A magnetic pump for gas-liquid two-phase mixed transmission

Abstract

The present invention discloses a magnetic pump for gas-liquid two-phase mixed transmission, comprising a housing and a fixed shell, a feeding cavity is formed between the housing and the fixed shell, a feeding port is provided on the side of the housing away from the fixed shell, a feeding pipe mechanism is connected to the feeding port, the feeding pipe mechanism comprises a feeding pipe 1, a feeding pipe 2 and a supporting sleeve, one end of the supporting sleeve is connected to the outer periphery of the housing, the other end of the supporting sleeve is connected to the outer periphery of the feeding pipe 1, the feeding pipe 2 is connected to the housing, a reducing mechanism is provided between the feeding pipe 1 and the feeding pipe 2, a discharging pipe is provided on the side of the housing, and an impeller is provided in the feeding cavity. The present invention can change the diameter of the feeding port to reduce the occurrence of cavitation.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic pumps, and more specifically, to a gas-liquid two-phase mixed transmission magnetic pump. Background Art

[0002] Cavitation refers to the phenomenon that when the pressure at the inlet of the magnetic pump drops to a level equal to or less than the saturated vapor pressure of the liquid at ambient temperature, the liquid begins to vaporize and form bubbles. After these bubbles enter the high-pressure area of ​​the pump with the liquid, the bubbles quickly rupture and re-condense because the surrounding pressure is higher than the saturated vapor pressure in the bubbles. During the condensation process, liquid particles accelerate from all sides to the center of the bubble, generating great local pressure and impact force, causing damage to the pump body and impeller. Therefore, it is necessary to improve the inlet structure of the existing magnetic pump to reduce cavitation. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a magnetic pump for gas-liquid two-phase mixed transmission.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] The invention discloses a magnetic pump for mixed transmission of gas and liquid two-phases, comprising a shell and a fixed shell, a feeding cavity is formed between the shell and the fixed shell, a feeding port is provided on a side of the shell away from the fixed shell, a feeding pipe mechanism is connected to the feeding port, the feeding pipe mechanism comprises a first feeding pipe, a second feeding pipe and a supporting sleeve, one end of the supporting sleeve is connected to the outer periphery of the shell, the other end of the supporting sleeve is connected to the outer periphery of the first feeding pipe, the second feeding pipe is connected to the shell, a reducing mechanism is arranged between the first feeding pipe and the second feeding pipe, a discharging pipe is provided on the side of the shell, an impeller is arranged in the feeding cavity, a transmission shaft is connected to the side of the impeller away from the shell, the transmission shaft penetrates the fixed shell, a fixed cover is connected to the side of the fixed shell away from the shell, an installation cavity is formed between the fixed cover and the fixed shell, a magnetic block is installed on the outer periphery of the transmission shaft, and also comprises a driving motor, the driving motor is connected to the driving shaft, the other end of the driving shaft extends into the installation cavity and is connected to a magnetic frame, and a magnetic block two matching with the first magnetic block is installed on the magnetic frame.

[0006] Furthermore, the diameter-changing mechanism includes a plurality of moving blocks that are evenly distributed, and abutment blocks are movably provided on both sides of the moving blocks. The relatively close abutment blocks of two adjacent moving blocks abut against each other, and also includes a driving mechanism that can drive the moving blocks to move along the radial direction of the feed pipe.

[0007] Furthermore, the driving mechanism includes a screw connected to the outside of the moving block, a transmission gear is threadedly connected to the screw, an annular frame is installed on the inner side of the support sleeve, a ring plate is installed on the inner side of the annular frame, the end of the screw is arranged through the ring plate, a limit frame is installed in the ring plate, the transmission gear is located between the ring plate and the limit frame, and plane bearings are arranged between the transmission gear and the ring plate, and between the transmission gear and the limit frame. It also includes a driving motor 2 and a gear ring 1, and several transmission gears are meshed with the gear ring 1. The driving motor 2 can drive the gear ring 1 to rotate.

[0008] Furthermore, a plurality of limit seats are installed in the annular frame, gear ring 1 is rotatably set on the limit seat, gear ring 1 is connected to gear ring 2 on the side away from the transmission gear, drive motor 2 is installed in the support sleeve, drive motor 2 is connected to a drive gear, a drive gear is provided on the annular frame at a position corresponding to the drive gear, a part of the drive gear is arranged through the through hole, and the drive gear is meshed with gear ring 2.

[0009] Furthermore, a telescopic cavity is provided inside the moving block, a part of the pressing block is located in the telescopic cavity, a support column is provided in the telescopic cavity, and a spring is connected between the support column and the pressing block.

[0010] Furthermore, a positioning hole is opened on the inner side of the pressing block, a positioning rod is connected to the supporting column, and a part of the positioning rod is inserted into the positioning hole.

[0011] Furthermore, a plurality of sealing grooves are provided on one side of the feed pipe 1 close to the diameter-changing mechanism, and the plurality of sealing grooves are evenly distributed along the radial direction of the feed pipe 1.

[0012] Furthermore, a spiral water channel is arranged in the feed pipe, a cooling box and a liquid supply pump are installed in the support sleeve, the liquid supply pump is installed on the cooling box, and both ends of the spiral water channel are respectively connected to the cooling box and the liquid supply pump.

[0013] The beneficial effects of the present invention are as follows: the diameter at the material inlet can be changed by the diameter-changing mechanism, the flow rate and resistance of the material can be changed, thereby changing the pressure at the inlet, and avoiding cavitation caused by liquid vaporization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a magnetic pump for gas-liquid two-phase mixed transport in this embodiment;

[0015] Figure 2 Schematic diagram of a structure of the feed pipe mechanism in this embodiment;

[0016] Figure 3 is a side view of the diameter-changing mechanism in this embodiment;

[0017] Figure 4 is a cross-sectional view of the moving block in this embodiment;

[0018] Figure 5 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0019] Figure 6 for Figure 5 A magnified schematic diagram of center A.

[0020] Figure numerals: 1, shell; 2, fixed shell; 3, feeding cavity; 4, impeller; 5, feed port; 6, feed pipe mechanism; 7, discharge pipe; 8, transmission shaft; 9, magnetic block 1; 10, fixed cover; 11, installation cavity; 12, drive motor 1; 13, drive shaft; 14, magnetic frame; 15, magnetic block 2; 16, feed pipe 2; 17, feed pipe 1; 18, support sleeve; 19, diameter-changing mechanism; 20, moving block; 21, tightening block; 22, screw Rod; 23, transmission gear; 24, telescopic chamber; 25, support column; 26, sealing strip; 27, positioning hole; 28, positioning rod; 29, spring; 30, cooling box; 31, liquid supply pump; 32, sealing groove; 33, annular frame; 34, ring plate; 35, limit frame; 36, plane bearing; 37, limit seat; 38, gear ring one; 39, gear ring two; 40, drive motor two; 41, drive gear; 42, through hole; 43, spiral waterway. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1-Figure 6As shown, a magnetic pump for gas-liquid two-phase mixed transport comprises a shell 1 and a fixed shell 2, a feeding cavity 3 is formed between the shell 1 and the fixed shell 2, a feeding port 5 is provided on the side of the shell 1 away from the fixed shell 2, a feeding pipe mechanism 6 is connected to the feeding port 5, the feeding pipe mechanism 6 comprises a feeding pipe 17, a feeding pipe 2 16 and a supporting sleeve 18, the feeding pipe 1 17 and the feeding pipe 2 16 are coaxially arranged, one end of the supporting sleeve 18 is connected to the outer periphery of the shell 1, the other end of the supporting sleeve 18 is connected to the outer periphery of the feeding pipe 1 17, the feeding pipe 2 16 is connected to the shell 1, a reducing mechanism 19 is provided between the feeding pipe 1 17 and the feeding pipe 2 16, a discharge pipe 7 is provided on the side of the shell 1, the discharge pipe 7 is connected to the feeding cavity 3, and the feeding cavity 3 is provided. An impeller 4 is arranged in the material chamber 3, and a transmission shaft 8 is connected to the side of the impeller 4 away from the shell 1. The transmission shaft 8 is arranged through the fixed shell 2, and a sealing ring is arranged at the contact point between the fixed shell 2 and the transmission shaft 8. A fixed cover 10 is connected to the side of the fixed shell 2 away from the shell 1, and an installation cavity 11 is formed between the fixed cover 10 and the fixed shell 2. A magnetic block 9 is installed on the outer periphery of the transmission shaft 8, and also includes a driving motor 12. The driving motor 12 is driven and connected to a driving shaft 13. The other end of the driving shaft 13 extends into the installation cavity 11 and is connected to a magnetic frame 14. A magnetic block 2 15 matching with the magnetic block 1 9 is installed on the magnetic frame 14. An isolation cover is arranged in the installation cavity 11, and the magnetic block 1 9 and the magnetic block 2 15 are respectively located on the inner and outer sides of the isolation cover. The diameter-changing mechanism 19 includes a plurality of moving blocks 20, which are evenly distributed. Both sides of the moving blocks 20 are movably provided with abutting blocks 21, and the relatively close abutting blocks 21 of two adjacent moving blocks 20 abut against each other. The mechanism also includes a driving mechanism, which can drive the moving blocks 20 to move along the radial direction of the feed pipe 17. During the movement of the moving blocks 20, the abutting blocks 21 can also maintain the abutting state. The moving blocks 20 move inward in the radial direction, so that the inner ends of each moving block 20 are relatively close, and the diameter of the circle formed by the inner ends of the moving blocks 20 is reduced. The moving blocks 20 move outward in the radial direction, so that the inner ends of each moving block 20 are relatively far away, and the diameter of the circle formed by the inner ends of the moving blocks 20 is increased. By changing the diameter of the circle formed by the inner ends of the moving blocks 20, the diameter at the material inlet is changed. The diameter at the material inlet is increased as needed to reduce the flow rate and resistance, thereby increasing the pressure at the suction port, avoiding the inlet pressure being lower than the saturated vapor pressure of the liquid, and avoiding the cavitation caused by the vaporization of the liquid.

[0023] The abutting block 21 can be extended and retracted in the moving block 20 and maintain an abutting state with adjacent abutting blocks 21 , so that there is a good sealing performance between the two adjacent abutting blocks 21 .

[0024] The driving mechanism includes a screw rod 22 connected to the radial outer side of the moving block 20, a transmission gear 23 is threadedly connected to the screw rod 22, an annular frame 33 is installed on the inner side of the support sleeve 18, and a ring plate 34 is installed on the inner side of the annular frame 33. The end of the screw rod 22 is arranged through the ring plate 34, and a limit frame 35 is installed in the ring plate 34. The transmission gear 23 is located between the ring plate 34 and the limit frame 35. Planar bearings 36 are arranged between the transmission gear 23 and the ring plate 34, and between the transmission gear 23 and the limit frame 35. It also includes a driving motor 2 40 and a gear ring 1 38. Several transmission gears 23 are meshed with the gear ring 1 38, and the driving motor 2 40 can drive the gear ring 1 38 to rotate. A plurality of limiting seats 37 are installed in the annular frame 33, and a gear ring 1 38 is rotatably arranged on the limiting seats 37. A gear ring 2 39 is connected to the side of the gear ring 1 38 away from the transmission gear 23. A driving motor 2 40 is installed in the support sleeve 18. A driving gear 41 is connected to the driving motor 2 40. A driving gear 41 is provided on the annular frame 33 at a position corresponding to the driving gear 41. A part of the driving gear 41 is arranged through a through hole 42, and the driving gear 41 is meshed with the gear ring 2 39. The driving motor 2 40 drives the driving gear 41 to rotate, and the driving gear 41 drives the meshing gear ring 2 39 to rotate, and the gear ring 2 39 drives the gear ring 1 38 to rotate. The gear ring 1 38 drives the meshing transmission gears 23 to rotate. Since the screw rod 22 and the transmission gear 23 are threadedly connected, and the transmission gear 23 cannot move due to the limitation of the limiting frame 35 and the ring plate 34, the screw rod 22 can be lifted and lowered when the transmission gear 23 rotates. Thereby, the connected moving blocks 20 are driven to move, so as to change the distance between the inner ends of each moving block 20. Each transmission gear 23 rotates synchronously, so that the movement of each moving block 20 is also synchronous.

[0025] A telescopic cavity 24 is provided inside the moving block 20, a part of the pressing block 21 is located inside the telescopic cavity 24, and both ends of the pressing block 21 are in contact with the inner end of the telescopic cavity 24, which can play a guiding role and a sealing role. A support column 25 is provided inside the telescopic cavity 24, and a spring 29 is connected between the support column 25 and the pressing block 21. Due to the elastic force of the spring 29, the pressing block 21 has a tendency to move outward, so that the pressing block 21 can maintain a tight state.

[0026] A positioning hole 27 is formed inside the abutting block 21 . A positioning rod 28 is connected to the support column 25 . A portion of the positioning rod 28 is inserted into the positioning hole 27 . The cooperation between the positioning hole 27 and the positioning rod 28 guides the movement of the abutting block 21 .

[0027] A sealing strip 26 is installed on the outer side of the abutting block 21, and the setting of the sealing strip 26 can enhance the sealing between the abutting blocks 21. The sealing strips 26 on the abutting blocks 21 on both sides are staggered, which can make the sealing better.

[0028] A plurality of sealing grooves 32 are provided on one side of the feed pipe 17 close to the diameter-changing mechanism 19. The plurality of sealing grooves 32 are evenly distributed along the radial direction of the feed pipe 17. The arrangement of the sealing grooves 32 forms a labyrinth seal between the end faces of the feed pipe 17 and the moving block 20, so that there is good sealing between the feed pipe 17 and the moving block 20, and there is no leakage when the moving block 20 moves.

[0029] A spiral water channel 43 is provided in the feed pipe 17, a cooling box 30 and a liquid supply pump 31 are installed in the support sleeve 18, the liquid supply pump 31 is installed on the cooling box 30, and both ends of the spiral water channel 43 are respectively connected to the cooling box 30 and the liquid supply pump 31. The cooling box 30 can store coolant and perform refrigeration, and the liquid supply pump 31 can pump the coolant in the cooling box 30 into the spiral water channel 43, so that the temperature of the material flowing through the feed pipe 17 is reduced, and its saturated vapor pressure is reduced to avoid its vaporization.

[0030] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic pump for gas-liquid two-phase mixed transport, characterized in that: The invention comprises a shell (1) and a fixed shell (2), wherein a feeding cavity (3) is formed between the shell (1) and the fixed shell (2), a feeding port (5) is provided on a side of the shell (1) away from the fixed shell (2), a feeding pipe mechanism (6) is connected to the feeding port (5), the feeding pipe mechanism (6) comprises a feeding pipe 1 (17), a feeding pipe 2 (16) and a supporting sleeve (18), one end of the supporting sleeve (18) is connected to the outer periphery of the shell (1), the other end of the supporting sleeve (18) is connected to the outer periphery of the feeding pipe 1 (17), the feeding pipe 2 (16) is connected to the shell (1), a diameter reducing mechanism (19) is provided between the feeding pipe 1 (17) and the feeding pipe 2 (16), and a discharging port (19) is provided on the side of the shell (1). The invention relates to a tube (7), wherein an impeller (4) is arranged in the feeding cavity (3), and a transmission shaft (8) is connected to the side of the impeller (4) away from the shell (1), and the transmission shaft (8) passes through the fixed shell (2), and a fixed cover (10) is connected to the side of the fixed shell (2) away from the shell (1), and an installation cavity (11) is formed between the fixed cover (10) and the fixed shell (2), and a magnetic block (9) is installed on the outer periphery of the transmission shaft (8); and it also includes a driving motor (12), and the driving motor (12) is connected to a driving shaft (13), and the other end of the driving shaft (13) extends into the installation cavity (11) and is connected to a magnetic frame (14), and a magnetic block (15) matching with the magnetic block (9) is installed on the magnetic frame (14).

2. A magnetic pump for gas-liquid two-phase mixed transport according to claim 1, characterized in that: The diameter-changing mechanism (19) comprises a plurality of moving blocks (20) which are evenly distributed, and abutment blocks (21) are movably provided on both sides of the moving blocks (20), and the relatively close abutment blocks (21) of two adjacent moving blocks (20) are in abutment with each other, and also comprises a driving mechanism, and the driving mechanism can drive the moving blocks (20) to move along the radial direction of the feed pipe (17).

3. A magnetic pump for gas-liquid two-phase mixed transport according to claim 2, characterized in that: The driving mechanism comprises a screw rod (22) connected to the outside of the moving block (20), a transmission gear (23) being threadedly connected to the screw rod (22), an annular frame (33) being installed on the inner side of the support sleeve (18), an annular plate (34) being installed on the inner side of the annular frame (33), an end of the screw rod (22) passing through the annular plate (34) being arranged, a limiting frame (35) being installed in the annular plate (34), the transmission gear (23) being located between the annular plate (34) and the limiting frame (35), a plane bearing (36) being arranged between the transmission gear (23) and the annular plate (34), and between the transmission gear (23) and the limiting frame (35), and also comprises a second driving motor (40) and a first gear ring (38), a plurality of the transmission gears (23) being meshed with the first gear ring (38), and the second driving motor (40) being capable of driving the first gear ring (38) to rotate.

4. A magnetic pump for gas-liquid two-phase mixed transport according to claim 3, characterized in that: A plurality of limiting seats (37) are installed in the annular frame (33), the first gear ring (38) is rotatably arranged on the limiting seat (37), the first gear ring (38) is connected to the second gear ring (39) on the side away from the transmission gear (23), the second drive motor (40) is installed in the support sleeve (18), the second drive motor (40) is drivingly connected to the drive gear (41), the annular frame (33) is provided with a drive gear (41) at a position corresponding to the drive gear (41), a part of the drive gear (41) is arranged through the through hole (42), and the drive gear (41) is meshed with the second gear ring (39).

5. A magnetic pump for gas-liquid two-phase mixed transport according to claim 2, characterized in that: A telescopic cavity (24) is provided inside the moving block (20), a portion of the abutting block (21) is located inside the telescopic cavity (24), a support column (25) is provided inside the telescopic cavity (24), and a spring (29) is connected between the support column (25) and the abutting block (21).

6. A magnetic pump for gas-liquid two-phase mixed transport according to claim 5, characterized in that: A positioning hole (27) is provided on the inner side of the abutting block (21), a positioning rod (28) is connected to the supporting column (25), and a part of the positioning rod (28) is inserted into the positioning hole (27).

7. A magnetic pump for gas-liquid two-phase mixed transport according to claim 1, characterized in that: A plurality of sealing grooves (32) are provided on one side of the feed pipe (17) close to the diameter-changing mechanism (19), and the plurality of sealing grooves (32) are evenly distributed along the radial direction of the feed pipe (17).

8. The magnetic pump for gas-liquid two-phase mixed transport according to claim 1, characterized in that: A spiral water channel (43) is provided in the feed pipe (17), a cooling box (30) and a liquid supply pump (31) are installed in the support sleeve (18), the liquid supply pump (31) is installed on the cooling box (30), and both ends of the spiral water channel (43) are respectively connected to the cooling box (30) and the liquid supply pump (31).

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