Air pressure and cement ash double-regulation ash conveying device

Abstract

The air pressure and cement ash double-regulation ash conveying device comprises a tank body, the tank body is installed on a base through a support structure at the bottom, a weighing sensor is further arranged between the support structure and the base, the weighing sensor is connected with a control system, an ash inlet pipeline and an ash outlet pipeline are respectively arranged on the side wall of the tank body, a proportional ash regulating valve is installed on the ash inlet pipeline close to the side wall of the tank body, the proportional ash regulating valve is connected with the control system through an electric actuator, and a pressure regulating device is arranged at the top of the tank body; the pressure in the tank body is accurately controlled through the pressure regulating device, so that the pressure fluctuation in the tank body is small during the ash conveying process, the ash inlet amount of the tank body is regulated through the proportional ash regulating valve, so that the weight of the cement ash in the tank body is in a stable state, the uniform conveying of the cement ash is ensured, and favorable conditions are created for the accurate metering of the cement ash by the subsequent mixer.

Description

Technical Field

[0001] This invention belongs to the technical field of cementing ash supply equipment, and relates to a dual-regulation ash conveying device for air pressure and cement ash. Background Technology

[0002] During oilfield cementing, pressurized gas is introduced into the cement ash tank to fluidize the cement ash, allowing it to be efficiently transported through pipelines like a fluid. However, with increasing pipeline distance or the number of bends, the flow loss along the conveying path increases, the kinetic energy of the fluidized cement ash gradually diminishes, and the conveying pressure fluctuates frequently. As the kinetic energy continuously decreases, the cement ash gradually settles within the pipeline, reducing conveying efficiency and even clogging the pipeline. Simultaneously, the fluctuations in conveying pressure make accurate metering of the cement ash in the downstream mixer very difficult, affecting the precise mixing of cement slurry density. To address the issue of kinetic energy attenuation and eliminate pressure fluctuations, a common practice is to add a buffer tank near the mixer at the rear end of the conveying pipe, introducing a certain pressure into the buffer tank to re-fluidize the cement ash, restoring its kinetic energy and simultaneously eliminating some of the pressure fluctuations.

[0003] After the above measures were implemented, the ash conveying effect was improved to some extent, but the pressure inside the buffer tank was still uncontrollable and the pressure fluctuation inside the tank was large. Although a pressure stabilizing valve was installed, the existing pressure stabilizing valve only played a role in limiting high pressure, and various fluctuations in pressure below the threshold could not be eliminated well. In addition, the amount of ash entering the buffer tank was also uncontrolled, which caused the uniformity of cement ash in the process from the buffer tank to the mixer to still have a large variation, affecting the mixing density of the cement slurry. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-regulating ash conveying device for air pressure and cement ash, which features small pressure fluctuations within the tank during the ash conveying process.

[0005] The technical solution adopted in this invention is a dual-regulating ash conveying device for air pressure and cement ash, including a tank body. The bottom of the tank body is mounted on a base through a support structure. A weighing sensor is also installed between the support structure and the base. The weighing sensor is connected to a control system. An ash inlet pipe and an ash outlet pipe are respectively installed on the side wall of the tank body. A proportional ash regulating valve is installed on the ash inlet pipe near the side wall of the tank body. The proportional ash regulating valve is also connected to the control system through an electric actuator. A pressure regulating device is installed on the top of the tank body.

[0006] The invention is further characterized by:

[0007] The upper half of the tank is cylindrical, and the lower half is funnel-shaped. Observation holes are provided on the side walls of the upper half of the tank. The ash inlet pipe and ash outlet pipe are both located in the upper half of the tank. Manholes and fluidization devices are provided on the side walls of the lower half of the tank. There are at least three fluidization devices, which are evenly distributed around the tank.

[0008] The support structure consists of three legs arranged in a triangular shape. The top of each leg is fixed to the tank body, and the bottom of each leg is fixed to the base via a weighing sensor. Each weighing sensor is electrically connected to the control system.

[0009] Both the ash discharge pipe and the ash inlet pipe are connected to the inside of the tank at one end. The other end of the ash inlet pipe is equipped with multiple interfaces, and the other end of the ash discharge pipe is connected to a joint. A second butterfly valve is installed on the ash discharge pipe. The ash discharge pipe and the ash inlet pipe are connected through an emergency pipe, and a third butterfly valve is installed in the middle of the emergency pipe.

[0010] The fitting can be either a single-ended large-diameter fitting or a multi-ended small-diameter fitting.

[0011] The control system includes a controller, which is connected to a display, a weighing signal conversion device, and an electric actuator. The signal receiving end of the weighing signal conversion device is connected to the weighing sensor through a junction box.

[0012] The pressure regulating device includes a pressure regulating connecting pipe. One end of the pressure regulating connecting pipe is connected to the top of the tank. A pressure gauge is installed on the pressure regulating connecting pipe. The other end of the pressure regulating connecting pipe is connected to a four-way pipe. The other three ports of the four-way pipe are respectively connected to a downstream pressure regulating valve, a upstream pressure regulating valve, and a vent pipe. The downstream pressure regulating valve and the upstream pressure regulating valve are arranged opposite to each other. A fourth butterfly valve is installed at the inlet end of the upstream pressure regulating valve. The outlet end of the upstream pressure regulating valve is connected to one end of a pressure relief pipe. The other end of the pressure relief pipe is connected to the vent pipe. A fifth butterfly valve is installed between the vent pipe and the four-way pipe.

[0013] The proportional ash regulating valve includes a valve body with an end face connection flange at the top. The valve body is matched and connected to the flange connection end cover through the end face connection flange. A through hole is opened in the middle of the flange connection end cover. A valve core is installed inside the valve body, and an electric actuator is connected to the valve core through the through hole.

[0014] The valve body includes a valve body shell, which is cylindrical. The top of the valve body shell is provided with an end face connection flange, and the bottom of the valve body shell is an ash inlet. The ash inlet is connected to the ash inlet pipe through a first butterfly valve. The inner wall of the valve body shell is provided with a step that limits the valve core. A first rectangular ash outlet is provided on the side wall of the valve body shell. The included angle between the two vertical sides of the first rectangular ash outlet is 90°. The side wall of the valve body shell is also provided with a valve body ash outlet pipe that cooperates with the first rectangular ash outlet. The valve body ash outlet pipe includes a rectangular cross-section ash outlet pipe. One end of the rectangular cross-section ash outlet pipe is fixed to the side wall of the valve body shell, and the other end of the rectangular cross-section ash outlet pipe is connected to a circular cross-section ash outlet pipe. The circular cross-section ash outlet pipe is connected to the tank body, and the outlet direction of the circular cross-section ash outlet pipe is tangent to the cylindrical surface of the tank body.

[0015] The valve core has a cylindrical structure and is located inside the valve body. A first groove and a second groove are respectively opened around the outer wall of the valve core. A first sealing ring and a second sealing ring are installed in the first groove and the second groove respectively. A second rectangular ash outlet is opened on the side wall of the valve core. The second rectangular ash outlet matches the first rectangular ash outlet. The included angle between the two vertical sides of the second rectangular ash outlet is 90°. An actuator connection hole is opened on the top of the valve core. The valve core is connected to the electric actuator through the actuator connection hole.

[0016] The beneficial effects of this invention are:

[0017] (1) The air pressure and cement ash dual-regulation ash conveying control device of the present invention uses a pressure regulating device to accurately control the pressure inside the tank. When the pressure inside the tank is lower than the set value, the pressure regulating valve after the valve automatically opens, and the air source enters the tank to replenish the pressure. When the pressure inside the tank is higher than the set value, the pressure regulating valve before the valve automatically opens, and the high pressure is automatically unloaded. The pressure inside the tank can always be kept constant, so that the pressure fluctuation inside the tank is small during the ash conveying process.

[0018] (2) The dual-regulation ash conveying control device of the present invention monitors the weight of cement ash in the tank through the control system and adjusts the amount of ash fed into the tank by using a proportional ash regulating valve, so that the weight of cement ash in the tank is kept stable, ensuring uniform conveying of cement ash and creating favorable conditions for accurate metering of cement ash by the subsequent mixer. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the dual-regulation ash conveying control device for air pressure and cement ash of the present invention;

[0020] Figure 2 This is a top view of the dual-regulation ash conveying control device for air pressure and cement ash of the present invention;

[0021] Figure 3 This is a side view of the dual-regulation ash conveying control device for air pressure and cement ash of the present invention;

[0022] Figure 4 This is a schematic diagram of the proportional ash regulating valve in the dual-regulation ash conveying control device for air pressure and cement ash of the present invention;

[0023] Figure 5 This is a schematic diagram of the valve body in the dual-regulation ash conveying control device for air pressure and cement ash of the present invention;

[0024] Figure 6 yes Figure 5 Sectional view along the BB direction;

[0025] Figure 7 This is a schematic diagram of the valve core in the dual-regulation ash conveying control device for air pressure and cement ash of the present invention;

[0026] Figure 8This is a top view of the valve core in the dual-regulation ash conveying control device for air pressure and cement ash of the present invention;

[0027] Figure 9 yes Figure 7 A sectional view along the DD direction.

[0028] In the diagram, 1. Tank body, 2. Observation hole, 3. Ash discharge pipe, 4. Ash inlet pipe, 5. Base, 6. Weighing sensor;

[0029] 7. Proportional ash regulating valve; 701. Valve body; 7011. Valve body shell; 7012. Ash inlet; 7013. First rectangular ash outlet; 7014. Rectangular cross-section ash outlet pipe; 7015. Circular cross-section ash outlet pipe; 7016. Step;

[0030] 702. End face connection flange; 703. Flange connection end cover;

[0031] 704. Valve core; 7041. First groove; 7042. Second groove; 7043. First sealing ring; 7044. Second sealing ring; 7045. Second rectangular ash outlet; 7046. Connecting hole;

[0032] 8. Control system; 801. Display; 802. Controller; 803. Weighing signal conversion device; 804. Junction box;

[0033] 9. Fluidizing device; 10. First butterfly valve; 11. Manhole; 12. Electric actuator; 13. Second butterfly valve; 14. Third butterfly valve; 15. Single-head large-diameter connector; 16. Multi-head small-diameter connector; 17. Pressure regulating connection pipe; 18. Pressure gauge; 19. Pre-valve pressure regulating valve; 20. Fourth butterfly valve; 21. Pressure relief pipe; 22. Post-valve pressure regulating valve; 23. Fifth butterfly valve; 24. Drain pipe; 25. Support leg. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0035] This invention relates to a dual-regulating ash conveying device for both air pressure and cement ash, such as... Figure 1As shown, the system includes a tank 1. The bottom of the tank 1 is mounted on a base 5 via a support structure. A weighing sensor 6 is installed between the support structure and the base 5. The weighing sensor 6 is connected to a control system 8. The weighing sensor 6 weighs the cement inside the tank 1 and transmits the weight data to the control system 8, enabling real-time monitoring of the cement weight inside the tank 1. An inlet pipe 4 and an outlet pipe 3 are respectively installed on the side wall of the tank 1. Cement ash is filled into the tank 1 through the inlet pipe 4 and then discharged through the outlet pipe 3. A proportional ash regulating valve 7 is installed on the inlet pipe 4 near the side wall of the tank 1. The proportional ash regulating valve 7 is connected to the control system 8 via an electric actuator 12. The proportional ash regulating valve 7 adjusts the amount of cement ash entering the tank 1 in real time, ensuring that the weight of cement ash inside the tank 1 remains dynamically stable and guaranteeing uniform delivery of cement ash within the pipes. A pressure regulating device is installed on the top of the tank 1.

[0036] The upper half of the tank body 1 is cylindrical, and the lower half of the tank body 1 is funnel-shaped. An observation hole 2 is provided on the side wall of the upper half of the tank body 1. The ash inlet pipe 4 and the ash outlet pipe 3 are both located in the upper half of the tank body 1. A manhole 11 and a fluidizing device 9 are respectively provided on the side wall of the lower half of the tank body 1. There are at least three fluidizing devices 9, which are evenly distributed around the tank body 1. The fluidizing devices 9 can make the cement ash fluidized more fully.

[0037] The support structure consists of three legs 25, which are arranged in a triangular shape. The top of each leg 25 is fixed to the tank body 1, and the bottom of each leg 25 is fixed to the base 5 through a weighing sensor 6. Each weighing sensor 6 is electrically connected to the control system 8.

[0038] The control system 8 includes a controller 802, which is connected to a display 801, a weighing signal conversion device 803 and an electric actuator 12. The signal receiving end of the weighing signal conversion device 803 is connected to the weighing sensor 6 through a junction box 804.

[0039] Ash discharge pipe 3 and ash inlet pipe 4, such as Figure 2 As shown, one end of the ash discharge pipe 3 and the ash inlet pipe 4 are connected to the inside of the tank body 1. The other end of the ash inlet pipe 4 is provided with multiple interfaces. The other end of the ash discharge pipe 3 is connected to a connector. A second butterfly valve 13 is provided on the ash discharge pipe 3. The ash discharge pipe 3 and the ash inlet pipe 4 are connected through an emergency pipe. A third butterfly valve 14 is provided in the middle of the emergency pipe.

[0040] The connector is either a single-head large-diameter connector 15 or a multi-head small-diameter connector 16. The large-diameter connector 15 is used for a single device that requires a large flow rate of ash supply, while the multi-head small-diameter connector 16 is used for a single or multiple devices that require a small flow rate of ash supply.

[0041] Voltage regulating device, such as Figure 3As shown, the pressure regulating device includes a pressure regulating connecting pipe 17. One end of the pressure regulating connecting pipe 17 is connected to the top of the tank 1, and a pressure gauge 18 is installed on the pressure regulating connecting pipe 17. The pressure inside the tank 1 can be directly observed through the pressure gauge 18. The other end of the pressure regulating connecting pipe 17 is connected to a four-way pipe. The other three ports of the four-way pipe are respectively connected to a downstream pressure regulating valve 22, a upstream pressure regulating valve 19, and a vent pipe 24. The downstream pressure regulating valve 22 and the upstream pressure regulating valve 19 are arranged opposite to each other. The downstream pressure regulating valve 22 is used for low-pressure air replenishment, and the upstream pressure regulating valve 19 is used for high-pressure unloading. A fourth butterfly valve 20 is installed at the inlet end of the front pressure regulating valve 19. The outlet end of the front pressure regulating valve 19 is connected to one end of the pressure relief pipe 21, and the other end of the pressure relief pipe 21 is connected to the vent pipe 24. A fifth butterfly valve 23 is installed between the vent pipe 24 and the four-way pipe. When the pressure inside the tank is lower than the set value, the rear pressure regulating valve 22 automatically opens, and the air source enters the tank 1 to replenish the pressure. When the pressure inside the tank is higher than the set value, the front pressure regulating valve 19 automatically opens, and the high pressure is automatically unloaded. The pressure inside the tank 1 can always be kept constant, so that the pressure fluctuation inside the tank 1 is small during the ash conveying process.

[0042] Proportional ash regulating valve 7, such as Figure 4 As shown, the proportional ash regulating valve 7 includes a valve body 701, with an end face connecting flange 702 at the top of the valve body 701. The valve body 701 is matched and connected to the flange connecting end cover 703 through the end face connecting flange 702. A through hole is opened in the middle of the flange connecting end cover 703. A valve core 704 is provided inside the valve body 701. The electric actuator 12 is connected to the valve core 704 through the through hole. The proportional ash regulating valve 7 is used to regulate the ash feed of the tank 1, so that the weight of cement ash in the tank 1 is kept in a stable state, ensuring the uniform delivery of cement ash and creating favorable conditions for the accurate metering of cement ash by the subsequent mixer.

[0043] Valve body 701, such as Figure 5 and Figure 6As shown, the valve body 701 includes a valve body shell 7011, which is cylindrical. A face-connecting flange 702 is provided at the top of the valve body shell 7011, and an ash inlet 7012 is located at the bottom of the valve body shell 7011. The ash inlet 7012 is connected to the ash inlet pipe 4 via a first butterfly valve 10. A step is provided on the inner wall of the valve body shell 7011 to limit the movement of the valve core 704. A first rectangular ash outlet 7013 is provided on the side wall of the valve body shell 7011, with the included angle between the two vertical sides of the first rectangular ash outlet 7013 being 90°. The wall is also provided with a valve body ash outlet pipe that cooperates with the first rectangular ash outlet 7013. The valve body ash outlet pipe includes a rectangular cross-section ash outlet pipe 7014. One end of the rectangular cross-section ash outlet pipe 7014 is fixed to the side wall of the valve body shell 7011, and the other end of the rectangular cross-section ash outlet pipe 7014 is connected to a circular cross-section ash outlet pipe 7015. The outlet direction of the circular cross-section ash outlet pipe 7015 is tangent to the inner wall of the tank 1, which allows cement ash to enter the tank 1 along the tangential direction and settle quickly along the inner surface of the tank 1 under the action of centrifugal force, effectively improving the cement ash filling efficiency.

[0044] Valve core 704, such as Figure 7 and Figure 8 ,as well as Figure 9 As shown, the valve core 704 has an overall cylindrical structure and is located inside the valve body shell 7011. A first groove 7041 and a second groove 7042 are respectively opened around the outer wall of the valve core 704. A first sealing ring 7043 and a second sealing ring 7044 are matched and installed in the first groove 7041 and the second groove 7042. A second rectangular ash outlet 7045 is opened on the side wall of the valve core 704, which matches the first rectangular ash outlet 7013. The included angle between the two vertical sides of the second rectangular ash outlet 7045 is 90°. By adjusting the rotation angle of the valve core 704, the proportion of the flow area of ​​the first rectangular ash outlet 7013 can be changed. An actuator connection hole 7046 is opened on the top of the valve core 704. The valve core 704 is connected to the electric actuator 12 through the actuator connection hole 7046. The control system 8 controls the rotation of the valve core 704 through the electric actuator 12.

[0045] The working process of the dual-regulation ash conveying control device for air pressure and cement ash of the present invention is as follows:

[0046] Connect the ash outlet pipe of the ash supply equipment to the ash inlet pipe 4, open the first butterfly valve 10, the fourth butterfly valve 20 and the fifth butterfly valve 23, close the second butterfly valve 13 and the third butterfly valve 14, and manually open the proportional ash regulating valve 7; start the ash supply equipment to fill the tank 1 with cement ash; after the gas-ash mixture enters the tank 1 tangentially, it moves downward along the inner surface of the tank under the action of gravity. Due to the centrifugal force, the cement ash particles are thrown towards the tank wall and separated from the gas. The airflow continues to move upward along the central axis of the tank 1 in a spiral motion and is discharged from the vent pipe 24 after passing through the pressure regulating connection pipe 17.

[0047] During the cement ash filling process, the weighing sensors 6 at the bottom of the three support legs transmit the cement ash weight information in the tank in real time to the controller 802 after being converted by the weighing signal conversion device 803, and then displayed on the screen through the display 801. When the cement ash weight reaches the set value, the first butterfly valve 10 and the fifth butterfly valve 23 are closed, the fluidization device 9 is opened to fluidize the cement ash in the tank, and then the air source switch of the pressure regulating valve 22 after the valve is opened to introduce the set air pressure. The first butterfly valve 10 is opened to supply ash to the tank 1, and the second butterfly valve 13 is opened to start discharging ash. The proportional ash regulating valve 7 is controlled by the control system 8. The control system 8 adjusts the valve size of the proportional ash regulating valve 7 according to the dry ash weight in the tank 1 through the electric actuator 12 to control the ash feed rate, so that the cement ash weight in the tank 1 is always maintained within the set range, thereby keeping the density of the fluidized air-ash mixture in the tank 1 constant and ensuring uniform ash conveying from the ash discharge pipe 3 to the mixer.

[0048] Meanwhile, because the cementing equipment mixer needs to precisely control the amount of cement fed during water-cement mixing, the cement supply needs to be uniform and the supply speed stable. The cement supply speed is related to the cement conveying pressure; the higher the pressure, the faster the cement supply speed, and vice versa. To maintain a stable cement supply speed, it is necessary to ensure that the pressure inside the tank 1 is constant. The pressure inside the tank 1 can be directly observed through the pressure gauge 18. When the pressure inside the tank 1 is lower than the set pressure, the downstream pressure regulating valve 22 automatically opens, and the external air source replenishes the tank 1 with air through the pressure regulating connection pipe 17. When the pressure inside the tank reaches the set pressure, the downstream pressure regulating valve 22 closes. When the pressure inside the tank 1 is higher than the set pressure, the upstream pressure regulating valve 19 automatically opens, and the gas inside the tank is discharged from the pressure relief pipe 21 through the pressure regulating connection pipe 17.

[0049] When the ash supply to tank 1 malfunctions and cannot meet the ash supply requirements, the third butterfly valve 14 is opened, and the first butterfly valve 10 and the second butterfly valve 13 are closed. Ash is then supplied directly through the emergency pipeline to ensure the continuity of construction.

[0050] The present invention relates to a dual-regulation ash conveying control device for air pressure and cement ash, and specific embodiments are as follows:

[0051] Example 1

[0052] The present invention relates to a dual-regulating ash conveying device for air pressure and cement ash, comprising a tank body 1. The bottom of the tank body 1 is mounted on a base 5 via a support structure. A weighing sensor 6 is also provided between the support structure and the base 5. The weighing sensor 6 is connected to a control system 8. An ash inlet pipe 4 and an ash outlet pipe 3 are respectively provided on the side wall of the tank body 1. A proportional ash regulating valve 7 is installed on the ash inlet pipe 4 near the side wall of the tank body 1. The proportional ash regulating valve 7 is also connected to the control system 8 via an electric actuator 12. A pressure regulating device is provided on the top of the tank body 1.

[0053] The upper half of the tank body 1 is cylindrical, and the lower half of the tank body 1 is funnel-shaped. An observation hole 2 is provided on the side wall of the upper half of the tank body 1. The ash inlet pipe 4 and the ash outlet pipe 3 are both located in the upper half of the tank body 1. A manhole 11 and a fluidizing device 9 are respectively provided on the side wall of the lower half of the tank body 1. There are at least three fluidizing devices 9 and they are evenly distributed around the tank body 1.

[0054] The support structure consists of three legs arranged in a triangular shape. The top of each leg is fixed to the tank body 1, and the bottom of each leg is fixed to the base 5 via a weighing sensor 6. Each weighing sensor 6 is electrically connected to the control system 8.

[0055] One end of the ash discharge pipe 3 and the ash inlet pipe 4 are connected to the inside of the tank body 1. The other end of the ash inlet pipe 4 is provided with multiple interfaces. The other end of the ash discharge pipe 3 is connected to a connector. A second butterfly valve 13 is installed on the ash discharge pipe 3. The ash discharge pipe 3 and the ash inlet pipe 4 are connected through an emergency pipe. A third butterfly valve 14 is installed in the middle of the emergency pipe.

[0056] The fitting is either a single-head large-diameter fitting 15 or a multi-head small-diameter fitting 16.

[0057] Example 2

[0058] The present invention relates to a dual-regulating ash conveying device for air pressure and cement ash, comprising a tank body 1. The bottom of the tank body 1 is mounted on a base 5 via a support structure. A weighing sensor 6 is also provided between the support structure and the base 5. The weighing sensor 6 is connected to a control system 8. An ash inlet pipe 4 and an ash outlet pipe 3 are respectively provided on the side wall of the tank body 1. A proportional ash regulating valve 7 is installed on the ash inlet pipe 4 near the side wall of the tank body 1. The proportional ash regulating valve 7 is also connected to the control system 8 via an electric actuator 12. A pressure regulating device is provided on the top of the tank body 1.

[0059] The upper half of the tank body 1 is cylindrical, and the lower half of the tank body 1 is funnel-shaped. An observation hole 2 is provided on the side wall of the upper half of the tank body 1. The ash inlet pipe 4 and the ash outlet pipe 3 are both located in the upper half of the tank body 1. A manhole 11 and a fluidizing device 9 are respectively provided on the side wall of the lower half of the tank body 1. There are at least three fluidizing devices 9 and they are evenly distributed around the tank body 1.

[0060] The support structure consists of three legs arranged in a triangular shape. The top of each leg is fixed to the tank body 1, and the bottom of each leg is fixed to the base 5 via a weighing sensor 6. Each weighing sensor 6 is electrically connected to the control system 8.

[0061] One end of the ash discharge pipe 3 and the ash inlet pipe 4 are connected to the inside of the tank body 1. The other end of the ash inlet pipe 4 is provided with multiple interfaces. The other end of the ash discharge pipe 3 is connected to a connector. A second butterfly valve 13 is installed on the ash discharge pipe 3. The ash discharge pipe 3 and the ash inlet pipe 4 are connected through an emergency pipe. A third butterfly valve 14 is installed in the middle of the emergency pipe.

[0062] The fitting is either a single-head large-diameter fitting 15 or a multi-head small-diameter fitting 16.

[0063] The control system 8 includes a controller 802, which is connected to a display 801, a weighing signal conversion device 803 and an electric actuator 12. The signal receiving end of the weighing signal conversion device 803 is connected to the weighing sensor 6 through a junction box 804.

[0064] The pressure regulating device includes a pressure regulating connecting pipe 17. One end of the pressure regulating connecting pipe 17 is connected to the top of the tank 1. A pressure gauge 18 is installed on the pressure regulating connecting pipe 17. The other end of the pressure regulating connecting pipe 17 is connected to a four-way pipe. The other three ports of the four-way pipe are respectively connected to a downstream pressure regulating valve 22, a upstream pressure regulating valve 19, and a vent pipe 24. The downstream pressure regulating valve 22 and the upstream pressure regulating valve 19 are arranged opposite to each other. A fourth butterfly valve 20 is installed at the inlet end of the upstream pressure regulating valve 19. The outlet end of the upstream pressure regulating valve 19 is connected to one end of a pressure relief pipe 21. The other end of the pressure relief pipe 21 is connected to the vent pipe 24. A fifth butterfly valve 23 is installed between the vent pipe 24 and the four-way pipe.

[0065] Example 3

[0066] The present invention relates to a dual-regulating ash conveying device for air pressure and cement ash, comprising a tank body 1. The bottom of the tank body 1 is mounted on a base 5 via a support structure. A weighing sensor 6 is also provided between the support structure and the base 5. The weighing sensor 6 is connected to a control system 8. An ash inlet pipe 4 and an ash outlet pipe 3 are respectively provided on the side wall of the tank body 1. A proportional ash regulating valve 7 is installed on the ash inlet pipe 4 near the side wall of the tank body 1. The proportional ash regulating valve 7 is also connected to the control system 8 via an electric actuator 12. A pressure regulating device is provided on the top of the tank body 1.

[0067] The upper half of the tank body 1 is cylindrical, and the lower half of the tank body 1 is funnel-shaped. An observation hole 2 is provided on the side wall of the upper half of the tank body 1. The ash inlet pipe 4 and the ash outlet pipe 3 are both located in the upper half of the tank body 1. A manhole 11 and a fluidizing device 9 are respectively provided on the side wall of the lower half of the tank body 1. There are at least three fluidizing devices 9 and they are evenly distributed around the tank body 1.

[0068] The support structure consists of three legs arranged in a triangular shape. The top of each leg is fixed to the tank body 1, and the bottom of each leg is fixed to the base 5 via a weighing sensor 6. Each weighing sensor 6 is electrically connected to the control system 8.

[0069] One end of the ash discharge pipe 3 and the ash inlet pipe 4 are connected to the inside of the tank body 1. The other end of the ash inlet pipe 4 is provided with multiple interfaces. The other end of the ash discharge pipe 3 is connected to a connector. A second butterfly valve 13 is installed on the ash discharge pipe 3. The ash discharge pipe 3 and the ash inlet pipe 4 are connected through an emergency pipe. A third butterfly valve 14 is installed in the middle of the emergency pipe.

[0070] The fitting is either a single-head large-diameter fitting 15 or a multi-head small-diameter fitting 16.

[0071] The control system 8 includes a controller 802, which is connected to a display 801, a weighing signal conversion device 803 and an electric actuator 12. The signal receiving end of the weighing signal conversion device 803 is connected to the weighing sensor 6 through a junction box 804.

[0072] The pressure regulating device includes a pressure regulating connecting pipe 17. One end of the pressure regulating connecting pipe 17 is connected to the top of the tank 1. A pressure gauge 18 is installed on the pressure regulating connecting pipe 17. The other end of the pressure regulating connecting pipe 17 is connected to a four-way pipe. The other three ports of the four-way pipe are respectively connected to a downstream pressure regulating valve 22, a upstream pressure regulating valve 19, and a vent pipe 24. The downstream pressure regulating valve 22 and the upstream pressure regulating valve 19 are arranged opposite to each other. A fourth butterfly valve 20 is installed at the inlet end of the upstream pressure regulating valve 19. The outlet end of the upstream pressure regulating valve 19 is connected to one end of a pressure relief pipe 21. The other end of the pressure relief pipe 21 is connected to the vent pipe 24. A fifth butterfly valve 23 is installed between the vent pipe 24 and the four-way pipe.

[0073] The proportional ash regulating valve 7 includes a valve body 701, with an end face connecting flange 702 at the top of the valve body 701. The valve body 701 is matched and connected to the flange connecting end cover 703 through the end face connecting flange 702. The flange connecting end cover 703 has a through hole in the middle. The valve core 704 is provided inside the valve body 701. The electric actuator 12 is connected to the valve core 704 through the through hole.

[0074] Valve body 701 includes valve body shell 7011, which is cylindrical. A face-connecting flange 702 is provided at the top of valve body shell 7011, and an ash inlet 7012 is located at the bottom. The ash inlet 7012 is connected to the ash inlet pipe 4 via a first butterfly valve 10. A step 7016, which limits the movement of valve core 704, is provided on the inner wall of valve body shell 7011. A first rectangular ash outlet 7013 is provided on the side wall of valve body shell 7011. The first rectangular ash outlet 7013 has two vertical sides... The included angle of the surfaces is 90°. The valve body shell 7011 is also provided with a valve body ash outlet pipe that cooperates with the first rectangular ash outlet 7013. The valve body ash outlet pipe includes a rectangular cross-section ash outlet pipe 7014. One end of the rectangular cross-section ash outlet pipe 7014 is fixed to the side wall of the valve body shell 7011, and the other end of the rectangular cross-section ash outlet pipe 7014 is connected to a circular cross-section ash outlet pipe 7015. The circular cross-section ash outlet pipe 7015 is connected to the tank 1, and the outlet direction of the circular cross-section ash outlet pipe 7015 is tangent to the cylindrical surface of the tank 1.

[0075] The valve core 704 has a cylindrical structure and is located inside the valve body shell 7011. A first groove 7041 and a second groove 7042 are respectively opened around the outer wall of the valve core 704. A first sealing ring 7043 and a second sealing ring 7044 are installed in the first groove 7041 and the second groove 7042. A second rectangular ash outlet 7045 is opened on the side wall of the valve core 704. The second rectangular ash outlet 7045 matches the first rectangular ash outlet 7013. The included angle between the two vertical sides of the second rectangular ash outlet 7045 is 90°. An actuator connection hole 7046 is opened on the top of the valve core 704. The valve core 704 is connected to the electric actuator 12 through the actuator connection hole 7046.

Claims

1. A dual-regulating ash conveying device for air pressure and cement ash, characterized in that, The tank (1) is mounted on a base (5) at its bottom via a support structure. A weighing sensor (6) is also provided between the support structure and the base (5). The weighing sensor (6) is connected to a control system (8). An ash inlet pipe (4) and an ash outlet pipe (3) are respectively provided on the side wall of the tank (1). A proportional ash regulating valve (7) is installed on the ash inlet pipe (4) near the side wall of the tank (1). The proportional ash regulating valve (7) is also connected to the control system (8) via an electric actuator (12). A pressure regulating device is provided on the top of the tank (1). The control system (8) includes a controller (802), which is connected to a display (801), a weighing signal conversion device (803) and an electric actuator (12). The signal receiving end of the weighing signal conversion device (803) is connected to the weighing sensor (6) through a junction box (804). The pressure regulating device includes a pressure regulating connecting pipe (17), one end of which is connected to the top of the tank (1), a pressure gauge (18) is installed on the pressure regulating connecting pipe (17), and the other end of which is connected to a four-way pipe. The other three ports of the four-way pipe are respectively connected to a downstream pressure regulating valve (22), a upstream pressure regulating valve (19), and a drain pipe (24). The downstream pressure regulating valve (22) and the upstream pressure regulating valve (19) are arranged opposite to each other. A fourth butterfly valve (20) is provided at the inlet end of the upstream pressure regulating valve (19). The outlet end of the upstream pressure regulating valve (19) is connected to one end of a pressure relief pipe (21), and the other end of the pressure relief pipe (21) is connected to the drain pipe (24). A fifth butterfly valve (23) is provided between the drain pipe (24) and the four-way pipe. The proportional ash regulating valve (7) includes a valve body (701), the top of the valve body (701) is provided with an end face connecting flange (702), the valve body (701) is matched and connected to the flange connecting end cover (703) through the end face connecting flange (702), the flange connecting end cover (703) is provided with a through hole in the middle, the valve body (701) is provided with a valve core (704) inside, and the electric actuator (12) is connected to the valve core (704) through the through hole; The valve body (701) includes a valve body shell (7011), which is cylindrical. A face-connecting flange (702) is provided at the top of the valve body shell (7011), and an ash inlet (7012) is located at the bottom of the valve body shell (7011). The ash inlet (7012) is connected to the ash inlet pipe (4) via a first butterfly valve (10). A step (7016) is provided on the inner wall of the valve body shell (7011) to limit the movement of the valve core (704). A first rectangular ash outlet (7013) is provided on the side wall of the valve body shell (7011). 3) The included angle between the two vertical sides is 90°. The valve body shell (7011) is also provided with a valve body ash outlet pipe that cooperates with the first rectangular ash outlet (7013). The valve body ash outlet pipe includes a rectangular cross-section ash outlet pipe (7014). One end of the rectangular cross-section ash outlet pipe (7014) is fixed to the side wall of the valve body shell (7011). The other end of the rectangular cross-section ash outlet pipe (7014) is connected to a circular cross-section ash outlet pipe (7015). The circular cross-section ash outlet pipe (7015) is connected to the tank (1). The outlet direction of the circular cross-section ash outlet pipe (7015) is tangent to the cylindrical surface of the tank (1). The valve core (704) is a cylindrical structure. The valve core (704) is located inside the valve body shell (7011). A first groove (7041) and a second groove (7042) are respectively opened around the outer wall of the valve core (704). A first sealing ring (7043) and a second sealing ring (7044) are installed in the first groove (7041) and the second groove (7042). A second rectangular ash outlet (7045) is opened on the side wall of the valve core (704). The second rectangular ash outlet (7045) matches the first rectangular ash outlet (7013). The included angle between the two vertical sides of the second rectangular ash outlet (7045) is 90°. An actuator connection hole (7046) is opened on the top of the valve core (704). The valve core (704) is connected to the electric actuator (12) through the actuator connection hole (7046).

2. The dual-regulating ash conveying device for air pressure and cement ash as described in claim 1, characterized in that, The upper half of the tank (1) is cylindrical, and the lower half of the tank (1) is funnel-shaped. An observation hole (2) is provided on the side wall of the upper half of the tank (1). The ash inlet pipe (4) and the ash outlet pipe (3) are both located in the upper half of the tank (1). A manhole (11) and a fluidizing device (9) are respectively provided on the side wall of the lower half of the tank (1). There are at least three fluidizing devices (9) and they are evenly distributed around the tank (1).

3. The dual-regulating ash conveying device for air pressure and cement ash as described in claim 1, characterized in that, The support structure consists of three legs, which are arranged in a triangular shape. The top of each leg is fixed to the tank (1), and the bottom of each leg is fixed to the base (5) through a weighing sensor (6). Each weighing sensor (6) is electrically connected to the control system (8).

4. The dual-regulating ash conveying device for air pressure and cement ash as described in claim 1, characterized in that, One end of the ash discharge pipe (3) and the ash inlet pipe (4) are connected to the inside of the tank body (1). The other end of the ash inlet pipe (4) is provided with multiple interfaces. The other end of the ash discharge pipe (3) is connected to a connector. A second butterfly valve (13) is provided on the ash discharge pipe (3). The ash discharge pipe (3) and the ash inlet pipe (4) are connected through an emergency pipe. A third butterfly valve (14) is provided in the middle of the emergency pipe.

5. The dual-regulating ash conveying device for air pressure and cement ash according to claim 4, characterized in that, The connector is either a single-head large-diameter connector (15) or a multi-head small-diameter connector (16).

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