A high-efficiency and energy-saving chemical process pump

Abstract

The present invention relates to the field of chemical transportation technology, and discloses a high-efficiency and energy-saving chemical process pump, including a pump body and a rear cover box on one side of the pump body, a runner is rotatably mounted on one end of the rear cover box, one side of the runner has an impeller component in a ring array, the pump body is used to seal and fit with the outer surface of one end of the rear cover box, the runner is used to rotate in the pump body, the impeller component includes curved blades, an intermediate shaft, a sealing rubber sleeve and a flip plate, the outer surface of one side of the runner is provided with an intermediate shaft, and the outer surface of one side of the intermediate shaft has curved blades in a ring array. The present invention reduces the startup hysteresis and power loss of the device by using a connection with a larger torque when the device is initially started, so that the device can select a suitable transmission ratio according to use to reduce the loss of kinetic energy and increase the flow rate without changing the speed, thereby achieving high efficiency and energy saving of the flow rate.

Description

Technical Field

[0001] The invention relates to the technical field of chemical transportation, in particular to a high-efficiency and energy-saving chemical process pump. Background Art

[0002] Chemical process pump is a general term for various pumps used in the chemical production process. The pump is equipped with high power, high speed, small overall size, simple structure, and easy maintenance, but it has high temperature, is easy to wear, and has a large maintenance coefficient. Therefore, it is relatively difficult to maintain and repair the pump. In order to reduce the number of overhauls, it is necessary to do a good job of equipment maintenance and repair.

[0003] The existing pump structure increases or decreases the water delivery by changing the rotation speed, but increasing the rotation speed will inevitably increase power consumption. In addition, the water pump lacks inertia during initial startup and requires a large torque, which will also cause greater power consumption and energy consumption at the moment of startup. Summary of the invention

[0004] The present invention provides a high-efficiency and energy-saving chemical process pump, which has the beneficial effect of energy saving and high efficiency when the pump body is working, and solves the existing pump body structure mentioned in the above background technology. The water delivery volume is increased or decreased by changing the rotation speed, but increasing the rotation speed will inevitably increase power consumption, and the water pump lacks inertia during initial startup and requires a large torque, which will also cause the power consumption at the startup moment and the energy consumption will increase.

[0005] The present invention provides the following technical solution: a high-efficiency and energy-saving chemical process pump, comprising a pump body and a rear cover box on one side of the pump body, a runner is rotatably mounted on one end of the rear cover box, one side of the runner has an impeller component in a circular array, the pump body is used to seal and fit with the outer surface of one end of the rear cover box, and the runner is used to rotate in the pump body;

[0006] The impeller component includes curved blades, an intermediate shaft, a sealing rubber sleeve and a flip plate. The outer surface of one side of the runner is provided with an intermediate shaft, and the outer surface of one side of the intermediate shaft is provided with curved blades in an annular array, and the upper end of the curved blade is rotatably mounted with a flip plate;

[0007] A sealing rubber sleeve is installed on the outer surface of the curved leaf, and the sealing rubber sleeve is used to seal the flip plate on the upper end of the curved leaf.

[0008] As an optional solution of the high-efficiency and energy-saving chemical process pump of the present invention, wherein: a flip plate is installed inside one end of each of the curved leaves, and the two flip plates are hingedly connected;

[0009] The flip plate has a flipping function, and the maximum flipping angle between the flip plate and the curved leaf is one hundred and forty-five degrees.

[0010] As an optional solution of the high-efficiency and energy-saving chemical process pump described in the present invention, the impeller component also includes a support shaft, a universal shaft, a limit stop and a first gear. The two support shafts are connected by a universal shaft. A limit stop is provided on the lower surface of the support shaft. The limit stop is used to limit the rotation angle of the flip plate. A first gear is provided at one end of the support shaft.

[0011] As an optional solution of the high-efficiency and energy-saving chemical process pump described in the present invention, a second gear is installed inside the intermediate shaft, and an inner transmission shaft is provided on the lower surface of the second gear, and the inner transmission shaft is used to provide rotational power for the support shaft.

[0012] As an optional solution for the high-efficiency and energy-saving chemical process pump described in the present invention, wherein: a transmission structure is fixedly installed inside the rear cover box, the transmission structure includes a first motor and a third gear, one end of the inner transmission shaft is provided with a third gear, and a first motor is also fixedly installed inside the rear cover box, and one end of the first motor is used for meshing connection with the third gear tooth groove.

[0013] As an optional solution of the high-efficiency and energy-saving chemical process pump of the present invention, wherein: a speed change structure located above the inner transmission shaft is installed inside the rear cover box, the speed change structure includes a rotating main shaft, a transmission wheel and a third driving wheel, the outer surface of the rotating main shaft is installed with a transmission wheel, and the outer surface of one end of the rotating main shaft is provided with a third driving wheel;

[0014] The transmission structure also includes an outer transmission shaft, a first driving wheel and an elastic connecting belt. The outer surface of the other side of the rotating wheel is provided with an outer transmission shaft, and the outer transmission shaft is used to rotatably install the rotating wheel on one end of the rear cover box. The outer transmission shaft is used to rotate on the outside of the inner transmission shaft. The inner transmission shaft and the outer transmission shaft are connected to the inner wall of the rear cover box through bearings. An elastic connecting belt is installed on the outside of the first driving wheel, and the elastic connecting belt is used to transmit the rotational force between the transmission wheel and the first driving wheel.

[0015] As an optional solution of the high-efficiency and energy-saving chemical process pump of the present invention, wherein: the outer surface of the driving wheel is provided with three sections of outer annular surfaces, and the outer surface of each section of the outer annular surface is provided with a limiting arc groove;

[0016] The cross sections of the three outer annular surfaces are in a stepped inclined state, and the diameter of each section of the outer annular surface tends to gradually decrease.

[0017] As an optional solution of the high-efficiency and energy-saving chemical process pump of the present invention, wherein: the speed change structure also includes a limiting arc groove, a supporting inner ring, a threaded shaft and a connecting ring, the outer side of the rotating main shaft is symmetrically provided with a transverse groove, the inner rotation of the transmission wheel is connected with the supporting inner ring, the inner part of the supporting inner ring is provided with a connecting ring, the inner rotation of the rotating main shaft is provided with a threaded shaft, and the threaded shaft is used to engage with the internal thread of the connecting ring;

[0018] The transmission wheel slides transversely on the outer surface of the rotating main shaft through the supporting inner ring, the supporting inner ring and the transmission wheel are connected by a bearing, the third driving wheel includes an inner ring and an outer ring, the inner ring and the outer ring are connected by a bearing, one end of the transmission wheel is provided with a limiting cross bar, the limiting cross bar is used to pass through the inner side of the outer ring, and the limiting cross bar is used to provide rotation support for the third driving wheel and the transmission wheel;

[0019] A second motor is installed at one end of the rotating main shaft, and the second motor is used to provide a rotational force for the threaded shaft. A telescopic shaft is rotatably installed at the other end of the rotating main shaft, and the telescopic shaft is used to provide a support function when the rotating main shaft rotates.

[0020] The telescopic shaft comprises an inner shaft and an outer shaft, and the inner shaft and the outer shaft are connected in a sliding groove.

[0021] As an optional solution of the high-efficiency and energy-saving chemical process pump of the present invention, wherein: a push rod component located on the side of the telescopic shaft is installed on one side of the inner wall of the rear cover box, and the push rod component includes an outer rod, an inner rod, a limit sleeve and a drive shaft, and the inner rod is slidably installed inside the outer rod, and a limit sleeve is provided at one end of the inner rod, and the limit sleeve is used to be sleeved on the outer surface of the elastic connecting belt, and the inner rod is also rotatably installed with a drive shaft, and the drive shaft is used to be threadedly engaged with the inner rod;

[0022] A small motor is fixedly mounted on one side of the driving shaft, and the small motor is used to drive the driving shaft to rotate.

[0023] As an optional solution of the high-efficiency and energy-saving chemical process pump described in the present invention, an external shaft is also installed at the other end of the rear cover box, a second driving wheel is provided at one end of the external shaft, and the second driving wheel and the third driving wheel are driven by an elastic connecting belt.

[0024] The present invention has the following beneficial effects:

[0025] The high-efficiency and energy-saving chemical process pump utilizes the flipping effect of the flip plate so that the impeller component as a whole provides a centrifugal effect on the water flow while its tilted state can press the liquid toward between the two curved blades, thereby further increasing the water intake on the basis of the curved blades, so that the water intake when the liquid enters the pump body is greater, and when the impeller rotates, the transmission ratio between the transmission wheel and the first driving wheel can be adjusted according to the water intake of the curved blades and the flip plate, so that at the initial start-up of the device, a larger torque connection can be used to reduce the start-up lag and power loss of the device, so that the device can select a suitable transmission ratio according to use to reduce kinetic energy loss and increase the flow rate when the speed remains unchanged, thereby achieving high efficiency and energy saving of the flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the internal structure of the rear cover box of the present invention.

[0028] Figure 3 It is an overall schematic diagram of the speed shifting structure of the present invention.

[0029] Figure 4 It is a schematic diagram of the structure of the impeller component of the present invention.

[0030] Figure 5 It is a schematic diagram of the curved leaf structure of the present invention.

[0031] Figure 6 It is a schematic diagram of the flip plate structure of the present invention.

[0032] In the figure: 1. pump body; 2. rear cover box; 3. impeller; 4. impeller component; 41. curved blade; 42. support shaft; 43. universal shaft; 44. sealing rubber sleeve; 45. flip plate; 46. limit stopper; 47. first gear; 48. second gear; 49. inner transmission shaft; 50. intermediate shaft; 5. transmission structure; 51. outer transmission shaft; 52. first drive wheel; 53. elastic connecting belt; 54. external shaft; 55. second drive wheel; 57. first motor; 58. third gear; 6. speed change structure; 61. rotating main shaft; 62. transmission wheel; 63. limit arc groove; 64. support inner ring; 65. threaded shaft; 66. connecting ring; 67. third drive wheel; 68. telescopic shaft; 69. second motor; 7. push rod component; 71. outer rod; 72. inner rod; 73. limit sleeve; 74. drive shaft. DETAILED DESCRIPTION

[0033] 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.

[0034] Example 1

[0035] See also Figure 1-Figure 6 , one of which is a high-efficiency and energy-saving chemical process pump, comprising a pump body 1 and a rear cover box 2 on one side of the pump body 1, a runner 3 is rotatably mounted on one end of the rear cover box 2, and an impeller component 4 is arranged in a ring array on one side of the runner 3, the pump body 1 is used to seal and fit with the outer surface of one end of the rear cover box 2, and the runner 3 is used to rotate in the pump body 1;

[0036] The impeller component 4 includes a curved blade 41, an intermediate shaft 50, a sealing rubber sleeve 44 and a flip plate 45. The outer surface of one side of the runner 3 is provided with an intermediate shaft 50. The outer surface of one side of the intermediate shaft 50 is provided with a circular array of curved blades 41. The upper end of the curved blade 41 is rotatably mounted with a flip plate 45.

[0037] A sealing rubber sleeve 44 is installed on the outer surface of the curved leaf 41, and the sealing rubber sleeve 44 is used to seal the flip plate 45 on the upper end of the curved leaf 41;

[0038] A flip plate 45 is installed inside one end of the curved leaf 41, and the two flip plates 45 are hingedly connected;

[0039] The flip plate 45 has a flipping function, and the maximum flipping angle between the flip plate 45 and the curved leaf 41 is one hundred and forty-five degrees;

[0040] The impeller component 4 further includes a support shaft 42, a universal shaft 43, a limit stopper 46 and a first gear 47. The two support shafts 42 are connected via the universal shaft 43. A limit stopper 46 is provided on the lower surface of the support shaft 42. The limit stopper 46 is used to limit the rotation angle of the flip plate 45. One end of the support shaft 42 is provided with a first gear 47.

[0041] A second gear 48 is installed inside the intermediate shaft 50, and an inner transmission shaft 49 is provided on the lower surface of the second gear 48. The inner transmission shaft 49 is used to provide rotational power for the support shaft 42;

[0042] A transmission structure 5 is fixedly installed inside the rear cover box 2, and the transmission structure 5 includes a first motor 57 and a third gear 58. The third gear 58 is provided at one end of the inner transmission shaft 49. The first motor 57 is also fixedly installed inside the rear cover box 2, and one end of the first motor 57 is used for meshing connection with the third gear 58.

[0043] When in use, the third gear 58 is driven to rotate through the connection between the first motor 57 and the third gear 58. The third gear 58 drives the inner transmission shaft 49 to rotate while rotating, and the inner transmission shaft 49 drives the second gear 48 to rotate, and the second gear 48 drives the first gear 47 to rotate. When the first gear 47 rotates, it drives one of the support shafts 42 to rotate. When one of the support shafts 42 rotates, the power is transmitted to the other support shaft 42 through the universal shaft 43, so that the two support shafts 42 have the function of rotation.

[0044] When the support shaft 42 has the function of rotating, the support shaft 42 can drive the flip plate 45 to flip at an angle. Figure 4 As shown, the impeller component 4 rotates clockwise, and the flip plate 45 flips in the clockwise direction;

[0045] The rotation of the flip plate 45 provides a stirring and rotating effect on the incoming liquid, and generates centrifugal force, so that the liquid entering between each two curved leaves 41 is thrown toward the outer end of the curved leaf 41, and finally sent out through the pipeline at the upper end of the pump body 1. By flipping the flip plate 45, the curved leaf 41 is tilted when providing centrifugal force to the liquid, which can have a stirring effect on the liquid and stir the liquid toward between the two curved leaves 41, providing a driving force on the liquid, so that the amount of water collected when the liquid enters the interior of the pump body 1 is larger, and the device can adjust the flip angle of the flip plate 45 according to the usage. Changing the flip angle can change the amount of water collected when the liquid is stirred, thereby further increasing the device delivery flow rate on the existing basis, thereby making the device delivery more efficient.

[0046] Example 2

[0047] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1-Figure 6 The rear cover box 2 is internally provided with a speed change structure 6 located above the inner transmission shaft 49, the speed change structure 6 comprises a rotating main shaft 61, a transmission wheel 62 and a third driving wheel 67, the transmission wheel 62 is installed on the outer surface of the rotating main shaft 61, and the outer surface of one end of the rotating main shaft 61 is provided with a third driving wheel 67;

[0048] The transmission structure 5 also includes an outer transmission shaft 51, a first driving wheel 52 and an elastic connecting belt 53. The outer surface of the other side of the rotating wheel 3 is provided with an outer transmission shaft 51, and the outer transmission shaft 51 is used to rotatably install the rotating wheel 3 on one end of the rear cover box 2. The outer transmission shaft 51 is used to rotate on the outer side of the inner transmission shaft 49. The inner transmission shaft 49 and the outer transmission shaft 51 are connected to the inner wall of the rear cover box 2 through bearings. An elastic connecting belt 53 is installed on the outer side of the first driving wheel 52, and the elastic connecting belt 53 is used to transmit the rotational force between the transmission wheel 62 and the first driving wheel 52.

[0049] The outer surface of the transmission wheel 62 is provided with three sections of outer ring surfaces, and the outer surface of each section of the outer ring surface is provided with a limiting arc groove 63;

[0050] The cross sections of the three outer ring surfaces are in a stepped inclined state, and the diameter of each section of the outer ring surface tends to gradually decrease;

[0051] The speed change structure 6 also includes a limiting arc groove 63, a supporting inner ring 64, a threaded shaft 65 and a connecting ring 66. The outer side of the rotating main shaft 61 is symmetrically provided with transverse grooves, the inner side of the transmission wheel 62 is rotatably connected with the supporting inner ring 64, the inner side of the supporting inner ring 64 is provided with a connecting ring 66, and the inner side of the rotating main shaft 61 is rotatably installed with a threaded shaft 65, and the threaded shaft 65 is used to be meshed with the inner thread of the connecting ring 66.

[0052] The transmission wheel 62 slides transversely on the outer surface of the rotating main shaft 61 through the supporting inner ring 64. The supporting inner ring 64 and the transmission wheel 62 are connected by a bearing. The third driving wheel 67 includes an inner ring and an outer ring. The inner ring and the outer ring are connected by a bearing. A limiting cross bar is provided at one end of the transmission wheel 62. The limiting cross bar is used to pass through the inner side of the outer ring. The limiting cross bar is used to provide rotation support for the third driving wheel 67 and the transmission wheel 62.

[0053] A second motor 69 is installed at one end of the rotating main shaft 61, and the second motor 69 is used to provide a rotational force for the threaded shaft 65. A telescopic shaft 68 is rotatably installed at the other end of the rotating main shaft 61, and the telescopic shaft 68 is used to provide a support function when the rotating main shaft 61 rotates;

[0054] The telescopic shaft 68 includes an inner shaft and an outer shaft, and the inner shaft and the outer shaft are connected in a sliding groove;

[0055] A push rod component 7 located on the side of the telescopic shaft 68 is installed on one side of the inner wall of the rear cover box 2. The push rod component 7 includes an outer rod 71, an inner rod 72, a limit sleeve 73 and a drive shaft 74. The inner rod 72 is slidably installed inside the outer rod 71. A limit sleeve 73 is provided at one end of the inner rod 72. The limit sleeve 73 is used to be sleeved on the outer surface of the elastic connecting belt 53. A drive shaft 74 is also rotatably installed inside the outer rod 71. The drive shaft 74 is used to be threadedly engaged with the inner rod 72.

[0056] A small motor is fixedly mounted on one side of the driving shaft 74, and the small motor is used to drive the driving shaft 74 to rotate;

[0057] An external shaft 54 ​​is also installed at the other end of the rear cover box 2 , and a second driving wheel 55 is provided at one end of the external shaft 54 ​​. The second driving wheel 55 and the third driving wheel 67 are driven by an elastic connecting belt 53 .

[0058] The outer ring 54 is connected to the external drive device through the external shaft 54. When the outer ring 54 rotates, the outer ring is driven to rotate through the elastic connecting belt 53. The second driving wheel 55 is connected to the outer ring through the elastic connecting belt 53. When the outer ring rotates, the transmission wheel 62 is driven to rotate together through the connection effect of the limiting cross bar, so that the elastic connecting belt 53 can transmit the rotational force of the transmission wheel 62 to the outer transmission shaft 51.

[0059] At this time, the threaded shaft 65 is driven to rotate by the second motor 69, so that the threaded shaft 65 cooperates with the connecting ring 66 when rotating, and drives the supporting inner ring 64 to slide inside the rotating main shaft 61 through the connection effect of the two. When the supporting inner ring 64 slides, the transmission wheel 62 slides at the same time, and when the transmission wheel 62 slides, the upper end of the elastic connecting belt 53 can be inserted into the limiting arc groove 63 at the current position according to the sliding position of the transmission wheel 62. The limiting effect of the limiting sleeve 73 on the elastic connecting belt 53 keeps the position of the elastic connecting belt 53 unchanged. Through the multiple diameter designs of the limiting arc groove 63, the transmission ratio will change when transmitting with the first driving wheel 52. When the diameter of the limiting arc groove 63 is larger than that of the first driving wheel 52, the transmission efficiency becomes larger and the torque becomes smaller. On the contrary, the transmission efficiency becomes smaller and the torque becomes larger.

[0060] Therefore, during the initial startup of the device, a smaller diameter limiting arc groove 63 can be selected, and a larger torque can be used to quickly start the device. When the subsequent speed increases, its transmission efficiency can be increased, and the speed can be faster, so that it can be used in conjunction with the impeller component 4. During the initial startup, the flip plate 45 can be selected at a suitable angle to reduce the resistance of the water flow during startup. After the speed increases, the limiting arc groove 63 at a suitable position can be selected for transmission.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-efficiency and energy-saving chemical process pump, comprising a pump body (1) and a rear cover box (2) on one side of the pump body (1), characterized in that: A runner (3) is rotatably mounted on one end of the rear cover box (2), and an impeller component (4) is arranged in a ring array on one side of the runner (3); the pump body (1) is used to seal and fit with the outer surface of one end of the rear cover box (2), and the runner (3) is used to rotate inside the pump body (1); The impeller component (4) comprises a curved blade (41), an intermediate shaft (50), a sealing rubber sleeve (44) and a flip plate (45); the outer surface of one side of the runner (3) is provided with an intermediate shaft (50); the outer surface of one side of the intermediate shaft (50) is provided with curved blades (41) in an annular array; the upper end of the curved blade (41) is rotatably mounted with a flip plate (45); A sealing rubber sleeve (44) is installed on the outer surface of the curved leaf (41), and the sealing rubber sleeve (44) is used to seal the flip plate (45) on the upper end of the curved leaf (41).

2. The high-efficiency and energy-saving chemical process pump according to claim 1 is characterized in that: A flip plate (45) is installed inside one end of each curved leaf (41), and the two flip plates (45) are hingedly connected; The flip plate (45) has a flipping function, and the maximum flipping angle between the flip plate (45) and the curved leaf (41) is one hundred and forty-five degrees.

3. The high-efficiency and energy-saving chemical process pump according to claim 2 is characterized in that: The impeller component (4) further comprises a support shaft (42), a universal shaft (43), a limit stopper (46) and a first gear (47); the two support shafts (42) are connected via the universal shaft (43); a limit stopper (46) is provided on the lower surface of the support shaft (42); the limit stopper (46) is used to limit the rotation angle of the flip plate (45); and a first gear (47) is provided at one end of the support shaft (42).

4. The high-efficiency and energy-saving chemical process pump according to claim 3 is characterized in that: A second gear (48) is installed inside the intermediate shaft (50), and an inner transmission shaft (49) is provided on the lower surface of the second gear (48). The inner transmission shaft (49) is used to provide rotational power for the support shaft (42).

5. The high-efficiency and energy-saving chemical process pump according to claim 4 is characterized in that: A transmission structure (5) is fixedly installed inside the rear cover box (2), and the transmission structure (5) includes a first motor (57) and a third gear (58). One end of the inner transmission shaft (49) is provided with a third gear (58). The first motor (57) is also fixedly installed inside the rear cover box (2), and one end of the first motor (57) is used for meshing connection with the third gear (58).

6. The high-efficiency and energy-saving chemical process pump according to claim 5 is characterized in that: A speed change structure (6) located above the inner transmission shaft (49) is installed inside the rear cover box (2), and the speed change structure (6) includes a rotating main shaft (61), a transmission wheel (62) and a third driving wheel (67), the transmission wheel (62) is installed on the outer surface of the rotating main shaft (61), and the outer surface of one end of the rotating main shaft (61) is provided with a third driving wheel (67); The transmission structure (5) further comprises an outer transmission shaft (51), a first driving wheel (52) and an elastic connecting belt (53); the outer surface of the other side of the rotating wheel (3) is provided with an outer transmission shaft (51); the outer transmission shaft (51) is used to rotatably mount the rotating wheel (3) on one end of the rear cover box (2); the outer transmission shaft (51) is used to rotate on the outside of the inner transmission shaft (49); the inner transmission shaft (49) and the outer transmission shaft (51) are connected to the inner wall of the rear cover box (2) via bearings; an elastic connecting belt (53) is installed on the outside of the first driving wheel (52); the elastic connecting belt (53) is used to transmit the rotational force between the transmission wheel (62) and the first driving wheel (52).

7. The high-efficiency and energy-saving chemical process pump according to claim 6, characterized in that: The outer surface of the transmission wheel (62) is provided with three sections of outer annular surfaces, and the outer surface of each section of the outer annular surface is provided with a limiting arc groove (63); The cross sections of the three outer annular surfaces are in a stepped inclined state, and the diameter of each section of the outer annular surface tends to gradually decrease.

8. The high-efficiency and energy-saving chemical process pump according to claim 7, characterized in that: The speed change structure (6) further comprises a limiting arc groove (63), a supporting inner ring (64), a threaded shaft (65) and a connecting ring (66); the outer side of the rotating main shaft (61) is symmetrically provided with a transverse groove; the inner part of the transmission wheel (62) is rotatably connected with the supporting inner ring (64); the inner part of the supporting inner ring (64) is provided with a connecting ring (66); the inner part of the rotating main shaft (61) is rotatably installed with a threaded shaft (65); the threaded shaft (65) is used to be meshed with the inner thread of the connecting ring (66); The transmission wheel (62) slides transversely on the outer surface of the rotating main shaft (61) through the supporting inner ring (64), the supporting inner ring (64) and the transmission wheel (62) are connected through a bearing, the third driving wheel (67) comprises an inner ring and an outer ring, the inner ring and the outer ring are connected through a bearing, one end of the transmission wheel (62) is provided with a limiting cross bar, the limiting cross bar is used to pass through the inner side of the outer ring, and the limiting cross bar is used to provide rotation support for the third driving wheel (67) and the transmission wheel (62); A second motor (69) is mounted on one end of the rotating main shaft (61), and the second motor (69) is used to provide a rotational force for the threaded shaft (65). A telescopic shaft (68) is rotatably mounted on the other end of the rotating main shaft (61), and the telescopic shaft (68) is used to provide a support function when the rotating main shaft (61) rotates. The telescopic shaft (68) comprises an inner shaft and an outer shaft, and the inner shaft and the outer shaft are connected in a sliding groove.

9. The high-efficiency and energy-saving chemical process pump according to claim 8, characterized in that: A push rod component (7) located on the side of the telescopic shaft (68) is installed on one side of the inner wall of the rear cover box (2), and the push rod component (7) includes an outer rod (71), an inner rod (72), a limiting sleeve (73) and a driving shaft (74). The inner rod (72) is slidably installed inside the outer rod (71), and a limiting sleeve (73) is provided at one end of the inner rod (72). The limiting sleeve (73) is used to be sleeved on the outer surface of the elastic connecting belt (53). A driving shaft (74) is also rotatably installed inside the outer rod (71), and the driving shaft (74) is used to be threadedly engaged with the inner rod (72); A small motor is fixedly mounted on one side of the driving shaft (74), and the small motor is used to drive the driving shaft (74) to rotate.

10. The high-efficiency and energy-saving chemical process pump according to claim 9, characterized in that: The other end of the rear cover box (2) is also equipped with an external shaft (54), one end of the external shaft (54) is provided with a second driving wheel (55), and the second driving wheel (55) and the third driving wheel (67) are driven by an elastic connecting belt (53).

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