shaft 201. When the float 4 falls, the indicating pendulum needle 102 swings toward the float 4, and when the float 4 rises, the indicating pendulum needle 102 swings away from the float 4.

[0041] A chimney 602 for removing excess steam is provided on the top of the water pool 66, a high-temperature water vapor inlet 603 and a water pumping port 604 are provided on the wall of the water pool 6, and a water pump is connected to the water pumping port 604 through a pipeline for draining or stopping drainage. The water pump switch 7 is used to control the start and stop of the water pump. The water pump switch 7 can be triggered by a proximity switch, and the water pump switch 7 and the proximity switch are connected through a circuit wire to realize signal transmission. The water pump, the water pump switch 7 and the proximity switch are all mature existing technology products and can be directly purchased and obtained, and their structure and function are not described in detail.

[0042] When the liquid level in the pool 6 is appropriate, the length of the connecting line 3 makes the rotating arm 2 in a horizontal position. At this time, the liquid level scales of 0 / 100 (percentage) are marked on the two ends of the horizontal direction of the indicator disk 101, and the liquid level scales of 25 / 50 / 75 (percentage) are evenly spaced in the middle semicircular area. When the liquid level in the pool 6 is appropriate, the indicating pendulum needle 102 points to the central 50 liquid level scale; when the liquid level drops, the indicating pendulum needle 102 swings toward the 25 liquid level scale until it reaches the 25 liquid level scale, triggering the low liquid level switch 501 at this position. The proximity switch conducts a signal to the electrical control circuit to control the water pump to stop draining; when the liquid level rises, the indicating pendulum needle 102 swings toward the 75 liquid level scale until it reaches the 75 liquid level scale, triggering the high liquid level switch 502 at this position. The proximity switch conducts a signal to the electrical control circuit to control the water pump to start draining. The 0 and 100 level scales represent the complete draining or filling of the reservoir 6 .

[0043] In addition, the number of proximity switches can be increased or decreased to achieve precise control. For example, a 65 level gauge can be set between a 50 level gauge and a 75 level gauge, and a proximity switch can be set at this position. When the indicating pendulum needle 102 triggers the proximity switch, a signal is sent to the water pump switch 7 to drain water at a low flow rate; or an 85 level gauge can be set between a 75 level gauge and a 100 level gauge, and a proximity switch can be set at this position. When the indicating pendulum needle 102 triggers the proximity switch, a signal is sent to the water pump switch 7 to drain water at a high flow rate.

[0044] When the traditional float device is placed on the water surface, the liquid level fluctuation for a long time will cause mechanical fatigue of the cable, and the cable will often break. The float inside the float will also be easily damaged after hitting the micro switch for a certain number of times. The sealed connection will also cause water seepage and other faults if it is soaked in water for a long time. However, the proximity switch part of this device is in a dry place with a lower probability of damage, and the float part has high mechanical strength and is not easy to be damaged.

[0045] Example 3

[0046] The float 4 is suspended at one end of the rotating arm 2 through the connecting line 3 , and a counterweight 202 is provided at the other end of the rotating arm 2 . The rotating shaft 201 is connected to the rotating arm 2 between the connecting line 3 and the counterweight 202 .

[0047] Specifically, in the aforementioned embodiment 1 or 2, the center of gravity of the rotating arm 2 itself and the connection position of the rotating shaft 201 can be used to automatically rotate the rotating arm 2 when the floating ball 4 rises. For example, the connection position of the rotating shaft 201 is located on the side of the rotating arm 2 close to the floating ball 4, so that the center of gravity of the rotating arm 2 is located on the side of the connection of the rotating shaft 201 away from the floating ball 4, so that it automatically rotates. In this embodiment 3, the rotating shaft 201 can be connected to the center of gravity of the middle part of the rotating arm 2, and the rotating arm 2 can be rotated when the floating ball 4 rises by setting a counterweight 202 at the end away from the connecting line 3 and the floating ball 4. And the buoyancy size changes due to the buoyancy of the on-site water pool 6 and the selected material and size of the floating ball 4, and the counterweight block can be added or subtracted as needed to achieve force balance, so that the indicating pendulum needle 102 indicates accurately and reduces shaking.

[0048] Working mode and principle of this device:

[0049] The float 4 floats on the liquid surface in the water pool 6 and is suspended at one end of the rotating arm 2 through the connecting line 3. A counterweight 202 is set at the other end of the rotating arm 2. The rotating arm 2 is connected to the rotating shaft 201 and connected to the indicating pendulum needle 102. The indicating pendulum needle 102 is rotatably connected to the indicating disk 101, and the indicating disk 101 is marked with a liquid level scale 103.

[0050] When the liquid level in the water tank 6 is at an appropriate level, the indicating pendulum needle 102 points to the 50 liquid level scale in the center;

[0051] When the liquid level drops, the float 4 falls, pulls the rotating arm 2 to rotate through the connecting line 3, and transmits the signal to the indicating pendulum needle 102 through the rotating shaft 201 to swing toward the 25 liquid level scale, until it reaches the 25 liquid level scale, triggering the low liquid level switch 501 at that position. The proximity switch conducts a signal to the electrical control circuit to control the water pump to stop draining water;

[0052] When the liquid level rises, the float 4 floats up and loses its pull on the rotating arm 2. The counterweight 202 causes the rotating arm 2 to rotate, and the signal is transmitted to the indicating pendulum needle 102 through the rotating shaft 201 to swing toward the 75 liquid level scale. When the liquid level scale is reached, the high liquid level switch 502 located at this position is triggered. The proximity switch is turned on to send a signal to the electrical control circuit to control the water pump to start draining water.

[0053] Compared with the traditional float switch, this device requires less investment, is simple to manufacture and install, has higher safety, more reliable performance, is easy to operate and repair, has strong adaptability under the same conditions, can realize high and low liquid level detection, sends out corresponding control signals to control the equipment to meet the corresponding requirements for action, is suitable for a variety of liquids and higher temperatures, is easy to modify, and has low sealing requirements. It can improve the equipment operation rate, reduce maintenance costs, and ensure personal safety.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-temperature steam pool liquid level device, characterized in that: It includes a travel indicating device, a rotating arm, a connecting line and a floating ball; The float is located in the water pool, and the float is suspended on the rotating arm through a connecting line. The two ends of the rotating arm are connected to the stroke indicating device through a rotating shaft, and the stroke indicating device indicates the liquid level in the water pool through the rotating angle of the rotating arm; The travel indicating device is located in a dry place.

2. The high-temperature steam pool liquid level device according to claim 1, characterized in that: It also includes a water pump switch, and the stroke indicating device is connected to the water pump switch signal.

3. The high-temperature steam pool liquid level device according to claim 2, characterized in that: The travel indicating device comprises an indicating disk and an indicating pendulum needle, wherein the indicating pendulum needle is rotatably connected to the indicating disk and is connected to the rotating shaft.

4. The high-temperature steam pool liquid level device according to claim 3, characterized in that: The indicating disk is provided with scales.

5. The high-temperature steam pool liquid level device according to claim 3, characterized in that: The indicator plate is provided with a proximity switch, and the proximity switch is connected with the water pump switch signal.

6. The high-temperature steam pool liquid level device according to claim 5, characterized in that: The proximity switch includes a low liquid level switch. When the indicating pendulum needle rotates to the low liquid level switch, the low liquid level switch sends a water pump stop signal.

7. The high-temperature steam pool liquid level device according to claim 5, characterized in that: The proximity switch includes a high liquid level switch. When the indicating pendulum needle rotates to the high liquid level switch, the high liquid level switch sends a water pump start signal.

8. The high-temperature steam pool liquid level device according to claim 1, characterized in that: The float is suspended at one end of the rotating arm through a connecting line, a counterweight is provided at the other end of the rotating arm, and the rotating shaft is connected to the rotating arm at a position between the connecting line and the counterweight.

9. The high-temperature steam pool liquid level device according to claim 1, characterized in that: The float is made of stainless steel.

10. The high temperature steam pool liquid level device according to claim 1, characterized in that: The connecting wire is a steel rope.

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