A desulfurization pump with anti-cavitation function and control method thereof

Abstract

The present invention relates to the technical field of desulfurization pumps, and in particular to a desulfurization pump with anti-cavitation function and a control method thereof, comprising a base, on which a desulfurization pump body is fixedly mounted, and also comprising: a round shell, at the shell opening of which an end cover is mounted, and the round shell is fixedly mounted on the top of the base through a mounting frame, and a first delivery pipe and a second delivery pipe are symmetrically fixedly connected on the surface of the round shell, and the second delivery pipe is fixedly connected to a liquid inlet pipe of the desulfurization pump body; a rotating disk, rotatably connected to the inner wall of the round shell, and a first connecting cavity is opened through the surface of the rotating disk; a detection unit, for detecting the temperature of a desulfurization medium; a cooling and anti-cavitation mechanism, arranged inside the first connecting cavity, for cooling the desulfurization medium; based on the temperature detected by the detection unit, the cooling and anti-cavitation mechanism is controlled by a control unit to operate to cool the desulfurization medium, thereby reducing the vapor pressure and reducing the occurrence of cavitation.

Description

Technical Field

[0001] The invention relates to the field of desulfurization pumps, and in particular to a desulfurization pump with anti-cavitation function and a control method thereof. Background Art

[0002] The desulfurization pump is a corrosion-resistant pump mainly used for the transportation of corrosive liquids. It is responsible for transporting the desulfurizer during the desulfurization process to ensure its continuous flow and distribution in the desulfurization system. Cavitation refers to a phenomenon that occurs when the pressure in the liquid drops below the vapor pressure of the liquid. In this case, bubbles or cavities will form in some areas of the liquid. These bubbles will collapse or rupture rapidly when they reach the high-pressure area as the liquid flows, generating a strong shock wave. This shock wave will damage the internal components of the pump, causing material erosion, vibration, and increased noise, which may eventually cause a decrease in pump performance or mechanical failure.

[0003] When the desulfurization medium flows in the desulfurization pump and the desulfurization system, the temperature of the desulfurization medium will rise due to frictional heat generation and chemical reaction heat release. If the medium temperature is high, its vapor pressure will also increase accordingly, which can easily cause cavitation to the desulfurization pump. In the process of existing desulfurization pumps transporting desulfurization media, it is not convenient to prevent cavitation in advance, which causes erosion and damage to the desulfurization pump materials. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a desulfurization pump with anti-cavitation function and a control method thereof.

[0005] In a first aspect, the present invention provides a desulfurization pump with anti-cavitation function, comprising a base, on which a desulfurization pump body is fixedly mounted, and further comprising:

[0006] A round shell, an end cover is installed at the shell opening of the round shell, the round shell is fixedly mounted on the top of the base through a mounting frame, a first delivery pipe and a second delivery pipe are symmetrically fixedly connected on the surface of the round shell, and the second delivery pipe is fixedly connected to the liquid inlet pipe of the desulfurization pump body;

[0007] A rotating disk is rotatably connected to the inner wall of the circular shell, and a first communicating cavity is formed through the surface of the rotating disk;

[0008] A detection unit, used to detect the temperature of the desulfurization medium;

[0009] A cooling and anti-cavitation mechanism is arranged inside the first communicating cavity and is used to cool the desulfurization medium;

[0010] The control unit controls the operation of the temperature-reducing and anti-cavitation mechanism to reduce the temperature of the desulfurization medium according to the temperature detected by the detection unit.

[0011] During operation, the desulfurization medium will enter the desulfurization pump body from the first delivery pipe along the first connecting cavity and the second delivery pipe, and then be transported to the desulfurization system through the desulfurization pump body. When the desulfurization medium flows in the desulfurization pump body and the desulfurization system, the temperature of the desulfurization medium will increase with the frictional heat and the chemical reaction heat release. If the medium temperature is high, its vapor pressure will also increase accordingly. This is because the high temperature increases the kinetic energy of the molecules in the medium, making it easier to change from a liquid state to a gas state. If the suction pressure of the desulfurization pump body is lower than the vapor pressure of the medium, bubbles will form inside the desulfurization pump body. The bubbles formed will collapse rapidly when they reach the high-pressure area as the desulfurization medium liquid flows. The pressure shock wave generated when the bubbles collapse will repeatedly act on the internal surface of the desulfurization pump body, causing material erosion and damage, thereby causing cavitation to the desulfurization pump body. In order to avoid cavitation, A detection unit is set to perform real-time detection on the temperature of the desulfurization medium. When the detection unit detects that the temperature of the desulfurization medium is below a preset temperature, it indicates that this temperature will not cause cavitation, and the desulfurization medium can be normally transported to the inside of the desulfurization pump body through the first connecting cavity and the second delivery pipe. When the desulfurization temperature detected by the detection unit reaches the set temperature range, first temperature information is generated, and the first temperature information is sent to the control unit. The control unit operates the cooling and anti-cavitation mechanism to cool the desulfurization medium, thereby reducing the vapor pressure of the desulfurization medium and reducing the occurrence of cavitation, thereby achieving the purpose of anti-cavitation. When the desulfurization temperature detected by the detection unit exceeds the set temperature range, it indicates that the cooling and anti-cavitation mechanism can no longer avoid the continued occurrence of cavitation, and therefore the second temperature information is generated and sent to the control unit, and the desulfurization pump body is controlled to stop operating by the control unit.

[0012] Preferably, the cooling and anti-cavitation mechanism comprises:

[0013] Two second communication chambers are symmetrically arranged on the surface of the rotating disk, and the two second communication chambers are both connected to the first communication chamber;

[0014] Two refrigeration plates are respectively embedded on the inner walls of the two second communicating cavities;

[0015] Two connecting posts are symmetrically fixedly connected to the side wall of the rotating disk, and a rectangular cavity is formed between the two connecting posts and the rotating disk, and the rectangular cavity is composed of a first sliding cavity respectively formed on the side walls of the two connecting posts and a second sliding cavity formed on the side wall of the rotating disk;

[0016] A rectangular block is slidably connected inside the rectangular cavity, and a first circular cavity and a second circular cavity are formed through a side wall of the rectangular block;

[0017] A rotary drive mechanism, arranged on the inner wall of the circular shell, for driving the rotating disk to rotate ninety degrees;

[0018] The switching mechanism is arranged at the end of the rectangular block. When the rectangular block rotates with the rotating disk, the linkage switching mechanism drives the rectangular block to slide along the inner wall of the rectangular cavity, switching the second circular cavity to communicate with the two second connecting cavities.

[0019] Preferably, the rotary drive mechanism comprises:

[0020] An outer gear ring fixedly connected to a surface of one of the connecting posts near the end cover;

[0021] The motor is fixedly mounted on the inner wall of the circular shell, and the end of the output shaft of the motor is fixedly connected with a gear, and the gear is meshed with the outer gear ring.

[0022] Preferably, the switching mechanism comprises:

[0023] A fixed cylinder is fixedly connected to the side wall of the round shell, and one end of the cylinder mouth of the fixed cylinder extends into the inside of the round shell, and a guide groove is opened on the inner wall of the fixed cylinder;

[0024] A fixed column is fixedly connected to the side wall of the rectangular block, a sliding pin is fixedly connected to the surface of the fixed column, and an end of the sliding pin is inserted into the interior of the guide groove.

[0025] Preferably, the cooling and anti-cavitation mechanism further comprises two groups of stirring mechanisms, and the two groups of stirring mechanisms are respectively arranged inside the two second communicating cavities;

[0026] The stirring mechanism includes a fixed frame, which is fixedly connected to the inner wall of one end of the second connecting cavity close to the rectangular cavity. A rotating shaft is rotatably connected to the fixed frame, an impeller is fixedly connected to the end of the rotating shaft, and three stirring blades are fixedly connected to the surface of the rotating shaft.

[0027] Preferably, the detection unit includes a first sensor and a second sensor, the first sensor is installed on the surface of the first delivery pipe, and is used to detect the temperature of the desulfurization medium transported inside the first delivery pipe, and the second sensor is installed on the surface of the second delivery pipe, and is used to detect the temperature of the desulfurization medium transported inside the second delivery pipe.

[0028] In a second aspect, a control method for a desulfurization pump with anti-cavitation is provided, the control method comprising the following steps:

[0029] The first sensor detects the temperature of the desulfurization medium to determine whether the temperature of the desulfurization medium meets the normal transportation temperature;

[0030] When the first sensor detects that the temperature of the desulfurization medium is within a preset temperature range, first temperature information is generated, and the control unit controls the operation of the cooling and anti-cavitation mechanism to cool the desulfurization medium;

[0031] When the first sensor detects that the temperature of the desulfurization medium exceeds a preset temperature range value, second temperature information is generated, and the control unit controls the desulfurization pump body to stop operating.

[0032] Preferably, the control method further comprises the following steps:

[0033] The second sensor will detect the temperature of the desulfurized medium after the temperature is reduced again. When the temperature detected by the second sensor is still not lower than the preset temperature, the third temperature information is generated;

[0034] The second sensor sends the third temperature information to the control unit, and the control unit controls the desulfurization pump body to stop operating.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. A detection unit is set to perform real-time detection on the temperature of the desulfurization medium. When the detection unit detects that the temperature of the desulfurization medium is below a preset temperature, it indicates that this temperature will not cause cavitation, and the desulfurization medium can be normally transported to the interior of the desulfurization pump body through the first connecting cavity and the second delivery pipe. When the desulfurization temperature detected by the detection unit reaches a set temperature range, first temperature information is generated, and the first temperature information is sent to the control unit. The control unit operates the cooling and anti-cavitation mechanism to cool the desulfurization medium, thereby reducing the vapor pressure of the desulfurization medium and reducing the occurrence of cavitation, thereby achieving the purpose of anti-cavitation. When the desulfurization temperature detected by the detection unit exceeds the set temperature range, it indicates that the cooling and anti-cavitation mechanism can no longer avoid the continued occurrence of cavitation, and therefore generates second temperature information to the control unit, which controls the desulfurization pump body to stop operating.

[0037] 2. When the detection unit detects that the temperature of the desulfurization medium inside the first delivery pipe reaches a preset temperature range value, the control unit operates the rotary drive mechanism and the refrigeration plate to operate. The rotary drive mechanism drives the rotating disk to rotate ninety degrees along the inner wall of the circular shell, thereby adjusting the two second connecting chambers to a horizontal state to transport the desulfurization medium. While the rotating disk rotates, the rectangular block is linked to slide along the inner wall of the rectangular cavity with the help of a switching mechanism, and the second circular cavity is switched to be connected with the two second connecting chambers, so that the desulfurization medium is transported to the second delivery pipe along the second connecting cavity and the second circular cavity. At the same time, the desulfurization medium is cooled during transportation by the refrigeration plate. The vapor pressure is proportional to the temperature of the desulfurization medium liquid. According to the principles of physical chemistry, when the temperature decreases, the average kinetic energy of the liquid molecules decreases, and the rate at which the molecules escape into the gas phase decreases. Therefore, the vapor pressure also decreases, thereby reducing the risk of cavitation during operation of the desulfurization pump body and achieving the purpose of preventing cavitation.

[0038] 3. When the two second connecting chambers are switched to the horizontal conveying station, the conveyed desulfurization medium will drive the impeller installed on the surface of the rotating shaft to rotate during the flow of the desulfurization medium inside the second connecting chamber by the flow kinetic energy of the slurry. The rotating impeller will assist the conveyed desulfurization medium to continue to be conveyed to the inside of the second conveying pipe, and at the same time drive the rotating shaft to rotate, and stir the desulfurization medium inside the second connecting chamber with the help of the stirring blades on the surface of the rotating shaft. The stirring of the stirring blades facilitates the desulfurization medium in the conveying process to be pushed to the surface of the refrigeration plate, thereby increasing the contact area between the desulfurization medium and the surface of the refrigeration plate, which is beneficial for the refrigeration plate to better cool the desulfurization medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is a schematic diagram of the internal structure of the round shell of the present invention;

[0041] Figure 3 The circular shell of the present invention is partially cut away Figure 1 ;

[0042] Figure 4 It is a schematic diagram of the overall structure of the rotating disk of the present invention;

[0043] Figure 5 The circular shell of the present invention is partially cut away Figure 2 ;

[0044] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0045] Figure 7 This is a structural schematic diagram of the connection between the fixed column and the sliding pin of the present invention;

[0046] Figure 8 This is a flow chart of the control method of the present invention.

[0047] In the figure: 1, base; 2, desulfurization pump body; 3, round shell; 301, end cover; 4, first delivery pipe; 5, second delivery pipe; 6, rotating disk; 7, first connecting cavity; 8, second connecting cavity; 9, refrigeration plate; 10, connecting column; 1101, first sliding cavity; 1102, second sliding cavity; 12, rectangular block; 13, first circular cavity; 14, second circular cavity; 15, outer gear ring; 16, motor; 17, gear; 18, fixed cylinder; 19, guide groove; 20, fixed column; 21, sliding pin; 22, fixed frame; 23, rotating shaft; 24, impeller; 25, stirring blade; 26, first sensor; 27, second sensor; 28, mounting frame. DETAILED DESCRIPTION

[0048] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0049] like Figures 1 to 7 The desulfurization pump with anti-cavitation function shown in the figure comprises a base 1, on which a desulfurization pump body 2 is fixedly mounted, and further comprises:

[0050] The round shell 3 is provided with an end cover 301 at its shell opening. The round shell 3 is fixedly mounted on the top of the base 1 through a mounting frame 28. The surface of the round shell 3 is symmetrically fixedly connected with a first delivery pipe 4 and a second delivery pipe 5. The second delivery pipe 5 is fixedly connected with the liquid inlet pipe of the desulfurization pump body 2.

[0051] The rotating disk 6 is rotatably connected to the inner wall of the round shell 3, and a first communicating cavity 7 is formed through the surface of the rotating disk 6;

[0052] A detection unit, used to detect the temperature of the desulfurization medium;

[0053] A cooling and anti-cavitation mechanism is arranged inside the first communicating cavity 7 and is used to cool the desulfurization medium;

[0054] The control unit controls the operation of the cooling and anti-cavitation mechanism to cool the desulfurization medium according to the temperature detected by the detection unit. When working, the desulfurization medium will enter the desulfurization pump body 2 from the first delivery pipe 4 along the first connecting cavity 7 and the second delivery pipe 5, and then be transported to the desulfurization system through the desulfurization pump body 2. When the desulfurization medium flows in the desulfurization pump body 2 and the desulfurization system, the temperature of the desulfurization medium will increase with the frictional heat and the chemical reaction heat release. If the medium temperature is high, its vapor pressure will also increase accordingly. This is because the high temperature increases the kinetic energy of the molecules in the medium, making it easier to change from a liquid state to a gas state. If the suction pressure of the desulfurization pump body 2 is lower than the vapor pressure of the medium, bubbles will form inside the desulfurization pump body 2. The bubbles formed will collapse rapidly when the flow of the desulfurization medium liquid reaches the high-pressure area. The pressure shock wave generated when the bubbles collapse will repeatedly act on the internal surface of the desulfurization pump body 2, causing material erosion and damage. In order to avoid cavitation, a detection unit is provided to detect the temperature of the desulfurization medium in real time. When the detection unit detects that the temperature of the desulfurization medium is below the preset temperature, it indicates that the temperature will not cause cavitation, and the desulfurization medium can be normally transported to the inside of the desulfurization pump body 2 through the first connecting cavity 7 and the second delivery pipe 5. When the desulfurization temperature detected by the detection unit reaches the set temperature range, the first temperature information is generated and sent to the control unit. The control unit operates the cooling and anti-cavitation mechanism to cool the desulfurization medium, thereby reducing the vapor pressure of the desulfurization medium and reducing the occurrence of cavitation, thereby achieving the purpose of anti-cavitation. When the desulfurization temperature detected by the detection unit exceeds the set temperature range, it indicates that the cooling and anti-cavitation mechanism can no longer avoid the continued occurrence of cavitation, and therefore the second temperature information is generated and sent to the control unit, which controls the desulfurization pump body 2 to stop operating.

[0055] As an embodiment of the present invention, the cooling and anti-cavitation mechanism includes:

[0056] Two second communication chambers 8 are symmetrically arranged on the surface of the rotating disk 6, and both of the two second communication chambers 8 are connected to the first communication chamber 7;

[0057] Two refrigeration plates 9 are respectively embedded on the inner walls of the two second communicating cavities 8;

[0058] Two connecting posts 10 are symmetrically fixedly connected to the side wall of the rotating disk 6. A rectangular cavity is formed between the two connecting posts 10 and the rotating disk 6. The rectangular cavity is composed of a first sliding cavity 1101 respectively formed on the side walls of the two connecting posts 10 and a second sliding cavity 1102 formed on the side wall of the rotating disk 6.

[0059] A rectangular block 12 is slidably connected inside the rectangular cavity, and a first circular cavity 13 and a second circular cavity 14 are formed through the side wall of the rectangular block 12;

[0060] The rotary drive mechanism is arranged on the inner wall of the round shell 3 and is used to drive the rotating disk 6 to rotate ninety degrees;

[0061] The switching mechanism is arranged at the end of the rectangular block 12. When the rectangular block 12 rotates with the rotating disk 6, the linkage switching mechanism drives the rectangular block 12 to slide along the inner wall of the rectangular cavity, and switches the second circular cavity 14 to be connected with the two second connecting cavities 8; when working, in the initial state, the opened first circular cavity 13 is in a connected state with the first connecting cavity 7, which is convenient for the normal transportation of the desulfurization medium. When the detection unit detects that the temperature of the desulfurization medium inside the first conveying pipe 4 reaches the preset temperature range value, the control unit operates the rotary drive mechanism and the refrigeration plate 9 to operate, and the rotary drive mechanism drives the rotating disk 6 to rotate ninety degrees along the inner wall of the round shell 3, thereby adjusting the two second connecting cavities 8 to the horizontal The desulfurization medium is transported in the state, and when the rotating disk 6 rotates, the rectangular block 12 is linked to slide along the inner wall of the rectangular cavity with the help of the switching mechanism, and the second circular cavity 14 is switched to be connected with the two second connecting cavities 8, so that the desulfurization medium is transported to the second conveying pipe 5 along the second connecting cavity 8 and the second circular cavity 14. At the same time, the desulfurization medium in the transportation process is cooled by the refrigeration plate 9. The vapor pressure is proportional to the temperature of the desulfurization medium liquid. According to the principles of physical chemistry, when the temperature decreases, the average kinetic energy of the liquid molecules decreases, and the rate at which the molecules escape to the gas phase decreases, so the vapor pressure also decreases, thereby reducing the risk of cavitation during the operation of the desulfurization pump body 2, thereby achieving the purpose of preventing cavitation.

[0062] As an embodiment of the present invention, the rotary drive mechanism includes:

[0063] The outer gear ring 15 is fixedly connected to the surface of one of the connecting posts 10 near the end cover 301;

[0064] The motor 16 is fixedly mounted on the inner wall of the round shell 3, and the end of the output shaft of the motor 16 is fixedly connected to the gear 17, and the gear 17 is meshed with the outer gear ring 15; when working, the control unit controls the motor 16 to start, and the output shaft of the motor 16 drives the gear 17 to rotate ninety degrees. Since the gear 17 is meshed with the outer gear ring 15 connected to the surface of the connecting column 10, the rotating gear 17 drives the rotating disk 6 to rotate under the transmission of the outer gear ring 15 and the connecting column 10, thereby realizing the switching between the first connecting chamber 7 and the second connecting chamber 8, and facilitating the switching of the second connecting chamber 8 equipped with the refrigeration plate 9 to the horizontal conveying station to cool and convey the desulfurization medium.

[0065] As an embodiment of the present invention, the switching mechanism includes:

[0066] The fixed tube 18 is fixedly connected to the side wall of the round shell 3, and one end of the tube mouth of the fixed tube 18 extends into the inside of the round shell 3. A guide groove 19 is opened on the inner wall of the fixed tube 18;

[0067] The fixed column 20 is fixedly connected to the side wall of the rectangular block 12, and a sliding pin 21 is fixedly connected to the surface of the fixed column 20, and the end of the sliding pin 21 is inserted into the inside of the guide groove 19; during operation, when the rotating disk 6 rotates ninety degrees, the rotating disk 6 drives the rectangular block 12 to rotate with the help of the connecting column 10, and the rotation of the rectangular block 12 drives the fixed column 20 to rotate. During the rotation of the fixed column 20, the sliding pin 21 connected to the surface of the fixed column 20 will move along the inner wall of the guide groove 19. Under the guidance of the inner wall of the guide groove 19, the fixed column 20 is prompted to push the rectangular block 12 to move along the inside of the rectangular cavity, so that the second circular cavity 14 is connected with the two second connecting cavities 8, which is convenient for the transportation of the desulfurization medium.

[0068] As an embodiment of the present invention, the cooling and anti-cavitation mechanism further includes two groups of stirring mechanisms, and the two groups of stirring mechanisms are respectively arranged inside the two second connecting chambers 8;

[0069] The stirring mechanism includes a fixed frame 22, which is fixedly connected to the inner wall of one end of the second connecting chamber 8 close to the rectangular chamber, and a rotating shaft 23 is rotatably connected to the fixed frame 22, and an impeller 24 is fixedly connected to the end of the rotating shaft 23, and three stirring blades 25 are fixedly connected to the surface of the rotating shaft 23; when working, when the two second connecting chambers 8 are switched to the horizontal conveying station, the conveyed desulfurization medium flows inside the second connecting chamber 8, and the impeller 24 installed on the surface of the rotating shaft 23 is driven to rotate by the flow kinetic energy of the slurry. The rotating impeller 24 will assist the conveyed desulfurization medium to continue to be conveyed to the inside of the second conveying pipe 5, and at the same time drive the rotating shaft 23 to rotate, and the desulfurization medium inside the second connecting chamber 8 is stirred by the stirring blades 25 on the surface of the rotating shaft 23. The stirring of the stirring blades 25 facilitates the desulfurization medium in the conveying process to be pushed to the surface of the refrigeration plate 9, thereby increasing the contact area between the desulfurization medium and the surface of the refrigeration plate 9, which is conducive to the refrigeration plate 9 to better cool the desulfurization medium.

[0070] As an embodiment of the present invention, the detection unit includes a first sensor 26 and a second sensor 27. The first sensor 26 is installed on the surface of the first delivery pipe 4 to detect the temperature of the desulfurization medium transported inside the first delivery pipe 4. The second sensor 27 is installed on the surface of the second delivery pipe 5 to detect the temperature of the desulfurization medium transported inside the second delivery pipe 5. When working, the first sensor 26 and the second sensor 27 are both temperature sensors. The first sensor 26 arranged on the first delivery pipe 4 is convenient for real-time temperature detection of the desulfurization medium to be transported to the inside of the round shell 3 in advance. When the temperature detected by the first sensor 26 reaches within a preset temperature range, the first temperature information is generated, and the control unit operates the cooling and anti-cavitation mechanism to cool the desulfurization medium. The quality is cooled, which means that the temperature of the desulfurization medium can be reduced to below the required temperature through the cooling and anti-cavitation mechanism. The second sensor 27 can perform temperature detection on the desulfurization medium again before entering the desulfurization pump body 2 after cooling, to ensure that the temperature of the desulfurization medium entering the desulfurization pump body 2 is below the specified temperature, thereby reducing the vapor pressure and reducing the occurrence of cavitation. If the second sensor 27 detects that the desulfurization medium after cooling is still not below the preset temperature, the control unit will stop the operation of the desulfurization pump body 2. If the temperature detected by the first sensor 26 exceeds the set temperature range value, the second temperature information is generated, which means that the temperature at this time is difficult to be reduced to the required temperature through the cooling and anti-cavitation mechanism. Therefore, it is necessary to control the desulfurization pump body 2 to stop operation through the control unit.

[0071] like Figure 8 A control method for a desulfurization pump with anti-cavitation is shown, the control method comprising the following steps:

[0072] The first sensor 26 detects the temperature of the desulfurization medium to determine whether the temperature of the desulfurization medium meets the normal transportation temperature;

[0073] When the first sensor 26 detects that the temperature of the desulfurization medium is within a preset temperature range, first temperature information is generated, and the control unit controls the cooling and anti-cavitation mechanism to cool the desulfurization medium;

[0074] When the first sensor 26 detects that the temperature of the desulfurization medium exceeds a preset temperature range, second temperature information is generated, and the control unit controls the desulfurization pump body 2 to stop operating.

[0075] As an embodiment of the present invention, the control method further includes the following steps:

[0076] The second sensor 27 will detect the temperature of the desulfurized medium after the temperature is lowered again. When the temperature detected by the second sensor 27 is still not lower than the preset temperature, the third temperature information is generated.

[0077] The second sensor 27 sends the third temperature information to the control unit, and the control unit controls the desulfurization pump body 2 to stop operating.

[0078] Working principle of the present invention: when working, the desulfurization medium will enter the desulfurization pump body 2 from the first delivery pipe 4 along the first connecting cavity 7 and the second delivery pipe 5, and then be delivered to the desulfurization system through the desulfurization pump body 2. When the desulfurization medium flows in the desulfurization pump body 2 and the desulfurization system, the temperature of the desulfurization medium will increase with the frictional heat and the chemical reaction heat release. If the medium temperature is high, its vapor pressure will also increase accordingly. This is because the high temperature increases the kinetic energy of the molecules in the medium, making it easier to change from a liquid state to a gas state. If the suction pressure of the desulfurization pump body 2 is lower than the vapor pressure of the medium, bubbles will form inside the desulfurization pump body 2. The bubbles formed will collapse rapidly when the flow of the desulfurization medium liquid reaches the high-pressure area. The pressure shock wave generated when the bubbles collapse will repeatedly act on the internal surface of the desulfurization pump body 2, causing material erosion and damage, thereby causing cavitation to the desulfurization pump body 2. In order to avoid cavitation, a detection unit is provided to perform real-time detection on the temperature of the desulfurization medium. When the detection unit detects that the temperature of the desulfurization medium is below a preset temperature, it indicates that this temperature will not cause cavitation, and the desulfurization medium can be normally transported to the inside of the desulfurization pump body 2 through the first connecting cavity 7 and the second delivery pipe 5. When the desulfurization temperature detected by the detection unit reaches the set temperature range, first temperature information is generated and sent to the control unit, and the control unit operates the cooling and anti-cavitation mechanism to cool the desulfurization medium, thereby reducing the vapor pressure of the desulfurization medium and reducing the occurrence of cavitation, thereby achieving the purpose of anti-cavitation. When the desulfurization temperature detected by the detection unit exceeds the set temperature range, it indicates that the cooling and anti-cavitation mechanism can no longer avoid the continued occurrence of cavitation, and therefore the second temperature information is generated and sent to the control unit, and the control unit controls the desulfurization pump body 2 to stop operating.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A desulfurization pump with anti-cavitation function, comprising a base (1), on which a desulfurization pump body (2) is fixedly mounted, characterized in that: Also includes: A round shell (3), an end cover (301) is installed at the shell opening of the round shell (3), the round shell (3) is fixedly installed on the top of the base (1) through a mounting frame (28), a first delivery pipe (4) and a second delivery pipe (5) are symmetrically fixedly connected on the surface of the round shell (3), and the second delivery pipe (5) is fixedly connected to the liquid inlet pipe of the desulfurization pump body (2); A rotating disk (6) is rotatably connected to the inner wall of the circular shell (3), and a first communicating cavity (7) is formed through the surface of the rotating disk (6); A detection unit, used to detect the temperature of the desulfurization medium; A temperature reduction and anti-cavitation mechanism, arranged inside the first communicating cavity (7) and used for reducing the temperature of the desulfurization medium; The control unit controls the operation of the cooling and anti-cavitation mechanism to cool the desulfurization medium according to the temperature detected by the detection unit; The cooling and anti-cavitation mechanism comprises: Two second communication chambers (8) are symmetrically arranged on the surface of the rotating disk (6), and the two second communication chambers (8) are both connected to the first communication chamber (7); Two refrigeration plates (9) are respectively embedded on the inner walls of the two second communicating cavities (8); Two connecting columns (10) are symmetrically fixedly connected to the side wall of the rotating disk (6); a rectangular cavity is provided between the two connecting columns (10) and the rotating disk (6); the rectangular cavity is composed of a first sliding cavity (1101) respectively provided on the side walls of the two connecting columns (10) and a second sliding cavity (1102) provided on the side wall of the rotating disk (6); A rectangular block (12) is slidably connected inside the rectangular cavity, and a first circular cavity (13) and a second circular cavity (14) are formed through the side wall of the rectangular block (12); A rotary drive mechanism, arranged on the inner wall of the circular shell (3), and used for driving the rotating disk (6) to rotate ninety degrees; a switching mechanism, arranged at an end of the rectangular block (12); when the rectangular block (12) rotates along with the rotating disk (6), the linkage switching mechanism drives the rectangular block (12) to slide along the inner wall of the rectangular cavity, thereby switching the second circular cavity (14) to communicate with the two second connecting cavities (8); The switching mechanism comprises: A fixed cylinder (18) is fixedly connected to the side wall of the circular shell (3), and one end of the cylinder mouth of the fixed cylinder (18) extends into the interior of the circular shell (3), and a guide groove (19) is provided on the inner wall of the fixed cylinder (18); A fixed column (20) is fixedly connected to the side wall of the rectangular block (12), a sliding pin (21) is fixedly connected to the surface of the fixed column (20), and an end of the sliding pin (21) is inserted into the interior of the guide groove (19).

2. A desulfurization pump with anti-cavitation function according to claim 1, characterized in that: The rotary drive mechanism comprises: An outer toothed ring (15) fixedly connected to a surface of one of the connecting posts (10) close to the end cover (301); The motor (16) is fixedly mounted on the inner wall of the circular shell (3); the end of the output shaft of the motor (16) is fixedly connected to a gear (17); the gear (17) is meshed with the outer gear ring (15).

3. The desulfurization pump with anti-cavitation function according to claim 1, characterized in that: The cooling and anti-cavitation mechanism further comprises two groups of stirring mechanisms, and the two groups of stirring mechanisms are respectively arranged inside the two second connecting cavities (8); The stirring mechanism comprises a fixed frame (22), the fixed frame (22) being fixedly connected to an inner wall of one end of the second connecting cavity (8) close to the rectangular cavity, a rotating shaft (23) being rotatably connected to the fixed frame (22), an impeller (24) being fixedly connected to the end of the rotating shaft (23), and three stirring blades (25) being fixedly connected to the surface of the rotating shaft (23).

4. The desulfurization pump with anti-cavitation function according to claim 1, characterized in that: The detection unit comprises a first sensor (26) and a second sensor (27); the first sensor (26) is mounted on the surface of the first delivery pipe (4) and is used to detect the temperature of the desulfurization medium transported inside the first delivery pipe (4); the second sensor (27) is mounted on the surface of the second delivery pipe (5) and is used to detect the temperature of the desulfurization medium transported inside the second delivery pipe (5).

5. A control method for a desulfurization pump with anti-cavitation function, applicable to the desulfurization pump with anti-cavitation function as claimed in claim 4, characterized in that: The control method comprises the following steps: The first sensor (26) detects the temperature of the desulfurization medium to determine whether the temperature of the desulfurization medium meets the normal transportation temperature; When the first sensor (26) detects that the temperature of the desulfurization medium is within a preset temperature range, first temperature information is generated, and the control unit controls the operation of the cooling and anti-cavitation mechanism to cool the desulfurization medium; When the first sensor (26) detects that the temperature of the desulfurization medium exceeds a preset temperature range value, second temperature information is generated, and the control unit controls the desulfurization pump body (2) to stop operating.

6. The control method of a desulfurization pump with anti-cavitation function according to claim 5, characterized in that: The control method also includes the following steps: The second sensor (27) detects the temperature of the desulfurized medium after the temperature is lowered again, and generates third temperature information when the temperature detected by the second sensor (27) is still not lower than the preset temperature; The second sensor (27) sends the third temperature information to the control unit, and the control unit controls the desulfurization pump body (2) to stop operating.

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