Tank liquid level detection system and method

Abstract

The invention discloses a tank liquid level detection system which comprises a bearing table used for bearing the whole tank, and a weighing sensor is arranged between the bearing table and the ground and used for collecting the total weight of the tank. The moving device is independently arranged relative to the bearing table, is used for moving the tank body from a specified position to the bearing table, and can move the tank body from the bearing table to the specified position after weighing is finished; the data processing module is used for obtaining data collected by the weighing sensor, and the liquid level height in the tank body is obtained through calculation. The invention further discloses a method for detecting the liquid level in the tank body, the height of the liquid level in the tank body is indirectly detected by measuring the weight change of the tank body, and the method has the advantages of being simple in structure, high in precision, good in stability, convenient to maintain and the like. And the liquid level change in the tank body can be monitored in real time in the process of adding the raw materials into the tank body, so that the addition amount of the raw materials is accurately controlled.

Description

Technical Field

[0001] The invention relates to the technical field of raw material metering in a tank, and in particular to a tank liquid level detection system and method. Background Art

[0002] In the industrial processing, it is necessary to detect the liquid level of various industrial tanks. Traditional liquid level detection methods, such as float method, ultrasonic method, radar method, etc., may have problems such as measurement errors, complex maintenance or high cost; especially in some applications with high precision requirements, existing technologies may not be able to meet the needs.

[0003] In the field of gypsum board processing, the measurement of raw materials directly affects the quality of the gypsum board. Therefore, in the process of adding raw materials into the tank, the liquid level of the raw materials in the tank needs to be monitored in real time. However, the detection method of the existing technology has low accuracy and the detection result has a lag, which makes it impossible to achieve real-time monitoring and cannot meet the production needs of gypsum board processing. Summary of the invention

[0004] The object of the present invention is to provide a tank liquid level detection system and a tank liquid level detection method, which obtain the weight of the tank and obtain the liquid level in the tank through calculation to solve the technical problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0006] A tank liquid level detection system comprises: a load-bearing platform for bearing the entire tank; a weighing sensor arranged on the load-bearing platform for collecting the total weight of the tank; a moving device independently arranged relative to the load-bearing platform for moving the tank from a specified position to the load-bearing platform, and capable of moving the tank from the load-bearing platform to a specified position after weighing; and a data processing module for acquiring the data collected by the weighing sensor and obtaining the liquid level height in the tank by calculation.

[0007] Furthermore, the load-bearing platform is arranged on the ground, and the upper surface of the load-bearing platform and the ground are located in the same plane; the moving device includes a moving trolley, and the moving trolley is provided with a cavity running through the entire trolley in the vertical direction, and the trolley is provided with a clamping mechanism capable of clamping the tank body at the cavity.

[0008] Furthermore, the mobile trolley is provided with a moving mechanism capable of driving the clamping mechanism to move in a vertical direction, so that during the movement of the moving device, the bottom of the tank body can be separated from the ground.

[0009] Furthermore, the trolley is provided with two groups of baffles that can be opened and closed at the bottom of the cavity, and the two groups of baffles are in a closed state when the moving device is moving, so as to provide support force for the tank body located in the cavity.

[0010] Furthermore, the clamping mechanism includes a telescopic device and a clamping handle, the clamping handle is provided with at least three groups, each of the clamping handles corresponds to at least one group of the telescopic device, the clamping handle is arranged at the movable end of the telescopic device, and the other end of the telescopic device is connected to the movable end of the movable mechanism; the telescopic device is parallel to the horizontal plane, and the telescopic direction of the telescopic device is toward the axis of the cavity; the clamping handles are distributed at equal intervals on the circumference with the axis of the cavity as the center.

[0011] Furthermore, the clamping handle includes a vertical connecting rod and positioning blocks arranged at both ends of the connecting rod; the side wall of the tank body is provided with two groups of annular grooves in the horizontal direction, and the two positioning blocks of the clamping handle can be respectively clamped in the two groups of annular grooves, so that the clamping handle applies a supporting force in the vertical direction to the tank body while clamping the tank body.

[0012] Furthermore, the moving mechanism includes a screw pair, an inner cavity is provided inside the trolley in the vertical direction, the side wall of the inner cavity is provided with a through groove connected to the cavity, the screw pair is vertically arranged inside the inner cavity, and the end of the telescopic device passes through the through groove and is connected to the nut of the screw pair.

[0013] Furthermore, a partition connected to the cavity is provided in the horizontal direction below the trolley, and the two groups of baffles are horizontally arranged in the partition, symmetrically arranged relative to the axis of the cavity; electric telescopic rods are respectively provided between the edges of the two groups of baffles and the inner side walls of the partition, and the two ends of the electric telescopic rods are respectively connected to the baffles and the partition, so that the two groups of baffles can be opened and closed in the cavity under the telescopic drive of the electric telescopic rods.

[0014] In order to solve the above technical problems, the present invention further provides the following technical solutions:

[0015] A method for detecting the liquid level in a tank body, based on the above tank body liquid level detection system, comprises the following steps:

[0016] S001, obtaining the overall weight of the tank containing the raw material through a weighing sensor, and the weighing sensor transmits the collected data signal to a data processing module; wherein the raw material is slurry or liquid;

[0017] S002, the data processing module receives the data signal and obtains the liquid level height in the tank through calculation;

[0018] S003, the data processing module transmits the calculated liquid level height to the PLC module, which can monitor the liquid level changes in the tank in real time during the process of adding raw materials into the tank, so as to accurately control the amount of raw materials added.

[0019] Furthermore, the calculation formula is: h = V1-V2 / π·r 2 ;

[0020] Among them, h is the height of the liquid level; V1 is the overall weight of the tank containing the raw materials; V2 is the weight of the tank; r is the radius of the inner cavity of the tank.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The invention provides a method for detecting the liquid level in a tank body, which indirectly detects the height of the liquid surface in the tank body by measuring the weight change of the tank body, and has the advantages of simple structure, high precision, good stability, and convenient maintenance.

[0023] The present invention also provides a tank liquid level detection system, which moves the tank to a load-bearing platform by a mobile trolley to weigh the tank to obtain weight data; the tank is moved by the mobile trolley to reduce safety hazards, especially when the tank is filled with raw materials, the tank is moved by the mobile trolley to prevent the tank from tipping over.

[0024] Furthermore, the trolley is equipped with a clamping mechanism to enable the can to be picked up and put down, reducing manual involvement in the entire process, thereby lowering labor intensity and reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] Figure 1 It is a structural schematic diagram of a tank liquid level detection system of the present invention;

[0027] Figure 2 It is a top view of the cavity in the mobile vehicle of the present invention.

[0028] The numbers in the figure represent the following:

[0029] 1- load-bearing platform, 2- weighing sensor, 3- moving device, 4- tank body;

[0030] 31-mobile trolley, 32-clamping mechanism, 33-baffle, 34-mobile mechanism, 35-cavity;

[0031] 321- telescopic device, 322- clamping handle, 3221- connecting rod, 3222- positioning block, 3223- annular groove;

[0032] 341-screw pair, 342-inner cavity, 343-through groove;

[0033] 331- compartment, 332- electric telescopic rod, 333- ball bearing. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0035] like Figure 1 As shown, the present invention provides an implementation of a tank body 4 liquid level detection system, including a load-bearing platform 1, a weighing sensor 2, a moving device 3 and a data processing module.

[0036] Among them, the weighing sensor 2 is arranged between the load-bearing platform 1 and the ground, the moving device 3 is independently arranged relative to the load-bearing platform 1, the moving device 3 is used to move the tank body 4 from a specified position to the load-bearing platform 1, and the load-bearing platform 1 is used to carry the entire tank body 4; the total weight of the tank body 4 is collected by the weighing sensor 2.

[0037] The data processing module is used to obtain the data collected by the weighing sensor 2 and obtain the liquid level height in the tank body 4 through calculation.

[0038] The moving device 3 can also move the tank body 4 from the load-bearing platform 1 to a designated position after the liquid level detection is completed; in the actual production process of the gypsum board, the tank body 4 is weighed while adding raw materials, which are slurry. During the process of adding raw materials, the liquid level in the tank body 4 is monitored in real time. When the liquid level in the tank body 4 reaches a preset value, the addition of raw materials is stopped; the moving device 3 can transport the tank body 4 to the next workstation.

[0039] This embodiment provides an example of a load-bearing platform 1 and a moving device 3, as shown in the figure:

[0040] Among them, the load-bearing platform 1 adopts a floor scale weighing structure, a groove is opened on the ground, the load-bearing platform 1 is set in the groove, the weighing sensor 2 is set between the load-bearing platform 1 and the bottom of the groove, and the upper surface of the load-bearing platform and the ground are in the same plane; the weighing sensor 2 used is a bridge-type weighing sensor 2.

[0041] The moving device 3 comprises a moving trolley 31 . The moving trolley 31 is provided with a cavity 35 penetrating the entire trolley in the vertical direction. The trolley is provided with a clamping mechanism 32 capable of clamping the tank body 4 at the cavity 35 .

[0042] The tank body 4 can be hoisted to the cavity 35 of the mobile trolley 31 by an external hoisting mechanism, and then the hoist moves downward to make the tank body 4 fall into the cavity 35, and the tank body 4 is clamped by the clamping mechanism 32.

[0043] After the tank body 4 is placed, the mobile cart 31 moves to the load-bearing platform 1, so that the tank body 4 is located above the load-bearing platform 1, and the wheels of the mobile cart 31 will not fall on the load-bearing platform 1, and the clamping mechanism 32 releases the clamping of the tank body 4, so that the tank body 4 falls on the load-bearing platform 1, and raw materials are started to be added into the tank body 4; when the raw materials are added, the clamping mechanism 32 clamps the tank body 4, and the mobile cart 31 moves the tank body 4 to the next workstation.

[0044] In this embodiment, the moving trolley 31 is provided with a moving mechanism 34 capable of driving the clamping mechanism 32 to move in the vertical direction, so that the bottom of the tank body 4 can be separated from the ground during the movement of the moving device 3 .

[0045] In this embodiment, the moving trolley 31 is provided with two sets of baffles 33 that can be opened and closed at the bottom of the cavity 35 . The two sets of baffles 33 are in a closed state when the moving device 3 is moving, and are used to provide support force for the tank body 4 located in the cavity 35 .

[0046] When the tank body 4 is hoisted onto the mobile trolley 31, the two sets of baffles 33 are in a closed state in the cavity 35; when the tank body 4 needs to be dropped onto the load-bearing platform 1, the two sets of baffles 33 are opened, and the moving mechanism 34 drives the entire tank body 4 to move downward until the bottom of the tank body 4 contacts the load-bearing platform 1 to prevent the tank body 4 from falling directly onto the load-bearing platform 1.

[0047] When the raw materials are added, the clamping mechanism 32 clamps the tank body 4, and the moving mechanism 34 drives the entire clamping mechanism 32 and the tank body 4 to move upward, so that the bottom of the tank body 4 is located above the baffle 33, and the two groups of baffles 33 are closed to restore the support for the tank body 4.

[0048] This embodiment provides an example of a clamping structure, such as Figure 1 As shown:

[0049] The clamping mechanism 32 includes a telescopic device 321 and a clamping handle 322. The clamping handle 322 is provided with at least three groups. In this embodiment, the clamping handle 322 is provided with four groups. Each clamping handle 322 corresponds to at least one group of telescopic devices 321. In this embodiment, each clamping handle 322 is provided with two groups of telescopic devices 321.

[0050] The clamping handle 322 is arranged at the movable end of the telescopic device 321, and the other end of the telescopic device 321 is connected to the movable end of the moving mechanism 34; the telescopic device 321 is parallel to the horizontal plane, and the telescopic direction of the telescopic device 321 is toward the axis of the cavity 35; the clamping handle 322 is distributed at equal intervals on the circumference with the axis of the cavity 35 as the center.

[0051] In this embodiment, the telescopic device 321 is a hydraulic telescopic rod.

[0052] Furthermore, the clamping handle 322 includes a vertical connecting rod 3221 and positioning blocks 3222 arranged at both ends of the connecting rod 3221; the two groups of telescopic devices 321 corresponding to each clamping handle 322 are arranged in parallel, and act on the two ends of the connecting rod 3221 respectively; the side wall of the tank body 4 is provided with two groups of annular grooves 3223 in the horizontal direction, and the two positioning blocks 3222 of the clamping handle 322 can be respectively stuck in the two groups of annular grooves 3223, so that the clamping handle 322 can apply a supporting force in the vertical direction to the tank body 4 while clamping the tank body 4.

[0053] This embodiment provides an example of the moving mechanism 34, such as Figure 1 As shown:

[0054] The moving mechanism 34 includes a screw pair 341, an inner cavity 342 is provided inside the trolley in the vertical direction, the side wall of the inner cavity 342 is provided with a through groove 343 connected to the cavity 35, the screw pair 341 is vertically arranged inside the inner cavity 342, and the end of the telescopic device 321 passes through the through groove 343 and is connected to the nut of the screw pair 341; the entire clamping mechanism 32 is driven to move in the vertical direction through the screw pair 341.

[0055] This embodiment provides an example of the baffle 33, such as Figure 1 and Figure 2 As shown:

[0056] A partition 331 connected to the cavity 35 is provided in the horizontal direction below the trolley, and two groups of baffles 33 are horizontally arranged in the partition 331 and symmetrically arranged relative to the axis of the cavity 35. Electric telescopic rods 332 are respectively provided between the edges of the two groups of baffles 33 and the inner side walls of the partition 331. The two ends of the electric telescopic rod 332 are respectively connected to the baffle 33 and the partition 331, so that the two groups of baffles 33 can be opened and closed in the cavity 35 under the telescopic drive of the electric telescopic rod 332.

[0057] In this embodiment, the closed state of the two groups of baffles 33 does not necessarily require that the edges of the two groups of baffles 33 are completely in contact with each other; as long as the two groups of baffles 33 can apply supporting force to the tank body 4 from both sides below the tank body 4, the two groups of baffles 33 in this state can be defined as a closed state.

[0058] Furthermore, balls 333 are evenly spaced on the upper and lower surfaces of the baffle 33 to facilitate the movement of the baffle 33 in the partition 331 and convert the sliding friction between the bottom of the tank body 4 and the baffle 33 into rolling friction, thereby facilitating the relative movement of the baffle 33 relative to the tank body 4.

[0059] The present invention also provides an implementation of a method for detecting the liquid level in a tank body 4, based on the above-mentioned tank body 4 liquid level detection system, comprising the following steps:

[0060] S001, the whole weight of the tank 4 containing the raw materials is obtained through the weighing sensor 2, and the weighing sensor 2 transmits the collected data signal to the data processing module; wherein the raw materials are slurry or liquid.

[0061] S002, the data processing module receives the data signal and obtains the liquid level height in the tank body 4 through calculation.

[0062] The calculation formula is: h = V1-V2 / π·r 2 .

[0063] Among them, h is the height of the liquid level; V1 is the overall weight of the tank body 4 containing the raw materials; V2 is the weight of the tank body 4; and r is the radius of the inner cavity 342 of the tank body 4.

[0064] S003, the data processing module transmits the calculated liquid level height to the PLC module, which can monitor the liquid level changes in the tank body 4 in real time during the process of adding raw materials into the tank body 4, so as to accurately control the amount of raw materials added.

[0065] The PLC module can control the start and stop of the raw material adding device. The tank body 4 is placed on the load-bearing platform 1. After the weighing sensor 2 collects the weight data, the PLC module controls the raw material adding device to start; when the liquid level of the slurry in the tank body 4 reaches the set height, the PLC module controls the raw material adding device to stop.

[0066] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A tank (4) liquid level detection system, characterized in that: include: A load-bearing platform (1) for bearing the entire tank body (4); A weighing sensor (2), arranged between the load-bearing platform (1) and the ground, for collecting the total weight of the tank body (4); A moving device (3) is independently arranged relative to the load-bearing platform (1), and is used to move the tank body (4) from a specified position to the load-bearing platform (1), and can move the tank body (4) from the load-bearing platform (1) to the specified position after weighing is completed; The data processing module is used to obtain the data collected by the weighing sensor (2) and obtain the liquid level height in the tank body (4) through calculation.

2. The tank body (4) liquid level detection system according to claim 1, characterized in that: The load-bearing platform (1) is arranged on the ground, and the upper surface of the load-bearing platform and the ground are located in the same plane; the moving device (3) comprises a moving trolley (31), the moving trolley (31) is provided with a cavity (35) running through the entire trolley in the vertical direction, and the trolley is provided with a clamping mechanism (32) capable of clamping the tank body (4) at the cavity (35).

3. The tank body (4) liquid level detection system according to claim 2, characterized in that: The moving trolley (31) is provided with a moving mechanism (34) capable of driving the clamping mechanism (32) to move in a vertical direction, so that during the movement of the moving device (3), the bottom of the tank body (4) can be separated from the ground.

4. The tank body (4) liquid level detection system according to claim 1, characterized in that: The moving trolley (31) is provided with two groups of baffles (33) that can be opened and closed at the bottom of the cavity (35); the two groups of baffles (33) are in a closed state during the movement of the moving device (3) and are used to provide support force for the tank body (4) located in the cavity (35).

5. The tank body (4) liquid level detection system according to claim 1, characterized in that: The clamping mechanism (32) comprises a telescopic device (321) and a clamping handle (322), the clamping handle (322) being provided with at least three groups, each of the clamping handles (322) corresponding to at least one group of the telescopic device (321), the clamping handle (322) being provided at the movable end of the telescopic device (321), and the other end of the telescopic device (321) being connected to the movable end of the moving mechanism (34); The telescopic device (321) is parallel to a horizontal plane, and the telescopic direction of the telescopic device (321) is toward the axis of the cavity (35); the clamping handles (322) are distributed at equal intervals around a circle with the axis of the cavity (35) as the center.

6. The tank body (4) liquid level detection system according to claim 1, characterized in that: The clamping handle (322) comprises a vertical connecting rod (3221) and positioning blocks (3222) arranged at both ends of the connecting rod (3221); the side wall of the tank body (4) is provided with two groups of annular grooves (3223) in the horizontal direction, and the two positioning blocks (3222) of the clamping handle (322) can be respectively clamped in the two groups of annular grooves (3223), so that the clamping handle (322) can apply a supporting force in the vertical direction to the tank body (4) while clamping the tank body (4).

7. The tank body (4) liquid level detection system according to claim 1, characterized in that: The moving mechanism (34) includes a screw pair (341), an inner cavity (342) is provided inside the trolley in the vertical direction, and the side wall of the inner cavity (342) is provided with a through groove (343) connected to the cavity (35), the screw pair (341) is vertically arranged inside the inner cavity (342), and the end of the telescopic device (321) passes through the through groove (343) and is connected to the nut of the screw pair (341).

8. The tank body (4) liquid level detection system according to claim 1, characterized in that: A partition (331) connected to the cavity (35) is provided in the horizontal direction below the trolley, and two groups of baffles (33) are horizontally arranged in the partition (331) and symmetrically arranged relative to the axis of the cavity (35); Electric telescopic rods (332) are respectively provided between the edges of the two groups of baffles (33) and the inner side walls of the partition (331), and the two ends of the electric telescopic rods (332) are respectively connected to the baffles (33) and the partition (331), so that the two groups of baffles (33) can be opened and closed in the cavity (35) under the telescopic drive of the electric telescopic rods (332).

9. A method for detecting the liquid level in a tank (4), characterized in that: The tank body (4) liquid level detection system according to any one of claims 1 to 8 comprises the following steps: S001, obtaining the overall weight of a tank (4) containing raw materials through a weighing sensor (2), and the weighing sensor (2) transmits the collected data signal to a data processing module; wherein the raw materials are slurry or liquid; S002, the data processing module receives the data signal and obtains the liquid level height in the tank (4) through calculation; S003, the data processing module transmits the calculated liquid level height to the PLC module, which can monitor the liquid level changes in the tank body (4) in real time during the process of adding raw materials into the tank body (4) to accurately control the amount of raw materials added.

10. The method for detecting the liquid level in a tank body (4) according to claim 9, characterized in that: The calculation formula is: h=V1-V2 / π·r 2 ; Wherein, h is the height of the liquid level; V1 is the overall weight of the tank body (4) containing the raw materials; V2 is the weight of the tank body (4); and r is the radius of the inner cavity (342) of the tank body (4).

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