Chemical energy-saving water pump

Abstract

The invention discloses a chemical energy-saving water pump, which relates to the technical field of centrifugal pumps, and comprises a pump body, a lifting pipe fixedly arranged on the pump body, and a convergent opening arranged in the lifting pipe. According to the chemical energy-saving type water pump, scale flowing along the inner wall of the lifting pipe is effectively retained and filtered through the hopper-shaped part defined by the filter leaf set, then the scale blocks the filter holes, the filter leaf set is converted into a closed face, and a relative space is formed between a wide opening of the hopper-shaped part defined by the filter leaf set and a wide part of the collecting opening; scale in hot water is automatically detained in a relative space and sucked into the detachable collecting barrel, after the valve is closed, the pump body does not need to stop rotating, the check window arranged on the detachable collecting barrel can be opened to clean the intercepted scale, the cooled water flow cools the rotating shaft through the backflow channel, a temperature transition area is formed, and the temperature of the water flow is reduced. The stepped cooling effect is achieved, and the forming probability of fatigue cracks is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal pumps, in particular to a chemical energy-saving water pump. Background Art

[0002] In chemical production processes, especially in cooling water circulation systems, energy-saving motors and centrifugal pumps are often used to lift high-temperature hot water after heat exchange into a spray tower. High-pressure spraying then forms a water film on the packing below, effectively exchanging heat and cooling the circulating water. Due to the high temperature of the circulating water, the solubility of salts in the water generally decreases with increasing temperature, making precipitation more likely at high temperatures. Furthermore, the portion of the shaft that drives the impeller directly contacts the hot water for heat exchange, resulting in uneven heating during the energy-saving motor's output, potentially affecting energy efficiency.

[0003] In conjunction with publication number CN115234510A, publication date 2022-10-25, an impeller for a centrifugal pump and a centrifugal pump are disclosed, including a rear cover plate, a front side surface of the rear cover plate is annularly and equidistantly fixedly connected with a plurality of blades, and the blades are in an arc-shaped structure, and an adjustment mechanism is provided at the center position of the front side surface of the rear cover plate. The impeller for a centrifugal pump and the centrifugal pump adjust the output length of the telescopic blades through the adjustment mechanism to adjust the diameter of the impeller, thereby adjusting the flow rate of the centrifugal pump, avoiding the increase of water flow resistance caused by adjusting the opening of the water outlet valve for flow regulation, reducing mechanical losses in the waterway, and improving the efficiency of the centrifugal pump; a filter screen is provided in the water inlet pipe to filter solid particulate impurities in the water, avoiding the solid particulate impurities from colliding with the impeller for a long time and damaging the impeller, and the centrifugal pump drives the rotating rod to rotate while driving the scraper to rotate, thereby scraping the outer surface of the filter screen.

[0004] However, in the prior art including the above-mentioned patents, the scale after scraping still remains inside the pump body, and the pump body needs to be stopped to remove the scale. However, the cooling water circulation system in the actual production process is often in continuous operation, and the economic loss of stopping is large. When the pump body is in continuous operation, the first end of the shaft is always in contact with hot water. During the contact process, the shaft gradually heats up due to the heat exchange with the hot water. The calcium bicarbonate in the water is originally soluble, but when heated, it will decompose into insoluble calcium carbonate, further generating scale that adheres to the surface of the impeller, increasing the surface area of the impeller, increasing the resistance of the water to the impeller, and increasing the weight of the impeller. Therefore, it is necessary to increase the output power of the shaft to adapt to the situation, which indirectly increases the energy consumption of the motor. The heat dissipation module set inside the energy-saving motor will dissipate heat from the second end of the shaft, resulting in uneven heat at both ends of the shaft. The thermal stress is concentrated on the first end, which is prone to fatigue cracks. Summary of the Invention

[0005] The purpose of the present invention is to provide a chemical energy-saving water pump to solve the above problems.

[0006] To achieve the above object, the present invention provides the following technical solution: a chemical energy-saving water pump, including a pump body and a lifting pipe fixedly arranged thereon, and a rotating shaft assembled on an energy-saving motor and used to drive the impeller to rotate, including a converging port arranged in the lifting pipe and having an inner diameter decreasing along the liquid outlet direction; A filter blade unit arranged at the connection between the pump body and the lifting pipe, which includes a plurality of filter blade groups arranged in a circumferential array, and the wide mouth of the funnel-shaped part formed by enclosing the filter blade groups is adjacent to the wide part of the converging port; A suction port located between the filter blade unit and the converging port, which is coaxial with the lifting pipe; A detachable collection cylinder arranged on the pump body, which is communicated with the suction port; A reflux channel nested on the rotating shaft, which is used to guide the liquid discharged from the detachable collection cylinder back to the pump body.

[0007] Preferably, a spiral plate is arranged in the reflux channel.

[0008] Preferably, an S-bend pipe is communicated between the detachable collection cylinder and the reflux channel.

[0009] Preferably, each of the filter blade groups is rotatably arranged, and the filter screen area formed after rotation increases.

[0010] Preferably, each filter blade group includes a lower filter screen and an upper filter screen arranged in sequence along the liquid outlet direction.

[0011] Preferably, the filter holes of the lower filter screen and the upper filter screen are staggered to form a fouling surface.

[0012] Preferably, the upper filter screen is movably arranged on the lower filter screen and maintains a predetermined distance, and spikes shorter than the distance length are arranged on the upper filter screen.

[0013] Preferably, it further includes a sliding rod arranged at the center of the filter blade group, a cable is arranged on the sliding rod, and the cable is tightened by the rotation of the sliding rod to adjust the thickness of the filter blade group.

[0014] Preferably, it further includes a fixing frame for supporting the filter blade group, and the cable is fixedly connected to the fixing frame.

[0015] Preferably, it further includes a detection unit arranged in the suction port, and the detection unit includes a floating ball, which has an open position with the maximum distance from the suction port.

[0016] In the above technical solution, a chemical energy-saving water pump provided by the present invention has the following beneficial effects: The filter blade group encloses to form a bucket-shaped part to effectively retain and filter the water scale flowing along the inner wall of the lifting pipe. Subsequently, the water scale blocks the filter holes, and the filter blade group is transformed into a closed surface. A relative space is formed between the wide mouth and the wide part of the converging mouth of the bucket-shaped part enclosed by the filter blade group, so that the water scale in the hot water automatically stays in the relative space and is sucked into the detachable collection cylinder. After closing the valve, it is not necessary to stop the pump body to open the inspection window provided on the detachable collection cylinder to clean the intercepted water scale. The cooled water flow cools the rotating shaft through the return channel to form a temperature transition area, achieving the effect of stepwise cooling and reducing the formation probability of fatigue cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 The overall three-dimensional schematic diagram provided by the embodiment of the present invention; Figure 2 The internal structure schematic diagram of the lifting pipe provided by the embodiment of the present invention; Figure 3 The structural schematic diagram of the filter blade unit when not rotated provided by the embodiment of the present invention; Figure 4 The plan view of the filter blade unit when not rotated provided by the embodiment of the present invention; Figure 5 The structural schematic diagram of the filter blade unit after rotation provided by the embodiment of the present invention; Figure 6 The plan view of the filter blade unit after rotation provided by the embodiment of the present invention; Figure 7 The structural schematic diagram of the filter blade unit provided by the embodiment of the present invention; Figure 8 The structural schematic diagram of the filter blade group provided by the embodiment of the present invention; Figure 9 The filter screen schematic diagram of the filter blade group provided by the embodiment of the present invention; Figure 10 The structural schematic diagram of the filter blade group and the sliding rod provided by the embodiment of the present invention; Figure 11 The structural schematic diagram of the return channel provided by the embodiment of the present invention; Figure 12 The structural schematic diagram of the S-bend pipe provided by the embodiment of the present invention.

[0019] Description of the reference numerals: 1. Pump body; 11. Liquid inlet; 2. Lifting pipe; 3. Liquid outlet; 31. Converging port; 4. Removable collection cylinder; 41. Suction port; 42. Floating ball; 43. S-shaped pipe; 44. Return channel; 45. Spiral plate; 46. Filter plate; 47. Electric telescopic rod; 5. Rotating shaft; 6. Filter leaf unit; 61. Fixed frame; 62. Filter leaf group; 621. Upper filter screen; 622. Lower filter screen; 623. Upper filter hole; 624. Lower filter hole; 625. Spikes; 63. Slide bar; 64. Rotating bar; 65. Universal shaft; 66. Elastic member; 67. Cable. Detailed implementation mode

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below with reference to the accompanying drawings.

[0021] As Figure 1 - Figure 12 shown, a chemical energy-saving water pump includes a pump body 1 and a lifting pipe 2 fixedly arranged thereon, and a rotating shaft 5 (as Figure 11 shown) assembled on an energy-saving motor and used to drive the impeller to rotate, and includes a converging port 31 arranged in the lifting pipe 2 and having an inner diameter decreasing along the liquid outlet direction; As Figure 2 - Figure 10 shown, a filter leaf unit 6 is arranged at the connection between the pump body 1 and the lifting pipe 2, which includes a plurality of filter leaf groups 62 arranged in a circumferential array, and the wide mouth of the funnel-shaped part formed by enclosing the filter leaf groups 62 is adjacent to the wide part of the converging port 31; A suction port 41 located between the filter leaf unit 6 and the converging port 31 is coaxial with the lifting pipe 2; A removable collection cylinder 4 is arranged on the pump body 1 and is communicated with the suction port 41; A return channel 44 nested on the rotating shaft 5 (combined with Figure 1 and Figure 11 ) is used to guide the liquid discharged from the removable collection cylinder 4 back to the pump body 1.

[0022] Specifically, the pump body 1 is a centrifugal pump, which has a liquid inlet 11 pointing to the axis of the pump body 1, and the upper port of the lifting pipe 2 is the liquid outlet 3. After the hot water enters the pump body 1 through the liquid inlet 11, it enters the lifting pipe 2 under the action of centrifugal force when the impeller rotates. During this process, the scale in the hot water will be thrown to the inner wall of the pump body 1 by the centrifugal force, and then converge on the inner wall of the lifting pipe 2 along the inner wall of the pump body 1. An inspection window that can be opened is provided on the removable collection cylinder 4.

[0023] Furthermore, as Figure 3 shown, the filter leaf group 62 encloses a funnel-shaped part, and the narrow mouth of the funnel-shaped part faces the liquid inlet direction of the lifting pipe 2. So that an upward angle is formed between the funnel-shaped part and the inner wall of the lifting pipe 2 (asFigure 3 As shown in the figure, this included angle can effectively retain and filter the scale flowing along the inner wall of the riser 2, causing the scale to stay on the bottom side of the filter vane group 62. After long-term use, the filter holes are blocked by the scale, and the filter vane group 62 is transformed into a closed surface (as Figure 5 shown in the figure). It is difficult for water flow to pass through the filter vane group 62, so the water will flow upward from the narrow opening of the funnel-shaped part. At this time, a space of narrow opening of the filter vane group 62 - wide opening of the filter vane group 62 - wide part of the converging port 31 - narrow part of the converging port 31 is formed from bottom to top in the riser 2, making the flow cross-section of the hot water change from narrow to wide and then to narrow, and the corresponding flow velocity change from fast to slow and then to fast. A relative space is formed between the wide opening of the funnel-shaped part enclosed by the filter vane group 62 and the wide part of the converging port 31. The flow velocity of the water in this space is relatively slow, and the water flow flowing along the upper side of the filter vane group 62 is blocked by the inclined wall of the converging port 31 when continuing to flow upward, generating a small eddy current, so that the scale in the hot water is automatically retained in the relative space.

[0024] Subsequently, the hot water in the relative space is sucked through the suction port 41. The hot water enters the detachable collection cylinder 4 through the suction port 41. A filter plate 46 is arranged in the detachable collection cylinder 4 to filter the hot water. During the filtering process, since the hot water exchanges heat with the detachable collection cylinder 4, the temperature of the hot water drops. After the reflux liquid exchanges heat with the external cooling medium through the S-bend pipe 43, a stepped temperature zone is formed through the reflux channel 44, gradually reducing the surface temperature of the rotating shaft 5, avoiding local heating of the rotating shaft 5 directly in the pump body 1 to generate thermal stress, and reducing the formation probability of fatigue cracks. Opening and closing valves are arranged at both ends of the detachable collection cylinder 4. By closing the opening and closing valves at both ends, the detachable collection cylinder 4 is separated from the pump body 1, and then the inspection window arranged on the detachable collection cylinder 4 is opened to clean the intercepted scale.

[0025] In the above technology, the scale flowing along the inner wall of the riser 2 is effectively retained and filtered by the funnel-shaped part enclosed by the filter vane group 62. Subsequently, the filter holes are blocked by the scale, and the filter vane group 62 is transformed into a closed surface. A relative space is formed between the wide opening of the funnel-shaped part enclosed by the filter vane group 62 and the wide part of the converging port 31, so that the scale in the hot water is automatically retained in the relative space and sucked into the detachable collection cylinder 4. After closing the valve, it is not necessary to stop the pump body 1 to open the inspection window arranged on the detachable collection cylinder 4 to clean the intercepted scale. The cooled water flow cools the rotating shaft 5 through the reflux channel 44, forming a temperature transition region, achieving the effect of stepped cooling and reducing the formation probability of fatigue cracks.

[0026] As an embodiment provided by the present invention, a spiral plate 45 is arranged in the reflux channel 44.

[0027] Specifically, the spiral plate 45 is fixedly mounted on the rotating shaft 5 and is located in the reflux channel 44, with the outer wall of the spiral plate 45 in close contact with the inner wall of the reflux channel 44. By connecting the S-bend 43 between the detachable collecting barrel 4 and the reflux channel 44, the liquid in the detachable collecting barrel 4 passes through the S-bend 43 and enters the reflux channel 44. During the rotation of the rotating shaft 5, the spiral plate 45 is driven to rotate, and the spiral plate 45 forms a spiral flow channel pointing to the pump body 1 in the reflux channel 44, and provides a driving force to the reflux channel 44, thereby establishing a circulation of pump body 1 - lifting pipe 2 - suction port 41 - detachable collecting barrel 4 - S-bend 43 - reflux channel 44 - pump body 1, so that the reflux channel 44 exerts a suction force on the detachable collecting barrel 4, thereby driving the suction port 41 to suction normally, without the need for other suction mechanisms.

[0028] Furthermore, since the S-bend 43 is long and tortuous, the hot water has a longer time to pass through, and can fully exchange heat with the S-bend 43, further achieving a cooling effect on the hot water. The hot water will eventually flow to the return channel 44 at a lower temperature, playing a step-by-step cooling role on the rotating shaft 5.

[0029] As another embodiment provided by the present invention, the filter leaf groups 62 are all rotatable, and the filter screen area formed after the rotation is increased.

[0030] Specifically, such as Figure 3 - Figure 6 As shown, the filter leaf group 62 is rotatably arranged in the lifting pipe 2 and rotates on the vertical plane where the corresponding circular diameter is located. The length direction of each filter leaf group 62 deviates from the center of the circle, which makes an angle appear between the length direction of the filter leaf unit 6 and the rotating plane. When the filter leaf group 62 blocked by scale is pushed up and down by the water pressure, its end face is as shown in the figure. Figure 5 and Figure 7 The upward spiraling surface shown in the figure creates a rotational force when water flows upward along this end surface, causing the water flow to form a spiral vortex. The rotation of the filter blade assembly 62 increases the overall vertical projection area, thereby increasing the filtering area for the water flow. Since the gap area is small, the hot water passing through the gap is driven by the vortex to rotate.

[0031] Unlike simple rotational flow, spiral vortex flow combines axial flow with rotational motion, resulting in a more persistent and stable central low-pressure zone, increasing the likelihood of cavitation. The centrifugal effect and Bernoulli's principle act together to create a low-pressure zone in the relative space between the converging port 31 and the bucket-shaped portion, attracting scale, which is heavier than the liquid, into this low-pressure zone.

[0032] As another embodiment provided by the present invention, the filter leaf group 62 includes a lower filter screen 622 and an upper filter screen 621 arranged in sequence along the liquid outlet direction.

[0033] Specifically, since the hot water in the riser 2 flows from bottom to top, it can be combined with Figure 7 and Figure 8 to obtain that the upper filter screen 621 is located directly above the lower filter screen 622. The filter holes of the lower filter screen 622 and the upper filter screen 621 are arranged in a staggered manner to form a scaling surface. Upper filter holes 623 are formed in the upper filter screen 621, and lower filter holes 624 are formed in the lower filter screen 622. As shown in Figure 9 , the aperture of the lower filter holes 624 is larger than that of the upper filter holes 623. When the hot water passes through the filter blade group 62 without being blocked by scale, it will pass through the lower filter holes 624 and then enter the upper filter holes 623, so that the water flow does not pass directly, improving the filtering effect on the water flow. The staggered filter holes make it difficult for scale to pass through directly, and it will stay at the bottom side of the lower filter screen 622 and block the lower filter holes 624, forming a scaling surface.

[0034] The original scale will make the surface of the lower filter screen 622 uneven, increasing the attached surface area and providing more anchoring points for ions. And due to the dissolution-recrystallization process of slightly soluble salts on the surface of the original scale, the ion concentration in the surrounding solution may locally increase, reaching the supersaturated state faster, making it easier for scale to form on the scaling surface, thereby intercepting ions such as Ca²⁺ in the hot water, and reducing the ion concentration when the hot water exits.

[0035] As another embodiment provided by the present invention, the upper filter screen 621 is movably arranged on the lower filter screen 622 and maintains a predetermined distance, and spikes 625 smaller than the length of this distance are arranged on the upper filter screen 621.

[0036] Specifically, as shown in Figure 8 and Figure 9 , an elastic member 66 is arranged on the lower filter screen 622 to support the upper filter screen 621. Since the lower filter screen 622 is closer to the liquid inlet direction, it is subject to greater water pressure, and the upper filter screen 621 is relatively less pressured. The upper filter screen 621 and the lower filter screen 622 move relative to each other under the influence of the pressure difference, changing the distance between the two. And the spikes 625 are distributed at the positions of the lower filter holes 624. The spikes 625 pierce the lower filter holes 624 as the distance changes, breaking the scaling surface. The scattered scale will be driven to rotate by the eddy current and then enter the central low-pressure area in the relative space and stay under the attraction of the pressure.

[0037] As another embodiment provided by the present invention, it further includes a sliding rod 63 arranged at the center of the filter blade group 62, on which a cable 67 is arranged, and the cable 67 is tightened by the rotation of the sliding rod 63 to adjust the thickness of the filter blade group 62.

[0038] Specifically, as shown in Figure 7As shown, it further includes a fixing frame 61 for supporting the filter leaf group 62, and the cable 67 is fixedly connected to the fixing frame 61. Rotating rods 64 are fixedly arranged on both sides of the sliding rod 63, and the adjacent rotating rods 64 are connected by a universal joint 65 for universal rotation, so that the rotation of the filter leaf group 62 is synchronized. The lower filter screen 622 is fixedly arranged on the sliding rod 63, while the upper filter screen 621 slides axially relative to the sliding rod 63. The sliding rod 63 is rotatably arranged on the fixing frame 61. Since both the upper filter screen 621 and the lower filter screen 622 are in an S-shaped structure, the area for intercepting scale is increased, and the two rotating rods 64 are respectively located above the upper filter screen 621 and below the lower filter screen 622 (as Figure 10 shown). When the filter leaf group 62 is pushed by water pressure, it drives the sliding rod 63 to rotate. The rotation plane of the sliding rod 63 is the rotation plane of the filter leaf group 62, and the boundary of the rotation plane extends towards the center of the lifting pipe 2. Subsequently, the cable 67 is pulled by the fixing frame 61 due to the change in its position during the rotation process. One end of the cable 67 is connected to the outer wall of the fixing frame 61 through the lower end of the sliding rod 63, and the other end of the cable 67 is fixedly connected to the upper filter screen 621. Combining Figure 3 and Figure 4 , when the lower end of the sliding rod 63 rotates and approaches the axis from the outside to the inside, that is, the distance between the lower end of the sliding rod 63 and the outer wall of the fixing frame 61 increases, so that the upper filter screen 621 is pulled by the cable 67 and approaches the lower filter screen 622, and the thickness of the filter leaf group 62 changes.

[0039] As another embodiment provided by the present invention, it further includes a detection unit arranged in the suction port 41. The detection unit includes a floating ball 42, which has an open position with the maximum distance from the suction port 41.

[0040] Specifically, there is a damping spring between the floating ball 42 and the suction port 41 for maintaining a predetermined distance. A detection unit and an electric telescopic rod 47 electrically connected to the detection unit are arranged in the suction port 41. The detection unit includes detection elements well-known to those skilled in the art such as infrared sensors or image detectors. A threshold is set according to the distribution or image of the scale in the suction port 41. When the amount of scale exceeds this threshold, the electric telescopic rod 47 is automatically activated to push the floating ball 42 to the open position.

[0041] Furthermore, during the actual operation process, the scale may not only stay at the port of the suction port 41, but more may remain in the relative space. At this time, it is difficult for gravity sensors or image detectors to detect this part of the scale, and this part of the scale will be intercepted on the filter leaf group 62. As Figure 5 shown, when the filter leaf group 62 blocked by scale swings up and down under the push of water pressure, its end face is as Figure 5 and Figure 7The spiral upward inclined surface shown in the figure has a rotating force when the water flows upward along this end surface, so that the water forms a spiral vortex. When the filter leaf group 62 is not rotating, the upward water flow pushes the float 42 to overcome the force of the resistance spring and stick to the suction port 41. The low-pressure area formed after the spiral vortex is located below the float 42. At this time, the float 42 is attracted by the low pressure and is staggered from the suction port 41 under the elastic action of the resistance spring. The distance between them gradually increases to accommodate the inflow of scale. The suction force of the suction port 41 on the water flow is located above the float 42. The reaction force of the water flow prevents the float 42 from recovering. In this process, the scale on the filter leaf group 62 is removed, so that the filter leaf group 62 recovers to the state as shown in the figure. Figure 3 In the initial state shown, the speed of the spiral vortex decreases, the suction force on the float 42 is weakened, and the float 42 is reset under the elastic action of the blocking spring and closes the suction port 41 to prevent the liquid in the suction port 41 from flowing back.

[0042] When the amount of scale is high, it will accumulate between the float 42 and the suction port 41, making it difficult for the float 42 to reach the open position. At this time, the detection unit detects that the scale level at the suction port 41 exceeds the threshold, and the electric telescopic rod 47 pushes the float 42 to the open position. After the suction is completed, the detection unit detects that the scale level has returned to within the threshold, the electric telescopic rod retracts, and the float 42 is reset by the action of the resistance spring.

[0043] Working principle: After hot water enters the pump body 1 through the liquid inlet 11, it enters the lifting pipe 2 through centrifugal force under the rotation of the impeller. In this process, the scale in the hot water will be thrown to the inner wall of the pump body 1 by the centrifugal force, and then gather at the inner wall of the lifting pipe 2 along the inner wall of the pump body 1.

[0044] like Figure 3 As shown, the filter leaf assembly 62 encloses a bucket-shaped portion, with the narrow opening of the bucket-shaped portion facing the liquid inlet direction of the riser 2. This forms an upward angle between the bucket-shaped portion and the inner wall. This angle effectively retains and filters scale flowing along the inner wall of the riser 2, so that the scale remains on the bottom side of the filter leaf assembly 62.

[0045] When hot water passes through the filter leaf group 62, it will pass through the lower filter hole 624 and then enter the upper filter hole 623, so that the water flow does not pass directly, thereby improving the filtering effect on the water flow. The staggered filter holes make it difficult for scale to pass directly through, and it will stay on the bottom side of the lower filter 622 and block the lower filter hole 624, forming a scaling surface.

[0046] When the filter leaf group 62 clogged by scale is pushed by water pressure and swings up and down, its end surface is as follows Figure 5 and Figure 7The spirally upward inclined surface shown in the figure creates a rotational force when water flows upward along this end surface, causing the water flow to form a spiral vortex. Simultaneously, the cable 67 is pulled by the fixed frame 61 due to its position change during rotation. The other end of the cable 67 is fixedly connected to the upper filter screen 621, causing the upper filter screen 621 to be pulled by the cable 67 and approach the lower filter screen 622, thereby changing the thickness of the filter leaf assembly 62. The spikes 625 pierce the lower filter holes 624 as the spacing changes, breaking up the scale surface. The dispersed scale will rotate with the vortex and then enter the central low-pressure zone within the relative space, where it is attracted and retained by pressure.

[0047] The low-pressure area formed after the spiral vortex is generated is located below the float 42. At this time, the float 42 is attracted by the low pressure and is staggered with the suction port 41 under the elastic action of the resistance spring. The distance gradually increases to accommodate the inflow of scale, and the suction force of the suction port 41 on the water flow is located above the float 42. The reaction force of the water flow prevents the float 42 from recovering. The hot water enters the detachable collecting cylinder 4 through the suction port 41, establishing a circulation of pump body 1-lift pipe 2-suction port 41-detachable collecting cylinder 4-S-bend pipe 43-reflux channel 44-pump body 1.

[0048] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A chemical industry energy-saving water pump, comprising a pump body (1) and a lifting pipe (2) fixedly arranged thereon, and a rotating shaft (5) assembled on an energy-saving motor and used for driving an impeller to rotate, characterized in that, It includes a converging port (31) disposed in the riser pipe (2) and having an inner diameter decreasing along the liquid outlet direction; A filter leaf unit (6) disposed at the connection between the pump body (1) and the riser pipe (2), which includes a plurality of filter leaf groups (62) arranged in a circumferential array, and the wide mouth of the bucket-shaped part formed by enclosing the filter leaf groups (62) is adjacent to the wide part of the converging port (31); A suction port (41) located between the filter leaf unit (6) and the converging port (31), which is coaxial with the riser pipe (2); A detachable collection cylinder (4) disposed on the pump body (1), which is communicated with the suction port (41); A reflux channel (44) nested on the rotating shaft (5), which is used to guide the liquid discharged from the detachable collection cylinder (4) back to the pump body (1).

2. The chemical energy-saving water pump according to claim 1, characterized in that, A spiral plate (45) is disposed in the reflux channel (44).

3. A chemical energy-saving water pump according to claim 1, characterized in that, An S-shaped pipe (43) is communicated between the detachable collection cylinder (4) and the reflux channel (44).

4. The chemical energy-saving water pump according to claim 1, characterized in that, Each of the filter leaf groups (62) is rotatably disposed, and the filter screen area formed after rotation increases.

5. The chemical energy-saving water pump according to claim 1, wherein Each of the filter leaf groups (62) includes a lower filter screen (622) and an upper filter screen (621) arranged in sequence along the liquid outlet direction.

6. The chemical energy-saving water pump according to claim 5, wherein, The filter holes of the lower filter screen (622) and the upper filter screen (621) are staggered to form a fouling surface.

7. The chemical energy-saving water pump according to claim 5, characterized in that, The upper filter screen (621) is movably disposed on the lower filter screen (622) and maintains a predetermined distance, and spikes (625) shorter than the length of this distance are disposed on the upper filter screen (621).

8. A chemical energy-saving water pump according to claim 1, characterized in that, It further includes a slide bar (63) disposed at the center of the filter leaf group (62), on which a cable (67) is disposed, and the cable (67) is tightened by the rotation of the slide bar (63) to adjust the thickness of the filter leaf group (62).

9. The chemical industry energy-saving water pump according to claim 8, characterized in that, It further includes a fixing frame (61) for supporting the filter leaf group (62), and the cable (67) is fixedly connected to the fixing frame (61).

10. A chemical energy-saving water pump according to claim 1, characterized in that, It further includes a detection unit disposed in the suction port (41), and the detection unit includes a floating ball (42), which has an open working position with the maximum distance from the suction port (41).

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