Cement mortar tank residual mortar amount monitoring device, automatic backward flowing equipment and method

Abstract

The invention provides a device for monitoring the residual ash amount of a cement ash tank and automatic tank dumping equipment and method, and belongs to the technical field of automatic detection and control. The residual ash amount monitoring device for the cement ash tank comprises the cement ash tank, a radar object (liquid) level meter is arranged at the top of the cement ash tank, a discharging port is formed in the bottom of the cement ash tank, and an automatic valve structure is arranged on the discharging port; and the control system is respectively connected with the radar object (liquid) level meter and the automatic valve structure, and is respectively used for receiving monitoring data transmitted by the radar object (liquid) level meter, obtaining the residual ash amount in the cement ash tank through calculation, and controlling the automatic valve structure to be gradually opened or closed according to the residual ash amount so as to control the discharge flow. In the well cementation construction process, the remaining amount of cement mortar and the volume of the cement mortar in the cement mortar tank are automatically monitored and calculated in real time, and automatic pouring operation of the cement mortar tank is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic detection and control, and in particular relates to a device for monitoring the amount of residual ash in a cement ash tank, and automatic tank emptying equipment and method. Background Art

[0002] In recent years, petroleum engineering technology has developed rapidly. Many engineering design problems can be designed using computer software. The use of computer software is an indispensable means to reduce the workload of engineering design. Therefore, the field of petroleum engineering has begun to develop from informatization to automation and intelligence, and cementing engineering, as a sub-field of petroleum engineering, is no exception.

[0003] The cementing engineering is gradually developing towards automation and intelligence in the entire process from design, construction and evaluation. At the same time, in the context of oil companies reducing costs and increasing efficiency, the research and development of automated cementing equipment has become a general trend. Compared with conventional cementing equipment, automated cementing equipment has better performance and a higher degree of automation, which is more in line with the requirements of future cementing operations and meets the strategic goal of reducing costs and increasing efficiency in shale gas extraction.

[0004] Cement is one of the important raw materials in the cementing construction process. In the cementing construction process, in order to judge the remaining amount of cement tank, people usually knock on the outer wall of the storage tank to judge whether there is cement inside the knocking point by the sound, so as to determine the amount of cement in the tank. Due to the high height of cement storage tanks and the high pressure generated by sucking cement in the tank during cementing construction, which is not conducive to the safety of workers, etc., the measurement of cement tank remaining amount is time-consuming and laborious.

[0005] In cementing construction, cement often needs to be stored in two or more cement tanks. In order to ensure the continuity of cementing construction, construction workers determine the remaining cement ash by knocking on the outer wall of the cement tank. When the cement ash in the cement tank used for construction is about to run out, another cement tank will be opened and the cement ash in the tank will be used to continue the construction. When the cement ash in the previous cement tank is used up, it will be closed. This process usually requires construction workers to determine the time point for tank replacement based on experience and complete the operation. In addition, due to the high-pressure pipelines in cementing construction, manual operation has certain safety hazards. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a cement ash tank residual ash amount monitoring device, automatic tank emptying equipment and method, which can accurately measure the cement ash residual amount in the cement tank; by monitoring the residual ash amount of cement ash in the cement tank, the function of automatically replacing the cement tank during the cementing construction process is realized, thereby enhancing the degree of automation of cementing construction.

[0007] The present invention is achieved through the following technical solutions:

[0008] A first aspect of the present invention provides a device for monitoring the amount of residual ash in a cement ash tank, comprising:

[0009] A cement ash tank, wherein a radar material (liquid) level meter is arranged on the top of the cement ash tank, a discharge port is arranged on the bottom of the cement ash tank, and an automatic valve structure is arranged on the discharge port;

[0010] The control system is connected with the radar object (liquid) level meter and the automatic valve structure respectively.

[0011] A further improvement of the present invention is:

[0012] The radar (liquid) level meter is connected to the cement ash tank via a flange; and / or,

[0013] When the cement ash tank body is a cylindrical structure, the radar level meter is installed at 1 / 4 to 1 / 6 of the cement ash tank diameter, and the minimum distance from the cement ash tank wall is not less than 200 mm; and / or,

[0014] When the upper part of the cement ash tank is a cylindrical structure and the lower part is a cone, the radar (liquid) level meter is installed in the middle of the top of the cement ash tank.

[0015] A further improvement of the present invention is:

[0016] The radar object (liquid) level meter is provided with a wireless data transmission module for transmitting the monitored data to the control system.

[0017] A further improvement of the present invention is:

[0018] The automatic valve structure comprises a discharge valve arranged on the discharge port, a discharge switch is arranged on the discharge port valve, and the discharge switch is connected to the control system;

[0019] The control system controls the gradual opening or closing of the discharge switch according to the level of cement ash residue in the cement ash tank. When the control system calculates that the height of the cement ash residue is lower than the set value, the control system controls the discharge switch to gradually close. When the height of the cement ash residue is 0, the discharge switch of the discharge port valve is completely closed.

[0020] A further improvement of the present invention is:

[0021] The control system comprises:

[0022] A wireless data receiving module, connected to the wireless data sending module by signal, and used for receiving the monitoring data sent by the wireless data sending module;

[0023] The data processing module is connected to the wireless data receiving module and calculates the amount of residual ash and the volume of residual cement slurry in the cement ash tank according to the received monitoring data;

[0024] The judgment control module is connected to the data processing module and also connected to the discharge switch signal. According to the calculation result of the data processing module, the opening or closing of the discharge switch is controlled, and then the gradual opening and closing of the discharge valve is controlled, thereby controlling the discharge flow rate.

[0025] A further improvement of the present invention is:

[0026] The data processing module calculates the amount of residual ash and the volume of residual cement slurry in the cement ash tank according to the received monitoring data, specifically:

[0027] When the cement ash tank body is a cylindrical structure, the calculation formula for the remaining ash volume and the remaining cement slurry volume in the cement ash tank is:

[0028] M=ρv

[0029] V=yM

[0030] in, The distance between the cement ash-air interface and the radar level meter monitored by the radar level meter v is the remaining volume of cement ash in the cement ash tank, H is the internal height of the cement ash tank, S is the internal bottom area of ​​the cement ash tank, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry making rate, and V is the volume of the remaining cement slurry.

[0031] A further improvement of the present invention is:

[0032] The data processing module calculates the amount of residual ash and the volume of residual cement slurry in the cement ash tank according to the received monitoring data, specifically:

[0033] When the upper part of the cement ash tank is a cylindrical structure and the lower part is a cone, the calculation formula for the remaining ash volume and cement slurry volume in the cement ash tank is:

[0034] ① When the distance between the cement ash-air interface monitored by the radar level meter and the radar level meter When it is less than h2:

[0035]

[0036] M=ρv

[0037] V=yM

[0038] Among them, h1 is the height of the conical part of the cement ash tank, h2 is the height of the cylindrical structure part of the cement ash tank, is the distance between the cement ash-air interface monitored by the radar level meter and the radar level meter, v is the remaining volume of cement ash in the cement ash tank, S1 is the cross-sectional area of ​​the upper cylinder of the cement ash tank, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry rate, and V is the volume of the remaining cement slurry;

[0039] ② When the distance between the cement ash-air interface monitored by the radar level meter and the radar level meter When greater than h2:

[0040]

[0041] M=ρv

[0042] V=yM

[0043] Among them, h1 is the height of the conical part of the cement ash tank, h2 is the height of the cylindrical part of the cement ash tank, is the distance between the cement ash-air interface monitored by the radar material (liquid) level meter and the radar material (liquid) level meter, d is the diameter of the cement ash-air interface monitored by the radar material (liquid) level meter, v is the remaining volume of cement ash in the cement ash tank, H is the total height inside the cement ash tank, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry making rate, and V is the volume of the remaining cement slurry.

[0044] A second aspect of the present invention provides a method for monitoring the amount of residual ash in a cement ash tank, the method being implemented using the monitoring device described above, and specifically comprising:

[0045] The radar level meter monitors the cement ash-air interface inside the cement ash tank in real time and obtains the distance between the cement ash-air interface and the radar level meter. The data is transmitted to the control system through a wireless data transmission module, and the control system calculates the amount of remaining ash in the cement ash tank, thereby obtaining the remaining cement slurry volume.

[0046] The third aspect of the present invention is a cement ash tank automatic emptying device, comprising:

[0047] Multiple cement ash tanks, each of which is provided with a radar material (liquid) level meter on the top, a discharge port on the bottom, an automatic valve structure on the discharge port, and each of which is connected to a cement pump truck through a high-pressure pipeline;

[0048] The control system is connected to the radar material (liquid) level meter and the automatic valve structure respectively, and is used to receive the monitoring data transmitted by the radar material (liquid) level meter and obtain the remaining ash amount in the cement ash tank by calculation. It is also used to control the gradual closing or complete closing of the automatic valve structure on one of the cement ash tanks, while controlling the gradual opening or complete opening of the automatic valve structure of another cement ash tank that has not been used.

[0049] A fourth aspect of the present invention provides a method for automatically emptying a cement ash tank, comprising:

[0050] First, open the automatic valve structure on the discharge port of the first cement ash tank, and close the automatic valve structures on the discharge ports of the other cement ash tanks. Use the radar level meter installed on the top of the cement ash tank to monitor the cement ash-air interface inside the cement ash tank, and use the distance between the obtained cement ash-air interface and the radar level meter to measure the distance between the cement ash-air interface and the radar level meter. And transmit it to the control system. When the control system calculates that the height of the cement ash remaining in the first cement ash tank is lower than the set height, the control system controls the automatic valve structure to gradually close, and at the same time controls the automatic valve structure of another unused cement ash tank to gradually open. When the height of the cement ash remaining in the first cement ash tank is 0, its automatic valve structure is completely closed, and at the same time, the automatic valve structure on the other unused cement ash tank is completely opened, thereby realizing the automatic emptying operation of the cement ash tank.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] The present invention provides a cement ash tank residual ash amount monitoring device, automatic tank emptying equipment and method, which can realize automatic real-time monitoring and calculation of cement ash residue and cement slurry volume in the cement ash tank during cementing construction, and realize automatic tank emptying operation of the cement ash tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of a device for monitoring the amount of residual ash in a cement ash tank according to the present invention;

[0054] Figure 2 It is a structural schematic diagram of another device for monitoring the amount of residual ash in a cement ash tank according to the present invention;

[0055] Figure 3 When the bottom of the cement ash tank is conical, the distance between the cement ash-air interface monitored by the radar (liquid) level meter and the radar (liquid) level meter The structural diagram is smaller than the height h2 of the cylindrical part of the cement ash tank;

[0056] Figure 4 When the bottom of the cement ash tank is conical, the distance between the cement ash-air interface monitored by the radar (liquid) level meter and the radar (liquid) level meter Structural diagram of the cylindrical part that is larger than the height h2 of the cement ash tank.

[0057] In the figure, 1. cement ash tank, 2. radar material (liquid) level meter, 3. wireless data transmission module, 4. anti-packaging power supply module, 5. resistor, 6. discharge port, 7. automatic valve structure. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0059] The present invention provides a cement ash tank residual ash amount monitoring device, automatic tank emptying equipment and method, which can accurately measure the cement ash residual amount in the cement tank; by monitoring the cement ash residual ash amount in the cement tank, the function of automatically replacing the cement tank during cementing construction is realized, thereby enhancing the automation degree of cementing construction.

[0060] The specific embodiments of the present invention are as follows:

[0061] [Example 1]

[0062] The cement ash tank residual ash amount monitoring device, such as Figure 1 and Figure 2 As shown, including:

[0063] A cement ash tank 1, a radar material (liquid) level meter 2 is arranged on the top of the cement ash tank 1, a discharge port 6 is arranged on the bottom of the cement ash tank 1, and an automatic valve structure 7 is arranged on the discharge port 6;

[0064] The control system is connected to the radar material (liquid) level meter 2 and the automatic valve structure 7, respectively, and is used to receive the monitoring data transmitted by the radar material (liquid) level meter 2 and obtain the remaining ash amount in the cement ash tank by calculation, and control the gradual opening or closing of the automatic valve structure 7 according to the remaining ash amount, thereby controlling the discharge flow rate.

[0065] [Example 2]

[0066] The radar (liquid) level meter 2 is connected to the cement ash tank 1 through a flange;

[0067] like Figure 1 As shown, when the cement ash tank 1 has a cylindrical structure, the radar material (liquid) level meter 2 is installed at 1 / 4 to 1 / 6 of the diameter of the cement ash tank 1, and the minimum distance from the cement ash tank 1 wall is not less than 200 mm.

[0068] like Figure 2 As shown, when the upper part of the cement ash tank 1 is a cylindrical structure and the lower part is a cone, the radar material (liquid) level meter 2 can be installed in the middle of the top of the cement ash tank 1 to ensure that the bottom of the cone is measured.

[0069] Radar (liquid) level meter 2 adopts high-performance radar (liquid) level meter. This type of radar (liquid) level meter has the characteristics of good sealing and accurate measurement. It can be used in solid materials, strong dust, easy crystallization, condensation and other occasions. The measurement range can reach more than 50m, and the measurement accuracy is ±20mm. It is mainly used for distance measurement, liquid level or material level.

[0070] The radar (liquid) level meter 2 is provided with a wireless data transmission module 3 for transmitting the monitored data to the control system.

[0071] During the cementing construction process, the radar material (liquid) level meter 2 located at the top of the cement ash tank 1 monitors the position of the cement ash-air interface inside the cement ash tank 1 in real time, and the distance between the obtained cement ash-air interface and the radar material (liquid) level meter 2 is The data is transmitted to the control system through the wireless data transmission module 3 , and the control system calculates the real-time weight of the remaining cement ash in the cement ash tank 1 , and then obtains the volume of the remaining cement slurry.

[0072] like Figure 1 and Figure 2 As shown, the radar object (liquid) level meter 2 is connected to the explosion-proof power supply module through a wire, and a resistor is connected to the wire.

[0073] [Example 3]

[0074] like Figure 3 As shown, the automatic valve structure 7 includes a discharge valve arranged in the discharge port 6, and a discharge switch is arranged on the discharge port valve, and the discharge switch is connected to the control system. The control system controls the gradual opening or closing of the discharge switch according to the level of cement ash residue in the cement ash tank. When the control system calculates that the height of the cement ash residue is lower than the set value, the control system controls the discharge switch to be gradually closed. When the height of the cement ash residue is 0, the discharge switch of the discharge port valve is completely closed.

[0075] The discharge switch is an automatic switch device.

[0076] [Example 4]

[0077] The control system includes:

[0078] The wireless data receiving module is connected to the wireless data sending module 3 by signal, and is used to receive the monitoring data sent by the wireless data sending module 3;

[0079] The data processing module is connected to the wireless data receiving module and calculates the amount of residual ash in the cement ash tank according to the received monitoring data;

[0080] The judgment control module is connected to the data processing module and also connected to the discharge switch signal. According to the calculation result of the data processing module, the discharge switch is controlled to be gradually opened or closed, thereby controlling the gradual opening and closing of the discharge valve and controlling the discharge flow rate.

[0081] The data processing module calculates the amount of remaining ash in the cement ash tank based on the received monitoring data, specifically:

[0082] When the cement ash tank 1 has a cylindrical structure, the calculation formula for the remaining ash amount and cement slurry volume in the cement ash tank 1 is:

[0083]

[0084] M=ρv (2)

[0085] V=yM (3)

[0086] in, The distance between the cement ash-air interface monitored by the radar level meter 2 and the radar level meter 2 v is the remaining volume of cement ash in cement ash tank 1, H is the internal height of cement ash tank 1, S is the internal bottom area of ​​cement ash tank 1, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the density of cement ash, y is the slurry making rate, and V is the remaining cement slurry volume;

[0087] When the upper part of the cement ash tank 1 is a cylindrical structure and the bottom is conical, the calculation formula for the remaining ash amount and cement slurry volume in the cement ash tank 1 is:

[0088] ① When the distance between the cement ash-air interface monitored by radar level meter 2 and radar level meter 2 When it is less than h2:

[0089]

[0090] M=ρv (2)

[0091] V=yM (3)

[0092] Among them, h1 is the height of the conical part of the cement ash tank, h2 is the height of the cylindrical structure part of the cement ash tank, is the distance between the cement ash-air interface monitored by the radar level meter 2 and the radar level meter 2, v is the remaining volume of cement ash in the cement ash tank 1, S1 is the cross-sectional area of ​​the upper cylinder structure of the cement ash tank 1, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry making rate, and V is the remaining cement slurry volume;

[0093] ② When the distance between the cement ash-air interface monitored by radar level meter 2 and radar level meter 2 When greater than h2:

[0094]

[0095] M=ρv (2)

[0096] V=yM (3)

[0097] Among them, h1 is the height of the conical part of the cement ash tank, h2 is the height of the cylindrical structure part of the cement ash tank, is the distance between the cement ash-air interface monitored by the radar (liquid) level meter 2 and the radar (liquid) level meter 2, d is the diameter of the cement ash-air interface monitored by the radar (liquid) level meter 2, v is the remaining volume of cement ash in the cement ash tank 1, H is the total height inside the cement ash tank 1, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry making rate, and V is the remaining cement slurry volume.

[0098] [Example 5]

[0099] The present invention further provides a method for monitoring the amount of residual ash in a cement ash tank, which is implemented by using the monitoring device described in the above embodiments 1-4, and specifically includes:

[0100] During the cementing construction process, the radar material (liquid) level meter 2 located at the top of the cement ash tank 1 monitors the cement ash-air interface inside the cement ash tank 1 in real time, and the distance between the obtained cement ash-air interface and the radar material (liquid) level meter 2 is The data is transmitted to the control system through the wireless data transmission module 3, and the control system 12 can calculate the amount of remaining ash in the cement ash tank 1 through a formula, and then obtain the volume of cement slurry;

[0101] When the body of cement ash tank 1 is cylindrical, the calculation formula for the amount of remaining ash and cement slurry volume in cement ash tank 1 is:

[0102]

[0103] M=ρv (2)

[0104] V=yM (3)

[0105] in, The distance between the cement ash-air interface monitored by the radar level meter 2 and the radar level meter 2 v is the remaining volume of cement ash in cement ash tank 1, H is the internal height of cement ash tank 1, S is the internal bottom area of ​​cement ash tank 1, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the density of cement ash, y is the slurry making rate, and V is the remaining cement slurry volume;

[0106] When the upper part of the cement ash tank 1 is a cylindrical structure and the bottom is conical, the calculation formula for the remaining ash amount and cement slurry volume in the cement ash tank 1 is:

[0107] ① When the distance between the cement ash-air interface monitored by radar level meter 2 and radar level meter 2 When it is less than h2:

[0108]

[0109] M=ρv (2)

[0110] V=yM (3)

[0111] Among them, h1 is the height of the conical part of the cement ash tank, h2 is the height of the cylindrical part of the cement ash tank, is the distance between the cement ash-air interface monitored by the radar level meter 2 and the radar level meter 2, v is the remaining volume of cement ash in the cement ash tank 1, S1 is the cross-sectional area of ​​the upper cylinder of the cement ash tank 1, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry making rate, and V is the remaining cement slurry volume;

[0112] ② When the distance between the cement ash-air interface monitored by radar level meter 2 and radar level meter 2 When greater than h2:

[0113]

[0114] M=ρv (2)

[0115] V=yM (3)

[0116] Among them, h1 is the height of the conical part of the cement ash tank, h2 is the height of the cylindrical structure part of the cement ash tank, is the distance between the cement ash-air interface monitored by the radar (liquid) level meter 2 and the radar (liquid) level meter 2, d is the diameter of the cement ash-air interface monitored by the radar (liquid) level meter 2, v is the remaining volume of cement ash in the cement ash tank 1, H is the total height inside the cement ash tank 1, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry making rate, and V is the remaining cement slurry volume.

[0117] [Example 6]

[0118] The present invention also provides a cement ash tank automatic emptying device, comprising:

[0119] Multiple cement ash tanks, each of which is provided with a radar material (liquid) level meter on the top, a discharge port on the bottom, an automatic valve structure on the discharge port, and each of which is connected to a cement pump truck through a high-pressure pipeline;

[0120] The control system is connected to the radar material (liquid) level meter and the automatic valve structure respectively, and is used to receive the monitoring data transmitted by the radar material (liquid) level meter and obtain the remaining ash amount in the cement ash tank by calculation, and is also used to control the gradual closing or complete closing of the discharge switch on one of the cement ash tanks, while controlling the gradual opening or complete opening of the discharge switch of another cement ash tank that has not been used.

[0121] [Example 7]

[0122] The present invention also provides a method for automatically emptying a cement ash tank, comprising:

[0123] First, the automatic valve structure on the discharge port of the first cement ash tank is opened, and the automatic valve structures on the discharge ports of the other cement ash tanks are closed. The internal cement ash-air interface of the cement ash tank is monitored by the radar (liquid) level meter 2 set on the top of the cement ash tank, and the distance between the obtained cement ash-air interface and the radar (liquid) level meter 2 is measured. And transmit it to the control system. When the control system calculates that the height of the cement ash remaining in the first cement ash tank is lower than the set height, the control system controls the discharge switch to gradually close, and at the same time controls the discharge switch of another unused cement ash tank to gradually open. When the height of the cement ash remaining in the first cement ash tank is 0, its automatic valve structure is completely closed, and at the same time, the discharge switch on the other unused cement ash tank is completely opened, thereby realizing the automatic emptying operation of the cement ash tank.

[0124] The automatic emptying method of cement ash tank is specifically described below by taking a specific example.

[0125] During the construction process, the discharge port valve of cement ash tank A is opened to supply cement to the cement pump truck, and the discharge port valves of other cement ash tanks are closed. As the construction progresses, the cement ash residual interface measured by the radar material (liquid) level meter 2 of cement ash tank A gradually decreases, and the wireless data transceiver module 3 sends the obtained data to the wireless data transceiver module 11, and then the control system processes it. When the height of the cement ash residual in cement ash tank A is lower than 0.5 meters (set value), the automatic valve structure 7 of cement ash tank A will receive instructions, and the discharge port valve will be gradually closed through the discharge switch control, and the automatic valve decoupling unit 7 of the spare cement ash tank B will receive instructions, and the discharge port valve will be gradually opened; when the height of the cement ash residual in cement ash tank A is 0, the discharge port valve of cement ash tank A is completely closed, and the discharge port valve of the spare cement ash tank B is completely opened, thereby completing the automatic cement ash tank emptying operation during the cementing construction process, so that the cement supply process of cementing construction is stable and continuous.

[0126] The present invention provides a cement ash tank residual ash amount monitoring device, automatic tank emptying equipment and method, which can realize automatic real-time monitoring and calculation of cement ash residue and cement slurry volume in the cement ash tank during cementing construction, and realize automatic tank emptying operation of the cement ash tank.

[0127] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0128] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0129] The above technical solution is only one implementation mode of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the present invention, and it is not limited to the technical solution described in the above specific embodiments of the present invention. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. A cement ash tank residual ash amount monitoring device, characterized in that: include: A cement ash tank, wherein a radar material (liquid) level meter is arranged on the top of the cement ash tank, a discharge port is arranged at the bottom of the cement ash tank, and an automatic valve structure is arranged on the discharge port; The control system is connected with the radar object (liquid) level meter and the automatic valve structure respectively.

2. The device for monitoring the amount of residual ash in a cement ash tank according to claim 1, characterized in that: The radar (liquid) level meter is connected to the cement ash tank via a flange; and / or, When the cement ash tank body is a cylindrical structure, the radar level meter is installed at 1 / 4 to 1 / 6 of the cement ash tank diameter, and the minimum distance from the cement ash tank wall is not less than 200 mm; and / or, When the upper part of the cement ash tank is a cylindrical structure and the lower part is a cone, the radar (liquid) level meter is installed in the middle of the top of the cement ash tank.

3. The device for monitoring the amount of residual ash in a cement ash tank according to claim 1, characterized in that: The radar object (liquid) level meter is provided with a wireless data transmission module for transmitting the monitored data to the control system.

4. The device for monitoring the amount of residual ash in a cement ash tank according to claim 1 or 3, characterized in that: The automatic valve structure comprises a discharge valve arranged on the discharge port, a discharge switch is arranged on the discharge port valve, and the discharge switch is connected to the control system; The control system controls the gradual opening or closing of the discharge switch according to the level of cement ash residue in the cement ash tank. When the control system calculates that the height of the cement ash residue is lower than the set value, the control system controls the discharge switch to gradually close. When the height of the cement ash residue is 0, the discharge switch of the discharge port valve is completely closed.

5. The device for monitoring the amount of residual ash in a cement ash tank according to claim 4, characterized in that: The control system comprises: A wireless data receiving module, connected to the wireless data sending module by signal, and used for receiving the monitoring data sent by the wireless data sending module; The data processing module is connected to the wireless data receiving module and calculates the amount of residual ash and the volume of residual cement slurry in the cement ash tank according to the received monitoring data; The judgment control module is connected to the data processing module and also connected to the discharge switch signal. According to the calculation result of the data processing module, the opening or closing of the discharge switch is controlled, and then the gradual opening and closing of the discharge valve is controlled, thereby controlling the discharge flow rate.

6. The device for monitoring the amount of residual ash in a cement ash tank according to claim 5, characterized in that: The data processing module calculates the amount of residual ash and the volume of residual cement slurry in the cement ash tank according to the received monitoring data, specifically: When the cement ash tank body is a cylindrical structure, the calculation formula for the remaining ash volume and the remaining cement slurry volume in the cement ash tank is: M=ρv V=yM in, The distance between the cement ash-air interface and the radar level meter monitored by the radar level meter v is the remaining volume of cement ash in the cement ash tank, H is the internal height of the cement ash tank, S is the internal bottom area of ​​the cement ash tank, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry making rate, and V is the volume of the remaining cement slurry.

7. The device for monitoring the amount of residual ash in a cement ash tank according to claim 5, characterized in that: The data processing module calculates the amount of residual ash and the volume of residual cement slurry in the cement ash tank according to the received monitoring data, specifically: When the upper part of the cement ash tank is a cylindrical structure and the lower part is a cone, the calculation formula for the remaining ash volume and cement slurry volume in the cement ash tank is: ① When the distance between the cement ash-air interface monitored by the radar level meter and the radar level meter When it is less than h2: M=ρv V=yM Among them, h1 is the height of the conical part of the cement ash tank, h2 is the height of the cylindrical structure part of the cement ash tank, is the distance between the cement ash-air interface monitored by the radar level meter and the radar level meter, v is the remaining volume of cement ash in the cement ash tank, S1 is the cross-sectional area of ​​the upper cylinder of the cement ash tank, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry rate, and V is the volume of the remaining cement slurry; ② When the distance between the cement ash-air interface monitored by the radar level meter and the radar level meter When greater than h2: M=ρv V=yM Among them, h1 is the height of the conical part of the cement ash tank, h2 is the height of the cylindrical part of the cement ash tank, is the distance between the cement ash-air interface monitored by the radar material (liquid) level meter and the radar material (liquid) level meter, d is the diameter of the cement ash-air interface monitored by the radar material (liquid) level meter, v is the remaining volume of cement ash in the cement ash tank, H is the total height inside the cement ash tank, M is the real-time weight of the remaining cement ash in the cement ash tank, ρ is the cement ash density, y is the slurry making rate, and V is the volume of the remaining cement slurry.

8. A method for monitoring the amount of residual ash in a cement ash tank, characterized in that: The method is implemented by using the monitoring device according to any one of claims 1 to 8, and specifically comprises: The radar (liquid) level meter monitors the cement ash-air interface inside the cement ash tank in real time, obtains the distance between the cement ash-air interface and the radar (liquid) level meter, and transmits it to the control system through the wireless data sending module. The control system calculates the remaining ash amount in the cement ash tank and then obtains the remaining cement slurry volume.

9. An automatic cement ash tank emptying device, characterized in that: include: Multiple cement ash tanks, each of which is provided with a radar material (liquid) level meter on the top, a discharge port on the bottom, an automatic valve structure on the discharge port, and each of which is connected to a cement pump truck through a high-pressure pipeline; The control system is connected to the radar material (liquid) level meter and the automatic valve structure respectively, and is used to receive the monitoring data transmitted by the radar material (liquid) level meter and obtain the remaining ash amount in the cement ash tank by calculation. It is also used to control the gradual closing or complete closing of the automatic valve structure on one of the cement ash tanks, while controlling the gradual opening or complete opening of the automatic valve structure of another cement ash tank that has not been used.

10. A method for automatically emptying a cement ash tank, characterized in that: include: First, open the automatic valve structure on the discharge port of the first cement ash tank, and close the automatic valve structures on the discharge ports of the other cement ash tanks. Use the radar level meter installed on the top of the cement ash tank to monitor the cement ash-air interface inside the cement ash tank, and use the distance between the obtained cement ash-air interface and the radar level meter to measure the distance between the cement ash-air interface and the radar level meter. And transmit it to the control system. When the control system calculates that the height of the cement ash remaining in the first cement ash tank is lower than the set height, the control system controls the automatic valve structure to gradually close, and at the same time controls the automatic valve structure of another unused cement ash tank to gradually open. When the height of the cement ash remaining in the first cement ash tank is 0, its automatic valve structure is completely closed, and at the same time, the automatic valve structure on the other unused cement ash tank is completely opened, thereby realizing the automatic emptying operation of the cement ash tank.

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